U.S. patent application number 12/365878 was filed with the patent office on 2010-07-29 for albumin fusion proteins.
This patent application is currently assigned to Human Genome Sciences, Inc.. Invention is credited to Christopher P. Prior, Craig A. Rosen, Homayoun Sadeghi, Andrew J. Turner.
Application Number | 20100189686 12/365878 |
Document ID | / |
Family ID | 27394014 |
Filed Date | 2010-07-29 |
United States Patent
Application |
20100189686 |
Kind Code |
A1 |
Rosen; Craig A. ; et
al. |
July 29, 2010 |
Albumin Fusion Proteins
Abstract
The present invention encompasses albumin fusion proteins.
Nucleic acid molecules encoding the albumin fusion proteins of the
invention are also encompassed by the invention, as are vectors
containing these nucleic acids, host cells transformed with these
nucleic acids vectors, and methods of making the albumin fusion
proteins of the invention and using these nucleic acids, vectors,
and/or host cells. Additionally the present invention encompasses
pharmaceutical compositions comprising albumin fusion proteins and
methods of treating, preventing, or ameliorating diseases,
disorders or conditions using albumin fusion proteins of the
invention.
Inventors: |
Rosen; Craig A.;
(Laytonsville, MD) ; Sadeghi; Homayoun;
(Doylestown, PA) ; Prior; Christopher P.;
(Rosemont, PA) ; Turner; Andrew J.; (Eagleville,
PA) |
Correspondence
Address: |
FINNEGAN, HENDERSON, FARABOW, GARRETT & DUNNER;LLP
901 NEW YORK AVENUE, NW
WASHINGTON
DC
20001-4413
US
|
Assignee: |
Human Genome Sciences, Inc.
|
Family ID: |
27394014 |
Appl. No.: |
12/365878 |
Filed: |
February 4, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11078663 |
Mar 14, 2005 |
7507414 |
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12365878 |
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09833117 |
Apr 12, 2001 |
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11078663 |
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60229358 |
Apr 12, 2000 |
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60199384 |
Apr 25, 2000 |
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60256931 |
Dec 21, 2000 |
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Current U.S.
Class: |
424/85.6 ;
435/252.3; 435/252.35; 435/254.2; 435/320.1; 435/348; 435/358;
435/69.7; 530/351; 536/23.4 |
Current CPC
Class: |
A61P 31/18 20180101;
A61P 37/04 20180101; A61P 25/08 20180101; A61P 31/14 20180101; A61P
33/12 20180101; A61P 25/02 20180101; A61K 38/212 20130101; A61P
17/06 20180101; A61P 17/12 20180101; A61P 19/08 20180101; A61P
29/00 20180101; C07K 14/65 20130101; C07K 2319/50 20130101; C12N
9/96 20130101; A61P 9/00 20180101; A61P 1/00 20180101; A61P 5/40
20180101; A61P 21/00 20180101; A61P 31/22 20180101; A61K 48/00
20130101; A61P 7/06 20180101; A61P 35/02 20180101; A61P 37/02
20180101; C07K 14/62 20130101; A61P 3/14 20180101; A61P 13/12
20180101; C07K 14/56 20130101; Y02A 50/30 20180101; A61P 1/04
20180101; A61P 5/14 20180101; A61P 13/08 20180101; A61P 15/10
20180101; A61P 17/14 20180101; A61P 37/00 20180101; C07K 14/705
20130101; C07K 14/61 20130101; A61P 15/00 20180101; A61P 19/00
20180101; A61P 37/06 20180101; A61K 9/0019 20130101; A61P 7/00
20180101; A61P 13/00 20180101; A61P 31/00 20180101; A61P 35/00
20180101; C12N 15/62 20130101; A61P 11/06 20180101; A61K 47/42
20130101; A61P 9/12 20180101; A61P 27/02 20180101; A61P 15/18
20180101; A61P 17/02 20180101; A61P 33/06 20180101; A61P 7/04
20180101; A61P 9/06 20180101; A61P 5/00 20180101; A61K 47/65
20170801; A61P 37/08 20180101; C07K 14/76 20130101; C07K 14/765
20130101; A61P 39/02 20180101; A61P 19/10 20180101; A61P 3/10
20180101; A61P 13/02 20180101; A61P 1/16 20180101; A61P 25/16
20180101; A61P 33/02 20180101; A61P 43/00 20180101; C07K 2319/21
20130101; C07K 2319/75 20130101; A61K 2039/54 20130101; A61P 21/04
20180101; A61P 25/28 20180101; A61P 31/12 20180101; A61P 35/04
20180101; A61K 38/4846 20130101; A61P 1/18 20180101; A61K 38/38
20130101; A61P 25/00 20180101; A61P 9/10 20180101; A61P 17/00
20180101; A01K 2217/05 20130101; A61P 11/00 20180101; A61P 15/08
20180101; A61P 31/16 20180101; C07K 14/7151 20130101; C07K 2319/31
20130101; A61K 38/21 20130101; A61P 5/10 20180101; A61P 19/02
20180101; A61P 41/00 20180101; C07K 2319/00 20130101; A61P 31/20
20180101 |
Class at
Publication: |
424/85.6 ;
530/351; 536/23.4; 435/320.1; 435/252.3; 435/252.35; 435/348;
435/254.2; 435/358; 435/69.7 |
International
Class: |
A61K 38/38 20060101
A61K038/38; C07K 19/00 20060101 C07K019/00; C07H 21/04 20060101
C07H021/04; C12N 15/63 20060101 C12N015/63; C12N 1/20 20060101
C12N001/20; C12N 5/10 20060101 C12N005/10; C12N 1/19 20060101
C12N001/19; C12P 21/00 20060101 C12P021/00 |
Claims
1-59. (canceled)
60. An albumin fusion protein comprising an interferon beta
polypeptide fused to albumin, or albumin fragment or variant,
wherein said albumin fragment or variant has the ability to prolong
the serum half-life of the unfused interferon beta polypeptide, and
wherein said albumin fusion protein has interferon beta
activity.
61. The albumin fusion protein of claim 60, wherein said interferon
beta polypeptide is selected from: a) a full-length interferon
beta; b) a fragment of interferon beta; c) a variant of interferon
beta; and d) a mature interferon beta.
62. The albumin fusion protein of claim 61, wherein said fragment
of interferon beta is an N-terminal deletion mutant, a C-terminal
deletion mutant, or an N-terminal and C-terminal deletion
mutant.
63. The albumin fusion protein of claim 60, wherein said albumin,
or albumin fragment or variant, comprises an amino acid sequence
selected from: a) amino acid residues 1 to 585 of SEQ ID NO:18; and
b) amino acid residues 1 to 387 of SEQ ID NO:18.
64. The albumin fusion protein of claim 60, which further comprises
a second interferon beta polypeptide.
65. The albumin fusion protein of claim 60, wherein said interferon
beta polypeptide is fused at the N-terminus or at the C-terminus of
the albumin, or albumin fragment or variant.
66. The albumin fusion protein of claim 60, wherein said interferon
beta polypeptide is separated from said albumin, or albumin
fragment or variant, by a linker peptide.
67. The albumin fusion protein of claim 60, further comprising a
secretion leader sequence.
68. The albumin fusion protein of claim 60, which is
non-glycosylated.
69. The albumin fusion protein of claim 60, which is
glycosylated.
70. The albumin fusion protein of claim 60, which is expressed in
yeast.
71. The albumin fusion protein of claim 70, wherein said yeast is a
Saccharomyces cerevisiae.
72. The albumin fusion protein of claim 70, wherein said yeast is
glycosylation deficient.
73. The albumin fusion protein of claim 70, wherein said yeast is
glycosylation and protease deficient.
74. The albumin fusion protein of claim 60, wherein said fusion
protein is expressed by a mammalian cell.
75. The albumin fusion protein of claim 74, wherein said mammalian
cell is a COS cell, a CHO (Chinese hamster ovary) cell, or a NSO
cell.
76. A composition comprising the albumin fusion protein of claim 60
and a pharmaceutically acceptable carrier.
77. A kit comprising the composition of claim 76.
78. A nucleic acid-molecule comprising a polynucleotide encoding
the albumin fusion protein of claim 60.
79. The nucleic acid molecule of claim 78, which is part of an
expression cassette.
80. A vector comprising the nucleic acid molecule of claim 78.
81. An isolated host cell comprising the nucleic acid molecule of
claim 78.
82. An isolated host cell comprising the vector of claim 80.
83. A method of producing an albumin fusion protein comprising: (a)
culturing the isolated host cell of claim 81 in conditions such
that the albumin fusion protein is expressed; and (b) recovering
the albumin fusion protein.
84. A method of treating a disease or disorder in a patient,
comprising the step of administering the albumin fusion protein of
claim 60.
Description
[0001] This application claims the benefit of priority under 35
.sctn.119(e) based on the following U.S. provisional applications:
60/229,358 filed on Apr.12, 2000; 60/199,384 filed on Apr. 25,
2000; and 60/256,931 filed on Dec. 21, 2000. Each of the
provisional applications is hereby incorporated by reference in its
entirety.
BACKGROUND OF THE INVENTION
[0002] The invention relates generally to Therapeutic proteins
(including, but not limited to, a polypeptide, antibody, or
peptide, or fragments and variants thereof) fused to albumin or
fragments or variants of albumin. The invention further relates to
Therapeutic proteins (including, but not limited to, a polypeptide,
antibody, or peptide, or fragments and variants thereof) fused to
albumin or fragments or variants of albumin, that exhibit extended
shelf-life and/or extended or therapeutic activity in solution.
These fusion proteins are herein collectively referred to as
"albumin fusion proteins of the invention." The invention
encompasses therapeutic albumin fusion proteins, compositions,
pharmaceutical compositions, formulations and kits. Nucleic acid
molecules encoding the albumin fusion proteins of the invention are
also encompassed by the invention, as are vectors containing these
nucleic acids, host cells transformed with these nucleic acids
vectors, and methods of making the albumin fusion proteins of the
invention using these nucleic acids, vectors, and/or host
cells.
[0003] The invention is also directed to methods of in vitro
stabilizing a Therapeutic protein via fusion or conjugation of the
Therapeutic protein to albumin or fragments or variants of
albumin.
[0004] Human serum albumin (HSA, or HA), a protein of 585 amino
acids in its mature form (as shown in FIG. 15 or in SEQ ID NO:18),
is responsible for a significant proportion of the osmotic pressure
of serum and also functions as a carrier of endogenous and
exogenous ligands. At present, HA for clinical use is produced by
extraction from human blood. The production of recombinant HA (rHA)
in microorganisms has been disclosed in EP 330 451 and EP 361
991.
[0005] The role of albumin as a carrier molecule and its inert
nature are desirable properties for use as a carrier and
transporter of polypeptides in vivo. The use of albumin as a
component of an albumin fusion protein as a carrier for various
proteins has been suggested in WO 93/15199, WO 93/15200, and EP 413
622. The use of N-terminal fragments of HA for fusions to
polypeptides has also been proposed (EP 399 666). Fusion of albumin
to the Therapeutic protein may be achieved by genetic manipulation,
such that the DNA coding for HA, or a fragment thereof, is joined
to the DNA coding for the Therapeutic protein. A suitable host is
then transformed or transfected with the fused nucleotide
sequences, so arranged on a suitable plasmid as to express a fusion
polypeptide. The expression may be effected in vitro from, for
example, prokaryotic or eukaryotic cells, or in vivo e.g. from a
transgenic organism.
[0006] Therapeutic proteins in their native state or when
recombinantly produced, such as interferons and growth hormones,
are typically labile molecules exhibiting short shelf-lives,
particularly when formulated in aqueous solutions. The instability
in these molecules when formulated for administration dictates that
many of the molecules must be lyophilized and refrigerated at all
times during storage, thereby rendering the molecules difficult to
transport and/or store. Storage problems are particularly acute
when pharmaceutical formulations must be stored and dispensed
outside of the hospital environment. Many protein and peptide drugs
also require the addition of high concentrations of other protein
such as albumin to reduce or prevent loss of protein due to binding
to the container. This is a major concern with respect to proteins
such as IFN. For this reason, many Therapeutic proteins are
formulated in combination with large proportion of albumin carrier
molecule (100-1000 fold excess), though this is an undesirable and
expensive feature of the formulation.
[0007] Few practical solutions to the storage problems of labile
protein molecules have been proposed. Accordingly, there is a need
for stabilized, long lasting formulations of proteinaceous
therapeutic molecules that are easily dispensed, preferably with a
simple formulation requiring minimal post-storage manipulation.
SUMMARY OF THE INVENTION
[0008] The present invention is based, in part, on the discovery
that Therapeutic proteins may be stabilized to extend the
shelf-life, and/or to retain the Therapeutic protein's activity for
extended periods of time in solution, in vitro and/or in vivo, by
genetically or chemically fusing or conjugating the Therapeutic
protein to albumin or a fragment (portion) or variant of albumin,
that is sufficient to stabilize the protein and/or its activity. In
addition it has been determined that the use of albumin-fusion
proteins or albumin conjugated proteins may reduce the need to
formulate protein solutions with large excesses of carrier proteins
(such as albumin, unfused) to prevent loss of Therapeutic proteins
due to factors such as binding to the container.
[0009] The present invention encompasses albumin fusion proteins
comprising a Therapeutic protein (e.g., a polypeptide, antibody, or
peptide, or fragments and variants thereof) fused to albumin or a
fragment (portion) or variant of albumin. The present invention
also encompasses albumin fusion proteins comprising a Therapeutic
protein (e.g., a polypeptide, antibody, or peptide, or fragments
and variants thereof) fused to albumin or a fragment (portion) or
variant of albumin, that is sufficient to prolong the shelf life of
the Therapeutic protein, and/or stabilize the Therapeutic protein
and/or its activity in solution (or in a pharmaceutical
composition) in vitro and/or in vivo. Nucleic acid molecules
encoding the albumin fusion proteins of the invention are also
encompassed by the invention, as are vectors containing these
nucleic acids, host cells transformed with these nucleic acids
vectors, and methods of making the albumin fusion proteins of the
invention and using these nucleic acids, vectors, and/or host
cells.
[0010] The invention also encompasses pharmaceutical formulations
comprising an albumin fusion protein of the invention and a
pharmaceutically acceptable diluent or carrier. Such formulations
may be in a kit or container. Such kit or container may be packaged
with instructions pertaining to the extended shelf life of the
Therapeutic protein. Such formulations may be used in methods of
treating, preventing, ameliotationg or diagnosing a disease or
disease symptom in a patient, preferably a mammal, most preferably
a human, comprising the step of administering the pharmaceutical
formulation to the patient.
[0011] In other embodiments, the present invention encompasses
methods of preventing treating, or ameliorating a disease or
disorder. In preferred embodiments, the present invention
encompasses a method of treating a disease or disorder listed in
the "Preferred Indication Y" column of Table 1 comprising
administering to a patient in which such treatment, prevention or
amelioration is desired an albumin fusion protein of the invention
that comprises a Therapeutic protein portion corresponding to a
Therapeutic protein (or fragment or variant thereof) disclosed in
the "Therapeutic Protein X" column of Table 1 (in the same row as
the disease or disorder to be treated is listed in the "Preferred
Indication Y" column of Table 1) in an amount effective to treat
prevent or ameliorate the disease or disorder.
[0012] In another embodiment, the invention includes a method of
extending the shelf life of a Therapeutic protein (e.g., a
polypeptide, antibody, or peptide, or fragments and variants
thereof) comprising the step of fusing or conjugating the
Therapeutic protein to albumin or a fragment (portion) or variant
of albumin, that is sufficient to extend the shelf-life of the
Therapeutic protein. In a preferred embodiment, the Therapeutic
protein used according to this method is fused to the albumin, or
the fragment or variant of albumin. In a most preferred embodiment,
the Therapeutic protein used according to this method is fused to
albumin, or a fragment or variant of albumin, via recombinant DNA
technology or genetic engineering.
[0013] In another embodiment, the invention includes a method of
stabilizing a Therapeutic protein (e.g., a polypeptide, antibody,
or peptide, or fragments and variants thereof) in solution,
comprising the step of fusing or conjugating the Therapeutic
protein to albumin or a fragment (portion) or variant of albumin,
that is sufficient to stabilize the Therapeutic protein. In a
preferred embodiment, the Therapeutic protein used according to
this method is fused to the albumin, or the fragment or variant of
albumin. In a most preferred embodiment, the Therapeutic protein
used according to this method is fused to albumin, or a fragment or
variant of albumin, via recombinant DNA technology or genetic
engineering.
[0014] The present invention further includes transgenic organisms
modified to contain the nucleic acid molecules of the invention,
preferably modified to express the albumin fusion proteins encoded
by the nucleic acid molecules.
BRIEF DESCRIPTION OF THE FIGURES
[0015] FIG. 1 depicts the extended shelf-life of an HA fusion
protein in terms of the biological activity (Nb2 cell
proliferation) of HA-hGH remaining after incubation in cell culture
media for up to 5 weeks at 37.degree. C. Under these conditions,
hGH has no observed activity by week 2.
[0016] FIG. 2 depicts the extended shelf-life of an HA fusion
protein in terms of the stable biological activity (Nb2 cell
proliferation) of HA-hGH remaining after incubation in cell culture
media for up to 3 weeks at 4, 37, or 50.degree. C. Data is
normalized to the biological activity of hGH at time zero.
[0017] FIGS. 3A and 3B compare the biological activity of HA-hGH
with hGH in the Nb2 cell proliferation assay. FIG. 3A shows
proliferation after 24 hours of incubation with various
concentrations of hGH or the albumin fusion protein, and FIG. 3B
shows proliferation after 48 hours of incubation with various
concentrations of hGH or the albumin fusion protein.
[0018] FIG. 4 shows a map of a plasmid (pPPC0005) that can be used
as the base vector into which polynucleotides encoding the
Therapeutic proteins (including polypeptides and fragments and
variants thereof) may be cloned to form HA-fusions. Plasmid Map
key: PRB1p: PRB1 S. cerevisiae promoter; FL: Fusion leader
sequence; rHA: cDNA encoding HA; ADH1t: ADH1 S. cerevisiae
terminator; T3: T3 sequencing primer site; T7: T7 sequencing primer
site; Amp R: (3-lactamase gene; ori: origin of replication. Please
note that in the provisional applications to which this application
claims priority, the plasmid in FIG. 4 was labeled pPPC0006,
instead of pPPC0005. In addition the drawing of this plasmid did
not show certain pertinent restriction sites in this vector. Thus
in the present application, the drawing is labeled pPPC0005 and
more restriction sites of the same vector are shown.
[0019] FIG. 5 compares the recovery of vial-stored HA-IFN solutions
of various concentrations with a stock solution after 48 or 72
hours of storage.
[0020] FIG. 6 compares the activity of an HA-.alpha.-IFN fusion
protein after administration to monkeys via IV or SC.
[0021] FIG. 7 describes the bioavailability and stability of an
HA-.alpha.-IFN fusion protein.
[0022] FIG. 8 is a map of an expression vector for the production
of HA-.alpha.-IFN.
[0023] FIG. 9 shows the location of loops in HA.
[0024] FIG. 10 is an example of the modification of an HA loop.
[0025] FIG. 11 is a representation of the HA loops.
[0026] FIG. 12 shows the HA loop IV.
[0027] FIG. 13 shows the tertiary structure of HA.
[0028] FIG. 14 shows an example of a scFv-HA fusion
[0029] FIG. 15 shows the amino acid sequence of the mature fowl of
human albumin (SEQ ID NO:18) and a polynucleotide encoding it (SEQ
ID NO:17).
DETAILED DESCRIPTION
[0030] As described above, the present invention is based, in part,
on the discovery that a Therapeutic protein (e.g., a polypeptide,
antibody, or peptide, or fragments and variants thereof) may be
stabilized to extend the shelf-life and/or retain the Therapeutic
protein's activity for extended periods of time in solution (or in
a pharmaceutical composition) in vitro and/or in vivo, by
genetically fusing or chemically conjugating the Therapeutic
protein, polypeptide or peptide to all or a portion of albumin
sufficient to stabilize the protein and its activity.
[0031] The present invention relates generally to albumin fusion
proteins and methods of treating, preventing, or ameliorating
diseases or disorders. As used herein, "albumin fusion protein"
refers to a protein formed by the fusion of at least one molecule
of albumin (or a fragment or variant thereof) to at least one
molecule of a Therapeutic protein (or fragment or variant thereof).
An albumin fusion protein of the invention comprises at least a
fragment or variant of a Therapeutic protein and at least a
fragment or variant of human serum albumin, which are associated
with one another, preferably by genetic fusion (i.e., the albumin
fusion protein is generated by translation of a nucleic acid in
which a polynucleotide encoding all or a portion of a Therapeutic
protein is joined in-frame with a polynucleotide encoding all or a
portion of albumin) or chemical conjugation to one another. The
Therapeutic protein and albumin protein, once part of the albumin
fusion protein, may be referred to as a "portion", "region" or
"moiety" of the albumin fusion protein (e.g., a "Therapeutic
protein portion" or an "albumin protein portion").
[0032] In one embodiment, the invention provides an albumin fusion
protein comprising, or alternatively consisting of, a Therapeutic
protein (e.g., as described in Table 1) and a serum albumin
protein. In other embodiments, the invention provides an albumin
fusion protein comprising, or alternatively consisting of, a
biologically active and/or therapeutically active fragment of a
Therapeutic protein and a serum albumin protein. In other
embodiments, the invention provides an albumin fusion protein
comprising, or alternatively consisting of, a biologically active
and/or therapeutically active variant of a Therapeutic protein and
a serum albumin protein. In preferred embodiments, the serum
albumin protein component of the albumin fusion protein is the
mature portion of serum albumin.
[0033] In further embodiments, the invention provides an albumin
fusion protein comprising, or alternatively consisting of, a
Therapeutic protein, and a biologically active and/or
therapeutically active fragment of serum albumin. In further
embodiments, the invention provides an albumin fusion protein
comprising, or alternatively consisting of, a Therapeutic protein
and a biologically active and/or therapeutically active variant of
serum albumin. In preferred embodiments, the Therapeutic protein
portion of the albumin fusion protein is the mature portion of the
Therapeutic protein. In a further preferred embodiment, the
Therapeutic protein portion of the albumin fusion protein is the
extracellular soluble domain of the Therapeutic protein. In an
alternative embodiment, the Therapeutic protein portion of the
albumin fusion protein is the active form of the Therapeutic
protein.
[0034] In further embodiments, the invention provides an albumin
fusion protein comprising, or alternatively consisting of, a
biologically active and/or therapeutically active fragment or
variant of a Therapeutic protein and a biologically active and/or
therapeutically active fragment or variant of serum albumin. In
preferred embodiments, the invention provides an albumin fusion
protein comprising, or alternatively consisting of, the mature
portion of a Therapeutic protein and the mature portion of serum
albumin.
[0035] Therapeutic Proteins
[0036] As stated above, an albumin fusion protein of the invention
comprises at least a fragment or variant of a Therapeutic protein
and at least a fragment or variant of human serum albumin, which
are associated with one another, preferably by genetic fusion or
chemical conjugation.
[0037] As used herein, "Therapeutic protein" refers to proteins,
polypeptides, antibodies, peptides or fragments or variants
thereof, having one or more therapeutic and/or biological
activities. Therapeutic proteins encompassed by the invention
include but are not limited to, proteins, polypeptides, peptides,
antibodies, and biologics. (The terms peptides, proteins, and
polypeptides are used interchangeably herein.) It is specifically
contemplated that the term "Therapeutic protein" encompasses
antibodies and fragments and variants thereof. Thus an albumin
fusion protein of the invention may contain at least a fragment or
variant of a Therapeutic protein, and/or at least a fragment or
variant of an antibody. Additionally, the term "Therapeutic
protein" may refer to the endogenous or naturally occurring
correlate of a Therapeutic protein.
[0038] By a polypeptide displaying a "therapeutic activity" or a
protein that is "therapeutically active" is meant a polypeptide
that possesses one or more known biological and/or therapeutic
activities associated with a Therapeutic protein such as one or
more of the Therapeutic proteins described herein or otherwise
known in the art. As a non-limiting example, a "Therapeutic
protein" is a protein that is useful to treat, prevent or
ameliorate a disease, condition or disorder. As a non-limiting
example, a "Therapeutic protein" may be one that binds specifically
to a particular cell type (normal (e.g., lymphocytes) or abnormal
e.g., (cancer cells)) and therefore may be used to target a
compound (drug, or cytotoxic agent) to that cell type
specifically.
[0039] In another non-limiting example, a "Therapeutic protein" is
a protein that has a biological activity, and in particular, a
biological activity that is useful for treating preventing or
ameliorating a disease. A non-inclusive list of biological
activities that may be possessed by a Therapeutic protein includes,
enhancing the immune response, promoting angiogenesis, inhibiting
angiogenesis, regulating hematopoietic functions, stimulating nerve
growth, enhancing an immune response, inhibiting an immune
response, or any one or more of the biological activities described
in the "Biological Activities" section below.
[0040] As used herein, "therapeutic activity" or "activity" may
refer to an activity whose effect is consistent with a desirable
therapeutic outcome in humans, or to desired effects in non-human
mammals or in other species or organisms. Therapeutic activity may
be measured in vivo or in vitro. For example, a desirable effect
may be assayed in cell culture. As an example, when hGH is the
Therapeutic protein, the effects of hGH on cell proliferation as
described in Example 1 may be used as the endpoint for which
therapeutic activity is measured. Such in vitro or cell culture
assays are commonly available for many Therapeutic proteins as
described in the art.
[0041] Examples of useful assays for particular Therapeutic
proteins include, but are not limited to: IFN.beta. (anti-viral
assay: Rubinstein et al., J. Virol. 37(2):755-8 (1981);
Anti-proliferation assay: Gao Y, et al., Mol Cell Biol.
19(11):7305-13 (1999; and bioassay: Czarniecki et al., J. Virol. 49
p490 (1984)); IGF-1 (bioassay: Karey et al., Cancer Research 48
p4083); IL-2 soluble receptor and IL-2 receptor antagonist
(bioassay: Symons et al., Lymphokines and Interferons, A practical
Approach, Clemens et al., eds. IRL Press, p272; T cell
proliferation assay: Science 223: 1412-1415 (1984) natural killer
(NK) cell and Cit cytotoxicity assay: Science 288: 675-678 (2000);
C'ILL-2 Proliferation: Gillis et al J. Immunol. 120:2027 (1978));
calcitonin (assays include, but are not limited to Hypocalcemc Rat
Bioassay, bone resorbing assay and the pit assay, CT receptor
binding assay, CAMP stimulation assay: J Bone Miner Res
14(8):1425-31 (1999)); growth hormone releasing factor (Biological
assay: Mol Endocrinol 6(10):1734-44, Mol Endocrinol, 7:77-84
(1992)); parathyroid hormone (adenylyl cyclase stimulation in rat
osteosarcoma cells, ovariectornized rat model of osteoporosis:
IUBMB Life 49(2):131-5 (2000)), or as shown in Table 1 in the
"Exemplary Activity Assay" column.
[0042] Therapeutic proteins corresponding to a Therapeutic protein
portion of an albumin fusion protein of the invention, such as cell
surface and secretory proteins, are often modified by the
attachment of one or more oligosaccharide groups. The modification,
referred to as glycosylation, can dramatically affect the physical
properties of proteins and can be important in protein stability,
secretion, and localization. Glycosylation occurs at specific
locations along the polypeptide backbone. There are usually two
major types of glycosylation: glycosylation characterized by
O-linked oligosaccharides, which are attached to serine or
threonine residues; and glycosylation characterized by N-linked
oligosaccharides, which are attached to asparagine residues in an
Asn-X-Ser/Thr sequence, where X can be any amino acid except
proline. N-acetylneuramic acid (also known as sialic acid) is
usually the terminal residue of both N-linked and O-linked
oligosaccharides. Variables such as protein structure and cell type
influence the number and nature of the carbohydrate units within
the chains at different glycosylation sites. Glycosylation isomers
are also common at the same site within a given cell type.
[0043] For example, several types of human interferon are
glycosylated. Natural human interferon-.alpha.2 is O-glycosylated
at threonine 106, and N-glycosylation occurs at asparagine 72 in
interferon-.alpha.14 (Adolf et al., J. Biochem 276:511 (1991);
Nyman T A et al., J. Biochem 329:295 (1998)). The oligosaccharides
at asparagine 80 in natural interferon-.beta.1.alpha. may play an
important factor in the solubility and stability of the protein,
but may not be essential for its biological activity. This permits
the production of an unglycosylated analog (interferon-.beta.1b)
engineered with sequence modifications to enhance stability (Hosoi
et al., J. Interferon Res. 8:375 (1988; Karpusas et al., Cell Mol
Life Sci 54:1203 (1998); Knight, J. Interferon Res. 2:421 (1982);
Runkel et al., Pharm Res 15:641 (1998); Lin, Dev. Biol. Stand.
96:97 (1998))1. Interferon-y contains two N-linked oligosaccharide
chains at positions 25 and 97, both important for the efficient
formation of the bioactive recombinant protein, and having an
influence on the pharmacokinetic properties of the protein
(Sareneva et al., Eur. J. Biochem 242:191 (1996); Sareneva et al,.
Biochem J. 303:831 (1994); Sareneva et al., J. Interferon Res.
13:267 (1993)). Mixed O-linked and N-linked glycosylation also
occurs, for example in human erythropoietin, N-linked glycosylation
occurs at asparagine residues located at positions 24, 38 and 83
while O-linked glycosylation occurs at a serine residue located at
position 126 (Lai et al., J. Biol. Chem. 261:3116 (1986); Broudy et
al., Arch. Biochem. Biophys. 265:329 (1988)).
[0044] Therapeutic proteins corresponding, to a Therapeutic protein
portion of an albumin fusion protein of the invention, as well as
analogs and variants thereof, may be modified so that glycosylation
at one or more sites is altered as a result of manipulation(s) of
their nucleic acid sequence, by the host cell in which they are
expressed, or due to other conditions of their expression. For
example, glycosylation isomers may be produced by abolishing or
introducing glycosylation sites, e.g., by substitution or deletion
of amino acid residues, such as substitution of glutamine for
asparagine, or unglycosylated recombinant proteins may be produced
by expressing the proteins in host cells that will not glycosylate
them, e.g. in E. coli or glycosylation-deficient yeast. These
approaches are described in more detail below and are known in the
art.
[0045] Therapeutic proteins corresponding to a Therapeutic protein
portion of an albumin fusion protein of the invention include, but
are not limited to, calcitonin, growth hormone releasing factor,
insulin-like growth factor-1, interferon beta, interleukin-2, and
parathyroid hormone, in addition to those described in Table 1.
These proteins and nucleic acid sequences encoding these proteins
are well known and available in public databases such as Chemical
Abstracts Services Databases (e.g., the CAS Registry), GenBank, and
GenSeq as shown in Table 1.
[0046] Additional Therapeutic proteins corresponding to a
Therapeutic protein portion of an albumin fusion protein of the
invention include, but are not limited to, one or more of the
Therapeutic proteins or peptides disclosed in the "Therapeutic
Protein X" column of Table 1, or fragment or variable thereof.
[0047] Table 1 provides a non-exhaustive list of Therapeutic
proteins that correspond to a Therapeutic protein portion of an
albumin fusion protein of the invention. The "Therapeutic Protein
X" column discloses Therapeutic protein molecules followed by
parentheses containing scientific and brand names that comprise, or
alternatively consist of, that Therapeutic protein molecule or a
fragment or variant thereof. "Therapeutic protein X" as used herein
may refer either to an individual Therapeutic protein molecule (as
defined by the amino acid sequence obtainable from the CAS and
Genbank accession numbers), or to the entire group of Therapeutic
proteins associated with a given Therapeutic protein molecule
disclosed in this column. The "Exemplary Identifier" column
provides Chemical Abstracts Services (CAS) Registry Numbers
(published by the American Chemical Society) and/or Genbank
Accession Numbers ((e.g., Locus ID, NP_XXXXX (Reference Sequence
Protein), and XP_XXXXX (Model Protein) identifiers available
through the national Center for Biotechnology Information (NCBI)
webpage at www.ncbi.nlm.nih.gov) that correspond to entries in the
CAS Registry or Genbank database which contain an amino acid
sequence of the Therapeutic Protein Molecule or of a fragment or
variant of the Therapeutic Protein Molecule. The summary pages
associated with each of these CAS and Genbank Accession Numbers are
each incorporated by reference in their entireties, particularly
with respect to the amino acid sequences described therein. The
"PCT/Patent Reference" column provides U.S. Patent numbers, or PC1'
International Publication Numbers corresponding to patents and/or
published patent applications that describe the Therapeutic protein
molecule. Each of the patents and/or published patent applications
cited in the "PCT/Patent Reference" column are herein incorporated
by reference in their entireties. In particular, the amino acid
sequences of the specified polypeptide set forth in the sequence
listing of each cited "PCT/Patent Reference", the variants of these
amino acid sequences (mutations, fragments, etc.) set forth, for
example, in the detailed description of each cited "PCT/Patent
Reference", the therapeutic indications set forth, for example, in
the detailed description of each cited "PCT/Patent Reference", and
the activity assays for the specified polypeptide set forth in the
detailed description, and more particularly, the examples of each
cited "PCT/Patent Reference" are incorporated herein by reference.
The "Biological activity" column describes Biological activities
associated with the Therapeutic protein molecule. The "Exemplary
Activity Assay" column provides references that describe assays
which may be used to test the therapeutic and/or biological
activity of a Therapeutic protein or an albumin fusion protein of
the invention comprising a Therapeutic protein X portion. Each of
the references cited in the "Exemplary Activity Assay" column are
herein incorporated by reference in their entireties, particularly
with respect to the description of the respective activity assay
described in the reference (see Methods section, for example) for
assaying the corresponding biological activity set forth in the
"Biological Activity" column of Table 1. The "Preferred Indication
Y" column describes disease, disorders, and/or conditions that may
be treated, prevented, diagnosed, or ameliorated by Therapeutic
protein X or an albumin fusion protein of the invention comprising
a Therapeutic protein X portion.
TABLE-US-00001 Exemplary PCT/Patent Therapeutic Protein X
Identifier Reference Biological Activity Calcitonin (Salmon
CAS-21215-62-3 EP70675-A Calcitonin is a peptide Calcitonin
(Salcatonin); CAS-47931-85-1 JP05255391-A hormone synthesized by
the Calcitonin human- CAS-152874-80-1 EP95351-A parafollicular
cells of the salmon hybrid; CAS-60731-46-6 EP95351-A thyroid. It
causes reduction Forcaltonin; Fortical; LocusID: 796 WO9415962-A in
serum calcium--an effect Calcitonin; Calcitonina NP_001732 U.S.
Pat. No. 5,858,978 opposite to that of human Almirall; Calcitonina
XP_006209 parathyroid hormone. Hubber; Calcimar; Calsynar; Calogen;
Miacalcic; Miacalcin; SB205614; Macritonin; Cibacalcin;
Cibacalcina; Cibacalcine; Salmocalcin; PowderJect Calcitonin)
Growth hormone CAS-114466-38-5 WO8605812 Growth hormone-releasing
releasing factor CAS-86168-78-7 AU8429733 factor (GRF) is released
by (Sermorelin acetate; CAS-158827-34-0 U.S. Pat. No. 5,700,775 the
hypothalamus and acts Pralmorelin; CAS-83930-13-6 U.S. Pat. No.
5,939,386 on the adenohypophyse to Somatorelin; CAS-9034-39-3 U.S.
Pat. No. 5,416,073 stimulate the production of Somatoliberin;
Geref; LocusID: 2691 U.S. Pat. No. 4,888,286 growth hormone. Gerel;
Groliberin) NP_066567 XP_012959 IL-2 (Aldesleukin; CAS-110942-02-4
EP91539-A IL-2 is is a powerfully interleukin-2 fusion LocusID:
3558 EP215576-A immunoregulatory toxin; T cell growth NP_000577
WO9834952-A2 lymphokine that is factor; PROLEUKIN; XP_003373
WO9926663-A2 produced by lectin- or IMMUNACE; antigen-activated T
cells CELEUK; ONCOLIPIN that promotes the growth of 2; MACROLIN) B
and T cells and augments NK cell and CTL cell killing activity.
IL-2 fusion protein CAS-173146-27-5 EP91539-A IL-2, a cytokine
first (Denileukin diftitox; LocusID: 3558 EP215576-A identified as
a T cell growth DAB389interleukin-2; NP_000577 WO9834952-A2 factor,
has been proven to LY 335348; interleukin- XP_003373 WO9926663-A2
activate many cell types 2 fusion protein; including T cells, B
cells, interleukin-2-fusion and polymorphonuclear toxin; ONTAK)
neutrophils (PMN3). Fusion proteins of IL-2 with antibodies with
specificity for tumor associated antigens were used to treat
cancers by concentrating the cytokine in the tumor microenvironment
and in so doing directly enhance the tumoricidal effect of the
antibody and/or enhance the host immune response (T- cell, B-cell
or NK) against the tumor. Insulin-like growth CAS-68562-41-4;
WO9516703-A1 IGF-1 is a pleiotropic factor-1 (Mecasermin; LocusID:
3479; EP229750-A polypeptide with a wide Somazon; IGF-1; IGF-1
NP_000609; WO8600619-A range of actions in both complex; CEP 151;
XP_012220 EP155655-A central and peripheral CGP 35126; FK 780;
WO9204363-A nervous sytems. It is Mecar; RHIGF-1; involved in
growth and Somatomedin-1; development and protects Somatomedin-C;
neurons against cell death SOMATOKINE; via the activation of
MYOTROPHIN; IGEF; intracellular pathways DepoIGF-1) implicating
phosphatidylinositide 3/Akt kinase. Interferon beta (Interferon
CAS-74899-71-1 EP28033-A IFN beta displays anti-viral, beta-1a;
Interferon beta CAS-145155-23-3 EP48970-A anti-proliferative and
1b; Interferon-beta- CAS-145258-61-3 U.S. Pat. No. 5,326,859
immunomodulatory serine; SH 579; ZK LocusID: 3456 WO8202715-A
activities including 157046; BCDF; beta-2 LocusID: 3457 U.S. Pat.
No. 4,499,188 modulation of MHC antigen IF; Interferon-beta-2;
NP_002167 WO8302461-A expression, NK cell activity rhIL-6; SJ0031;
DL XP_005410 EP237019-A and IFNg production and 8234; FERON;
IFNbeta; EP146413-A IL12 production in BETASERON; U.S. Pat. No.
4,518,584 monocytes. AVONEX; REBIF; U.S. Pat. No. 4,588,585
BETAFERON; SIGOSIX) Parathyroid hormone CAS-9002-64-6 DE3312928-A
Main function is to regulate (PTH; Ostabolin; LocusID: 5741
WO8809376-A concentrations of Calcium ALX1-11; hPTH 1-34; NP_000306
WO880316-A and phosphate in the blood LY 333334; MN 10T; XP_005988
U.S. Pat. No. 5,420,242 o Imbalance of Ca/Pi causes parathyroid
hormone (1-31); altered neural transmission, FORTEO; destruction of
bone tissue, PARATHAR) hampered bone growth and muscle tetany.
Interacts with calcitonin. o stimulates the activity of osteocytes
which break down bone tissue and release Ca into blood o enhances
absorption of Ca/Pi from small intestine into blood o promotes
reabsorption of Ca and inhibits Pi by kidney tubules. Therapeutic
Protein X Exemplary Activity Assay Preferred Indication Y
Calcitonin (Salmon Hypocalcemic Rat Bioassay, Bone Disorders;
Fracture Calcitonin (Salcatonin); bone resorbing assay and the pit
prevention; Hypercalcemia; Calcitonin human- assay, CT receptor
binding Malignant hypercalcemia; salmon hybrid; assay, CAMP
stimulation assay: Osteoporosis; Paget's Forcaltonin; Fortical; J
Bone Miner Res 1999 disease Calcitonin; Calcitonina Aug; 14(8):
1425-31 Almirall; Calcitonina Hubber; Calcimar; Calsynar; Calogen;
Miacalcic; Miacalcin; SB205614; Macritonin; Cibacalcin;
Cibacalcina; Cibacalcine; Salmocalcin; PowderJect Calcitonin)
Growth hormone Growth hormone-releasing Cachexia; Diagnostic
releasing factor peptides (GHRPs) are known to Agents; Female
Infertility; (Sermorelin acetate; release growth hormone (GH) in
Growth hormone deficiency; Pralmorelin; vivo and in vitro by a
direct Muscle Wasting; Short Somatorelin; action on receptors in
anterior Stature; Postmenopausal Somatoliberin; Geref; pituitary
cells. Biological Osteoporosis; Idiopathic Gerel; Groliberin)
acivity can be measured in cell growth hormone deficiency lines
expressing growth hormone releasing factor receptor (Mol Endocrinol
1992 Oct; 6(10): 1734-44, Molecular Endocrinology, Vol 7, 77-84).
IL-2 (Aldesleukin; T cell proliferation assay Metastatic renal cell
interleukin-2 fusion "Biological activity of carcinoma and
metastatic toxin; T cell growth recombinant human interleukin-
melanoma; Malignant factor; PROLEUKIN; 2 produced in Escherichia
coli." Melanoma; Renal cell IMMUNACE; Science 223: 1412-1415, 1984.
carcinoma; HIV infections CELEUK; ONCOLIPIN natural killer (NK)
cell and CTL treatment; Inflammatory 2; MACROLIN) cytotoxicity
assay "Control of bowel disorders; Kaposi's homeostasis of CD8+
memory sarcoma; Leukaemia; T cells by opposing cytokines. Multiple
sclerosis; Science 288: 675-678, 2000; Rheumatoid arthritis; CTLL-2
Proliferation: Gillis et Transplant rejection; Type al (1978) J.
Immunol. 120, 1 diabetes mellitus; Lung 2027 Cancer; Acute myeloid
leukaemia; Hepatitis C; Non-Hodgkin's lymphoma; Ovarian cancer IL-2
fusion protein CTLL-2 T cell line proliferation T-cell lymphoma;
Alopecia; (Denileukin diftitox; assay for IL-2 bioactivity. Atopic
dermatitis; Chronic DAB389interleukin-2; (PMID: 11101150); CTLL-2
lymphocytic leukaemia; LY 335348; interleukin- Proliferation:
Gillis et al (1978) Cutaneous T-cell 2 fusion protein; J. Immunol.
120, 2027 lymphoma; HIV infections interleukin-2-fusion treatment;
Inflammatory toxin; ONTAK) bowel disorders; Multiple sclerosis;
Non-Hodgkin's lymphoma; Psoriasis; Rheumatoid arthritis; Transplant
rejection; Type 1 diabetes mellitus Insulin-like growth IGF-I
activity may be assayed in Diabetes mellitus; Growth factor-1
(Mecasermin; vitro using an serum withdrawal disorders; Frailty;
Somazon; IGF-1; IGF-1 apoptosis-protection assay. (J Amyotrophic
lateral complex; CEP 151; Endocrinol 2000 Oct; sclerosis;
Osteoarthritis; CGP 35126; FK 780; 167(1): 165-74). Proliferation
Kidney disease & Mecar; RHIGF-1; assay using breast carcinoma
cell neuropathy; Dwarfism; HIV- Somatomedin-1; line MCF-7 (Karey
1988 1 infections; Myocardial Somatomedin-C; Cancer Res. 48: 4083)
ischaemia; Osteoporosis; SOMATOKINE; Multiple sclerosis; Nerve
MYOTROPHIN; IGEF; disorders; Burns; diabetes; DepoIGF-1) peripheral
neuropathies Interferon beta (Interferon Anti-viral assay:
Rubinstein S, Melanoma; solid tumors; beta-1a; Interferon beta
Familletti PC, Pestka S. (1981) Multiple sclerosis; bacterial 1b;
Interferon-beta- Convenient assay for interferons. infections;
chemoprotection; serine; SH 579; ZK J. Virol. 37(2): 755-8 Anti-
thrombocytopenia; HIV 157046; BCDF; beta-2 proliferation assay: Gao
Y, et al infections; prostate cancer; IF; Interferon-beta-2; (1999)
Sensitivity of an epstein- cancer; hematological rhIL-6; SJ0031; DL
barr virus-positive tumor line, malignancies; hematological 8234;
FERON; IFNbeta; Daudi, to alpha interferon disorders; preleukemia;
BETASERON; correlates with expression of a glioma; hepatitis B;
AVONEX; REBIF; GC-rich viral transcript. Mol hepatitis C; human
BETAFERON; Cell Biol. 19(11): 7305-13. papillomavirus; pulmonary
SIGOSIX) fibrosis; Age-related macular degeneration; Brain cancer;
Glioblastoma multiforme; Liver cancer; Malignant melanoma;
Colorectal cancer; Crohn's disease; Neurological disorders;
Non-small cell lung cancer; Rheumatoid arthritis; Ulcerative
colitis Parathyroid hormone Adenylyl cyclase stimulation in
Osteoporosis; Malignant (PTH; Ostabolin; rat osteosarcoma cells,
hypercalcaemia ALX1-11; hPTH 1-34; ovariectomized rat model of LY
333334; MN 10T; osteoporosis: IUBMB Life 2000 parathyroid hormone
(1-31); Feb; 49(2): 131-5 FORTEO; PARATHAR)
[0048] In preferred embodiments, the albumin fusion proteins of the
invention are capable of a therapeutic activity and/or biologic
activity corresponding to the therapeutic activity and/or biologic
activity of the Therapeutic protein corresponding to the
Therapeutic protein portion of the albumin fusion protein listed in
the corresponding row of Table 1. (See, e.g., the "Biological
Activity" and "Therapeutic Protein X''columns of Table 1.) In
further preferred embodiments, the therapeutically active protein
portions of the albumin fusion proteins of the invention are
fragments or variants of the reference sequence cited in the
"Exemplary Identifier" column of Table 1, and are capable of the
therapeutic activity and/or biologic activity of the corresponding
Therapeutic protein disclosed in "Biological Activity" column of
Table 1.
Polypeptide and Polynucleotide Fragments and Variants
[0049] Fragments
[0050] The present invention is further directed to fragments of
the Therapeutic proteins described in Table 1, albumin proteins,
and/or albumin fusion proteins of the invention.
[0051] Even if deletion of one or more amino acids from the
N-terminus of a protein results in modification or loss of one or
more biological functions of the Therapeutic protein, albumin
protein, and/or albumin fusion protein, other Therapeutic
activities and/or functional activities (e.g., biological
activities, ability to multimerize, ability to bind a ligand) may
still be retained. For example, the ability of polypeptides with
N-terminal deletions to induce and/or bind to antibodies which
recognize the complete or mature forms of the polypeptides
generally will be retained when less than the majority of the
residues of the complete polypeptide are removed from the
N-terminus. Whether a particular polypeptide lacking N-terminal
residues of a complete polypeptide retains such immunologic
activities can readily be determined by routine methods described
herein and otherwise known in the art. It is not unlikely that a
mutein with a large number of deleted N-terminal amino acid
residues may retain some biological or immunogenic activities. In
fact, peptides composed of as few as six amino acid residues may
often evoke an immune response.
[0052] Accordingly, fragments of a Therapeutic protein
corresponding to a Therapeutic protein portion of an albumin fusion
protein of the invention, include the full length protein as well
as polypeptides having one or more residues deleted from the amino
terminus of the amino acid sequence of the reference polypeptide
(e.g., a Therapeutic protein as disclosed in Table 1). In
particular, N-terminal deletions may be described by the general
formula m-q, where q is a whole integer representing the total
number of amino acid residues in a reference polypeptide (e.g., a
Therapeutic protein referred to in Table 1), and m is defined as
any integer ranging from 2 to q-6. Polynucleotides encoding these
polypeptides are also encompassed by the invention.
[0053] In addition, fragments of serum albumin polypeptides
corresponding to an albumin protein portion of an albumin fusion
protein of the invention, include the full length protein as well
as polypeptides having one or more residues deleted from the amino
terminus of the amino acid sequence of the reference polypeptide
(i.e., serum albumin). In particular, N-terminal deletions may be
described by the general formula m-585, where 585 is a whole
integer representing the total number of amino acid residues in
serum albumin (SEQ ID NO:18), and m is defined as any integer
ranging from 2 to 579. Polynucleotides encoding these polypeptides
are also encompassed by the invention.
[0054] Moreover, fragments of albumin fusion proteins of the
invention, include the full length albumin fusion protein as well
as polypeptides having one or more residues deleted from the amino
terminus of the albumin fusion protein. In particular, N-terminal
deletions may be described by the general formula m-q, where q is a
whole integer representing the total number of amino acid residues
in the albumin fusion protein, and m is defined as any integer
ranging from 2 to q-6. Polynucleotides encoding these polypeptides
are also encompassed by the invention.
[0055] Also as mentioned above, even if deletion of one or more
amino acids from the N-terminus or C-terminus of a reference
polypeptide (e.g., a Therapeutic protein and/or serum albumin
protein) results in modification or loss of one or more biological
functions of the protein, other functional activities (e.g.,
biological activities, ability to multimerize, ability to bind a
ligand) and/or Therapeutic activities may still be retained. For
example the ability of polypeptides with C-terminal deletions to
induce and/or bind to antibodies which recognize the complete or
mature forms of the polypeptide generally will be retained when
less than the majority of the residues of the complete or mature
polypeptide are removed from the C-terminus. Whether a particular
polypeptide lacking the N-terminal and/or C-terminal residues of a
reference polypeptide retains Therapeutic activity can readily be
determined by routine methods described herein and/or otherwise
known in the art.
[0056] The present invention further provides polypeptides having
one or more residues deleted from the carboxy terminus of the amino
acid sequence of a Therapeutic protein corresponding to a
Therapeutic protein portion of an albumin fusion protein of the
invention (e.g., a Therapeutic protein referred to in Table 1). In
particular, C-terminal deletions may be described by the general
formula 1-n, where n is any whole integer ranging from 6 to q-1,
and where q is a whole integer representing the total number of
amino acid residues in a reference polypeptide (e.g., a Therapeutic
protein referred to in Table 1). Polynucleotides encoding these
polypeptides are also encompassed by the invention.
[0057] In addition, the present invention provides polypeptides
having one or more residues deleted from the carboxy terminus of
the amino acid sequence of an albumin protein corresponding to an
albumin protein portion of an albumin fusion protein of the
invention (e.g., serum albumin). In particular, C-terminal
deletions may be described by the general formula 1-n, where n is
any whole integer ranging from 6 to 584, where 584 is the whole
integer representing the total number of amino acid residues in
serum albumin (SEQ ID NO:18) minus 1. Polynucleotides encoding
these polypeptides are also encompassed by the invention.
[0058] Moreover, the present invention provides polypeptides having
one or more residues deleted from the carboxy terminus of an
albumin fusion protein of the invention. In particular, C-terminal
deletions may be described by the general formula 1-n, where n is
any whole integer ranging from 6 to q-1, and where q is a whole
integer representing the total number of amino acid residues in an
albumin fusion protein of the invention. Polynucleotides encoding
these polypeptides are also encompassed by the invention.
[0059] In addition, any of the above described N- or C-terminal
deletions can be combined to produce a N- and C-terminal deleted
reference polypeptide. The invention also provides polypeptides
having one or more amino acids deleted from both the amino and the
carboxyl termini, which may be described generally as having
residues m-n of a reference polypeptide (e.g., a Therapeutic
protein referred to in Table 1, or serum albumin (e.g., SEQ ID
NO:18), or an albumin fusion protein of the invention) where n and
m are integers as described above. Polynucleotides encoding these
polypeptides are also encompassed by the invention.
[0060] The present application is also directed to proteins
containing polypeptides at least 80%, 85%, 90%, 95%, 96%, 97%, 98%
or 99% identical to a reference polypeptide sequence (e.g., a
Therapeutic protein, serum albumin protein or an albumin fusion
protein of the invention) set forth herein, or fragments thereof.
In preferred embodiments, the application is directed to proteins
comprising polypeptides at least 80%, 85%, 90%, 95%, 96%, 97%, 98%
or 99% identical to reference polypeptides having the amino acid
sequence of N- and C-terminal deletions as described above.
Polynucleotides encoding these polypeptides are also encompassed by
the invention.
[0061] Preferred polypeptide fragments of the invention are
fragments comprising, or alternatively, consisting of, an amino
acid sequence that displays a Therapeutic activity and/or
functional activity (e.g. biological activity) of the polypeptide
sequence of the Therapeutic protein or serum albumin protein of
which the amino acid sequence is a fragment. Other preferred
polypeptide fragments are biologically active fragments.
Biologically active fragments are those exhibiting activity
similar, but not necessarily identical, to an activity of the
polypeptide of the present invention. The biological activity of
the fragments may include an improved desired activity, or a
decreased undesirable activity.
[0062] Variants
[0063] "Variant" refers to a polynucleotide or nucleic acid
differing from a reference nucleic acid or polypeptide, but
retaining essential properties thereof. Generally, variants are
overall closely similar,.and, in many regions, identical to the
reference nucleic acid or polypeptide.
[0064] As used herein, "variant", refers to a Therapeutic protein
portion of an albumin fusion protein of the invention, albumin
portion of an albumin fusion protein of the invention, or albumin
fusion protein differing in sequence from a Therapeutic protein
(e.g. see "therapeutic" column of Table 1), albumin protein, and/or
albumin fusion protein of the invention, respectively, but
retaining at least one functional and/or therapeutic property
thereof (e.g., a therapeutic activity and/or biological activity as
disclosed in the "Biological Activity" column of Table 1) as
described elsewhere herein or otherwise known in the art.
Generally, variants are overall very similar, and, in many regions,
identical to the amino acid sequence of the Therapeutic protein
corresponding to a Therapeutic protein portion of an albumin fusion
protein of the invention, albumin protein corresponding to an
albumin protein portion of an albumin fusion protein of the
invention, and/or albumin fusion protein of the invention. Nucleic
acids encoding these variants are also encompassed by the
invention.
[0065] The present invention is also directed to proteins which
comprise, or alternatively consist of, an amino acid sequence which
is at least 80%, 85%, 90%, 95%, 96%, 97%, 98%, 99% or 100%,
identical to, for example, the amino acid sequence of a Therapeutic
protein corresponding to a Therapeutic protein portion of an
albumin fusion protein of the invention (e.g., an amino acid
sequence disclosed in the "Exemplary Identifier" column of Table 1,
or fragments or variants thereof), albumin proteins (e.g., SEQ ID
NO:18 or fragments or variants thereof) corresponding to an albumin
protein portion of an albumin fusion protein of the invention,
and/or albumin fusion proteins of the invention. Fragments of these
polypeptides are also provided (e.g., those fragments described
herein). Further polypeptides encompassed by the invention are
polypeptides encoded by polynucleotides which hybridize to the
complement of a nucleic acid molecule encoding an amino acid
sequence of the invention under stringent hybridization conditions
(e.g., hybridization to filter bound DNA in 6.times. Sodium
chloride/Sodium citrate (SSC) at about 45 degrees Celsius, followed
by one or more washes in 0.2.times.SSC, 0.1% SDS at about 50-65
degrees Celsius), under highly stringent conditions (e.g.,
hybridization to filter bound DNA in 6.times. sodium
chloride/Sodium citrate (SSC) at about 45 degrees Celsius, followed
by one or more washes in 0.1.times.SSC, 0.2% SDS at about 68
degrees Celsius), or under other stringent hybridization conditions
which are known to those of skill in the art (see, for example,
Ausubel, F. M. et al., eds., 1989 Current protocol in Molecular
Biology, Green publishing associates, Inc., and John Wiley &
Sons Inc., New York, at pages 6.3.1 - 6.3.6 and 2.10.3).
Polynucleotides encoding these polypeptides are also encompassed by
the invention.
[0066] By a polypeptide having an amino acid sequence at least, for
example, 95% "identical" to a query amino acid sequence of the
present invention, it is intended that the amino acid sequence of
the subject polypeptide is identical to the query sequence except
that the subject polypeptide sequence may include up to five amino
acid alterations per each 100 amino acids of the query amino acid
sequence. In other words, to obtain a polypeptide having an amino
acid sequence at least 95% identical to a query amino acid
sequence, up to 5% of the amino acid residues in the subject
sequence may be inserted, deleted, or substituted with another
amino acid. These alterations of the reference sequence may occur
at the amino- or carboxy-terminal positions of the reference amino
acid sequence or anywhere between those terminal positions,
interspersed either individually among residues in the reference
sequence or in one or more contiguous groups within the reference
sequence.
[0067] As a practical matter, whether any particular polypeptide is
at least 80%, 85%, 90%, 95%, 96%, 97%, 98% or 99% identical to, for
instance, the amino acid sequence of an albumin fusion protein of
the invention or a fragment thereof (such as the Therapeutic
protein portion of the albumin fusion protein or the albumin
portion of the albumin fusion protein), can be determined
conventionally using known computer programs. A preferred method
for determining the best overall match between a query sequence (a
sequence of the present invention) and a subject sequence, also
referred to as a global sequence alignment, can be determined using
the FASTDB computer program based on the algorithm of Brutlag et
al. (Comp. App. Biosci.6:237-245 (1990)). In a sequence alignment
the query and subject sequences are either both nucleotide
sequences or both amino acid sequences. The result of said global
sequence alignment is expressed as percent identity. Preferred
parameters used in a FASTDB amino acid alignment are: Matrix=PAM 0,
k-tuple=2, Mismatch Penalty=1, Joining Penalty=20, Randomization
Group Length=0, Cutoff Score=l, Window Size=sequence length, Gap
Penalty=5, Gap Size Penalty=0.05, Window Size=500 or the length of
the subject amino acid sequence, whichever is shorter.
[0068] If the subject sequence is shorter than the query sequence
due to N- or C-terminal deletions, not because of internal
deletions, a manual correction must be made to the results. This is
because the FASTDB program does not account for N- and C-terminal
truncations of the subject sequence when calculating global percent
identity. For subject sequences truncated at the N- and C-termini,
relative to the query sequence, the percent identity is corrected
by calculating the number of residues of the query sequence that
are N- and C-terminal of the subject sequence, which are not
matched/aligned with a corresponding subject residue, as a percent
of the total bases of the query sequence. Whether a residue is
matched/aligned is determined by results of the FASTDB sequence
alignment. This percentage is then subtracted from the percent
identity, calculated by the above FASTDB program using the
specified parameters, to arrive at a final percent identity score.
This final percent identity score is what is used for the purposes
of the present invention. Only residues to the N- and C-termini of
the subject sequence, which are not matched/aligned with the query
sequence, are considered for the purposes of manually adjusting the
percent identity score. That is, only query residue positions
outside the farthest N- and C-terminal residues of the subject
sequence.
[0069] For example, a 90 amino acid residue subject sequence is
aligned with a 100 residue query sequence to determine percent
identity. The deletion occurs at the N-terminus of the subject
sequence and therefore, the FASTDB alignment does not show a
matching/alignment of the first 10 residues at the N-terminus. The
10 unpaired residues represent 10% of the sequence (number of
residues at the N- and C-termini not matched/total number of
residues in the query sequence) so 10% is subtracted from the
percent identity score calculated by the FASTDB program. If the
remaining 90 residues were perfectly matched the final percent
identity would be 90%. In another example, a 90 residue subject
sequence is compared with a 100 residue query sequence. This time
the deletions are internal deletions so there are no residues at
the N- or C-termini of the subject sequence which are not
matched/aligned with the query. In this case the percent identity
calculated by FASTDB is not manually corrected. Once again, only
residue positions outside the N- and C-terminal ends of the subject
sequence, as displayed in the FASTDB alignment, which are not
matched/aligned with the query sequence are manually corrected for.
No other manual corrections are to made for the purposes of the
present invention.
[0070] The variant will usually have at least 75% (preferably at
least about 80%, 90%, 95% or 99%) sequence identity with a length
of normal HA or Therapeutic protein which is the same length as the
variant. Homology or identity at the nucleotide or amino acid
sequence level is determined by BLAST (Basic Local Alignment Search
Tool) analysis using the algorithm employed by the programs blastp,
blastn, blastx, tblastn and tblastx (Karlin et al., Proc. Natl.
Acad. Sci. USA 87: 2264-2268 (1990) and Altschul, J. Mol. Evol. 36:
290-300 (1993), fully incorporated by reference) which are tailored
for sequence similarity searching.
[0071] The approach used by the BLAST program is to first consider
similar segments between a query sequence and a database sequence,
then to evaluate the statistical significance of all matches that
are identified and finally to summarize only those matches which
satisfy a preselected threshold of significance. For a discussion
of basic issues in similarity searching of sequence databases, see
Altschul et al., (Nature Genetics 6: 119-129 (1994)) which is fully
incorporated by reference. The search parameters for histogram,
descriptions, alignments, expect (i.e., the statistical
significance threshold for reporting matches against database
sequences), cutoff, matrix and filter are at the default settings.
The default scoring matrix used by blastp, blastx, tblastn, and
tblastx is the BLOSUM62 matrix (Henikoff et al., Proc. Natl. Acad.
Sci. USA 89: 10915-10919 (1992), fully incorporated by reference).
For blastn, the scoring matrix is set by the ratios of M (i.e., the
reward score for a pair of matching residues) to N (i.e., the
penalty score for mismatching residues), wherein the default values
for M and N are 5 and -4, respectively. Four blastn parameters may
be adjusted as follows: Q=10 (gap creation penalty); R=10 (gap
extension penalty); wink=1 (generates word hits at every
wink.sup.th position along the query); and gapw=16 (sets the window
width within which gapped alignments are generated). The equivalent
Blastp parameter settings were Q=9; R=2; wink=1; and gapw=32. A
Bestfit comparison between sequences, available in the GCG package
version 10.0, uses DNA parameters GAP=50 (gap creation penalty) and
LEN=3 (.sub.gap extension penalty) and the equivalent settings in
protein comparisons are GAP=8 and LEN=2.
[0072] The polynucleotide variants of the invention may contain
alterations in the coding regions, non-coding regions, or both.
Especially preferred are polynucleotide variants containing
alterations which produce silent substitutions, additions, or
deletions, but do not alter the properties or activities of the
encoded polypeptide. Nucleotide variants produced by silent
substitutions due to the degeneracy of the genetic code are
preferred. Moreover, polypeptide variants in which less than 50,
less than 40, less than 30, less than 20, less than 10, or 5-50,
5-25, 5-10, 1-5, or 1-2 amino acids are substituted, deleted, or
added in any combination are also preferred. Polynucleotide
variants can be produced for a variety of reasons, e.g., to
optimize codon expression for a particular host (change codons in
the human mRNA to those preferred by a bacterial host, such as,
yeast or E. coli).
[0073] In a preferred embodiment, a polynucleotide encoding an
albumin portion of an albumin fusion protein of the invention is
optimized for expression in yeast or mammalian cells. In further
preferred embodiment, a polynucleotide encoding a Therapeutic
protein portion of an albumin fusion protein of the invention is
optimized for expression in yeast or mammalian cells. In a still
further preferred embodiment, a polynucleotide encoding an albumin
fusion protein of the invention is optimized for expression in
yeast or mammalian cells.
[0074] In an alternative embodiment, a codon optimized
polynucleotide encoding a Therapeutic protein portion of an albumin
fusion protein of the invention does not hybridize to the wild type
polynucleotide encoding the Therapeutic protein under stringent
hybridization conditions as described herein. In a further
embodiment, a codon optimized polynucleotide encoding an albumin
portion of an albumin fusion protein of the invention does not
hybridize to the wild type polynucleotide encoding the albumin
protein under stringent hybridization conditions as described
herein. In another embodiment, a codon optimized polynucleotide
encoding an albumin fusion protein of the invention does not
hybridize to the wild type polynucleotide encoding the Therapeutic
protein portin or the albumin protein portion under stringent
hybridization conditions as described herein.
[0075] In an additional embodiment, polynucleotides encoding a
Therapeutic protein portion of an albumin fusion protein of the
invention do not comprise, or alternatively consist of, the
naturally occurring sequence of that Therapeutic protein. In a
further embodiment, polynucleotides encoding an albumin protein
portion of an albumin fusion protein of the invention do not
comprise, or alternatively consist of, the naturally occurring
sequence of albumin protein. In an alternative embodiment,
polynucleotides encoding an albumin fusion protein of the invention
do not comprise, or alternatively consist of, the naturally
occurring sequence of a Therapeutic protein portion or the albumin
protein portion.
[0076] In a preferred embodiment, an IL-2 Therapeutic protein
portion of an albumin fusion protein of the invention is encoded by
a polynucleotide that has been codon optimized for expression in
yeast and having the nucleotide sequence of SEQ ID NO:36. In
another preferred embodiment, an IL-2 Therapeutic protein portion
of an albumin fusion protein of the invention is encoded by a
polynucleotide that has been codon optimized for expression in
yeast and having the nucleotide sequence of a portion of the
nucleotide sequence of SEQ ID NO:36. In another preferred
embodiment, an IL-2 Therapeutic protein portion of an albumin
fusion protein of the invention is encoded by a polynucleotide that
has been codon optimized for expression in yeast and having the
nucleotide sequence of at least 30 contiguous nucleotides of the
nucleotide sequence of SEQ ID NO:36. In another preferred
embodiment, an IL-2 Therapeutic protein portion of an albumin
fusion protein of the invention is encoded by a polynucleotide that
has been codon optimized for expression in yeast and having the
nucleotide sequence of at least 90 contiguous nucleotides of the
nucleotide sequence of SEQ ID NO:36.
[0077] Naturally occurring variants are called "allelic variants,"
and refer to one of several alternate forms of a gene occupying a
given locus on a chromosome of an organism. (Genes II, Lewin, B.,
ed., John Wiley & Sons, New York (1985)). These allelic
variants can vary at either the polynucleotide and/or polypeptide
level and are included in the present invention. Alternatively,
non-naturally occurring variants may be produced by mutagenesis
techniques or by direct synthesis.
[0078] Using known methods of protein engineering and recombinant
DNA technology, variants may be generated to improve or alter the
characteristics of the polypeptides of the present invention. For
instance, one or more amino acids can be deleted from the
N-terminus or C-terminus of the polypeptide of the present
invention without substantial loss of biological function. As an
example, Ron et al. (J. Biol. Chem. 268: 2984-2988 (1993)) reported
variant KGF proteins having heparin binding activity even after
deleting 3, 8, or 27 amino-terminal amino acid residues. Similarly,
Interferon gamma exhibited up to ten times higher activity after
deleting 8-10 amino acid residues from the carboxy terminus of this
protein. (Dobeli et al., J. Biotechnology 7:199-216 (1988).)
[0079] Moreover, ample evidence demonstrates that variants often
retain a biological activity similar to that of the naturally
occurring protein. For example, Gayle and coworkers (J. Biol. Chem.
268:22105-22111 (1993)) conducted extensive mutational analysis of
human cytokine IL-1a. They used random mutagenesis to generate over
3,500 individual IL-1a mutants that averaged 2.5 amino acid changes
per variant over the entire length of the molecule. Multiple
mutations were examined at every possible amino acid position. The
investigators found that "[m]ost of the molecule could be altered
with little effect on either [binding or biological activity]." In
fact, only 23 unique amino acid sequences, out of more than 3,500
nucleotide sequences examined, produced a protein that
significantly differed in activity from wild-type.
[0080] Furthermore, even if deleting one or more amino acids from
the N-terminus or C-terminus of a polypeptide results in
modification or loss of one or more biological functions, other
biological activities may still be retained. For example, the
ability of a deletion variant to induce and/or to bind antibodies
which recognize the secreted form will likely be retained when less
than the majority of the residues of the secreted form are removed
from the N-terminus or C-terminus. Whether a particular polypeptide
lacking N- or C-terminal residues of a protein retains such
immunogenic activities can readily be determined by routine methods
described herein and otherwise known in the art.
[0081] Thus, the invention further includes polypeptide variants
which have a functional activity (e.g., biological activity and/or
therapeutic activity). In highly preferred embodiments the
invention provides variants of albumin fusion proteins that have a
functional activity (e.g., biological activity and/or therapeutic
activity, such as that disclosed in the "Biological Activity"
column in Table 1) that corresponds to one or more biological
and/or therapeutic activities of the Therapeutic protein
corresponding to the Therapeutic protein portion of the albumin
fusion protein. Such variants include deletions, insertions,
inversions, repeats, and substitutions selected according to
general rules known in the art so as have little effect on
activity.
[0082] In preferred embodiments, the variants of the invention have
conservative substitutions. By "conservative substitutions" is
intended swaps within groups such as replacement of the aliphatic
or hydrophobic amino acids Ala, Val, Leu and Ile; replacement of
the hydroxyl residues Ser and Thr; replacement of the acidic
residues Asp and Glu; replacement of the amide residues Asn and
Gln, replacement of the basic residues Lys. Arg, and His;
replacement of the aromatic residues Phe, Tyr, and Trp, and
replacement of the small-sized amino acids Ala, Ser, Thr, Met, and
Gly.
[0083] Guidance concerning how to make phenotypically silent amino
acid substitutions is provided, for example, in Bowie et al.,
"Deciphering the Message in Protein Sequences: Tolerance to Amino
Acid Substitutions," Science 247:1306-1310 (1990), wherein the
authors indicate that there are two main strategies for studying
the tolerance of an amino acid sequence to change.
[0084] The first strategy exploits the tolerance of amino acid
substitutions by natural selection during the process of evolution.
By comparing amino acid sequences in different species, conserved
amino acids can be identified. These conserved amino acids are
likely important for protein function. In contrast, the amino acid
positions where substitutions have been tolerated by natural
selection indicates that these positions are not critical for
protein function. Thus, positions tolerating amino acid
substitution could be modified while still maintaining biological
activity of the protein.
[0085] The second strategy uses genetic engineering to introduce
amino acid changes at specific positions of a cloned gene to
identify regions critical for protein function. For example, site
directed mutagenesis or alanine-scanning mutagenesis (introduction
of single alanine mutations at every residue in the molecule) can
be used. See Cunningham and Wells, Science 244:1081-1085 (1989).
The resulting mutant molecules can then be tested for biological
activity.
[0086] As the authors state, these two strategies have revealed
that proteins are surprisingly tolerant of amino acid
substitutions. The authors further indicate which amino acid
changes are likely to be permissive at certain amino acid positions
in the protein. For example, most buried (within the tertiary
structure of the protein) amino acid residues require nonpolar side
chains, whereas few features of surface side chains are generally
conserved. Moreover, tolerated conservative amino acid
substitutions involve replacement of the aliphatic or hydrophobic
amino acids Ala, Val, Leu and Ile; replacement of the hydroxyl
residues Ser and Thr; replacement of the acidic residues Asp and
Glu; replacement of the amide residues Asn and Gln, replacement of
the basic residues Lys, Arg, and His; replacement of the aromatic
residues Phe, Tyr, and Trp, and replacement of the small-sized
amino acids Ala, Ser, Thr, Met, and Gly. Besides conservative amino
acid substitution, variants of the present invention include (i)
polypeptides containing substitutions of one or more of the
non-conserved amino acid residues, where the substituted amino acid
residues may or may not be one encoded by the genetic code, or (ii)
polypeptides containing substitutions of one or more of the amino
acid residues having a substituent group, or (iii) polypeptides
which have been fused with or chemically conjugated to another
compound, such as a compound to increase the stability and/or
solubility of the polypeptide (for example, polyethylene glycol),
(iv) polypeptide containing additional amino acids, such as, for
example, an IgG Fc fusion region peptide. Such variant polypeptides
are deemed to be within the scope of those skilled in the art from
the teachings herein.
[0087] For example, polypeptide variants containing amino acid
substitutions of charged amino acids with other charged or neutral
amino acids may produce proteins with improved characteristics,
such as less aggregation. Aggregation of pharmaceutical
formulations both reduces activity and increases clearance due to
the aggregate's immunogenic activity. See Pinckard et al., Clin.
Exp. Immunol. 2:331-340 (1967); Robbins et al., Diabetes 36:
838-845 (1987); Cleland et al., Crit. Rev. Therapeutic Drug Carrier
Systems 10:307-377 (1993).
[0088] In specific embodiments, the polypeptides of the invention
comprise, or alternatively, consist of, fragments or variants of
the amino acid sequence of a Therapeutic protein described herein
and/or human serum albumin, and/or albumin fusion protein of the
invention, wherein the fragments or variants have 1-5, 5-10, 5-25,
5-50, 10-50 or 50-150, amino acid residue additions, substitutions,
and/or deletions when compared to the reference amino acid
sequence. In preferred embodiments, the amino acid substitutions
are conservative. Nucleic acids encoding these polypeptides are
also encompassed by the invention.
[0089] The polypeptide of the present invention can be composed of
amino acids joined to each other by peptide bonds or modified
peptide bonds, i.e., peptide isosteres, and may contain amino acids
other than the 20 gene-encoded amino acids. The polypeptides may be
modified by either natural processes, such as post-translational
processing, or by chemical modification techniques which are well
known in the art. Such modifications are well described in basic
texts and in more detailed monographs, as well as in a voluminous
research literature. Modifications can occur anywhere in a
polypeptide, including the peptide backbone, the amino acid
side-chains and the amino or carboxyl termini. It will be
appreciated that the same type of modification may be present in
the same or varying degrees at several sites in a given
polypeptide. Also, a given polypeptide may contain many types of
modifications. Polypeptides may be branched, for example, as a
result of ubiquitination, and they may be cyclic, with or without
branching. Cyclic, branched, and branched cyclic polypeptides may
result from posttranslation natural processes or may be made by
synthetic methods. Modifications include acetylation, acylation,
ADP-ribosylation, amidation, covalent attachment of flavin,
covalent attachment of a heme moiety, covalent attachment of a
nucleotide or nucleotide derivative, covalent attachment of a lipid
or lipid derivative, covalent attachment of phosphotidylinositol,
cross-linking, cyclization, disulfide bond formation,
demethylation, formation of covalent cross-links, formation of
cysteine, formation of pyroglutamate, formylation,
gamma-carboxylation, glycosylation, GPI anchor formation,
hydroxylation, iodination, methylation, myristylation, oxidation,
pegyiation, proteolytic processing, phosphorylation, prenylation,
racemization, selenoylation, sulfation, transfer-RNA mediated
addition of amino acids to proteins such as arginylation, and
ubiquitination. (See, for instance, PROTEINS--STRUCTURE AND
MOLECULAR PROPERTIES, 2nd Ed., T. E. Creighton, W. H. Freeman and
Company, New York (1993); POST-TRANSLATIONAL COVALENT MODIFICATION
OF PROTEINS, B. C. Johnson, Ed., Academic Press, New York, pgs.
1-12 (1983); Seifter et al., Meth. Enzymol. 182:626-646 (1990);
Rattan et al., Ann. N.Y. Acad. Sci. 663:48-62 (1992)).
Functional Activity
[0090] "A polypeptide having functional activity" refers to a
polypeptide capable of displaying one or more known functional
activities associated with the full-length, pro-protein, and/or
mature form of a Therapeutic protein. Such functional activities
include, but are not limited to, biological activity, antigenicity
[ability to bind (or compete with a polypeptide for binding) to an
anti-polypeptide antibody], immunogenicity (ability to generate
antibody which binds to a specific polypeptide of the invention),
ability to form multimers with polypeptides of the invention, and
ability to bind to a receptor or ligand for a polypeptide.
[0091] "A polypeptide having biological activity" refers to a
polypeptide exhibiting activity similar to, but not necessarily
identical to, an activity of a Therapeutic protein of the present
invention, including mature forms, as measured in a particular
biological assay, with or without dose dependency. In the case
where dose dependency does exist, it need not be identical to that
of the polypeptide, but rather substantially similar to the
dose-dependence in a given activity as compared to the polypeptide
of the present invention (i.e., the candidate polypeptide will
exhibit greater activity or not more than about 25-fold less and,
preferably, not more than about tenfold less activity, and most
preferably, not more than about three-fold less activity relative
to the polypeptide of the present invention).
[0092] In preferred embodiments, an albumin fusion protein of the
invention has at least one biological and/or therapeutic activity
associated with the Therapeutic protein (or fragment or variant
thereof) when it is not fused to albumin.
[0093] The albumin fusion proteins of the invention can be assayed
for functional activity (e.g., biological activity) using or
routinely modifying assays known in the art, as well as assays
described herein. Specifically, albumin fusion proteins may be
assayed for functional activity (e.g., biological activity or
therapeutic activity) using the assay referenced in the "Exemplary
Activity Assay" column of Table 1. Additionally, one of skill in
the art may routinely assay fragments of a Therapeutic protein
corresponding to a Therapeutic protein portion of an albumin fusion
protein of the invention, for activity using assays referenced in
its corresponding row of Table 1. Further, one of skill in the art
may routinely assay fragments of an albumin protein corresponding
to an albumin protein portion of an albumin fusion protein of the
invention, for activity using assays known in the art and/or as
described in the Examples section below.
[0094] For example, in one embodiment where one is assaying for the
ability of an albumin fusion protein of the invention to bind or
compete with a Therapeutic protein for binding to an
anti-Therapeutic polypeptide antibody and/or anti-albumin antibody,
various immunoassays known in the art can be used, including but
not limited to, competitive and non-competitive assay systems using
techniques such as radioimmunoassays, ELISA (enzyme linked
immunosorbent assay), "sandwich" immunoassays, immunoradiometric
assays, gel diffusion precipitation reactions, immunodiffusion
assays, in situ immunoassays (using colloidal gold, enzyme or
radioisotope labels, for example), western blots, precipitation
reactions, agglutination assays (e.g., gel agglutination assays,
hemagglutination assays), complement fixation assays,
immunofluorescence assays, protein A assays, and
immunoelectrophoresis assays, etc. In one embodiment, antibody
binding is detected by detecting a label on the primary antibody.
In another embodiment, the primary antibody is detected by
detecting binding of a secondary antibody or reagent to the primary
antibody. In a further embodiment, the secondary antibody is
labeled. Many means are known in the art for detecting binding in
an immunoassay and are within the scope of the present
invention.
[0095] In a preferred embodiment, where a binding partner (e.g., a
receptor or a ligand) of a Therapeutic protein is identified,
binding to that binding partner by an albumin fusion protein
containing that Therapeutic protein as the Therapeutic protein
portion of the fusion can be assayed, e.g., by means well-known in
the art, such as, for example, reducing and non-reducing gel
chromatography, protein affinity chromatography, and affinity
blotting. See generally, Phizicky et al., Microbiol. Rev. 59:94-123
(1995). In another embodiment, the ability of physiological
correlates of an albumin fusion protein of the present invention to
bind to a substrate(s) of the Therapeutic polypeptide corresponding
to the Therapeutic portion of the albumin fusion protein of the
invention can be routinely assayed using techniques known in the
art.
[0096] In an alternative embodiment, where the ability of an
albumin fusion protein of the invention to multimerize is being
evaluated, association with other components of the multimer can be
assayed, e.g., by means well-known in the art, such as, for
example, reducing and non-reducing gel chromatography, protein
affinity chromatography, and affinity blotting. See generally,
Phizicky et al., supra.
[0097] In addition, assays described herein (see Examples and Table
1) and otherwise known in the art may routinely be applied to
measure the ability of albumin fusion proteins of the present
invention and fragments, variants and derivatives thereof to elicit
biological activity and/or Therapeutic activity (either in vitro or
in vivo) related to either the Therapeutic protein portion and/or
albumin portion of the albumin fusion protein of the present
invention. Other methods will be known to the skilled artisan and
are within the scope of the invention.
[0098] Albumin
[0099] As described above, an albumin fusion protein of the
invention comprises at least a fragment or variant of a Therapeutic
protein and at least a fragment or variant of human serum albumin,
which are associated with one another, preferably by genetic fusion
or chemical conjugation.
[0100] The terms, human serum albumin (HSA) and human albumin (HA)
are used interchangeably herein. The terms, "albumin and "serum
albumin" are broader, and encompass human serum albumin (and
fragments and variants thereof) as well as albumin from other
species (and fragments and variants thereof).
[0101] As used herein, "albumin" refers collectively to albumin
protein or amino acid sequence, or an albumin fragment or variant,
having one or more functional activities (e.g., biological
activities) of albumin. In particular, "albumin" refers to human
albumin or fragments thereof (see EP 201 239, EP 322 094 WO
97/24445, WO95/23857) especially the mature form of human albumin
as shown in FIG. 15 and SEQ ID NO:18, or albumin from other
vertebrates or fragments thereof, or analogs or variants of these
molecules or fragments thereof.
[0102] In preferred embodiments, the human serum albumin protein
used in the albumin fusion proteins of the invention contains one
or both of the following sets of point mutations with reference to
SEQ ID NO:18: Leu-407 to Ala, Leu-408 to Val, Val-409 to Ala, and
Arg-410 to Ala; or Arg-410 to A, Lys-413 to Gln, and Lys-414 to Gln
(see, e.g., International Publication No. WO95/23857, hereby
incorporated in its entirety by reference herein). In even more
preferred embodiments, albumin fusion proteins of the invention
that contain one or both of above-described sets of point mutations
have improved stability/resistance to yeast Yap3p proteolytic
cleavage, allowing increased production of recombinant albumin
fusion proteins expressed in yeast host cells.
[0103] As used herein, a portion of albumin sufficient to prolong
the therapeutic activity or shelf-life of the Therapeutic protein
refers to a portion of albumin sufficient in length or structure to
stabilize or prolong the therapeutic activity of the protein so
that the shelf life of the Therapeutic protein portion of the
albumin fusion protein is prolonged or extended compared to the
shelf-life in the non-fusion state. The albumin portion of the
albumin fusion proteins may comprise the full length of the HA
sequence as described above or as shown in FIG. 15, or may include
one or more fragments thereof that are capable of stabilizing or
prolonging the therapeutic activity. Such fragments may be of 10 or
more amino acids in length or may include about 15, 20, 25, 30, 50,
or more contiguous amino acids from the HA sequence or may include
part or all of specific domains of HA. For instance, one or more
fragments of HA spanning the first two immunoglobulin-like domains
may be used.
[0104] The albumin portion of the albumin fusion proteins of the
invention may be a variant of normal HA. The Therapeutic protein
portion of the albumin fusion proteins of the invention may also be
variants of the Therapeutic proteins as described herein. The term
"variants" includes insertions, deletions and substitutions, either
conservative or non conservative, where such changes do not
substantially alter one or more of the oncotic, useful
ligand-binding and non-immunogenic properties of albumin, or the
active site, or active domain which confers the therapeutic
activities of the Therapeutic proteins.
[0105] In particular, the albumin fusion proteins of the invention
may include naturally occurring polymorphic variants of human
albumin and fragments of human albumin, for example those fragments
disclosed in EP 322 094 (namely HA (Pn), where n is 369 to 419).
The albumin may be derived from any vertebrate, especially any
mammal, for example human, cow, sheep, or pig. Non-mammalian
albumins include, but are not limited to, hen and salmon. The
albumin portion of the albumin fusion protein may be from a
different animal than the Therapeutic protein portion.
[0106] Generally speaking, an HA fragment or variant will be at
least 100 amino acids long, preferably at least 150 amino acids
long. The HA variant may consist of or alternatively comprise at
least one whole domain of HA, for example domains 1 (amino acids
1-194 of SEQ ID NO:18), 2 (amino acids 195-387 of SEQ ID NO:18), 3
(amino acids 388-585 of SEQ ID NO:18), 1+2 (1-387 of SEQ ID NO:18),
2+3 (195-585 of SEQ ID NO:18) or 1+3 (amino acids 1-194 of SEQ ID
NO:18+amino acids 388-585 of SEQ ID NO:18). Each domain is itself
made up of two homologous subdomains namely 1-105, 120-194,
195-291, 316-387, 388-491 and 512-585, with flexible
inter-subdomain linker regions comprising residues Lys106 to
Glu119, Glu292 to Va1315 and Glu492 to Ala511.
[0107] Preferably, the albumin portion of an albumin fusion protein
of the invention comprises at least one subdomain or domain of HA
or conservative modifications thereof. If the fusion is based on
subdomains, some or all of the adjacent linker is preferably used
to link to the Therapeutic protein moiety.
Albumin Fusion Proteins
[0108] The present invention relates generally to albumin fusion
proteins and methods of treating, preventing, or ameliorating
diseases or disorders. As used herein, "albumin fusion protein"
refers to a protein formed by the fusion of at least one molecule
of albumin (or a fragment or variant thereof) to at least one
molecule of a Therapeutic protein (or fragment or variant thereof).
An albumin fusion protein of the invention comprises at least a
fragment or variant of a Therapeutic protein and at least a
fragment or variant of human serum albumin, which are associated
with one another, preferably by genetic fusion (i.e., the albumin
fusion protein is generated by translation of a nucleic acid in
which a polynucleotide encoding all or a portion of a Therapeutic
protein is joined in-frame with a polynucleotide encoding all or a
portion of albumin) or chemical conjugation to one another. The
Therapeutic protein and albumin protein, once part of the albumin
fusion protein, may be referred to as a "portion", "region" or
"moiety" of the albumin fusion protein.
[0109] In one embodiment, the invention provides an albumin fusion
protein comprising, or alternatively consisting of, a Therapeutic
protein (e.g., as described in Table 1) and a serum albumin
protein. In other embodiments, the invention provides an albumin
fusion protein comprising, or alternatively consisting of, a
biologically active and/or therapeutically active fragment of a
Therapeutic protein and a serum albumin protein. In other
embodiments, the invention provides an albumin fusion protein
comprising, or alternatively consisting of, a biologically active
and/or therapeutically active variant of a Therapeutic protein and
a serum albumin protein. In preferred embodiments, the serum
albumin protein component of the albumin fusion protein is the
mature portion of serum albumin.
[0110] In further embodiments, the invention provides an albumin
fusion protein comprising, or alternatively consisting of, a
Therapeutic protein, and a biologically active and/or
therapeutically active fragment of serum albumin. In further
embodiments, the invention provides an albumin fusion protein
comprising, or alternatively consisting of, a Therapeutic protein
and a biologically active and/or therapeutically active variant of
serum albumin. In preferred embodiments, the Therapeutic protein
portion of the albumin fusion protein is the mature portion of the
Therapeutic protein.
[0111] In further embodiments, the invention provides an albumin
fusion protein comprising, or alternatively consisting of, a
biologically active and/or therapeutically active fragment or
variant of a Therapeutic protein and a biologically active and/or
therapeutically active fragment or variant of serum albumin. In
preferred embodiments, the invention provides an albumin fusion
protein comprising, or alternatively consisting of, the mature
portion of a Therapeutic protein and the mature portion of serum
albumin.
[0112] Preferably, the albumin fusion protein comprises HA as the
N-terminal portion, and a Therapeutic protein as the C-terminal
portion. Alternatively, an albumin fusion protein comprising HA as
the C-terminal portion, and a Therapeutic protein as the
N-teiiiiinal portion may also be used.
[0113] In other embodiments, the albumin fusion protein has a
Therapeutic protein fused to both the N-terminus and the C-terminus
of albumin. In a preferred embodiment, the
[0114] Therapeutic proteins fused at the N- and C-termini are the
same Therapeutic proteins. In a preferred embodiment, the
Therapeutic proteins fused at the N- and C-termini are different
Therapeutic proteins. In another preferred embodiment, the
Therapeutic proteins fused at the N- and C-termini are different
Therapeutic proteins which may be used to treat or prevent the same
disease, disorder, or condition (e.g. as listed in the "Preferred
Indication Y" column of Table 1). In another preferred embodiment,
the Therapeutic proteins fused at the N- and C-termini are
different Therapeutic proteins which may be used to treat or
prevent diseases or disorders (e.g. as listed in the "Preferred
Indication Y" column of Table 1) which are known in the art to
commonly occur in patients simultaneously.
[0115] In addition to albumin fusion protein in which the albumin
portion is fused N-terminal and/or C-terminal of the Therapeutic
protein portion, albumin fusion proteins of the invention may also
be produced by inserting the Therapeutic protein or peptide of
interest (e.g., Therapeutic protein X as diclosed in Table 1) into
an internal region of HA. For instance, within the protein sequence
of the HA molecule a number of loops or turns exist between the end
and beginning of .alpha.-helices, which are stabilized by
disulphide bonds (see FIGS. 9-11). The loops, as determined from
the crystal structure of HA (FIG. 13) (PDB identifiers 1AO6, 1BJ5,
1BKE, 1BM0, 1E7E to 1E71 and 1UOR) for the most part extend away
from the body of the molecule. These loops are useful for the
insertion, or internal fusion, of therapeutically active peptides,
particularly those requiring a secondary structure to be
functional, or Therapeutic proteins, to essentially generate an
albumin molecule with specific biological activity.
[0116] Loops in human albumin structure into which peptides or
polypeptides may be inserted to generate albumin fusion proteins of
the invention include: Va154-Asn61, Thr76-Asp89, Ala92-Glu100,
Gln170-Ala176, His247-Glu252, Glu266-Glu277, Glu280-His288,
Ala362-Glu368, Lys439-Pro447,Va1462-Lys475, Thr478-Pro486, and
Lys560-Thr566. In more preferred embodiments, peptides or
polypeptides are inserted into the Va154-Asn61, Gln170-Ala176,
and/or Lys560-Thr566 loops of mature human albumin (SEQ ID
NO:18).
[0117] Peptides to be inserted may be derived from either phage
display or synthetic peptide libraries screened for specific
biological activity or from the active portions of a molecule with
the desired function. Additionally, random peptide libraries may be
generated within particular loops or by insertions of randomized
peptides into particular loops of the HA molecule and in which all
possible combinations of amino acids are represented.
[0118] Such library(s) could be generated on HA or domain fragments
of HA by one of the following methods:
[0119] (a) randomized mutation of amino acids within one or more
peptide loops of HA or HA domain fragments. Either one, more or all
the residues within a loop could be mutated in this manner (for
example see FIG. 10a);
[0120] (b) replacement of, or insertion into one or more loops of
HA or HA domain fragments (i.e., internal fusion) of a randomized
peptide(s) of length X.sub.n (where X is an amino acid and n is the
number of residues (for example see FIG. 10b); (c) N-, C- or N- and
C-terminal peptide/protein fusions in addition to (a) and/or
(b).
[0121] The HA or HA domain fragment may also be made
multifunctional by grafting the peptides derived from different
screens of different loops against different targets into the same
HA or HA domain fragment.
[0122] In preferred embodiments, peptides inserted into a loop of
human serum albumin are peptide fragments or peptide variants of
the Therapeutic proteins disclosed in Table 1. More particulary,
the invention encompasses albumin fusion proteins which comprise
peptide fragments or peptide variants at least 7 at least 8, at
least 9, at least 10, at least 11, at least 12, at least 13, at
least 14, at least 15, at least 20, at least 25, at least 30, at
least 35, or at least 40 amino acids in length inserted into a loop
of human serum albumin. The invention also encompasses albumin
fusion proteins which comprise peptide fragments or peptide
variants at least 7 at least 8, at least 9, at least 10, at least
11, at least 12, at least 13, at least 14, or least 15, at least
20, at least 25, at least 30, at least 35, or at least 40 amino
acids fused to the N-terminus of human serum albumin. The invention
also encompasses albumin fusion proteins which comprise peptide
fragments or peptide variants at least 7 at least 8, at least 9, at
least 10, at least 11, at least 12, at least 13, at least 14, at
least 15, at least 20, at least 25, at least 30, at least 35, or at
least 40 amino acids fused to the C-terminus of human serum
albumin.
[0123] Generally, the albumin fusion proteins of the invention may
have one HA-derived region and one Therapeutic protein-derived
region. Multiple regions of each protein, however, may be used to
make an albumin fusion protein of the invention. Similarly, more
than one Therapeutic protein may be used to make an albumin fusion
protein of the invention. For instance, a Therapeutic protein may
be fused to both the N- and C-terminal ends of the HA. In such a
configuration, the Therapeutic protein portions may be the same or
different Therapeutic protein molecules. The structure of
bifunctional albumin fusion proteins may be represented as: X-HA-Y
or Y-HA-X.
[0124] For example, an anti-BLyS.TM. scFv-HA-IFN.alpha.-2b fusion
may be prepared to modulate the immune response to IFN.alpha.-2b by
anti-BLyS.TM. scFv. An alternative is making a bi (or even multi)
functional dose of HA-fusions e.g. HA-IFN.alpha.-2b fusion mixed
with HA-anti-BLyS.TM. scFv fusion or other HA-fusions in various
ratio's depending on function, half-life etc.
[0125] Bi- or multi-functional albumin fusion proteins may also be
prepared to target the Therapeutic protein portion of a fusion to a
target organ or cell type via protein or peptide at the opposite
terminus of HA.
[0126] As an alternative to the fusion of known therapeutic
molecules, the peptides could be obtained by screening libraries
constructed as fusions to the N-, C- or N- and C-termini of HA, or
domain fragment of HA, of typically 6, 8, 12, 20 or 25 or X.sub.n,
(where X is an amino acid (aa) and n equals the number of residues)
randomized amino acids, and in which all possible combinations of
amino acids were represented. A particular advantage of this
approach is that the peptides may be selected in situ on the HA
molecule and the properties of the peptide would therefore be as
selected for rather than, potentially, modified as might be the
case for a peptide derived by any other method then being attached
to HA.
[0127] Additionally, the albumin fusion proteins of the invention
may include a linker peptide between the fused portions to provide
greater physical separation between the moieties and thus maximize
the accessibility of the Therapeutic protein portion, for instance,
for binding to its cognate receptor. The linker peptide may consist
of amino acids such that it is flexible or more rigid.
[0128] The linker sequence may be cleavable by a protease or
chemically to yield the growth hormone related moiety. Preferably,
the protease is one which is produced naturally by the host, for
example the S. cerevisiae protease kex2 or equivalent
proteases.
[0129] Therefore, as described above, the albumin fusion proteins
of the invention may have the following formula R1-L-R2; R2-L-R1;
or R1-L-R2-L-R1, wherein R1 is at least one Therapeutic protein,
peptide or polypeptide sequence, and not necessarily the same
Therapeutic protein, L is a linker and R2 is a serum albumin
sequence.
[0130] In preferred embodiments, Albumin fusion proteins of the
invention comprising a Therapeutic protein have extended shelf life
compared to the shelf life the same Therapeutic protein when not
fused to albumin. Shelf-life typically refers to the time period
over which the therapeutic activity of a Therapeutic protein in
solution or in some other storage formulation, is stable without
undue loss of therapeutic activity. Many of the Therapeutic
proteins are highly labile in their unfused state. As described
below, the typical shelf-life of these Therapeutic proteins is
markedly prolonged upon incorporation into the albumin fusion
protein of the invention.
[0131] Albumin fusion proteins of the invention with "prolonged" or
"extended" shelf-life exhibit greater therapeutic activity relative
to a standard that has been subjected to the same storage and
handling conditions. The standard may be the unfused full-length
Therapeutic protein. When the Therapeutic protein portion of the
albumin fusion protein is an analog, a variant, or is otherwise
altered or does not include the complete sequence for that protein,
the prolongation of therapeutic activity may alternatively be
compared to the unfused equivalent of that analog, variant, altered
peptide or incomplete sequence. As an example, an albumin fusion
protein of the invention may retain greater than about 100% of the
therapeutic activity, or greater than about 105%, 110%, 120%, 130%,
150% or 200% of the therapeutic activity of a standard when
subjected to the same storage and handling conditions as the
standard when compared at a given time point.
[0132] Shelf-life may also be assessed in terms of therapeutic
activity remaining after storage, normalized to therapeutic
activity when storage began. Albumin fusion proteins of the
invention with prolonged or extended shelf-life as exhibited by
prolonged or extended therapeutic activity may retain greater than
about 50% of the therapeutic activity, about 60%, 70%, 80%, or 90%
or more of the therapeutic activity of the equivalent unfused
Therapeutic protein when subjected to the same conditions. For
example, as discussed in Example 1, an albumin fusion protein of
the invention comprising hGH fused to the full length HA sequence
may retain about 80% or more of its original activity in solution
for periods of up to 5 weeks or more under various temperature
conditions.
Expression of Fusion Proteins
[0133] The albumin fusion proteins of the invention may be produced
as recombinant molecules by secretion from yeast, a microorganism
such as a bacterium, or a human or animal cell line. Preferably,
the polypeptide is secreted from the host cells. We have found
that, by fusing the hGH coding sequence to the HA coding sequence,
either to the 5' end or 3' end, it is possible to secrete the
albumin fusion protein from yeast without the requirement for a
yeast-derived pro sequence. This was surprising, as other workers
have found that a yeast derived pro sequence was needed for
efficient secretion of hGH in yeast.
[0134] For example, Hiramatsu et al. (Appl Environ Microbiol
56:2125 (1990); Appl Environ Microbiol 57:2052 (1991)) found that
the N-terminal portion of the pro sequence in the Mucor pusillus
rennin pre-pro leader was important. Other authors, using the
MF.alpha.-1 signal, have always included the MF.alpha.-1 pro
sequence when secreting hGH. The pro sequences were believed to
assist in the folding of the hGH by acting as an intramolecular
chaperone. The present invention shows that HA or fragments of HA
can perform a similar function.
[0135] Hence, a particular embodiment of the invention comprises a
DNA construct encoding a signal sequence effective for directing
secretion in yeast, particularly a yeast-derived signal sequence
(especially one which is homologous to the yeast host), and the
fused molecule of the first aspect of the invention, there being no
yeast-derived pro sequence between the signal and the mature
polypeptide.
[0136] The Saccharomyces cerevisiae invertase signal is a preferred
example of a yeast-derived signal sequence.
[0137] Conjugates of the kind prepared by Poznansky et al., (1-EBS
Lett. 239:18 (1988)), in which separately-prepared polypeptides are
joined by chemical cross-linking, are not contemplated.
[0138] The present invention also includes a cell, preferably a
yeast cell transformed to express an albumin fusion protein of the
invention. In addition to the transformed host cells themselves,
the present invention also contemplates a culture of those cells,
preferably a monoclonal (clonally homogeneous) culture, or a
culture derived from a monoclonal culture, in a nutrient medium. If
the polypeptide is secreted, the medium will contain the
polypeptide, with the cells, or without the cells if they have been
filtered or centrifuged away. Many expression systems are known and
may be used, including bacteria (for example E. coli and Bacillus
subtilis), yeasts (for example Saccharomyces cerevisiae,
Kluyveromyces lactis and Pichia pastoris, filamentous fungi (for
example Aspergillus), plant cells, animal cells and insect
cells.
[0139] Preferred yeast strains to be used in the production of
albumin fusion proteins are D88, DXY1 and BXP10. D88 [leu2-3,
leu2-122, can1, pra1, ubc4] is a derivative of parent strain
AH22his.sup.+ (also known as DB1; see, e.g., Sleep et al.
Biotechnology 8:42-46 (1990)). The strain contains a leu2 mutation
which allows for auxotropic selection of 2 micron-based plasmids
that contain the LEU2 gene. D88 also exhibits a derepression of PRB
1 in glucose excess. The PRB 1 promoter is normally controlled by
two checkpoints that monitor glucose levels and growth stage. The
promoter is activated in wild type yeast upon glucose depletion and
entry into stationary phase. Strain D88 exhibits the repression by
glucose but maintains the induction upon entry into stationary
phase. The PRA1 gene encodes a yeast vacuolar protease, YscA
endoprotease A, that is localized in the ER. The UBC4 gene is in
the ubiquitination pathway and is involved in targeting short lived
and abnotuial proteins for ubiquitin dependant degradation.
Isolation of this ubc4 mutation was found to increase the copy
number of an expression plasmid in the cell and cause an increased
level of expression of a desired protein expressed from the plasmid
(see, e.g., International Publication No. WO99/00504, hereby
incorporated in its entirety by reference herein).
[0140] DXY1, a derivative of D88, has the following genotype:
[leu2-3, leu2-122, car1, pra1, ubc4, ura3::yap3]. In addition to
the mutations isolated in D88, this strain also has a knockout of
the YAP3 protease. This protease causes cleavage of mostly di-basic
residues (RR, RK, KR, KK) but can also promote cleavage at single
basic residues in proteins. Isolation of this yap3 mutation
resulted in higher levels of full length HSA production (see, e.g.,
U.S. Pat. No. 5,965,386, hereby incorporated in its entirety by
reference herein, and Kerry-Williams et al., Yeast 14:161-169
(1998), hereby incorporated in their entireties by reference
herein).
[0141] BXP10 has the following genotype: leu2-3, leu2-122, can1,
pra1, ubc4, ura3, yap3::URA3, lys2, hsp150::LYS2, pmt1::URA3. In
addition to the mutations isolated in DXY1, this strain also has a
knockout of the PMT1 gene and the HSP150 gene. The PMT1 gene is a
member of the evolutionarily conserved family of
dolichyl-phosphate-D-mannose protein 0-mannosyltransferases (Pmts).
The transmembrane topology of Pmt1p suggests that it is an integral
membrane protein of the endoplasmic reticulum with a role in
O-linked glycosylation. This mutation serves to reduce/eliminate
O-linked glycosylation of HSA fusions (see, e.g., International
Publication No. WO00/44772, hereby incorporated in its entirety by
reference herein). Studies revealed that the Hsp150 protein is
inefficiently separated from rHA by ion exchange chromatography.
The mutation in the HSP150 gene removes a potential contaminant
that has proven difficult to remove by standard purification
techniques. See, e.g., U.S. Pat. No. 5,783,423, hereby incorporated
in its entirety by reference herein.
[0142] The desired protein is produced in conventional ways, for
example from a coding sequence inserted in the host chromosome or
on a free plasmid. The yeasts are transformed with a coding
sequence for the desired protein in any of the usual ways, for
example electroporation. Methods for transformation of yeast by
electroporation are disclosed in Becker & Guarente (1990)
Methods Enzymol. 194, 182.
[0143] Successfully transformed cells, i.e., cells that contain a
DNA construct of the present invention, can be identified by well
known techniques. For example, cells resulting from the
introduction of an expression construct can be grown to produce the
desired polypeptide. Cells can be harvested and lysed and their DNA
content examined for the presence of the DNA using a method such as
that described by Southern (1975) J. Mol. Biol. 98, 503 or Berent
et al. (1985) Biotech. 3, 208. Alternatively, the presence of the
protein in the supernatant can be detected using antibodies.
[0144] Useful yeast plasmid vectors include pRS403-406 and
pRS413-416 and are generally available from Stratagene Cloning
Systems, La Jolla, Calif. 92037, USA. Plasmids pRS403, pRS404,
pRS405 and pRS406 are Yeast Integrating plasmids (YIps) and
incorporate the yeast selectable markers HISS, 7RP1, LEU2 and URA3.
Plasmids pRS413-416 are Yeast Centromere plasmids (Ycps).
[0145] Preferred vectors for making albumin fusion proteins for
expression in yeast include pPPC0005, pScCHSA, pScNHSA, and pC4:HSA
which are described in detail in Example 2. FIG. 4 shows a map of
the pPPC0005 plasmid that can be used as the base vector into which
polynucleotides encoding Therapeutic proteins may be cloned to form
HA-fusions. It contains a PRB1 S. cerevisiae promoter (PRB1p), a
Fusion leader sequence (FL), DNA encoding HA (rHA) and an ADH1 S.
cerevisiae terminator sequence. The sequence of the fusion leader
sequence consists of the first 19 amino acids of the signal peptide
of human serum albumin (SEQ ID NO:29) and the last five amino acids
of the mating factor alpha 1 promoter (SLDKR, see EP-A-387 319
which is hereby incorporated by reference in its entirety.
[0146] The plasmids, pPPC0005, pScCHSA, pScNHSA, and pC4:HSA were
deposited on Apr. 11, 2001 at the American Type Culture Collection,
10801 University Boulevard, Manassas, Va. 20110-2209, and given
accession numbers ATCC ______, and ______, respectively. Another
vector useful for expressing an albumin fusion protein in yeast the
pSAC35 vector which is described in Sleep et al., BioTechnology
8:42 (1990) which is hereby incorporated by reference in its
entirety.
[0147] A variety of methods have been developed to operably link
DNA to vectors via complementary cohesive termini. For instance,
complementary homopolymer tracts can be added to the DNA segment to
be inserted to the vector DNA. The vector and DNA segment are then
joined by hydrogen bonding between the complementary homopolymeric
tails to form recombinant DNA molecules.
[0148] Synthetic linkers containing one or more restriction sites
provide an alternative method of joining the DNA segment to
vectors. The DNA segment, generated by endonuclease restriction
digestion, is treated with bacteriophage T4 DNA polymerase or E.
coli DNA polymerase I, enzymes that remove protruding,
.gamma.-single-stranded termini with their 3' 5'-exonucleolytic
activities, and fill in recessed 3'-ends with their polymerizing
activities.
[0149] The combination of these activities therefore generates
blunt-ended DNA segments. The blunt-ended segments are then
incubated with a large molar excess of linker molecules in the
presence of an enzyme that is able to catalyze the ligation of
blunt-ended DNA molecules, such as bacteriophage T4 DNA ligase.
Thus, the products of the reaction are DNA segments carrying
polymeric linker sequences at their ends. These DNA segments are
then cleaved with the appropriate restriction enzyme and ligated to
an expression vector that has been cleaved with an enzyme that
produces termini compatible with those of the DNA segment.
[0150] Synthetic linkers containing a variety of restriction
endonuclease sites are commercially available from a number of
sources including International Biotechnologies Inc, New Haven,
Conn., USA.
[0151] A desirable way to modify the DNA in accordance with the
invention, if, for example, HA variants are to be prepared, is to
use the polymerase chain reaction as disclosed by Saiki et al.
(1988) Science 239, 487-491. In this method the DNA to be
enzymatically amplified is flanked by two specific oligonucleotide
primers which themselves become incorporated into the amplified
DNA. The specific primers may contain restriction endonuclease
recognition sites which can be used for cloning into expression
vectors using methods known in the art.
[0152] Exemplary genera of yeast contemplated to be useful in the
practice of the present invention as hosts for expressing the
albumin fusion proteins are Pichia (formerly classified as
Hansenula), Saccharomyces, Kluyveromyces, Aspergillus, Candida,
Torulopsis, Torulaspora, Schizosaccharomyces, Citeromyces,
Pachysolen, Zygosaccharomyces, Debaromyces, Trichoderma,
Cephalosporium, Humicola, Mucor, Neurospora, Yarrowia,
Metschunikowia, Rhodosporidium, Leucosporidium, Botryoascus,
Sporidiobolus, Endomycopsis, and the like. Preferred genera are
those selected from the group consisting of Saccharomyces,
Schizosaccharomyces, Kluyveromyces, Pichia and Torulaspora.
Examples of Saccharomyces spp. are S. cerevisiae, S. italicus and
S. rouxii.
[0153] Examples of Kluyveromyces spp. are K. fragilis, K. lactis
and K. marxianus. A suitable Torulaspora species is T. delbrueckii.
Examples of Pichia (Hansenula) spp. are P. angusta (formerly H.
polymorpha), P. anomala (formerly H. anomala) and P. pastoris.
Methods for the transformation of S. cerevisiae are taught
generally in EP 251 744, EP 258 067 and WO 90/01063, all of which
are incorporated herein by reference.
[0154] Preferred exemplary species of Saccharomyces include S.
cerevisiae, S. italicus, S. diastaticus, and Zygosaccharomyces
rouxii. Preferred exemplary species of Kluyveromyces include K.
fragilis and K. lactis. Preferred exemplary species of Hansenula
include H. polymorpha (now Pichia angusta), H. anomala (now Pichia
anomala), and Pichia capsulata.Additional preferred exemplary
species of Pichia include P. pastoris. Preferred exemplary species
of Aspergillus include A. niger and A. nidulans. Preferred
exemplary species of Yarrowia include Y. lipolytica. Many preferred
yeast species are available from the ATCC. For example, the
following preferred yeast species are available from the ATCC and
are useful in the expression of albumin fusion proteins:
Saccharomyces cerevisiae Hansen, teleomorph strain BY4743 yap3
mutant (ATCC Accession No. 4022731); Saccharomyces cerevisiae
Hansen, teleomorph strain BY4743 hsp150 mutant (ATCC Accession No.
4021266); Saccharomyces cerevisiae Hansen, teleomorph strain BY4743
pmt1 mutant (ATCC Accession No. 4023792); Saccharomyces cerevisiae
Hansen, teleomorph (ATCC Accession Nos. 20626; 44773; 44774; and
62995); Saccharomyces diastaticus Andrews et Gilliland ex van der
Walt, teleomorph (ATCC Accession No. 62987); Kluyveromyces lactis
(Dombrowski) van der Walt, teleomorph (ATCC Accession No. 76492);
Pichia angusta (Teunisson et al.) Kurtzman, teleomorph deposited as
Hansenula polymorpha de Morais et Maia, teleomorph (ATCC Accession
No. 26012); Aspergillus niger van Tieghem, anamorph (ATCC Accession
No. 9029); Aspergillus niger van Tieghem, anamorph (ATCC Accession
No. 16404); Aspergillus nidulans (Eidam) Winter, anamorph (ATCC
Accession No. 48756); and Yarrowia lipolytica (Wickerham et al.)
van der Walt et von Arx, teleomorph (ATCC Accession No.
201847).
[0155] Suitable promoters for S. cerevisiae include those
associated with the PGKI gene, GAL1 or GAL10 genes, CYCI, PHO5,
TRP1, ADH1, ADH2, the genes for glyceraldehyde-3-phosphate
dehydrogenase, hexokinase, pyruvate decarboxylase,
phosphofructokinase, triose phosphate isomerase, phosphoglucose
isomerase, glucokinase, alpha-mating factor pheromone, [a mating
factor pheromone], the PRB1 promoter, the GUT2 promoter, the GPDI
promoter, and hybrid promoters involving hybrids of parts of 5'
regulatory regions with parts of 5' regulatory regions of other
promoters or with upstream activation sites (e.g. the promoter of
EP-A-258 067).
[0156] Convenient regulatable promoters for use in
Schizosaccharomyces pombe are the thiamine-repressible promoter
from the nmt gene as described by Maundrell (1990) J. Biol. Chem.
265, 10857-10864 and the glucose repressible jbpl gene promoter as
described by Hoffman & Winston (1990) Genetics 124,
807-816.
[0157] Methods of transforming Pichia for expression of foreign
genes are taught in, for example, Cregg et al. (1993), and various
Phillips patents (e.g. U.S. Pat. No. 4,857,467, incorporated herein
by reference), and Pichia expression kits are commercially
available from Invitrogen BV, Leek, Netherlands, and Invitrogen
Corp., San Diego, Calif. Suitable promoters include AOXI and AOX2.
Gleeson et al. (1986) J. Gen. Microbiol. 132, 3459-3465 include
information on Hansenula vectors and transformation, suitable
promoters being MOX1 and FMD1; whilst EP 361 991, Fleer et al.
(1991) and other- publications from Rhone-Poulenc Rorer teach how
to express foreign proteins in Kluyveromyces spp., a suitable
promoter being PGKI.
[0158] The transcription termination signal is preferably the 3'
flanking sequence of a eukaryotic gene which contains proper
signals for transcription termination and polyadenylation. Suitable
3' flanking sequences may, for example, be those of the gene
naturally linked to the expression control sequence used, i.e. may
correspond to the promoter. Alternatively, they may be different in
which case the termination signal of the S. cerevisiae ADH1 gene is
preferred.
[0159] The desired albumin fusion protein may be initially
expressed with a secretion leader sequence, which may be any leader
effective in the yeast chosen. Leaders useful in S. cerevisiae
include that from the mating factor .alpha. polypeptide
(MF.alpha.-1) and the hybrid leaders of EP-A-387 319. Such leaders
(or signals) are cleaved by the yeast before the mature albumin is
released into the surrounding medium. Further such leaders include
those of S. cerevisiae invertase (SUC2) disclosed in JP 62-096086
(granted as 911036516), acid phosphatase (PHO5), the pre-sequence
of MF.alpha.-1, 0 glucanase (BGL2) and killer toxin; S. diastaticus
glucoarnylase II; S. carlsbergensis .alpha.-galactosidase (MEL1);
K. lactis killer toxin; and Candida glucoarnylase.
Additional Methods of Recombinant and Synthetic Production of
Albumin Fusion Proteins
[0160] The present invention also relates to vectors containing a
polynucleotide encoding an albumin fusion protein of the present
invention, host cells, and the production of albumin fusion
proteins by synthetic and recombinant techniques. The vector may
be, for example, a phage, plasmid, viral, or retroviral vector.
Retroviral vectors may be replication competent or replication
defective. In the latter case, viral propagation generally will
occur only in complementing host cells.
[0161] The polynucleotides encoding albumin fusion proteins of the
invention may be joined to a vector containing a selectable marker
for propagation in a host. Generally, a plasmid vector is
introduced in a precipitate, such as a calcium phosphate
precipitate, or in a complex with a charged lipid. If the vector is
a virus, it may be packaged in vitro using an appropriate packaging
cell line and then transduced into host cells.
[0162] The polynucleotide insert should be operatively linked to an
appropriate promoter, such as the phage lambda PL promoter, the E.
coli lac, trp, phoA and tac promoters, the SV40 early and late
promoters and promoters of retroviral LTRs, to name a few. Other
suitable promoters will be known to the skilled artisan. The
expression constructs will further contain sites for transcription
initiation, termination, and, in the transcribed region, a ribosome
binding site for translation. The coding portion of the transcripts
expressed by the constructs will preferably include a translation
initiating codon at the beginning and a termination codon (UAA, UGA
or UAG) appropriately positioned at the end of the polypeptide to
be translated.
[0163] As indicated, the expression vectors will preferably include
at least one selectable marker. Such markers include dihydrofolate
reductase, G418, glutamine synthase, or neomycin resistance for
eukaryotic cell culture, and tetracycline, kanamycin or ampicillin
resistance genes for culturing in E. coli and other bacteria.
Representative examples of appropriate hosts include, but are not
limited to, bacterial cells, such as E. coli, Streptomyces and
Salmonella typhimurium cells; fungal cells, such as yeast cells
(e.g., Saccharomyces cerevisiae or Pichia pastoris (ATCC Accession
No. 201178)); insect cells such as Drosophila S2 and Spodoptera Sf9
cells; animal cells such as CHO, COS,NSO, 293, and Bowes melanoma
cells; and plant cells. Appropriate culture mediums and conditions
for the above-described host cells are known in the art.
[0164] Among vectors preferred for use in bacteria include pQE70,
pQE60 and pQE-9, available from QIAGEN, Inc.; pBluescript vectors,
Phagescript vectors, pNH8A, pNH16a, pNH18A, pNH46A, available from
Stratagene Cloning Systems, Inc.; and ptrc99a, pKK223-3, pKK233-3,
pDR540, pRIT5 available from Pharmacia Biotech, Inc. Among
preferred eukaryotic vectors are pWLNEO, pSV2CAT, p0044, pXT1 and
pSG available from Stratagene; and pSVK3, pBPV, pMSG and pSVL
available from Pharmacia. Preferred expression vectors for use in
yeast systems include, but are not limited to pYES2, pYD1,
pTEF1/Zeo, pYES2/GS, pPICZ, pGAPZ, pGAPZalph, pPIC9, pPIC3.5,
pHIL-D2, pHIL-S1, pPIC3.5K, pPIC9K, and PA0815 (all available from
Invitrogen, Carlbad, Calif.). Other suitable vectors will be
readily apparent to the skilled artisan.
[0165] In one embodiment, polynucleotides encoding an albumin
fusion protein of the invention may be fused to signal sequences
which will direct the localization of a protein of the invention to
particular compartments of a prokaryotic or eukaryotic cell and/or
direct the secretion of a protein of the invention from a
prokaryotic or eukaryotic cell. For example, in E. coli, one may
wish to direct the expression of the protein to the periplasmic
space. Examples of signal sequences or proteins (or fragments
thereof) to which the albumin fusion proteins of the invention may
be fused in order to direct the expression of the polypeptide to
the periplasmic space of bacteria include, but are not limited to,
the pelB signal sequence, the maltose binding protein (MBP) signal
sequence, MBP, the ompA signal sequence, the signal sequence of the
periplasmic E. coli heat-labile enterotoxin B-subunit, and the
signal sequence of alkaline phosphatase. Several vectors are
commercially available for the construction of fusion proteins
which will direct the localization of a protein, such as the pMAL
series of vectors (particularly the pMAL-p series) available from
New England Biolabs. In a specific embodiment, polynucleotides
albumin fusion proteins of the invention may be fused to the pelB
pectate lyase signal sequence to increase the efficiency of
expression and purification of such polypeptides in Gram-negative
bacteria. See, U.S. Pat. Nos. 5,576,195 and 5,846,818, the contents
of which are herein incorporated by reference in their
entireties.
[0166] Examples of signal peptides that may be fused to an albumin
fusion protein of the invention in order to direct its secretion in
mammalian cells include, but are not limited to, the MPIF-1 signal
sequence (e.g., amino acids 1-21 of GenBank Accession number
AAB51134), the stanniocalcin signal sequence (MLQNSAVLLLLVISASA,
SEQ ID N0:34), and a consensus signal sequence
(MPTWAWWLFLVLLLALWAPARG, SEQ ID NO:35). A suitable signal sequence
that may be used in conjunction with baculoviral expression systems
is the gp67 signal sequence (e.g., amino acids 1-19 of GenBank
Accession Number AAA72759).
[0167] Vectors which use glutamine synthase (GS) or DHFR as the
selectable markers can be amplified in the presence of the drugs
methionine sulphoximine or methotrexate, respectively. An advantage
of glutamine synthase based vectors are the availabilty of cell
lines (e.g., the murine myeloma cell line, NSO) which are glutamine
synthase negative. Glutamine synthase expression systems can also
function in glutamine synthase expressing cells (e.g., Chinese
Hamster Ovary (CHO) cells) by providing additional inhibitor to
prevent the functioning of the endogenous gene. A glutamine
synthase expression system and components thereof are detailed in
ft 1 publications: WO87/04462; WO86/05807; WO89/01036; WO89/10404;
and WO91/06657, which are hereby incorporated in their entireties
by reference herein. Additionally, glutamine synthase expression
vectors can be obtained from Lonza Biologics, Inc. (Portsmouth,
N.H.). Expression and production of monoclonal antibodies using a
GS expression system in murine myeloma cells is described in
Bebbington et al., Bio/technology 10:169(1992) and in Biblia and
Robinson Biotechnol. Prog. 11:1 (1995) which are herein
incorporated by reference.
[0168] The present invention also relates to host cells containing
the above-described vector constructs described herein, and
additionally encompasses host cells containing nucleotide sequences
of the invention that are operably associated with one or more
heterologous control regions (e.g., promoter and/or enhancer) using
techniques known of in the art. The host cell can be a higher
eukaryotic cell, such as a mammalian cell (e.g., a human derived
cell), or a lower eukaryotic cell, such as a yeast cell, or the
host cell can be a prokaryotic cell, such as a bacterial cell. A
host strain may be chosen which modulates the expression of the
inserted gene sequences, or modifies and processes the gene product
in the specific fashion desired. Expression from certain promoters
can be elevated in the presence of certain inducers; thus
expression of the genetically engineered polypeptide may be
controlled. Furthermore, different host cells have characteristics
and specific mechanisms for the translational and
post-translational processing and modification (e.g.,
phosphorylation, cleavage) of proteins. Appropriate cell lines can
be chosen to ensure the desired modifications and processing of the
foreign protein expressed.
[0169] Introduction of the nucleic acids and nucleic acid
constructs of the invention into the host cell can be effected by
calcium phosphate transfection, DEAE-dextran mediated transfection,
cationic lipid-mediated transfection, electroporation,
transduction, infection, or other methods. Such methods are
described in many standard laboratory manuals, such as Davis et
al., Basic Methods In Molecular Biology (1986). It is specifically
contemplated that the polypeptides of the present invention may in
fact be expressed by a host cell lacking a recombinant vector.
[0170] In addition to encompassing host cells containing the vector
constructs discussed herein, the invention also encompasses
primary, secondary, and immortalized host cells of vertebrate
origin, particularly mammalian origin, that have been engineered to
delete or replace endogenous genetic material (e.g., the coding
sequence corresponding to a Therapeutic protein may be replaced
with an albumin fusion protein corresponding to the Therapeutic
protein), and/or to include genetic material (e.g., heterologous
polynucleotide sequences such as for example, an albumin fusion
protein of the invention corresponding to the Therapeutic protein
may be included). The genetic material operably associated with the
endogenous polynucleotide may activate, alter, and/or amplify
endogenous polynucleotides.
[0171] In addition, techniques known in the art may be used to
operably associate heterologous polynucleotides (e.g.,
polynucleotides encoding an albumin protein, or a fragment or
variant thereof) and/or heterologous control regions (e.g.,
promoter and/or enhancer) with endogenous polynucleotide sequences
encoding a Therapeutic protein via homologous recombination (see,
e.g., U.S. Pat. No. 5,641,670, issued Jun. 24, 1997; International
Publication Number WO 96/29411; International Publication Number WO
94/12650; Koller et al., Proc. Natl. Acad. Sci. USA 86:8932-8935
(1989); and Zijlstra et al., Nature 342:435-438 (1989), the
disclosures of each of which are incorporated by reference in their
entireties).
[0172] Albumin fusion proteins of the invention can be recovered
and purified from recombinant cell cultures by well-known methods
including ammonium sulfate or ethanol precipitation, acid
extraction, anion or cation exchange chromatography,
phosphocellulose chromatography, hydrophobic interaction
chromatography, affinity chromatography, hydroxylapatite
chromatography, hydrophobic charge interaction chromatography and
lectin chromatography. Most preferably, high performance liquid
chromatography ("HPLC") is employed for purification.
[0173] In preferred embodiments the albumin fusion proteins of the
invention are purified using Anion Exchange Chromatography
including, but not limited to, chromatography on Q-sepharose, DEAE
sepharose, poros HQ, poros DEAE, Toyopearl Q, Toyopearl QAE,
Toyopearl DEAE, Resource/Source Q and DEAE, Fractogel Q and DEAE
columns.
[0174] In specific embodiments the albumin fusion proteins of the
invention are purified using Cation Exchange Chromatography
including, but not limited to, SP-sepharose, CM sepharose, poros
HS, poros CM, Toyopearl SP, Toyopearl CM, Resource/Source S and CM,
Fractogel S and CM columns and their equivalents and
comparables.
[0175] In specific embodiments the albumin fusion proteins of the
invention are purified using Hydrophobic Interaction Chromatography
including, but not limited to, Phenyl, Butyl, Methyl, Octyl,
Hexyl-sepharose, poros Phenyl, Butyl, Methyl, Octyl, Hexyl ,
Toyopearl Phenyl, Butyl, Methyl, Octyl, Hexyl Resource/Source
Phenyl, Butyl, Methyl, Octyl, Hexyl, Fractogel Phenyl, Butyl,
Methyl, Octyl, Hexyl columns and their equivalents and
comparables.
[0176] In specific embodiments the albumin fusion proteins of the
invention are purified using Size Exclusion Chromatography
including, but not limited to, sepharose S100, S200, S300, superdex
resin columns and their equivalents and comparables.
[0177] In specific embodiments the albumin fusion proteins of the
invention are purified using Affinity Chromatography including, but
not limited to, Mimetic Dye affinity, peptide affinity and antibody
affinity columns that are selective for either the HSA or the
"fusion target" molecules.
[0178] In preferred embodiments albumin fusion proteins of the
invention are purified using one or more Chromatography methods
listed above. In other preferred embodiments, albumin fusion
proteins of the invention are purified using one or more of the
following Chromatography columns, Q sepharose FF column, SP
Sepharose FF column, Q Sepharose High Performance Column, Blue
Sepharose FF column, Blue Column, Phenyl Sepharose FF column, DEAE
Sepharose FF, or Methyl Column.
[0179] Additionally, albumin fusion proteins of the invention may
be purified using the process described in International
Publication No. WO00/44772 which is herein incorporated by
reference in its entirety. One of skill in the art could easily
modify the process described therein for use in the purification of
albumin fusion proteins of the invention.
[0180] Albumin fusion proteins of the present invention may be
recovered from: products of chemical synthetic procedures; and
products produced by recombinant techniques from a prokaryotic or
eukaryotic host, including, for example, bacterial, yeast, higher
plant, insect, and mammalian cells. Depending upon the host
employed in a recombinant production procedure, the polypeptides of
the present invention may be glycosylated or may be
non-glycosylated. In addition, albumin fusion proteins of the
invention may also include an initial modified methionine residue,
in some cases as a result of host-mediated processes. Thus, it is
well known in the art that the N-terminal methionine encoded by the
translation initiation codon generally is removed with high
efficiency from any protein after translation in all eukaryotic
cells. While the N-teiiiiinal methionine on most proteins also is
efficiently removed in most prokaryotes, for some proteins, this
prokaryotic removal process is inefficient, depending on the nature
of the amino acid to which the N-terminal methionine is covalently
linked.
[0181] In one embodiment, the yeast Pichia pastoris is used to
express albumin fusion proteins of the invention in a eukaryotic
system. Pichia pastoris is a methylotrophic yeast which can
metabolize methanol as its sole carbon source. A main step in the
methanol metabolization pathway is the oxidation of methanol to
formaldehyde using O.sub.2. This reaction is catalyzed by the
enzyme alcohol oxidase. In order to metabolize methanol as its sole
carbon source, Pichia pastoris must generate high levels of alcohol
oxidase due, in part, to the relatively low affinity of alcohol
oxidase for O.sub.2. Consequently, in a growth medium depending on
methanol as a main carbon source, the promoter region of one of the
two alcohol oxidase genes (AOX1) is highly active. In the presence
of methanol, alcohol oxidase produced from the AOX1 gene comprises
up to approximately 30% of the total soluble protein in Pichia
pastoris. See Ellis, S. B., et al., Mol. Cell. Biol. 5:1111-21
(1985); Koutz, P. J, et al., Yeast 5:167-77 (1989); Tschopp, J. F.,
et al., Nucl. Acids Res. 15:3859-76 (1987). Thus, a heterologous
coding sequence, such as, for example, a polynucleotide of the
present invention, under the transcriptional regulation of all or
part of the AOX1 regulatory sequence is expressed at exceptionally
high levels in Pichia yeast grown in the presence of methanol.
[0182] In one example, the plasmid vector pPIC9K is used to express
DNA encoding an albumin fusion protein of the invention, as set
forth herein, in a Pichea yeast system essentially as described in
"Pichia Protocols: Methods in Molecular Biology," D. R. Higgins and
J. Gregg, eds. The Humana Press, Totowa, N.J., 1998. This
expression vector allows expression and secretion of a polypeptide
of the invention by virtue of the strong AOX1 promoter linked to
the Pichia pastoris alkaline phosphatase (PHO) secretory signal
peptide (i.e., leader) located upstream of a multiple cloning
site.
[0183] Many other yeast vectors could be used in place of pPIC9K,
such as, pYES2, pYD1, pTEF1/Zeo, pYES2/GS, pPICZ, pGAPZ,
pGAPZalpha, pPIC9, pPIC3.5, pHIL-D2, pHIL-S1, pPIC3.5K, and PA0815,
as one skilled in the art would readily appreciate, as long as the
proposed expression construct provides appropriately located
signals for transcription, translation, secretion (if desired), and
the like, including an in-frame AUG as required.
[0184] In another embodiment, high-level expression of a
heterologous coding sequence, such as, for example, a
polynucleotide encoding an albumin fusion protein of the present
invention, may be achieved by cloning the heterologous
polynucleotide of the invention into an expression vector such as,
for example, pGAPZ or pGAPZalpha, and growing the yeast culture in
the absence of methanol.
[0185] In addition, albumin fusion proteins of the invention can be
chemically synthesized using techniques known in the art (e.g., see
Creighton, 1983, Proteins: Structures and Molecular Principles,
W.H. Freeman & Co., N.Y., and Hunkapiller et al., Nature,
310:105-111 (1984)). For example, a polypeptide corresponding to a
fragment of a polypeptide can be synthesized by use of a peptide
synthesizer. Furthermore, if desired, nonclassical amino acids or
chemical amino acid analogs can be introduced as a substitution or
addition into the polypeptide sequence. Non-classical amino acids
include, but are not limited to, to the D-isomers of the common
amino acids, 2,4-diaminobutyric acid, .alpha.-amino isobutyric
acid, 4-aminobutyric acid, Abu, 2-amino butyric acid, g-Abu, e-Ahx,
6-amino hexanoic acid, Aib, 2-amino isobutyric acid, 3-amino
propionic acid, ornithine, norleucine, norvaline, hydroxyproline,
sarcosine, citrulline, homocitrulline, cysteic acid,
t-butylglycine, t-butylalanine, phenylglycine, cyclohexylalanine,
b-alanine, fluoro-amino acids, designer amino acids such as
b-methyl amino acids, Ca-methyl amino acids, Na-methyl amino acids,
and amino acid analogs in general. Furthermore, the amino acid can
be D (dextrorotary) or L (levorotary).
[0186] The invention encompasses albumin fusion proteins of the
present invention which are differentially modified during or after
translation, e.g., by glycosylation, acetylation, phosphorylation,
amidation, derivatization by known protecting/blocking groups,
proteolytic cleavage, linkage to an antibody molecule or other
cellular ligand, etc. Any of numerous chemical modifications may be
carried out by known techniques, including but not limited, to
specific chemical cleavage by cyanogen bromide, trypsin,
chymotrypsin, papain, V8 protease, NaBH.sub.4; acetylation,
formylation, oxidation, reduction; metabolic synthesis in the
presence of tunicamycin; etc.
[0187] Additional post-translational modifications encompassed by
the invention include, for example, e.g., N-linked or O -linked
carbohydrate chains, processing of N-terminal or C-terminal ends),
attachment of chemical moieties to the amino acid backbone,
chemical modifications of N-linked or O-linked carbohydrate chains,
and addition or deletion of an N-terminal methionine residue as a
result of procaryotic host cell expression. The albumin fusion
proteins may also be modified with a detectable label, such as an
enzymatic, fluorescent, isotopic or affinity label to allow for
detection and isolation of the protein.
[0188] Examples of suitable enzymes include horseradish peroxidase,
alkaline phosphatase, beta-galactosidase, or acetylcholinesterase;
examples of suitable prosthetic group complexes include
streptavidin/biotin and avidin/biotin; examples of suitable
fluorescent materials include umbelliferone, fluorescein,
fluorescein isothiocyanate, rhodamine, dichlorotriazinylamine
fluorescein, dansyl chloride or phycoerythrin; an example of a
luminescent material includes luminol; examples of bioluminescent
materials include luciferase, luciferin, and aequorin; and sulfur
(.sup.35S), tritium (.sup.3H), indium (.sup.111In, .sup.112In,
.sup.113mIn, .sup.115mIn)., technetium (.sup.99Tc, .sup.99mTc),
thallium (.sup.201Ti), gallium (.sup.68Ga, .sup.67Ga), palladium
(.sup.103Pd), molybdenum (.sup.99Mo), xenon (.sup.133Xe), fluorine
(.sup.18F), .sup.153Sm, .sup.177Lu, .sup.159Gd, .sup.149Pm.
.sup.140La, .sup.175Yb, .sup.166Ho, .sup.90Y, .sup.47Sc,
.sup.186Re, .sup.188Re, .sup.142Rh, and .sup.97Ru.
[0189] In specific embodiments, albumin fusion proteins of the
present invention or fragments or variants thereof are attached to
macrocyclic chelators that associate with radiometal ions.,
including but not limited to, .sup.177Lu, .sup.90Y, .sup.166Ho ,
and .sup.153Sm, to polypeptides. In a preferred embodiment, the
radiometal ion associated with the macrocyclic chelators is
.sup.111In. In another preferred embodiment, the radiometal ion
associated with the macrocyclic chelator is .sup.90Y. In specific
embodiments, the macrocyclic chelator is
1,4,7,10-tetraazacyclododecane-N,N',N'',N'''-tetraacetic acid
(DOTA). In other specific embodiments, DOTA is attached to an
antibody of the invention or fragment thereof via linker molecule.
Examples of linker molecules useful for conjugating DOTA to a
polypeptide are commonly known in the art--see, for example,
DeNardo et al., Clin Cancer Res. 4(10):2483-90 (1998); Peterson et
al., Bioconjug. Chem. 10(4):553-7 (1999); and Zimmerman et al,
Nucl. Med. Biol. 26(8):943-50 (1999); which are hereby incorporated
by reference in their entirety.
[0190] As mentioned, the albumin fusion proteins of the invention
may be modified by either natural processes, such as
post-translational processing, or by chemical modification
techniques which are well known in the art. It will be appreciated
that the same type of modification may be present in the same or
varying degrees at several sites in a given polypeptide.
Polypeptides of the invention may be branched, for example, as a
result of ubiquitination, and they may be cyclic, with or without
branching. Cyclic, branched, and branched cyclic polypeptides may
result from posttranslation natural processes or may be made by
synthetic methods. Modifications include acetylation, acylation,
ADP-ribosylation, amidation, covalent attachment of flavin,
covalent attachment of a heme moiety, covalent attachment of a
nucleotide or nucleotide derivative, covalent attachment of a lipid
or lipid derivative, covalent attachment of phosphotidylinositol,
cross-linking, cyclization, disulfide bond formation,
demethylation, formation of covalent cross-links, formation of
cysteine, formation of pyroglutamate, formylation,
gamma-carboxylation, glycosylation, GPI anchor formation,
hydroxylation, iodination, methylation, myristylation, oxidation,
pegylation, proteolytic processing, phosphorylation, prenylation,
racemization, selenoylation, sulfation, transfer-RNA mediated
addition of amino acids to proteins such as arginylation, and
ubiquitination. (See, for instance, PROTEINS--STRUCTURE AND
MOLECULAR PROPERTIES, 2nd Ed., T. E. Creighton, W. H. Freeman and
Company, New York (1993); POST-TRANSLATIONAL COVALENT MODIFICATION
OF PROTEINS, B. C. Johnson, Ed., Academic Press, New York, pgs.
1-12 (1983); Seifter et al., Meth. Enzymol. 182:626-646 (1990);
Rattan et al., Ann. N.Y. Acad. Sci. 663:48-62 (1992)).
[0191] Albumin fusion proteins of the invention and antibodies that
bind a Therapeutic protein or fragments or variants thereof can be
fused to marker sequences, such as a peptide to facilitate
purification. In preferred embodiments, the marker amino acid
sequence is a hexa-histidine peptide, such as the tag provided in a
pQE vector (QIAGEN, Inc., 9259 Eton
[0192] Avenue, Chatsworth, Calif., 91311), among others, many of
which are commercially available. As described in Gentz et al.,
Proc. Natl. Acad. Sci. USA 86:821-824 (1989), for instance,
hexa-histidine provides for convenient purification of the fusion
protein. Other peptide tags useful for purification include, but
are not limited to, the "HA" tag, which corresponds to an epitope
derived from the influenza hemagglutinin protein (Wilson et al.,
Cell 37:767 (1984)) and the "flag" tag.
[0193] Further, an albumin fusion protein of the invention may be
conjugated to a therapeutic moiety such as a cytotoxin, e.g., a
cytostatic or cytocidal agent, a therapeutic agent or a radioactive
metal ion, e.g., alpha-emitters such as, for example, 213Bi. A
cytotoxin or cytotoxic agent includes any agent that is detrimental
to cells. Examples include paclitaxol, cytochalasin B, gramicidin
D, ethidium bromide, emetine, mitomycin, etoposide, tenoposide,
vincristine, vinblastine, colchicin, doxorubicin, daunorubicin,
dihydroxy anthracin dione, mitoxantrone, mithramycin, actinomycin
D, 1-dehydrotestosterone, glucocorticoids, procaine, tetracaine,
lidocaine, propranolol, and puromycin and analogs or homologs
thereof. Therapeutic agents include, but are not limited to,
antimetabolites (e.g., methotrexate, 6-mercaptopurine,
6-thioguanine, cytarabine, 5-fluorouracil decarbazine), alkylating
agents (e.g., mechlorethamine, thioepa chlorambucil, melphalan,
carmustine (BSNU) and lomustine (CCNU), cyclothosphamide, busulfan,
dibromomannitol, streptozotocin, mitomycin C, and cis-
dichlorodiamine platinum (H) (DDP) cisplatin), anthracyclines
(e.g., daunorubicin (formerly daunomycin) and doxorubicin),
antibiotics (e.g., dactinomycin (formerly actinomycin), bleomycin,
mithramycin, and anthramycin (AMC)), and anti-mitotic agents (e.g.,
vincristine and vinblastine).
[0194] The conjugates of the invention can be used for modifying a
given biological response, the therapeutic agent or drug moiety is
not to be construed as limited to classical chemical therapeutic
agents. For example, the drug moiety may be a protein or
polypeptide possessing a desired biological activity. Such proteins
may include, for example, a toxin such as abrin, ricin A,
pseudomonas exotoxin, or diphtheria toxin; a protein such as tumor
necrosis factor, alpha-interferon, .beta.-interferon, nerve growth
factor, platelet derived growth factor, tissue plasminogen
activator, an apoptotic agent, e.g., TNF-alpha, TNF-beta, AIM (See,
International Publication No. WO 97/33899), AIM II (See,
International Publication No. WO 97/34911), Fas Ligand (Takahashi
et al., Int. Immunol., 6:1567-1574 (1994)), VEGI (See,
International Publication No. WO 99/23105), a thrombotic agent or
an anti-angiogenic agent, e.g., angiostatin or endostatin: or,
biological response modifiers such as, for example, lymphokines,
interleukin-1 ("IL-1"), interleukin-2 ("IL-2"), interleukin-6
("IL-6"), granulocyte macrophage colony stimulating factor
("GM-CSF'), granulocyte colony stimulating factor ("G-CSF"), or
other growth factors. Techniques for conjugating such therapeutic
moiety to proteins (e.g., albumin fusion proteins) are well known
in the art.
[0195] Albumin fusion proteins may also be attached to solid
supports, which are particularly useful for immunoassays or
purification of polypeptides that are bound by, that bind to, or
associate with albumin fusion proteins of the invention. Such solid
supports include, but are not limited to, glass, cellulose,
polyacrylamide, nylon, polystyrene, polyvinyl chloride or
polypropylene.
[0196] Albumin fusion proteins, with or without a therapeutic
moiety conjugated to it, administered alone or in combination with
cytotoxic factor(s) and/or cytokine(s) can be used as a
therapeutic.
[0197] Also provided by the invention are chemically modified
derivatives of the albumin fusion proteins of the invention which
may provide additional advantages such as increased solubility,
stability and circulating time of the polypeptide, or decreased
immunogenicity (see U.S. Pat. No. 4,179,337). The chemical moieties
for derivitization may be selected from water soluble polymers such
as polyethylene glycol, ethylene glycol/propylene glycol
copolymers, carboxymethylcellulose, dextran, polyvinyl alcohol and
the like. The albumin fusion proteins may be modified at random
positions within the molecule, or at predetermined positions within
the molecule and may include one, two, three or more attached
chemical moieties.
[0198] The polymer may be of any molecular weight, and may be
branched or unbranched. For polyethylene glycol, the preferred
molecular weight is between about 1 kDa and about 100 kDa (the term
"about" indicating that in preparations of polyethylene glycol,
some molecules will weigh more, some less, than the stated
molecular weight) for ease in handling and manufacturing. Other
sizes may be used, depending on the desired therapeutic profile
(e.g., the duration of sustained release desired, the effects, if
any on biological activity, the ease in handling, the degree or
lack of antigenicity and other known effects of the polyethylene
glycol to a Therapeutic protein or analog). For example, the
polyethylene glycol may have an average molecular weight of about
200, 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000,
5500, 6000, 6500, 7000, 7500, 8000, 8500, 9000, 9500, 10,000,
10,500, 11,000, 11,500, 12,000, 12,500, 13,000, 13,500, 14,000,
14,500, 15,000, 15,500, 16,000, 16,500, 17,000, 17,500, 18,000,
18,500, 19,000, 19,500, 20,000, 25,000, 30,000, 35,000, 40,000,
45,000, 50,000, 55,000, 60,000, 65,000, 70,000, 75,000, 80,000,
85,000, 90,000, 95,000, or 100,000 kDa.
[0199] As noted above, the polyethylene glycol may have a branched
structure. Branched polyethylene glycols are described, for
example, in U.S. Pat. No. 5,643,575; Morpurgo et al., Appl.
Biochem. Biotechnol. 56:59-72 (1996); Vorobjev et al., Nucleosides
Nucleotides 18:2745-2750 (1999); and Caliceti et al., Bioconjug.
Chem. 10:638-646 (1999), the disclosures of each of which are
incorporated herein by reference.
[0200] The polyethylene glycol molecules (or other chemical
moieties) should be attached to the protein with consideration of
effects on functional or antigenic domains of the protein. There
are a number of attachment methods available to those skilled in
the art, such as, for example, the method disclosed in EP 0 401 384
(coupling PEG to G-CSF), herein incorporated by reference; see also
Malik et al., Exp. Hematol. 20:1028-1035 (1992), reporting
pegylation of GM-CSF using tresyl chloride. For example,
polyethylene glycol may be covalently bound through amino acid
residues via reactive group, such as a free amino or carboxyl
group. Reactive groups are those to which an activated polyethylene
glycol molecule may be bound. The amino acid residues having a free
amino group may include lysine residues and the N-terminal amino
acid residues; those having a free carboxyl group may include
aspartic acid residues glutamic acid residues and the C-terminal
amino acid residue. Sulfhydryl groups may also be used as a
reactive group for attaching the polyethylene glycol molecules.
Preferred for therapeutic purposes is attachment at an amino group,
such as attachment at the N-terminus or lysine group.
[0201] As suggested above, polyethylene glycol may be attached to
proteins via linkage to any of a number of amino acid residues. For
example, polyethylene glycol can be linked to proteins via covalent
bonds to lysine, histidine, aspartic acid, glutamic acid, or
cysteine residues. One or more reaction chemistries may be employed
to attach polyethylene glycol to specific amino acid residues
(e.g., lysine, histidine, aspartic acid, glutamic acid, or
cysteine) of the protein or to more than one type of amino acid
residue (e.g., lysine, histidine, aspartic acid, glutamic acid,
cysteine and combinations thereof) of the protein.
[0202] One may specifically desire proteins chemically modified at
the N-terminus. Using polyethylene glycol as an illustration of the
present composition, one may select from a variety of polyethylene
glycol molecules (by molecular weight, branching, etc.), the
proportion of polyethylene glycol molecules to protein
(polypeptide) molecules in the reaction mix, the type of pegylation
reaction to be performed, and the method of obtaining the selected
N-terminally pegylated protein. The method of obtaining the
N-terminally pegylated preparation (i.e., separating this moiety
from other monopegylated moieties if necessary) may be by
purification of the N-terminally pegylated material from a
population of pegylated protein molecules. Selective proteins
chemically modified at the N-terminus modification may be
accomplished by reductive alkylation which exploits differential
reactivity of different types of primary amino groups (lysine
versus the N-terminal) available for derivatization in a particular
protein. Under the appropriate reaction conditions, substantially
selective derivatization of the protein at the N-terminus with a
carbonyl group containing polymer is achieved.
[0203] As indicated above, pegylation of the albumin fusion
proteins of the invention may be accomplished by any number of
means. For example, polyethylene glycol may be attached to the
albumin fusion protein either directly or by an intervening linker.
Linkerless systems for attaching polyethylene glycol to proteins
are described in Delgado et al., Crit. Rev. Thera. Drug Carrier
Sys. 9:249-304 (1992); Francis et al., Intern. J. of Hematol.
68:1-18 (1998); U.S. Pat. No. 4,002,531; U.S. Pat. No. 5,349,052;
WO 95/06058; and WO 98/32466, the disclosures of each of which are
incorporated herein by reference.
[0204] One system for attaching polyethylene glycol directly to
amino acid residues of proteins without an intervening linker
employs tresylated MPEG, which is produced by the modification of
monmethoxy polyethylene glycol (MPEG) using tresylchloride
(ClSO.sub.2CH.sub.2CF.sub.3). Upon reaction of protein with
tresylated MPEG, polyethylene glycol is directly attached to amine
groups of the protein. Thus, the invention includes
protein-polyethylene glycol conjugates produced by reacting
proteins of the invention with a polyethylene glycol molecule
having a 2,2,2-trifluoreothane sulphonyl group.
[0205] Polyethylene glycol can also be attached to proteins using a
number of different intervening linkers. For example, U.S. Pat. No.
5,612,460, the entire disclosure of which is incorporated herein by
reference, discloses urethane linkers for connecting polyethylene
glycol to proteins. Protein-polyethylene glycol conjugates wherein
the polyethylene glycol is attached to the protein by a linker can
also be produced by reaction of proteins with compounds such as
MPEG-succinimidylsuccinate, MPEG activated with
1,1'-carbonyldiimidazole, MPEG-2,4,5-trichloropenylcarbonate,
MPEG-p-nitrophenolcarbonate, and various MPEG-succinate
derivatives. A number of additional polyethylene glycol derivatives
and reaction chemistries for attaching polyethylene glycol to
proteins are described in International Publication No. WO
98/32466, the entire disclosure of which is incorporated herein by
reference. Pegylated protein products produced using the reaction
chemistries set out herein are included within the scope of the
invention.
[0206] The number of polyethylene glycol moieties attached to each
albumin fusion protein of the invention (i.e., the degree of
substitution) may also vary. For example, the pegylated proteins of
the invention may be linked, on average, to 1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 12, 15, 17, 20, or more polyethylene glycol molecules.
Similarly, the average degree of substitution within ranges such as
1-3, 2-4, 3-5, 4-6, 5-7, 6-8, 7-9, 8-10, 9-11, 10-12, 11-13, 12-14,
13-15, 14-16, 15-17, 16-18, 17-19, or 18-20 polyethylene glycol
moieties per protein molecule. Methods for determining the degree
of substitution are discussed, for example, in Delgado et al.,
Crit. Rev. Thera. Drug Carrier Sys. 9:249-304 (1992).
[0207] The polypeptides of the invention can be recovered and
purified from chemical synthesis and recombinant cell cultures by
standard methods which include, but are not limited to, ammonium
sulfate or ethanol precipitation, acid extraction, anion or cation
exchange chromatography, phosphocellulose chromatography,
hydrophobic interaction chromatography, affinity chromatography,
hydroxylapatite chromatography and lectin chromatography. Most
preferably, high performance liquid chromatography ("HPLC") is
employed for purification. Well known techniques for refolding
protein may be employed to regenerate active conformation when the
polypeptide is denatured during isolation and/or purification.
[0208] The presence and quantity of albumin fusion proteins of the
invention may be determined using ELISA, a well known immunoassay
known in the art. In one ELISA protocol that would be useful for
detecting/quantifying albumin fusion proteins of the invention,
comprises the steps of coating an ELISA plate with an anti-human
serum albumin antibody, blocking the plate to prevent non-specific
binding, washing the ELISA plate, adding a solution containing the
albumin fusion protein of the invention (at one or more different
concentrations), adding a secondary anti-Therapeutic protein
specific antibody coupled to a detectable label (as described
herein or otherwise known in the art), and detecting the presence
of the secondary antibody. In an alternate version of this
protocol, the ELISA plate might be coated with the anti-Therapeutic
protein specific antibody and the labeled secondary reagent might
be the anti-human albumin specific antibody.
Uses of the Polynucleotides
[0209] Each of the polynucleotides identified herein can be used in
numerous ways as reagents. The following description should be
considered exemplary and utilizes known techniques.
[0210] The polynucleotides of the present invention are useful to
produce the albumin fusion proteins of the invention. As described
in more detail below, polynucleotides of the invention (encoding
albumin fusion proteins) may be used in recombinant DNA methods
useful in genetic engineering to make cells, cell lines, or tissues
that express the albumin fusion protein encoded by the
polynucleotides encoding albumin fusion proteins of the
invention.
[0211] Polynucleotides of the present invention are also useful in
gene therapy. One goal of gene therapy is to insert a normal gene
into an organism having a defective gene, in an effort to correct
the genetic defect. The polynucleotides disclosed in the present
invention offer a means of targeting such genetic defects in a
highly accurate manner. Another goal is to insert a new gene that
was not present in the host genome, thereby producing a new trait
in the host cell. Additional non-limiting examples of gene therapy
methods encompassed by the present invention are more thoroughly
described elsewhere herein (see, the sections labeled "Gene
Therapy", and Examples 17 and 18).
Uses of the Polypeptides
[0212] Each of the polypeptides identified herein can be used in
numerous ways. The following description should be considered
exemplary and utilizes known techniques.
[0213] Albumin fusion proteins of the invention are useful to
provide immunological probes for differential identification of the
tissue(s) (e.g., immunohistochemistry assays such as, for example,
ABC immunoperoxidase (Hsu et al., J. Histochem. Cytochem.
29:577-580 (1981)) or cell type(s) (e.g., immunocytochemistry
assays).
[0214] Albumin fusion proteins can be used to assay levels of
polypeptides in a biological sample using classical
immunohistological methods known to those of skill in the art
(e.g., see Jalkanen, et al., J. Cell. Biol. 101:976-985 (1985);
Jalkanen, et al., J. Cell. Biol. 105:3087-3096 (1987)). Other
methods useful for detecting protein gene expression include
immunoassays, such as the enzyme linked immunosorbent assay (ELISA)
and the radioimmunoassay (RIA). Suitable assay labels are known in
the art and include enzyme labels, such as, glucose oxidase;
radioisotopees, such as ioldine (.sup.131I, .sup.125I .sup.123I,
.sup.121I), carbon (.sup.14C), sulfur (.sup.35S), tritium
(.sup.3H), indium (.sup.115In, .sup.113mIn, .sup.111In), and
technetium (.sup.99Tc, .sup.99mTc), thallium (.sup.201Ti), gallium
(.sup.68Ga, .sup.67Ga), palladium (.sup.103Pd), molybdenum
(.sup.99Mo), xenon (.sup.133Xe), fluorine (.sup.18F), .sup.153Sm,
.sup.177Lu, .sup.159Gd, .sup.149Pm, .sup.140La, .sup.175Yb,
.sup.166Ho, .sup.90Y, .sup.47Sc, .sup.186Re, .sup.188Re,
.sup.142Pr, .sup.105Rh, .sup.97Ru; luminescent labels, such as
luminol; and fluorescent labels, such as fluorescein and rhodamine,
and biotin.
[0215] Albumin fusion proteins of the invention can also be
detected in vivo by imaging. Labels or markers for in vivo imaging
of protein include those detectable by X-radiography, nuclear
magnetic resonance (NMR) or electron spin relaxtion (ESR). For
X-radiography, suitable labels include radioisotopes such as barium
or cesium, which emit detectable radiation but are not overtly
harmful to the subject. Suitable markers for NMR and ESR include
those with a detectable characteristic spin, such as deuterium,
which may be incorporated into the albumin fusion protein by
labeling of nutrients given to a cell line expressing the albumin
fusion protein of the invention.
[0216] An albumin fusion protein which has been labeled with an
appropriate detectable imaging moiety, such as a radioisotope (for
example, .sup.131I, .sup.112In, .sup.99mTc, (.sup.131I, .sup.125I,
.sup.123I, .sup.121I), carbon (.sup.14C), sulfur (.sup.35S),
tritium (.sup.3H), indium (.sup.115mIn, .sup.113mIn, .sup.112In,
.sup.111In), and technetium (.sup.99Tc, .sup.99mTc), thallium
(.sup.201To), gallium (.sup.68Ga, .sup.67Ga), palladium
(.sup.103Pd), molybdenum (.sup.99Mo), xenon (.sup.133Xe), fluorine
(.sup.18F, .sup.153Sm, .sup.177Lu, .sup.159Gd, .sup.149Pm,
.sup.140La, .sup.175Yb, .sup.166Ho, .sup.90Y, .sup.47Sc,
.sup.186Re, .sup.188Re, .sup.142Pr, .sup.105Rh, .sup.97Ru), a
radio-opaque substance, or a material detectable by nuclear
magnetic resonance, is introduced (for example, parenterally,
subcutaneously or intraperitoneally) into the mammal to be examined
for immune system disorder. It will be understood in the art that
the size of the subject and the imaging system used will determine
the quantity of imaging moiety needed to produce diagnostic images.
In the case of a radioisotope moiety, for a human subject, the
quantity of radioactivity injected will normally range from about 5
to 20 millicuries of .sup.99mTc. The labeled albumin fusion protein
will then preferentially accumulate at locations in the body (e.g.,
organs, cells, extracellular spaces or matrices) where one or more
receptors, ligands or substrates (corresponding to that of the
Therapeutic protein used to make the albumin fusion protein of the
invention) are located. Alternatively, in the case where the
albumin fusion protein comprises at least a fragment or variant of
a Therapeutic antibody, the labeled albumin fusion protein will
then preferentially accumulate at the locations in the body (e.g.,
organs, cells, extracellular spaces or matrices) where the
polypeptides/epitopes corresponding to those bound by the
Therapeutic antibody (used to make the albumin fusion protein of
the invention) are located. In vivo tumor imaging is described in
S. W. Burchiel et al., "Immunopharmacokinetics of Radiolabeled
Antibodies and Their Fragments" (Chapter 13 in Tumor Imaging: The
Radiochemical Detection of Cancer, S. W. Burchiel and B. A. Rhodes,
eds., Masson Publishing Inc. (1982)). The protocols described
therein could easily be modified by one of skill in the art for use
with the albumin fusion proteins of the invention.
[0217] In one embodiment, the invention provides a method for the
specific delivery of albumin fusion proteins of the invention to
cells by administering albumin fusion proteins of the invention
(e.g., polypeptides encoded by polynucleotides encoding albumin
fusion proteins of the invention and/or antibodies) that are
associated with heterologous polypeptides or nucleic acids. In one
example, the invention provides a method for delivering a
Therapeutic protein into the targeted cell. In another example, the
invention provides a method for delivering a single stranded
nucleic acid (e.g., antisense or ribozymes) or double stranded
nucleic acid (e.g., DNA that can integrate into the cell's genome
or replicate episomally and that can be transcribed) into the
targeted cell.
[0218] In another embodiment, the invention provides a method for
the specific destruction of cells (e.g., the destruction of tumor
cells) by administering albumin fusion proteins of the invention in
association with toxins or cytotoxic prodrugs.
[0219] By "toxin" is meant one or more compounds that bind and
activate endogenous cytotoxic effector systems, radioisotopes,
holotoxins, modified toxins, catalytic subunits of toxins, or any
molecules or enzymes not normally present in or on the surface of a
cell that under defined conditions cause the cell's death. Toxins
that may be used according to the methods of the invention include,
but are not limited to, radioisotopes known in the art, compounds
such as, for example, antibodies (or complement fixing containing
portions thereof) that bind an inherent or induced endogenous
cytotoxic effector system, thymidine kinase, endonuclease, RNAse,
alpha toxin, ricin, abrin, Pseudomonas exotoxin A, diphtheria
toxin, saporin, momordin, gelonin, pokeweed antiviral protein,
alpha-sarcin and cholera toxin. "Toxin" also includes a cytostatic
or cytocidal agent, a therapeutic agent or a radioactive metal ion,
e.g., alpha-emitters such as, for example, .sup.213Bi, or other
radioisotopes such as, for example, .sup.103Pd, .sup.133Xe,
.sup.131I, .sup.68Ga, .sup.57Co, .sup.65Zn, .sup.85Sr, .sup.32P,
.sup.35S, .sup.90Y, .sup.153Sm, .sup.153Gd, .sup.169Yb, .sup.51Cr,
.sup.54Mn, .sup.75Se, .sup.113Sn, .sup.90Yttrium, .sup.117Tin,
.sup.186 Rhenium, .sup.166 Holmium, and .sup.189Rhenium;
luminescent labels, such as luminol; and fluorescent labels, such
as fluorescein and rhodamine, and biotin. In a specific embodiment,
the invention provides a method for the specific destruction of
cells (e.g., the destruction of tumor cells) by administering
polypeptides of the invention or antibodies of the invention in
association with the radioisotope .sup.90Y. In another specific
embodiment, the invention provides a method for the specific
destruction of cells (e.g., the destruction of tumor cells) by
administering polypeptides of the invention or antibodies of the
invention in association with the radioisotope .sup.111In. In a
further specific embodiment, the invention provides a method for
the specific destruction of cells (e.g., the destruction of tumor
cells) by administering polypeptides of the invention or antibodies
of the invention in association with the radioisotope
.sup.131I.
[0220] Techniques known in the art may be applied to label
polypeptides of the invention. Such techniques include, but are not
limited to, the use of bifunctional conjugating agents (see e.g.,
U.S. Pat. Nos. 5,756,065; 5,714,631; 5,696,239; 5,652,361;
5,505,931; 5,489,425; 5,435,990; 5,428,139; 5,342,604; 5,274,119;
4,994,560; and 5,808,003; the contents of each of which are hereby
incorporated by reference in its entirety).
[0221] The albumin fusion proteins of the present invention are
useful for diagnosis, treatment, prevention and/or prognosis of
various disorders in mammals, preferably humans. Such disorders
include, but are not limited to, those described herein under the
section heading "Biological Activities," below.
[0222] Thus, the invention provides a diagnostic method of a
disorder, which involves (a) assaying the expression level of a
certain polypeptide in cells or body fluid of an individual using
an albumin fusion protein of the invention; and (b) comparing the
assayed polypeptide expression level with a standard polypeptide
expression level, whereby an increase or decrease in the assayed
polypeptide expression level compared to the standard expression
level is indicative of a disorder. With respect to cancer, the
presence of a relatively high amount of transcript in biopsied
tissue from an individual may indicate a predisposition for the
development of the disease, or may provide a means for detecting
the disease prior to the appearance of actual clinical symptoms. A
more definitive diagnosis of this type may allow health
professionals to employ preventative measures or aggressive
treatment earlier thereby preventing the development or further
progression of the cancer.
[0223] Moreover, albumin fusion proteins of the present invention
can be used to treat or prevent diseases or conditions such as, for
example, neural disorders, immune system disorders, muscular
disorders, reproductive disorders, gastrointestinal disorders,
pulmonary disorders, cardiovascular disorders, renal disorders,
proliferative disorders, and/or cancerous diseases and conditions.
For example, patients can be administered a polypeptide of the
present invention in an effort to replace absent or decreased
levels of the polypeptide (e.g., insulin), to supplement absent or
decreased levels of a different polypeptide (e.g., hemoglobin S for
hemoglobin B, SOD, catalase, DNA repair proteins), to inhibit the
activity of a polypeptide (e.g., an oncogene or tumor supressor),
to activate the activity of a polypeptide (e.g., by binding to a
receptor), to reduce the activity of a membrane bound receptor by
competing with it for free ligand (e.g., soluble TNF receptors used
in reducing inflammation), or to bring about a desired response
(e.g., blood vessel growth inhibition, enhancement of the immune
response to proliferative cells or tissues).
[0224] In particular, albumin fusion proteins comprising of at
least a fragment or variant of a Therapeutic antibody can also be
used to treat disease (as described supra, and elsewhere herein).
For example, administration of an albumin fusion protein comprising
of at least a fragment or variant of a Therapeutic antibody can
bind, and/or neutralize the polypeptide to which the Therapeutic
antibody used to make the albumin fusion protein immunospecifically
binds, and/or reduce overproduction of the polypeptide to which the
Therapeutic antibody used to make the albumin fusion protein
immunospecifically binds. Similarly, administration of an albumin
fusion protein comprising of at least a fragment or variant of a
Therapeutic antibody can activate the polypeptide to which the
Therapeutic antibody used to make the albumin fusion protein
immunospecifically binds, by binding to the polypeptide bound to a
membrane (receptor).
[0225] At the very least, the albumin fusion proteins of the
invention of the present invention can be used as molecular weight
markers on SDS-PAGE gels or on molecular sieve gel filtration
columns using methods well known to those of skill in the art.
Albumin fusion proteins of the invention can also be used to raise
antibodies, which in turn may be used to measure protein expression
of the Therapeutic protein, albumin protein, and/or the albumin
fusion protein of the invention from a recombinant cell, as a way
of assessing transformation of the host cell, or in a biological
sample. Moreover, the albumin fusion proteins of the present
invention can be used to test the biological activities described
herein.
[0226] Diagnostic Assays
[0227] The compounds of the present invention are useful for
diagnosis, treatment, prevention and/or prognosis of various
disorders in mammals, preferably humans. Such disorders include,
but are not limited to, those described for each Therapeutic
protein in the corresponding row of Table 1 and herein under the
section headings "Immune Activity," "Blood Related. Disorders,"
"Hyperproliferative Disorders," "Renal Disorders," "Cardiovascular
Disorders," "Respiratory Disorders," "Anti-Angiogenesis Activity,"
"Diseases at the Cellular Level," "Wound Healing and Epithelial
Cell Proliferation," "Neural Activity and Neurological Diseases,"
"Endocrine Disorders," "Reproductive System Disorders," "Infectious
Disease," "Regeneration," and/or "Gastrointestinal Disorders,"
infra.
[0228] For a number of disorders, substantially altered (increased
or decreased) levels of gene expression can be detected in tissues,
cells or bodily fluids (e.g., sera, plasma, urine, semen, synovial
fluid or spinal fluid) taken from an individual having such a
disorder, relative to a "standard" gene expression level, that is,
the expression level in tissues or bodily fluids from an individual
not having the disorder. Thus, the invention provides a diagnostic
method useful during diagnosis of a disorder, which involves
measuring the expression level of the gene encoding a polypeptide
in tissues, cells or body fluid from an individual and comparing
the measured gene expression level with a standard gene expression
level, whereby an increase or decrease in the gene expression
level(s) compared to the standard is indicative of a disorder.
These diagnostic assays may be performed in vivo or in vitro, such
as, for example, on blood samples, biopsy tissue or autopsy
tissue.
[0229] The present invention is also useful as a prognostic
indicator, whereby patients exhibiting enhanced or depressed gene
expression will experience a worse clinical outcome
[0230] By "assaying the expression level of the gene encoding a
polypeptide" is intended qualitatively or quantitatively measuring
or estimating the level of a particular polypeptide (e.g. a
polypeptide corresponding to a Therapeutic protein disclosed in
Table 1) or the level of the mRNA encoding the polypeptide of the
invention in a first biological sample either directly (e.g., by
determining or estimating absolute protein level or mRNA level) or
relatively (e.g., by comparing to the polypeptide level or mRNA
level in a second biological sample). Preferably, the polypeptide
expression level or mRNA level in the first biological sample is
measured or estimated and compared to a standard polypeptide level
or mRNA level, the standard being taken from a second biological
sample obtained from an individual not having the disorder or being
determined by averaging levels from a population of individuals not
having the disorder. As will be appreciated in the art, once a
standard polypeptide level or mRNA level is known, it can be used
repeatedly as a standard for comparison.
[0231] By "biological sample" is intended any biological sample
obtained from an individual, cell line, tissue culture, or other
source containing polypeptides of the invention (including portions
thereof) or mRNA. As indicated, biological samples include body
fluids (such as sera, plasma, urine, synovial fluid and spinal
fluid) and tissue sources found to express the full length or
fragments thereof of a polypeptide or mRNA. Methods for obtaining
tissue biopsies and body fluids from mammals are well known in the
art. Where the biological sample is to include mRNA, a tissue
biopsy is the preferred source.
[0232] Total cellular RNA can be isolated from a biological sample
using any suitable technique such as the single-step
guanidinium-thiocyanate-phenol-chloroform method described in
Chomczynski and Sacchi, Anal. Biochem. 162:156-159 (1987). Levels
of mRNA encoding the polypeptides of the invention are then assayed
using any appropriate method. These include Northern blot analysis,
S1 nuclease mapping, the polymerase chain reaction (PCR), reverse
transcription in combination with the polymerase chain reaction
(RT-PCR), and reverse transcription in combination with the ligase
chain reaction (RT-LCR).
[0233] The present invention also relates to diagnostic assays such
as quantitative and diagnostic assays for detecting levels of
polypeptides that bind to, are bound by, or associate with albumin
fusion proteins of the invention, in a biological sample (e.g.,
cells and tissues), including determination of normal and abnormal
levels of polypeptides. Thus, for instance, a diagnostic assay in
accordance with the invention for detecting abnormal expression of
polypeptides that bind to, are bound by, or associate with albumin
fusion proteins compared to normal control tissue samples may be
used to detect the presence of tumors. Assay techniques that can be
used to determine levels of a polypeptide that bind to, are bound
by, or associate with albumin fusion proteins of the present
invention in a sample derived from a host are well-known to those
of skill in the art. Such assay methods include radioimmunoassays,
competitive-binding assays, Western Blot analysis and ELISA assays.
Assaying polypeptide levels in a biological sample can occur using
any art-known method.
[0234] Assaying polypeptide levels in a biological sample can occur
using a variety of techniques. For example, polypeptide expression
in tissues can be studied with classical immunohistological methods
(Jalkanen et al., J. Cell. Biol. 101:976-985 (1985); Jalkanen, M.,
et al., J. Cell . Biol. 105:3087-3096 (1987)). Other methods useful
for detecting polypeptide gene expression include immunoassays,
such as the enzyme linked immunosorbent assay (ELISA) and the
radioimmunoassay (RIA). Suitable antibody assay labels are known in
the art and include enzyme labels, such as, glucose oxidase, and
radioisotopes, such as iodine (.sup.125I, .sup.121I), carbon
(.sup.14C), sulfur (.sup.35S), tritium (.sup.3H), indium)
(.sup.112In), and technetium (.sup.99mTc), and fluorescent labels,
such as fluorescein and rhodamine, and biotin.
[0235] The tissue or cell type to be analyzed will generally
include those which are known, or suspected, to express the gene of
interest (such as, for example, cancer). The protein isolation
methods employed herein may, for example, be such as those
described in Harlow and Lane (Harlow, E. and Lane, D., 1988,
"Antibodies: A Laboratory Manual", Cold Spring Harbor Laboratory
Press, Cold Spring Harbor, N.Y.), which is incorporated herein by
reference in its entirety. The isolated cells can be derived from
cell culture or from a patient. The analysis of cells taken from
culture may be a necessary step in the assessment of cells that
could be used as part of a cell-based gene therapy technique or,
alternatively, to test the effect of compounds on the expression of
the gene.
[0236] For example, albumin fusion proteins may be used to
quantitatively or qualitatively detect the presence of polypeptides
that bind to, are bound by, or associate with albumin fusion
proteins of the present invention. This can be accomplished, for
example, by immunofluorescence techniques employing a fluorescently
labeled albumin fusion protein coupled with light microscopic, flow
cytometric, or fluorimetric detection.
[0237] In a preferred embodiment, albumin fusion proteins
comprising at least a fragment or variant of an antibody that
immunospecifically binds at least a Therapeutic protein disclosed
herein (e.g., the Therapeutic proteins disclosed in Table 1) or
otherwise known in the art may be used to quantitatively or
qualitatively detect the presence of gene products or conserved
variants or peptide fragments thereof. This can be accomplished,
for example, by immunofluorescence techniques employing a
fluorescently labeled antibody coupled with light microscopic, flow
cytometric, or fluorimetric detection.
[0238] The albumin fusion proteins of the present invention may,
additionally, be employed histologically, as in immunofluorescence,
immunoelectron microscopy or non-immunological assays, for in situ
detection of polypeptides that bind to, are bound by, or associate
with an albumin fusion protein of the present invention. In situ
detection may be accomplished by removing a histological specimen
from a patient, and applying thereto a labeled antibody or
polypeptide of the present invention. The albumin fusion proteins
are preferably applied by overlaying the labeled albumin fusion
proteins onto a biological sample. Through the use of such a
procedure, it is possible to determine not only the presence of the
polypeptides that bind to, are bound by, or associate with albumin
fusion proteins, but also its distribution in the examined tissue.
Using the present invention, those of ordinary skill will readily
perceive that any of a wide variety of histological methods (such
as staining procedures) can be modified in order to achieve such in
situ detection.
[0239] Immunoassays and non-immunoassays that detect polypeptides
that bind to, are bound by, or associate with albumin fusion
proteins will typically comprise incubating a sample, such as a
biological fluid, a tissue extract, freshly harvested cells, or
lysates of cells which have been incubated in cell culture, in the
presence of a detectably labeled antibody capable of binding gene
products or conserved variants or peptide fragments thereof, and
detecting the bound antibody by any of a number of techniques
well-known in the art.
[0240] The biological sample may be brought in contact with and
immobilized onto a solid phase support or carrier such as
nitrocellulose, or other solid support which is capable of
immobilizing cells, cell particles or soluble proteins. The support
may then be washed with suitable buffers followed by treatment with
the detectably labeled albumin fusion protein of the invention. The
solid phase support may then be washed with the buffer a second
time to remove unbound antibody or polypeptide. Optionally the
antibody is subsequently labeled. The amount of bound label on
solid support may then be detected by conventional means.
[0241] By "solid phase support or carrier" is intended any support
capable of binding a polypeptide (e.g., an albumin fusion protein,
or polypeptide that binds, is bound by, or associates with an
albumin fusion protein of the invention.) Well-known supports or
carriers include glass, polystyrene, polypropylene, polyethylene,
dextran, nylon, amylases, natural and modified celluloses,
polyacrylamides, gabbros, and magnetite. The nature of the carrier
can be either soluble to some extent or insoluble for the purposes
of the present invention. The support material may have virtually
any possible structural configuration so long as the coupled
molecule is capable of binding to a polypeptide. Thus, the support
configuration may be spherical, as in a bead, or cylindrical, as in
the inside surface of a test tube, or the external surface of a
rod. Alternatively, the surface may be flat such as a sheet, test
strip, etc. Preferred supports include polystyrene beads. Those
skilled in the art will know many other suitable carriers for
binding antibody or antigen, or will be able to ascertain the same
by use of routine experimentation.
[0242] The binding activity of a given lot of albumin fusion
protein may be determined according to well known methods. Those
skilled in the art will be able to determine operative and optimal
assay conditions for each determination by employing routine
experimentation.
[0243] In addition to assaying polypeptide levels in a biological
sample obtained from an individual, polypeptide can also be
detected in vivo by imaging. For example, in one embodiment of the
invention, albumin fusion proteins of the invention are used to
image diseased or neoplastic cells.
[0244] Labels or markers for in vivo imaging of albumin fusion
proteins of the invention include those detectable by
X-radiography, NMR, MRI, CAT-scans or ESR. For X-radiography,
suitable labels include radioisotopes such as barium or cesium,
which emit detectable radiation but are not overtly harmful to the
subject. Suitable markers for NMR and ESR include those with a
detectable characteristic spin, such as deuterium, which may be
incorporated into the albumin fusion protein by labeling of
nutrients of a cell line (or bacterial or yeast strain)
engineered.
[0245] Additionally, albumin fusion proteins of the invention whose
presence can be detected, can be administered. For example, albumin
fusion proteins of the invention labeled with a radio-opaque or
other appropriate compound can be administered and visualized in
vivo, as discussed, above for labeled antibodies. Further, such
polypeptides can be utilized for in vitro diagnostic
procedures.
[0246] A polypeptide-specific antibody or antibody fragment which
has been labeled with an appropriate detectable imaging moiety,
such as a radioisotope (for example, .sup.131I, .sup.112In,
.sup.99mTc), a radio-opaque substance, or a material detectable by
nuclear magnetic resonance, is introduced (for example,
parenterally, subcutaneously or intraperitoneally) into the mammal
to be examined for a disorder. It will be understood in the art
that the size of the subject and the imaging system used will
determine the quantity of imaging moiety needed to produce
diagnostic images. In the case of a radioisotope moiety, for a
human subject, the quantity of radioactivity injected will normally
range from about 5 to 20 millicuries of .sup.99mTc. The labeled
albumin fusion protein will then preferentially accumulate at the
locations in the body which contain a polypeptide or other
substance that binds to, is bound by or associates with an albumin
fusion protein of the present invention. In vivo tumor imaging is
described in S. W. Burchiel et al., "Immunopharmacokinetics of
Radiolabeled Antibodies and Their Fragments" (Chapter 13 in Tumor
Imaging: The Radiochemical Detection of Cancer, S. W. Burchiel and
B. A. Rhodes, eds., Masson Publishing Inc. (1982)).
[0247] One of the ways in which an albumin fusion protein of the
present invention can be detectably labeled is by linking the same
to a reporter enzyme and using the linked product in an enzyme
immunoassay (EIA) (Voller, A., "The Enzyme Linked Immunosorbent
Assay (ELISA)", 1978, Diagnostic Horizons 2:1-7, Microbiological
Associates Quarterly Publication, Walkersville, Md.); Voller et
al., J. Clin. Pathol. 31:507-520 (1978); Butler, J. E., Meth.
Enzymol. 73:482-523 (1981); Maggio, E. (ed.), 1980, Enzyme
Immunoassay, CRC Press, Boca Raton, Fla.,; Ishikawa, E. et al.,
(eds.), 1981, Enzyme Immunoassay, Kgaku Shoin, Tokyo). The reporter
enzyme which is bound to the antibody will react with an
appropriate substrate, preferably a chromogenic substrate, in such
a manner as to produce a chemical moiety which can be detected, for
example, by spectrophotometric, fluorimetric or by visual means.
Reporter enzymes which can be used to detectably label the antibody
include, but are not limited to, malate dehydrogenase,
staphylococcal nuclease, delta-5-steroid isomerase, yeast alcohol
dehydrogenase, alpha-glycerophosphate, dehydrogenase, triose
phosphate isomerase, horseradish peroxidase, alkaline phosphatase,
asparaginase, glucose oxidase, beta-galactosidase, ribonuclease,
urease, catalase, glucose-6-phosphate dehydrogenase, glucoamylase
and acetylcholinesterase. Additionally, the detection can be
accomplished by colorimetric methods which employ a chromogenic
substrate for the reporter enzyme. Detection may also be
accomplished by visual comparison of the extent of enzymatic
reaction of a substrate in comparison with similarly prepared
standards.
[0248] Albumin fusion proteins may also be radiolabelled and used
in any of a variety of other immunoassays. For example, by
radioactively labeling the albumin fusion proteins, it is possible
to the use the albumin fusion proteins in a radioimmunoassay (RIA)
(see, for example, Weintraub, B., Principles of Radioimmunoassays,
Seventh Training Course on Radioligand Assay Techniques, The
Endocrine Society, March, 1986, which is incorporated by reference
herein). The radioactive isotope can be detected by means
including, but not limited to, a gamma counter, a scintillation
counter, or autoradiography.
[0249] It is also possible to label the albumin fusion proteins
with a fluorescent compound. When the fluorescently labeled
antibody is exposed to light of the proper wave length, its
presence can then be detected due to fluorescence. Among the most
commonly used fluorescent labeling compounds are fluorescein
isothiocyanate, rhodamine, phycoerythrin, phycocyanin,
allophycocyanin, ophthaldehyde and fluorescamine.
[0250] The albumin fusion protein can also be detectably labeled
using fluorescence emitting metals such as .sup.152Eu, or others of
the lanthanide series. These metals can be attached to the antibody
using such metal chelating groups as diethylenetriaminepentacetic
acid (DTPA) or ethylenediaminetetraacetic acid (EDTA).
[0251] The albumin fusion proteins can also can be detectably
labeled by coupling it to a chemiluminescent compound. The presence
of the chemiluminescent-tagged albumin fusion protein is then
determined by detecting the presence of luminescence that arises
during the course of a chemical reaction. Examples of particularly
useful chemiluminescent labeling compounds are luminol, isoluminol,
theromatic acridinium ester, imidazole, acridinium salt and oxalate
ester.
[0252] Likewise, a bioluminescent compound may be used to label
albumin fusion proteins of the present invention. Bioluminescence
is a type of chemiluminescence found in biological systems in,
which a catalytic protein increases the efficiency of the
chemiluminescent reaction. The presence of a bioluminescent protein
is determined by detecting the presence of luminescence. Important
bioluminescent compounds for purposes of labeling are luciferin,
luciferase and aequorin.
Transgenic Organisms
[0253] Transgenic organisms that express the albumin fusion
proteins of the invention are also included in the invention.
Transgenic organisms are genetically modified organisms into which
recombinant, exogenous or cloned genetic material has been
transferred. Such genetic material is often referred to as a
transgene. The nucleic acid sequence of the transgene may include
one or more transcriptional regulatory sequences and other nucleic
acid sequences such as introns, that may be necessary for optimal
expression and secretion of the encoded protein. The transgene may
be designed to direct the expression of the encoded protein in a
manner that facilitates its recovery from the organism or from a
product produced by the organism, e.g. from the milk, blood, urine,
eggs, hair or seeds of the organism. The transgene may consist of
nucleic acid sequences derived from the genome of the same species
or of a different species than the species of the target animal.
The transgene may be integrated either at a locus of a genome where
that particular nucleic acid sequence is not otherwise normally
found or at the normal locus for the transgene.
[0254] The term "germ cell line transgenic organism" refers to a
transgenic organism in which the genetic alteration or genetic
information was introduced into a germ line cell, thereby
conferring the ability of the transgenic organism to transfer the
genetic information to offspring. If such offspring in fact possess
some or all of that alteration or genetic information, then they
too are transgenic organisms. The alteration or genetic information
may be foreign to the species of organism to which the recipient
belongs, foreign only to the particular individual recipient, or
may be genetic information already possessed by the recipient. In
the last case, the altered or introduced gene may be expressed
differently than the native gene.
[0255] A transgenic organism may be a transgenic animal or a
transgenic plant. Transgenic animals can be produced by a variety
of different methods including transfection, electroporation,
microinjection, gene targeting in embryonic stem cells and
recombinant viral and retroviral infection (see, e.g., U.S. Pat.
No. 4,736,866; U.S. Pat. No. 5,602,307; Mullins et al. (1993)
Hypertension 22(4):630-633; Brenin et al. (1997) Surg. Oncol.
6(2)99-110; Tuan (ed.), Recombinant Gene Expression Protocols,
Methods in Molecular Biology No. 62, Humana Press (1997)). The
method of introduction of nucleic acid fragments into recombination
competent mammalian cells can be by any method which favors
co-transformation of multiple nucleic acid molecules. Detailed
procedures for producing transgenic animals are readily available
to one skilled in the art, including the disclosures in U.S. Pat.
No. 5,489,743 and U.S. Pat. No. 5,602,307.
[0256] A number of recombinant or transgenic mice have been
produced, including those which express an activated oncogene
sequence (U.S. Pat. No. 4,736,866); express simian SV40 T-antigen
(U.S. Pat. No. 5,728,915); lack the expression of interferon
regulatory factor 1 (IRF-1) (U.S. Pat. No. 5,731,490); exhibit
dopaminergic dysfunction (U.S. Pat. No. 5,723,719); express at
least one human gene which participates in blood pressure control
(U.S. Pat. No. 5,731,489); display greater similarity to the
conditions existing in naturally occurring Alzheimer's disease
(U.S. Pat. No. 5,720,936); have a reduced capacity to mediate
cellular adhesion (U.S. Pat. No. 5,602,307); possess a bovine
growth hormone gene (Clutter et al. (1996) Genetics
143(4):1753-1760); or, are capable of generating a fully human
antibody response (McCarthy (1997) The Lancet 349(9049):405).
[0257] While mice and rats remain the animals of choice for most
transgenic experimentation, in some instances it is preferable or
even necessary to use alternative animal species. Transgenic
procedures have been successfully utilized in a variety of
non-murine animals, including sheep, goats, pigs, dogs, cats,
monkeys, chimpanzees, hamsters, rabbits, cows and guinea pigs (see,
e.g., Kim et al. (1997) Mol. Reprod. Dev. 46(4):515-526; Houdebine
(1995) Reprod. Nutr. Dev. 35(6):609-617; Petters (1994) Reprod.
Fertil. Dev. 6(5):643-645; Schnieke et al. (1997) Science
278(5346):2130-2133; and Amoah (1997) J. Animal Science
75(2):578-585).
[0258] To direct the secretion of the transgene-encoded protein of
the invention into the milk of transgenic mammals, it may be put
under the control of a promoter that is preferentially activated in
mammary epithelial cells. Promoters that control the genes encoding
milk proteins are preferred, for example the promoter for casein,
beta lactoglobulin, whey acid protein, or lactalbumin (see, e.g.,
DiTullio (1992) BioTechnology 10:74-77; Clark et al.
[0259] (1989) BioTechnology 7:487-492; Gorton et al. (1987)
BioTechnology 5:1183-1187; and Soulier et al. (1992) FEBS Letts.
297:13). The transgenic mammals of choice would produce large
volumes of milk and have long lactating periods, for example goats,
cows, camels or sheep.
[0260] An albumin fusion protein of the invention can also be
expressed in a transgenic plant, e.g. a plant in which the DNA
transgene is inserted into the nuclear or plastidic genome. Plant
transformation procedures used to introduce foreign nucleic acids
into plant cells or protoplasts are known in the art (e.g., see
Example 19). See, in general, Methods in Enzymology Vol. 153
("Recombinant DNA Part D") 1987, Wu and Grossman Eds., Academic
Press and European Patent Application EP 693554. Methods for
generation of genetically engineered plants are further described
in U.S. Pat. No. 5,283,184, U.S. Pat. No. 5, 482,852, and European
Patent Application EP 693 554, all of which are hereby incorporated
by reference.
Pharmaceutical or Therapeutic Compositions
[0261] The albumin fusion proteins of the invention or formulations
thereof may be administered by any conventional method including
parenteral (e.g. subcutaneous or intramuscular) injection or
intravenous infusion. The treatment may consist of a single dose or
a plurality of doses over a period of time.
[0262] While it is possible for an albumin fusion protein of the
invention to be administered alone, it is preferable to present it
as a pharmaceutical formulation, together with one or more
acceptable carriers. The carrier(s) must be "acceptable" in the
sense of being compatible with the albumin fusion protein and not
deleterious to the recipients thereof. Typically, the carriers will
be water or saline which will be sterile and pyrogen free. Albumin
fusion proteins of the invention are particularly well suited to
formulation in aqueous carriers such as sterile pyrogen free water,
saline or other isotonic solutions because of their extended
shelf-life in solution. For instance, pharmaceutical compositions
of the invention may be formulated well in advance in aqueous form,
for instance, weeks or months or longer time periods before being
dispensed.
[0263] For example, wherein the Therapeutic protein is hGH, EPO,
alpha-IFN or beta-IFN, formulations containing the albumin fusion
protein may be prepared taking into account the extended shelf-life
of the albumin fusion protein in aqueous formulations. As exhibited
in Table 2, most Therapeutic proteins are unstable with short
shelf-lives after formulation with an aqueous carrier. As discussed
above, the shelf-life of many of these Therapeutic proteins are
markedly increased or prolonged after fusion to HA.
TABLE-US-00002 TABLE 2 Trade name, Storage Conditions Protein
Manufacturer Route Formulation of Non-Fusion Protein Interferon,
alpha-2a Roferon-A, sc im sol_n (vial or pre-filled syringe)
4-8.degree. C. Hoffmann-LaRoche Interferon, alpha-2b Intron-A, iv
sc im sol_n; powder + dil. 4-8.degree. C. Schering Plough (all
preps, before and after dilution) COMBO Interferon Rebetron
(Intron-A + po + sc Rebetol capsule + Intron-A injection alpha-2b +
Ribavirin Rebetol) Schering Plough Interferon, Alphacon-1 Infergen
Amgen sc sol_n 4-8.degree. C. Interferon, alpha-nl, Wellferon,
Wellcome sc im sol_n (with albumin _as stablizer_) 4-8.degree. C.
Lympho-blastoid Interferon, beta-1a Avonex, Biogen im powder + dil.
(with albumin) 4-8.degree. C. (before and after dilution) (Use
within 3-6 h of reconstitution) Rebif, Ares-Serono sc sol_n, in
pre-filled syringe (Europe only) Interferon, beta-1b Betaseron,
Chiron sc powder + dil. (with albumin) 4-8.degree. C. (before and
after dilution) (Europe: Betaferon) (Use within 3 h of
reconstitution) Single use vials. Interferon, Gamma-1b Actimmune,
InterMune sc 4-8.degree. C. (before and after dilution)
Pharmaceuticals (Use within 3 h of reconstitution). Growth Hormone
Genotropin, powder/dil cartridges 4-8.degree. C. (before and after
dilution); (somatropin) Pharmacia Upjohn (single or multi-use);
single use MiniQuick Delivery Device single use MiniQuick injector
should be refrigerated until use. Humatrope, sc im powder + dil.
4-8.degree. C. (before and after dilution) Eli Lilly (Vial or pen
cartridge) (Use vials within 25 h, cartridges within 28 d, of
reconstitution). Norditropin, Novo Nordisk Pharmaceuticals
Nutropin, Genentech sc powder + dil. 4-8.degree. C. (stable for 14
d after dil_n) (all preps, before and after dilution) Nutropin AQ,
sc sol_n 4-8.degree. C. (Stable for 28 d after 1st use) Genentech
Nutropin Depot, sc microsphere suspension as 4-8.degree. C. Single
use pkges. Dose Genentech powder + dil. 1-2.times./month (ProLease
micro- encapsulation technol.) Saizen, (Serono) sc im powder + dil.
Powder _should be stored at Rm Temp_. After reconstitution store
4-8.degree. C. for up to 14 d. Serostim, Serono Powder _should be
stored at Rm Temp_. After reconstitution store in 4-8.degree. C.
for up to 14 d. hGH, with N-term. Met Protropin, sc im powder +
dil. 4-8.degree. C. (all preps, before and after (somatrem)
Genentech dilution) Erythropoietin Epogen, Amgen iv sc sol_n
4-8.degree. C. (use within 21 d of first use) (Epoetin alfa)
(Single & multi-dose vials) Procrit, Amgen iv sc sol_n
4-8.degree. C. (use within 21 d of first use) (Single &
multi-dose vials)
[0264] In instances where aerosol administration is appropriate,
the albumin fusion proteins of the invention can be formulated as
aerosols using standard procedures. The term "aerosol" includes any
gas-borne suspended phase of an albumin fusion protein of the
instant invention which is capable of being inhaled into the
bronchioles or nasal passages. Specifically, aerosol includes a
gas-borne suspension of droplets of an albumin fusion protein of
the instant invention, as may be produced in a metered dose inhaler
or nebulizer, or in a mist sprayer. Aerosol also includes a dry
powder composition of a compound of the instant invention suspended
in air or other carrier gas, which may be delivered by insufflation
from an inhaler device, for example. See Ganderton & Jones,
Drug Delivery to the Respiratory Tract, Ellis Horwood (1987); Gonda
(1990) Critical Reviews in Therapeutic Drug Carrier Systems
6:273-313; and Raeburn et al,. (1992) Pharmacol. Toxicol. Methods
27:143-159.
[0265] The formulations of the invention are also typically
non-immunogenic, in part, because of the use of the components of
the albumin fusion protein being derived from the proper species.
For instance, for human use, both the Therapeutic protein and
albumin portions of the albumin fusion protein will typically be
human. In some cases, wherein either component is non
human-derived, that component may be humanized by substitution of
key amino acids so that specific epitopes appear to the human
immune system to be human in nature rather than foreign.
[0266] The formulations may conveniently be presented in unit
dosage form and may be prepared by any of the methods well known in
the art of pharmacy. Such methods include the step of bringing into
association the albumin fusion protein with the carrier that
constitutes one or more accessory ingredients. In general the
formulations are prepared by uniformly and intimately bringing into
association the active ingredient with liquid carriers or finely
divided solid carriers or both, and then, if necessary, shaping the
product.
[0267] Formulations suitable for parenteral administration include
aqueous and non-aqueous sterile injection solutions which may
contain anti-oxidants, buffers, bacteriostats and solutes which
render the formulation appropriate for the intended recipient; and
aqueous and non-aqueous sterile suspensions which may include
suspending agents and thickening agents. The formulations may be
presented in unit-dose or multi-dose containers, for example sealed
ampules, vials or syringes, and may be stored in a freeze-dried
(lyophilised) condition requiring only the addition of the sterile
liquid carrier, for example water for injections, immediately prior
to use. Extemporaneous injection solutions and suspensions may be
prepared from sterile powders. Dosage formulations may contain the
Therapeutic protein portion at a lower molar concentration or lower
dosage compared to the non-fused standard formulation for the
Therapeutic protein given the extended serum half-life exhibited by
many of the albumin fusion proteins of the invention.
[0268] As an example, when an albumin fusion protein of the
invention comprises growth hormone as one or more of the
Therapeutic protein regions, the dosage form can be calculated on
the basis of the potency of the albumin fusion protein relative to
the potency of hGH, while taking into account the prolonged serum
half-life and shelf-life of the albumin fusion proteins compared to
that of native hGH. Growth hormone is typically administered at 0.3
to 30.0 IU/kg/week, for example 0.9 to 12.0 IU/kg/week, given in
three or seven divided doses for a year or more. In an albumin
fusion protein consisting of full length HA fused to full length
GH, an equivalent dose in terms of units would represent a greater
weight of agent but the dosage frequency can be reduced, for
example to twice a week, once a week or less.
[0269] Formulations or compositions of the invention may be
packaged together with, or included in a kit with, instructions or
a package insert referring to the extended shelf-life of the
albumin fusion protein component. For instance, such instructions
or package inserts may address recommended storage conditions, such
as time, temperature and light, taking into account the extended or
prolonged shelf-life of the albumin fusion proteins of the
invention. Such instructions or package inserts may also address
the particular advantages of the albumin fusion proteins of the
inventions, such as the ease of storage for formulations that may
require use in the field, outside of controlled hospital, clinic or
office conditions. As described above, formulations of the
invention may be in aqueous form and may be stored under less than
ideal circumstances without significant loss of therapeutic
activity.
[0270] Albumin fusion proteins of the invention can also be
included in nutraceuticals. For instance, certain albumin fusion
proteins of the invention may be administered in natural products,
including milk or milk product obtained from a transgenic mammal
which expresses albumin fusion protein. Such compositions can also
include plant or plant products obtained from a transgenic plant
which expresses the albumin fusion protein. The albumin fusion
protein can also be provided in powder or tablet form, with or
without other known additives, carriers, fillers and diluents.
Nutraceuticals are described in Scott Hegenhart, Food Product
Design, December 1993.
[0271] The invention also provides methods of treatment and/or
prevention of diseases or disorders (such as, for example, any one
or more of the diseases or disorders disclosed herein) by
administration to a subject of an effective amount of an albumin
fusion protein of the invention or a polynucleotide encoding an
albumin fusion protein of the invention ("albumin fusion
polynucleotide") in a pharmaceutically acceptable carrier.
[0272] The albumin fusion protein and/or polynucleotide will be
formulated and dosed in a fashion consistent with good medical
practice, taking into account the clinical condition of the
individual patient (especially the side effects of treatment with
the albumin fusion protein and/or polynucleotide alone), the site
of delivery, the method of administration, the scheduling of
administration, and other factors known to practitioners. The
"effective amount" for purposes herein is thus determined by such
considerations.
[0273] As a general proposition, the total pharmaceutically
effective amount of the albumin fusion protein administered
parenterally per dose will be in the range of about lug/kg/day to
10 mg/kg/day of patient body weight, although, as noted above, this
will be subject to therapeutic discretion. More preferably, this
dose is at least 0.01 mg/kg/day, and most preferably for humans
between about 0.01 and 1 mg/kg/day for the hormone. If given
continuously, the albumin fusion protein is typically administered
at a dose rate of about 1 ug/kg/hour to about 50 ug/kg/hour, either
by 1-4 injections per day or by continuous subcutaneous infusions,
for example, using a mini-pump. An intravenous bag solution may
also be employed. The length of treatment needed to observe changes
and the interval following treatment for responses to occur appears
to vary depending on the desired effect.
[0274] Albumin fusion proteins and/or polynucleotides can be are
administered orally, rectally, parenterally, intracisternally,
intravaginally, intraperitoneally, topically (as by powders,
ointments, gels, drops or transdermal patch), bucally, or as an
oral or nasal spray. "Pharmaceutically acceptable carrier" refers
to a non-toxic solid, semisolid or liquid filler, diluent,
encapsulating material or formulation auxiliary of any. The term
"parenteral" as used herein refers to modes of administration which
include intravenous, intramuscular, intraperitoneal, intrasternal,
subcutaneous and intraarticular injection and infusion.
[0275] Albumin fusion proteins and/or polynucleotides of the
invention are also suitably administered by sustained-release
systems. Examples of sustained-release albumin fusion proteins
and/or polynucleotides are administered orally, rectally,
parenterally, intracisternally, intravaginally, intraperitoneally,
topically (as by powders, ointments, gels, drops or transdermal
patch), bucally, or as an oral or nasal spray. "Pharmaceutically
acceptable carrier" refers to a non-toxic solid, semisolid or
liquid filler, diluent, encapsulating material or formulation
auxiliary of any type. The term "parenteral" as used herein refers
to modes of administration which include intravenous,
intramuscular, intraperitoneal, intrasternal, subcutaneous and
intraarticular injection and infusion. Additional examples of
sustained-release albumin fusion proteins and/or polynucleotides
include suitable polymeric materials (such as, for example,
semi-permeable polymer matrices in the form of shaped articles,
e.g., films, or mirocapsules), suitable hydrophobic materials (for
example as an emulsion in an acceptable oil) or ion exchange
resins, and sparingly soluble derivatives (such as, for example, a
sparingly soluble salt).
[0276] Sustained-release matrices include polylactides (U.S. Pat.
No. 3,773,919, EP 58,481), copolymers of L-glutamic acid and
gamma-ethyl-L-glutamate (Sidman et al., Biopolymers 22:547-556
(1983)), poly (2-hydroxyethyl methacrylate) (Langer et al., J.
Biomed. Mater. Res. 15:167-277 (1981), and Langer, Chem. Tech.
12:98-105 (1982)), ethylene vinyl acetate (Langer et al., Id.) or
poly-D-(-)-3-hydroxybutyric acid (EP 133,988).
[0277] Sustained-release albumin fusion proteins and/or
polynucleotides also include liposomally entrapped albumin fusion
proteins and/or polynucleotides of the invention (see generally,
Langer, Science 249:1527-1533 (1990); Treat et al., in Liposomes in
the Therapy of Infectious Disease and Cancer, Lopez-Berestein and
Fidler (eds.), Liss, New York, pp. 317-327 and 353-365 (1989)).
Liposomes containing the albumin fusion protein and/or
polynucleotide are prepared by methods known per se: DE 3,218,121;
Epstein et al., Proc. Natl. Acad. Sci. (USA) 82:3688-3692 (1985);
Hwang et al., Proc. Natl. Acad. Sci.(USA) 77:4030-4034 (1980); EP
52,322; EP 36,676; EP 88,046; EP 143,949; EP 142,641; Japanese Pat.
Appl. 83-118008; U.S. Pat. Nos. 4,485,045 and 4,544,545; and EP
102,324. Ordinarily, the liposomes are of the small (about 200-800
Angstroms) unilamellar type in which the lipid content is greater
than about 30 mol. percent cholesterol, the selected proportion
being adjusted for the optimal Therapeutic.
[0278] In yet an additional embodiment, the albumin fusion proteins
and/or polynucleotides of the invention are delivered by way of a
pump (see Langer, supra; Sefton, CRC Crit. Ref. Biomed. Eng. 14:201
(1987); Buchwald et al., Surgery 88:507 (1980); Saudek et al., N.
Engl. J. Med. 321:574 (1989)).
[0279] Other controlled release systems are discussed in the review
by Langer (Science 249:1527-1533 (1990)).
[0280] For parenteral administration, in one embodiment, the
albumin fusion protein and/or polynucleotide is formulated
generally by mixing it at the desired degree of purity, in a unit
dosage injectable form (solution, suspension, or emulsion), with a
pharmaceutically acceptable carrier, i.e., one that is non-toxic to
recipients at the dosages and concentrations employed and is
compatible with other ingredients of the formulation. For example,
the formulation preferably does not include oxidizing agents and
other compounds that are known to be deleterious to the
Therapeutic.
[0281] Generally, the formulations are prepared by contacting the
albumin fusion protein and/or polynucleotide uniformly and
intimately with liquid carriers or finely divided solid carriers or
both. Then, if necessary, the product is shaped into the desired
formulation. Preferably the carrier is a parenteral carrier, more
preferably a solution that is isotonic with the blood of the
recipient. Examples of such carrier vehicles include water, saline,
Ringer's solution, and dextrose solution. Non-aqueous vehicles such
as fixed oils and ethyl oleate are also useful herein, as well as
liposomes.
[0282] The carrier suitably contains minor amounts of additives
such as substances that enhance isotonicity and chemical stability.
Such materials are non-toxic to recipients at the dosages and
concentrations employed, and include buffers such as phosphate,
citrate, succinate, acetic acid, and other organic acids or their
salts; antioxidants such as ascorbic acid; low molecular weight
(less than about ten residues) polypeptides, e.g., polyarginine or
tripeptides; proteins, such as serum albumin, gelatin, or
immunoglobulins; hydrophilic polymers such as polyvinylpyrrolidone;
amino acids, such as glycine, glutamic acid, aspartic acid, or
arginine; monosaccharides, disaccharides, and other carbohydrates
including cellulose or its derivatives, glucose, manose, or
dextrins; chelating agents such as EDTA; sugar alcohols such as
mannitol or sorbitol; counterions such as sodium; and/or nonionic
surfactants such as polysorbates, poloxamers, or PEG.
[0283] The albumin fusion protein is typically formulated in such
vehicles at a concentration of about 0.1 mg/ml to 100 mg/ml,
preferably 1-10 mg/ml, at a pH of about 3 to 8. It will be
understood that the use of certain of the foregoing excipients,
carriers, or stabilizers will result in the formation of
polypeptide salts.
[0284] Any pharmaceutical used for therapeutic administration can
be sterile. Sterility is readily accomplished by filtration through
sterile filtration membranes (e.g., 0.2 micron membranes). Albumin
fusion proteins and/or polynucleotides generally are placed into a
container having a sterile access port, for example, an intravenous
solution bag or vial having a stopper pierceable by a hypodermic
injection needle.
[0285] Albumin fusion proteins and/or polynucleotides ordinarily
will be stored in unit or multi-dose containers, for example,
sealed ampoules or vials, as an aqueous solution or as a
lyophilized formulation for reconstitution. As an example of a
lyophilized formulation, 10-ml vials are filled with 5 ml of
sterile-filtered 1% (w/v) aqueous albumin fusion protein and/or
polynucleotide solution, and the resulting mixture is lyophilized.
The infusion solution is prepared by reconstituting the lyophilized
albumin fusion protein and/or polynucleotide using bacteriostatic
Water-for-Injection.
[0286] In a specific and preferred embodiment, the Albumin fusion
protein formulations comprises 0.01 M sodium phosphate, 0.15 mM
sodium chloride, 0.16 micromole sodium octanoate/milligram of
fusion protein, 15 micrograms/milliliter polysorbate 80, pH 7.2. In
another specific and preferred embodiment, the Albumin fusion
protein formulations consists 0.01 M sodium phosphate, 0.15 mM
sodium chloride, 0.16 micromole sodium octanoate/milligram of
fusion protein, 15 micrograms/milliliter polysorbate 80, pH 7.2.
The pH and buffer are chosen to match physiological conditions and
the salt is added as a tonicifier. Sodium octanoate has been chosen
due to its reported ability to increase the thermal stability of
the protein in solution. Finally, polysorbate has been added as a
generic surfactant, which lowers the surface tension of the
solution and lowers non-specific adsorption of the albumin fusion
protein to the container closure system.
[0287] The invention also provides a pharmaceutical pack or kit
comprising one or more containers filled with one or more of the
ingredients of the albumin fusion proteins and/or polynucleotides
of the invention. Associated with such container(s) can be a notice
in the form prescribed by a governmental agency regulating the
manufacture, use or sale of pharmaceuticals or biological products,
which notice reflects approval by the agency of manufacture, use or
sale for human administration. In addition, the albumin fusion
proteins and/or polynucleotides may be employed in conjunction with
other therapeutic compounds.
[0288] The albumin fusion proteins and/or polynucleotides of the
invention may be administered alone or in combination with
adjuvants. Adjuvants that may be administered with the albumin
fusion proteins and/or polynucleotides of the invention include,
but are not limited to, alum, alum plus deoxycholate (ImmunoAg),
MTP-PE (Biocine Corp.), QS21 (Genentech, Inc.), BCG (e.g.,
THERACYS.RTM.), MPL and nonviable preparations of Corynebacterium
parvum. In a specific embodiment, albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with alum. In another specific embodiment, albumin fusion proteins
and/or polynucleotides of the invention are administered in
combination with QS-21. Further adjuvants that may be administered
with the albumin fusion proteins and/or polynucleotides of the
invention include, but are not limited to, Monophosphoryl lipid
immunomodulator, AdjuVax 100a, QS-21, QS-18, CRL1005, Aluminum
salts, MF-59, and Virosomal adjuvant technology. Vaccines that may
be administered with the albumin fusion proteins and/or
polynucleotides of the invention include, but are not limited to,
vaccines directed toward protection against MMR (measles. mumps,
rubella), polio, varicella, tetanus/diptheria, hepatitis A,
hepatitis B, Haemophilus influenzae B, whooping cough, pneumonia,
influenza, Lyme's Disease, rotavirus, cholera, yellow fever,
Japanese encephalitis, poliomyelitis, rabies, typhoid fever, and
pertussis. Combinations may be administered either concomitantly,
e.g., as an admixture, separately but simultaneously or
concurrently; or sequentially. This includes presentations in which
the combined agents are administered together as a therapeutic
mixture, and also procedures in which the combined agents are
administered separately but simultaneously, e.g., as through
separate intravenous lines into the same individual. Administration
"in combination" further includes the separate administration of
one of the compounds or agents given first, followed by the
second.
[0289] The albumin fusion proteins and/or polynucleotides of the
invention may be administered alone or in combination with other
therapeutic agents. Albumin fusion protein and/or polynucleotide
agents that may be administered in combination with the albumin
fusion proteins and/or polynucleotides of the invention, include
but not limited to, chemotherapeutic agents, antibiotics, steroidal
and non-steroidal anti-inflammatories, conventional
immunotherapeutic agents, and/or therapeutic treatments described
below. Combinations may be administered either concomitantly, e.g.,
as an admixture, separately but simultaneously or concurrently; or
sequentially. This includes presentations in which the combined
agents are administered together as a therapeutic mixture, and also
procedures in which the combined agents are administered separately
but simultaneously, e.g., as through separate intravenous lines
into the same individual. Administration "in combination" further
includes the separate administration of one of the compounds or
agents given first, followed by the second.
[0290] In one embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with an anticoagulant. Anticoagulants that may be administered with
the compositions of the invention include, but are not limited to,
heparin, low molecular weight heparin, warfarin sodium (e.g.,
COUMADIN.RTM.), dicumarol, 4-hydroxycoumarin, anisindione (e.g.,
MIRADON.TM.), acenocoumarol (e.g., nicoumalone, SINTHROME.TM.),
indan-1,3-dione, phenprocoumon (e.g., MARCUMAR.TM.), ethyl
biscoumacetate (e.g., TROMEXAN.TM.), and aspirin. In a specific
embodiment, compositions of the invention are administered in
combination with heparin and/or warfarin. In another specific
embodiment, compositions of the invention are administered in
combination with warfarin. In another specific embodiment,
compositions of the invention are administered in combination with
warfarin and aspirin. In another specific embodiment, compositions
of the invention are administered in combination with heparin. In
another specific embodiment, compositions of the invention are
administered in combination with heparin and aspirin.
[0291] In another embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with thrombolytic drugs. Thrombolytic drugs that may be
administered with the compositions of the invention include, but
are not limited to, plasminogen, lys-plasminogen,
alpha2-antiplasmin, streptokinae (e.g., KABIKINASE.TM.),
antiresplace (e.g., EMINASE.TM.), tissue plasminogen activator
(t-PA, altevase, ACTIVASE.TM.), urokinase (e.g., ABBOKINASE.TM.),
sauruplase, (Prourokinase, single chain urokinase), and
aminocaproic acid (e.g., AMICAR.TM.). In a specific embodiment,
compositions of the invention are administered in combination with
tissue plasminogen activator and aspirin.
[0292] In another embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with antiplatelet drugs. Antiplatelet drugs that may be
administered with the compositions of the invention include, but
are not limited to, aspirin, dipyridamole (e.g., PERSANTINE.TM.),
and ticlopidine (e.g., TICLID.TM.).
[0293] In specific embodiments, the use of anti-coagulants,
thrombolytic and/or antiplatelet drugs in combination with albumin
fusion proteins and/or polynucleotides of the invention is
contemplated for the prevention, diagnosis, and/or treatment of
thrombosis, arterial thrombosis, venous thrombosis,
thromboembolism, pulmonary embolism, atherosclerosis, myocardial
infarction, transient ischemic attack, unstable angina. In specific
embodiments, the use of anticoagulants, thrombolytic drugs and/or
antiplatelet drugs in combination with albumin fusion proteins
and/or polynucleotides of the invention is contemplated for the
prevention of occulsion of saphenous grafts, for reducing the risk
of periprocedural thrombosis as might accompany angioplasty
procedures, for reducing the risk of stroke in patients with atrial
fibrillation including nonrheumatic atrial fibrillation, for
reducing the risk of embolism associated with mechanical heart
valves and or mitral valves disease. Other uses for the
therapeutics of the invention, alone or in combination with
antiplatelet, anticoagulant, and/or thrombolytic drugs, include,
but are not limited to, the prevention of occlusions in
extracorporeal devices. (e.g., intravascular canulas, vascular
access shunts in hemodialysis patients, hemodialysis machines, and
cardiopulmonary bypass machines).
[0294] In certain embodiments, albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with antiretroviral agents, nucleoside/nucleotide reverse
transcriptase inhibitors (NRTIs), non-nucleoside reverse
transcriptase inhibitors (NNRTIs), and/or protease inhibitors
(PIs). NRTIs that may be administered in combination with the
albumin fusion proteins and/or polynucleotides of the invention,
include, but are not limited to, RETROVIR.TM. (zidovudine/AZT),
VIDEX.TM. (didanosine/ddI), HIVID.TM. (zalcitabine/ddC), ZERIT.TM.
(stavudine/d4T), EPIVIR.TM. (lamivudine/3TC), and COMBIVIR.TM.
(zidovudine/lamivudine). NNRTIs that may be administered in
combination with the albumin fusion proteins and/or polynucleotides
of the invention, include, but are not limited to, VIRAMUNE.TM.
(nevirapine), RESCRIPTOR.TM. (delavirdine), and SUSTIVA.TM.
(efavirenz). Protease inhibitors that may be administered in
combination with the albumin fusion proteins and/or polynucleotides
of the invention, include, but are not limited to, CRIXIVAN.TM.
(indinavir), NORVIR.TM. (ritonavir), INVIRASE.TM. (saquinavir), and
VIRACEPT.TM. (nelfinavir). In a specific embodiment, antiretroviral
agents, nucleoside reverse transcriptase inhibitors, non-nucleoside
reverse transcriptase inhibitors, and/or protease inhibitors may be
used in any combination with albumin fusion proteins and/or
polynucleotides of the invention to treat AIDS and/or to prevent or
treat HIV infection.
[0295] Additional NRTIs include LODENOSINE.TM. (F-ddA; an
acid-stable adenosine NRTI; Triangle/Abbott; COVIRACIL.TM.
(emtricitabine/FTC; structurally related to lamivudine (3TC) but
with 3- to 10-fold greater activity in vitro; Triangle/Abbott);
dOTC (BCH-10652, also structurally related to lamivudine but
retains activity against a substantial proportion of
lamivudine-resistant isolates; Biochem Pharma); Adefovir (refused
approval for anti-HIV therapy by FDA; Gilead Sciences);
PREVEON.RTM. (Adefovir Dipivoxil, the active prodrug of adefovir;
its active form is PMEA-pp); TENOFOVIR.TM. (bis-POC PMPA, a PMPA
prodrug; Gilead); DAPD/DXG (active metabolite of DAPD;
Triangle/Abbott); D-D4FC (related to 3TC, with activity against
AZT/3TC-resistant virus); GW420867X (Glaxo Wellcome); ZIAGEN.TM.
(abacavir/159U89; Glaxo Wellcome Inc.); CS-87
(3'azido-2',3'-dideoxyuridine; WO 99/66936); and S-acyl-2-thioethyl
(SATE)-bearing prodrug forms of .beta.-L-FD4C and .beta.-L-FddC
(see, International Publication No. WO 98/17281).
[0296] Additional NNRTIs include COACTINON.TM. (Emivirine/MKC-442,
potent NNRTI of the HEPT class; Triangle/Abbott); CAPRAVIRINE.TM.
(AG-1549/S-1153, a next generation NNRTI with activity against
viruses containing the K103N mutation; Agouron); PNU-142721 (has
20- to 50-fold greater activity than its predecessor delavirdine
and is active against K103N mutants; Pharmacia & Upjohn);
DPC-961 and DPC-963 (second-generation derivatives of efavirenz,
designed to be active against viruses with the K103N mutation;
DuPont); GW-420867X (has 25-fold greater activity than HBY097 and
is active against K103N mutants; Glaxo Wellcome); CALANOLIDE A
(naturally occurring agent from the latex tree; active against
viruses containing either or both the Y181C and K103N mutations);
and Propolis (see, International Publication No. WO 99/49830).
[0297] Additional protease inhibitors include LOPINAVIR.TM.
(ABT378/r; Abbott Laboratories); BMS-232632 (an azapeptide;
Bristol-Myres Squibb); TIPRANAVIR.TM. (PNU-140690, a non-peptic
dihydropyrone; Pharmacia & Upjohn); PD-178390 (a nonpeptidic
dihydropyrone; Parke-Davis); BMS 232632 (an azapeptide;
Bristol-Myers Squibb); L-756,423 (an indinavir analog; Merck);
DMP-450 (a cyclic urea compound; Avid & DuPont); AG-1776 (a
peptidomimetic with in vitro activity against protease
inhibitor-resistant viruses; Agouron); VX-175/GW-433908 (phosphate
prodrug of amprenavir; Vertex & Glaxo Welcome); CGP61755
(Ciba); and AGENERASE.TM. (amprenavir; Glaxo Wellcome Inc.).
[0298] Additional antiretroviral agents include fusion
inhibitors/gp41 binders. Fusion inhibitors/gp41 binders include
T-20 (a peptide from residues 643-678 of the HIV gp41 transmembrane
protein ectodomain which binds to gp41 in its resting state and
prevents transformation to the fusogenic state; Trimeris) and
T-1249 (a second-generation fusion inhibitor; Trimeris).
[0299] Additional antiretroviral agents include fusion
inhibitors/chemokine receptor antagonists. Fusion
inhibitors/chemokine receptor antagonists include CXCR4 antagonists
such as AMD 3100 (a bicyclam), SDF-1 and its analogs, and ALX40-4C
(a cationic peptide), T22 (an 18 amino acid peptide; Trimeris) and
the T22 analogs T134 and T140; CCR5 antagonists such as RANTES
(9-68), AOP-RANTES, NNY-RANTES, and TAK-779; and CCR5/CXCR4
antagonists such as NSC 651016 (a distamycin analog). Also included
are CCR2B, CCR3, and CCR6 antagonists. Chemokine recpetor agonists
such as RANTES, SDF-1, MIP-1.alpha., MIP-1.beta., etc., may also
inhibit fusion.
[0300] Additional antiretroviral agents include integrase
inhibitors. Integrase inhibitors include dicaffeoylquinic (DFQA)
acids; L-chicoric acid (a dicaffeoyltartaric (DCTA) acid);
quinalizarin (QLC) and related anthraquinones; ZINTEVIR.TM. (AR
177, an oligonucleotide that probably acts at cell surface rather
than being a true integrase inhibitor; Arondex); and naphthols such
as those disclosed in WO 98/50347.
[0301] Additional antiretroviral agents include hydroxyurea-like
compounds such as BCX-34 (a purine nucleoside phosphorylase
inhibitor; Biocryst); ribonucleotide reductase inhibitors such as
DIDOX.TM. (Molecules for Health); inosine monophosphate
dehydrogenase (IMPDH) inhibitors sucha as VX-497 (Vertex); and
mycopholic acids such as CellCept (mycophenolate mofetil;
Roche).
[0302] Additional antiretroviral agents include inhibitors of viral
integrase, inhibitors of viral genome nuclear translocation such as
arylene bis(methylketone) compounds; inhibitors of HIV entry such
as AOP-RANTES, NNY-RANTES, RANTES-IgG fusion protein, soluble
complexes of RANTES and glycosaminoglycans (GAG), and AMD-3100;
nucleocapsid zinc finger inhibitors such as dithiane compounds;
targets of HIV Tat and Rev; and pharmacoenhancers such as
ABT-378.
[0303] Other antiretroviral therapies and adjunct therapies include
cytokines and lymphokines such as MIP-1.alpha., MIP-1.beta.,
SDF-1.alpha., IL-2, PROLEUKIN.TM. (aldesleukin/L2-7001; Chiron),
IL-4, IL-10, IL-12, and IL-13; interferons such as IFN-.alpha.2a;
antagonists of TNFs, NF.kappa.B, GM-CSF, M-CSF, and IL-10; agents
that modulate immune activation such as cyclosporin and prednisone;
vaccines such as Remune.TM. (HIV Immunogen), APL 400-003 (Apollon),
recombinant gp120 and fragments, bivalent (B/E) recombinant
envelope glycoprotein, rgp120CM235, MN rgp120, SF-2 rgp120,
gp120/soluble CD4 complex, Delta JR-FL protein, branched synthetic
peptide derived from discontinuous gp120 C3/C4 domain,
fusion-competent immunogens, and Gag, Pol, Nef, and Tat vaccines;
gene-based therapies such as genetic suppressor elements (GSEs; WO
98/54366), and intrakines (genetically modified CC chemokines
targetted to the ER to block surface expression of newly
synthesized CCR5 (Yang et al., PNAS 94:11567-72 (1997); Chen et
al., Nat. Med. 3:1110-16 (1997)); antibodies such as the anti-CXCR4
antibody 12G5, the anti-CCR5 antibodies 2D7, 5C7, PA8, PA9, PA10,
PA11, PA12, and PA14, the anti-CD4 antibodies Q4120 and RPA-T4, the
anti-CCR3 antibody 7B11, the anti-gp120 antibodies 17b, 48d,
447-52D, 257-D, 268-D and 50.1, anti-Tat antibodies,
anti-TNF-.alpha. antibodies, and monoclonal antibody 33A; aryl
hydrocarbon (AH) receptor agonists and antagonists such as TCDD,
3,3',4,4',5-pentachlorobiphenyl, 3,3',4,4'-tetrachlorobiphenyl, and
.alpha.-naphthoflavone (see, International Publication No. WO
98/30213); and antioxidants such as .gamma.-L-glutamyl-L-cysteine
ethyl ester (.gamma.-GCE; WO 99/56764).
[0304] In a further embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with an antiviral agent. Antiviral agents that may be administered
with the albumin fusion proteins and/or polynucleotides of the
invention include, but are not limited to, acyclovir, ribavirin,
amantadine, and remantidine.
[0305] In other embodiments, albumin fusion proteins and/or
polynucleotides of the invention may be administered in combination
with anti-opportunistic infection agents. Anti-opportunistic agents
that may be administered in combination with the albumin fusion
proteins and/or polynucleotides of the invention, include, but are
not limited to, TRIMETHOPRIM-SULFAMFTHOXAZOLE.TM., DAPSONE.TM.,
PENTAMIDINE.TM., ATOVAQUONE.TM., ISONIAZID.TM., RIFAMPIN.TM.,
PYRAZINAMIDE.TM., ETHAMBUTOL.TM., RIFABUTIN.TM.,
CLARITHROMYCIN.TM., AZITHROMYCIN.TM., GANCICLOVIR.TM.,
FOSCARNET.TM., CIDOFOVIR.TM., FLUCONAZOLE.TM., ITRACONAZOLE.TM.,
KETOCONAZOLE.TM., ACYCLOVIR.TM., FAMCICOLVIR.TM.,
PYRIMETHAMINE.TM., LEUCOVORIN.TM., NEUPOGEN.TM. (filgrastim/G-CSF),
and LEUKINE.TM. (sargramostim/GM-CSF). In a specific embodiment,
albumin fusion proteins and/or polynucleotides of the invention are
used in any combination with TRIMETHOPRIM-SULFAMETHOXAZOLE.TM.,
DAPSONE.TM., PENTAMIDINE.TM., and/or ATOVAQUONE.TM. to
prophylactically treat or prevent an opportunistic Pneumocystis
carinii pneumonia infection. In another specific embodiment,
albumin fusion proteins and/or polynucleotides of the invention are
used in any combination with ISONIAZID.TM., RIFAMPIN.TM.,
PYRAZINAMIDE.TM., and/or ETHAMBUTOL.TM. to prophylactically treat
or prevent an opportunistic Mycobacterium avium complex infection.
In another specific embodiment, albumin fusion proteins and/or
polynucleotides of the invention are used in any combination with
RIFABUTIN.TM., CLARITHROMYCIN.TM., and/or AZITHROMYCIN.TM. to
prophylactically treat or prevent an opportunistic Mycobacterium
tuberculosis infection. In another specific embodiment, albumin
fusion proteins and/or polynucleotides of the invention are used in
any combination with GANCICLOVIR.TM., FOSCARNET.TM., and/or
CIDOFOVIR.TM. to prophylactically treat or prevent an opportunistic
cytomegalovirus infection. In another specific embodiment, albumin
fusion proteins and/or polynucleotides of the invention are used in
any combination with FLUCONAZOLE.TM., ITRACONAZOLE.TM., and/or
KETOCONAZOLE.TM. to prophylactically treat or prevent an
opportunistic fungal infection. In another specific embodiment,
albumin fusion proteins and/or polynucleotides of the invention are
used in any combination with ACYCLOVIR.TM. and/or FAMCICOLVIR.TM.
to prophylactically treat or prevent an opportunistic herpes
simplex virus type I and/or type II infection. In another specific
embodiment, albumin fusion proteins and/or polynucleotides of the
invention are used in any combination with PYRIMETHAMINE.TM. and/or
LEUCOVORIN.TM. to prophylactically treat or prevent an
opportunistic Toxoplasma gondii infection. In another specific
embodiment, albumin fusion proteins and/or polynucleotides of the
invention are used in any combination with LEUCOVORIN.TM. and/or
NEUPOGEN.TM. to prophylactically treat or prevent an opportunistic
bacterial infection.
[0306] In a further embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with an antibiotic agent. Antibiotic agents that may be
administered with the albumin fusion proteins and/or
polynucleotides of the invention include, but are not limited to,
amoxicillin, beta-lactamases, aminoglycosides, beta-lactam
(glycopeptide), beta-lactamases, Clindamycin, chloramphenicol,
cephalosporins, ciprofloxacin, erythromycin, fluoroquinolones,
macrolides, metronidazole, penicillins, quinolones, rapamycin,
rifampin, streptomycin, sulfonamide, tetracyclines, trimethoprim,
trimethoprim-sulfamethoxazole, and vancomycin.
[0307] In other embodiments, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with immunestimulants. Immunostimulants that may be administered in
combination with the albumin fusion proteins and/or polynucleotides
of the invention include, but are not limited to, levamisole (e.g.,
ERGAMISOL.TM.), isoprinosine (e.g. INOSIPLEX.TM.), interferons
(e.g. interferon alpha), and interleukins (e.g., IL-2).
[0308] In other embodiments, albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with immunosuppressive agents. Immunosuppressive agents that may be
administered in combination with the albumin fusion proteins and/or
polynucleotides of the invention include, but are not limited to,
steroids, cyclosporine, cyclosporine analogs, cyclophosphamide
methylprednisone, prednisone, azathioprine, FK-506,
15-deoxyspergualin, and other immunosuppressive agents that act by
suppressing the function of responding T cells. Other
immunosuppressive agents that may be administered in combination
with the albumin fusion proteins and/or polynucleotides of the
invention include, but are not limited to, prednisolone,
methotrexate, thalidomide, methoxsalen, rapamycin, leflunomide,
mizoribine (BREDININ.TM.), brequinar, deoxyspergualin, and
azaspirane (SKF 105685), ORTHOCLONE OKT.RTM. 3 (muromonab-CD3),
SANDIMMUNE.TM., NEORAL.TM., SANGDYA.TM. (cyclosporine),
PROGRAF.RTM. (FK506, tacrolimus), CELLCEPT.RTM. (mycophenolate
motefil, of which the active metabolite is mycophenolic acid),
IMURAN.TM. (azathioprine), glucocorticosteroids, adrenocortical
steroids such as DELTASONE.TM. (prednisone) and HYDELTRASOL.TM.
(prednisolone), FOLEX.TM. and MEXATE.TM. (methotrxate),
OXSORALEN-ULTRA.TM. (methoxsalen) and RAPAMUNE.TM. (sirolimus). In
a specific embodiment, immunosuppressants may be used to prevent
rejection of organ or bone marrow transplantation.
[0309] In an additional embodiment, albumin fusion proteins and/or
polynucleotides of the invention are administered alone or in
combination with one or more intravenous immune globulin
preparations. Intravenous immune globulin preparations that may be
administered with the albumin fusion proteins and/or
polynucleotides of the invention include, but not limited to,
GAMMAR.TM., IVEEGAM.TM., SANDOGLOBULIN.TM., GAMMAGARD S/D.TM.,
ATGAM.TM. (antithymocyte glubulin), and GAMIMUNE.TM.. In a specific
embodiment, albumin fusion proteins and/or polynucleotides of the
invention are administered in combination with intravenous immune
globulin preparations in transplantation therapy (e.g., bone marrow
transplant).
[0310] In certain embodiments, the albumin fusion proteins and/or
polynucleotides of the invention are administered alone or in
combination with an anti-inflammatory agent. Anti-inflammatory
agents that may be administered with the albumin fusion proteins
and/or polynucleotides of the invention include, but are not
limited to, corticosteroids (e.g. betamethasone, budesonide,
cortisone, dexamethasone, hydrocortisone, methylprednisolone,
prednisolone, prednisone, and triamcinolone), nonsteroidal
anti-inflammatory drugs (e.g., diclofenac, diflunisal, etodolac,
fenoprofen, floctafenine, flurbiprofen, ibuprofen, indomethacin,
ketoprofen, meclofenamate, mefenamic acid, meloxicam, nabumetone,
naproxen, oxaprozin, phenylbutazone, piroxicam, sulindac,
tenoxicam, tiaprofenic acid, and tolmetin.), as well as
antihistamines, aminoarylcarboxylic acid derivatives, arylacetic
acid derivatives, arylbutyric acid derivatives, arylcarboxylic
acids, arylpropionic acid derivatives, pyrazoles, pyrazolones,
salicylic acid derivatives, thiazinecarboxamides,
e-acetamidocaproic acid, S-adenosylmethionine,
3-amino-4-hydroxybutyric acid, amixetrine, bendazac, benzydamine,
bucolome, difenpiramide, ditazol, emorfazone, guaiazulene,
nabumetone, nimesulide, orgotein, oxaceprol, paranyline, perisoxal,
pifoxime, proquazone, proxazole, and tenidap.
[0311] In an additional embodiment, the compositions of the
invention are administered alone or in combination with an
anti-angiogenic agent. Anti-angiogenic agents that may be
administered with the compositions of the invention include, but
are not limited to, Angiostatin (Entremed, Rockville, Md.),
Troponin-1 (Boston Life Sciences, Boston, Mass.), anti-Invasive
Factor, retinoic acid and derivatives thereof, paclitaxel (Taxol),
Suramin, Tissue Inhibitor of Metalloproteinase-1, Tissue Inhibitor
of Metalloproteinase-2, VEGI, Plasminogen Activator Inhibitor-1,
Plasminogen Activator Inhibitor-2, and various forms of the lighter
"d group" transition metals.
[0312] Lighter "d group" transition metals include, for example,
vanadium, molybdenum, tungsten, titanium, niobium, and tantalum
species. Such transition metal species may form transition metal
complexes. Suitable complexes of the above-mentioned transition
metal species include oxo transition metal complexes.
[0313] Representative examples of vanadium complexes include oxo
vanadium complexes such as vanadate and vanadyl complexes. Suitable
vanadate complexes include metavanadate and orthovanadate complexes
such as, for example, ammonium metavanadate, sodium metavanadate,
and sodium orthovanadate. Suitable vanadyl complexes include, for
example, vanadyl acetylacetonate and vanadyl sulfate including
vanadyl sulfate hydrates such as vanadyl sulfate mono- and
trihydrates.
[0314] Representative examples of tungsten and molybdenum complexes
also include oxo complexes. Suitable oxo tungsten complexes include
tungstate and tungsten oxide complexes. Suitable tungstate
complexes include ammonium tungstate, calcium tungstate, sodium
tungstate dihydrate, and tungstic acid. Suitable tungsten oxides
include tungsten (IV) oxide and tungsten (VI) oxide. Suitable oxo
molybdenum complexes include molybdate, molybdenum oxide, and
molybdenyl complexes. Suitable molybdate complexes include ammonium
molybdate and its hydrates, sodium molybdate and its hydrates, and
potassium molybdate and its hydrates. Suitable molybdenum oxides
include molybdenum (VI) oxide, molybdenum (VI) oxide, and molybdic
acid. Suitable molybdenyl complexes include, for example,
molybdenyl acetylacetonate. Other suitable tungsten and molybdenum
complexes include hydroxo derivatives derived from, for example,
glycerol, tartaric acid, and sugars.
[0315] A wide variety of other anti-angiogenic factors may also be
utilized within the context of the present invention.
Representative examples include, but are not limited to, platelet
factor 4; protamine sulphate; sulphated chitin derivatives
(prepared from queen crab shells), (Murata et al., Cancer Res.
51:22-26, (1991)); Sulphated Polysaccharide Peptidoglycan Complex
(SP-PG) (the function of this compound may be enhanced by the
presence of steroids such as estrogen, and tamoxifen citrate);
Staurosporine; modulators of matrix metabolism, including for
example, proline analogs, cishydroxyproline,
d,L-3,4-dehydroproline, Thiaproline, alpha,alpha-dipyridyl,
aminopropionitrile fumarate;
4-propyl-5-(4-pyridinyl)-2(3H)-oxazolone; Methotrexate;
Mitoxantrone; Heparin; Interferons; 2 Macroglobulin-serum; ChIMP-3
(Pavloff et al., J. Bio. Chem. 267:17321-17326, (1992));
Chymostatin (Tomkinson et al., Biochem J. 286:475-480, (1992));
Cyclodextrin Tetradecasulfate; Eponemycin; Camptothecin; Fumagillin
(Ingber et al., Nature 348:555-557, (1990)); Gold Sodium Thiomalate
("GST"; Matsubara and Ziff, J. Clin. Invest. 79:1440-1446, (1987));
anticollagenase-serum; alpha2-antiplasmin (Holmes et al., J. Biol.
Chem. 262(4):1659-1664, (1987)); Bisantrene (National Cancer
Institute); Lobenzarit disodium
(N-(2)-carboxyphenyl-4-chloroanthronilic acid disodium or "CCA";
(Takeuchi et al., Agents Actions 36:312-316, (1992)); and
metalloproteinase inhibitors such as BB94.
[0316] Additional anti-angiogenic factors that may also be utilized
within the context of the present invention include Thalidomide,
(Celgene, Warren, N.J.); Angiostatic steroid; AGM-1470 (H. Brem and
J. Folkman J Pediatr. Surg. 28:445-51 (1993)); an integrin alpha v
beta 3 antagonist (C. Storgard et al., J Clin. Invest. 103:47-54
(1999)); carboxynaminolmidazole; Carboxyamidotriazole (CAI)
(National Cancer Institute, Bethesda, Md.); Conbretastatin A4
(CA4P) (OXiGENE, Boston, Mass.); Squalamine (Magainin
Pharmaceuticals, Plymouth Meeting, Pa.); TNP-470, (Tap
Pharmaceuticals, Deerfield, Ill.); ZD-0101 AstraZeneca (London,
UK); APRA (CT2584); Benefin, Byrostatin-1 (SC339555); CGP-41251
(PKC 412); CM101; Dexrazoxane (ICRF187); DMXAA; Endostatin;
Flavopridiol; Genestein; GTE; ImmTher; Iressa (ZD1839); Octreotide
(Somatostatin); Panretin; Penacillamine; Photopoint; PI-88;
Prinomastat (AG-3340) Purlytin; Suradista (FCE26644); Tamoxifen
(Nolvadex); Tazarotene; Tetrathiomolybdate; Xeloda (Capecitabine);
and 5-Fluorouracil.
[0317] Anti-angiogenic agents that may be administed in combination
with the compounds of the invention may work through a variety of
mechanisms including, but not limited to, inhibiting proteolysis of
the extracellular matrix, blocking the function of endothelial
cell-extracellular matrix adhesion molecules, by antagonizing the
function of angiogenesis inducers such as growth factors, and
inhibiting integrin receptors expressed on proliferating
endothelial cells. Examples of anti-angiogenic inhibitors that
interfere with extracellular matrix proteolysis and which may be
administered in combination with the compositons of the invention
include, but are not limited to, AG-3340 (Agouron, La Jolla,
Calif.), BAY-12-9566 (Bayer, West Haven, Conn.), BMS-275291
(Bristol Myers Squibb, Princeton, N.J.), CGS-27032A (Novartis, East
Hanover, N.J.), Marimastat (British Biotech, Oxford, UK), and
Metastat (Aeterna, St-Foy, Quebec). Examples of anti-angiogenic
inhibitors that act by blocking the function of endothelial
cell-extracellular matrix adhesion molecules and which may be
administered in combination with the compositons of the invention
include, but are not limited to, EMD-121974 (Merck KcgaA Darmstadt,
Germany) and Vitaxin (Ixsys, La Jolla, Calif./Medimmune,
Gaithersburg, Md.). Examples of anti-angiogenic agents that act by
directly antagonizing or inhibiting angiogenesis inducers and which
may be administered in combination with the compositons of the
invention include, but are not limited to, Angiozyme (Ribozyme,
Boulder, Colo.), Anti-VEGF antibody (Genentech, S. San Francisco,
Calif.), PTK-787/ZK-225846 (Novartis, Basel, Switzerland), SU-101
(Sugen, S. San Francisco, Calif.), SU-5416 (Sugen/Pharmacia Upjohn,
Bridgewater, N.J.), and SU-6668 (Sugen). Other anti-angiogenic
agents act to indirectly inhibit angiogenesis. Examples of indirect
inhibitors of angiogenesis which may be administered in combination
with the compositons of the invention include, but are not limited
to, IM-862 (Cytran, Kirkland, Wash.), Interferon-alpha, IL-12
(Roche, Nutley, N.J.), and Pentosan polysulfate (Georgetown
University, Washington, D.C.).
[0318] In particular embodiments, the use of compositions of the
invention in combination with anti-angiogenic agents is
contemplated for the treatment, prevention, and/or amelioration of
an autoimmune disease, such as for example, an autoimmune disease
described herein.
[0319] In a particular embodiment, the use of compositions of the
invention in combination with anti-angiogenic agents is
contemplated for the treatment, prevention, and/or amelioration of
arthritis. In a more particular embodiment, the use of compositions
of the invention in combination with anti-angiogenic agents is
contemplated for the treatment, prevention, and/or amelioration of
rheumatoid arthritis.
[0320] In another embodiment, the polynucleotides encoding a
polypeptide of the present invention are administered in
combination with an angiogenic protein, or polynucleotides encoding
an angiogenic protein. Examples of angiogenic proteins that may be
administered with the compositions of the invention include, but
are not limited to, acidic and basic fibroblast growth factors,
VEGF-1, VEGF-2, VEGF-3, epidermal growth factor alpha and beta,
platelet-derived endothelial cell growth factor, platelet-derived
growth factor, tumor necrosis factor alpha, hepatocyte growth
factor, insulin-like growth factor, colony stimulating factor,
macrophage colony stimulating factor, granulocyte/macrophage colony
stimulating factor, and nitric oxide synthase.
[0321] In additional embodiments, compositions of the invention are
administered in combination with a chemotherapeutic agent.
Chemotherapeutic agents that may be administered with the albumin
fusion proteins and/or polynucleotides of the invention include,
but are not limited to alkylating agents such as nitrogen mustards
(for example, Mechlorethamine, cyclophosphamide, Cyclophosphamide
Ifosfamide, Melphalan (L-sarcolysin), and Chlorambucil),
ethylenimines and methylmelamines (for example, Hexamethylmelamine
and Thiotepa), alkyl sulfonates (for example, Busulfan),
nitrosoureas (for example, Carmustine (BCNU), Lomustine (CCNU),
Semustine (methyl-CCNU), and Streptozocin (streptozotocin)),
triazenes (for example, Dacarbazine (DTIC;
dimethyltriazenoimidazolecarboxamide)), folic acid analogs (for
example, Methotrexate (amethopterin)), pyrimidine analogs (for
example, Fluorouacil (5-fluorouracil; 5-FU), Floxuridine
(fluorodeoxyuridine; FudR), and Cytarabine (cytosine arabinoside)),
purine analogs and related inhibitors (for example, Mercaptopurine
(6-mercaptopurine; 6-MP), Thioguanine (6-thioguanine; TG), and
Pentostatin (2'-deoxycoformycin)), vinca alkaloids (for example,
Vinblastine (VLB, vinblastine sulfate)) and Vincristine
(vincristine sulfate)), epipodophyllotoxins (for example, Etoposide
and Teniposide), antibiotics (for example, Dactinomycin
(actinomycin D), Daunorubicin (daunomycin; rubidomycin),
Doxorubicin, Bleomycin, Plicamycin (mithramycin), and Mitomycin
(mitomycin C), enzymes (for example, L-Asparaginase), biological
response modifiers (for example, Interferon-alpha and
interferon-alpha-2b), platinum coordination compounds (for example,
Cisplatin (cis-DDP) and Carboplatin), anthracenedione
(Mitoxantrone), substituted ureas (for example, Hydroxyurea),
methylhydrazine derivatives (for example, Procarbazine
(N-methylhydrazine; MIH), adrenocorticosteroids (for example,
Prednisone), progestins (for example, Hydroxyprogesterone caproate,
Medroxyprogesterone, Medroxyprogesterone acetate, and Megestrol
acetate), estrogens (for example, Diethylstilbestrol (DES),
Diethylstilbestrol diphosphate, Estradiol, and Ethinyl estradiol),
antiestrogens (for example, Tamoxifen), androgens (Testosterone
proprionate, and Fluoxymesterone), antiandrogens (for example,
Flutamide), gonadotropin-releasing horomone analogs (for example,
Leuprolide), other hormones and hormone analogs (for example,
methyltestosterone, estramustine, estramustine phosphate sodium,
chlorotrianisene, and testolactone), and others (for example,
dicarbazine, glutamic acid, and mitotane).
[0322] In one embodiment, the compositions of the invention are
administered in combination with one or more of the following
drugs: infliximab (also known as Remicade.TM. Centocor, Inc.),
Trocade (Roche, RO-32-3555), Leflunomide (also known as Arava.TM.
from Hoechst Marion Roussel), Kineret.TM. (an IL-1 Receptor
antagonist also known as Anakinra from Amgen, Inc.)
[0323] In a specific embodiment, compositions of the invention are
administered in combination with CHOP (cyclophosphamide,
doxorubicin, vincristine, and prednisone) or combination of one or
more of the components of CHOP. In one embodiment, the compositions
of the invention are administered in combination with anti-CD20
antibodies, human monoclonal anti-CD20 antibodies. In another
embodiment, the compositions of the invention are administered in
combination with anti-CD20 antibodies and CHOP, or anti-CD20
antibodies and any combination of one or more of the components of
CHOP, particularly cyclophosphamide and/or prednisone. In a
specific embodiment, compositions of the invention are administered
in combination with Rituximab. In a further embodiment,
compositions of the invention are administered with Rituximab and
CHOP, or Rituximab and any combination of one or more of the
components of CHOP, particularly cyclophosphamide and/or
prednisone. In a specific embodiment, compositions of the invention
are administered in combination with tositumomab. In a further
embodiment, compositions of the invention are administered with
tositumomab and CHOP, or tositumomab and any combination of one or
more of the components of CHOP, particularly cyclophosphamide
and/or prednisone. The anti-CD20 antibodies may optionally be
associated with radioisotopes, toxins or cytotoxic prodrugs.
[0324] In another specific embodiment, the compositions of the
invention are administered in combination Zevalin.TM.. In a further
embodiment, compositions of the invention are administered with
Zevalin.TM. and CHOP, or Zevalin.TM. and any combination of one or
more of the components of CHOP, particularly cyclophosphamide
and/or prednisone. Zevalin.TM. may be associated with one or more
radisotopes. Particularly preferred isotopes are .sup.90Y and
.sup.111In.
[0325] In an additional embodiment, the albumin fusion proteins
and/or polynucleotides of the invention are administered in
combination with cytokines. Cytokines that may be administered with
the albumin fusion proteins and/or polynucleotides of the invention
include, but are not limited to, IL2, IL3, IL4, IL5, IL6, IL7,
IL10, IL12, IL13, IL15, anti-CD40, CD40L, IFN-gamma and TNF-alpha.
In another embodiment, albumin fusion proteins and/or
polynucleotides of the invention may be administered with any
interleukin, including, but not limited to, IL-1alpha, IL-1beta,
IL-2, IL-3, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-11,
IL-12, IL-13, IL-14, IL-15, IL-16, IL-17, IL-18, IL-19, IL-20, and
IL-21.
[0326] In one embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with members of the TNF family. TNF, TNF-related or TNF-like
molecules that may be administered with the albumin fusion proteins
and/or polynucleotides of the invention include, but are not
limited to, soluble forms of TNF-alpha, lymphotoxin-alpha
(LT-alpha, also known as TNF-beta), LT-beta (found in complex
heterotrimer LT-alpha2-beta), OPGL, FasL, CD27L, CD30L, CD40L,
4-1BBL, DcR3, OX40L, TNF-gamma (International Publication No. WO
96/14328), AIM-I (International Publication No. WO 97/33899),
endokine-alpha (International Publication No. WO 98/07880), OPG,
and neutrokine-alpha (International Publication No. WO 98/18921,
OX40, and nerve growth factor (NGF), and soluble forms of Fas,
CD30, CD27, CD40 and 4-IBB, TR2 (International Publication No. WO
96/34095), DR3 (International Publication No. WO 97/33904), DR4
(International Publication No. WO 98/32856), TR5 (International
Publication No. WO 98/30693), TRANK, TR9 (International Publication
No. WO 98/56892),TR10 (International Publication No. WO 98/54202),
312C2 (International Publication No. WO 98/06842), and TR12, and
soluble forms CD154, CD70, and CD153.
[0327] In an additional embodiment, the albumin fusion proteins
and/or polynucleotides of the invention are administered in
combination with angiogenic proteins. Angiogenic proteins that may
be administered with the albumin fusion proteins and/or
polynucleotides of the invention include, but are not limited to,
Glioma Derived Growth Factor (GDGF), as disclosed in European
Patent Number EP-399816; Platelet Derived Growth Factor-A (PDGF-A),
as disclosed in European Patent Number EP-682110; Platelet Derived
Growth Factor-B (PDGF-B), as disclosed in European Patent Number
EP-282317; Placental Growth Factor (PIGF), as disclosed in
International Publication Number WO 92/06194; Placental Growth
Factor-2 (PIGF-2), as disclosed in Hauser et al., Growth Factors,
4:259-268 (1993); Vascular Endothelial Growth Factor (VEGF), as
disclosed in International Publication Number WO 90/13649; Vascular
Endothelial Growth Factor-A (VEGF-A), as disclosed in European
Patent Number EP-506477; Vascular Endothelial Growth Factor-2
(VEGF-2), as disclosed in International Publication Number WO
96/39515; Vascular Endothelial Growth Factor B (VEGF-3); Vascular
Endothelial Growth Factor B-186 (VEGF-B186), as disclosed in
International Publication Number WO 96/26736; Vascular Endothelial
Growth Factor-D (VEGF-D), as disclosed in International Publication
Number WO 98/02543; Vascular Endothelial Growth Factor-D (VEGF-D),
as disclosed in International Publication Number WO 98/07832; and
Vascular Endothelial Growth Factor-E (VEGF-E), as disclosed in
German Patent Number DE19639601. The above mentioned references are
herein incorporated by reference in their entireties.
[0328] In an additional embodiment, the albumin fusion proteins
and/or polynucleotides of the invention are administered in
combination with Fibroblast Growth Factors. Fibroblast Growth
Factors that may be administered with the albumin fusion proteins
and/or polynucleotides of the invention include, but are not
limited to, FGF-1, FGF-2, FGF-3, FGF-4, FGF-5, FGF-6, FGF-7, FGF-8,
FGF-9, FGF-10, FGF-11, FGF-12, FGF-13, FGF-14, and FGF-15.
[0329] In an additional embodiment, the albumin fusion proteins
and/or polynucleotides of the invention are administered in
combination with hematopoietic growth factors. Hematopoietic growth
factors that may be administered with the albumin fusion proteins
and/or polynucleotides of the invention include, but are not
limited to, granulocyte macrophage colony stimulating factor
(GM-CSF) (sargramostim, LEUKINE.TM., PROKINE.TM.), granulocyte
colony stimulating factor (G-CSF) (filgrastim, NEUPOGEN.TM.),
macrophage colony stimulating factor (M-CSF, CSF-1) erythropoietin
(epoetin alfa, EPOGEN.TM., PROCRIT.TM.), stem cell factor (SCF,
c-kit ligand, steel factor), megakaryocyte colony stimulating
factor, PIXY321 (a GMCSF/IL-3 fusion protein), interleukins,
especially any one or more of IL-1 through IL-12, interferon-gamma,
or thrombopoietin.
[0330] In certain embodiments, albumin fusion proteins and/or
polynucleotides of the present invention are administered in
combination with adrenergic blockers, such as, for example,
acebutolol, atenolol, betaxolol, bisoprolol, carteolol, labetalol,
metoprolol, nadolol, oxprenolol, penbutolol, pindolol, propranolol,
sotalol, and timolol.
[0331] In another embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with an antiarrhythmic drug (e.g., adenosine, amidoarone,
bretylium, digitalis, digoxin, digitoxin, diliazem, disopyramide,
esmolol, flecainide, lidocaine, mexiletine, moricizine, phenytoin,
procainamide, N-acetyl procainamide, propafenone, propranolol,
quinidine, sotalol, tocainide, and verapamil).
[0332] In another embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with diuretic agents, such as carbonic anhydrase-inhibiting agents
(e.g., acetazolamide, dichlorphenamide, and methazolamide), osmotic
diuretics (e.g., glycerin, isosorbide, mannitol, and urea),
diuretics that inhibit Na.sup.+-K.sup.+-2Cl.sup.-symport (e.g.,
furosemide, bumetanide, azosemide, piretanide, tripamide,
ethacrynic acid, muzolimine, and torsemide), thiazide and
thiazide-like diuretics (e.g., bendroflumethiazide, benzthiazide,
chlorothiazide, hydrochlorothiazide, hydroflumethiazide,
methyclothiazide, polythiazide, trichormethiazide, chlorthalidone,
indapamide, metolazone, and quinethazone), potassium sparing
diuretics (e.g., amiloride and triamterene), and mineralcorticoid
receptor antagonists (e.g., spironolactone, canrenone, and
potassium canrenone).
[0333] In one embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with treatments for endocrine and/or hormone imbalance disorders.
Treatments for endocrine and/or hormone imbalance disorders
include, but are not limited to, .sup.127I, radioactive isotopes of
iodine such as .sup.131I and .sup.123I; recombinant growth hormone,
such as HUMATROPE.TM. (recombinant somatropin); growth hormone
analogs such as PROTROPIN.TM. (somatrem); dopamine agonists such as
PARLODEL.TM. (bromocriptine); somatostatin analogs such as
SANDOSTATIN.TM. (octreotide); gonadotropin preparations such as
PREGNYL.TM., A.P.L..TM. and PROFASI.TM. (chorionic gonadotropin
(CG)), PERGONAL.TM. (menotropins), and METRODIN.TM. (urofollitropin
(uFSH)); synthetic human gonadotropin releasing hormone
preparations such as FACTREL.TM. and LUTREPULSE.TM. (gonadorelin
hydrochloride); synthetic gonadotropin agonists such as LUPRON.TM.
(leuprolide acetate), SUPPRELIN.TM. (histrelin acetate),
SYNAREL.TM. (nafarelin acetate), and ZOLADEX.TM. (goserelin
acetate); synthetic preparations of thyrotropin-releasing hormone
such as RELEFACT TRH.TM. and THYPINONE.TM. (protirelin);
recombinant human TSH such as THYROGEN.TM.; synthetic preparations
of the sodium salts of the natural isomers of thyroid hormones such
as L-T.sub.4.TM., SYNTHROID.TM. and LEVOTHROID.TM. (levothyroxine
sodium), L-T.sub.3.TM., CYTOMEL.TM. and TRIOSTAT.TM. (liothyroine
sodium), and THYROLAR.TM. (liotrix); antithyroid compounds such as
6-n-propylthiouracil (propylthiouracil),
1-methyl-2-mercaptoimidazole and TAPAZOLE.TM. (methimazole),
NEO-MERCAZOLE.TM. (carbimazole); beta-adrenergic receptor
antagonists such as propranolol and esmolol; Ca.sup.2+ channel
blockers; dexamethasone and iodinated radiological contrast agents
such as TELEPAQUE.TM. (iopanoic acid) and ORAGRAFIN.TM. (sodium
ipodate).
[0334] Additional treatments for endocrine and/or hormone imbalance
disorders include, but are not limited to, estrogens or congugated
estrogens such as ESTRACE.TM. (estradiol), ESTINYL.TM. (ethinyl
estradiol), PREMARIN.TM., ESTRATAB.TM., ORTHO-EST.TM., OGEN.TM. and
estropipate (estrone), ESTROVIS.TM. (quinestrol), ESTRADERM.TM.
(estradiol), DELESTROGEN.TM. and VALERGEN.TM. (estradiol valerate),
DEPO-ESTRADIOL CYPIONATE.TM. and ESTROJECT LA.TM. (estradiol
cypionate); antiestrogens such as NOLVADEX.TM. (tamoxifen),
SEROPHENE.TM. and CLOMID.TM. (clomiphene); progestins such as
DURALUTIN.TM. (hydroxyprogesterone caproate), MPA.TM. and
DEPO-PROVERA.TM. (medroxyprogesterone acetate), PROVERA.TM. and
CYCRIN.TM. (MPA), MEGACE.TM. (megestrol acetate), NORLUTIN.TM.
(norethindrone), and NORLUTATE.TM. and AYGESTIN.TM. (norethindrone
acetate); progesterone implants such as NORPLANT SYSTEM.TM.
(subdermal implants of norgestrel); antiprogestins such as RU
486.TM. (mifepristone); hormonal contraceptives such as ENOVID.TM.
(norethynodrel plus mestranol), PROGESTASERT.TM. (intrauterine
device that releases progesterone), LOESTRIN.TM., BREVICON.TM.,
MODICON.TM. GENORA.TM., NELONA.TM., NORINYL.TM., OVACON-35.TM. and
OVACON-50.TM. (ethinyl estradiol/norethindrone), LEVLEN.TM.,
NORDETTE.TM., TRI-LEVLEN.TM. and TRIPHASIL-21.TM. (ethinyl
estradiol/levonorgestrel) LO/OVRAL.TM. and OVRAL.TM. (ethinyl
estradiol/norgestrel), DEMULEN.TM. (ethinyl estradiol/ethynodiol
diacetate), NORINYL.TM., ORTHO-NOVUM.TM., NORETHIN.TM., GENORA.TM.,
and NELOVA.TM. (norethindrone/mestranol), DESOGEN.TM. and
ORTHO-CEPT.TM. (ethinyl estradiol/desogestrel), ORTHO-CYCLEN.TM.
and ORTHO-TRICYCLEN.TM. (ethinyl estradiol/norgestimate),
MICRONOR.TM. and NOR-QD.TM. (norethindrone), and OVRETTE.TM.
(norgestrel).
[0335] Additional treatments for endocrine and/or hormone imbalance
disorders include, but are not limited to, testosterone esters such
as methenolone acetate and testosterone undecanoate; parenteral and
oral androgens such as TESTOJECT-50.TM. (testosterone), TESTEX.TM.
(testosterone propionate), DELATESTRYL.TM. (testosterone
enanthate), DEPO-TESTROSTSERONE.TM. (testosterone cypionate),
DANOCRINE.TM. (danazol), HALOTESTIN.TM. (fluoxymesterone), ORETON
METHYL.TM., TESTRED.TM. and VIRILON.TM. (methyltestosterone), and
OXANDRIN.TM. (oxandrolone); testosterone transdermal systems such
as TESTODERM.TM.; androgen receptor antagonist and
5-alpha-reductase inhibitors such as ANDROCUR.TM. (cyproterone
acetate), EULEXIN.TM. (flutamide), and PROSCAR.TM. (finasteride);
adrenocorticotropic hormone preparations such as CORTROSYN.TM.
(cosyntropin); adrenocortical steroids and their synthetic analogs
such as ACLOVATE.TM. (alclometasone dipropionate), CYCLOCORT.TM.
(amcinonide), BECLOVENT.TM. and VANCERIL.TM. (beclomethasone
dipropionate), CELESTONE.TM. (betamethasone), BENISONE.TM. and
UTICORT.TM. (betamethasone benzoate), DIPROSONE.TM. (betamethasone
dipropionate), CELESTONE PHOSPHATE.TM. (betamethasone sodium
phosphate), CELESTONE SOLUSPAN.TM. (betamethasone sodium phosphate
and acetate), BETA-VAL.TM. and VALISONE.TM. (betamethasone
valerate), TEMOVATE.TM. (clobetasol propionate), CLODERM.TM.
(clocortolone pivalate), CORTEF.TM. and HYDROCORTONE.TM. (cortisol
(hydrocortisone)), HYDROCORTONE ACEATE.TM. (cortisol
(hydrocortisone) acetate), LOCOID.TM. (cortisol (hydrocortisone)
butyrate), HYDROCORTONE PHOSPHATE.TM. (cortisol (hydrocortisone)
sodium phosphate), A-HYDROCORT.TM. and SOLU CORTEF.TM. (cortisol
(hydrocortisone) sodium succinate), WESTCORT.TM. (cortisol
(hydrocortisone) valerate), CORTISONE ACETATE.TM. (cortisone
acetate), DESOWEN.TM. and TRIDESILON.TM. (desonide), TOPICORT.TM.
(desoximetasone), DECADRON.TM. (dexamethasone), DECADRON LA.TM.
(dexamethasone acetate), DECADRON PHOSPHATE.TM. and HEXADROL
PHOSPHATE.TM. (dexamethasone sodium phosphate), FLORONE.TM. and
MAXIFLOR.TM. (diflorasone diacetate), FLORINEF ACETATE.TM.
(fludrocortisone acetate), AEROBID.TM. and NASALIDE.TM.
(flunisolide), FLUONID.TM. and SYNALAR.TM. (fluocinolone
acetonide), LIDEX.TM. (fluocinonide), FLUOR-OP.TM. and FML.TM.
(fluorometholone), CORDRAN.TM. (flurandrenolide), HALOG.TM.
(halcinonide), HMS LIZUIFILM.TM. (medrysone), MEDROL.TM.
(methylprednisolone), DEPO-MEDROL.TM. and MEDROL ACETATE.TM.
(methylprednisone acetate), A-METHAPRED.TM. and SOLUMFDROL.TM.
(methylprednisolone sodium succinate), ELOCON.TM. (mometasone
furoate), HALDRONE.TM. (paramethasone acetate), DELTA-CORTEF.TM.
(prednisolone), ECONOPRED.TM. (prednisolone acetate),
HYDELTRASOL.TM. (prednisolone sodium phosphate), HYDELTRA-T.B.A.TM.
(prednisolone tebutate), DELTASONE.TM. (prednisone), ARISTOCORT.TM.
and KENACORT.TM. (triamcinolone), KENALOG.TM. (triamcinolone
acetonide), ARISTOCORT.TM. and KENACORT DIACETATE.TM.
(triamcinolone diacetate), and ARISTOSPAN.TM. (triamcinolone
hexacetonide); inhibitors of biosynthesis and action of
adrenocortical steroids such as CYTADREN.TM. (aminoglutethimide),
NIZORAL.TM. (ketoconazole), MODRASTANE.TM. (trilostane), and
METOPIRONE.TM. (metyrapone); bovine, porcine or human insulin or
mixtures thereof; insulin analogs; recombinant human insulin such
as HUMULIN.TM. and NOVOLIN.TM.; oral hypoglycemic agents such as
ORAMIDE.TM. and ORINASE.TM. (tolbutamide), DIABINESE.TM.
(chlorpropamide), TOLAMIDE.TM. and TOLINASE.TM. (tolazamide),
DYMELOR.TM. (acetohexamide), glibenclamide, MICRONASE.TM.,
DIBETA.TM. and GLYNASE.TM. (glyburide), GLUCOTROL.TM. (glipizide),
and DIAMICRON.TM. (gliclazide), GLUCOPHAGE.TM. (metformin),
ciglitazone, pioglitazone, and alpha-glucosidase inhibitors; bovine
or porcine glucagon; somatostatins such as SANDOSTATIN.TM.
(octreotide); and diazoxides such as PROGLYCEM.TM. (diazoxide).
[0336] In one embodiment, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with treatments for uterine motility disorders. Treatments for
uterine motility disorders include, but are not limited to,
estrogen drugs such as conjugated estrogens (e.g., PREMARIN.RTM.
and ESTRATAB.RTM.), estradiols (e.g., CLIMARA.RTM. and ALORA.RTM.),
estropipate, and chlorotrianisene; progestin drugs (e.g., AMEN.RTM.
(medroxyprogesterone), MICRONOR.RTM. (norethidrone acetate),
PROMETRIUM.RTM. progesterone, and megestrol acetate); and
estrogen/progesterone combination therapies such as, for example,
conjugated estrogens/medroxyprogesterone (e.g., PREMPRO.TM. and
PREMPHASE.RTM.) and norethindrone acetate/ethinyl estsradiol (e.g.,
FEMHRT.TM.).
[0337] In an additional embodiment, the albumin fusion proteins
and/or polynucleotides of the invention are administered in
combination with drugs effective in treating iron deficiency and
hypochromic anemias, including but not limited to, ferrous sulfate
(iron sulfate, FEOSOL.TM.), ferrous fumarate (e.g., FEOSTAT.TM.),
ferrous gluconate (e.g., FERGON.TM.), polysaccharide-iron complex
(e.g., NIFEREX.TM.), iron dextran injection (e.g., INFEED.TM.),
cupric sulfate, pyroxidine, riboflavin, Vitamin B.sub.12,
cyancobalamin injection (e.g., REDISOL.TM., RUBRAMIN PC.TM.),
hydroxocobalamin, folic acid (e.g., FOLVITE.TM.), leucovorin
(folinic acid, 5-CHOH4PteGlu, citrovorum factor) or WELLCOVORIN
(Calcium salt of leucovorin), transferrin or ferritin.
[0338] In certain embodiments, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with agents used to treat psychiatric disorders. Psychiatric drugs
that may be administered with the albumin fusion proteins and/or
polynucleotides of the invention include, but are not limited to,
antipsychotic agents (e.g., chlorpromazine, chlorprothixene,
clozapine, fluphenazine, haloperidol, loxapine, mesoridazine,
molindone, olanzapine, perphenazine, pimozide, quetiapine,
risperidone, thioridazine, thiothixene, trifluoperazine, and
triflupromazine), antimanic agents (e.g., carbamazepine, divalproex
sodium, lithium carbonate, and lithium citrate), antidepressants
(e.g., amitriptyline, amoxapine, bupropion, citalopram,
clomipramine, desipramine, doxepin, fluvoxamine, fluoxetine,
imipramine, isocarboxazid, maprotiline, mirtazapine, nefazodone,
nortriptyline, paroxetine, phenelzine, protriptyline, sertraline,
tranylcypromine, trazodone, trimipramine, and venlafaxine),
antianxiety agents (e.g., alprazolam, buspirone, chlordiazepoxide,
clorazepate, diazepam, halazepam, lorazepam, oxazepam, and
prazepam), and stimulants (e.g., d-amphetamine, methylphenidate,
and pemoline).
[0339] In other embodiments, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with agents used to treat neurological disorders. Neurological
agents that may be administered with the albumin fusion proteins
and/or polynucleotides of the invention include, but are not
limited to, antiepileptic agents (e.g., carbamazepine, clonazepam,
ethosuximide, phenobarbital, phenytoin, primidone, valproic acid,
divaiproex sodium, felbamate, gabapentin, lamotrigine,
levetiracetam, oxcarbazepine, tiagabine, topiramate, zonisamide,
diazepam, lorazepam, and clonazepam), antiparkinsonian agents
(e.g., levodopa/carbidopa, selegiline, amantidine, bromocriptine,
pergolide, ropinirole, pramipexole, benztropine; biperiden;
ethopropazine; procyclidine; trihexyphenidyl, tolcapone), and ALS
therapeutics (e.g. riluzole).
[0340] In another embodiment, albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with vasodilating agents and/or calcium channel blocking agents.
Vasodilating agents that may be administered with the albumin
fusion proteins and/or polynucleotides of the invention include,
but are not limited to, Angiotensin Converting Enzyme (ACE)
inhibitors (e.g., papaverine, isoxsuprine, benazepril, captopril,
cilazapril, enalapril, enalaprilat, fosinopril, lisinopril,
moexipril, perindopril, quinapril, ramipril, spirapril,
trandolapril, and nylidrin), and nitrates (e.g., isosorbide
dinitrate, isosorbide mononitrate, and nitroglycerin). Examples of
calcium channel blocking agents that may be administered in
combination with the albumin fusion proteins and/or polynucleotides
of the invention include, but are not limited to amlodipine,
bepridil, diltiazem, felodipine, flunarizine, isradipine,
nicardipine, nifedipine, nimodipine, and verapamil.
[0341] In certain embodiments, the albumin fusion proteins and/or
polynucleotides of the invention are administered in combination
with treatments for gastrointestinal disorders. Treatments for
gastrointestinal disorders that may be administered with the
albumin fusion protein and/or polynucleotide of the invention
include, but are not limited to, H.sub.2 histamine receptor
antagonists (e.g., TAGAMET.TM. (cimetidine), ZANTAC.TM.
(ranitidine), PEPCID.TM. (famotidine), and AXID.TM. (nizatidine));
inhibitors of H.sup.+, K.sup.+, ATPase (e.g., PREVACID.TM.
(lansoprazole) and PRILOSEC.TM. (omeprazole)); Bismuth compounds
(e.g., PEPTO-BISMOL.TM. (bismuth subsalicylate) and DE-NOL.TM.
(bismuth subcitrate)); various antacids; sucralfate; prostaglandin
analogs (e.g. CYTOTEC.TM. (misoprostol)); muscarinic cholinergic
antagonists; laxatives (e.g., surfactant laxatives, stimulant
laxatives, saline and osmotic laxatives); antidiarrheal agents
(e.g., LOMOTIL.TM. (diphenoxylate), MOTOFEN.TM. (diphenoxin), and
IMODIUM.TM. (loperamide hydrochloride)), synthetic analogs of
somatostatin such as SANDOSTATIN.TM. (octreotide), antiemetic
agents (e.g., ZOFRAN.TM. (ondansetron), KYTRIL.TM. (granisetron
hydrochloride), tropisetron, dolasetron, metoclopramide,
chlorpromazine, perphenazine, prochlorperazine, promethazine,
thiethylperazine, triflupromazine, domperidone, haloperidol,
droperidol, trimethobenzamide, dexamethasone, methylprednisolone,
dronabinol, and nabilone); D2 antagonists (e.g., metoclopramide,
trimethobenzamide and chlorpromazine); bile salts; chenodeoxycholic
acid; ursodeoxycholic acid; and pancreatic enzyme preparations such
as pancreatin and pancrelipase.
[0342] In additional embodiments, the albumin fusion proteins
and/or polynucleotides of the invention are administered in
combination with other therapeutic or prophylactic regimens, such
as, for example, radiation therapy.
[0343] The invention also provides a pharmaceutical pack or kit
comprising one or more containers filled with one or more of the
ingredients of the pharmaceutical compositions comprising albumin
fusion proteins of the invention. Optionally associated with such
container(s) can be a notice in the form prescribed by a
governmental agency regulating the manufacture, use or sale of
pharmaceuticals or biological products, which notice reflects
approval by the agency of manufacture, use or sale for human
administration.
Gene Therapy
[0344] Constructs encoding albumin fusion proteins of the invention
can be used as a part of a gene therapy protocol to deliver
therapeutically effective doses of the albumin fusion protein. A
preferred approach for in vivo introduction of nucleic acid into a
cell is by use of a viral vector containing nucleic acid, encoding
an albumin fusion protein of the invention. Infection of cells with
a viral vector has the advantage that a large proportion of the
targeted cells can receive the nucleic acid. Additionally,
molecules encoded within the viral vector, e.g., by a cDNA
contained in the viral vector, are expressed efficiently in cells
which have taken up viral vector nucleic acid.
[0345] Retrovirus vectors and adeno-associated virus vectors can be
used as a recombinant gene delivery system for the transfer of
exogenous nucleic acid molecules encoding albumin fusion proteins
in vivo. These vectors provide efficient delivery of nucleic acids
into cells, and the transferred nucleic acids are stably integrated
into the chromosomal DNA of the host. The development of
specialized cell lines (termed "packaging cells") which produce
only replication-defective retroviruses has increased the utility
of retroviruses for gene therapy, and defective retroviruses are
characterized for use in gene transfer for gene therapy purposes
(for a review see Miller, A. D. (1990) Blood 76:27 1). A
replication defective retrovirus can be packaged into virions which
can be used to infect a target cell through the use of a helper
virus by standard techniques. Protocols for producing recombinant
retroviruses and for infecting cells in vitro or in vivo with such
viruses can be found in Current Protocols in Molecular Biology,
Ausubel, F.M. et al., (eds.) Greene Publishing Associates, (1989),
Sections 9.10-9.14 and other standard laboratory manuals.
[0346] Another viral gene delivery system useful in the present
invention uses adenovirus-derived vectors. The genome of an
adenovirus can be manipulated such that it encodes and expresses a
gene product of interest but is inactivated in terms of its ability
to replicate in a normal lytic viral life cycle. See, for example,
Berkner et al., BioTechniques 6:616 (1988); Rosenfeld et al.,
Science 252:431-434 (1991); and Rosenfeld et al., Cell 68:143-155
(1992). Suitable adenoviral vectors derived from the adenovirus
strain Ad type 5 d1324 or other strains of adenovirus (e.g., Ad2,
Ad3, Ad7 etc.) are known to those skilled in the art. Recombinant
adenoviruses can be advantageous in certain circumstances in that
they are not capable of infecting nondividing cells and can be used
to infect a wide variety of cell types, including epithelial cells
(Rosenfeld et al., (1992) cited supra). Furthermore, the virus
particle is relatively stable and amenable to purification and
concentration, and as above, can be modified so as to affect the
spectrum of infectivity. Additionally, introduced adenoviral DNA
(and foreign DNA contained therein) is not integrated into the
genome of a host cell but remains episomal, thereby avoiding
potential problems that can occur as a result of insertional
mutagenesis in situations where introduced DNA becomes integrated
into the host genome (e.g., retroviral DNA). Moreover, the carrying
capacity of the adenoviral genome for foreign DNA is large (up to 8
kilobases) relative to other gene delivery vectors (Berkner et al.,
cited supra; Haj-Ahmand et al., J. Virol. 57:267 (1986)).
[0347] In another embodiment, non-viral gene delivery systems of
the present invention rely on endocytic pathways for the uptake of
the subject nucleotide molecule by the targeted cell. Exemplary
gene delivery systems of this type include liposomal derived
systems, poly-lysine conjugates, and artificial viral envelopes. In
a representative embodiment, a nucleic acid molecule encoding an
albumin fusion protein of the invention can be entrapped in
liposomes bearing positive charges on their surface (e.g.,
lipofectins) and (optionally) which are tagged with antibodies
against cell surface antigens of the target tissue (Mizuno et al.
(1992) No Shinkei Geka 20:547-5 5 1; PCT publication W091/06309;
Japanese patent application 1047381; and European patent
publication EP-A-43075). Gene delivery systems for a gene encoding
an albumin fusion protein of the invention can be introduced into a
patient by any of a number of methods. For instance, a
pharmaceutical preparation of the gene delivery system can be
introduced systemically, e.g. by intravenous injection, and
specific transduction of the protein in the target cells occurs
predominantly from specificity of transfection provided by the gene
delivery vehicle, cell-type or tissue-type expression due to the
transcriptional regulatory sequences controlling expression of the
receptor gene, or a combination thereof. In other embodiments,
initial delivery of the recombinant gene is more limited with
introduction into the animal being quite localized. For example,
the gene delivery vehicle can be introduced by catheter (see U.S.
Pat. No. 5,328,470) or by Stereotactic injection (e.g. Chen et al.
(1994) PNAS 91: 3 054-3 05 7). The pharmaceutical preparation of
the gene therapy construct can consist essentially of the gene
delivery system in an acceptable diluent, or can comprise a slow
release matrix in which the gene delivery vehicle is imbedded.
Where the albumin fusion protein can be produced intact from
recombinant cells, e.g. retroviral vectors, the pharmaceutical
preparation can comprise one or more cells which produce the
albumin fusion protein.
Additional Gene Therapy Methods
[0348] Also encompassed by the invention are gene therapy methods
for treating or preventing disorders, diseases and conditions. The
gene therapy methods relate to the introduction of nucleic acid
(DNA, RNA and antisense DNA or RNA) sequences into an animal to
achieve expression of an albumin fusion protein of the invention.
This method requires a polynucleotide which codes for an albumin
fusion protein of the present invention operatively linked to a
promoter and any other genetic elements necessary for the
expression of the fusion protein by the target tissue. Such gene
therapy and delivery techniques are known in the art, see, for
example, WO90/11092, which is herein incorporated by reference.
[0349] Thus, for example, cells from a patient may be engineered
with a polynucleotide (DNA or RNA) comprising a promoter operably
linked to a polynucleotide encoding an albumin fusion protein of
the present invention ex vivo, with the engineered cells then being
provided to a patient to be treated with the fusion protein of the
present invention. Such methods are well-known in the art. For
example, see Belldegrun, A., et al., J. Natl. Cancer Inst. 85:
207-216 (1993); Ferrantini, M. et al., Cancer Research 53:
1107-1112 (1993); Ferrantini, M. et al., J. Immunology 153:
4604-4615 (1994); Kaido, T., et al., Int. J. Cancer 60: 221-229
(1995); Ogura, H., et al., Cancer Research 50: 5102-5106 (1990);
Santodonato, L., et al., Human Gene Therapy 7:1-10 (1996);
Santodonato, L., et al., Gene Therapy 4:1246-1255 (1997); and
Zhang, J.-F. et al., Cancer Gene Therapy 3: 31-38 (1996)), which
are herein incorporated by reference. In one embodiment, the cells
which are engineered are arterial cells. The arterial cells may be
reintroduced into the patient through direct injection to the
artery, the tissues surrounding the artery, or through catheter
injection.
[0350] As discussed in more detail below, the polynucleotide
constructs can be delivered by any method that delivers injectable
materials to the cells of an animal, such as, injection into the
interstitial space of tissues (heart, muscle, skin, lung, liver,
and the like). The polynucleotide constructs may be delivered in a
pharmaceutically acceptable liquid or aqueous carrier.
[0351] In one embodiment, polynucleotides encoding the albumin
fusion proteins of the present invention is delivered as a naked
polynucleotide. The term "naked" polynucleotide, DNA or RNA refers
to sequences that are free from any delivery vehicle that acts to
assist, promote or facilitate entry into the cell, including viral
sequences, viral particles, liposome formulations, lipofectin or
precipitating agents and the like. However, polynucleotides
encoding the albumin fusion proteins of the present invention can
also be delivered in liposome formulations and lipofectin
formulations and the like can be prepared by methods well known to
those skilled in the art. Such methods are described, for example,
in U.S. Pat. Nos. 5,593,972, 5,589,466, and 5,580,859, which are
herein incorporated by reference.
[0352] The polynucleotide vector constructs used in the gene
therapy method are preferably constructs that will not integrate
into the host genome nor will they contain sequences that allow for
replication. Appropriate vectors include pWLNEO, pSV2CAT, pOG44,
pXT1 and pSG available from Stratagene; pSVK3, pBPV, pMSG and pSVL
available from Pharmacia; and pEF1/V5, pcDNA3.1, and pRc/CMV2
available from Invitrogen. Other suitable vectors will be readily
apparent to the skilled artisan.
[0353] Any strong promoter known to those skilled in the art can be
used for driving the expression of the polynucleotide sequence.
Suitable promoters include adenoviral promoters, such as the
adenoviral major late promoter; or heterologous promoters, such as
the cytomegalovirus (CMV) promoter; the respiratory syncytial virus
(RSV) promoter; inducible promoters, such as the MMT promoter, the
metallothionein promoter; heat shock promoters; the albumin
promoter; the ApoAI promoter; human globin promoters; viral
thymidine kinase promoters, such as the Herpes Simplex thymidine
kinase promoter; retroviral LTRs; the b-actin promoter; and human
growth hormone promoters. The promoter also may be the native
promoter for the gene corresponding to the Therapeutic protein
portion of the albumin fusion proteins of the invention.
[0354] Unlike other gene therapy techniques, one major advantage of
introducing naked nucleic acid sequences into target cells is the
transitory nature of the polynucleotide synthesis in the cells.
Studies have shown that non-replicating DNA sequences can be
introduced into cells to provide production of the desired
polypeptide for periods of up to six months.
[0355] The polynucleotide construct can be delivered to the
interstitial space of tissues within the an animal, including of
muscle, skin, brain, lung, liver, spleen, bone marrow, thymus,
heart, lymph, blood, bone, cartilage, pancreas, kidney, gall
bladder, stomach, intestine, testis, ovary, uterus, rectum, nervous
system, eye, gland, and connective tissue. Interstitial space of
the tissues comprises the intercellular, fluid, mucopolysaccharide
matrix among the reticular fibers of organ tissues, elastic fibers
in the walls of vessels or chambers, collagen fibers of fibrous
tissues, or that same matrix within connective tissue ensheathing
muscle cells or in the lacunae of bone. It is similarly the space
occupied by the plasma of the circulation and the lymph fluid of
the lymphatic channels. Delivery to the interstitial space of
muscle tissue is preferred for the reasons discussed below. They
may be conveniently delivered by injection into the tissues
comprising these cells. They are preferably delivered to and
expressed in persistent, non-dividing cells which are
differentiated, although delivery and expression may be achieved in
non-differentiated or less completely differentiated cells, such
as, for example, stem cells of blood or skin fibroblasts. In vivo
muscle cells are particularly competent in their ability to take up
and express polynucleotides.
[0356] For the naked nucleic acid sequence injection, an effective
dosage amount of DNA or RNA will be in the range of from about 0.05
mg/kg body weight to about 50 mg/kg body weight. Preferably the
dosage will be from about 0.005 mg/kg to about 20 mg/kg and more
preferably from about 0.05 mg/kg to about 5 mg/kg. Of course, as
the artisan of ordinary skill will appreciate, this dosage will
vary according to the tissue site of injection. The appropriate and
effective dosage of nucleic acid sequence can readily be determined
by those of ordinary skill in the art and may depend on the
condition being treated and the route of administration.
[0357] The preferred route of administration is by the parenteral
route of injection into the interstitial space of tissues. However,
other parenteral routes may also be used, such as, inhalation of an
aerosol formulation particularly for delivery to lungs or bronchial
tissues, throat or mucous membranes of the nose. In addition, naked
DNA constructs can be delivered to arteries during angioplasty by
the catheter used in the procedure.
[0358] The naked polynucleotides are delivered by any method known
in the art, including, but not limited to, direct needle injection
at the delivery site, intravenous injection, topical
administration, catheter infusion, and so-called "gene guns". These
delivery methods are known in the art.
[0359] The constructs may also be delivered with delivery vehicles
such as viral sequences, viral particles, liposome formulations,
lipofectin, precipitating agents, etc. Such methods of delivery are
known in the art.
[0360] In certain embodiments, the polynucleotide constructs are
complexed in a liposome preparation. Liposomal preparations for use
in the instant invention include cationic (positively charged),
anionic (negatively charged) and neutral preparations. However,
cationic liposomes are particularly preferred because a tight
charge complex can be formed between the cationic liposome and the
polyanionic nucleic acid. Cationic liposomes have been shown to
mediate intracellular delivery of plasmid DNA (Feigner et al.,
Proc. Natl. Acad. Sci. USA (1987) 84:7413-7416, which is herein
incorporated by reference); mRNA (Malone et al., Proc. Natl. Acad.
Sci. USA (1989) 86:6077-6081, which is herein incorporated by
reference); and purified transcription factors (Debs et al., J.
Biol. Chem. (1990) 265:10189-10192, which is herein incorporated by
reference), in functional form.
[0361] Cationic liposomes are readily available. For example,
N[1-2,3-dioleyloxy)propyl]-N,N,N-triethylammonium (DOTMA) liposomes
are particularly useful and are available under the trademark
Lipofectin, from GIBCO BRL, Grand Island, N.Y. (See, also, Feigner
et al., Proc. Natl Acad. Sci. USA (1987) 84:7413-7416, which is
herein incorporated by reference). Other commercially available
liposomes include transfectace (DDAB/DOPE) and DOTAP/DOPE
(Boehringer).
[0362] Other cationic liposomes can be prepared from readily
available materials using techniques well known in the art. See,
e.g. PCT Publication No. WO 90/11092 (which is herein incorporated
by reference) for a description of the synthesis of DOTAP
(1,2-bis)oleoyloxy)-3-(trimethylammonio)propane) liposomes.
Preparation of DOTMA liposomes is explained in the literature, see,
e.g., P. Feigner et al., Proc. Natl. Acad. Sci. USA 84:7413-7417,
which is herein incorporated by reference. Similar methods can be
used to prepare liposomes from other cationic lipid materials.
[0363] Similarly, anionic and neutral liposomes are readily
available, such as from Avanti Polar Lipids (Birmingham, Ala.), or
can be easily prepared using readily available materials. Such
materials include phosphatidyl, choline, cholesterol, phosphatidyl
ethanolarnine, dioleoylphosphatidyl choline (DOPC),
dioleoylphosphatidyl glycerol (DOPG), dioleoylphoshatidyl
ethanolamine (DOPE), among others. These materials can also be
mixed with the DOTMA and DOTAP starting materials in appropriate
ratios. Methods for making liposomes using these materials are well
known in the art.
[0364] For example, commercially dioleoylphosphatidyl choline
(DOPC), dioleoylphosphatidyl glycerol (DOPG), and
dioleoylphosphatidyl ethanolamine (DOPE) can be used in various
combinations to make conventional liposomes, with or without the
addition of cholesterol. Thus, for example, DOPG/DOPC vesicles can
be prepared by drying 50 mg each of DOPG and DOPC under a stream of
nitrogen gas into a sonication vial. The sample is placed under a
vacuum pump overnight and is hydrated the following day with
deionized water. The sample is then sonicated for 2 hours in a
capped vial, using a Heat Systems model 350 sonicator equipped with
an inverted cup (bath type) probe at the maximum setting while the
bath is circulated at 15EC. Alternatively, negatively charged
vesicles can be prepared without sonication to produce
multilamellar vesicles or by extrusion through nucleopore membranes
to produce unilamellar vesicles of discrete size. Other methods are
known and available to those of skill in the art.
[0365] The liposomes can comprise multilamellar vesicles (MLVs),
small unilamellar vesicles (SUVs), or large unilamellar vesicles
(LUVs), with SUVs being preferred. The various liposome-nucleic
acid complexes are prepared using methods well known in the art.
See, e.g., Straubinger et al., Methods of Immunology (1983),
101:512-527, which is herein incorporated by reference. For
example, MLVs containing nucleic acid can be prepared by depositing
a thin film of phospholipid on the walls of a glass tube and
subsequently hydrating with a solution of the material to be
encapsulated. SUVs are prepared by extended sonication of MLVs to
produce a homogeneous population of unilamellar liposomes. The
material to be entrapped is added to a suspension of preformed MLVs
and then sonicated. When using liposomes containing cationic
lipids, the dried lipid film is resuspended in an appropriate
solution such as sterile water or an isotonic buffer solution such
as 10 mM Tris/NaCl, sonicated, and then the preformed liposomes are
mixed directly with the DNA. The liposome and DNA form a very
stable complex due to binding of the positively charged liposomes
to the cationic DNA. SUVs find use with small nucleic acid
fragments. LUVs are prepared by a number of methods, well known in
the art. Commonly used methods include Ca.sup.2+-EDTA chelation
(Papahadjopoulos et al., Biochim. Biophys. Acta (1975) 394:483;
Wilson et al., Cell 17:77 (1979)); ether injection (Deamer, D. and
Bangham, A., Biochim. Biophys. Acta 443:629 (1976); Ostro et al.,
Biochem. Biophys. Res. Commun. 76:836 (1977); Fraley et al., Proc.
Natl. Acad. Sci. USA 76:3348 (1979)); detergent dialysis (Enoch, H.
and Strittmatter, P., Proc. Natl. Acad. Sci. USA 76:145 (1979));
and reverse-phase evaporation (REV) (Fraley et al., J. Biol. Chem.
255:10431 (1980); Szoka, F. and Papahadjopoulos, D., Proc. Natl.
Acad. Sci. USA 75:145 (1978); Schaefer-Ridder et al., Science
215:166 (1982)), which are herein incorporated by reference.
[0366] Generally, the ratio of DNA to liposomes will be from about
10:1 to about 1:10. Preferably, the ration will be from about 5:1
to about 1:5. More preferably, the ration will be about 3:1 to
about 1:3. Still more preferably, the ratio will be about 1:1.
[0367] U.S. Pat. No. 5,676,954 (which is herein incorporated by
reference) reports on the injection of genetic material, complexed
with cationic liposomes carriers, into mice. U.S. Pat. Nos.
4,897,355, 4,946,787, 5,049,386, 5,459,127, 5,589,466, 5,693,622,
5,580,859, 5,703,055, and international publication no. WO 94/9469
(which are herein incorporated by reference) provide cationic
lipids for use in transfecting DNA into cells and mammals. U.S.
Pat. Nos. 5,589,466, 5,693,622, 5,580,859, 5,703,055, and
international publication no. WO 94/9469 provide methods for
delivering DNA-cationic lipid complexes to mammals.
[0368] In certain embodiments, cells are engineered, ex vivo or in
vivo, using a retroviral particle containing RNA which comprises a
sequence encoding an albumin fusion protein of the present
invention. Retroviruses from which the retroviral plasmid vectors
may be derived include, but are not limited to, Moloney Murine
Leukemia Virus, spleen necrosis virus, Rous sarcoma Virus, Harvey
Sarcoma Virus, avian leukosis virus, gibbon ape leukemia virus,
human immunodeficiency virus, Myeloproliferative Sarcoma Virus, and
mammary tumor virus.
[0369] The retroviral plasmid vector is employed to transduce
packaging cell lines to form producer cell lines. Examples of
packaging cells which may be transfected include, but are not
limited to, the PE501, PA317, R-2, R-AM, PA12, T19-14X,
VT-19-17-H2, RCRE, RCRIP, GP+E-86, GP+envAm12, and DAN cell lines
as described in Miller, Human Gene Therapy 1:5-14 (1990), which is
incorporated herein by reference in its entirety. The vector may
transduce the packaging cells through any means known in the art.
Such means include, but are not limited to, electroporation, the
use of liposomes, and CaPO.sub.4 precipitation. In one alternative,
the retroviral plasmid vector may be encapsulated into a liposome,
or coupled to a lipid, and then administered to a host.
[0370] The producer cell line generates infectious retroviral
vector particles which include polynucleotide encoding an albumin
fusion protein of the present invention. Such retroviral vector
particles then may be employed, to transduce eukaryotic cells,
either in vitro or in vivo. The transduced eukaryotic cells will
express a fusion protin of the present invention.
[0371] In certain other embodiments, cells are engineered, ex vivo
or in vivo, with polynucleotide contained in an adenovirus vector.
Adenovirus can be manipulated such that it encodes and expresses
fusion protein of the present invention, and at the same time is
inactivated in terms of its ability to replicate in a normal lytic
viral life cycle. Adenovirus expression is achieved without
integration of the viral DNA into the host cell chromosome, thereby
alleviating concerns about insertional mutagenesis. Furthermore,
adenoviruses have been used as live enteric vaccines for many years
with an excellent safety profile (Schwartz et al. Am. Rev. Respir.
Dis.109:233-238 (1974)). Finally, adenovirus mediated gene transfer
has been demonstrated in a number of instances including transfer
of alpha-1-antitrypsin and CFTR to the lungs of cotton rats
(Rosenfeld, M. A. et al. (1991) Science 252:431-434; Rosenfeld et
al., (1992) Cell 68:143-155). Furthermore, extensive studies to
attempt to establish adenovirus as a causative agent in human
cancer were uniformly negative (Green, M. et al. (1979) Proc. Natl.
Acad. Sci. USA 76:6606).
[0372] Suitable adenoviral vectors useful in the present invention
are described, for example, in Kozarsky and Wilson, Curr. Opin.
Genet. Devel. 3:499-503 (1993); Rosenfeld et al., Cell 68:143-155
(1992); Engelhardt et al., Human Genet. Ther. 4:759-769 (1993);
Yang et al., Nature Genet. 7:362-369 (1994); Wilson et al., Nature
365:691-692 (1993); and U.S. Pat. No. 5,652,224, which are herein
incorporated by reference. For example, the adenovirus vector Ad2
is useful and can be grown in human 293 cells. These cells contain
the E1 region of adenovirus and constitutively express E1a and E1b,
which complement the defective adenoviruses by providing the
products of the genes deleted from the vector. In addition to Ad2,
other varieties of adenovirus (e.g., Ad3, Ad5, and Ad7) are also
useful in the present invention.
[0373] Preferably, the adenoviruses used in the present invention
are replication deficient. Replication deficient adenoviruses
require the aid of a helper virus and/or packaging cell line to
form infectious particles. The resulting virus is capable of
infecting cells and can express a polynucleotide of interest which
is operably linked to a promoter, but cannot replicate in most
cells. Replication deficient adenoviruses may be deleted in one or
more of all or a portion of the following genes: E1a, E1b, E3, E4,
E2a, or L1 through L5.
[0374] In certain other embodiments, the cells are engineered, ex
vivo or in vivo, using an adeno-associated virus (AAV). AAVs are
naturally occurring defective viruses that require helper viruses
to produce infectious particles (Muzyczka, N., Curr. Topics in
Microbiol. Immunol. 158:97 (1992)). It is also one of the few
viruses that may integrate its DNA into non-dividing cells. Vectors
containing as little as 300 base pairs of AAV can be packaged and
can integrate, but space for exogenous DNA is limited to about 4.5
kb. Methods for producing and using such AAVs are known in the art.
See, for example, U.S. Pat. Nos. 5,139,941, 5,173,414, 5,354,678,
5,436,146, 5,474,935, 5,478,745, and 5,589,377.
[0375] For example, an appropriate AAV vector for use in the
present invention will include all the sequences necessary for DNA
replication, encapsidation, and host-cell integration. The
polynucleotide construct is inserted into the AAV vector using
standard cloning methods, such as those found in Sambrook et al.,
Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Press
(1989). The recombinant AAV vector is then transfected into
packaging cells which are infected with a helper virus, using any
standard technique, including lipofection, electroporation, calcium
phosphate precipitation, etc. Appropriate helper viruses include
adenoviruses, cytomegaloviruses, vaccinia viruses, or herpes
viruses. Once the packaging cells are transfected and infected,
they will produce infectious AAV viral particles which contain the
polynucleotide construct. These viral particles are then used to
transduce eukaryotic cells, either ex vivo or in vivo. The
transduced cells will contain the polynucleotide construct
integrated into its genome, and will express a fusion protein of
the invention.
[0376] Another method of gene therapy involves operably associating
heterologous control regions and endogenous polynucleotide
sequences (e.g. encoding a polypeptide of the present invention)
via homologous recombination (see, e.g., U.S. Pat. No. 5,641,670,
issued Jun. 24, 1997; International Publication No. WO 96/29411,
published Sep. 26, 1996; International Publication No. WO 94/12650,
published Aug. 4, 1994; Koller et al., Proc. Natl. Acad. Sci. USA
86:8932-8935 (1989); and Zijlstra et al., Nature 342:435-438
(1989), which are herein encorporated by reference. This method
involves the activation of a gene which is present in the target
cells, but which is not normally expressed in the cells, or is
expressed at a lower level than desired.
[0377] Polynucleotide constructs are made, using standard
techniques known in the art, which contain the promoter with
targeting sequences flanking the promoter. Suitable promoters are
described herein. The targeting sequence is sufficiently
complementary to an endogenous sequence to permit homologous
recombination of the promoter-targeting sequence with the
endogenous sequence. The targeting sequence will be sufficiently
near the 5' end of the desired endogenous polynucleotide sequence
so the promoter will be operably linked to the endogenous sequence
upon homologous recombination.
[0378] The promoter and the targeting sequences can be amplified
using PCR. Preferably, the amplified promoter contains distinct
restriction enzyme sites on the 5' and 3' ends. Preferably, the 3'
end of the first targeting sequence contains the same restriction
enzyme site as the 5' end of the amplified promoter and the 5' end
of the second targeting sequence contains the same restriction site
as the 3' end of the amplified promoter. The amplified promoter and
targeting sequences are digested and ligated together.
[0379] The promoter-targeting sequence construct is delivered to
the cells, either as naked polynucleotide, or in conjunction with
transfection-facilitating agents, such as liposomes, viral
sequences, viral particles, whole viruses, lipofection,
precipitating agents, etc., described in more detail above. The P
promoter-targeting sequence can be delivered by any method,
included direct needle injection, intravenous injection, topical
administration, catheter infusion, particle accelerators, etc. The
methods are described in more detail below.
[0380] The promoter-targeting sequence construct is taken up by
cells. Homologous recombination between the construct and the
endogenous sequence takes place, such that an endogenous sequence
is placed under the control of the promoter. The promoter then
drives the expression of the endogenous sequence.
[0381] The polynucleotide encoding an albumin fusion protein of the
present invention may contain a secretory signal sequence that
facilitates secretion of the protein. Typically, the signal
sequence is positioned in the coding region of the polynucleotide
to be expressed towards or at the 5' end of the coding region. The
signal sequence may be homologous or heterologous to the
polynucleotide of interest and may be homologous or heterologous to
the cells to be transfected. Additionally, the signal sequence may
be chemically synthesized using methods known in the art.
[0382] Any mode of administration of any of the above-described
polynucleotides constructs can be used so long as the mode results
in the expression of one or more molecules in an amount sufficient
to provide a therapeutic effect. This includes direct needle
injection, systemic injection, catheter infusion, biolistic
injectors, particle accelerators (i.e., "gene guns"), gelfoam
sponge depots, other commercially available depot materials,
osmotic pumps (e.g., Alza minipumps), oral or suppositorial solid
(tablet or pill) pharmaceutical formulations, and decanting or
topical applications during surgery. For example, direct injection
of naked calcium phosphate-precipitated plasmid into rat liver and
rat spleen or a protein-coated plasmid into the portal vein has
resulted in gene expression of the foreign gene in the rat livers
(Kaneda et al., Science 243:375 (1989)).
[0383] A preferred method of local administration is by direct
injection. Preferably, an albumin fusion protein of the present
invention complexed with a delivery vehicle is administered by
direct injection into or locally within the area of arteries.
Administration of a composition locally within the area of arteries
refers to injecting the composition centimeters and preferably,
millimeters within arteries.
[0384] Another method of local administration is to contact a
polynucleotide construct of the present invention in or around a
surgical wound. For example, a patient can undergo surgery and the
polynucleotide construct can be coated on the surface of tissue
inside the wound or the construct can be injected into areas of
tissue inside the wound.
[0385] Therapeutic compositions useful in systemic administration,
include fusion proteins of the present invention complexed to a
targeted delivery vehicle of the present invention. Suitable
delivery vehicles for use with systemic administration comprise
liposomes comprising ligands for targeting the vehicle to a
particular site. In specific embodiments, suitable delivery
vehicles for use with systemic administration comprise liposomes
comprising albumin fusion proteins of the invention for targeting
the vehicle to a particular site.
[0386] Preferred methods of systemic administration, include
intravenous injection, aerosol, oral and percutaneous (topical)
delivery. Intravenous injections can be performed using methods
standard in the art. Aerosol delivery can also be performed using
methods standard in the art (see, for example, Stribling et al.,
Proc. Natl. Acad. Sci. USA 189:11277-11281, 1992, which is
incorporated herein by reference). Oral delivery can be performed
by complexing a polynucleotide construct of the present invention
to a carrier capable of withstanding degradation by digestive
enzymes in the gut of an animal. Examples of such carriers, include
plastic capsules or tablets, such as those known in the art.
Topical delivery can be performed by mixing a polynucleotide
construct of the present invention with a lipophilic reagent (e.g.,
DMSO) that is capable of passing into the skin.
[0387] Determining an effective amount of substance to be delivered
can depend upon a number of factors including, for example, the
chemical structure and biological activity of the substance, the
age and weight of the animal, the precise condition requiring
treatment and its severity, and the route of administration. The
frequency of treatments depends upon a number of factors, such as
the amount of polynucleotide constructs administered per dose, as
well as the health and history of the subject. The precise amount,
number of doses, and timing of doses will be determined by the
attending physician or veterinarian.
[0388] Albumin fusion proteins of the present invention can be
administered to any animal, preferably to mammals and birds.
Preferred mammals include humans, dogs, cats, mice, rats, rabbits
sheep, cattle, horses and pigs, with humans being particularly
preferred.
Biological Activities
[0389] Albumin fusion proteins and/or polynucleotides encoding
albumin fusion proteins of the present invention, can be used in
assays to test for one or more biological activities. If an albumin
fusion protein and/or polynucleotide exhibits an activity in a
particular assay, it is likely that the Therapeutic protein
corresponding to the fusion protein may be involved in the diseases
associated with the biological activity. Thus, the fusion protein
could be used to treat the associated disease.
[0390] Members of the secreted family of proteins are believed to
be involved in biological activities associated with, for example,
cellular signaling. Accordingly, albumin fusion proteins of the
invention and polynucleotides encoding these proteins, may be used
in diagnosis, prognosis, prevention and/or treatment of diseases
and/or disorders associated with aberrant activity of secreted
polypeptides.
[0391] In a preferred embodiment, albumin fusion proteins of the
invention comprising Therapeutic protein portions corresponding to
IL-2 and/or INF-beta polypeptides, or fragments or variants
thereof, are useful in the treatment, prevention, diagnosis, and/or
detection of diseases, disorders and/or conditions of the immune
system. For example, albumin fusion proteins of the invention
comprising Therapeutic protein portions corresponding to IL-2 or
fragments or variants thereof are useful in the treatment,
prevention, diagnosis, and/or detection of diseases, disorders
and/or conditions including, but not limited to, Metastatic renal
cell carcinoma and metastatic melanoma; Malignant Melanoma; Renal
cell carcinoma; HIV infections; Inflammatory bowel disorders;
Kaposi's sarcoma; Leukaemia; Multiple sclerosis; Rheumatoid
arthritis; Transplant rejection; Type 1 diabetes mellitus; Lung
Cancer; Acute myeloid leukaemia; Hepatitis C; Non-Hodgkin's
lymphoma; Ovarian cancer; and/or as described in the "Immune
Activity," "Infectious Disease" and/or "Hyperproliferative
Disorders" sections below. Further, albumin fusion proteins of the
invention comprising Therapeutic protein portions corresponding to
INF-beta or fragments or variants thereof are useful in the
treatment, prevention, diagnosis, and/or detection of diseases,
disorders and/or conditions including, but not limited to,
melanomas; solid tumors; Multiple sclerosis; bacterial infections;
chemoprotection; thrombocytopenia; HIV infections; prostate cancer;
cancer; hematological malignancies; hematological disorders;
preleukemia; glioma; hepatitis B; hepatitis C; human
papillomavirus; pulmonary fibrosis; Age-related macular
degeneration; Brain cancer; Glioblastoma multiforme; Liver cancer;
Malignant melanoma; Colorectal cancer; Crohn's disease; Non-small
cell lung cancer; Rheumatoid arthritis; Ulcerative colitis and/or
as described in the "Immune Activity," "Infectious Disease" and/or
"Hyperproliferative Disorders" sections below.
[0392] In a preferred embodiment, albumin fusion proteins of the
invention comprising Therapeutic protein portions corresponding to
Growth hormone releasing factor polypeptides, or fragments or
variants thereof, are useful in the treatment, prevention,
diagnosis, and/or detection of diseases, disorders and/or
conditions of growth hormone deficiency. In an additional preferred
embodiment, albumin fusion proteins of the invention comprising
Therapeutic protein portions corresponding to growth hormone
releasing factor or fragments or variants thereof are useful in the
treatment, prevention, diagnosis, and/or detection of diseases,
disorders and/or conditions including, but not limited to,
Cachexia; Diagnostic Agents; Female Infertility; Growth hormone
deficiency; Muscle Wasting; Short Stature; Postmenopausal
Osteoporosis; Idiopathic growth hormone deficiency and/or as
described in the "Endocrine Disorders," and/or "Reproductive System
Disorders" sections below.
[0393] In a preferred embodiment, albumin fusion proteins of the
invention comprising Therapeutic protein portions corresponding to
calcitonin and/or parathyroid hormone polypeptides, or fragments or
variants thereof, are useful in the treatment, prevention,
diagnosis, and/or detection of diseases, disorders and/or
conditions relating to bone. In an additional preferred embodiment,
albumin fusion proteins of the invention comprising Therapeutic
protein portions corresponding to calcitonin or fragments or
variants thereof are useful in the treatment, prevention,
diagnosis, and/or detection of diseases, disorders and/or
conditions including, but not limited to, bone disorders, Paget's
disease and/or as described in the "Endocrine Disorders," and/or
"Reproductive System Disorders" sections below. In an additional
preferred embodiment, albumin fusion proteins of the invention
comprising Therapeutic protein portions corresponding to
parathyroid hormone or fragments or variants thereof are useful in
the treatment, prevention, diagnosis, and/or detection of diseases,
disorders and/or conditions including, but not limited to,
Osteoporosis and/or as described in the "Endocrine Disorders,"
and/or "Reproductive System Disorders" sections below.
[0394] In preferred embodiments, the present invention encompasses
a method of treating a disease or disorder listed in the "Preferred
Indication Y" column of Table 1 comprising administering to a
patient in which such treatment, prevention or amelioration is
desired an albumin fusion protein of the invention that comprises a
Therapeutic protein portion corresponding to a Therapeutic protein
disclosed in the "Therapeutic Protein X" column of Table 1 (in the
same row as the disease or disorder to be treated is listed in the
"Preferred Indication Y" column of Table 1) in an amount effective
to treat, prevent, diagnose, or ameliorate the disease or
disorder.
[0395] In alternative embodiments, fusion proteins of the present
invention may be used in the diagnosis, prognosis, prevention
and/or treatment of diseases and/or disorders relating to diseases
and disorders of the endocrine system (see, for example, "Endocrine
Disorders" section below), the nervous system (see, for example,
"Neurological Disorders" section below), the immune system (see,
for example, "Immune Activity" section below), respiratory system
(see, for example, "Respiratory Disorders" section below),
cardiovascular system (see, for example, "Cardiovascular Disorders"
section below), reproductive system (see, for example,
"Reproductive System Disorders" section below) digestive system
(see, for example, "Gastrointestinal Disorders" section below),
diseases and/or disorders relating to cell proliferation (see, for
example, "Hyperproliferative Disorders" section below), and/or
diseases or disorders relating to the blood (see, for example,
"Blood-Related Disorders" section below).
[0396] In certain embodiments, an albumin fusion protein of the
present invention may be used to diagnose and/or prognose diseases
and/or disorders associated with the tissue(s) in which the gene
corresponding to the Therapeutic protein portion of the fusion
protein of the invention is expressed.
[0397] Thus, fusion proteins of the invention and polynucleotides
encoding albumin fusion proteins of the invention are useful in the
diagnosis, detection and/or treatment of diseases and/or disorders
associated with activities that include, but are not limited to,
prohormone activation, neurotransmitter activity, cellular
signaling, cellular proliferation, cellular differentiation, and
cell migration.
[0398] More generally, fusion proteins of the invention and
polynucleotides encoding albumin fusion proteins of the invention
may be useful for the diagnosis, prognosis, prevention and/or
treatment of diseases and/or disorders associated with the
following systems.
Immune Activity
[0399] Albumin fusion proteins of the invention and polynucleotides
encoding albumin fusion proteins of the invention may be useful in
treating, preventing, diagnosing and/or prognosing diseases,
disorders, and/or conditions of the immune system, by, for example,
activating or inhibiting the proliferation, differentiation, or
mobilization (chemotaxis) of immune cells. Immune cells develop
through a process called hematopoiesis, producing myeloid
(platelets, red blood cells, neutrophils, and macrophages) and
lymphoid (B and T lymphocytes) cells from pluripotent stem cells.
The etiology of these immune diseases, disorders, and/or conditions
may be genetic, somatic, such as cancer and some autoimmune
diseases, acquired (e.g., by chemotherapy or toxins), or
infectious. Moreover, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
can be used as a marker or detector of a particular immune system
disease or disorder.
[0400] In another embodiment, a fusion protein of the invention
and/or polynucleotide encoding an albumin fusion protein of the
invention, may be used to treat diseases and disorders of the
immune system and/or to inhibit or enhance an immune response
generated by cells associated with the tissue(s) in which the
polypeptide of the invention is expressed.
[0401] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be useful in treating, preventing, diagnosing, and/or
prognosing immunodeficiencies, including both congenital and
acquired immunodeficiencies. Examples of B cell immunodeficiencies
in which immunoglobulin levels B cell function and/or B cell
numbers are decreased include: X-linked agammaglobulinemia
(Bruton's disease), X-linked infantile agammaglobulinemia, X-linked
immunodeficiency with hyper IgM, non X-linked immunodeficiency with
hyper IgM, X-linked lymphoproliferative syndrome (XLP),
agammaglobulinemia including congenital and acquired
agammaglobulinemia, adult onset agammaglobulinemia, late-onset
agammaglobulinemia, dysgammaglobulinemia, hypogammaglobulinemia,
unspecified hypogammaglobulinemia, recessive agammaglobulinemia
(Swiss type), Selective IgM deficiency, selective IgA deficiency,
selective IgG subclass deficiencies, IgG subclass deficiency (with
or without IgA deficiency), Ig deficiency with increased IgM, IgG
and IgA deficiency with increased IgM, antibody deficiency with
normal or elevated Igs, Ig heavy chain deletions, kappa chain
deficiency, B cell lymphoproliferative disorder (BLPD), common
variable immunodeficiency (CVID), common variable immunodeficiency
(CVI) (acquired), and transient hypogammaglobulinemia of
infancy.
[0402] In specific embodiments, ataxia-telangiectasia or conditions
associated with ataxia-telangiectasia are treated, prevented,
diagnosed, and/or prognosing using the, fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention.
[0403] Examples of congenital immunodeficiencies in which T cell
and/or B cell function and/or number is decreased include, but are
not limited to: DiGeorge anomaly, severe combined
immunodeficiencies (SCID) (including, but not limited to, X-linked
SCID, autosomal recessive SCID, adenosine deaminase deficiency,
purine nucleoside phosphorylase (PNP) deficiency, Class II MHC
deficiency (Bare lymphocyte syndrome), Wiskott-Aldrich syndrome,
and ataxia telangiectasia), thymic hypoplasia, third and fourth
pharyngeal pouch syndrome, 22q11.2 deletion, chronic mucocutaneous
candidiasis, natural killer cell deficiency (NK), idiopathic CD4+
T-lymphocytopenia, immunodeficiency with predominant T cell defect
(unspecified), and unspecified immunodeficiency of cell mediated
immunity.
[0404] In specific embodiments, DiGeorge anomaly or conditions
associated with DiGeorge anomaly are treated, prevented, diagnosed,
and/or prognosed using fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the
invention.
[0405] Other immunodeficiencies that may be treated, prevented,
diagnosed, and/or prognosed using fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention, include, but are not limited to, chronic granulomatous
disease, Chediak-Higashi syndrome, myeloperoxidase deficiency,
leukocyte glucose-6-phosphate dehydrogenase deficiency, X-linked
lymphoproliferative syndrome (XLP), leukocyte adhesion deficiency,
complement component deficiencies (including C1, C2, C3, C4, C5,
C6, C7, C8 and/or C9 deficiencies), reticular dysgenesis, thymic
alymphoplasia-aplasia, immunodeficiency with thymoma, severe
congenital leukopenia, dysplasia with immunodeficiency, neonatal
neutropenia, short limbed dwarfism, and Nezelof syndrome-combined
immunodeficiency with Igs.
[0406] In a preferred embodiment, the immunodeficiencies and/or
conditions associated with the immunodeficiencies recited above are
treated, prevented, diagnosed and/or prognosed using fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention.
[0407] In a preferred embodiment fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention could be used as an agent to boost immunoresponsiveness
among immunodeficient individuals. In specific embodiments, fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention could be used as an agent to boost
immunoresponsiveness among B cell and/or T cell immunodeficient
individuals.
[0408] The albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be useful in treating, preventing, diagnosing and/or prognosing
autoimmune disorders. Many autoimmune disorders result from
inappropriate recognition of self as foreign material by immune
cells. This inappropriate recognition results in an immune response
leading to the destruction of the host tissue. Therefore, the
administration of fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
that can inhibit an immune response, particularly the
proliferation, differentiation, or chemotaxis of T-cells, may be an
effective therapy in preventing autoimmune disorders.
[0409] Autoimmune diseases or disorders that may be treated,
prevented, diagnosed and/or prognosed by fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention include, but are not limited to, one or more of
the following; systemic lupus erythematosus, rheumatoid arthritis,
ankylosing spondylitis, multiple sclerosis, autoimmune thyroiditis,
Hashimoto's thyroiditis, autoimmune hemolytic anemia, hemolytic
anemia, thrombocytopenia, autoimmune thrombocytopenia purpura,
autoimmune neonatal thrombocytopenia, idiopathic thrombocytopenia
purpura, purpura (e.g., Henloch-Scoenlein purpura),
autoimmunocytopenia, Goodpasture's syndrome, Pemphigus vulgaris,
myasthenia gravis, Grave's disease (hyperthyroidism), and
insulin-resistant diabetes mellitus.
[0410] Additional disorders that are likely to have an autoimmune
component that may be treated, prevented, and/or diagnosed with the
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention include, but are
not limited to, type II collagen-induced arthritis,
antiphospholipid syndrome, dermatitis, allergic encephalomyelitis,
myocarditis, relapsing polychondritis, rheumatic heart disease,
neuritis, uveitis ophthalmia, polyendocrinopathies, Reiter's
Disease, Stiff-Man Syndrome, autoimmune pulmonary inflammation,
autism, Guillain-Barre Syndrome, insulin dependent diabetes
mellitus, and autoimmune inflammatory eye disorders.
[0411] Additional disorders that are likely to have an autoimmune
component that may be treated, prevented, diagnosed and/or
prognosed with the albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include, but are not limited to, scleroderma with anti-collagen
antibodies (often characterized, e.g., by nucleolar and other
nuclear antibodies), mixed connective tissue disease (often
characterized, e.g., by antibodies to extractable nuclear antigens
(e.g., ribonucleoprotein)), polymyositis (often characterized,
e.g., by nonhistone ANA), pernicious anemia (often characterized,
e.g., by antiparietal cell, microsomes, and intrinsic factor
antibodies), idiopathic Addison's disease (often characterized,
e.g., by humoral and cell-mediated adrenal cytotoxicity,
infertility (often characterized, e.g., by antispermatozoal
antibodies), glomerulonephritis (often characterized, e.g., by
glomerular basement membrane antibodies or immune complexes),
bullous pemphigoid (often characterized, e.g., by IgG and
complement in basement membrane), Sjogren's syndrome (often
characterized, e.g., by multiple tissue antibodies, and/or a
specific nonhistone ANA (SS-B)), diabetes mellitus (often
characterized, e.g., by cell-mediated and humoral islet cell
antibodies), and adrenergic drug resistance (including adrenergic
drug resistance with asthma or cystic fibrosis) (often
characterized, e.g., by beta-adrenergic receptor antibodies).
[0412] Additional disorders that may have an autoimmune component
that may be treated, prevented, diagnosed and/or prognosed with the
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention include, but are
not limited to, chronic active hepatitis (often characterized,
e.g., by smooth muscle antibodies), primary biliary cirrhosis
(often characterized, e.g., by mitochondria antibodies), other
endocrine gland failure (often characterized, e.g., by specific
tissue antibodies in some cases), vitiligo (often characterized,
e.g., by melanocyte antibodies), vasculitis (often characterized,
e.g., by Ig and complement in vessel walls and/or low serum
complement), post-MI (often characterized, e.g., by myocardial
antibodies), cardiotomy syndrome (often characterized, e.g., by
myocardial antibodies), urticaria (often characterized, e.g., by
IgG and IgM antibodies to IgE), atopic dermatitis (often
characterized, e.g., by IgG and IgM antibodies to IgE), asthma
(often characterized, e.g., by IgG and IgM antibodies to IgE), and
many other inflammatory, granulomatous, degenerative, and atrophic
disorders.
[0413] In a preferred embodiment, the autoimmune diseases and
disorders and/or conditions associated with the diseases and
disorders recited above are treated, prevented, diagnosed and/or
prognosed using for example, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention. In a specific preferred embodiment, rheumatoid arthritis
is treated, prevented, and/or diagnosed using fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention.
[0414] In another specific preferred embodiment, systemic lupus
erythematosus is treated, prevented, and/or diagnosed using fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention. In another specific preferred
embodiment, idiopathic thrombocytopenia purpura is treated,
prevented, and/or diagnosed using fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention.
[0415] In another specific preferred embodiment IgA nephropathy is
treated, prevented, and/or diagnosed using fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention.
[0416] In a preferred embodiment, the autoimmune diseases and
disorders and/or conditions associated with the diseases and
disorders recited above are treated, prevented, diagnosed and/or
prognosed using fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the
invention.
[0417] In preferred embodiments, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention are used as a immunosuppressive agent(s).
[0418] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be useful in treating, preventing, prognosing, and/or
diagnosing diseases, disorders, and/or conditions of hematopoietic
cells. Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
could be used to increase differentiation and proliferation of
hematopoietic cells, including the pluripotent stem cells, in an
effort to treat or prevent those diseases, disorders, and/or
conditions associated with a decrease in certain (or many) types
hematopoietic cells, including but not limited to, leukopenia,
neutropenia, anemia, and thrombocytopenia. Alternatively, fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention could be used to increase
differentiation and proliferation of hematopoietic cells, including
the pluripotent stem cells, in an effort to treat or prevent those
diseases, disorders, and/or conditions associated with an increase
in certain (or many) types of hematopoietic cells, including but
not limited to, histiocytosis.
[0419] Allergic reactions and conditions, such as asthma
(particularly allergic asthma) or other respiratory problems, may
also be treated, prevented, diagnosed and/or prognosed using fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention. Moreover, these molecules can be
used to treat, prevent, prognose, and/or diagnose anaphylaxis,
hypersensitivity to an antigenic molecule, or blood group
incompatibility.
[0420] Additionally, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
may be used to treat, prevent, diagnose and/or prognose
IgE-mediated allergic reactions. Such allergic reactions include,
but are not limited to, asthma, rhinitis, and eczema. In specific
embodiments, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be used to modulate IgE concentrations in vitro or in vivo.
[0421] Moreover, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
have uses in the diagnosis, prognosis, prevention, and/or treatment
of inflammatory conditions. For example, since fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention may inhibit the activation, proliferation
and/or differentiation of cells involved in an inflammatory
response, these molecules can be used to prevent and/or treat
chronic and acute inflammatory conditions. Such inflammatory
conditions include, but are not limited to; for example,
inflammation associated with infection (e.g., septic shock, sepsis,
or systemic inflammatory response syndrome), ischemia-reperfusion
injury, endotoxin lethality, complement-mediated hyperacute
rejection, nephritis, cytokine or chemokine induced lung injury,
inflammatory bowel disease, Crohn's disease, over production of
cytokines (e.g., TNF or IL-1.), respiratory disorders (e.g., asthma
and allergy); gastrointestinal disorders (e.g., inflammatory bowel
disease); cancers (e.g., gastric, ovarian, lung, bladder, liver,
and breast); CNS disorders (e.g., multiple sclerosis; ischemic
brain injury and/or stroke, traumatic brain injury,
neurodegenerative disorders (e.g., Parkinson's disease and
Alzheimer's disease); AIDS-related dementia; and prion disease);
cardiovascular disorders (e.g., atherosclerosis, myocarditis,
cardiovascular disease, and cardiopulmonary bypass complications);
as well as many additional diseases, conditions, and disorders that
are characterized by inflammation (e.g., hepatitis, rheumatoid
arthritis, gout, trauma, pancreatitis, sarcoidosis, dermatitis,
renal ischemia-reperfusion injury, Grave's disease, systemic lupus
erythematosus, diabetes mellitus, and allogenic transplant
rejection).
[0422] Because inflammation is a fundamental defense mechanism,
inflammatory disorders can effect virtually any tissue of the body.
Accordingly, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
have uses in the treatment of tissue-specific inflammatory
disorders, including, but not limited to, adrenalitis, alveolitis,
angiocholecystitis, appendicitis, balanitis, blepharitis,
bronchitis, bursitis, carditis, cellulitis, cervicitis,
cholecystitis, chorditis, cochlitis, colitis, conjunctivitis,
cystitis, dermatitis, diverticulitis, encephalitis, endocarditis,
esophagitis, eustachitis, fibrositis, folliculitis, gastritis,
gastroenteritis, gingivitis, glossitis, hepatosplenitis, keratitis,
labyrinthitis, laryngitis, lymphangitis, mastitis, media otitis,
meningitis, metritis, mucitis, myocarditis, myosititis, myringitis,
nephritis, neuritis, orchitis, osteochondritis, otitis,
pericarditis, peritendonitis, peritonitis, pharyngitis, phlebitis,
poliomyelitis, prostatitis, pulpitis, retinitis, rhinitis,
salpingitis, scleritis, sclerochoroiditis, scrotitis, sinusitis,
spondylitis, steatitis, stomatitis, synovitis, syringitis,
tendonitis, tonsillitis, urethritis, and vaginitis.
[0423] In specific embodiments, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention, are useful to diagnose, prognose, prevent, and/or treat
organ transplant rejections and graft-versus-host disease. Organ
rejection occurs by host immune cell destruction of the
transplanted tissue through an immune response. Similarly, an
immune response is also involved in GVHD, but, in this case, the
foreign transplanted immune cells destroy the host tissues.
Polypeptides, antibodies, or polynucleotides of the invention,
and/or agonists or antagonists thereof, that inhibit an immune
response, particularly the activation, proliferation,
differentiation, or chemotaxis of T-cells, may be an effective
therapy in preventing organ rejection or GVHD. In specific
embodiments, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
that inhibit an immune response, particularly the activation,
proliferation, differentiation, or chemotaxis of T-cells, may be an
effective therapy in preventing experimental allergic and
hyperacute xenograft rejection.
[0424] In other embodiments, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention, are useful to diagnose, prognose, prevent, and/or treat
immune complex diseases, including, but not limited to, serum
sickness, post streptococcal glomerulonephritis, polyarteritis
nodosa, and immune complex-induced vasculitis.
[0425] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
can be used to treat, detect, and/or prevent infectious agents. For
example, by increasing the immune response, particularly increasing
the proliferation activation and/or differentiation of B and/or T
cells, infectious diseases may be treated, detected, and/or
prevented. The immune response may be increased by either enhancing
an existing immune response, or by initiating a new immune
response. Alternatively, fusion proteins of the, invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may also directly inhibit the infectious agent (refer to section of
application listing infectious agents, etc), without necessarily
eliciting an immune response.
[0426] In another embodiment, albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention are used as a vaccine adjuvant that enhances
immune responsiveness to an antigen. In a specific embodiment,
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention are used as an
adjuvant to enhance tumor-specific immune responses.
[0427] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an adjuvant to enhance
anti-viral immune responses. Anti-viral immune responses that may
be enhanced using the compositions of the invention as an adjuvant,
include virus and virus associated diseases or symptoms described
herein or otherwise known in the art. In specific embodiments, the
compositions of the invention are used as an adjuvant to enhance an
immune response to a virus, disease, or symptom selected from the
group consisting of: AIDS, meningitis, Dengue, EBV, and hepatitis
(e.g., hepatitis B). In another specific embodiment, the
compositions of the invention are used as an adjuvant to enhance an
immune response to a virus, disease, or symptom selected from the
group consisting of: HIV/AIDS, respiratory syncytial virus, Dengue,
rotavirus, Japanese B encephalitis, influenza A and B,
parainfluenza, measles, cytomegalovirus, rabies, Junin,
Chikungunya, Rift Valley Fever, herpes simplex, and yellow
fever.
[0428] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an adjuvant to enhance
anti-bacterial or anti-fungal immune responses. Anti-bacterial or
anti-fungal immune responses that may be enhanced using the
compositions of the invention as an adjuvant, include bacteria or
fungus and bacteria or fungus associated diseases or symptoms
described herein or otherwise known in the art. In specific
embodiments, the compositions of the invention are used as an
adjuvant to enhance an immune response to a bacteria or fungus,
disease, or symptom selected from the group consisting of: tetanus,
Diphtheria, botulism, and meningitis type B.
[0429] In another specific embodiment, the compositions of the
invention are used as an adjuvant to enhance an immune response to
a bacteria or fungus, disease, or symptom selected from the group
consisting of: Vibrio cholerae, Mycobacterium leprae, Salmonella
typhi, Salmonella paratyphi, Meisseria meningitidis, Streptococcus
pneumoniae, Group B streptococcus, Shigella spp., Enterotoxigenic
Escherichia coli, Enterohemorrhagic E. coli, and Borrelia
burgdorferi.
[0430] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an adjuvant to enhance
anti-parasitic immune responses. Anti-parasitic immune responses
that may be enhanced using the compositions of the invention as an
adjuvant, include parasite and parasite associated diseases or
symptoms described herein or otherwise known in the art. In
specific embodiments, the compositions of the invention are used as
an adjuvant to enhance an immune response to a parasite. In another
specific embodiment, the compositions of the invention are used as
an adjuvant to enhance an immune response to Plasmodium (malaria)
or Leishmania.
[0431] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention may also be employed to treat infectious
diseases including silicosis, sarcoidosis, and idiopathic pulmonary
fibrosis; for example, by preventing the recruitment and activation
of mononuclear phagocytes.
[0432] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an antigen for the generation
of antibodies to inhibit or enhance immune mediated responses
against polypeptides of the invention.
[0433] In one embodiment, albumin fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention are administered to an animal (e.g., mouse, rat, rabbit,
hamster, guinea pig, pigs, micro-pig, chicken, camel, goat, horse,
cow, sheep, dog, cat, non-human primate, and human, most preferably
human) to boost the immune system to produce increased quantities
of one or more antibodies (e.g., IgG, IgA, IgM, and IgE), to induce
higher affinity antibody production and immunoglobulin class
switching (e.g., IgG, IgA, IgM, and IgE), and/or to increase an
immune response.
[0434] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a stimulator of B cell
responsiveness to pathogens.
[0435] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an activator of T cells.
[0436] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an agent that elevates the
immune status of an individual prior to their receipt of
immunosuppressive therapies.
[0437] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an agent to induce higher
affinity antibodies.
[0438] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an agent to increase serum
immunoglobulin concentrations.
[0439] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an agent to accelerate
recovery of immunocompromised individuals.
[0440] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an agent to boost
immunoresponsiveness among aged populations and/or neonates.
[0441] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an immune system enhancer
prior to, during, or after bone marrow transplant and/or other
transplants (e.g., allogeneic or xenogeneic organ transplantation).
With respect to transplantation, compositions of the invention may
be administered prior to, concomitant with, and/or after
transplantation. In a specific embodiment, compositions of the
invention are administered after transplantation, prior to the
beginning of recovery of T-cell populations. In another specific
embodiment, compositions of the invention are first administered
after transplantation after the beginning of recovery of T cell
populations, but prior to full recovery of B cell populations.
[0442] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an agent to boost
immunoresponsiveness among individuals having an acquired loss of B
cell function. Conditions resulting in an acquired loss of B cell
function that may be ameliorated or treated by administering the
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention, include, but are
not limited to, HIV Infection, AIDS, bone marrow transplant, and B
cell chronic lymphocytic leukemia (CLL).
[0443] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an agent to boost
immunoresponsiveness among individuals having a temporary immune
deficiency. Conditions resulting in a temporary immune deficiency
that may be ameliorated or treated by administering the albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention, include, but are not
limited to, recovery from viral infections (e.g., influenza),
conditions associated with malnutrition, recovery from infectious
mononucleosis, or conditions associated with stress, recovery from
measles, recovery from blood transfusion, and recovery from
surgery.
[0444] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a regulator of antigen
presentation by monocytes, dendritic cells, and/or B-cells. In one
embodiment, albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
enhance antigen presentation or antagonizes antigen presentation in
vitro or in vivo. Moreover, in related embodiments, this
enhancement or antagonism of antigen presentation may be useful as
an anti-tumor treatment or to modulate the immune system.
[0445] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as an agent to direct an
individual's immune system towards development of a humoral
response (i.e. TH2) as opposed to a TH1 cellular response.
[0446] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a means to induce tumor
proliferation and thus make it more susceptible to anti-neoplastic
agents. For example, multiple myeloma is a slowly dividing disease
and is thus refractory to virtually all anti-neoplastic regimens.
If these cells were forced to proliferate more rapidly their
susceptibility profile would likely change.
[0447] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a stimulator of B cell
production in pathologies such as AIDS, chronic lymphocyte disorder
and/or Common Variable Immunodificiency.
[0448] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a therapy for generation
and/or regeneration of lymphoid tissues following surgery, trauma
or genetic defect. In another specific embodiment, albumin fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention are used in the pretreatment of
bone marrow samples prior to transplant.
[0449] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a gene-based therapy for
genetically inherited disorders resulting in
immuno-incompetence/immunodeficiency such as observed among SCID
patients.
[0450] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a means of activating
monocytes/macrophages to defend against parasitic diseases that
effect monocytes such as Leishmania.
[0451] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a means of regulating
secreted cytokines that are elicited by polypeptides of the
invention.
[0452] In another embodiment, albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention are used in one or more of the applications
described herein, as they may apply to veterinary medicine.
[0453] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a means of blocking various
aspects of immune responses to foreign agents or self. Examples of
diseases or conditions in which blocking of certain aspects of
immune responses may be desired include autoimmune disorders such
as lupus, and arthritis, as well as immunoresponsiveness to skin
allergies, inflammation, bowel disease, injury and
diseases/disorders associated with pathogens.
[0454] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a therapy for preventing the
B cell proliferation and Ig secretion associated with autoimmune
diseases such as idiopathic thrombocytopenic purpura, systemic
lupus erythematosus and multiple sclerosis.
[0455] In another specific embodiment, polypeptides, antibodies,
polynucleotides and/or agonists or antagonists of the present
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention invention are used as a
inhibitor of B and/or T cell migration in endothelial cells. This
activity disrupts tissue architecture or cognate responses and is
useful, for example in disrupting immune responses, and blocking
sepsis.
[0456] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a therapy for chronic
hypergammaglobulinemia evident in such diseases as monoclonal
gammopathy of undetermined significance (MGUS), Waldenstrom's
disease, related idiopathic monoclonal gammopathies, and
plasmacytomas.
[0457] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention may be employed for instance to inhibit
polypeptide chemotaxis and activation of macrophages and their
precursors, and of neutrophils, basophils, B lymphocytes and some
T-cell subsets, e.g., activated and CD8 cytotoxic T cells and
natural killer cells, in certain autoimmune and chronic
inflammatory and infective diseases. Examples of autoimmune
diseases are described herein and include multiple sclerosis, and
insulin-dependent diabetes.
[0458] The albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may also be employed to treat idiopathic hyper-eosinophilic
syndrome by, for example, preventing eosinophil production and
migration.
[0459] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used to enhance or inhibit complement
mediated cell lysis.
[0460] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used to enhance or inhibit antibody
dependent cellular cytotoxicity.
[0461] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention may also be employed for treating
atherosclerosis, for example, by preventing monocyte infiltration
in the artery wall.
[0462] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention may be employed to treat adult
respiratory distress syndrome (ARDS).
[0463] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention may be useful for stimulating wound and
tissue repair, stimulating angiogenesis, and/or stimulating the
repair of vascular or lymphatic diseases or disorders.
Additionally, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be used to stimulate the regeneration of mucosal surfaces.
[0464] In a specific embodiment, albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention are used to diagnose, prognose, treat, and/or
prevent a disorder characterized by primary or acquired
immunodeficiency, deficient serum immunoglobulin production,
recurrent infections, and/or immune system dysfunction. Moreover,
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention may be used to treat or
prevent infections of the joints, bones, skin, and/or parotid
glands, blood-borne infections (e.g., sepsis, meningitis, septic
arthritis, and/or osteomyelitis), autoimmune diseases (e.g., those
disclosed herein), inflammatory disorders, and malignancies, and/or
any disease or disorder or condition associated with these
infections, diseases, disorders and/or malignancies) including, but
not limited to, CVID, other primary immune deficiencies, HIV
disease, CLL, recurrent bronchitis, sinusitis, otitis media,
conjunctivitis, pneumonia, hepatitis, meningitis, herpes zoster
(e.g., severe herpes zoster), and/or pneumocystis cam. Other
diseases and disorders that may be prevented, diagnosed, prognosed,
and/or treated with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include, but are not limited to, HIV infection, HTLV-BLV infection,
lymphopenia, phagocyte bactericidal dysfunction anemia,
thrombocytopenia, and hemoglobinuria.
[0465] In another embodiment, albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention are used to treat, and/or diagnose an individual
having common variable immunodeficiency disease ("CVID"; also known
as "acquired agammaglobulinemia" and "acquired
hypogammaglobulinemia") or a subset of this disease.
[0466] In a specific embodiment, albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be used to diagnose, prognose, prevent, and/or
treat cancers or neoplasms including immune cell or immune
tissue-related cancers or neoplasms. Examples of cancers or
neoplasms that may be prevented, diagnosed, or treated by fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention include, but are not limited to,
acute myelogenous leukemia, chronic myelogenous leukemia, Hodgkin's
disease, non-Hodgkin's lymphoma, acute lymphocytic anemia (ALL)
Chronic lymphocyte leukemia, plasmacytomas, multiple myeloma,
Burkitt's lymphoma, EBV-transformed diseases, and/or diseases and
disorders described in the section entitled "Hyperproliferative
Disorders" elsewhere herein.
[0467] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a therapy for decreasing
cellular proliferation of Large B-cell Lymphomas.
[0468] In another specific embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used as a means of decreasing the
involvement of B cells and Ig associated with Chronic Myelogenous
Leukemia.
[0469] In specific embodiments, the compositions of the invention
are used as an agent to boost immunoresponsiveness among B cell
immunodeficient individuals, such as, for example, an individual
who has undergone a partial or complete splenectomy.
Blood-Related Disorders
[0470] The albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be used to modulate hemostatic (the stopping of bleeding) or
thrombolytic (clot dissolving) activity. For example, by increasing
hemostatic or thrombolytic activity, fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention could be used to treat or prevent blood
coagulation diseases, disorders, and/or conditions (e.g.,
afibrinogenemia, factor deficiencies, hemophilia), blood platelet
diseases, disorders, and/or conditions (e.g., thrombocytopenia), or
wounds resulting from trauma, surgery, or other causes.
Alternatively, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
that can decrease hemostatic or thrombolytic activity could be used
to inhibit or dissolve clotting. These molecules could be important
in the treatment or prevention of heart attacks (infarction),
strokes, or scarring.
[0471] In specific embodiments, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be used to prevent, diagnose, prognose, and/or
treat thrombosis, arterial thrombosis, venous thrombosis,
thromboembolism, pulmonary embolism, atherosclerosis, myocardial
infarction, transient ischemic attack, unstable angina. In specific
embodiments, the albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be used for the prevention of occulsion of saphenous grafts,
for reducing the risk of periprocedural thrombosis as might
accompany angioplasty procedures, for reducing the risk of stroke
in patients with atrial fibrillation including nonrheumatic atrial
fibrillation, for reducing the risk of embolism associated with
mechanical heart valves and or mitral valves disease. Other uses
for the albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
include, but are not limited to, the prevention of occlusions in
extrcorporeal devices (e.g., intravascular canulas, vascular access
shunts in hemodialysis patients, hemodialysis machines, and
cardiopulmonary bypass machines).
[0472] In another embodiment, albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention, may be used to prevent, diagnose, prognose,
and/or treat diseases and disorders of the blood and/or blood
forming organs associated with the tissue(s) in which the
polypeptide of the invention is expressed.
[0473] The fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention may be used to
modulate hematopoietic activity (the formation of blood cells). For
example, the albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be used to increase the quantity of all or subsets of blood
cells, such as, for example, erythrocytes, lymphocytes (B or T
cells), myeloid cells (e.g., basophils, eosinophils, neutrophils,
mast cells, macrophages) and platelets. The ability to decrease the
quantity of blood cells or subsets of blood cells may be useful in
the prevention, detection, diagnosis and/or treatment of anemias
and leukopenias described below. Alternatively, the albumin fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention may be used to decrease the
quantity of all or subsets of blood cells, such as, for example,
erythrocytes, lymphocytes (B or T cells), myeloid cells (e.g.,
basophils, eosinophils, neutrophils, mast cells, macrophages) and
platelets. The ability to decrease the quantity of blood cells or
subsets of blood cells may be useful in the prevention, detection,
diagnosis and/or treatment of leukocytoses, such as, for example
eosinophilia.
[0474] The fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention may be used to
prevent, treat, or diagnose blood dyscrasia.
[0475] Anemias are conditions in which the number of red blood
cells or amount of hemoglobin (the protein that carries oxygen) in
them is below normal. Anemia may be caused by excessive bleeding,
decreased red blood cell production, or increased red blood cell
destruction (hemolysis). The albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful in treating, preventing, and/or
diagnosing anemias. Anemias that may be treated prevented or
diagnosed by the albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include iron deficiency anemia, hypochromic anemia, microcytic
anemia, chlorosis, hereditary sideroblastic anemia, idiopathic
acquired sideroblastic anemia, red cell aplasia, megaloblastic
anemia (e.g., pernicious anemia, (vitamin B 12 deficiency) and
folic acid deficiency anemia), aplastic anemia, hemolytic anemias
(e.g., autoimmune helolytic anemia, microangiopathic hemolytic
anemia, and paroxysmal nocturnal hemoglobinuria). The albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention may be useful in treating,
preventing, and/or diagnosing anemias associated with diseases
including but not limited to, anemias associated with systemic
lupus erythematosus, cancers, lymphomas, chronic renal disease, and
enlarged spleens. The albumin fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention may be useful in treating, preventing, and/or diagnosing
anemias arising from drug treatments such as anemias associated
with methyldopa, dapsone, and/or sulfadrugs. Additionally, fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention may be useful in treating,
preventing, and/or diagnosing anemias associated with abnormal red
blood cell architecture including but not limited to, hereditary
spherocytosis, hereditary elliptocytosis, glucose-6-phosphate
dehydrogenase deficiency, and sickle cell anemia.
[0476] The albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be useful in treating, preventing, and/or diagnosing hemoglobin
abnormalities, (e.g., those associated with sickle cell anemia,
hemoglobin C disease, hemoglobin S-C disease, and hemoglobin E
disease). Additionally, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful in diagnosing, prognosing,
preventing, and/or treating thalassemias, including, but not
limited to, major and minor forms of alpha-thalassemia and
beta-thalassemia.
[0477] In another embodiment, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful in diagnosing, prognosing,
preventing, and/or treating bleeding disorders including, but not
limited to, thrombocytopenia (e.g., idiopathic thrombocytopenic
purpura, and thrombotic thrombocytopenic purpura), Von Willebrand's
disease, hereditary platelet disorders (e.g., storage pool disease
such as Chediak-Higashi and Hermansky-Pudlak syndromes, thromboxane
A2 dysfunction, thromboasthenia, and Bernard-Soulier syndrome),
hemolytic-uremic syndrome, hemophelias such as hemophelia A or
Factor VII deficiency and Christmas disease or Factor IX
deficiency, Hereditary Hemorhhagic Telangiectsia, also known as
Rendu-Osler-Weber syndrome, allergic purpura (Henoch Schonlein
purpura) and disseminated intravascular coagulation.
[0478] The effect of the albumin fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention on the clotting time of blood may be monitored using any
of the clotting tests known in the art including, but not limited
to, whole blood partial thromboplastin time (PTT), the activated
partial thromboplastin time (aPTT), the activated clotting time
(ACT), the recalcified activated clotting time, or the Lee-White
Clotting time.
[0479] Several diseases and a variety of drugs can cause platelet
dysfunction. Thus, in a specific embodiment, the albumin fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention may be useful in diagnosing,
prognosing, preventing, and/or treating acquired platelet
dysfunction such as platelet dysfunction accompanying kidney
failure, leukemia, multiple myeloma, cirrhosis of the liver, and
systemic lupus erythematosus as well as platelet dysfunction
associated with drug treatments, including treatment with aspirin,
ticlopidine, nonsteroidal anti-inflammatory drugs (used for
arthritis, pain, and sprains), and penicillin in high doses.
[0480] In another embodiment, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful in diagnosing, prognosing,
preventing, and/or treating diseases and disorders characterized by
or associated with increased or decreased numbers of white blood
cells. Leukopenia occurs when the number of white blood cells
decreases below normal. Leukopenias include, but are not limited
to, neutropenia and lymphocytopenia. An increase in the number of
white blood cells compared to normal is known as leukocytosis. The
body generates increased numbers of white blood cells during
infection. Thus, leukocytosis may simply be a normal physiological
parameter that reflects infection. Alternatively, leukocytosis may
be an indicator of injury or other disease such as cancer.
Leokocytoses, include but are not limited to, eosinophilia, and
accumulations of macrophages. In specific embodiments, the albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention may be useful in
diagnosing, prognosing, preventing, and/or treating leukopenia. In
other specific embodiments, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful in diagnosing, prognosing,
preventing, and/or treating leukocytosis.
[0481] Leukopenia may be a generalized decreased in all types of
white blood cells, or may be a specific depletion of particular
types of white blood cells. Thus, in specific embodiments, the
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention may be useful in
diagnosing, prognosing, preventing, and/or treating decreases in
neutrophil numbers, known as neutropenia. Neutropenias that may be
diagnosed, prognosed, prevented, and/or treated by the albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention include, but are not
limited to, infantile genetic agranulocytosis, familial
neutropenia, cyclic neutropenia, neutropenias resulting from or
associated with dietary deficiencies (e.g., vitamin B 12 deficiency
or folic acid deficiency), neutropenias resulting from or
associated with drug treatments (e.g., antibiotic regimens such as
penicillin treatment, sulfonamide treatment, anticoagulant
treatment, anticonvulsant drugs, anti-thyroid drugs, and cancer
chemotherapy), and neutropenias resulting from increased neutrophil
destruction that may occur in association with some bacterial or
viral infections, allergic disorders, autoimmune diseases,
conditions in which an individual has an enlarged spleen (e.g.,
Felty syndrome, malaria and sarcoidosis), and some drug treatment
regimens.
[0482] The albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be useful in diagnosing, prognosing, preventing, and/or
treating lymphocytopenias (decreased numbers of B and/or T
lymphocytes), including, but not limited to, lymphocytopenias
resulting from or associated with stress, drug treatments (e.g.,
drug treatment with corticosteroids, cancer chemotherapies, and/or
radiation therapies), AIDS infection and/or other diseases such as,
for example, cancer, rheumatoid arthritis, systemic lupus
erythematosus, chronic infections, some viral infections and/or
hereditary disorders (e.g., DiGeorge syndrome, Wiskott-Aldrich
Syndrome, severe combined immunodeficiency, ataxia
telangiectsia).
[0483] The albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be useful in diagnosing, prognosing, preventing, and/or
treating diseases and disorders associated with macrophage numbers
and/or macrophage function including, but not limited to, Gaucher's
disease, Niemann-Pick disease, Letterer-Siwe disease and
Hand-Schuller-Christian disease.
[0484] In another embodiment, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful in diagnosing, prognosing,
preventing, and/or treating diseases and disorders associated with
eosinophil numbers and/or eosinophil function including, but not
limited to, idiopathic hypereosinophilic syndrome,
eosinophilia-myalgia syndrome, and Hand-Schuller-Christian
disease.
[0485] In yet another embodiment, the albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention may be useful in diagnosing, prognosing,
preventing, and/or treating leukemias and lymphomas including, but
not limited to, acute lymphocytic (lymphpblastic) leukemia (ALL),
acute myeloid (myelocytic, myelogenous, myeloblastic, or
myelomonocytic) leukemia, chronic lymphocytic leukemia (e.g., B
cell leukemias, T cell leukemias, Sezary syndrome, and Hairy cell
leukenia), chronic myelocytic (myeloid, myelogenous, or
granulocytic) leukemia, Hodgkin's lymphoma, non-hodgkin's lymphoma,
Burkitt's lymphoma, and mycosis fungoides.
[0486] In other embodiments, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful in diagnosing, prognosing,
preventing, and/or treating diseases and disorders of plasma cells
including, but not limited to, plasma cell dyscrasias, monoclonal
gammaopathies, monoclonal gammopathies of undetermined
significance, multiple myeloma, macroglobulinemia, Waldenstrom's
macroglobulinemia, cryoglobulinemia, and Raynaud's phenomenon.
[0487] In other embodiments, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful in treating, preventing, and/or
diagnosing" myeloproliferative disorders, including but not limited
to, polycythemia vera, relative polycythemia, secondary
polycythemia, myelofibrosis, acute myelofibrosis, agnogenic myelod
metaplasia, thrombocythemia, (including both primary and seconday
thrombocythemia) and chronic myelocytic leukemia.
[0488] In other embodiments, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful as a treatment prior to surgery, to
increase blood cell production.
[0489] In other embodiments, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful as an agent to enhance the
migration, phagocytosis, superoxide production, antibody dependent
cellular cytotoxicity of neutrophils, eosionophils and
macrophages.
[0490] In other embodiments, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful as an agent to increase the number
of stem cells in circulation prior to stem cells pheresis. In
another specific embodiment, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful as an agent to increase the number
of stem cells in circulation prior to platelet pheresis.
[0491] In other embodiments, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful as an agent to increase cytokine
production.
[0492] In other embodiments, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be useful in preventing, diagnosing, and/or
treating primary hematopoietic disorders.
Hyperproliferative Disorders
[0493] In certain embodiments, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention can be used to treat or detect hyperproliferative
disorders, including neoplasms. Albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may inhibit the proliferation of the disorder
through direct or indirect interactions. Alternatively, fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention may proliferate other cells which
can inhibit the hyperproliferative disorder.
[0494] For example, by increasing an immune response, particularly
increasing antigenic qualities of the hyperproliferative disorder
or by proliferating, differentiating, or mobilizing T-cells,
hyperproliferative disorders can be treated. This immune response
may be increased by either enhancing an existing immune response,
or by initiating a new immune response. Alternatively, decreasing
an immune response may also be a method of treating
hyperproliferative disorders, such as a chemotherapeutic agent.
[0495] Examples of hyperproliferative disorders that can be treated
or detected by fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include, but are not limited to neoplasms located in the: colon,
abdomen, bone, breast, digestive system, liver, pancreas,
peritoneum, endocrine glands (adrenal, parathyroid, pituitary,
testicles, ovary, thymus, thyroid), eye, head and neck, nervous
(central and peripheral), lymphatic system, pelvis, skin, soft
tissue, spleen, thorax, and urogenital tract.
[0496] Similarly, other hyperproliferative disorders can also be
treated or detected by fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention.
Examples of such hyperproliferative disorders include, but are not
limited to: Acute Childhood Lymphoblastic Leukemia, Acute
Lymphoblastic Leukemia, Acute Lymphocytic Leukemia, Acute Myeloid
Leukemia, Adrenocortical Carcinoma, Adult (Primary) Hepatocellular
Cancer, Adult (Primary) Liver Cancer, Adult Acute Lymphocytic
Leukemia, Adult Acute Myeloid Leukemia, Adult Hodgkin's Disease,
Adult Hodgkin's Lymphoma, Adult Lymphocytic Leukemia, Adult
Non-Hodgkin's Lymphoma, Adult Primary Liver Cancer, Adult Soft
Tissue Sarcoma, AIDS-Related Lymphoma, AIDS-Related Malignancies,
Anal Cancer, Astrocytoma, Bile Duct Cancer, Bladder Cancer, Bone
Cancer, Brain Stem Glioma, Brain Tumors, Breast Cancer, Cancer of
the Renal Pelvis and Ureter, Central Nervous System (Primary)
Lymphoma, Central Nervous System Lymphoma, Cerebellar Astrocytoma,
Cerebral Astrocytoma, Cervical Cancer, Childhood (Primary)
Hepatocellular Cancer, Childhood (Primary) Liver Cancer, Childhood
Acute Lymphoblastic Leukemia, Childhood Acute Myeloid Leukemia,
Childhood Brain Stem Glioma, Childhood Cerebellar Astrocytoma,
Childhood Cerebral Astrocytoma, Childhood Extracranial Germ Cell
Tumors, Childhood Hodgkin's Disease, Childhood Hodgkin's Lymphoma,
Childhood Hypothalamic and Visual Pathway Glioma, Childhood
Lymphoblastic Leukemia, Childhood Medulloblastoma, Childhood
Non-Hodgkin's Lymphoma, Childhood Pineal and Supratentorial
Primitive Neuroectodermal Tumors, Childhood Primary Liver Cancer,
Childhood Rhabdomyosarcoma, Childhood Soft Tissue Sarcoma,
Childhood Visual Pathway and Hypothalamic Glioma, Chronic
Lymphocytic Leukemia, Chronic Myelogenous Leukemia, Colon Cancer,
Cutaneous T-Cell Lymphoma, Endocrine Pancreas Islet Cell Carcinoma,
Endometrial Cancer, Ependymoma, Epithelial Cancer, Esophageal
Cancer, Ewing's Sarcoma and Related Tumors, Exocrine Pancreatic
Cancer, Extracranial Germ Cell Tumor, Extragonadal Germ Cell Tumor,
Extrahepatic Bile Duct Cancer, Eye Cancer, Female Breast Cancer,
Gaucher's Disease, Gallbladder Cancer, Gastric Cancer,
Gastrointestinal Carcinoid Tumor, Gastrointestinal Tumors, Germ
Cell Tumors, Gestational Trophoblastic Tumor, Hairy Cell Leukemia,
Head and Neck Cancer, Hepatocellular Cancer, Hodgkin's Disease,
Hodgkin's Lymphoma, Hypergammaglobulinemia, Hypopharyngeal Cancer,
Intestinal Cancers, Intraocular Melanoma, Islet Cell Carcinoma,
Islet Cell Pancreatic Cancer, Kaposi's Sarcoma, Kidney Cancer,
Laryngeal Cancer, Lip and Oral Cavity Cancer, Liver Cancer, Lung
Cancer, Lymphoproliferative Disorders, Macroglobulinemia, Male
Breast Cancer, Malignant Mesothelioma, Malignant Thymoma,
Medulloblastoma, Melanoma, Mesothelioma, Metastatic Occult Primary
Squamous Neck Cancer, Metastatic Primary Squamous Neck Cancer,
Metastatic Squamous Neck Cancer, Multiple Myeloma, Multiple
Myeloma/Plasma Cell Neoplasm, Myelodysplastic Syndrome, Myelogenous
Leukemia, Myeloid Leukemia, Myeloproliferative Disorders, Nasal
Cavity and Paranasal Sinus Cancer, Nasopharyngeal Cancer,
Neuroblastoma, Non-Hodgkin's Lymphoma During Pregnancy, Nonmelanoma
Skin Cancer, Non-Small Cell Lung Cancer, Occult Primary Metastatic
Squamous Neck Cancer, Oropharyngeal Cancer, Osteo-/Malignant
Fibrous Sarcoma, Osteosarcoma/Malignant Fibrous Histiocytoma,
Osteosarcoma/Malignant Fibrous Histiocytoma of Bone, Ovarian
Epithelial Cancer, Ovarian Germ Cell Tumor, Ovarian Low Malignant
Potential Tumor, Pancreatic Cancer, Paraproteinemias, Purpura,
Parathyroid Cancer, Penile Cancer, Pheochromocytoma, Pituitary
Tumor, Plasma Cell Neoplasm/Multiple Myeloma, Primary Central
Nervous System Lymphoma, Primary Liver Cancer, Prostate Cancer,
Rectal Cancer, Renal Cell Cancer, Renal Pelvis and Ureter Cancer,
Retinoblastoma, Rhabdomyosarcoma, Salivary Gland Cancer,
Sarcoidosis Sarcomas, Sezary Syndrome, Skin Cancer, Small Cell Lung
Cancer, Small Intestine Cancer, Soft Tissue Sarcoma, Squamous Neck
Cancer, Stomach Cancer, Supratentorial Primitive Neuroectodeiinal
and Pineal Tumors, T-Cell Lymphoma, Testicular Cancer, Thymoma,
Thyroid Cancer, Transitional Cell Cancer of the Renal Pelvis and
Ureter, Transitional Renal Pelvis and Ureter Cancer, Trophoblastic
Tumors, Ureter and Renal Pelvis Cell Cancer, Urethral Cancer,
Uterine Cancer, Uterine Sarcoma, Vaginal Cancer, Visual Pathway and
Hypothalamic Glioma, Vulvar Cancer, Waldenstrom's
Macroglobulinemia, Wilms' Tumor, and any other hyperproliferative
disease, besides neoplasia, located in an organ system listed
above.
[0497] In another preferred embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used to diagnose, prognose, prevent,
and/or treat premalignant conditions and to prevent progression to
a neoplastic or malignant state, including but not limited to those
disorders described above. Such uses are indicated in conditions
known or suspected of preceding progression to neoplasia or cancer,
in particular, where non-neoplastic cell growth consisting of
hyperplasia, metaplasia, or most particularly, dysplasia has
occurred (for review of such abnormal growth conditions, see
Robbins and Angell, 1976, Basic Pathology, 2d Ed., W. B. Saunders
Co., Philadelphia, pp. 68-79.)
[0498] Hyperplasia is a form of controlled cell proliferation,
involving an increase in cell number in a tissue or organ, without
significant alteration in structure or function. Hyperplastic
disorders which can be diagnosed, prognosed, prevented, and/or
treated with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include, but are not limited to, angiofollicular mediastinal lymph
node hyperplasia, angiolymphoid hyperplasia with eosinophilia,
atypical melanocytic hyperplasia, basal cell hyperplasia, benign
giant lymph node hyperplasia, cementum hyperplasia, congenital
adrenal hyperplasia, congenital sebaceous hyperplasia, cystic
hyperplasia, cystic hyperplasia of the breast, denture hyperplasia,
ductal hyperplasia, endometrial hyperplasia, fibromuscular
hyperplasia, focal epithelial hyperplasia, gingival hyperplasia,
inflammatory fibrous hyperplasia, inflammatory papillary
hyperplasia, intravascular papillary endothelial hyperplasia,
nodular hyperplasia of prostate, nodular regenerative hyperplasia,
pseudoepitheliomatous hyperplasia, senile sebaceous hyperplasia,
and verrucous hyperplasia.
[0499] Metaplasia is a form of controlled cell growth in which one
type of adult or fully differentiated cell substitutes for another
type of adult cell. Metaplastic disorders which can be diagnosed,
prognosed, prevented, and/or treated with fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention include, but are not limited to, agnogenic myeloid
metaplasia, apocrine metaplasia, atypical metaplasia,
autoparenchymatous metaplasia, connective tissue metaplasia,
epithelial metaplasia, intestinal metaplasia, metaplastic anemia,
metaplastic ossification, metaplastic polyps, myeloid metaplasia,
primary myeloid metaplasia, secondary myeloid metaplasia, squamous
metaplasia, squamous metaplasia of amnion, and symptomatic myeloid
metaplasia.
[0500] Dysplasia is frequently a forerunner of cancer, and is found
mainly in the epithelia; it is the most disorderly form of
non-neoplastic cell growth, involving a loss in individual cell
uniformity and in the architectural orientation of cells.
Dysplastic cells often have abnormally large, deeply stained
nuclei, and exhibit pleomorphism. Dysplasia characteristically
occurs where there exists chronic irritation or inflammation.
Dysplastic disorders which can be diagnosed, prognosed, prevented,
and/or treated with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include, but are not limited to, anhidrotic ectodermal dysplasia,
anterofacial dysplasia, asphyxiating thoracic dysplasia,
atriodigital dysplasia, bronchopulmonary dysplasia, cerebral
dysplasia, cervical dysplasia, chondroectodermal dysplasia,
cleidocranial dysplasia, congenital ectodermal dysplasia,
craniodiaphysial dysplasia, craniocarpotarsal dysplasia,
craniometaphysial dysplasia, dentin dysplasia, diaphysial
dysplasia, ectodermal dysplasia, enamel dysplasia,
encephalo-ophthalmic dysplasia, dysplasia epiphysialis hemimelia,
dysplasia epiphysialis multiplex, dysplasia epiphysialis punctata,
epithelial dysplasia, faciodigitogenital dysplasia, familial
fibrous dysplasia of jaws, familial white folded dysplasia,
fibromuscular dysplasia, fibrous dysplasia of bone, florid osseous
dysplasia, hereditary renal-retinal dysplasia, hidrotic ectodermal
dysplasia, hypohidrotic ectodermal dysplasia, lymphopenic thymic
dysplasia, mammary dysplasia, mandibulofacial dysplasia,
metaphysial dysplasia, Mondini dysplasia, monostotic fibrous
dysplasia, mucoepithelial dysplasia, multiple epiphysial dysplasia,
oculoauriculovertebral dysplasia, oculodentodigital dysplasia,
oculovertebral dysplasia, odontogenic dysplasia,
ophthalmomandibulomelic dysplasia, periapical cemental dysplasia,
polyostotic fibrous dysplasia, pseudoachondroplastic
spondyloepiphysial dysplasia, retinal dysplasia, septo-optic
dysplasia, spondyloepiphysial dysplasia, and ventriculoradial
dysplasia.
[0501] Additional pre-neoplastic disorders which can be diagnosed,
prognosed, prevented, and/or treated with fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention include, but are not limited to, benign
dysproliferative disorders (e.g., benign tumors, fibrocystic
conditions, tissue hypertrophy, intestinal polyps, colon polyps,
and esophageal dysplasia), leukoplakia, keratoses, Bowen's disease,
Farmer's Skin, solar cheilitis, and solar keratosis.
[0502] In another embodiment, albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention, may be used to diagnose and/or prognose disorders
associated with the tissue(s) in which the polypeptide of the
invention is expressed.
[0503] In another embodiment, albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention conjugated to a toxin or a radioactive isotope, as
described herein, may be used to treat cancers and neoplasms,
including, but not limited to, those described herein. In a further
preferred embodiment, albumin fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention conjugated to a toxin or a radioactive isotope, as
described herein, may be used to treat acute myelogenous
leukemia.
[0504] Additionally, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may affect apoptosis, and therefore, would be useful in treating a
number of diseases associated with increased cell survival or the
inhibition of apoptosis. For example, diseases associated with
increased cell survival or the inhibition of apoptosis that could
be diagnosed, prognosed, prevented, and/or treated by
polynucleotides, polypeptides, and/or agonists or antagonists of
the invention, include cancers (such as follicular lymphomas,
carcinomas with p53 mutations, and hormone-dependent tumors,
including, but not limited to colon cancer, cardiac tumors,
pancreatic cancer, melanoma, retinoblastoma, glioblastoma, lung
cancer, intestinal cancer, testicular cancer, stomach cancer,
neuroblastoma, myxoma, myoma, lymphoma, endothelioma,
osteoblastoma, osteoclastoma, osteosarcoma, chondrosarcoma,
adenoma, breast cancer, prostate cancer, Kaposi's sarcoma and
ovarian cancer); autoimmune disorders such as, multiple sclerosis,
Sjogren's syndrome, Hashimoto's thyroiditis, biliary cirrhosis,
Behcet's disease, Crohn's disease, polymyositis, systemic lupus
erythematosus and immune-related glomerulonephritis and rheumatoid
arthritis) and viral infections (such as herpes viruses, pox
viruses and adenoviruses), inflammation, graft v. host disease,
acute graft rejection, and chronic graft rejection.
[0505] In preferred embodiments, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention are used to inhibit growth, progression, and/or
metastasis of cancers, in particular those listed above.
[0506] Additional diseases or conditions associated with increased
cell survival that could be diagnosed, prognosed, prevented, and/or
treated by fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention, include, but are
not limited to, progression, and/or metastases of malignancies and
related disorders such as leukemia (including acute leukemias
(e.g., acute lymphocytic leukemia, acute myelocytic leukemia
(including myeloblastic, promyelocytic, myelomonocytic, monocytic,
and erythroleukemia)) and chronic leukemias (e.g., chronic
myelocytic (granulocytic) leukemia and chronic lymphocytic
leukemia)), polycythemia vera, lymphomas (e.g., Hodgkin's disease
and non-Hodgkin's disease), multiple myeloma, Waldenstrom's
macroglobulinemia, heavy chain disease, and solid tumors including,
but not limited to, sarcomas and carcinomas such as fibrosarcoma,
myxosarcoma, liposarcoma, chondrosarcoma, osteogenic sarcoma,
chordoma, angiosarcoma, endotheliosarcoma, lymphangiosarcoma,
lymphangioendotheliosarcoma, synovioma, mesothelioma, Ewing's
tumor, leiomyosarcoma, rhabdomyosarcoma, colon carcinoma,
pancreatic cancer, breast cancer, ovarian cancer, prostate cancer,
squamous cell carcinoma, basal cell carcinoma, adenocarcinoma,
sweat gland carcinoma, sebaceous gland carcinoma, papillary
carcinoma, papillary adenocarcinomas, cystadenocarcinoma, medullary
carcinoma, bronchogenic carcinoma, renal cell carcinoma, hepatoma,
bile duct carcinoma, choriocarcinoma, seminoma, embryonal
carcinoma, Wilm's tumor, cervical cancer, testicular tumor, lung
carcinoma, small cell lung carcinoma, bladder carcinoma, epithelial
carcinoma, glioma, astrocytoma, medulloblastoma, craniopharyngioma,
ependymoma, pinealoma, emangioblastoma, acoustic neuroma,
oligodendroglioma, menangioma, melanoma, neuroblastoma, and
retinoblastoma.
[0507] Diseases associated with increased apoptosis that could be
diagnosed, prognosed, prevented, and/or treated by fusion proteins
of the invention and/or polynucleotides encoding albumin fusion
proteins of the invention, include AIDS; neurodegenerative
disorders (such as Alzheimer's disease, Parkinson's disease,
amyotrophic lateral sclerosis, retinitis pigmentosa, cerebellar
degeneration and brain tumor or prior associated disease);
autoimmune disorders (such as, multiple sclerosis, Sjogren's
syndrome, Hashimoto's thyroiditis, biliary cirrhosis, Behcet's
disease, Crohn's disease, polymyositis, systemic lupus
erythematosus and immune-related glomerulonephritis and rheumatoid
arthritis) myelodysplastic syndromes (such as aplastic anemia),
graft v. host disease, ischemic injury (such as that caused by
myocardial infarction, stroke and reperfusion injury), liver injury
(e.g., hepatitis related liver injury, ischemia/reperfusion injury,
cholestosis (bile duct injury) and liver cancer); toxin-induced
liver disease (such as that caused by alcohol), septic shock,
cachexia and anorexia.
[0508] Hyperproliferative diseases and/or disorders that could be
diagnosed, prognosed, prevented, and/or treated by fusion proteins
of the invention and/or polynucleotides encoding albumin fusion
proteins of the invention, include, but are not limited to,
neoplasms located in the liver, abdomen, bone, breast, digestive
system, pancreas, peritoneum, endocrine glands (adrenal,
parathyroid, pituitary, testicles, ovary, thymus, thyroid), eye,
head and neck, nervous system (central and peripheral), lymphatic
system, pelvis, skin, soft tissue, spleen, thorax, and urogenital
tract.
[0509] Similarly, other hyperproliferative disorders can also be
diagnosed, prognosed, prevented, and/or treated by fusion proteins
of the invention and/or polynucleotides encoding albumin fusion
proteins of the invention. Examples of such hyperproliferative
disorders include, but are not limited to: hypergammaglobulinemia,
lymphoproliferative disorders, paraproteinemias, purpura,
sarcoidosis, Sezary Syndrome, Waldenstron's macroglobulinemia,
Gaucher's Disease, histiocytosis, and any other hyperproliferative
disease, besides neoplasia, located in an organ system listed
above.
[0510] Another preferred embodiment utilizes polynucleotides
encoding albumin fusion proteins of the invention to inhibit
aberrant cellular division, by gene therapy using the present
invention, and/or protein fusions or fragments thereof.
[0511] Thus, the present invention provides a method for treating
cell proliferative disorders by inserting into an abnormally
proliferating cell a polynucleotide encoding an albumin fusion
protein of the present invention, wherein said polynucleotide
represses said expression.
[0512] Another embodiment of the present invention provides a
method of treating cell-proliferative disorders in individuals
comprising administration of one or more active gene copies of the
present invention to an abnormally proliferating cell or cells. In
a preferred embodiment, polynucleotides of the present invention is
a DNA construct comprising a recombinant expression vector
effective in expressing a DNA sequence encoding said
polynucleotides. In another preferred embodiment of the present
invention, the DNA construct encoding the fusion protein of the
present invention is inserted into cells to be treated utilizing a
retrovirus, or more preferably an adenoviral vector (See G J.
Nabel, et. al., PNAS 1999 96: 324-326, which is hereby incorporated
by reference). In a most preferred embodiment, the viral vector is
defective and will not transform non-proliferating cells, only
proliferating cells. Moreover, in a preferred embodiment, the
polynucleotides of the present invention inserted into
proliferating cells either alone, or in combination with or fused
to other polynucleotides, can then be modulated via an external
stimulus (i.e. magnetic, specific small molecule, chemical, or drug
administration, etc.), which acts upon the promoter upstream of
said polynucleotides to induce expression of the encoded protein
product. As such the beneficial therapeutic affect of the present
invention may be expressly modulated (i.e. to increase, decrease,
or inhibit expression of the present invention) based upon said
external stimulus.
[0513] Polynucleotides of the present invention may be useful in
repressing expression of oncogenic genes or antigens. By
"repressing expression of the oncogenic genes" is intended the
suppression of the transcription of the gene, the degradation of
the gene transcript (pre-message RNA), the inhibition of splicing,
the destruction of the messenger RNA, the prevention of the
post-translational modifications of the protein, the destruction of
the protein, or the inhibition of the normal function of the
protein.
[0514] For local administration to abnormally proliferating cells,
polynucleotides of the present invention may be administered by any
method known to those of skill in the art including, but not
limited to transfection, electroporation, microinjection of cells,
or in vehicles such as liposomes, lipofectin, or as naked
polynucleotides, or any other method described throughout the
specification. The polynucleotide of the present invention may be
delivered by known gene delivery systems such as, but not limited
to, retroviral vectors (Gilboa, J. Virology 44:845 (1982); Hocke,
Nature 320:275 (1986); Wilson, et al., Proc. Natl. Acad. Sci.
U.S.A. 85:3014), vaccinia virus system (Chakrabarty et al., Mol.
Cell Biol. 5:3403 (1985) or other efficient DNA delivery systems
(Yates et al., Nature 313:812 (1985)) known to those skilled in the
art. These references are exemplary only and are hereby
incorporated by reference. In order to specifically deliver or
transfect cells which are abnormally proliferating and spare
non-dividing cells, it is preferable to utilize a retrovirus, or
adenoviral (as described in the art and elsewhere herein) delivery
system known to those of skill in the art. Since host DNA
replication is required for retroviral DNA to integrate and the
retrovirus will be unable to self replicate due to the lack of the
retrovirus genes needed for its life cycle. Utilizing such a
retroviral delivery system for polynucleotides of the present
invention will target said gene and constructs to abnormally
proliferating cells and will spare the non-dividing normal
cells.
[0515] The polynucleotides of the present invention may be
delivered directly to cell proliferative disorder/disease sites in
internal organs, body cavities and the like by use of imaging
devices used to guide an injecting needle directly to the disease
site. The polynucleotides of the present invention may also be
administered to disease sites at the time of surgical
intervention.
[0516] By "cell proliferative disease" is meant any human or animal
disease or disorder, affecting any one or any combination of
organs, cavities, or body parts, which is characterized by single
or multiple local abnormal proliferations of cells, groups of
cells, or tissues, whether benign or malignant.
[0517] Any amount of the polynucleotides of the present invention
may be administered as long as it has a biologically inhibiting
effect on the proliferation of the treated cells. Moreover, it is
possible to administer more than one of the polynucleotide of the
present invention simultaneously to the same site. By "biologically
inhibiting" is meant partial or total growth inhibition as well as
decreases in the rate of proliferation or growth of the cells. The
biologically inhibitory dose may be determined by assessing the
effects of the polynucleotides of the present invention on target
malignant or abnormally proliferating cell growth in tissue
culture, tumor growth in animals and cell cultures, or any other
method known to one of ordinary skill in the art.
[0518] Moreover, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
of the present invention are useful in inhibiting the angiogenesis
of proliferative cells or tissues, either alone, as a protein
fusion, or in combination with other polypeptides directly or
indirectly, as described elsewhere herein. In a most preferred
embodiment, said anti-angiogenesis effect may be achieved
indirectly, for example, through the inhibition of hematopoietic,
tumor-specific cells, such as tumor-associated macrophages (See
Joseph I B, et al. J Natl Cancer Inst, 90(21):1648-53 (1998), which
is hereby incorporated by reference).
[0519] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be useful in inhibiting proliferative cells or tissues through
the induction of apoptosis. These fusion proteins and/or
polynucleotides may act either directly, or indirectly to induce
apoptosis of proliferative cells and tissues, for example in the
activation of a death-domain receptor, such as tumor necrosis
factor (TNF) receptor-1, CD95 (Fas/APO-1), TNF-receptor-related
apoptosis-mediated protein (TRAMP) and TNF-related
apoptosis-inducing ligand (TRAIL) receptor-1 and -2 (See
Schulze-Osthoff K, et. al., Eur J Biochem 254(3):439-59 (1998),
which is hereby incorporated by reference). Moreover, in another
preferred embodiment of the present invention, these fusion
proteins and/or polynucleotides may induce apoptosis through other
mechanisms, such as in the activation of other proteins which will
activate apoptosis, or through stimulating the expression of these
proteins, either alone or in combination with small molecule drugs
or adjuviants, such as apoptonin, galectins, thioredoxins,
anti-inflammatory proteins (See for example, Mutat Res
400(1-2):447-55 (1998), Med Hypotheses. 50(5):423-33 (1998), Chem
Biol Interact. April 24; 111-112:23-34 (1998), J Mol Med.
76(6):402-12 (1998), Int J Tissue React; 20(1):3-15 (1998), which
are all hereby incorporated by reference).
[0520] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
are useful in inhibiting the metastasis of proliferative cells or
tissues. Inhibition may occur as a direct result of administering
these albumin fusion proteins and/or polynucleotides, or
indirectly, such as activating the expression of proteins known to
inhibit metastasis, for example alpha 4 integrins, (See, e.g., Curr
Top Microbiol Immunol 1998; 231:125-41, which is hereby
incorporated by reference). Such thereapeutic affects of the
present invention may be achieved either alone, or in combination
with small molecule drugs or adjuvants.
[0521] In another embodiment, the invention provides a method of
delivering compositions containing the albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention to targeted cells expressing the a
polypeptide bound by, that binds to, or associates with an albumin
fusion protein of the invention. Albumin fusion proteins of the
invention may be associated with with heterologous polypeptides,
heterologous nucleic acids, toxins, or prodrugs via hydrophobic,
hydrophilic, ionic and/or covalent interactions.
[0522] Albumin fusion proteins of the invention are useful in
enhancing the immunogenicity and/or antigenicity of proliferating
cells or tissues, either directly, such as would occur if the
albumin fusion proteins of the invention `vaccinated` the immune
response to respond to proliferative antigens and immunogens, or
indirectly, such as in activating the expression of proteins known
to enhance the immune response (e.g. chemokines), to said antigens
and immunogens.
Renal Disorders
[0523] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
may be used to treat, prevent, diagnose, and/or prognose disorders
of the renal system. Renal disorders which can be diagnosed,
prognosed, prevented, and/or treated with compositions of the
invention include, but are not limited to, kidney failure,
nephritis, blood vessel disorders of kidney, metabolic and
congenital kidney disorders, urinary disorders of the kidney,
autoimmune disorders, sclerosis and necrosis, electrolyte
imbalance, and kidney cancers.
[0524] Kidney diseases which can be diagnosed, prognosed,
prevented, and/or treated with compositions of the invention
include, but are not limited to, acute kidney failure, chronic
kidney failure, atheroembolic renal failure, end-stage renal
disease, inflammatory diseases of the kidney (e.g., acute
glomerulonephritis, postinfectious glomerulonephritis, rapidly
progressive glomerulonephritis, nephrotic syndrome, membranous
glomerulonephritis, familial nephrotic syndrome,
membranoproliferative glomerulonephritis I and II, mesangial
proliferative glomerulonephritis, chronic glomerulonephritis, acute
tubulointerstitial nephritis, chronic tubulointerstitial nephritis,
acute post-streptococcal glomerulonephritis (PSGN), pyelonephritis,
lupus nephritis, chronic nephritis, interstitial nephritis, and
post-streptococcal glomerulonephritis), blood vessel disorders of
the kidneys (e.g., kidney infarction, atheroembolic kidney disease,
cortical necrosis, malignant nephrosclerosis, renal vein
thrombosis, renal underperfusion, renal retinopathy, renal
ischemia-reperfusion, renal artery embolism, and renal artery
stenosis), and kidney disorders resulting form urinary tract
disease (e.g., pyelonephritis, hydronephrosis, urolithiasis (renal
lithiasis, nephrolithiasis), reflux nephropathy, urinary tract
infections, urinary retention, and acute or chronic unilateral
obstructive uropathy.)
[0525] In addition, compositions of the invention can be used to
diagnose, prognose, prevent, and/or treat metabolic and congenital
disorders of the kidney (e.g., uremia, renal amyloidosis, renal
osteodystrophy, renal tubular acidosis, renal glycosuria,
nephrogenic diabetes insipidus, cystinuria, Fanconi's syndrome,
renal fibrocystic osteosis (renal rickets), Hartnup disease,
Bartter's syndrome, Liddle's syndrome, polycystic kidney disease,
medullary cystic disease, medullary sponge kidney, Alport's
syndrome, nail-patella syndrome, congenital nephrotic syndrome,
CRUSH syndrome, horseshoe kidney, diabetic nephropathy, nephrogenic
diabetes insipidus, analgesic nephropathy, kidney stones, and
membranous nephropathy), and autoimmune disorders of the kidney
(e.g., systemic lupus erythematosus (SLE), Goodpasture syndrome,
IgA nephropathy, and IgM mesangial proliferative
glomerulonephritis).
[0526] Compositions of the invention can also be used to diagnose,
prognose, prevent, and/or treat sclerotic or necrotic disorders of
the kidney (e.g., glomerulosclerosis, diabetic nephropathy, focal
segmental glomerulosclerosis (FSGS), necrotizing
glomerulonephritis, and renal papillary necrosis), cancers of the
kidney (e.g., nephroma, hypernephroma, nephroblastoma, renal cell
cancer, transitional cell cancer, renal adenocarcinoma, squamous
cell cancer, and Wilm's tumor), and electrolyte imbalances (e.g.,
nephrocalcinosis, pyuria, edema, hydronephritis, proteinuria,
hyponatremia, hypernatremia, hypokalemia, hyperkalemia,
hypocalcemia, hypercalcemia, hypophosphatemia, and
hyperphosphatemia).
[0527] Compositions of the invention may be administered using any
method known in the art, including, but not limited to, direct
needle injection at the delivery site, intravenous injection,
topical administration, catheter infusion, biolistic injectors,
particle accelerators, gelfoam sponge depots, other commercially
available depot materials, osmotic pumps, oral or suppositorial
solid pharmaceutical formulations, decanting or topical
applications during surgery, aerosol delivery. Such methods are
known in the art. Compositions of the invention may be administered
as part of a Therapeutic, described in more detail below. Methods
of delivering polynucleotides of the invention are described in
more detail herein.
Cardiovascular Disorders
[0528] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
may be used to treat, prevent, diagnose, and/or prognose
cardiovascular disorders, including, but not limited to, peripheral
artery disease, such as limb ischemia.
[0529] Cardiovascular disorders include, but are not limited to,
cardiovascular abnormalities, such as arterio-arterial fistula,
arteriovenous fistula, cerebral arteriovenous malformations,
congenital heart defects, pulmonary atresia, and Scimitar Syndrome.
Congenital heart defects include, but are not limited to, aortic
coarctation, cor triatriatum, coronary vessel anomalies, crisscross
heart, dextrocardia, patent ductus arteriosus, Ebstein's anomaly,
Eisenmenger complex, hypoplastic left heart syndrome, levocardia,
tetralogy of fallot, transposition of great vessels, double outlet
right ventricle, tricuspid atresia, persistent truncus arteriosus,
and heart septal defects, such as aortopulmonary septal defect,
endocardial cushion defects, Lutembacher's Syndrome, trilogy of
Fallot, ventricular heart septal defects.
[0530] Cardiovascular disorders also include, but are not limited
to, heart disease, such as arrhythmias, carcinoid heart disease,
high cardiac output, low cardiac output, cardiac tamponade,
endocarditis (including bacterial), heart aneurysm, cardiac arrest,
congestive heart failure, congestive cardiomyopathy, paroxysmal
dyspnea, cardiac edema, heart hypertrophy, congestive
cardiomyopathy, left ventricular hypertrophy, right ventricular
hypertrophy, post-infarction heart rupture, ventricular septal
rupture, heart valve diseases, myocardial diseases, myocardial
ischemia, pericardial effusion, pericarditis (including
constrictive and tuberculous), pneumopericardium,
postpericardiotomy syndrome, pulmonary heart disease, rheumatic
heart disease, ventricular dysfunction, hyperemia, cardiovascular
pregnancy complications, Scimitar Syndrome, cardiovascular
syphilis, and cardiovascular tuberculosis.
[0531] Arrhythmias include, but are not limited to, sinus
arrhythmia, atrial fibrillation, atrial flutter, bradycardia,
extrasystole, Adams-Stokes Syndrome, bundle-branch block,
sinoatrial block, long QT syndrome, parasystole, Lown-Ganong-Levine
Syndrome, Mahaim-type pre-excitation syndrome,
Wolff-Parkinson-White syndrome, sick sinus syndrome, tachycardias,
and ventricular fibrillation. Tachycardias include paroxysmal
tachycardia, supraventricular tachycardia, accelerated
idioventricular rhythm, atrioventricular nodal reentry tachycardia,
ectopic atrial tachycardia, ectopic junctional tachycardia,
sinoatrial nodal reentry tachycardia, sinus tachycardia, Torsades
de Pointes, and ventricular tachycardia.
[0532] Heart valve diseases include, but are not limited to, aortic
valve insufficiency, aortic valve stenosis, hear murmurs, aortic
valve prolapse, mitral valve prolapse, tricuspid valve prolapse,
mitral valve insufficiency, mitral valve stenosis, pulmonary
atresia, pulmonary valve insufficiency, pulmonary valve stenosis,
tricuspid atresia, tricuspid valve insufficiency, and tricuspid
valve stenosis.
[0533] Myocardial diseases include, but are not limited to,
alcoholic cardiomyopathy, congestive cardiomyopathy, hypertrophic
cardiomyopathy, aortic subvalvular stenosis, pulmonary subvalvular
stenosis, restrictive cardiomyopathy, Chagas cardiomyopathy,
endocardial fibroelastosis, endomyocardial fibrosis, Kearns
Syndrome, myocardial reperfusion injury, and myocarditis.
[0534] Myocardial ischemias include, but are not limited to,
coronary disease, such as angina pectoris, coronary aneurysm,
coronary arteriosclerosis, coronary thrombosis, coronary vasospasm,
myocardial infarction and myocardial stunning.
[0535] Cardiovascular diseases also include vascular diseases such
as aneurysms, angiodysplasia, angiomatosis, bacillary angiomatosis,
Hippel-Lindau Disease, Klippel-Trenaunay-Weber Syndrome,
Sturge-Weber Syndrome, angioneurotic edema, aortic diseases,
Takayasu's Arteritis, aortitis, Leriche's Syndrome, arterial
occlusive diseases, arteritis, enarteritis, polyarteritis nodosa,
cerebrovascular disorders, diabetic angiopathies, diabetic
retinopathy, embolisms, thrombosis, erythromelalgia, hemorrhoids,
hepatic veno-occlusive disease, hypertension, hypotension,
ischemia, peripheral vascular diseases, phlebitis, pulmonary
veno-occlusive disease, Raynaud's disease, CREST syndrome, retinal
vein occlusion, Scimitar syndrome, superior vena cava syndrome,
telangiectasia, atacia telangiectasia, hereditary hemorrhagic
telangiectasia, varicocele, varicose veins, varicose ulcer,
vasculitis, and venous insufficiency.
[0536] Aneurysms include, but are not limited to, dissecting
aneurysms, false aneurysms, infected aneurysms, ruptured aneurysms,
aortic aneurysms, cerebral aneurysms, coronary aneurysms, heart
aneurysms, and iliac aneurysms.
[0537] Arterial occlusive diseases include, but are not limited to,
arteriosclerosis, intermittent claudication, carotid stenosis,
fibromuscular dysplasias, mesenteric vascular occlusion, Moyamoya
disease, renal artery obstruction, retinal artery occlusion, and
thromboangiitis obliterans.
[0538] Cerebrovascular disorders include, but are not limited to,
carotid artery diseases, cerebral amyloid angiopathy, cerebral
aneurysm, cerebral anoxia, cerebral arteriosclerosis, cerebral
arteriovenous malformation, cerebral artery diseases, cerebral
embolism and thrombosis, carotid artery thrombosis, sinus
thrombosis, Wallenberg's syndrome, cerebral hemorrhage, epidural
hematoma, subdural hematoma, subaraxhnoid hemorrhage, cerebral
infarction, cerebral ischemia (including transient), subclavian
steal syndrome, periventricular leukomalacia, vascular headache,
cluster headache, migraine, and vertebrobasilar insufficiency.
[0539] Embolisms include, but are not limited to, air embolisms,
amniotic fluid embolisms, cholesterol embolisms, blue toe syndrome,
fat embolisms, pulmonary embolisms, and thromoboembolisms.
Thrombosis include, but are not limited to, coronary thrombosis,
hepatic vein thrombosis, retinal vein occlusion, carotid artery
thrombosis, sinus thrombosis, Wallenberg's syndrome, and
thrombophlebitis.
[0540] Ischemic disorders include, but are not limited to, cerebral
ischemia, ischemic colitis, compartment syndromes, anterior
compartment syndrome, myocardial ischemia, reperfusion injuries,
and peripheral limb ischemia. Vasculitis includes, but is not
limited to, aortitis, arteritis, Behcet's Syndrome, Churg-Strauss
Syndrome, mucocutaneous lymph node syndrome, thromboangiitis
obliterans, hypersensitivity vasculitis, Schoenlein-Henoch purpura,
allergic cutaneous vasculitis, and Wegener's granulomatosis.
[0541] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be administered using any method known in the art, including,
but not limited to, direct needle injection at the delivery site,
intravenous injection, topical administration, catheter infusion,
biolistic injectors, particle accelerators, gelfoam sponge depots,
other commercially available depot materials, osmotic pumps, oral
or suppositorial solid pharmaceutical formulations, decanting or
topical applications during surgery, aerosol delivery. Such methods
are known in the art. Methods of delivering polynucleotides are
described in more detail herein.
Respiratory Disorders
[0542] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be used to treat, prevent, diagnose, and/or prognose diseases
and/or disorders of the respiratory system.
[0543] Diseases and disorders of the respiratory system include,
but are not limited to, nasal vestibulitis, nonallergic rhinitis
(e.g., acute rhinitis, chronic rhinitis, atrophic rhinitis,
vasomotor rhinitis), nasal polyps, and sinusitis, juvenile
angiofibromas, cancer of the nose and juvenile papillomas, vocal
cord polyps, nodules (singer's nodules), contact ulcers, vocal cord
paralysis, laryngoceles, pharyngitis (e.g., viral and bacterial),
tonsillitis, tonsillar cellulitis, parapharyngeal abscess,
laryngitis, laryngoceles, and throat cancers (e.g., cancer of the
nasopharynx, tonsil cancer, larynx cancer), lung cancer (e.g.,
squamous cell carcinoma, small cell (oat cell) carcinoma, large
cell carcinoma, and adenocarcinoma), allergic disorders
(eosinophilic pneumonia, hypersensitivity pneumonitis (e.g.,
extrinsic allergic alveolitis, allergic interstitial pneumonitis,
organic dust pneumoconiosis, allergic bronchopulmonary
aspergillosis, asthma, Wegener's granulomatosis (granulomatous
vasculitis), Goodpasture's syndrome)), pneumonia (e.g., bacterial
pneumonia (e.g., Streptococcus pneumoniae (pneumoncoccal
pneumonia), Staphylococcus aureus (staphylococcal pneumonia),
Gram-negative bacterial pneumonia (caused by, e.g., Klebsiella and
Pseudomas spp.), Mycoplasma pneumoniae pneumonia, Hemophilus
influenzae pneumonia, Legionella pneumophila (Legionnaires'
disease), and Chlamydia psittaci (Psittacosis)), and viral
pneumonia (e.g., influenza, chickenpox (varicella).
[0544] Additional diseases and disorders of the respiratory system
include, but are not limited to bronchiolitis, polio
(poliomyelitis), croup, respiratory syncytial viral infection,
mumps, erythema infectiosum (fifth disease), roseola infantum,
progressive rubella panencephalitis, german measles, and subacute
sclerosing panencephalitis), fungal pneumonia (e.g.,
Histoplasmosis, Coccidioidomycosis, Blastomycosis, fungal
infections in people with severely suppressed immune systems (e.g.,
cryptococcosis, caused by Cryptococcus neoformans; aspergillosis,
caused by Aspergillus spp.; candidiasis, caused by Candida; and
mucormycosis)), Pneumocystis carinii (pneumocystis pneumonia),
atypical pneumonias (e.g., Mycoplasma and Chlamydia spp.),
opportunistic infection pneumonia, nosocomial pneumonia, chemical
pneumonitis, and aspiration pneumonia, pleural disorders (e.g.,
pleurisy, pleural effusion, and pneumothorax (e.g., simple
spontaneous pneumothorax, complicated spontaneous pneumothorax,
tension pneumothorax)), obstructive airway diseases (e.g., asthma,
chronic obstructive pulmonary disease (COPD), emphysema, chronic or
acute bronchitis), occupational lung diseases (e.g., silicosis,
black lung (coal workers' pneumoconiosis), asbestosis, berylliosis,
occupational asthsma, byssinosis, and benign pneumoconioses),
Infiltrative Lung Disease (e.g., pulmonary fibrosis (e.g.,
fibrosing alveolitis, usual interstitial pneumonia), idiopathic
pulmonary fibrosis, desquamative interstitial pneumonia, lymphoid
interstitial pneumonia, histiocytosis X (e.g., Letterer-Siwe
disease, Hand-Schuller-Christian disease, eosinophilic granuloma),
idiopathic pulmonary hemosiderosis, sarcoidosis and pulmonary
alveolar proteinosis), Acute respiratory distress syndrome (also
called, e.g., adult respiratory distress syndrome), edema,
pulmonary embolism, bronchitis (e.g., viral, bacterial),
bronchiectasis, atelectasis, lung abscess (caused by, e.g.,
Staphylococcus aureus or Legionella pneumophila), and cystic
fibrosis.
Anti-Angiogenesis Activity
[0545] The naturally occurring balance between endogenous
stimulators and inhibitors of angiogenesis is one in which
inhibitory influences predominate. Rastinejad et al., Cell
56:345-355 (1989). In those rare instances in which
neovascularization occurs under normal physiological conditions,
such as wound healing, organ regeneration, embryonic development,
and female reproductive processes, angiogenesis is stringently
regulated and spatially and temporally delimited. Under conditions
of pathological angiogenesis such as that characterizing solid
tumor growth, these regulatory controls fail. Unregulated
angiogenesis becomes pathologic and sustains progression of many
neoplastic and non-neoplastic diseases. A number of serious
diseases are dominated by abnormal neovascularization including
solid tumor growth and metastases, arthritis, some types of eye
disorders, and psoriasis. See, e.g., reviews by Moses et al.,
Biotech. 9:630-634 (1991); Folkman et al., N. Engl. J. Med.,
333:1757-1763 (1995); Auerbach et al., J. Microvasc. Res.
29:401-411 (1985); Folkman, Advances in Cancer Research, eds. Klein
and Weinhouse, Academic Press, New York, pp. 175-203 (1985); Patz,
Am. J. Opthalmol. 94:715-743 (1982); and Folkman et al., Science
221:719-725 (1983). In a number of pathological conditions, the
process of angiogenesis contributes to the disease state. For
example, significant data have accumulated which suggest that the
growth of solid tumors is dependent on angiogenesis. Folkman and
Klagsbrun, Science 235:442-447 (1987).
[0546] The present invention provides for treatment of diseases or
disorders associated with neovascularization by administration of
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention. Malignant and metastatic
conditions which can be treated with the polynucleotides and
polypeptides, or agonists or antagonists of the invention include,
but are not limited to, malignancies, solid tumors, and cancers
described herein and otherwise known in the art (for a review of
such disorders, see Fishman et al., Medicine, 2d Ed., J. B.
Lippincott Co., Philadelphia (1985)). Thus, the present invention
provides a method of treating an angiogenesis-related disease
and/or disorder, comprising administering to an individual in need
thereof a therapeutically effective amount of an albumin fusion
protein of the invention and/or polynucleotides encoding an albumin
fusion protein of the invention. For example, fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention may be utilized in a variety of
additional methods in order to therapeutically treat a cancer or
tumor. Cancers which may be treated with fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention include, but are not limited to solid tumors,
including prostate, lung, breast, ovarian, stomach, pancreas,
larynx, esophagus, testes, liver, parotid, biliary tract, colon,
rectum, cervix, uterus, endometrium, kidney, bladder, thyroid
cancer; primary tumors and metastases; melanomas; glioblastoma;
Kaposi's sarcoma; leiomyosarcoma; non-small cell lung cancer;
colorectal cancer; advanced malignancies; and blood born tumors
such as leukemias. For example, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention may be delivered topically, in order to treat cancers
such as skin cancer, head and neck tumors, breast tumors, and
Kaposi's sarcoma.
[0547] Within yet other aspects, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention may be utilized to treat superficial forms of bladder
cancer by, for example, intravesical administration. Albumin fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention may be delivered directly into the
tumor, or near the tumor site, via injection or a catheter. Of
course, as the artisan of ordinary skill will appreciate, the
appropriate mode of administration will vary according to the
cancer to be treated. Other modes of delivery are discussed
herein.
[0548] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be useful in treating other disorders, besides cancers, which
involve angiogenesis. These disorders include, but are not limited
to: benign tumors, for example hemangiomas, acoustic neuromas,
neurofibromas, trachomas, and pyogenic granulomas; artheroscleric
plaques; ocular angiogenic diseases, for example, diabetic
retinopathy, retinopathy of prematurity, macular degeneration,
corneal graft rejection, neovascular glaucoma, retrolental
fibroplasia, rubeosis, retinoblastoma, uvietis and Pterygia
(abnormal blood vessel growth) of the eye; rheumatoid arthritis;
psoriasis; delayed wound healing; endometriosis; vasculogenesis;
granulations; hypertrophic scars (keloids); nonunion fractures;
scleroderma; trachoma; vascular adhesions; myocardial angiogenesis;
coronary collaterals; cerebral collaterals; arteriovenous
malformations; ischemic limb angiogenesis; Osler-Webber Syndrome;
plaque neovascularization; telangiectasia; hemophiliac joints;
angiofibroma; fibromuscular dysplasia; wound granulation; Crohn's
disease; and atherosclerosis.
[0549] For example, within one aspect of the present invention
methods are provided for treating hypertrophic scars and keloids,
comprising the step of administering albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention to a hypertrophic scar or keloid.
[0550] Within one embodiment of the present invention fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention are directly injected into a
hypertrophic scar or keloid, in order to prevent the progression of
these lesions. This therapy is of particular value in the
prophylactic treatment of conditions which are known to result in
the development of hypertrophic scars and keloids (e.g., burns),
and is preferably initiated after the proliferative phase has had
time to progress (approximately 14 days after the initial injury),
but before hypertrophic scar or keloid development. As noted above,
the present invention also provides methods for treating
neovascular diseases of the eye, including for example, corneal
neovascularization, neovascular glaucoma, proliferative diabetic
retinopathy, retrolental fibroplasia and macular degeneration.
[0551] Moreover, Ocular disorders associated with
neovascularization which can be treated with the albumin fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention include, but are not limited to:
neovascular glaucoma, diabetic retinopathy, retinoblastoma,
retrolental fibroplasia, uveitis, retinopathy of prematurity
macular degeneration, corneal graft neovascularization, as well as
other eye inflammatory diseases, ocular tumors and diseases
associated with choroidal or iris neovascularization. See, e.g.,
reviews by Waltman et al., Am. J. Ophthal. 85:704-710 (1978) and
Gartner et al., Surv. Ophthal. 22:291-312 (1978).
[0552] Thus, within one aspect of the present invention methods are
provided for treating neovascular diseases of the eye such as
corneal neovascularization (including corneal graft
neovascularization), comprising the step of administering to a
patient a therapeutically effective amount of a compound (e.g.,
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention) to the cornea, such that
the formation of blood vessels is inhibited. Briefly, the cornea is
a tissue which normally lacks blood vessels. In certain
pathological conditions however, capillaries may extend into the
cornea from the pericorneal vascular plexus of the limbus. When the
cornea becomes vascularized, it also becomes clouded, resulting in
a decline in the patient's visual acuity. Visual loss may become
complete if the cornea completely opacitates. A wide variety of
disorders can result in corneal neovascularization, including for
example, corneal infections (e.g., trachoma, herpes simplex
keratitis, leishmaniasis and onchocerciasis), immunological
processes (e.g., graft rejection and Stevens-Johnson's syndrome),
alkali burns, trauma, inflammation (of any cause), toxic and
nutritional deficiency states, and as a complication of wearing
contact lenses.
[0553] Within particularly preferred embodiments of the invention,
may be prepared for topical administration in saline (combined with
any of the preservatives and antimicrobial agents commonly used in
ocular preparations), and administered in eyedrop form. The
solution or suspension may be prepared in its pure form and
administered several times daily. Alternatively, anti-angiogenic
compositions, prepared as described above, may also be administered
directly to the cornea. Within preferred embodiments, the
anti-angiogenic composition is prepared with a muco-adhesive
polymer which binds to cornea. Within further embodiments, the
anti-angiogenic factors or anti-angiogenic compositions may be
utilized as an adjunct to conventional steroid therapy. Topical
therapy may also be useful prophylactically in corneal lesions
which are known to have a high probability of inducing an
angiogenic response (such as chemical burns). In these instances
the treatment, likely in combination with steroids, may be
instituted immediately to help prevent subsequent
complications.
[0554] Within other embodiments, the compounds described above may
be injected directly into the corneal stroma by an ophthalmologist
under microscopic guidance. The preferred site of injection may
vary with the morphology of the individual lesion, but the goal of
the administration would be to place the composition at the
advancing front of the vasculature (i.e., interspersed between the
blood vessels and the normal cornea). In most cases this would
involve perilimbic corneal injection to "protect" the cornea from
the advancing blood vessels. This method may also be utilized
shortly after a corneal insult in order to prophylactically prevent
corneal neovascularization. In this situation the material could be
injected in the perilimbic cornea interspersed between the corneal
lesion and its undesired potential limbic blood supply. Such
methods may also be utilized in a similar fashion to prevent
capillary invasion of transplanted corneas. In a sustained-release
form injections might only be required 2-3 times per year. A
steroid could also be added to the injection solution to reduce
inflammation resulting from the injection itself.
[0555] Within another aspect of the present invention, methods are
provided for treating neovascular glaucoma, comprising the step of
administering to a patient a therapeutically effective amount of an
albumin fusion protein of the invention and/or polynucleotides
encoding an albumin fusion protein of the invention to the eye,
such that the formation of blood vessels is inhibited. In one
embodiment, the compound may be administered topically to the eye
in order to treat early forms of neovascular glaucoma. Within other
embodiments, the compound may be implanted by injection into the
region of the anterior chamber angle. Within other embodiments, the
compound may also be placed in any location such that the compound
is continuously released into the aqueous humor. Within another
aspect of the present invention, methods are provided for treating
proliferative diabetic retinopathy, comprising the step of
administering to a patient a therapeutically effective amount of an
albumin fusion protein of the invention and/or polynucleotides
encoding an albumin fusion protein of the invention to the eyes,
such that the formation of blood vessels is inhibited.
[0556] Within particularly preferred embodiments of the invention,
proliferative diabetic retinopathy may be treated by injection into
the aqueous humor or the vitreous, in order to increase the local
concentration of the polynucleotide, polypeptide, antagonist and/or
agonist in the retina. Preferably, this treatment should be
initiated prior to the acquisition of severe disease requiring
photocoagulation.
[0557] Within another aspect of the present invention, methods are
provided for treating retrolental fibroplasia, comprising the step
of administering to a patient a therapeutically effective amount of
an albumin fusion protein of the invention and/or polynucleotides
encoding an albumin fusion protein of the invention to the eye,
such that the formation of blood vessels is inhibited. The compound
may be administered topically, via intravitreous injection and/or
via intraocular implants.
[0558] Additionally, disorders which can be treated with fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention include, but are not limited to,
hemangioma, arthritis, psoriasis, angiofibroma, atherosclerotic
plaques, delayed wound healing, granulations, hemophilic joints,
hypertrophic scars, nonunion fractures, Osler-Weber syndrome,
pyogenic granuloma, scleroderma, trachoma, and vascular
adhesions.
[0559] Moreover, disorders and/or states, which can be treated,
prevented, diagnosed, and/or prognosed with the the albumin fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention of the invention include, but are
not limited to, solid tumors, blood born tumors such as leukemias,
tumor metastasis, Kaposi's sarcoma, benign tumors, for example
hemangiomas, acoustic neuromas, neurofibromas, trachomas, and
pyogenic granulomas, rheumatoid arthritis, psoriasis, ocular
angiogenic diseases, for example, diabetic retinopathy, retinopathy
of prematurity, macular degeneration, corneal graft rejection,
neovascular glaucoma, retrolental fibroplasia, rubeosis,
retinoblastoma, and uvietis, delayed wound healing, endometriosis,
vascluogenesis, granulations, hypertrophic scars (keloids),
nonunion fractures, scleroderma, trachoma, vascular adhesions,
myocardial angiogenesis, coronary collaterals, cerebral
collaterals, arteriovenous malformations, ischemic limb
angiogenesis, Osler-Webber Syndrome, plaque neovascularization,
telangiectasia, hemophiliac joints, angiofibroma fibromuscular
dysplasia, wound granulation, Crohn's disease, atherosclerosis,
birth control agent by preventing vascularization required for
embryo implantation controlling menstruation, diseases that have
angiogenesis as a pathologic consequence such as cat scratch
disease (Rochele minalia quintosa), ulcers (Helicobacter pylori),
Bartonellosis and bacillary angiomatosis.
[0560] In one aspect of the birth control method, an amount of the
compound sufficient to block embryo implantation is administered
before or after intercourse and fertilization have occurred, thus
providing an effective method of birth control, possibly a "morning
after" method. Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may also be used in controlling menstruation or administered as
either a peritoneal lavage fluid or for peritoneal implantation in
the treatment of endometriosis.
[0561] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be incorporated into surgical sutures in order to prevent
stitch granulomas.
[0562] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be utilized in a wide variety of surgical procedures. For
example, within one aspect of the present invention a compositions
(in the form of, for example, a spray or film) may be utilized to
coat or spray an area prior to removal of a tumor, in order to
isolate normal surrounding tissues from malignant tissue, and/or to
prevent the spread of disease to surrounding tissues. Within other
aspects of the present invention, compositions (e.g., in the form
of a spray) may be delivered via endoscopic procedures in order to
coat tumors, or inhibit angiogenesis in a desired locale. Within
yet other aspects of the present invention, surgical meshes which
have been coated with anti-angiogenic compositions of the present
invention may be utilized in any procedure wherein a surgical mesh
might be utilized. For example, within one embodiment of the
invention a surgical mesh laden with an anti-angiogenic composition
may be utilized during abdominal cancer resection surgery (e.g.,
subsequent to colon resection) in order to provide support to the
structure, and to release an amount of the anti-angiogenic
factor.
[0563] Within further aspects of the present invention, methods are
provided for treating tumor excision sites, comprising
administering albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
to the resection margins of a tumor subsequent to excision, such
that the local recurrence of cancer and the formation of new blood
vessels at the site is inhibited. Within one embodiment of the
invention, the anti-angiogenic compound is administered directly to
the tumor excision site (e.g., applied by swabbing, brushing or
otherwise coating the resection margins of the tumor with the
anti-angiogenic compound). Alternatively, the anti-angiogenic
compounds may be incorporated into known surgical pastes prior to
administration. Within particularly preferred embodiments of the
invention, the anti-angiogenic compounds are applied after hepatic
resections for malignancy, and after neurosurgical operations.
[0564] Within one aspect of the present invention, fusion proteins
of the invention and/or polynucleotides encoding albumin fusion
proteins of the invention may be administered to the resection
margin of a wide variety of tumors, including for example, breast,
colon, brain and hepatic tumors. For example, within one embodiment
of the invention, anti-angiogenic compounds may be administered to
the site of a neurological tumor subsequent to excision, such that
the formation of new blood vessels at the site are inhibited.
[0565] The albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may also be administered along with other anti-angiogenic factors.
Representative examples of other anti-angiogenic factors include:
Anti-Invasive Factor, retinoic acid and derivatives thereof,
paclitaxel, Suramin, Tissue Inhibitor of Metalloproteinase-1,
Tissue Inhibitor of Metalloproteinase-2, Plasminogen Activator
Inhibitor-1, Plasminogen Activator Inhibitor-2, and various forms
of the lighter "d group" transition metals.
[0566] Lighter "d group" transition metals include, for example,
vanadium, molybdenum, tungsten, titanium, niobium, and tantalum
species. Such transition metal species may form transition metal
complexes. Suitable complexes of the above-mentioned transition
metal species include oxo transition metal complexes.
[0567] Representative examples of vanadium complexes include oxo
vanadium complexes such as vanadate and vanadyl complexes. Suitable
vanadate complexes include metavanadate and orthovanadate complexes
such as, for example, ammonium metavanadate, sodium metavanadate,
and sodium orthovanadate. Suitable vanadyl complexes include, for
example, vanadyl acetylacetonate and vanadyl sulfate including
vanadyl sulfate hydrates such as vanadyl sulfate mono- and
trihydrates.
[0568] Representative examples of tungsten and molybdenum complexes
also include oxo complexes. Suitable oxo tungsten complexes include
tungstate and tungsten oxide complexes. Suitable tungstate
complexes include ammonium tungstate, calcium tungstate, sodium
tungstate dihydrate, and tungstic acid. Suitable tungsten oxides
include tungsten (IV) oxide and tungsten (VI) oxide. Suitable oxo
molybdenum complexes include molybdate, molybdenum oxide, and
molybdenyl complexes. Suitable molybdate complexes include ammonium
molybdate and its hydrates, sodium molybdate and its hydrates, and
potassium molybdate and its hydrates. Suitable molybdenum oxides
include molybdenum (VI) oxide, molybdenum (VI) oxide, and molybdic
acid. Suitable molybdenyl complexes include, for example,
molybdenyl acetylacetonate. Other suitable tungsten and molybdenum
complexes include hydroxo derivatives derived from, for example,
glycerol, tartaric acid, and sugars.
[0569] A wide variety of other anti-angiogenic factors may also be
utilized within the context of the present invention.
Representative examples include platelet factor 4; protamine
sulphate; sulphated chitin derivatives (prepared from queen crab
shells), (Murata et al., Cancer Res. 51:22-26, 1991); Sulphated
Polysaccharide Peptidoglycan Complex (SP-PG) (the function of this
compound may be enhanced by the presence of steroids such as
estrogen, and tamoxifen citrate); Staurosporine; modulators of
matrix metabolism, including for example, proline analogs,
cishydroxyproline, d,L-3,4-dehydroproline, Thiaproline,
alpha,alpha-dipyridyl, aminopropionitrile fumarate;
4-propyl-5-(4-pyridinyl)-2(3H)-oxazolone; Methotrexate;
Mitoxantrone; Heparin; Interferons; 2 Macroglobulin-serum; ChIMP-3
(Pavloff et al., J. Bio. Chem. 267:17321-17326, (1992));
Chymostatin (Tomkinson et al., Biochem J. 286:475-480, (1992));
Cyclodextrin Tetradecasulfate; Eponemycin; Camptothecin; Fumagillin
(Ingber et al., Nature 348:555-557, 1990); Gold Sodium Thiomalate
("GST"; Matsubara and Ziff, J. Clin. Invest. 79:1440-1446, (1987));
anticollagenase-serum; alpha2-antiplasmin (Holmes et al., J. Biol.
Chem. 262(4):1659-1664, (1987)); Bisantrene (National Cancer
Institute); Lobenzarit disodium
(N-(2)-carboxyphenyl-4-chloroanthronilic acid disodium or "CCA";
Takeuchi et al., Agents Actions 36:312-316, (1992)); Thalidomide;
Angostatic steroid; AGM-1470; carboxynaminolmidazole; and
metalloproteinase inhibitors such as BB94.
Diseases at the Cellular Level
[0570] Diseases associated with increased cell survival or the
inhibition of apoptosis that could be treated, prevented,
diagnosed, and/or prognosed using fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention, include cancers (such as follicular lymphomas,
carcinomas with p53 mutations, and hormone-dependent tumors,
including, but not limited to colon cancer, cardiac tumors,
pancreatic cancer, melanoma, retinoblastoma, glioblastoma, lung
cancer, intestinal cancer, testicular cancer, stomach cancer,
neuroblastoma, myxoma, myoma, lymphoma, endothelioma,
osteoblastoma, osteoclastoma, osteosarcoma, chondrosarcoma,
adenoma, breast cancer, prostate cancer, Kaposi's sarcoma and
ovarian cancer); autoimmune disorders (such as, multiple sclerosis,
Sjogren's syndrome, Hashimoto's thyroiditis, biliary cirrhosis,
Behcet's disease, Crohn's disease, polymyositis, systemic lupus
erythematosus and immune-related glomerulonephritis and rheumatoid
arthritis) and viral infections (such as herpes viruses, pox
viruses and adenoviruses), inflammation, graft v. host disease,
acute graft rejection, and chronic graft rejection.
[0571] In preferred embodiments, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention are used to inhibit growth, progression, and/or metasis
of cancers, in particular those listed above.
[0572] Additional diseases or conditions associated with increased
cell survival that could be treated or detected by fusion proteins
of the invention and/or polynucleotides encoding albumin fusion
proteins of the invention include, but are not limited to,
progression, and/or metastases of malignancies and related
disorders such as leukemia (including acute leukemias (e.g., acute
lymphocytic leukemia, acute myelocytic leukemia (including
myeloblastic, promyelocytic, myelomonocytic, monocytic, and
erythroleukemia)) and chronic leukemias (e.g., chronic myelocytic
(granulocytic) leukemia and chronic lymphocytic leukemia)),
polycythemia vera, lymphomas (e.g., Hodgkin's disease and
non-Hodgkin's disease), multiple myeloma, Waldenstrom's
macroglobulinemia, heavy chain disease, and solid tumors including,
but not limited to, sarcomas and carcinomas such as fibrosarcoma,
myxosarcoma, liposarcoma, chondrosarcoma, osteogenic sarcoma,
chordoma, angiosarcoma, endotheliosarcoma, lymphangiosarcoma,
lymphangioendotheliosarcoma, synovioma, mesothelioma, Ewing's
tumor, leiomyosarcoma, rhabdomyosarcoma, colon carcinoma,
pancreatic cancer, breast cancer, ovarian cancer, prostate cancer,
squamous cell carcinoma, basal cell carcinoma, adenocarcinoma,
sweat gland carcinoma, sebaceous gland carcinoma, papillary
carcinoma, papillary adenocarcinomas, cystadenocarcinoma, medullary
carcinoma, bronchogenic carcinoma, renal cell carcinoma, hepatoma,
bile duct carcinoma, choriocarcinoma, seminoma, embryonal
carcinoma, Wilm's tumor, cervical cancer, testicular tumor, lung
carcinoma, small cell lung carcinoma, bladder carcinoma, epithelial
carcinoma, glioma, astrocytoma, medulloblastoma, craniopharyngioma,
ependymoma, pinealoma, hemangioblastoma, acoustic neuroma,
oligodendroglioma, menangioma, melanoma, neuroblastoma, and
retinoblastoma.
[0573] Diseases associated with increased apoptosis that could be
treated, prevented, diagnosed, and/or prognesed using fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention, include, but are not limited to,
AIDS; neurodegenerative disorders (such as Alzheimer's disease,
Parkinson's disease, Amyotrophic lateral sclerosis, Retinitis
pigmentosa, Cerebellar degeneration and brain tumor or prior
associated disease); autoimmune disorders (such as, multiple
sclerosis, Sjogren's syndrome, Hashimoto's thyroiditis, biliary
cirrhosis, Behcet's disease, Crohn's disease, polymyositis,
systemic lupus erythematosus and immune-related glomerulonephritis
and rheumatoid arthritis) myelodysplastic syndromes (such as
aplastic anemia), graft v. host disease, ischemic injury (such as
that caused by myocardial infarction, stroke and reperfusion
injury), liver injury (e.g., hepatitis related liver injury,
ischemia/reperfusion injury, cholestosis (bile duct injury) and
liver cancer); toxin-induced liver disease (such as that caused by
alcohol), septic shock, cachexia and anorexia.
Wound Healing and Epithelial Cell Proliferation
[0574] In accordance with yet a further aspect of the present
invention, there is provided a process for utilizing fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention, for therapeutic purposes, for
example, to stimulate epithelial cell proliferation and basal
keratinocytes for the purpose of wound healing, and to stimulate
hair follicle production and healing of dermal wounds. Albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention, may be clinically useful
in stimulating wound healing including surgical wounds, excisional
wounds, deep wounds involving damage of the dermis and epidermis,
eye tissue wounds, dental tissue wounds, oral cavity wounds,
diabetic ulcers, dermal ulcers, cubitus ulcers, arterial ulcers,
venous stasis ulcers, burns resulting from heat exposure or
chemicals, and other abnormal wound healing conditions such as
uremia, malnutrition, vitamin deficiencies and complications
associated with systemic treatment with steroids, radiation therapy
and antineoplastic drugs and antimetabolites. Albumin fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention, could be used to promote dermal
reestablishment subsequent to dermal loss
[0575] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
could be used to increase the adherence of skin grafts to a wound
bed and to stimulate re-epithelialization from the wound bed. The
following are types of grafts that fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention, could be used to increase adherence to a wound bed:
autografts, artificial skin, allografts, autodermic graft,
autoepdermic grafts, avacular grafts, Blair-Brown grafts, bone
graft, brephoplastic grafts, cutis graft, delayed graft, dermic
graft, epidermic graft, fascia graft, full thickness graft,
heterologous graft, xenograft, homologous graft, hyperplastic
graft, lamellar graft, mesh graft, mucosal graft, Ollier-Thiersch
graft, omenpal graft, patch graft, pedicle graft, penetrating
graft, split skin graft, thick split graft. Albumin fusion proteins
of the invention and/or polynucleotides encoding albumin fusion
proteins of the invention, can be used to promote skin strength and
to improve the appearance of aged skin.
[0576] It is believed that fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
will also produce changes in hepatocyte proliferation, and
epithelial cell proliferation in the lung, breast, pancreas,
stomach, small intestine, and large intestine. Albumin fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention, could promote proliferation of
epithelial cells such as sebocytes, hair follicles, hepatocytes,
type II pneumocytes, mucin-producing goblet cells, and other
epithelial cells and their progenitors contained within the skin,
lung, liver, and gastrointestinal tract. Albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention, may promote proliferation of endothelial
cells, keratinocytes, and basal keratinocytes.
[0577] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
could also be used to reduce the side effects of gut toxicity that
result from radiation, chemotherapy treatments or viral infections.
Albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention, may have a
cytoprotective effect on the small intestine mucosa. Albumin fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention, may also stimulate healing of
mucositis (mouth ulcers) that result from chemotherapy and viral
infections.
[0578] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
could further be used in full regeneration of skin in full and
partial thickness skin defects, including burns, (i.e.,
repopulation of hair follicles, sweat glands, and sebaceous
glands), treatment of other skin defects such as psoriasis. Albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention, could be used to treat
epidermolysis bullosa, a defect in adherence of the epidermis to
the underlying dermis which results in frequent, open and painful
blisters by accelerating reepithelialization of these lesions.
Albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention, could also be
used to treat gastric and doudenal ulcers and help heal by scar
formation of the mucosal lining and regeneration of glandular
mucosa and duodenal mucosal lining more rapidly. Inflammatory bowel
diseases, such as Crohn's disease and ulcerative colitis, are
diseases which result in destruction of the mucosal surface of the
small or large intestine, respectively. Thus, fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention, could be used to promote the resurfacing
of the mucosal surface to aid more rapid healing and to prevent
progression of inflammatory bowel disease. Treatment with fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention, is expected to have a significant
effect on the production of mucus throughout the gastrointestinal
tract and could be used to protect the intestinal mucosa from
injurious substances that are ingested or following surgery.
Albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention, could be used to
treat diseases associate with the under expression.
[0579] Moreover, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
could be used to prevent and heal damage to the lungs due to
various pathological states. Albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention, which could stimulate proliferation and
differentiation and promote the repair of alveoli and brochiolar
epithelium to prevent or treat acute or chronic lung damage. For
example, emphysema, which results in the progressive loss of
aveoli, and inhalation injuries, i.e., resulting from smoke
inhalation and burns, that cause necrosis of the bronchiolar
epithelium and alveoli could be effectively treated using
polynucleotides or polypeptides, agonists or antagonists of the
present invention. Also fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
could be used to stimulate the proliferation of and differentiation
of type II pneumocytes, which may help treat or prevent disease
such as hyaline membrane diseases, such as infant respiratory
distress syndrome and bronchopulmonary displasia, in premature
infants.
[0580] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
could stimulate the proliferation and differentiation of
hepatocytes and, thus, could be used to alleviate or treat liver
diseases and pathologies such as fulminant liver failure caused by
cirrhosis, liver damage caused by viral hepatitis and toxic
substances (i.e., acetaminophen, carbon tetraholoride and other
hepatotoxins known in the art).
[0581] In addition, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
could be used treat or prevent the onset of diabetes mellitus. In
patients with newly diagnosed Types I and II diabetes, where some
islet cell function remains, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention, could be used to maintain the islet function so as to
alleviate, delay or prevent permanent manifestation of the disease.
Also, fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention, could be used as
an auxiliary in islet cell transplantation to improve or promote
islet cell function.
Neural Activity and Neurological Diseases
[0582] The albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be used for the diagnosis and/or treatment of diseases,
disorders, damage or injury of the brain and/or nervous system.
Nervous system disorders that can be treated with the compositions
of the invention (e.g., fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention),
include, but are not limited to, nervous system injuries, and
diseases or disorders which result in either a disconnection of
axons, a diminution or degeneration of neurons, or demyelination.
Nervous system lesions which may be treated in a patient (including
human and non-human mammalian patients) according to the methods of
the invention, include but are not limited to, the following
lesions of either the central (including spinal cord, brain) or
peripheral nervous systems: (1) ischemic lesions, in which a lack
of oxygen in a portion of the nervous system results in neuronal
injury or death, including cerebral infarction or ischemia, or
spinal cord infarction or ischemia; (2) traumatic lesions,
including lesions caused by physical injury or associated with
surgery, for example, lesions which sever a portion of the nervous
system, or compression injuries; (3) malignant lesions, in which a
portion of the nervous system is destroyed or injured by malignant
tissue which is either a nervous system associated malignancy or a
malignancy derived from non-nervous system tissue; (4) infectious
lesions, in which a portion of the nervous system is destroyed or
injured as a result of infection, for example, by an abscess or
associated with infection by human immunodeficiency virus, herpes
zoster, or herpes simplex virus or with Lyme disease, tuberculosis,
or syphilis; (5) degenerative lesions, in which a portion of the
nervous system is destroyed or injured as a result of a
degenerative process including but not limited to, degeneration
associated with Parkinson's disease, Alzheimer's disease,
Huntington's chorea, or amyotrophic lateral sclerosis (ALS); (6)
lesions associated with nutritional diseases or disorders, in which
a portion of the nervous system is destroyed or injured by a
nutritional disorder or disorder of metabolism including, but not
limited to, vitamin B12 deficiency, folic acid deficiency, Wernicke
disease, tobacco-alcohol amblyopia, Marchiafava-Bignami disease
(primary degeneration of the corpus callosum), and alcoholic
cerebellar degeneration; (7) neurological lesions associated with
systemic diseases including, but not limited to, diabetes (diabetic
neuropathy, Bell's palsy), systemic lupus erythematosus, carcinoma,
or sarcoidosis; (8) lesions caused by toxic substances including
alcohol, lead, or particular neurotoxins; and (9) demyelinated
lesions in which a portion of the nervous system is destroyed or
injured by a demyelinating disease including, but not limited to,
multiple sclerosis, human immunodeficiency virus-associated
myelopathy, transverse myelopathy or various etiologies,
progressive multifocal leukoencephalopathy, and central pontine
myelinolysis.
[0583] In one embodiment, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention are used to protect neural cells from the damaging
effects of hypoxia. In a further preferred embodiment, the albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention are used to protect neural
cells from the damaging effects of cerebral hypoxia. According to
this embodiment, the compositions of the invention are used to
treat or prevent neural cell injury associated with cerebral
hypoxia. In one non-exclusive aspect of this embodiment, the
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention, are used to
treat or prevent neural cell injury associated with cerebral
ischemia. In another non-exclusive aspect of this embodiment, the
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention are used to treat
or prevent neural cell injury associated with cerebral
infarction.
[0584] In another preferred embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used to treat or prevent neural cell
injury associated with a stroke. In a specific embodiment, albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention are used to treat or
prevent cerebral neural cell injury associated with a stroke.
[0585] In another preferred embodiment, albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used to treat or prevent neural cell
injury associated with a heart attack. In a specific embodiment,
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention are used to treat
or prevent cerebral neural cell injury associated with a heart
attack.
[0586] The compositions of the invention which are useful for
treating or preventing a nervous system disorder may be selected by
testing for biological activity in promoting the survival or
differentiation of neurons. For example, and not by way of
limitation, compositions of the invention which elicit any of the
following effects may be useful according to the invention: (1)
increased survival time of neurons in culture either in the
presence or absence of hypoxia or hypoxic conditions; (2) increased
sprouting of neurons in culture or in vivo; (3) increased
production of a neuron-associated molecule in culture or in vivo,
e.g., choline acetyltransferase or acetylcholinesterase with
respect to motor neurons; or (4) decreased symptoms of neuron
dysfunction in vivo. Such effects may be measured by any method
known in the art. In preferred, non-limiting embodiments, increased
survival of neurons may routinely be measured using a method set
forth herein or otherwise known in the art, such as, for example,
in Zhang et al., Proc Natl Acad Sci USA 97:3637-42 (2000) or in
Arakawa et al., J. Neurosci., 10:3507-15 (1990); increased
sprouting of neurons may be detected by methods known in the art,
such as, for example, the methods set forth in Pestronk et al.,
Exp. Neurol., 70:65-82 (1980), or Brown et al., Ann. Rev.
Neurosci., 4:17-42 (1981); increased production of
neuron-associated molecules may be measured by bioassay, enzymatic
assay, antibody binding, Northern blot assay, etc., using
techniques known in the art and depending on the molecule to be
measured; and motor neuron dysfunction may be measured by assessing
the physical manifestation of motor neuron disorder, e.g.,
weakness, motor neuron conduction velocity, or functional
disability.
[0587] In specific embodiments, motor neuron disorders that may be
treated according to the invention include, but are not limited to,
disorders such as infarction, infection, exposure to toxin, trauma,
surgical damage, degenerative disease or malignancy that may affect
motor neurons as well as other components of the nervous system, as
well as disorders that selectively affect neurons such as
amyotrophic lateral sclerosis, and including, but not limited to,
progressive spinal muscular atrophy, progressive bulbar palsy,
primary lateral sclerosis, infantile and juvenile muscular atrophy,
progressive bulbar paralysis of childhood (Fazio-Londe syndrome),
poliomyelitis and the post polio syndrome, and Hereditary
Motorsensory Neuropathy (Charcot-Marie-Tooth Disease).
[0588] Further, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may play a role in neuronal survival; synapse formation;
conductance; neural differentiation, etc. Thus, compositions of the
invention (including fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention)
may be used to diagnose and/or treat or prevent diseases or
disorders associated with these roles, including, but not limited
to, learning and/or cognition disorders. The compositions of the
invention may also be useful in the treatment or prevention of
neurodegenerative disease states and/or behavioural disorders. Such
neurodegenerative disease states and/or behavioral disorders
include, but are not limited to, Alzheimer's Disease, Parkinson's
Disease, Huntington's Disease, Tourette Syndrome, schizophrenia,
mania, dementia, paranoia, obsessive compulsive disorder, panic
disorder, learning disabilities, ALS, psychoses, autism, and
altered behaviors, including disorders in feeding, sleep patterns,
balance, and perception. In addition, compositions of the invention
may also play a role in the treatment, prevention and/or detection
of developmental disorders associated with the developing embryo,
or sexually-linked disorders.
[0589] Additionally, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
may be useful in protecting neural cells from diseases, damage,
disorders, or injury, associated with cerebrovascular disorders
including, but not limited to, carotid artery diseases (e.g.,
carotid artery thrombosis, carotid stenosis, or Moyamoya Disease),
cerebral amyloid angiopathy, cerebral aneurysm, cerebral anoxia,
cerebral arteriosclerosis, cerebral arteriovenous malformations,
cerebral artery diseases, cerebral embolism and thrombosis (e.g.,
carotid artery thrombosis, sinus thrombosis, or Wallenberg's
Syndrome), cerebral hemorrhage (e.g., epidural or subdural
hematoma, or subarachnoid hemorrhage), cerebral infarction,
cerebral ischemia (e.g., transient cerebral ischemia, Subclavian
Steal Syndrome, or vertebrobasilar insufficiency), vascular
dementia (e.g., multi-infarct), leukomalacia, periventricular, and
vascular headache (e.g., cluster headache or migraines).
[0590] In accordance with yet a further aspect of the present
invention, there is provided a process for utilizing fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention, for therapeutic purposes, for
example, to stimulate neurological cell proliferation and/or
differentiation. Therefore, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be used to treat and/or detect neurologic diseases. Moreover,
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention, can be used as a marker
or detector of a particular nervous system disease or disorder.
[0591] Examples of neurologic diseases which can be treated or
detected with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include, brain diseases, such as metabolic brain diseases which
includes phenylketonuria such as maternal phenylketonuria, pyruvate
carboxylase deficiency, pyruvate dehydrogenase complex deficiency,
Wernicke's Encephalopathy, brain edema, brain neoplasms such as
cerebellar neoplasms which include infratentorial neoplasms,
cerebral ventricle neoplasms such as choroid plexus neoplasms,
hypothalamic neoplasms, supratentorial neoplasms, canavan disease,
cerebellar diseases such as cerebellar ataxia which include
spinocerebellar degeneration such as ataxia telangiectasia,
cerebellar dyssynergia, Friederich's Ataxia, Machado-Joseph
Disease, olivopontocerebellar atrophy, cerebellar neoplasms such as
infratentorial neoplasms, diffuse cerebral sclerosis such as
encephalitis periaxialis, globoid cell leukodystrophy,
metachromatic leukodystrophy and subacute sclerosing
panencephalitis.
[0592] Additional neurologic diseases which can be treated or
detected with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include cerebrovascular disorders (such as carotid artery diseases
which include carotid artery thrombosis, carotid stenosis and
Moyamoya Disease), cerebral amyloid angiopathy, cerebral aneurysm,
cerebral anoxia, cerebral arteriosclerosis, cerebral arteriovenous
malformations, cerebral artery diseases, cerebral embolism and
thrombosis such as carotid artery thrombosis, sinus thrombosis and
Wallenberg's Syndrome, cerebral hemorrhage such as epidural
hematoma, subdural hematoma and subarachnoid hemorrhage, cerebral
infarction, cerebral ischemia such as transient cerebral ischemia,
Subclavian Steal Syndrome and vertebrobasilar insufficiency,
vascular dementia such as multi-infarct dementia, periventricular
leukomalacia, vascular headache such as cluster headache and
migraine.
[0593] Additional neurologic diseases which can be treated or
detected with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include dementia such as AIDS Dementia Complex, presenile dementia
such as Alzheimer's Disease and Creutzfeldt-Jakob Syndrome, senile
dementia such as Alzheimer's Disease and progressive supranuclear
palsy, vascular dementia such as multi-infarct dementia,
encephalitis which include encephalitis periaxialis, viral
encephalitis such as epidemic encephalitis, Japanese Encephalitis,
St. Louis Encephalitis, tick-borne encephalitis and West Nile
Fever, acute disseminated encephalomyelitis, meningoencephalitis
such as uveomeningoencephalitic syndrome, Postencephalitic
Parkinson Disease and subacute sclerosing panencephalitis,
encephalomalacia such as periventricular leukomalacia, epilepsy
such as generalized epilepsy which includes infantile spasms,
absence epilepsy, myoclonic epilepsy which includes MERRF Syndrome,
tonic-clonic epilepsy, partial epilepsy such as complex partial
epilepsy, frontal lobe epilepsy and temporal lobe epilepsy,
post-traumatic epilepsy, status epilepticus such as Epilepsia
Partialis Continua, and Hallervorden-Spatz Syndrome.
[0594] Additional neurologic diseases which can be treated or
detected with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include hydrocephalus such as Dandy-Walker Syndrome and normal
pressure hydrocephalus, hypothalamic diseases such as hypothalamic
neoplasms, cerebral malaria, narcolepsy which includes cataplexy,
bulbar poliomyelitis, cerebri pseudotumor, Rett Syndrome, Reye's
Syndrome, thalamic diseases, cerebral toxoplasmosis, intracranial
tuberculoma and Zellweger Syndrome, central nervous system
infections such as AIDS Dementia Complex, Brain Abscess, subdural
empyema, encephalomyelitis such as Equine Encephalomyelitis,
Venezuelan Equine Encephalomyelitis, Necrotizing Hemorrhagic
Encephalomyelitis, Visna, and cerebral malaria.
[0595] Additional neurologic diseases which can be treated or
detected with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include meningitis such as arachnoiditis, aseptic meningtitis such
as viral meningtitis which includes lymphocytic choriomeningitis,
Bacterial meningtitis which includes Haemophilus Meningtitis,
Listeria Meningtitis, Meningococcal Meningtitis such as
Waterhouse-Friderichsen Syndrome, Pneumococcal Meningtitis and
meningeal tuberculosis, fungal meningitis such as Cryptococcal
Meningtitis, subdural effusion, meningoencephalitis such as
uvemeningoencephalitic syndrome, myelitis such as transverse
myelitis, neurosyphilis such as tabes dorsalis, poliomyelitis which
includes bulbar poliomyelitis and postpoliomyelitis syndrome, prion
diseases (such as Creutzfeldt-Jakob Syndrome, Bovine Spongiform
Encephalopathy, Gerstmann-Straussler Syndrome, Kuru, Scrapie), and
cerebral toxoplasmosis.
[0596] Additional neurologic diseases which can be treated or
detected with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include central nervous system neoplasms such as brain neoplasms
that include cerebellar neoplasms such as infratentorial neoplasms,
cerebral ventricle neoplasms such as choroid plexus neoplasms,
hypothalamic neoplasms and supratentorial neoplasms, meningeal
neoplasms, spinal cord neoplasms which include epidural neoplasms,
demyelinating diseases such as Canavan Diseases, diffuse cerebral
sceloris which includes adrenoleukodystrophy, encephalitis
periaxialis, globoid cell leukodystrophy, diffuse cerebral
sclerosis such as metachromatic leukodystrophy, allergic
encephalomyelitis, necrotizing hemorrhagic encephalomyelitis,
progressive multifocal leukoencephalopathy, multiple sclerosis,
central pontine myelinolysis, transverse myelitis, neuromyelitis
optica, Scrapie, Swayback, Chronic Fatigue Syndrome, Visna, High
Pressure Nervous Syndrome, Meningism, spinal cord diseases such as
amyotonia congenita, amyotrophic lateral sclerosis, spinal muscular
atrophy such as Werdnig-Hoffmann Disease, spinal cord compression,
spinal cord neoplasms such as epidural neoplasms, syringomyelia,
Tabes Dorsalis, Stiff-Man Syndrome, mental retardation such as
Angelman Syndrome, Cri-du-Chat Syndrome, De Lange's Syndrome, Down
Syndrome, Gangliosidoses such as gangliosidoses G(M1), Sandhoff
Disease, Tay-Sachs Disease, Hartnup Disease, homocystinuria,
Laurence-Moon-Biedl Syndrome, Lesch-Nyhan Syndrome, Maple Syrup
Urine Disease, mucolipidosis such as fucosidosis, neuronal
ceroid-lipofuscinosis, oculocerebrorenal syndrome, phenylketonuria
such as maternal phenylketonuria, Prader-Willi Syndrome, Rett
Syndrome, Rubinstein-Taybi Syndrome, Tuberous Sclerosis, WAGR
Syndrome, nervous system abnormalities such as holoprosencephaly,
neural tube defects such as anencephaly which includes
hydrangencephaly, Arnold-Chairi Deformity, encephalocele,
meningocele, meningomyelocele, spinal dysraphism such as spina
bifida cystica and spina bifida occulta.
[0597] Additional neurologic diseases which can be treated or
detected with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include hereditary motor and sensory neuropathies which include
Charcot-Marie Disease, Hereditary optic atrophy, Refsum's Disease,
hereditary spastic paraplegia, Werdnig-Hoffmann Disease, Hereditary
Sensory and Autonomic Neuropathies such as Congenital Analgesia and
Familial Dysautonomia, Neurologic manifestations (such as agnosia
that include Gerstmann's Syndrome, Amnesia such as retrograde
amnesia, apraxia, neurogenic bladder, cataplexy, communicative
disorders such as hearing disorders that includes deafness, partial
hearing loss, loudness recruitment and tinnitus, language disorders
such as aphasia which include agraphia, anomia, broca aphasia, and
Wernicke Aphasia, Dyslexia such as Acquired Dyslexia, language
development disorders, speech disorders such as aphasia which
includes anomia, broca aphasia and Wernicke Aphasia, articulation
disorders, communicative disorders such as speech disorders which
include dysarthria, echolalia, mutism and stuttering, voice
disorders such as aphonia and hoarseness, decerebrate state,
delirium, fasciculation, hallucinations, meningism, movement
disorders such as angelman syndrome, ataxia, athetosis, chorea,
dystonia, hypokinesia, muscle hypotonia, myoclonus, tic,
torticollis and tremor, muscle hypertonia such as muscle rigidity
such as stiff-man syndrome, muscle spasticity, paralysis such as
facial paralysis which includes Herpes Zoster Oticus,
Gastroparesis, Hemiplegia, ophthalmoplegia such as diplopia,
Duane's Syndrome, Horner's Syndrome, Chronic progressive external
ophthalmoplegia such as Kearns Syndrome, Bulbar Paralysis, Tropical
Spastic Paraparesis, Paraplegia such as Brown-Sequard Syndrome,
quadriplegia, respiratory paralysis and vocal cord paralysis,
paresis, phantom limb, taste disorders such as ageusia and
dysgeusia, vision disorders such as amblyopia, blindness, color
vision defects, diplopia, hemianopsia, scotoma and subnormal
vision, sleep disorders such as hypersomnia which includes
Kleine-Levin Syndrome, insomnia, and somnambulism, spasm such as
trismus, unconsciousness such as coma, persistent vegetative state
and syncope and vertigo, neuromuscular diseases such as amyotonia
congenita, amyotrophic lateral sclerosis, Lambert-Eaton Myasthenic
Syndrome, motor neuron disease, muscular atrophy such as spinal
muscular atrophy, Charcot-Marie Disease and Werdnig-Hoffmann
Disease, Postpoliomyelitis Syndrome, Muscular Dystrophy, Myasthenia
Gravis, Myotonia Atrophica, Myotonia Confenita, Nemaline Myopathy,
Familial Periodic Paralysis, Multiplex Paramyloclonus, Tropical
Spastic Paraparesis and Stiff-Man Syndrome, peripheral nervous
system diseases such as acrodynia, amyloid neuropathies, autonomic
nervous system diseases such as Adie's Syndrome, Barre-Lieou
Syndrome, Familial Dysautonomia, Horner's Syndrome, Reflex
Sympathetic Dystrophy and Shy-Drager Syndrome, Cranial Nerve
Diseases such as Acoustic Nerve Diseases such as Acoustic Neuroma
which includes Neurofibromatosis 2, Facial Nerve Diseases such as
Facial Neuralgia, Melkersson-Rosenthal Syndrome, ocular motility
disorders which includes amblyopia, nystagmus, oculomotor nerve
paralysis, ophthalmoplegia such as Duane's Syndrome, Horner's
Syndrome, Chronic Progressive External Ophthalmoplegia which
includes Kearns Syndrome, Strabismus such as Esotropia and
Exotropia, Oculomotor Nerve Paralysis, Optic Nerve Diseases such as
Optic Atrophy which includes Hereditary Optic Atrophy, Optic Disk
Drusen, Optic Neuritis such as Neuromyelitis Optica, Papilledema,
Trigeminal Neuralgia, Vocal Cord Paralysis, Demyelinating Diseases
such as Neuromyelitis Optica and Swayback, and Diabetic
neuropathies such as diabetic foot.
[0598] Additional neurologic diseases which can be treated or
detected with fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
include nerve compression syndromes such as carpal tunnel syndrome,
tarsal tunnel syndrome, thoracic outlet syndrome such as cervical
rib syndrome, ulnar nerve compression syndrome, neuralgia such as
causalgia, cervico-brachial neuralgia, facial neuralgia and
trigeminal neuralgia, neuritis such as experimental allergic
neuritis, optic neuritis, polyneuritis, polyradiculoneuritis and
radiculities such as polyradiculitis, hereditary motor and sensory
neuropathies such as Charcot-Marie Disease, Hereditary Optic
Atrophy, Refsum's Disease, Hereditary Spastic Paraplegia and
Werdnig-Hoffmann Disease, Hereditary Sensory and Autonomic
Neuropathies which include Congenital Analgesia and Familial
Dysautonomia, POEMS Syndrome, Sciatica, Gustatory Sweating and
Tetany).
Endocrine Disorders
[0599] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
may be used to treat, prevent, diagnose, and/or prognose disorders
and/or diseases related to hormone imbalance, and/or disorders or
diseases of the endocrine system.
[0600] Hormones secreted by the glands of the endocrine system
control physical growth, sexual function, metabolism, and other
functions. Disorders may be classified in two ways: disturbances in
the production of hormones, and the inability of tissues to respond
to hormones. The etiology of these hormone imbalance or endocrine
system diseases, disorders or conditions may be genetic, somatic,
such as cancer and some autoimmune diseases, acquired (e.g., by
chemotherapy, injury or toxins), or infectious. Moreover, fusion
proteins of the invention and/or polynucleotides encoding albumin
fusion proteins of the invention can be used as a marker or
detector of a particular disease or disorder related to the
endocrine system and/or hormone imbalance.
[0601] Endocrine system and/or hormone imbalance and/or diseases
encompass disorders of uterine motility, including, but not limited
to: complications with pregnancy and labor (e.g., pre-tet in labor,
post-term pregnancy, spontaneous abortion, and slow or stopped
labor); and disorders and/or diseases of the menstrual cycle (e.g.,
dysmenorrhea and endometriosis).
[0602] Endocrine system and/or hormone imbalance disorders and/or
diseases include disorders and/or diseases of the pancreas, such
as, for example, diabetes mellitus, diabetes insipidus, congenital
pancreatic agenesis, pheochromocytoma--islet cell tumor syndrome;
disorders and/or diseases of the adrenal glands such as, for
example, Addison's Disease, corticosteroid deficiency, virilizing
disease, hirsutism, Cushing's Syndrome, hyperaldosteronism,
pheochromocytoma; disorders and/or diseases of the pituitary gland,
such as, for example, hyperpituitarism, hypopituitarism, pituitary
dwarfism, pituitary adenoma, panhypopituitarism, acromegaly,
gigantism; disorders and/or diseases of the thyroid, including but
not limited to, hyperthyroidism, hypothyroidism, Plummer's disease,
Graves' disease (toxic diffuse goiter), toxic nodular goiter,
thyroiditis (Hashimoto's thyroiditis, subacute granulomatous
thyroiditis, and silent lymphocytic thyroiditis), Pendred's
syndrome, myxedema, cretinism, thyrotoxicosis, thyroid hormone
coupling defect, thymic aplasia, Hurthle cell tumours of the
thyroid, thyroid cancer, thyroid carcinoma, Medullary thyroid
carcinoma; disorders and/or diseases of the parathyroid, such as,
for example, hyperparathyroidism, hypoparathyroidism; disorders
and/or diseases of the hypothalamus.
[0603] In addition, endocrine system and/or hormone imbalance
disorders and/or diseases may also include disorders and/or
diseases of the testes or ovaries, including cancer. Other
disorders and/or diseases of the testes or ovaries further include,
for example, ovarian cancer, polycystic ovary syndrome,
Klinefelter's syndrome, vanishing testes syndrome (bilateral
anorchia), congenital absence of Leydig's cells, cryptorchidism,
Noonan's syndrome, myotonic dystrophy, capillary haemangioma of the
testis (benign), neoplasias of the testis and neo-testis.
[0604] Moreover, endocrine system and/or hormone imbalance
disorders and/or diseases may also include disorders and/or
diseases such as, for example, polyglandular deficiency syndromes,
pheochromocytoma, neuroblastoma, multiple Endocrine neoplasia, and
disorders and/or cancers of endocrine tissues.
[0605] In another embodiment, albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention, may be used to diagnose, prognose, prevent,
and/or treat endocrine diseases and/or disorders associated with
the tissue(s) in which the Therapeutic protein corresponding to the
Therapeutic protein portion of the albumin protein of the invention
is expressed,
Reproductive System Disorders
[0606] The albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be used for the diagnosis, treatment, or prevention of diseases
and/or disorders of the reproductive system. Reproductive system
disorders that can be treated by the compositions of the invention,
include, but are not limited to, reproductive system injuries,
infections, neoplastic disorders, congenital defects, and diseases
or disorders which result in infertility, complications with
pregnancy, labor, or parturition, and postpartum difficulties.
[0607] Reproductive system disorders and/or diseases include
diseases and/or disorders of the testes, including testicular
atrophy, testicular feminization, cryptorchism (unilateral and
bilateral), anorchia, ectopic testis, epididymitis and orchitis
(typically resulting from infections such as, for example,
gonorrhea, mumps, tuberculosis, and syphilis), testicular torsion,
vasitis nodosa, germ cell tumors (e.g., seminomas, embryonal cell
carcinomas, teratocarcinomas, choriocarcinomas, yolk sac tumors,
and teratomas), stromal tumors (e.g., Leydig cell tumors),
hydrocele, hematocele, varicocele, spermatocele, inguinal hernia,
and disorders of sperm production (e.g., immotile cilia syndrome,
aspermia, asthenozoospermia, azoospermia, oligospermia, and
teratozoospermia).
[0608] Reproductive system disorders also include disorders of the
prostate gland, such as acute non-bacterial prostatitis, chronic
non-bacterial prostatitis, acute bacterial prostatitis, chronic
bacterial prostatitis, prostatodystonia, prostatosis, granulomatous
prostatitis, malacoplakia, benign prostatic hypertrophy or
hyperplasia, and prostate neoplastic disorders, including
adenocarcinomas, transitional cell carcinomas, ductal carcinomas,
and squamous cell carcinomas.
[0609] Additionally, the compositions of the invention may be
useful in the diagnosis, treatment, and/or prevention of disorders
or diseases of the penis and urethra, including inflammatory
disorders, such as balanoposthitis, balanitis xerotica obliterans,
phimosis, paraphimosis, syphilis, herpes simplex virus, gonorrhea,
non-gonococcal urethritis, chlamydia, mycoplasma, trichomonas, HIV,
AIDS, Reiter's syndrome, condyloma acuminatum, condyloma latum, and
pearly penile papules; urethral abnormalities, such as hypospadias,
epispadias, and phimosis; premalignant lesions, including
Erythroplasia of Queyrat, Bowen's disease, Bowenoid paplosis, giant
condyloma of Buscke-Lowenstein, and varrucous carcinoma; penile
cancers, including squamous cell carcinomas, carcinoma in situ,
verrucous carcinoma, and disseminated penile carcinoma; urethral
neoplastic disorders, including penile urethral carcinoma,
bulbomembranous urethral carcinoma, and prostatic urethral
carcinoma; and erectile disorders, such as priapism, Peyronie's
disease, erectile dysfunction, and impotence.
[0610] Moreover, diseases and/or disorders of the vas deferens
include vasculititis and CBAVD (congenital bilateral absence of the
vas deferens); additionally, the albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be used in the diagnosis, treatment, and/or
prevention of diseases and/or disorders of the seminal vesicles,
including hydatid disease, congenital chloride diarrhea, and
polycystic kidney disease.
[0611] Other disorders and/or diseases of the male reproductive
system include, for example, Klinefelter's syndrome, Young's
syndrome, premature ejaculation, diabetes mellitus, cystic
fibrosis, Kartagener's syndrome, high fever, multiple sclerosis,
and gynecomastia.
[0612] Further, the polynucleotides, fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may be used in the diagnosis, treatment, and/or
prevention of diseases and/or disorders of the vagina and vulva,
including bacterial vaginosis, candida vaginitis, herpes simplex
virus, chancroid, granuloma inguinale, lymphogranuloma venereum,
scabies, human papillomavirus, vaginal trauma, vulvar trauma,
adenosis, chlamydia vaginitis, gonorrhea, trichomonas vaginitis,
condyloma acuminatum, syphilis, molluscum contagiosum, atrophic
vaginitis, Paget's disease, lichen sclerosus, lichen planus,
vulvodynia, toxic shock syndrome, vaginismus, vulvovaginitis,
vulvar vestibulitis, and neoplastic disorders, such as squamous
cell hyperplasia, clear cell carcinoma, basal cell carcinoma,
melanomas, cancer of Bartholin's gland, and vulvar intraepithelial
neoplasia.
[0613] Disorders and/or diseases of the uterus include
dysmenorrhea, retroverted uterus, endometriosis, fibroids,
adenomyosis, anovulatory bleeding, amenorrhea, Cushing's syndrome,
hydatidiform moles, Asherman's syndrome, premature menopause,
precocious puberty, uterine polyps, dysfunctional uterine bleeding
(e.g., due to aberrant hormonal signals), and neoplastic disorders,
such as adenocarcinomas, keiomyosarcomas, and sarcomas.
Additionally, the albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may be useful as a marker or detector of, as well as in the
diagnosis, treatment, and/or prevention of congenital uterine
abnormalities, such as bicornuate uterus, septate uterus, simple
unicornuate uterus, unicornuate uterus with a noncavitary
rudimentary horn, unicornuate uterus with a non-communicating
cavitary rudimentary horn, unicornuate uterus with a communicating
cavitary horn, arcuate uterus, uterine didelfus, and T-shaped
uterus.
[0614] Ovarian diseases and/or disorders include anovulation,
polycystic ovary syndrome (Stein-Leventhal syndrome), ovarian
cysts, ovarian hypofunction, ovarian insensitivity to
gonadotropins, ovarian overproduction of androgens, right ovarian
vein syndrome, amenorrhea, hirutism, and ovarian cancer (including,
but not limited to, primary and secondary cancerous growth,
Sertoli-Leydig tumors, endometriod carcinoma of the ovary, ovarian
papillary serous adenocarcinoma, ovarian mucinous adenocarcinoma,
and Ovarian Krukenberg tumors).
[0615] Cervical diseases and/or disorders include cervicitis,
chronic cervicitis, mucopurulent cervicitis, cervical dysplasia,
cervical polyps, Nabothian cysts, cervical erosion, cervical
incompetence, and cervical neoplasms (including, for example,
cervical carcinoma, squamous metaplasia, squamous cell carcinoma,
adenosquamous cell neoplasia, and columnar cell neoplasia).
[0616] Additionally, diseases and/or disorders of the reproductive
system include disorders and/or diseases of pregnancy, including
miscarriage and stillbirth, such as early abortion, late abortion,
spontaneous abortion, induced abortion, therapeutic abortion,
threatened abortion, missed abortion, incomplete abortion, complete
abortion, habitual abortion, missed abortion, and septic abortion;
ectopic pregnancy, anemia, Rh incompatibility, vaginal bleeding
during pregnancy, gestational diabetes, intrauterine growth
retardation, polyhydramnios, HELLP syndrome, abruptio placentae,
placenta previa, hyperemesis, preeclampsia, eclampsia, herpes
gestationis, and urticaria of pregnancy. Additionally, the albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention may be used in the
diagnosis, treatment, and/or prevention of diseases that can
complicate pregnancy, including heart disease, heart failure,
rheumatic heart disease, congenital heart disease, mitral valve
prolapse, high blood pressure, anemia, kidney disease, infectious
disease (e.g., rubella, cytomegalovirus, toxoplasmosis, infectious
hepatitis, chlamydia, HIV, AIDS, and genital herpes), diabetes
mellitus, Graves' disease, thyroiditis, hypothyroidism, Hashimoto's
thyroiditis, chronic active hepatitis, cirrhosis of the liver,
primary biliary cirrhosis, asthma, systemic lupus eryematosis,
rheumatoid arthritis, myasthenia gravis, idiopathic
thrombocytopenic purpura, appendicitis, ovarian cysts, gallbladder
disorders,and obstruction of the intestine.
[0617] Complications associated with labor and parturition include
premature rupture of the membranes, pre-term labor, post-term
pregnancy, postmaturity, labor that progresses too slowly, fetal
distress (e.g., abnormal heart rate (fetal or maternal), breathing
problems, and abnormal fetal position), shoulder dystocia,
prolapsed umbilical cord, amniotic fluid embolism, and aberrant
uterine bleeding.
[0618] Further, diseases and/or disorders of the postdelivery
period, including endometritis, myometritis, parametritis,
peritonitis, pelvic thrombophlebitis, pulmonary embolism,
endotoxemia, pyelonephritis, saphenous thrombophlebitis,
mastitis,cystitis, postpartum hemorrhage, and inverted uterus.
[0619] Other disorders and/or diseases of the female reproductive
system that may be diagnosed, treated, and/or prevented by the
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention include, for
example, Turner's syndrome, pseudohermaphroditism, premenstrual
syndrome, pelvic inflammatory disease, pelvic congestion (vascular
engorgement), frigidity, anorgasmia, dyspareunia, ruptured
fallopian tube, and Mittelschmerz.
Infectious Disease
[0620] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
can be used to treat or detect infectious agents. For example, by
increasing the immune response, particularly increasing the
proliferation and differentiation of B and/or T cells, infectious
diseases may be treated. The immune response may be increased by
either enhancing an existing immune response, or by initiating a
new immune response. Alternatively, fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may also directly inhibit the infectious agent,
without necessarily eliciting an immune response.
[0621] Viruses are one example of an infectious agent that can
cause disease or symptoms that can be treated or detected by
albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention. Examples of
viruses, include, but are not limited to Examples of viruses,
include, but are not limited to the following DNA and RNA viruses
and viral families: Arbovirus, Adenoviridae, Arenaviridae,
Arterivirus, Birnaviridae, Bunyaviridae, Caliciviridae,
Circoviridae, Coronaviridae, Dengue, EBV, HIV, Flaviviridae,
Hepadnaviridae (Hepatitis), Herpesviridae (such as,
Cytomegalovirus, Herpes Simplex, Herpes Zoster), Mononegavirus
(e.g., Paramyxoviridae, Morbillivirus, Rhabdoviridae),
Orthomyxoviridae (e.g., Influenza A, Influenza B, and
parainfluenza), Papiloma virus, Papovaviridae, Parvoviridae,
Picornaviridae, Poxviridae (such as Smallpox or Vaccinia),
Reoviridae (e.g., Rotavirus), Retroviridae (HTLV-I, HTLV-II,
Lentivirus), and Togaviridae (e.g., Rubivirus). Viruses falling
within these families can cause a variety of diseases or symptoms,
including, but not limited to: arthritis, bronchiollitis,
respiratory syncytial virus, encephalitis, eye infections (e.g.,
conjunctivitis, keratitis), chronic fatigue syndrome, hepatitis (A,
B, C, E, Chronic Active, Delta), Japanese B encephalitis, Junin,
Chikungunya, Rift Valley fever, yellow fever, meningitis,
opportunistic infections (e.g., AIDS), pneumonia, Burkitt's
Lymphoma, chickenpox, hemorrhagic fever, Measles, Mumps,
Parainfluenza, Rabies, the common cold, Polio, leukemia, Rubella,
sexually transmitted diseases, skin diseases (e.g., Kaposi's,
warts), and viremia. Albumin fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins of the
invention, can be used to treat or detect any of these symptoms or
diseases. In specific embodiments, fusion proteins of the invention
and/or polynucleotides encoding albumin fusion proteins, of the
invention are used to treat: meningitis, Dengue, EBV, and/or
hepatitis (e.g., hepatitis B). In an additional specific embodiment
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention are used to treat patients
nonresponsive to one or more other commercially available hepatitis
vaccines. In a further specific embodiment fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention are used to treat AIDS.
[0622] Similarly, bacterial and fungal agents that can cause
disease or symptoms and that can be treated or detected by albumin
fusion proteins of the invention and/or polynucleotides encoding
albumin fusion proteins of the invention include, but not limited
to, the following Gram-Negative and Gram-positive bacteria,
bacterial families, and fungi: Actinomyces (e.g., Norcardia),
Acinetobacter, Cryptococcus neoformans, Aspergillus, Bacillaceae
(e.g., Bacillus anthrasis), Bacteroides (e.g., Bacteroides
fragilis), Blastomycosis, Bordetella, Borrelia (e.g., Borrelia
burgdorferi), Brucella, Candidia, Campylobacter, Chlamydia,
Clostridium (e.g., Clostridium botulinum, Clostridium dificile,
Clostridium perfringens, Clostridium tetani), Coccidioides,
Corynebacterium (e.g., Corynebacterium diptheriae), Cryptococcus,
Dermatocycoses, E. coli (e.g., Enterotoxigenic E. coli and
Enterohemorrhagic E. coli), Enterobacter (e.g. Enterobacter
aerogenes), Enterobacteriaceae (Klebsiella, Salmonella (e.g.,
Salmonella typhi, Salmonella enteritidis, Salmonella typhi),
Serratia, Yersinia, Shigella), Erysipelothrix, Haemophilus (e.g.,
Haemophilus influenza type B), Helicobacter, Legionella (e.g.,
Legionella pneumophila), Leptospira, Listeria (e.g., Listeria
monocytogenes), Mycoplasma, Mycobacterium (e.g., Mycobacterium
leprae and Mycobacterium tuberculosis), Vibrio (e.g., Vibrio
cholerae), Neisseriaceae (e.g., Neisseria gonorrhea, Neisseria
meningitidis), Pasteurellacea, Proteus, Pseudomonas (e.g.,
Pseudomonas aeruginosa), Rickettsiaceae, Spirochetes (e.g.,
Treponema spp., Leptospira spp., Borrelia spp.), Shigella spp.,
Staphylococcus (e.g., Staphylococcus aureus), Meningiococcus,
Pneumococcus and Streptococcus (e.g., Streptococcus pneumoniae and
Groups A, B, and C Streptococci), and Ureaplasmas. These bacterial,
parasitic, and fungal families can cause diseases or symptoms,
including, but not limited to: antibiotic-resistant infections,
bacteremia, endocarditis, septicemia, eye infections (e.g.,
conjunctivitis), uveitis, tuberculosis, gingivitis, bacterial
diarrhea, opportunistic infections (e.g., AIDS related infections),
paronychia, prosthesis-related infections, dental caries, Reiter's
Disease, respiratory tract infections, such as Whooping Cough or
Empyema, sepsis, Lyme Disease, Cat-Scratch Disease, dysentery,
paratyphoid fever, food poisoning, Legionella disease, chronic and
acute inflammation, erythema, yeast infections, typhoid, pneumonia,
gonorrhea, meningitis (e.g., mengitis types A and B), chlamydia,
syphillis, diphtheria, leprosy, brucellosis, peptic ulcers,
anthrax, spontaneous abortions, birth defects, pneumonia, lung
infections, ear infections, deafness, blindness, lethargy, malaise,
vomiting, chronic diarrhea, Crohn's disease, colitis, vaginosis,
sterility, pelvic inflammatory diseases, candidiasis,
paratuberculosis, tuberculosis, lupus, botulism, gangrene, tetanus,
impetigo, Rheumatic Fever, Scarlet Fever, sexually transmitted
diseases, skin diseases (e.g., cellulitis, dermatocycoses),
toxemia, urinary tract infections, wound infections, noscomial
infections. Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
can be used to treat or detect any of these symptoms or diseases.
In specific embodiments, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
are used to treat: tetanus, diptheria, botulism, and/or meningitis
type B.
[0623] Moreover, parasitic agents causing disease or symptoms that
can be treated, prevented, and/or diagnosed by fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention include, but not limited to, the
following families or class: Amebiasis, Babesiosis, Coccidiosis,
Cryptosporidiosis, Dientamoebiasis, Dourine, Ectoparasitic,
Giardias, Helminthiasis, Leishmaniasis, Schistisoma, Theileriasis,
Toxoplasmosis, Trypanosomiasis, and Trichomonas and Sporozoans
(e.g., Plasmodium virax, Plasmodium falciparium, Plasmodium
malariae and Plasmodium ovale). These parasites can cause a variety
of diseases or symptoms, including, but not limited to: Scabies,
Trombiculiasis, eye infections, intestinal disease (e.g.,
dysentery, giardiasis), liver disease, lung disease, opportunistic
infections (e.g., AIDS related), malaria, pregnancy complications,
and toxoplasmosis. Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
can be used to treat, prevent, and/or diagnose any of these
symptoms or diseases. In specific embodiments, fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention are used to treat, prevent, and/or
diagnose malaria.
[0624] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
could either be by administering an effective amount of an albumin
fusion protein of the invnetion to the patient, or by removing
cells from the patient, supplying the cells with a polynucleotide
of the present invention, and returning the engineered cells to the
patient (ex vivo therapy). Moreover, the albumin fusion proteins of
the invention and/or polynucleotides encoding albumin fusion
proteins of the invention can be used as an antigen in a vaccine to
raise an immune response against infectious disease.
Regeneration
[0625] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
can be used to differentiate, proliferate, and attract cells,
leading to the regeneration of tissues. (See, Science 276:59-87
(1997)). The regeneration of tissues could be used to repair,
replace, or protect tissue damaged by congenital defects, trauma
(wounds, burns, incisions, or ulcers), age, disease (e.g.
osteoporosis, osteocarthritis, periodontal disease, liver failure),
surgery, including cosmetic plastic surgery, fibrosis, reperfusion
injury, or systemic cytokine damage.
[0626] Tissues that could be regenerated using the present
invention include organs (e.g., pancreas, liver, intestine, kidney,
skin, endothelium), muscle (smooth, skeletal or cardiac),
vasculature (including vascular and lymphatics), nervous,
hematopoietic, and skeletal (bone, cartilage, tendon, and ligament)
tissue. Preferably, regeneration occurs without or decreased
scarring. Regeneration also may include angiogenesis.
[0627] Moreover, fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
may increase regeneration of tissues difficult to heal. For
example, increased tendon/ligament regeneration would quicken
recovery time after damage. Albumin fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention could also be used prophylactically in an effort
to avoid damage. Specific diseases that could be treated include of
tendinitis, carpal tunnel syndrome, and other tendon or ligament
defects. A further example of tissue regeneration of non-healing
wounds includes pressure ulcers, ulcers associated with vascular
insufficiency, surgical, and traumatic wounds.
[0628] Similarly, nerve and brain tissue could also be regenerated
by using fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention, to proliferate
and differentiate nerve cells. Diseases that could be treated using
this method include central and peripheral nervous system diseases,
neuropathies, or mechanical and traumatic disorders (e.g., spinal
cord disorders, head trauma, cerebrovascular disease, and stoke).
Specifically, diseases associated with peripheral nerve injuries,
peripheral neuropathy (e.g., resulting from chemotherapy or other
medical therapies), localized neuropathies, and central nervous
system diseases (e.g., Alzheimer's disease, Parkinson's disease,
Huntington's disease, amyotrophic lateral sclerosis, and Shy-Drager
syndrome), could all be treated using the albumin fusion proteins
of the invention and/or polynucleotides encoding albumin fusion
proteins of the invention.
Gastrointestinal Disorders
[0629] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention,
may be used to treat, prevent, diagnose, and/or prognose
gastrointestinal disorders, including inflammatory diseases and/or
conditions, infections, cancers (e.g., intestinal neoplasms
(carcinoid tumor of the small intestine, non-Hodgkin's lymphoma of
the small intestine, small bowl lymphoma)), and ulcers, such as
peptic ulcers.
[0630] Gastrointestinal disorders include dysphagia, odynophagia,
inflammation of the esophagus, peptic esophagitis, gastric reflux,
submucosal fibrosis and stricturing, Mallory-Weiss lesions,
leiomyomas, lipomas, epidermal cancers, adeoncarcinomas, gastric
retention disorders, gastroenteritis, gastric atrophy,
gastric/stomach cancers, polyps of the stomach, autoimmune
disorders such as pernicious anemia, pyloric stenosis, gastritis
(bacterial, viral, eosinophilic, stress-induced, chronic erosive,
atrophic, plasma cell, and Menetrier's), and peritoneal diseases
(e.g., chyloperioneum, hemoperitoneum, mesenteric cyst, mesenteric
lymphadenitis, mesenteric vascular occlusion, panniculitis,
neoplasms, peritonitis, pneumoperitoneum, bubphrenic abscess,).
[0631] Gastrointestinal disorders also include disorders associated
with the small intestine, such as malabsorption syndromes,
distension, irritable bowel syndrome, sugar intolerance, celiac
disease, duodenal ulcers, duodenitis, tropical sprue, Whipple's
disease, intestinal lymphangiectasia, Crohn's disease,
appendicitis, obstructions of the ileum, Meckel's diverticulum,
multiple diverticula, failure of complete rotation of the small and
large intestine, lymphoma, and bacterial and parasitic diseases
(such as Traveler's diarrhea, typhoid and paratyphoid, cholera,
infection by Roundworms (Ascariasis lumbricoides), Hookworms
(Ancylostoma duodenale), Threadworms (Enterobius vermicularis),
Tapeworms (Taenia saginata, Echinococcus granulosus,
Diphyllobothrium spp., and T. solium).
[0632] Liver diseases and/or disorders include intrahepatic
cholestasis (alagille syndrome, biliary liver cirrhosis), fatty
liver (alcoholic fatty liver, reye syndrome), hepatic vein
thrombosis, hepatolentricular degeneration, hepatomegaly,
hepatopulmonary syndrome, hepatorenal syndrome, portal hypertension
(esophageal and gastric varices), liver abscess (amebic liver
abscess), liver cirrhosis (alcoholic, biliary and experimental),
alcoholic liver diseases (fatty liver, hepatitis, cirrhosis),
parasitic (hepatic echinococcosis, fascioliasis, amebic liver
abscess), jaundice (hemolytic, hepatocellular, and cholestatic),
cholestasis, portal hypertension, liver enlargement, ascites,
hepatitis (alcoholic hepatitis, animal hepatitis, chronic hepatitis
(autoimmune, hepatitis B, hepatitis C, hepatitis D, drug induced),
toxic hepatitis, viral human hepatitis (hepatitis A, hepatitis B,
hepatitis C, hepatitis D, hepatitis E), Wilson's disease,
granulomatous hepatitis, secondary biliary cirrhosis, hepatic
encephalopathy, portal hypertension, varices, hepatic
encephalopathy, primary biliary cirrhosis, primary sclerosing
cholangitis, hepatocellular adenoma, hemangiomas, bile stones,
liver failure (hepatic encephalopathy, acute liver failure), and
liver neoplasms (angiomyolipoma, calcified liver metastases, cystic
liver metastases, epithelial tumors, fibrolamellar hepatocarcinoma,
focal nodular hyperplasia, hepatic adenoma, hepatobiliary
cystadenoma, hepatoblastoma, hepatocellular carcinoma, hepatoma,
liver cancer, liver hemangioendothelioma, mesenchymal hamartoma,
mesenchymal tumors of liver, nodular regenerative hyperplasia,
benign liver tumors (Hepatic cysts [Simple cysts, Polycystic liver
disease, Hepatobiliary cystadenoma, Choledochal cyst], Mesenchymal
tumors [Mesenchymal hamartoma, Infantile hemangioendothelioma,
Hemangioma, Peliosis hepatis, Lipomas, Inflammatory pseudotumor,
Miscellaneous], Epithelial tumors [Bile duct epithelium (Bile duct
hamartoma, Bile duct adenoma), Hepatocyte (Adenoma, Focal nodular
hyperplasia, Nodular regenerative hyperplasia)], malignant liver
tumors [hepatocellular, hepatoblastoma, hepatocellular carcinoma,
cholangiocellular, cholangiocarcinoma, cystadenocarcinoma, tumors
of blood vessels, angiosarcoma, Karposi's sarcoma,
hemangioendothelioma, other tumors, embryonal sarcoma,
fibrosarcoma, leiomyosarcoma, rhabdomyosarcoma, carcinosarcoma,
teratoma, carcinoid, squamous carcinoma, primary lymphoma]),
peliosis hepatis, erythrohepatic porphyria, hepatic porphyria
(acute intermittent porphyria, porphyria cutanea tarda), Zellweger
syndrome).
[0633] Pancreatic diseases and/or disorders include acute
pancreatitis, chronic pancreatitis (acute necrotizing pancreatitis,
alcoholic pancreatitis), neoplasms (adenocarcinoma of the pancreas,
cystadenocarcinoma, insulinoma, gastrinoma, and glucagonoma, cystic
neoplasms, islet-cell tumors, pancreoblastoma), and other
pancreatic diseases (e.g., cystic fibrosis, cyst (pancreatic
pseudocyst, pancreatic fistula, insufficiency)).
[0634] Gallbladder diseases include gallstones (cholelithiasis and
choledocholithiasis), postcholecystectomy syndrome, diverticulosis
of the gallbladder, acute cholecystitis, chronic cholecystitis,
bile duct tumors, and mucocele.
[0635] Diseases and/or disorders of the large intestine include
antibiotic-associated colitis, diverticulitis, ulcerative colitis,
acquired megacolon, abscesses, fungal and bacterial infections,
anorectal disorders (e.g., fissures, hemorrhoids), colonic diseases
(colitis, colonic neoplasms [colon cancer, adenomatous colon polyps
(e.g., villous adenoma), colon carcinoma, colorectal cancer],
colonic diverticulitis, colonic diverticulosis, megacolon
[Hirschsprung disease, toxic megacolon]; sigmoid diseases
[proctocolitis, sigmoin neoplasms]), constipation, Crohn's disease,
diarrhea (infantile diarrhea, dysentery), duodenal diseases
(duodenal neoplasms, duodenal obstruction, duodenal ulcer,
duodenitis), enteritis (enterocolitis), HIV enteropathy, ileal
diseases (ileal neoplasms, ileitis), immunoproliferative small
intestinal disease, inflammatory bowel disease (ulcerative colitis,
Crohn's disease), intestinal atresia, parasitic diseases
(anisakiasis, balantidiasis, blastocystis infections,
cryptosporidiosis, dientamoebiasis, amebic dysentery, giardiasis),
intestinal fistula (rectal fistula), intestinal neoplasms (cecal
neoplasms, colonic neoplasms, duodenal neoplasms, ileal neoplasms,
intestinal polyps, jejunal neoplasms, rectal neoplasms), intestinal
obstruction (afferent loop syndrome, duodenal obstruction, impacted
feces, intestinal pseudo-obstruction [cecal volvulus],
intussusception), intestinal perforation, intestinal polyps
(colonic polyps, gardner syndrome, peutz-jeghers syndrome), jejunal
diseases (jejunal neoplasms), malabsorption syndromes (blind loop
syndrome, celiac disease, lactose intolerance, short bowl syndrome,
tropical sprue, whipple's disease), mesenteric vascular occlusion,
pneumatosis cystoides intestinalis, protein-losing enteropathies
(intestinal lymphagiectasis), rectal diseases (anus diseases, fecal
incontinence, hemorrhoids, proctitis, rectal fistula, rectal
prolapse, rectocele), peptic ulcer (duodenal ulcer, peptic
esophagitis, hemorrhage, perforation, stomach ulcer,
Zollinger-Ellison syndrome), postgastrectomy syndromes (dumping
syndrome), stomach diseases (e.g., achlorhydria, duodenogastric
reflux (bile reflux), gastric antral vascular ectasia, gastric
fistula, gastric outlet obstruction, gastritis (atrophic or
hypertrophic), gastroparesis, stomach dilatation, stomach
diverticulum, stomach neoplasms (gastric cancer, gastric polyps,
gastric adenocarcinoma, hyperplastic gastric polyp), stomach
rupture, stomach ulcer, stomach volvulus), tuberculosis,
visceroptosis, vomiting (e.g., hematemesis, hyperemesis gravidarum,
postoperative nausea and vomiting) and hemorrhagic colitis.
[0636] Further diseases and/or disorders of the gastrointestinal
system include biliary tract diseases, such as, gastroschisis,
fistula (e.g., biliary fistula, esophageal fistula, gastric
fistula, intestinal fistula, pancreatic fistula), neoplasms (e.g.,
biliary tract neoplasms, esophageal neoplasms, such as
adenocarcinoma of the esophagus, esophageal squamous cell
carcinoma, gastrointestinal neoplasms, pancreatic neoplasms, such
as adenocarcinoma of the pancreas, mucinous cystic neoplasm of the
pancreas, pancreatic cystic neoplasms, pancreatoblastoma, and
peritoneal neoplasms), esophageal disease (e.g., bullous diseases,
candidiasis, glycogenic acanthosis, ulceration, barrett esophagus
varices, atresia, cyst, diverticulum (e.g., Zenker's diverticulum),
fistula (e.g., tracheoesophageal fistula), motility disorders
(e.g., CREST syndrome, deglutition disorders, achalasia, spasm,
gastroesophageal reflux), neoplasms, perforation (e.g., Boerhaave
syndrome, Mallory-Weiss syndrome), stenosis, esophagitis,
diaphragmatic hernia (e.g., hiatal hernia); gastrointestinal
diseases, such as, gastroenteritis (e.g., cholera morbus, norwalk
virus infection), hemorrhage (e.g., hematemesis, melena, peptic
ulcer hemorrhage), stomach neoplasms (gastric cancer, gastric
polyps, gastric adenocarcinoma, stomach cancer)), hernia (e.g.,
congenital diaphragmatic hernia, femoral hernia, inguinal hernia,
obturator hernia, umbilical hernia, ventral hernia), and intestinal
diseases (e.g., cecal diseases (appendicitis, cecal
neoplasms)).
Chemotaxis
[0637] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may have chemotaxis activity. A chemotaxic molecule attracts or
mobilizes cells (e.g., monocytes, fibroblasts, neutrophils,
T-cells, mast cells, eosinophils, epithelial and/or endothelial
cells) to a particular site in the body, such as inflammation,
infection, or site of hyperproliferation. The mobilized cells can
then fight off and/or heal the particular trauma or
abnormality.
[0638] Albumin fusion proteins of the invention and/or
polynucleotides encoding albumin fusion proteins of the invention
may increase chemotaxic activity of particular cells. These
chemotactic molecules can then be used to treat inflammation,
infection, hyperproliferative disorders, or any immune system
disorder by increasing the number of cells targeted to a particular
location in the body. For example, chemotaxic molecules can be used
to treat wounds and other trauma to tissues by attracting immune
cells to the injured location. Chemotactic molecules of the present
invention can also attract fibroblasts, which can be used to treat
wounds.
[0639] It is also contemplated that fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention may inhibit chemotactic activity. These molecules
could also be used to treat disorders. Thus, fusion proteins of the
invention and/or polynucleotides encoding albumin fusion proteins
of the invention could be used as an inhibitor of chemotaxis.
Binding Activity
[0640] Albumin fusion proteins of the invention may be used to
screen for molecules that bind to the Therapeutic protein portion
of the fusion protein or for molecules to which the Therapeutic
protein portion of the fusion protein binds. The binding of the
fusion protein and the molecule may activate (agonist), increase,
inhibit (antagonist), or decrease activity of the fusion protein or
the molecule bound. Examples of such molecules include antibodies,
oligonucleotides, proteins (e.g., receptors), or small
molecules.
[0641] Preferably, the molecule is closely related to the natural
ligand of the Therapeutic protein portion of the fusion protein of
the invention, e.g., a fragment of the ligand, or a natural
substrate, a ligand, a structural or functional mimetic. (See,
Coligan et al., Current Protocols in Immunology 1(2):Chapter 5
(1991)). Similarly, the molecule can be closely related to the
natural receptor to which the Therapeutic protein portion of an
albumin fusion protein of the invention binds, or at least, a
fragment of the receptor capable of being bound by the Therapeutic
protein portion of an albumin fusion protein of the invention
(e.g., active site). In either case, the molecule can be rationally
designed using known techniques.
[0642] Preferably, the screening for these molecules involves
producing appropriate cells which express the albumin fusion
proteins of the invention. Preferred cells include cells from
mammals, yeast, Drosophila, or E. coli.
[0643] The assay may simply test binding of a candidate compound to
an albumin fusion protein of the invention, wherein binding is
detected by a label, or in an assay involving competition with a
labeled competitor. Further, the assay may test whether the
candidate compound results in a signal generated by binding to the
fusion protein.
[0644] Alternatively, the assay can be carried out using cell-free
preparations, fusion protein/molecule affixed to a solid support,
chemical libraries, or natural product mixtures. The assay may also
simply comprise the steps of mixing a candidate compound with a
solution containing an albumin fusion protein, measuring fusion
protein/molecule activity or binding, and comparing the fusion
protein/molecule activity or binding to a standard.
[0645] Preferably, an ELISA assay can measure fusion protein level
or activity in a sample (e.g., biological sample) using a
monoclonal or polyclonal antibody. The antibody can measure fusion
protein level or activity by either binding, directly or
indirectly, to the albumin fusion protein or by competing with the
albumin fusion protein for a substrate.
[0646] Additionally, the receptor to which a Therapeutic protein
portion of an albumin fusion protein of the invention binds can be
identified by numerous methods known to those of skill in the art,
for example, ligand panning and FACS sorting (Coligan, et al.,
Current Protocols in Immun., 1(2), Chapter 5, (1991)). For example,
in cases wherein the Therapeutic protein portion of the fusion
protein corresponds to FGF, expression cloning may be employed
wherein polyadenylated RNA is prepared from a cell responsive to
the albumin fusion protein, for example, NIH3T3 cells which are
known to contain multiple receptors for the FGF family proteins,
and SC-3 cells, and a cDNA library created from this RNA is divided
into pools and used to transfect COS cells or other cells that are
not responsive to the albumin fusion protein. Transfected cells
which are grown on glass slides are exposed to the albumin fusion
protein of the present invention, after they have been labeled. The
albumin fusion proteins can be labeled by a variety of means
including iodination or inclusion of a recognition site for a
site-specific protein kinase.
[0647] Following fixation and incubation, the slides are subjected
to auto-radiographic analysis. Positive pools are identified and
sub-pools are prepared and re-transfected using an iterative
sub-pooling and re-screening process, eventually yielding a single
clones that encodes the putative receptor.
[0648] As an alternative approach for receptor identification, a
labeled albumin fusion protein can be photoaffinity linked with
cell membrane or extract preparations that express the receptor
molecule for the Therapeutoc protein component of an albumin fusion
protein of the invention, the linked material may be resolved by
PAGE analysis and exposed to X-ray film. The labeled complex
containing the receptors of the fusion protein can be excised,
resolved into peptide fragments, and subjected to protein
microsequencing. The amino acid sequence obtained from
microsequencing would be used to design a set of degenerate
oligonucleotide probes to screen a cDNA library to identify the
genes encoding the putative receptors.
[0649] Moreover, the techniques of gene-shuffling, motif-shuffling,
exon-shuffling, and/or codon-shuffling (collectively referred to as
"DNA shuffling") may be employed to modulate the activities of the
fusion protein, and/or Therapeutic protein portion or albumin
component of an albumin fusion protein of the present invention,
thereby effectively generating agonists and antagonists of an
albumin fusion protein of the present invention. See generally,
U.S. Pat. Nos. 5,605,793, 5,811,238, 5,830,721, 5,834,252, and
5,837,458, and Patten, P. A., et al., Curr. Opinion Biotechnol.
8:724-33 (1997); Harayama, S. Trends Biotechnol. 16(2):76-82
(1998); Hansson, L. O., et al., J. Mol. Biol. 287:265-76 (1999);
and Lorenzo, M. M. and Blasco, R. Biotechniques 24(2):308-13
(1998); each of these patents and publications are hereby
incorporated by reference). In one embodiment, alteration of
polynucleotides encoding albumin fusion proteins of the invention
and thus, the albumin fusion proteins encoded thereby, may be
achieved by DNA shuffling. DNA shuffling involves the assembly of
two or more DNA segments into a desired molecule by homologous, or
site-specific, recombination. In another embodiment,
polynucleotides encoding albumin fusion proteins of the invention
and thus, the albumin fusion proteins encoded thereby, may be
altered by being subjected to random mutagenesis by error-prone
PCR, random nucleotide insertion or other methods prior to
recombination. In another embodiment, one or more components,
motifs, sections, parts, domains, fragments, etc., of an albumin
fusion protein of the present invention may be recombined with one
or more components, motifs, sections, parts, domains, fragments,
etc. of one or more heterologous molecules. In preferred
embodiments, the heterologous molecules are family members. In
further preferred embodiments, the heterologous molecule is a
growth factor such as, for example, platelet-derived growth factor
(PDGF), insulin-like growth factor (IGF-I), transforming growth
factor (TGF)-alpha, epidermal growth factor (EGF), fibroblast
growth factor (FGF), TGF-beta, bone morphogenetic protein (BMP)-2,
BMP-4, BMP-5, BMP-6, BMP-7, activins A and B, decapentaplegic(dpp),
60A, OP-2, dorsalin, growth differentiation factors (GDFs), nodal,
MIS, inhibin-alpha, TGF-beta1, TGF-beta2, TGF-beta3, TGF-beta5, and
glial-derived neurotrophic factor (GDNF).
[0650] Other preferred fragments are biologically active fragments
of the Therapeutic protein portion and/or albumin component of the
albumin fusion proteins of the present invention. Biologically
active fragments are those exhibiting activity similar, but not
necessarily identical, to an activity of a Therapeutic protein
portion and/or albumin component of the albumin fusion proteins of
the present invention. The biological activity of the fragments may
include an improved desired activity, or a decreased undesirable
activity.
[0651] Additionally, this invention provides a method of screening
compounds to identify those which modulate the action of an albumin
fusion protein of the present invention. An example of such an
assay comprises combining a mammalian fibroblast cell, an albumin
fusion protein of the present invention, and the compound to be
screened and .sup.3[H] thymidine under cell culture conditions
where the fibroblast cell would normally proliferate. A control
assay may be performed in the absence of the compound to be
screened and compared to the amount of fibroblast proliferation in
the presence of the compound to determine if the compound
stimulates proliferation by detetutining the uptake of .sup.3[H]
thymidine in each case. The amount of fibroblast cell proliferation
is measured by liquid scintillation chromatography which measures
the incorporation of .sup.3[H] thymidine. Both agonist and
antagonist compounds may be identified by this procedure.
[0652] In another method, a mammalian cell or membrane preparation
expressing a receptor for the Therapeutic protein component of a
fusion protine of the invention is incubated with a labeled fusion
protein of the present invention in the presence of the compound.
The ability of the compound to enhance or block this interaction
could then be measured. Alternatively, the response of a known
second messenger system following interaction of a compound to be
screened and the receptor is measured and the ability of the
compound to bind to the receptor and elicit a second messenger
response is measured to determine if the compound is a potential
fusion protein. Such second messenger systems include but are not
limited to, cAMP guanylate cyclase, ion channels or
phosphoinositide hydrolysis.
[0653] All of these above assays can be used as diagnostic or
prognostic markers. The molecules discovered using these assays can
be used to treat disease or to bring about a particular result in a
patient (e.g., blood vessel growth) by activating or inhibiting the
fusion protein/molecule. Moreover, the assays can discover agents
which may inhibit or enhance the production of the albumin fusion
proteins of the invention from suitably manipulated cells or
tissues.
[0654] Therefore, the invention includes a method of identifying
compounds which bind to an albumin fusion protein of the invention
comprising the steps of: (a) incubating a candidate binding
compound with an albumin fusion protein of the present invention;
and (b) determining if binding has occurred. Moreover, the
invention includes a method of identifying agonists/antagonists
comprising the steps of: (a) incubating a candidate compound with
an albumin fusion protein of the present invention, (b) assaying a
biological activity, and (b) determining if a biological activity
of the fusion protein has been altered.
Targeted Delivery
[0655] In another embodiment, the invention provides a method of
delivering compositions to targeted cells expressing a receptor for
a component of an albumin fusion protein of the invention.
[0656] As discussed herein, fusion proteins of the invention may be
associated with heterologous polypeptides, heterologous nucleic
acids, toxins, or prodrugs via hydrophobic, hydrophilic, ionic
and/or covalent interactions. In one embodiment, the invention
provides a method for the specific delivery of compositions of the
invention to cells by administering fusion proteins of the
invention (including antibodies) that are associated with
heterologous polypeptides or nucleic acids. In one example, the
invention provides a method for delivering a Therapeutic protein
into the targeted cell. In another example, the invention provides
a method for delivering a single stranded nucleic acid (e.g.,
antisense or ribozymes) or double stranded nucleic acid (e.g., DNA
that can integrate into the cell's genome or replicate episomally
and that can be transcribed) into the targeted cell.
[0657] In another embodiment, the invention provides a method for
the specific destruction of cells (e.g., the destruction of tumor
cells) by administering an albumin fusion protein of the invention
(e.g., polypeptides of the invention or antibodies of the
invention) in association with toxins or cytotoxic prodrugs.
[0658] By "toxin" is meant compounds that bind and activate
endogenous cytotoxic effector systems, radioisotopes, holotoxins,
modified toxins, catalytic subunits of toxins, or any molecules or
enzymes not normally present in or on the surface of a cell that
under defined conditions cause the cell's death. Toxins that may be
used according to the methods of the invention include, but are not
limited to, radioisotopes known in the art, compounds such as, for
example, antibodies (or complement fixing containing portions
thereof) that bind an inherent or induced endogenous cytotoxic
effector system, thymidine kinase, endonuclease, RNAse, alpha
toxin, ricin, abrin, Pseudomonas exotoxin A, diphtheria toxin,
saporin, momordin, gelonin, pokeweed antiviral protein,
alpha-sarcin and cholera toxin. By "cytotoxic prodrug" is meant a
non-toxic compound that is converted by an enzyme, normally present
in the cell, into a cytotoxic compound. Cytotoxic prodrugs that may
be used according to the methods of the invention include, but are
not limited to, glutamyl derivatives of benzoic acid mustard
alkylating agent, phosphate derivatives of etoposide or mitomycin
C, cytosine arabinoside, daunorubisin, and phenoxyacetamide
derivatives of doxorubicin.
Drug Screening
[0659] Further contemplated is the use of the albumin fusion
proteins of the present invention, or the polynucleotides encoding
these fusion proteins, to screen for molecules which modify the
activities of the albumin fusion protein of the present invention
or proteins corresponding to the Therapeutic protein portion of the
albumin fusion protein. Such a method would include contacting the
fusion protein with a selected compound(s) suspected of having
antagonist or agonist activity, and assaying the activity of the
fusion protein following binding.
[0660] This invention is particularly useful for screening
therapeutic compounds by using the albumin fusion proteins of the
present invention, or binding fragments thereof, in any of a
variety of drug screening techniques. The albumin fusion protein
employed in such a test may be affixed to a solid support,
expressed on a cell surface, free in solution, or located
intracellularly. One method of drug screening utilizes eukaryotic
or prokaryotic host cells which are stably transformed with
recombinant nucleic acids expressing the albumin fusion protein.
Drugs are screened against such transformed cells or supernatants
obtained from culturing such cells, in competitive binding assays.
One may measure, for example, the formulation of complexes between
the agent being tested and an albumin fusion protein of the present
invention.
[0661] Thus, the present invention provides methods of screening
for drugs or any other agents which affect activities mediated by
the albumin fusion proteins of the present invention. These methods
comprise contacting such an agent with an albumin fusion protein of
the present invention or a fragment thereof and assaying for the
presence of a complex between the agent and the albumin fusion
protein or a fragment thereof, by methods well known in the art. In
such a competitive binding assay, the agents to screen are
typically labeled. Following incubation, free agent is separated
from that present in bound form, and the amount of free or
uncomplexed label is a measure of the ability of a particular agent
to bind to the albumin fusion protein of the present invention.
[0662] Another technique for drug screening provides high
throughput screening for compounds having suitable binding affinity
to an albumin fusion protein of the present invention, and is
described in great detail in European Patent Application 84/03564,
published on Sep. 13, 1984, which is incorporated herein by
reference herein. Briefly stated, large numbers of different small
peptide test compounds are synthesized on a solid substrate, such
as plastic pins or some other surface. The peptide test compounds
are reacted with an albumin fusion protein of the present invention
and washed. Bound peptides are then detected by methods well known
in the art. Purified albumin fusion protein may be coated directly
onto plates for use in the aforementioned drug screening
techniques. In addition, non-neutralizing antibodies may be used to
capture the peptide and immobilize it on the solid support.
[0663] This invention also contemplates the use of competitive drug
screening assays in which neutralizing antibodies capable of
binding an albumin fusion protein of the present invention
specifically compete with a test compound for binding to the
albumin fusion protein or fragments thereof. In this manner, the
antibodies are used to detect the presence of any peptide which
shares one or more antigenic epitopes with an albumin fusion
protein of the invention.
Binding Peptides and Other Molecules
[0664] The invention also encompasses screening methods for
identifying polypeptides and nonpolypeptides that bind albumin
fusion proteins of the invention, and the binding molecules
identified thereby. These binding molecules are useful, for
example, as agonists and antagonists of the albumin fusion proteins
of the invention. Such agonists and antagonists can be used, in
accordance with the invention, in the therapeutic embodiments
described in detail, below.
[0665] This method comprises the steps of:
[0666] contacting an albumin fusion protein of the invention with a
plurality of molecules; and
[0667] identifying a molecule that binds the albumin fusion
protein.
[0668] The step of contacting the albumin fusion protein of the
invention with the plurality of molecules may be effected in a
number of ways. For example, one may contemplate immobilizing the
albumin fusion protein on a solid support and bringing a solution
of the plurality of molecules in contact with the immobilized
polypeptides. Such a procedure would be akin to an affinity
chromatographic process, with the affinity matrix being comprised
of the immobilized albumin fusion protein of the invention. The
molecules having a selective affinity for the albumin fusion
protein can then be purified by affinity selection. The nature of
the solid support, process for attachment of the albumin fusion
protein to the solid support, solvent, and conditions of the
affinity isolation or selection are largely conventional and well
known to those of ordinary skill in the art.
[0669] Alternatively, one may also separate a plurality of
polypeptides into substantially separate fractions comprising a
subset of or individual polypeptides. For instance, one can
separate the plurality of polypeptides by gel electrophoresis,
column chromatography, or like method known to those of ordinary
skill for the separation of polypeptides. The individual
polypeptides can also be produced by a transformed host cell in
such a way as to be expressed on or about its outer surface (e.g.,
a recombinant phage). Individual isolates can then be "probed" by
an albumin fusion protein of the invention, optionally in the
presence of an inducer should one be required for expression, to
determine if any selective affinity interaction takes place between
the albumin fusion protein and the individual clone. Prior to
contacting the albumin fusion protein with each fraction comprising
individual polypeptides, the polypeptides could first be
transferred to a solid support for additional convenience. Such a
solid support may simply be a piece of filter membrane, such as one
made of nitrocellulose or nylon. In this manner, positive clones
could be identified from a collection of transformed host cells of
an expression library, which harbor a DNA construct encoding a
polypeptide having a selective affinity for an albumin fusion
protein of the invention. Furthermore, the amino acid sequence of
the polypeptide having a selective affinity for an albumin fusion
protein of the invention can be determined directly by conventional
means or the coding sequence of the DNA encoding the polypeptide
can frequently be determined more conveniently. The primary
sequence can then be deduced from the corresponding DNA sequence.
If the amino acid sequence is to be determined from the polypeptide
itself, one may use microsequencing techniques. The sequencing
technique may include mass spectroscopy.
[0670] In certain situations, it may be desirable to wash away any
unbound polypeptides from a mixture of an albumin fusion protein of
the invention and the plurality of polypeptides prior to attempting
to determine or to detect the presence of a selective affinity
interaction. Such a wash step may be particularly desirable when
the albumin fusion protein of the invention or the plurality of
polypeptides are bound to a solid support.
[0671] The plurality of molecules provided according to this method
may be provided by way of diversity libraries, such as random or
combinatorial peptide or nonpeptide libraries which can be screened
for molecules that specifically bind an albumin fusion protein of
the invention. Many libraries are known in the art that can be
used, e.g., chemically synthesized libraries, recombinant (e.g.,
phage display libraries), and in vitro translation-based libraries.
Examples of chemically synthesized libraries are described in Fodor
et al., Science 251:767-773 (1991); Houghten et al., Nature
354:8486 (1991); Lam et al., Nature 354:82-84 (1991); Medynski,
Bio/Technology 12:709-710 (1994); Gallop et al., J. Medicinal
Chemistry 37(9):1233-1251 (1994); Ohlmeyer et al., Proc. Natl.
Acad. Sci. USA 90:10922-10926 (1993); Erb et al., Proc. Natl. Acad.
Sci. USA 91:11422-11426 (1994); Houghten et al., Biotechniques
13:412 (1992); Jayawickreme et al., Proc. Natl. Acad. Sci. USA
91:1614-1618 (1994); Salmon et al., Proc. Natl. Acad. Sci. USA
90:11708-11712 (1993); PCT Publication No. WO 93/20242; and Brenner
and Lerner, Proc. Natl. Acad. Sci. USA 89:5381-5383 (1992).
[0672] Examples of phage display libraries are described in Scott
et al., Science 249:386-390 (1990); Devlin et al., Science,
249:404-406 (1990); Christian et al., 1992, J. Mol. Biol.
227:711-718 1992); Lenstra, J. Immunol. Meth. 152:149-157 (1992);
Kay et al., Gene 128:59-65 (1993); and PCT Publication No. WO
94/18318 dated Aug. 18, 1994.
[0673] In vitro translation-based libraries include but are not
limited to those described in PCT Publication No. WO 91/05058 dated
Apr. 18, 1991; and Mattheakis et al., Proc. Natl. Acad. Sci. USA
91:9022-9026 (1994).
[0674] By way of examples of nonpeptide libraries, a benzodiazepine
library (see e.g., Bunin et al., Proc. Natl. Acad. Sci. USA
91:4708-4712 (1994)) can be adapted for use. Peptoid libraries
(Simon et al., Proc. Natl. Acad. Sci. USA 89:9367-9371 (1992)) can
also be used. Another example of a library that can be used, in
which the amide functionalities in peptides have been permethylated
to generate a chemically transformed combinatorial library, is
described by Ostresh et al. (Proc. Natl. Acad. Sci. USA
91:11138-11142 (1994)).
[0675] The variety of non-peptide libraries that are useful in the
present invention is great. For example, Ecker and Crooke
(Bio/Technology 13:351-360 (1995) list benzodiazepines, hydantoins,
piperazinediones, biphenyls, sugar analogs, beta-mercaptoketones,
arylacetic acids, acylpiperidines, benzopyrans, cubanes, xanthines,
aminimides, and oxazolones as among the chemical species that form
the basis of various libraries.
[0676] Non-peptide libraries can be classified broadly into two
types: decorated monomers and oligomers. Decorated monomer
libraries employ a relatively simple scaffold structure upon which
a variety functional groups is added. Often the scaffold will be a
molecule with a known useful pharmacological activity. For example,
the scaffold might be the benzodiazepine structure.
[0677] Non-peptide oligomer libraries utilize a large number of
monomers that are assembled together in ways that create new shapes
that depend on the order of the monomers. Among the monomer units
that have been used are carbamates, pyrrolinones, and morpholinos.
Peptoids, peptide-like oligomers in which the side chain is
attached to the alpha amino group rather than the alpha carbon,
form the basis of another version of non-peptide oligomer
libraries. The first non-peptide oligomer libraries utilized a
single type of monomer and thus contained a repeating backbone.
Recent libraries have utilized more than one monomer, giving the
libraries added flexibility.
[0678] Screening the libraries can be accomplished by any of a
variety of commonly known methods. See, e.g., the following
references, which disclose screening of peptide libraries: Parmley
et al., Adv. Exp. Med. Biol. 251:215-218 (1989); Scott et al,.
Science 249:386-390 (1990); Fowlkes et al., BioTechniques
13:422-427 (1992); Oldenburg et al., Proc. Natl. Acad. Sci. USA
89:5393-5397 (1992); Yu et al., Cell 76:933-945 (1994); Staudt et
al., Science 241:577-580 (1988); Bock et al., Nature 355:564-566
(1992); Tuerk et al., Proc. Natl. Acad. Sci. USA 89:6988-6992
(1992); Ellington et al., Nature 355:850-852 (1992); U.S. Pat. No.
5,096,815, U.S. Pat. No. 5,223,409, and U.S. Pat. No. 5,198,346,
all to Ladner et al.; Rebar et al., Science 263:671-673 (1993); and
PCT Publication No. WO 94/18318.
[0679] In a specific embodiment, screening to identify a molecule
that binds an albumin fusion protein of the invention can be
carried out by contacting the library members with an albumin
fusion protein of the invention immobilized on a solid phase and
harvesting those library members that bind to the albumin fusion
protein. Examples of such screening methods, termed "panning"
techniques are described by way of example in Parmley et al., Gene
73:305-318 (1988); Fowlkes et al., BioTechniques 13:422-427 (1992);
PCT Publication No. WO 94/18318; and in references cited
herein.
[0680] In another embodiment, the two-hybrid system for selecting
interacting proteins in yeast (Fields et al., Nature 340:245-246
(1989); Chien et al., Proc. Natl. Acad. Sci. USA 88:9578-9582
(1991) can be used to identify molecules that specifically bind to
polypeptides of the invention.
[0681] Where the binding molecule is a polypeptide, the polypeptide
can be conveniently selected from any peptide library, including
random peptide libraries, combinatorial peptide libraries, or
biased peptide libraries. The term "biased" is used herein to mean
that the method of generating the library is manipulated so as to
restrict one or more parameters that govern the diversity of the
resulting collection of molecules, in this case peptides.
[0682] Thus, a truly random peptide library would generate a
collection of peptides in which the probability of finding a
particular amino acid at a given position of the peptide is the
same for all 20 amino acids. A bias can be introduced into the
library, however, by specifying, for example, that a lysine occur
every fifth amino acid or that positions 4, 8, and 9 of a
decapeptide library be fixed to include only arginine. Clearly,
many types of biases can be contemplated, and the present invention
is not restricted to any particular bias. Furthermore, the present
invention contemplates specific types of peptide libraries, such as
phage displayed peptide libraries and those that utilize a DNA
construct comprising a lambda phage vector with a DNA insert.
[0683] As mentioned above, in the case of a binding molecule that
is a polypeptide, the, polypeptide may have about 6 to less than
about 60 amino acid residues, preferably about 6 to about 10 amino
acid residues, and most preferably, about 6 to about 22 amino
acids. In another embodiment, a binding polypeptide has in the
range of 15-100 amino acids, or 20-50 amino acids.
[0684] The selected binding polypeptide can be obtained by chemical
synthesis or recombinant expression.
Other Activities
[0685] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention,
may be employed in treatment for stimulating re-vascularization of
ischemic tissues due to various disease conditions such as
thrombosis, arteriosclerosis, and other cardiovascular conditions.
The albumin fusion proteins of the invention and/or polynucleotides
encoding albumin fusion proteins of the invention may also be
employed to stimulate angiogenesis and limb regeneration, as
discussed above.
[0686] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention
may also be employed for treating wounds due to injuries, burns,
post-operative tissue repair, and ulcers since they are mitogenic
to various cells of different origins, such as fibroblast cells and
skeletal muscle cells, and therefore, facilitate the repair or
replacement of damaged or diseased tissue.
[0687] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention
may also be employed stimulate neuronal growth and to treat and
prevent neuronal damage which occurs in certain neuronal disorders
or neuro-degenerative conditions such as Alzheimer's disease,
Parkinson's disease, and AIDS-related complex. An albumin fusion
protein of the invention and/or polynucleotide encoding an albumin
fusion protein of the invention may have the ability to stimulate
chondrocyte growth, therefore, they may be employed to enhance bone
and periodontal regeneration and aid in tissue transplants or bone
grafts.
[0688] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention
may be also be employed to prevent skin aging due to sunburn by
stimulating keratinocyte growth.
[0689] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention
may also be employed for preventing hair loss, since FGF family
members activate hair-forming cells and promotes melanocyte growth.
Along the same lines, an albumin fusion protein of the invention
and/or polynucleotide encoding an albumin fusion protein of the
invention may be employed to stimulate growth and differentiation
of hematopoietic cells and bone marrow cells when used in
combination with other cytokines.
[0690] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention
may also be employed to maintain organs before transplantation or
for supporting cell culture of primary tissues. An albumin fusion
protein of the invention and/or polynucleotide encoding an albumin
fusion protein of the invention may also be employed for inducing
tissue of mesodermal origin to differentiate in early embryos.
[0691] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention
may also increase or decrease the differentiation or proliferation
of embryonic stem cells, besides, as discussed above, hematopoietic
lineage.
[0692] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention
may also be used to modulate mammalian characteristics, such as
body height, weight, hair color, eye color, skin, percentage of
adipose tissue, pigmentation, size, and shape (e.g., cosmetic
surgery). Similarly, an albumin fusion protein of the invention
and/or polynucleotide encoding an albumin fusion protein of the
invention may be used to modulate mammalian metabolism affecting
catabolism, anabolism, processing, utilization, and storage of
energy.
[0693] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention
may be used to change a mammal's mental state or physical state by
influencing biorhythms, caricadic rhythms, depression (including
depressive disorders), tendency for violence, tolerance for pain,
reproductive capabilities (preferably by Activin or Inhibin-like
activity), hormonal or endocrine levels, appetite, libido, memory,
stress, or other cognitive qualities.
[0694] An albumin fusion protein of the invention and/or
polynucleotide encoding an albumin fusion protein of the invention
may also be used as a food additive or preservative, such as to
increase or decrease storage capabilities, fat content, lipid,
protein, carbohydrate, vitamins, minerals, cofactors or other
nutritional components.
[0695] The above-recited applications have uses in a wide variety
of hosts. Such hosts include, but are not limited to, human,
murine, rabbit, goat, guinea pig, camel, horse, mouse, rat,
hamster, pig, micro-pig, chicken, goat, cow, sheep, dog, cat,
non-human primate, and human. In specific embodiments, the host is
a mouse, rabbit, goat, guinea pig, chicken, rat, hamster, pig,
sheep, dog or cat. In preferred embodiments, the host is a mammal.
In most preferred embodiments, the host is a human.
[0696] Having generally described the invention, the same will be
more readily understood by reference to the following examples,
which are provided by way of illustration and are not intended as
limiting.
[0697] Without further description, it is believed that one of
ordinary skill in the art can, using the preceding description and
the following illustrative examples, make and utilize the
alterations detected in the present invention and practice the
claimed methods. The following working examples therefore,
specifically point out preferred embodiments of the present
invention, and are not to be construed as limiting in any way the
remainder of the disclosure.
Examples
Example 1
Preparation of HA-hGH Fusion Proteins
[0698] An HA-hGH fusion protein was prepared as follows:
[0699] Cloning of hGH cDNA
[0700] The hGH cDNA was obtained from a human pituitary gland cDNA
library (catalogue number HL1097v, Clontech Laboratories, Inc) by
PCR amplification. Two oligonucleotides suitable for PCR
amplification of the hGH cDNA, HGH1 and HGH2, were synthesized
using an Applied Biosystems 380B Oligonucleotide Synthesizer.
TABLE-US-00003 HGH1: (SEQ ID NO: 1) 5' - CCCAAGAATTCCCTTATCCAGGC -
3' HGH2: (SEQ ID NO: 2) 5' - GGGAAGCTTAGAAGCCACAGGATCCCTCCACAG -
3'
[0701] HGH 1 and HGH2 differed from the equivalent portion of the
hGH cDNA sequence (Martial et. al., 1979) by two and three
nucleotides, respectively, such that after PCR amplification an
EcoRI site would be introduced to the 5' end of the cDNA and a
BamH1 site would be introduced into the 3' end of the cDNA. In
addition, HGH2 contained a HindIII site immediately downstream of
the hGH sequence.
[0702] PCR amplification using a Perkin-Elmer-Cetus Thermal Cycler
9600 and a Perkin-Elmer-Cetus PCR kit, was performed using
single-stranded DNA template isolated from the phage particles of
the cDNA library as follows: 10 .mu.L phage particles were lysed by
the addition of 10 .mu.L phage lysis buffer (280 .mu.g/mL
proteinase K in TE buffer) and incubation at 55.degree. C. for 15
min followed by 85.degree. C. for 15 min. After a 1 min. incubation
on ice, phage debris was pelleted by centrifugation at 14,000 rpm
for 3 min. The PCR mixture contained 6 .mu.L of this DNA template,
0.1 .mu.M of each primer and 200 .mu.M of each deoxyribonucleotide.
PCR was carried out for 30 cycles, denaturing at 94.degree. C. for
30 s, annealing at 65.degree. C. for 30 s and extending at
72.degree. C. for 30 s, increasing the extension time by 1 s per
cycle.
[0703] Analysis of the reaction by gel electrophoresis showed a
single product of the expected size (589 base pairs).
[0704] The PCR product was purified using Wizard PCR Preps DNA
Purification System (Promega Corp) and then digested with EcoRl and
HindIII. After further purification of the EcoRl-HindIII fragment
by gel electrophoresis, the product was cloned into pUC19 (GIBCO
BRL) digested with EcoRI and HindIII, to give pHGH1. DNA sequencing
of the EcoRl HindIII region showed that the PCR product was
identical in sequence to the hGH sequence (Martial et al., 1979),
except at the 5' and 3' ends, where the EcoRl and BamHI sites had
been introduced, respectively.
[0705] Expression of the hGH cDNA.
[0706] The polylinker sequence of the phagemid pBluescribe (+)
(Stratagene) was replaced by inserting an oligonucleotide linker,
formed by annealing two 75-mer oligonucleotides, between the EcoRI
and HindIII sites to form pBST(+). The new polylinker included a
unique NotI site.
[0707] The NotI HA expression cassette of pAYE309 (EP 431 880)
comprising the PRBI promoter, DNA encoding the HA/MF.alpha.-1
hybrid leader sequence, DNA encoding HA and the ADH1 terminator,
was transferred to pBST(+) to form pHA1. The HA coding sequence was
removed from this plasmid by digestion with HindIII followed by
religation to form pHA2.
[0708] Cloning of the hGH cDNA, as described in Example 1, provided
the hGH coding region lacking the pro-hGH sequence and the first 8
base pairs (bp) of the mature hGH sequence. In order to construct
an expression plasmid for secretion of hGH from yeast, a yeast
promoter, signal peptide and the first 8 by of the hGH sequence
were attached to the 5' end of the cloned hGH sequence as follows:
The HindIII-SfaNI fragment from pHA 1 was attached to the 5' end of
the EcoRI/HindIII fragment from pHGHI via two synthetic
oligonucleotides, HGH3 and HGH4 (which can anneal to one another in
such a way as to generate a double stranded fragment of DNA with
sticky ends that can anneal with SfaNI and EcoRI sticky ends):
TABLE-US-00004 HGH3: 5' - GATAAAGATTCCCAAC - 3' (SEQ ID NO: 3)
HGH4: 5' - AATTGTTGGGAATCTTT - 3' (SEQ ID NO: 4)
[0709] The HindIII fragment so formed was cloned into
HindIII-digested pHA2 to make pHGH2, such that the hGH cDNA was
positioned downstream of the PRBI promoter and HA/MF.alpha.-1
fusion leader sequence (see, International Publication No. WO
90/01063). The NotI expression cassette contained in pHGH2, which
included the ADH1 terminator downstream of the hGH cDNA, was cloned
into NotI-digested pSAC35 (Sleep et al., BioTechnology 8:42 (1990))
to make pHGH12. This plasmid comprised the entire 2 .mu.m plasmid
to provide replication functions and the LEU2 gene for selection of
transformants.
[0710] pHGH12 was introduced into S. cerevisiae D88 by
transformation and individual transformants were grown for 3 days
at 30.degree. C. in 10 mL YEPD (1% w/v yeast extract, 2% w/v,
peptone, 2% w/v, dextrose).
[0711] After centrifugation of the cells, the supernatants were
examined by SDS-polyacrylamide gel electrophoresis (SDS-PAGE) and
were found to contain protein which was of the expected size and
which was recognized by anti-hGH antiserum (Sigma, Poole, UK) on
Western blots.
[0712] Cloning and Expression of an HA-hGH Fusion Protein.
[0713] In order to fuse the HA cDNA to the 5' end of the hGH cDNA,
the pHA1 HindIII-Bsu361 fragment (containing most of the HA cDNA)
was joined to the pHGH1 EcoRI-HindIII fragment (containing most of
the hGH cDNA) via two oligonucleotides, HGH7 and HGH8
TABLE-US-00005 HGH7: 5'-TTAGGCTTATTCCCAAC 3' (SEQ ID NO: 5) HGH8:
5'-AATTGTTGGGAATAAGCC 3' (SEQ ID NO: 6)
[0714] The HindIII fragment so formed was cloned into pHA2 digested
with HindIII to make pHGH10, and the NotI expression cassette of
this plasmid was cloned into NotI-digested pSAC35 to make
pHGH16.
[0715] pHGH16 was used to transform S. cerevisiae D88 and
supernatants of cultures were analyzed as described above. A
predominant band was observed that had a molecular weight of
approximately 88 kD, corresponding to the combined masses of HA and
hGH. Western blotting using anti-HA and anti-hGH antisera (Sigma)
confirmed the presence of the two constituent parts of the albumin
fusion protein.
[0716] The albumin fusion protein was purified from culture
supernatant by cation exchange chromatography, followed by anion
exchange and gel permeation chromatography. Analysis of the
N-terminus of the protein by amino acid sequencing confirmed the
presence of the expected albumin sequence.
[0717] An in vitro growth hormone activity assay (Ealey et al.,
Growth Regulation 5:36 (1995)) indicated that the albumin fusion
protein possessed full hGH activity. In a hypophysectomised rat
weight gain model, performed essentially as described in the
European Pharmacopoeia (1987, monograph 556), the fusion molecule
was more potent than hGH when the same number of units of activity
(based on the above in vitro assay) were administered daily.
Further experiments in which the albumin fusion protein was
administered once every four days showed a similar overall growth
response to a daily administration of hGH. Pharmacokinetic
experiments in which .sup.125I-labeled protein was administered to
rats indicated an approximately ten-fold increase in circulatory
half-life for the albumin fusion protein compared to hGH.
[0718] A similar plasmid was constructed in which DNA encoding the
S. cerevisiae invertase (SUC2) leader sequence replaced the
sequence for the hybrid leader, such that the encoded leader and
the junction (.dwnarw.) with the HA sequence were as follows:
TABLE-US-00006 (SEQ ID NO: 7) . . . MLLQAFLFLLAGFAAKISA .dwnarw.
DAHKS Invertase leader HA sequence . . .
[0719] On introduction into S. cerevisiae DBI, this plasmid
directed the expression and secretion of the albumin fusion protein
at a level similar to that obtained with pHGH16. Analysis of the
N-terminus of the albumin fusion protein indicated precise and
efficient cleavage of the leader sequence from the mature
protein.
[0720] Cloning and Expression of an hGH-HA Fusion Protein.
[0721] In order to fuse the hGH cDNA to the 5' end of the HA cDNA,
the HA cDNA was first altered by site-directed mutagenesis to
introduce an EcoNl site near the 5' end of the coding region. This
was done by the method of Kunkel et al. (Methods in Enzymol.
154:367 (1987)) using single-stranded DNA template prepared from
pHAI and a synthetic oligonucleotide, LEU4:
TABLE-US-00007 LEU4: 5'-GAGATGCACACCTGAGTGAGG-3' (SEQ ID NO: 8)
[0722] Site-directed mutagenesis using this oligonucleotide changed
the coding sequence of the HA cDNA from Lys4 to Leu4 (K4L).
However, this change was repaired when the hGH cDNA was
subsequently joined at the 5' end by linking the pHGH2 Notl-BamHI
fragment to the EcoNI-Notl fragment of the mutated pHAI, via the
two oligonucleotides HGH5 and HGH6:
TABLE-US-00008 HGH5: 5'-GATCCTGTGGCTTCGATGCACACAAGA-3' (SEQ ID NO:
9) HGH6: 5'-CTCTTGTGTGCATCGAAGCCACAG-3' (SEQ ID NO: 10)
[0723] The Notl fragment so formed was cloned into Notl-digested
pSAC35 to make pHGH14. pHGH14 was used to transform S. cerevisiae
D88 and supernatants of culture were analyzed as above. A
predominant band was observed that had a molecular weight of
approximately 88 kD, corresponding to the combined masses of hGH
and HA. Western blotting using anti-HA and anti-hGH antisera
confirmed the presence of the two constituent parts of the albumin
fusion protein.
[0724] The albumin fusion protein was purified from culture
supernatant by cation exchange chromatography, followed by anion
exchange and gel permeation chromatography. Analysis of the
N-terminus of the protein by amino acid sequencing confirmed the
presence of the expected hGH sequence.
[0725] In vitro studies showed that the albumin fusion protein
retained hGH activity, but was significantly less potent than an
albumin fusion protein comprising full length HA (1-585) as the
N-terminal portion and hGH as the C-terminal portion, as described
above.
[0726] Construction of Plasmids for the Expression of hGH Fusions
to Domains of HA.
[0727] Fusion polypeptides were made in which the hGH molecule was
fused to the first two domains of HA (residues 1 to 387). Fusion to
the N terminus of hGH was achieved by joining the pHA1 HindIII-Sapl
fragment, which contained most of the coding sequence for domains 1
and 2 of HA, to the pHGHI EcoRl-HindIII fragment, via the
oligonucleotides HGH 11 and HGH 12:
TABLE-US-00009 (SEQ ID NO: 11) HGH11:
5'-TGTGGAAGAGCCTCAGAATTTATTCCCAAC-3' (SEQ ID NO: 12) HGH12:
5'-AATTGTTGGGAATAAATTCTGAGGCTCTTCC-3'
[0728] The HindIII fragment so formed was cloned into
HindIII-digested pHA2 to make pHGH37 and the Notl expression
cassette of this plasmid was cloned into Notl-digested pSAC35.
[0729] The resulting plasmid, pHGH38, contained an expression
cassette that was found to direct secretion of the fusion
polypeptide into the supernatant when transformed into S.
cerevisiae DB 1. Western blotting using anti-HA and anti-hGH
antisera confirmed the presence of the two constituent parts of the
albumin fusion protein.
[0730] The albumin fusion protein was purified from culture
supernatant by cation exchange chromatography followed by gel
permeation chromatography.
[0731] In vivo studies with purified protein indicated that the
circulatory half-life was longer than that of hGH, and similar to
that of an albumin fusion protein comprising full-length HA (1-585)
as the N-terminal portion and hGH as the C-terminal portion, as
described above. In vitro studies showed that the albumin fusion
protein retained hGH activity.
[0732] Using a similar strategy as detailed above, an albumin
fusion protein comprising the first domain of HA (residues 1-194)
as the N-terminal portion and hGH as the C-terminal portion, was
cloned and expressed in S. cerevisiae DBL. Western blotting of
culture supernatant using anti-HA and anti-hGH antisera confirmed
the presence of the two constituent parts of the albumin fusion
protein.
[0733] Fusion of HA to hGH Using a Flexible Linker Sequence
[0734] Flexible linkers, comprising repeating units of
[Gly-Gly-Gly-Gly-Ser].sub.n, where n was either 2 or 3, were
introduced between the HA and hGH albumin fusion protein by cloning
of the oligonucleotides HGH16, HGH17, HGH18 and HGH19:
TABLE-US-00010 HGH16: (SEQ ID NO: 13)
5'-TTAGGCTTAGGTGGCGGTGGATCCGGCGGTGGTGGATCTTTCCCA AC-3' HGH17: (SEQ
ID NO: 14) 5'-AATTGTTGGGAAAGATCCACCACCGCCGGATCCACCGCCACGTAAGC C-3'
HGH18: (SEQ ID NO: 15)
5'-TTAGGCTTAGGCGGTGGTGGATCTGGTGGCGGCGGATCTGGTGGCGG
TGGATCCTTCCCAAC-3' HGH19: (SEQ ID NO: 16)
5'-AATTGTTGGGAAGGATCCACCGCCACCAGATCCGCCGCCACCAGATC
CACCACCGCCTAAGCC-3'
[0735] Annealing of HGH16 with HGH17 resulted in n=2, while HGH18
annealed to HGH19 resulted in n=3. After annealing, the
double-stranded oligonucleotides were cloned with the EcoRI-Bsu361
fragment isolated from pHGH1 into Bsu361-digested pHGH10 to make
pHGH56 (where n=2) and pHGH57 (where n=3). The Notl expression
cassettes from these plasmids were cloned into NotI-digested pSAC35
to make pHGH58 and pHGH59, respectively.
[0736] Cloning of the oligonucleotides to make pHGH56 and pHGH57
introduced a BamHI site in the linker sequences. It was therefore
possible to construct linker sequences in which n=1 and n=4, by
joining either the HindIII-BamH1 fragment from pHGH56 to the
BamHI-HindIII fragment from pHGH57 (making n=1), or the
HindIII-BamHI fragment from pHGH57 to the BamHI-HindIII fragment
from pHGH56 (making n=2). Cloning of these fragments into the
HindIII site of pHA2, resulted in pHGH60 (n=1) and pHGH61 (n=4).
The Notl expression cassettes from pHGH60 and pHGH61 were cloned
into Notl-digested pSAC35 to make pHGH62 and pHGH63,
respectively.
[0737] Transformation of S. cerevisiae with pHGH58, pHGH59, pHGH62
and pHGH63 resulted in transformants that secreted the fusion
polypeptides into the supernatant. Western blotting using anti-HA
and anti-hGH antisera confirmed the presence of the two constituent
parts of the albumin fusion proteins.
[0738] The albumin fusion proteins were purified from culture
supernatant by cation exchange chromatography, followed by anion
exchange and gel permeation chromatography. Analysis of the
N-termini of the proteins by amino acid sequencing confirmed the
presence of the expected albumin sequence. Analysis of the purified
proteins by electrospray mass spectrometry confirmed an increase in
mass of 315 D (n=1), 630 D (n=2), 945 D (n=3) and 1260 D (n=4)
compared to the HA-hGH fusion protein described above. The purified
protein was found to be active in vitro.
[0739] Increased Shelf-Life of HA-hGH Fusion Proteins: Methods
[0740] HA-hGH and hGH were separately diluted in cell culture media
containing 5% horse serum to final concentrations of 100-200
.mu.g/ml and incubated at 4, 37 or 50.degree. C. At time zero and
at weekly intervals thereafter, aliquots of the samples were tested
for their biological activity in the Nb2 cell proliferation assay,
and the data normalized to the biological activity of the control
(hGH solution at time zero). In other assays hGH and HA-hGH were
incubated in phosphate buffer saline in at 4, 37 and 50 degree
C.
[0741] Nb2 cell proliferation assay: The growth of these cells is
dependent on hGH or other lactogenic hormones. In a typical
experiment 10.sup.4 cells/well are plated in 96-well plate in the
presence of different concentration of hGH or HA-hGH in media such
as DMEM containing 5-10% horse serum for 24-48 hrs in the
incubator. After the incubation period, 1:10 volume of MTT (5 mg/ml
in H.sub.2O) is added to each well and the plate is incubated for a
further 6-16 hrs. The growing cells convert MTT to insoluble
formazan. The formazan is solublized by acidic isopropanol, and the
color produced is measured at 570 nm on microtiter plate reader.
The extent of formazan formation reflects the level of cellular
proliferation.
[0742] Increased Shelf-Life of HA-hGH Fusion Proteins: Results
[0743] The fusion of Therapeutic proteins to albumin confers
stability in aqueous or other solution. FIG. 1 depicts the extended
shelf-life of an HA fusion protein in terms of the biological
activity of HA-hGH remaining after storage in cell culture media
for up to 5 weeks at 37.degree. C. A solution of 200 .mu.g/ml
HA-hGH was prepared in tissue culture media containing 5% horse
serum, and the solution incubated at 37.degree. C. starting at time
zero. At the indicated times, a sample was removed and tested for
its biological activity in the Nb2 cell assay, at 2 ng/ml final
concentration. As shown in FIG. 1, the biological activity of
HA-hGH remains essentially intact (within experimental variation)
after 5 weeks of incubation at 37.degree. C. The recombinant hGH
used as control for this experiment lost its biological activity in
the first week of the experiment.
[0744] FIG. 2 shows the stability of HA-hGH after storage in cell
culture media for up to 3 weeks at 4, 37, or 50.degree. C. At time
zero, a solution of HA-hGH was prepared in tissue culture media
containing 5% horse serum, and incubated at 4, 37, and 50.degree.
C. At the indicated periods a sample was removed and assayed for
its biological activity in the Nb2 cell proliferation assay, at 60
ng/ml final concentration. HA-hGH retains over 90% of its initial
activity at all temperatures tested for at least 3 weeks after
incubation while hGH loses its biological activity within the first
week. This level of activity is further retained for at least 7
weeks at 37.degree. C. and 5 weeks at 50.degree. C. These results
indicate that HA-hGH is highly stable in aqueous solution even
under temperature stress.
[0745] FIGS. 3A and 3B show the stable biological activity of
HA-hGH compared to hGH in the Nb2 cell proliferation assay. Nb2
cells were grown in the presence of increasing concentrations of
recombinant hGH or HA-hGH, added at time zero. The cells were
incubated for 24 or 48 hours before measuring the extent of
proliferation by the MTT method. The increased stability of HA-hGH
in the assay results in essentially the same proliferative activity
at 24 hours (FIG. 3A) as at 48 hours (FIG. 3B) while hGH shows a
significant reduction in its proliferative activity after 48 hours
of incubation (FIGS. 3A and 3B). Compared to hGH, the HA-hGH has
lower biological potency after 1 day; the albumin fusion protein is
about 5 fold less potent than hGH. However, after 2 days the HA-hGH
shows essentially the same potency as hGH due to the short life of
hGH in the assay. This increase in the stability of the hGH as an
albumin fusion protein has a major unexpected impact on the
biological activity of the protein. Although the potency of the
albumin fusion proteins is slightly lower than the unfused
counterparts in rapid bioassays, their biological stability results
in much higher biological activity in the longer term in vitro
assay or in vivo assays.
Example 2
Preparation of HA Fusion Proteins
[0746] FIG. 4 shows a map of a plasmid (pPPC0005) that can be used
as the base vector for cloning the cDNAs of therapeutic partners to
form HA-fusions. For example, digestion of this vector with the
restriction enzymes Bsu36I/Partial HindIII will allow for the
insertion of a cDNA modified at the 5' end to encode the last 5
amino acids of HA including the Bsu36I site and at the 3' end to
include a double stop codon and HindIII site. As another example,
digestion of this vector with the restriction enzymes Bsu36I, SphI
allows for the insertion of a cDNA modified at the 5' end to encode
the last 5 amino acids of HA including the Bsu36I site and at the
3' end to include a double stop codon, HindIII site and the ADHI
terminator sequence up to and including the SphI site.
[0747] This plasmid may easily be modified by one of skill in the
art, for example, to modify, add or delete restriction sites so
that one may more easily clone a Therapeutic protein, or fragment
or variant of into the vector for the purpose of making an albumin
fusion protein of the invention.
[0748] For example, for the purpose of making an albumin fusion
protein where the Therapeutic moiety is placed N-terminal to the
(mature) albumin protein, restriction sites were added at the 5'
end of the DNA encoding HA in pPPC0005 shown in FIG. 4).
[0749] Because it was desired to add unique XhoI and ClaI sites at
the 5' end of the DNA encoding the HA protein in pPPC0005, it was
first necessary to remove those same sites from the plasmid
(located 3' of the ADH1 terminator sequence). This was accomplished
by cutting pPPC0005 with XhoI and ClaI, filling in the sticky ends
with T4 DNA polymerase, and religating the blunt ends to create
pPPC0006
[0750] Engineering the Xho and Cla I restriction sites into the
Fusion leader sequence just 5' of the DNA encoding the HA protein
in pPPC0006 was accomplished using two rounds of PCR. The first
pair of oligonucleotides are those of SEQ ID NO:19 and SEQ ID
NO:20. SEQ ID 19 contains four point mutations relative to the DNA
sequence encoding the Fusion leader sequence and the beginning of
the HA protein. These mutations are necessary to create the XhoI
site in the fusion leader sequence and the Cla I site just at the
beginning of the DNA encoding the HA protein. These four mutations
are underlined in the sequence shown below. In pPPC0006 the
nucleotides at these four positions from 5' to 3' are T, G, T, and
G. 5'-GCCTCGAGAAAAGAGATGCACACAAGAGTGAGGTTGCATCGATTTAAAGAT TTGGG-3'
(SEQ ID NO:19)
5'-AATCGATGAGCAACCTCACTCTTGTGTGCATCTCTTTTCTCGAGGCTCCTGGAA TAAGC-3'
(SEQ ID NO:20). A second round of PCR is then performed with an
upstream flanking primer, 5'-TACAAACTTAAGAGTCCAATTAGC-3' (SEQ ID
NO:21) and a downstream flanking primer
5'-CACTTCTCTAGAGTGGTTTCATATGTCTT-3' (SEQ ID NO:22). The resulting
PCR product is then purified and then digested with AflI and XbaI
and ligated into the same sites in pPPC0006 creating pScCHSA. The
resulting plasmid will have an XhoI sites engineered into the
fusion leader sequence. The presence of the XhoI site creates a
single amino acid change in the end of fusion leader sequence from
LDKR to LEKR. The D to E change will not be present in the final
albumin fusion protein expression plasmid if one ligates into the
XhoI and Cla I sites a fragment comprising the Therapeutic moiety
which has a 5' SalI sticky end (which is compatible with the XhoI
end) and a 3' ClaI end. Ligation of the XhoI to the SalI restores
the original amino acid sequence of the Fusion leader sequence. The
Therapeutic protein moiety may be inserted after the Kex2 site
(Kex2 claeves after the dibasic amino acid sequence KR at the end
of the Fusion leader sequence) and before the ClaI site.
[0751] In addition, for the purpose of making an albumin fusion
protein where the Therapeutic moiety is placed C-terminal to the
(mature) albumin protein, four, eight-base-pair restriction sites
were added at the 3' end of the DNA encoding HA in pScCHSA. As an
example, it was felt to be desirable to incorporate AscI, FseI, and
PmeI restriction sites in between the Bsu36I and HindIII sites at
the end of the DNA encoding the HA protein in pScCHSA. This was
accomplished through the use of two complementary synthetic
oligonucleotides (SEQ ID NO:19 and SEQ ID NO:20) which contain the
desired restriction sites. [0752]
5'-AAGCTGCCTTAGGCTTATAATAAGGCGCGCCGGCCGGCCGTTTAAACTAAGCT TAATTCT-3'
(SEQ ID NO:23) and [0753]
5-AGAATTAAGCTTAGTTTAAACGGCCGGCCGGCGCGCTTATAAGCCTAAGG CAGCTT-3' (SEQ
ID NO:24). These oligonucleotides may be annealed and digested with
Bsu36I and HindIII and ligated into the same sites located at the
end of the DNA encoding the HA protein in pScCHSA creating pScNHSA,
using techniques known in the art.
Making Vectors Comprising Albumin Fusion Proteins Where the Albumin
Moiety is N-Terminal to the Therapeutic Moiety.
[0754] The DNA encoding the Therapeutic moiety may be PCR amplified
using primers that will add DNA encoding the last five amino acids
of the HA (and containing the Bsu36I site) onto the 5' end of the
DNA encoding a Therapeutic protein and a STOP codon and appropriate
cloning sites onto the 3' end of the coding sequence. For instance,
the forward primer used to amplify the DNA encoding a Therapeutic
protein might have the sequence, 5'-aagctGCCTTAGGCTTA(N).sub.15-3'
(SEQ ID NO:25) where the underlined sequence is a Bsu36I site, the
upper case nucleotides encode the last four amino acids of the
mature HA protein (ALGL), and (N).sub.15 is identical to the first
15 nucleotides encoding the Therapeutic protein of interest.
Similarly, the reverse primer used to amplify the DNA encoding a
Therapeutic protein might have the sequence,
##STR00001##
where the italicized nucleotides is a PmeI site, the double
underlined nucleotides are a FseI site, the singly underlined text
is a PmeI site, the boxed nucleotides are the reverse complement of
two tandem stop codons, and (N).sub.15 is identical to the reverse
complement of the last 15 nucleotides encoding the Therapeutic
protein of interest. Once the PCR product is amplified it may be
cut with Bsu36I and one of (AscI, FseI, or PmeI) and ligated into
pScNHSA.
Making Vectors Comprising Albumin Fusion Proteins Where the Albumin
Moiety is N-Terminal to the Therapeutic Moiety.
[0755] The DNA encoding the Therapeutic moiety may be PCR amplified
using primers that will add DNA encoding the last three amino acids
of the Fusion leader sequence (and containing a Sail site) onto the
5' end of the DNA encoding a Therapeutic protein and the first few
amino acids of the HA (and containing a ClaI site. For instance,
the forward primer used to amplify the DNA encoding a Therapeutic
protein might have the sequence, 5'-aggagcgtcGACAAAAGA(N).sub.15-3'
(SEQ ID NO:27) where the underlined sequence is a Sal I site, the
upper case nucleotides encode the last three amino acids of the
Fusion leader sequence (DKR), and (N).sub.15 is identical to the
first 15 nucleotides encoding the Therapeutic protein of interest.
Similarly, the reverse primer used to amplify the DNA encoding a
Therapeutic protein might have the sequence,
TABLE-US-00011 (SEQ ID NO: 28)
5'-CTTTAAATCGATGAGCAACCTCACTCTTGTGTGCATC(N).sub.15-3'
where the italicized nucleotides are a ClaI site, the underlined
nucleotides are the reverse complement of the DNA encoding the
first 9 amino acids of HA (DAHKSEVAH), and (N).sub.15 is identical
to the reverse complement of the last 15 nucleotides encoding the
Therapeutic protein of interest. Once the PCR product is amplified
it may be cut with SalI and ClaI and ligated into pScCHSA digested
with XhoI and Cla I.
Expression of an Albumin Fusion Protein in Yeast.
[0756] The Not I fragment containing the DNA encoding either an
N-terminal or C-terminal albumin fusion protein generated from
pScCHSA or pScNHSA may then be cloned in to the NotI site of
pSAC35.
Expression of an Albumin Fusion Protein from Mammalian Cell
Lines
[0757] The HSA gene has also been cloned into a the pC4 vector
which is more suitable for mammalian culture systems creating
plasmid pC4:HSA. More specifically, pC4HSA was generated by PCR
amplifying the mature HSA gene with a 5' primer (SEQ ID NO:30) that
anneals to the 5' end of DNA encoding the mature form of the HSA
protein (e.g, DNA in plasmid pScCHSA),incorporates BamHI (Shown in
italics below) and HindIII (shown singly underlined below) cloning
sites, attaches a kozak sequence (shown double underlined below)
and DNA encoding the natural HSA signal peptide
(MKWVSFISLLFLFSSAYSRSLDKR,
[0758] SEQ ID NO:29) (shown in bold below), and a 3' primer (SEQ ID
NO:31) that anneals to the 3' end of DNA encoding the mature form
of the HSA protein and incorporates an Asp718 restriction site
(shown in bold below). The DNA encoding the natural human serum
albumin leader sequence in SEQ ID NO:30 also contains a
modification that introduces a XhoI site that is boxed below.
##STR00002##
This PCR product (1.35 kb) is then purified and digested with BamHI
and Asp718 and cloned into the same sites in pC4 (ATCC Accession
No. 209646) to produce pC4:HSA
Making Vectors Comprising Albumin Fusion Proteins Where the Albumin
Moiety is C-Terminal to the Therapeutic Moiety Using the pC4:HSA
Vector
[0759] Using pC4:HSA, albumin fusion proteins in which the
Therapeutic protein moiety is N terminal to the albumin sequence,
one can clone DNA encoding a Therapeutic protein that has its own
signal sequence between the Barn HI (or HindIII) and ClaI sites.
When cloning into either the BamHI or Hind III site remember to
include Kozak sequence (CCGCCACCATG) prior to translational start
codon of DNA encoding the Therapeutic Protein to be subcloned. If
the Therapeutic does not have a signal sequence, the DNA encoding
that Therapeutic protein may be cloned in between the XhoI and ClaI
sites. When using the XhoI site, the following 5' (SEQ ID NO:32)
and 3' (SEQ ID NO:33) PCR primers may he used:
TABLE-US-00012 (SEQ ID NO: 32)
5'-CCGCCGCTCGAGGGGTGTGTTTCGTCGA(N).sub.18-3' (SEQ ID NO: 33)
5'-AGTCCCATCGATGAGCAACCTCACTCTTGTGTGCATC(N).sub.18-3'
[0760] In SEQ ID NO:32, the underlined sequence is an XhoI site;
and the XhoI site and the DNA following the XhoI site encode for
the last seven amino acids of the leader sequence of natural human
serum albumin. In SEQ ID NO:33, the underlined sequence is a ClaI
site; and the ClaI site and the DNA following it encode are the
reverse complement of the DNA encoding the first 10 amino acids of
the mature HSA protein (SEQ ID NO:18). In SEQ ID NO:32 "(N).sub.18"
is DNA identical to the first 18 nucleotides encoding the
Therapeutic protein of interest.). In SEQ ID NO:33 "(N).sub.18" is
the reverse complement of DNA encoding the last 18 nucleotides
encoding the Therapeutic protein of interest. Using these two
primers, one may PCR amplify the Therapeutic protein of interest,
purify the PCR product, digest it with XhoI and ClaI restriction
enzymes and then and clone it into the with XhoI and ClaI sites in
the pC4:HSA vector.
Making Vectors Comprising Albumin Fusion Proteins Where the Albumin
Moiety is N-Terminal to the Therapeutic Moiety Using the pC4:HSA
Vector
[0761] Using pC4:HSA, albumin fusion proteins in which the
Therapeutic protein moiety is N terminal to the albumin sequence,
one can clone DNA encoding a Therapeutic protein between the Bsu36I
and AscI restriction sites. When cloning into the Bsu36I and AscI,
the same primer design used to clone in the yeast vector system
(SEQ ID NO:25 and 26) may be employed.
[0762] The pC4 vector is especially suitable for expression of
albumin fusion proteins from CHO cells. For expression, in other
mammalian cell types, e.g., NSO cells, it may be useful to subclone
the HindIII-EcoRI fragment containing the DNA encoding an albumin
fusion protein (from a pC4 vector in which the DNA encoding the
Therapeutic protein has already been cloned in frame with the DNA
encoding (the mature form of) human serum albumin) into another
expression vector (such as any of the mammalian expression vectors
described herein).
Example 3
Preparation of HA-Cytokine or HA-Growth Factor Fusion Proteins
(Such as EPO, GMCSF, GCSF)
[0763] The cDNA for the cytokine or growth factor of interest, such
as EPO, can be isolated by a variety of means including from cDNA
libraries, by RT-PCR and by PCR using a series of overlapping
synthetic oligonucleotide primers, all using standard methods. The
nucleotide sequences for all of these proteins are known and
available, for instance, in U.S. Pat. Nos. 4,703,008, 4,810,643 and
5,908,763. The cDNA can be tailored at the 5' and 3' ends to
generate restriction sites, such that oligonucleotide linkers can
be used, for cloning of the cDNA into a vector containing the cDNA
for HA. This can be at the N or C-terminus with or without the use
of a spacer sequence. EPO (or other cytokine) cDNA is cloned into a
vector such as pPPC0005 (FIG. 4), pScCHSA, pScNHSA, or pC4:HSA from
which the complete expression cassette is then excised and inserted
into the plasmid pSAC35 to allow the expression of the albumin
fusion protein in yeast. The albumin fusion protein secreted from
the yeast can then be collected and purified from the media and
tested for its biological activity. For expression in mammalian
cell lines, a similar procedure is adopted except that the
expression cassette used employs a mammalian promoter, leader
sequence and terminator (See Example 2). This expression cassette
is then excised and inserted into a plasmid suitable for the
transfection of mammalian cell lines.
Example 4
Preparation of HA-IFN Fusion Proteins (Such as IFN.alpha.)
[0764] The cDNA for the interferon of interest such as IFN.alpha.
can be isolated by a variety of means including but not
exclusively, from cDNA libraries, by RT-PCR and by PCR using a
series of overlapping synthetic oligonucleotide primers, all using
standard methods. The nucleotide sequences for interferons, such as
IFN.alpha. are known and available, for instance, in U.S. Pat. Nos.
5,326,859 and 4,588,585, in EP 32 134, as well as in public
databases such as GenBank. The cDNA can be tailored at the 5' and
3' ends to generate restriction sites, such that oligonucleotide
linkers can be used to clone the cDNA into a vector containing the
cDNA for HA. This can be at the N or C-terminus of the HA sequence,
with or without the use of a spacer sequence. The IFN.alpha. (or
other interferon) cDNA is cloned into a vector such as pPPC0005
(FIG. 4), pScCHSA, pScNHSA, or pC4:HSA from which the complete
expression cassette is then excised and inserted into the plasmid
pSAC35 to allow the expression of the albumin fusion protein in
yeast (see FIG. 8). The albumin fusion protein secreted from the
yeast can then be collected and purified from the media and tested
for its biological activity. For expression in mammalian cell lines
a similar procedure is adopted except that the expression cassette
used employs a mammalian promoter, leader sequence and terminator
(See Example 2). This expression cassette is then excised and
inserted into a plasmid suitable for the transfection of mammalian
cell lines.
Maximum Protein Recovery from Vials
[0765] The albumin fusion proteins of the invention have a high
degree of stability even when they are packaged at low
concentrations. In addition, in spite of the low protein
concentration, good fusion-protein recovery is observed even when
the aqueous solution includes no other protein added to minimize
binding to the vial walls. FIG. 5 compares the recovery of
vial-stored HA-IFN solutions with a stock solution. 6 or 30
.mu.g/ml HA-IFN solutions were placed in vials and stored at
4.degree. C. After 48 or 72 hrs a volume originally equivalent to
10 ng of sample was removed and measured in an IFN sandwich ELISA.
The estimated values were compared to that of a high concentration
stock solution. As shown, there is essentially no loss of the
sample in these vials, indicating that addition of exogenous
material such as albumin is not necessary to prevent sample loss to
the wall of the vials
[0766] In vivo Stability and Bioavailability of HA-.alpha.-IFN
Fusions
[0767] To determine the in vivo stability and bioavailability of a
HA-.alpha.-IFN fusion molecule, the purified fusion molecule (from
yeast) was administered to monkeys at the dosages and time points
described in FIGS. 6 and 7. Pharmaceutical compositions formulated
from HA-.alpha.-IFN fusions may account for the extended serum
half-life and bioavailability exemplified in FIGS. 6 and 7.
Accordingly, pharmaceutical compositions may be formulated to
contain lower dosages of alpha-interferon activity compared to the
native alpha-interferon molecule.
[0768] Pharmaceutical compositions containing HA-a-IFN fusions may
be used to treat or prevent disease in patients with any disease or
disease state that can be modulated by the administration of a-IFN.
Such diseases include, but are not limited to, hairy cell leukemia,
Kaposi's sarcoma, genital and anal warts, chronic hepatitis B,
chronic non-A, non-B hepatitis, in particular hepatitis C,
hepatitis D, chronic myelogenous leukemia, renal cell carcinoma,
bladder carcinoma, ovarian and cervical carcinoma, skin cancers,
recurrent respirator papillomatosis, non-Hodgkin's and cutaneous
T-cell lymphomas, melanoma, multiple myeloma, AIDS, multiple
sclerosis, gliobastoma, etc. (see Interferon Alpha, In: AHFS Drug
Information, 1997.
[0769] Accordingly, the invention includes pharmaceutical
compositions containing a HA-.alpha.-IFN fusion protein,
polypeptide or peptide formulated with the proper dosage for human
administration. The invention also includes methods of treating
patients in need of such treatment comprising at least the step of
administering a pharmaceutical composition containing at least one
HA-a-IFN fusion protein, polypeptide or peptide.
[0770] Bifunctional HA-_-IFN Fusions
[0771] The HA-.alpha.-IFN expression vector of FIG. 8 is modified
to include an insertion for the expression of bifunctional
HA-.alpha.-IFN fusion proteins. For instance, the cDNA for a second
protein of interest may be inserted in frame downstream of the
"rHA-IFN" sequence after the double stop codon has been removed or
shifted downstream of the coding sequence.
[0772] In one version of a bifunctional HA-.alpha.-IFN fusion
protein, an antibody or fragment against B-lymphocyte stimulator
protein (GenBank Acc 4455139) or polypeptide may be fused to one
end of the HA component of the fusion molecule. This bifunctional
protein is useful for modulating any immune response generated by
the .alpha.-IFN component of the fusion.
Example 5
Preparation of HA-Hormone Fusion Protein (Such as Insulin, LH,
FSH)
[0773] The cDNA for the hormone of interest such as insulin can be
isolated by a variety of means including but not exclusively, from
cDNA libraries, by RT-PCR and by PCR using a series of overlapping
synthetic oligonucleotide primers, all using standard methods. The
nucleotide sequences for all of these proteins are known and
available, for instance, in public databases such as GenBank. The
cDNA can be tailored at the 5' and 3' ends to generate restriction
sites, such that oligonucleotide linkers can be used, for cloning
of the cDNA into a vector containing the cDNA for HA. This can be
at the N or C-terminus with or without the use of a spacer
sequence. The hormone cDNA is cloned into a vector such as pPPC0005
(FIG. 4), pScCHSA, pScNHSA, or pC4:HSA from which the complete
expression cassette is then excised and inserted into the plasmid
pSAC35 to allow the expression of the albumin fusion protein in
yeast. The albumin fusion protein secreted from the yeast can then
be collected and purified from the media and tested for its
biological activity. For expression in mammalian cell lines a
similar procedure is adopted except that the expression cassette
used employs a mammalian promoter, leader sequence and terminator
(See Example 2). This expression cassette is then excised and
inserted into a plasmid suitable for the transfection of mammalian
cell lines.
Example 6
Preparation of HA-Soluble Receptor or HA-Binding Protein Fusion
Protein Such as HA-TNF Receptor
[0774] The cDNA for the soluble receptor or binding protein of
interest such as TNF receptor can be isolated by a variety of means
including but not exclusively, from cDNA libraries, by RT-PCR and
by PCR using a series of overlapping synthetic oligonucleotide
primers, all using standard methods. The nucleotide sequences for
all of these proteins are known and available, for instance, in
GenBank. The cDNA can be tailored at the 5' and 3' ends to generate
restriction sites, such that oligonucleotide linkers can be used,
for cloning of the cDNA into a vector containing the cDNA for HA.
This can be at the N or C-terminus with or without the use of a
spacer sequence. The receptor cDNA is cloned into a vector such as
pPPC0005 (FIG. 4), pScCHSA, pScNHSA, or pC4:HSA from which the
complete expression cassette is then excised and inserted into the
plasmid pSAC35 to allow the expression of the albumin fusion
protein in yeast. The albumin fusion protein secreted from the
yeast can then be collected and purified from the media and tested
for its biological activity. For expression in mammalian cell lines
a similar procedure is adopted except that the expression cassette
used employs a mammalian promoter, leader sequence and terminator
(See Example 2). This expression cassette is then excised and
inserted into a plasmid suitable for the transfection of mammalian
cell lines.
Example 7
Preparation of HA-Growth Factors Such as HA-IGF-1 Fusion
Protein
[0775] The cDNA for the growth factor of interest such as IGF-1 can
be isolated by a variety of means including but not exclusively,
from cDNA libraries, by RT-PCR and by PCR using a series of
overlapping synthetic oligonucleotide primers, all using standard
methods (see GenBank Acc. No. NP.sub.--000609). The cDNA can be
tailored at the 5' and 3' ends to generate restriction sites, such
that oligonucleotide linkers can be used, for cloning of the cDNA
into a vector containing the cDNA for HA. This can be at the N or
C-terminus with or without the use of a spacer sequence. The growth
factor cDNA is cloned into a vector such as pPPC0005 (FIG. 4),
pScCHSA, pScNHSA, or pC4:HSA from which the complete expression
cassette is then excised and inserted into the plasmid pSAC35 to
allow the expression of the albumin fusion protein in yeast. The
albumin fusion protein secreted from the yeast can then be
collected and purified from the media and tested for its biological
activity. For expression in mammalian cell lines a similar
procedure is adopted except that the expression cassette used
employs a mammalian promoter, leader sequence and terminator (See
Example 2). This expression cassette is then excised and inserted
into a plasmid suitable for the transfection of mammalian cell
lines.
Example 8
Preparation of HA-Single Chain Antibody Fusion Proteins
[0776] Single chain antibodies are produced by several methods
including but not limited to: selection from phage libraries,
cloning of the variable region of a specific antibody by cloning
the cDNA of the antibody and using the flanking constant regions as
the primer to clone the variable region, or by synthesizing an
oligonucleotide corresponding to the variable region of any
specific antibody. The cDNA can be tailored at the 5' and 3' ends
to generate restriction sites, such that oligonucleotide linkers
can be used, for cloning of the cDNA into a vector containing the
cDNA for HA. This can be at the N or C-terminus with or without the
use of a spacer sequence. The cell cDNA is cloned into a vector
such as pPPC0005 (FIG. 4), pScCHSA, pScNHSA, or pC4:HSA from which
the complete expression cassette is then excised and inserted into
the plasmid pSAC35 to allow the expression of the albumin fusion
protein in yeast.
[0777] In fusion molecules of the invention, the V.sub.H and
V.sub.L can be linked by one of the following means or a
combination thereof: a peptide linker between the C-terminus of the
V.sub.H and the N-terminus of the V.sub.L; a Kex2p protease
cleavage site between the V.sub.H and V.sub.L such that the two are
cleaved apart upon secretion and then self associate; and cystine
residues positioned such that the V.sub.H and V.sub.L can form a
disulphide bond between them to link them together (see FIG. 14).
An alternative option would be to place the V.sub.H at the
N-terminus of HA or an HA domain fragment and the V.sub.L at the
C-terminus of the HA or HA domain fragment.
[0778] The albumin fusion protein secreted from the yeast can then
be collected and purified from the media and tested for its
activity. For expression in mammalian cell lines a similar
procedure is adopted except that the expression cassette used
employs a mammalian promoter, leader sequence and terminator (See
Example 2). This expression cassette is then excised and inserted
into a plasmid suitable for the transfection of mammalian cell
lines. The antibody produced in this manner can be purified from
media and tested for its binding to its antigen using standard
immunochemical methods.
Example 9
Preparation of HA-Cell Adhesion Molecule Fusion Proteins
[0779] The cDNA for the cell adhesion molecule of interest can be
isolated by a variety of means including but not exclusively, from
cDNA libraries, by RT-PCR and by PCR using a series of overlapping
synthetic oligonucleotide primers, all using standard methods. The
nucleotide sequences for the known cell adhesion molecules are
known and available, for instance, in GenBank. The cDNA can be
tailored at the 5' and 3' ends to generate restriction sites, such
that oligonucleotide linkers can be used, for cloning of the cDNA
into a vector containing the cDNA for HA. This can be at the N or
C-terminus with or without the use of a spacer sequence. The cell
adhesion molecule cDNA is cloned into a vector such as pPPC0005
(FIG. 4), pScCHSA, pScNHSA, or pC4:HSA from which the complete
expression cassette is then excised and inserted into the plasmid
pSAC35 to allow the expression of the albumin fusion protein in
yeast. The albumin fusion protein secreted from the yeast can then
be collected and purified from the media and tested for its
biological activity. For expression in mammalian cell lines a
similar procedure is adopted except that the expression cassette
used employs a mammalian promoter, leader sequence and terminator
(See Example 2). This expression cassette is then excised and
inserted into a plasmid suitable for the transfection of mammalian
cell lines.
Example 10
Preparation of Inhibitory Factors and peptides as HA Fusion
Proteins (Such as HA-Antiviral, HA-Antibiotic, HA-Enzyme Inhibitor
and HA-Anti-Allergic Proteins)
[0780] The cDNA for the peptide of interest such as an antibiotic
peptide can be isolated by a variety of means including but not
exclusively, from cDNA libraries, by RT-PCR and by PCR using a
series of overlapping synthetic oligonucleotide primers, all using
standard methods. The cDNA can be tailored at the 5' and 3' ends to
generate restriction sites, such that oligonucleotide linkers can
be used, for cloning of the cDNA into a vector containing the cDNA
for HA. This can be at the N or C-terminus with or without the use
of a spacer sequence. The peptide cDNA is cloned into a vector such
as pPPC0005 (FIG. 4), pScCHSA, pScNHSA, or pC4:HSA from which the
complete expression cassette is then excised and inserted into the
plasmid pSAC35 to allow the expression of the albumin fusion
protein in yeast. The albumin fusion protein secreted from the
yeast can then be collected and purified from the media and tested
for its biological activity. For expression in mammalian cell lines
a similar procedure is adopted except that the expression cassette
used employs a mammalian promoter, leader sequence and terminator
(See Example 2). This expression cassette is then excised and
inserted into a plasmid suitable for the transfection of mammalian
cell lines.
Example 11
Preparation of Targeted HA Fusion Proteins
[0781] The cDNA for the protein of interest can be isolated from
cDNA library or can be made synthetically using several overlapping
oligonucleotides using standard molecular biology methods. The
appropriate nucleotides can be engineered in the cDNA to form
convenient restriction sites and also allow the attachment of the
protein cDNA to albumin cDNA similar to the method described for
hGH. Also a targeting protein or peptide cDNA such as single chain
antibody or peptides, such as nuclear localization signals, that
can direct proteins inside the cells can be fused to the other end
of albumin. The protein of interest and the targeting peptide is
cloned into a vector such as pPPC0005 (FIG. 4), pScCHSA, pScNHSA,
or pC4:HSA which allows the fusion with albumin cDNA. In this
manner both N- and C-terminal end of albumin are fused to other
proteins. The fused cDNA is then excised from pPPC0005 and is
inserted into a plasmid such as pSAC35 to allow the expression of
the albumin fusion protein in yeast. All the above procedures can
be performed using standard methods in molecular biology. The
albumin fusion protein secreted from yeast can be collected and
purified from the media and tested for its biological activity and
its targeting activity using appropriate biochemical and biological
tests.
Example 12
Preparation of HA-Enzymes Fusions
[0782] The cDNA for the enzyme of interest can be isolated by a
variety of means including but not exclusively, from cDNA
libraries, by RT-PCR and by PCR using a series of overlapping
synthetic oligonucleotide primers, all using standard methods. The
cDNA can be tailored at the 5' and 3' ends to generate restriction
sites, such that oligonucleotide linkers can be used, for cloning
of the cDNA into a vector containing the cDNA for HA. This can be
at the N or C-terminus with or without the use of a spacer
sequence. The enzyme cDNA is cloned into a vector such as pPPC0005
(FIG. 4), pScCHSA, pScNHSA, or pC4:HSA from which the complete
expression cassette is then excised and inserted into the plasmid
pSAC35 to allow the expression of the albumin fusion protein in
yeast. The albumin fusion protein secreted from the yeast can then
be collected and purified from the media and tested for its
biological activity. For expression in mammalian cell lines a
similar procedure is adopted except that the expression cassette
used employs a mammalian promoter, leader sequence and terminator
(See Example 2). This expression cassette is then excised and
inserted into a plasmid suitable for the transfection of mammalian
cell lines.
Example 13
Bacterial Expression of an Albumin Fusion Protein
[0783] A polynucleotide encoding an albumin fusion protein of the
present invention comprising a bacterial signal sequence is
amplified using PCR oligonucleotide primers corresponding to the 5'
and 3' ends of the DNA sequence, to synthesize insertion fragments.
The primers used to amplify the polynucleotide encoding insert
should preferably contain restriction sites, such as BamHI and
XbaI, at the 5' end of the primers in order to clone the amplified
product into the expression vector. For example, BamHI and XbaI
correspond to the restriction enzyme sites on the bacterial
expression vector pQE-9. (Qiagen, Inc., Chatsworth, Calif.). This
plasmid vector encodes antibiotic resistance (Amp.sup.r), a
bacterial origin of replication (ori), an IPTG-regulatable
promoter/operator (P/O), a ribosome binding site (RBS), a
6-histidine tag (6-His), and restriction enzyme cloning sites.
[0784] The pQE-9 vector is digested with BamHI and XbaI and the
amplified fragment is ligated into the pQE-9 vector maintaining the
reading frame initiated at the bacterial RBS. The ligation mixture
is then used to transform the E. coli strain M15/rep4 (Qiagen,
Inc.) which contains multiple copies of the plasmid pREP4, which
expresses the lad repressor and also confers kanamycin resistance
(Kan.sup.r). Transformants are identified by their ability to grow
on LB plates and ampicillin/kanamycin resistant colonies are
selected. Plasmid DNA is isolated and confirmed by restriction
analysis.
[0785] Clones containing the desired constructs are grown overnight
(O/N) in liquid culture in LB media supplemented with both Amp (100
ug/ml) and Kan (25 ug/ml). The O/N culture is used to inoculate a
large culture at a ratio of 1:100 to 1:250. The cells are grown to
an optical density 600 (O.D..sup.600) of between 0.4 and 0.6. IPTG
(Isopropyl-B-D-thiogalacto pyranoside) is then added to a final
concentration of 1 mM. IPTG induces by inactivating the lacI
repressor, clearing the P/O leading to increased gene
expression.
[0786] Cells are grown for an extra 3 to 4 hours. Cells are then
harvested by centrifugation (20 mins at 6000.times.g). The cell
pellet is solubilized in the chaotropic agent 6 Molar Guanidine HCl
or preferably in 8 M urea and concentrations greater than 0.14 M
2-mercaptoethanol by stirring for 3-4 hours at 4.degree. C. (see,
e.g., Burton et al., Eur. J. Biochem. 179:379-387 (1989)). The cell
debris is removed by centrifugation, and the supernatant containing
the polypeptide is loaded onto a nickel-nitrilo-tri-acetic acid
("Ni-NTA") affinity resin column (available from QIAGEN, Inc.,
supra). Proteins with a 6.times. His tag bind to the Ni-NTA resin
with high affinity and can be purified in a simple one-step
procedure (for details see: The QIAexpressionist (1995) QIAGEN,
Inc., supra).
[0787] Briefly, the supernatant is loaded onto the column in 6 M
guanidine-HCl, pH 8. The column is first washed with 10 volumes of
6 M guanidine-HCl, pH 8, then washed with 10 volumes of 6 M
guanidine-HCl pH 6, and finally the polypeptide is eluted with 6 M
guanidine-HCl, pH 5.
[0788] The purified protein is then renatured by dialyzing it
against phosphate-buffered saline (PBS) or 50 mM Na-acetate, pH 6
buffer plus 200 mM NaCl. Alternatively, the protein can be
successfully refolded while immobilized on the Ni-NTA column.
Exemplary conditions are as follows: renature using a linear 6M-1M
urea gradient in 500 mM NaCl, 20% glycerol, 20 mM Tris/HCl pH 7.4,
containing protease inhibitors. The renaturation should be
performed over a period of 1.5 hours or more. After renaturation
the proteins are eluted by the addition of 250 mM immidazole.
Immidazole is removed by a final dialyzing step against PBS or 50
mM sodium acetate pH 6 buffer plus 200 mM NaCl. The purified
protein is stored at 4.degree. C. or frozen at -80.degree. C.
[0789] In addition to the above expression vector, the present
invention further includes an expression vector, called pHE4a (ATCC
Accession Number 209645, deposited on Feb. 25, 1998) which contains
phage operator and promoter elements operatively linked to a
polynucleotide encoding an albumin fusion protein of the present
invention, called pHE4a. (ATCC Accession Number 209645, deposited
on Feb. 25, 1998.) This vector contains: 1) a
neomycinphosphotransferase gene as a selection marker, 2) an E.
coli origin of replication, 3) a T5 phage promoter sequence, 4) two
lac operator sequences, 5) a Shine-Delgarno sequence, and 6) the
lactose operon repressor gene (lacIq). The origin of replication
(oriC) is derived from pUC19 (LTI, Gaithersburg, Md.). The promoter
and operator sequences are made synthetically.
[0790] DNA can be inserted into the pHE4a by restricting the vector
with NdeI and XbaI, BamHI, XhoI, or Asp718, running the restricted
product on a gel, and isolating the larger fragment (the stuffer
fragment should be about 310 base pairs). The DNA insert is
generated according to PCR protocols described herein or otherwise
known in the art, using PCR primers having restriction sites for
NdeI (5' primer) and XbaI, BamHI, XhoI, or Asp718 (3' primer). The
PCR insert is gel purified and restricted with compatible enzymes.
The insert and vector are ligated according to standard
protocols.
[0791] The engineered vector may be substituted in the above
protocol to express protein in a bacterial system.
Example 14
Expression of an Albumin Fusion Protein in Mammalian Cells
[0792] The albumin fusion proteins of the present invention can be
expressed in a mammalian cell. A typical mammalian expression
vector contains a promoter element, which mediates the initiation
of transcription of mRNA, a protein coding sequence, and signals
required for the termination of transcription and polyadenylation
of the transcript. Additional elements include enhancers, Kozak
sequences and intervening sequences flanked by donor and acceptor
sites for RNA splicing. Highly efficient transcription is achieved
with the early and late promoters from SV40, the long terminal
repeats (LTRs) from Retroviruses, e.g., RSV, HTLVI, HIVI and the
early promoter of the cytomegalovirus (CMV). However, cellular
elements can also be used (e.g., the human actin promoter).
[0793] Suitable expression vectors for use in practicing the
present invention include, for example, vectors such as, pSVL and
pMSG (Pharmacia, Uppsala, Sweden), pRSVcat (ATCC 37152), pSV2dhfr
(ATCC 37146), pBC12MI (ATCC 67109), pCMVSport 2.0, and pCMVSport
3.0. Mammalian host cells that could be used include, but are not
limited to, human Hela, 293, H9 and Jurkat cells, mouse NIH3T3 and
C127 cells, Cos 1, Cos 7 and CV1, quail QC1-3 cells, mouse L cells
and Chinese hamster ovary (CHO) cells.
[0794] Alternatively, the albumin fusion protein can be expressed
in stable cell lines containing the polynucleotide encoding the
albumin fusion protein integrated into a chromosome. The
co-transfection with a selectable marker such as DHFR, gpt,
neomycin, or hygromycin allows the identification and isolation of
the transfected cells.
[0795] The transfected polynucleotide encoding the fusion protein
can also be amplified to express large amounts of the encoded
fusion protein. The DHFR (dihydrofolate reductase) marker is useful
in developing cell lines that carry several hundred or even several
thousand copies of the gene of interest. (See, e.g., Alt et al., J.
Biol. Chem. 253:1357-1370 (1978); Hamlin et al., Biochem. et
Biophys. Acta, 1097:107-143 (1990); Page et al., Biotechnology
9:64-68 (1991)). Another useful selection marker is the enzyme
glutamine synthase (GS) (Murphy et al., Biochem J. 227:277-279
(1991); Bebbington et al., Bio/Technology 10:169-175 (1992). Using
these markers, the mammalian cells are grown in selective medium
and the cells with the highest resistance are selected. These cell
lines contain the amplified gene(s) integrated into a chromosome.
Chinese hamster ovary (CHO) and NSO cells are often used for the
production of proteins.
[0796] Derivatives of the plasmid pSV2-dhfr (ATCC Accession No.
37146), the expression vectors pC4 (ATCC Accession No. 209646) and
pC6 (ATCC Accession No.209647) contain the strong promoter (LTR) of
the Rous Sarcoma Virus (Cullen et al., Molecular and Cellular
Biology, 438-447 (March, 1985)) plus a fragment of the CMV-enhancer
(Boshart et al., Cell 41:521-530 (1985)). Multiple cloning sites,
e.g., with the restriction enzyme cleavage sites BamHI, XbaI and
Asp718, facilitate the cloning of the gene of interest. The vectors
also contain the 3' intron, the polyadenylation and termination
signal of the rat preproinsulin gene, and the mouse DHFR gene under
control of the SV40 early promoter.
[0797] Specifically, the plasmid pC6, for example, is digested with
appropriate restriction enzymes and then dephosphorylated using
calf intestinal phosphates by procedures known in the art. The
vector is then isolated from a 1% agarose gel.
[0798] A polynucleotide encoding an albumin fusion protein of the
present invention is generated using techniques known in the art
and this polynucleotide is amplified using PCR technology known in
the art. If a naturally occurring signal sequence is used to
produce the fusion protein of the present invention, the vector
does not need a second signal peptide. Alternatively, if a
naturally occurring signal sequence is not used, the vector can be
modified to include a heterologous signal sequence. (See, e.g.,
International Publication No. WO 96/34891.)
[0799] The amplified fragment encoding the fusion protein of the
invention is isolated from a 1% agarose gel using a commercially
available kit ("Geneclean," BIO 101 Inc., La Jolla, Calif.). The
fragment then is digested with appropriate restriction enzymes and
again purified on a 1% agarose gel.
[0800] The amplified fragment encoding the albumin fusion protein
of the invention is then digested with the same restriction enzyme
and purified on a 1% agarose gel. The isolated fragment and the
dephosphorylated vector are then ligated with T4 DNA ligase. E.
coli HB101 or XL-1 Blue cells are then transformed and bacteria are
identified that contain the fragment inserted into plasmid pC6
using, for instance, restriction enzyme analysis.
[0801] Chinese hamster ovary cells lacking an active DHFR gene is
used for transfection. Five .mu.g of the expression plasmid pC6 or
pC4 is cotransfected with 0.5 .mu.g of the plasmid pSVneo using
lipofectin (Feigner et al., supra). The plasmid pSV2-neo contains a
dominant selectable marker, the neo gene from Tn5 encoding an
enzyme that confers resistance to a group of antibiotics including
G418. The cells are seeded in alpha minus MEM supplemented with 1
mg/ml G418. After 2 days, the cells are trypsinized and seeded in
hybridoma cloning plates (Greiner, Germany) in alpha minus MEM
supplemented with 10, 25, or 50 ng/ml of methotrexate plus 1 mg/ml
G418. After about 10-14 days single clones are trypsinized and then
seeded in 6-well petri dishes or 10 ml flasks using different
concentrations of methotrexate (50 nM, 100 nM, 200 nM, 400 nM, 800
nM). Clones growing at the highest concentrations of methotrexate
are then transferred to new 6-well plates containing even higher
concentrations of methotrexate (1 .mu.M, 2 .mu.M, 5 .mu.M, 10 mM,
20 mM). The same procedure is repeated until clones are obtained
which grow at a concentration of 100-200 .mu.M. Expression of the
desired fusion protein is analyzed, for instance, by SDS-PAGE and
Western blot or by reversed phase HPLC analysis.
Example 15
Multifusion Fusions
[0802] The albumin fusion proteins (e.g,. containing a Therapeutic
protein (or fragment or variant thereof) fused to albumin (or a
fragment or variant thereof)) may additionally be fused to other
proteins to generate "multifusion proteins". These multifusion
proteins can be used for a variety of applications. For example,
fusion of the albumin fusion proteins of the invention to His-tag,
HA-tag, protein A, IgG domains, and maltose binding protein
facilitates purification. (See e.g,. EPA 394,827; Traunecker et
al., Nature 331:84-86 (1988)). Nuclear localization signals fused
to the polypeptides of the present invention can target the protein
to a specific subcellular localization, while covalent heterodimer
or homodimers can increase or decrease the activity of an albumin
fusion protein. Furthermore, the fusion of additional protein
sequences to the albumin fusion proteins of the invention may
further increase the solubility and/or stability of the fusion
protein. The fusion proteins described above can be made using or
routinely modifying techniques known in the art and/or by modifying
the following protocol, which outlines the fusion of a polypeptide
to an IgG molecule.
[0803] Briefly, the human Fc portion of the IgG molecule can be PCR
amplified, using primers that span the 5' and 3' ends of the
sequence described below. These primers also should have convenient
restriction enzyme sites that will facilitate cloning into an
expression vector, preferably a mammalian or yeast expression
vector.
[0804] For example, if pC4 (ATCC Accession No. 209646) is used, the
human Fc portion can be ligated into the BamHI cloning site. Note
that the 3' BamHI site should be destroyed. Next, the vector
containing the human Fc portion is re-restricted with BamHI,
linearizing the vector, and a polynucleotide encoding an albumin
fusion protein of the present invention (generateed and isolated
using techniques known in the art), is ligated into this BamHI
site. Note that the polynucleotide encoding the fusion protein of
the invention is cloned without a stop codon, otherwise a Fc
containing fusion protein will not be produced.
[0805] If the naturally occurring signal sequence is used to
produce the albumin fusion protein of the present invention, pC4
does not need a second signal peptide. Alternatively, if the
naturally occurring signal sequence is not used, the vector can be
modified to include a heterologous signal sequence. (See, e.g.,
International Publication No. WO 96/34891.)
TABLE-US-00013 Human IgG Fc region: (SEQ ID NO: 36)
GGGATCCGGAGCCCAAATCTTCTGACAAAACTCACACATGCCCACCGTGC
CCAGCACCTGAATTCGAGGGTGCACCGTCAGTCTTCCTCTTCCCCCCAAA
ACCCAAGGACACCCTCATGATCTCCCGGACTCCTGAGGTCACATGCGTGG
TGGTGGACGTAAGCCACGAAGACCCTGAGGTCAAGTTCAACTGGTACGTG
GACGGCGTGGAGGTGCATAATGCCAAGACAAAGCCGCGGGAGGAGCAGTA
CAACAGCACGTACCGTGTGGTCAGCGTCCTCACCGTCCTGCACCAGGACT
GGCTGAATGGCAAGGAGTACAAGTGCAAGGTCTCCAACAAAGCCCTCCCA
ACCCCCATCGAGAAAACCATCTCCAAAGCCAAAGGGCAGCCCCGAGAACC
ACAGGTGTACACCCTGCCCCCATCCCGGGATGAGCTGACCAAGAACCAGG
TCAGCCTGACCTGCCTGGTCAAAGGCTTCTATCCAAGCGACATCGCCGTG
GAGTGGGAGAGCAATGGGCAGCCGGAGAACAACTACAAGACCACGCCTCC
CGTGCTGGACTCCGACGGCTCCTTCTTCCTCTACAGCAAGCTCACCGTGG
ACAAGAGCAGGTGGCAGCAGGGGAACGTCTTCTCATGCTCCGTGATGCAT
GAGGCTCTGCACAACCACTACACGCAGAAGAGCCTCTCCCTGTCTCCGGG
TAAATGAGTGCGACGGCCGCGACTGTAGAGGAT
Example 16
Production of an Antibody from an Albumin Fusion Protein
[0806] a) Hybridoma Technology
[0807] Antibodies that bind the albumin fusion proteins of the
present invention and portions of the albumin fusion proteins of
the present invention (e.g., the Therapeutic protein portion or
albumin portion of the fusion protein) can be prepared by a variety
of methods. (See, Current Protocols, Chapter 2.) As one example of
such methods, a preparation of an albumin fusion protein of the
invention or a portion of an albumin fusion protein of the
invention is prepared and purified to render it substantially free
of natural contaminants. Such a preparation is then introduced into
an animal in order to produce polyclonal antisera of greater
specific activity.
[0808] Monoclonal antibodies specific for an albumin fusion protein
of the invention, or a portion of an albumin fusion protein of the
invention, are prepared using hybridoma technology (Kohler et al.,
Nature 256:495 (1975); Kohler et al., Eur. J. Immunol. 6:511
(1976); Kohler et al., Eur. J. Immunol. 6:292 (1976); Hammerling et
al., in: Monoclonal Antibodies and T-Cell Hybridomas, Elsevier,
N.Y., pp. 563-681 (1981)). In general, an animal (preferably a
mouse) is immunized with an albumin fusion protein of the
invention, or a portion of an albumin fusion protein of the
invention. The splenocytes of such mice are extracted and fused
with a suitable myeloma cell line. Any suitable myeloma cell line
may be employed in accordance with the present invention; however,
it is preferable to employ the parent myeloma cell line (SP2O),
available from the ATCC. After fusion, the resulting hybridoma
cells are selectively maintained in HAT medium, and then cloned by
limiting dilution as described by Wands et al. (Gastroenterology
80:225-232 (1981)). The hybridoma cells obtained through such a
selection are then assayed to identify clones which secrete
antibodies capable of binding an albumin fusion protein of the
invention, or a portion of an albumin fusion protein of the
invention.
[0809] Alternatively, additional antibodies capable of binding to
an albumin fusion protein of the invention, or a portion of an
albumin fusion protein of the invention can be produced in a
two-step procedure using anti-idiotypic antibodies. Such a method
makes use of the fact that antibodies are themselves antigens, and
therefore, it is possible to obtain an antibody which binds to a
second antibody. In accordance with this method, protein specific
antibodies are used to immunize an animal, preferably a mouse. The
splenocytes of such an animal are then used to produce hybridoma
cells, and the hybridoma cells are screened to identify clones
which produce an antibody whose ability to bind to the an albumin
fusion protein of the invention (or portion of an albumin fusion
protein of the invention)-specific antibody can be blocked by the
fusion protein of the invention, or a portion of an albumin fusion
protein of the invention. Such antibodies comprise anti-idiotypic
antibodies to the fusion protein of the invention (or portion of an
albumin fusion protein of the invention)-specific antibody and are
used to immunize an animal to induce formation of further fusion
protein of the invention (or portion of an albumin fusion protein
of the invention)-specific antibodies.
[0810] For in vivo use of antibodies in humans, an antibody is
"humanized". Such antibodies can be produced using genetic
constructs derived from hybridoma cells producing the monoclonal
antibodies described above. Methods for producing chimeric and
humanized antibodies are known in the art and are discussed herein.
(See, for review, Morrison, Science 229:1202 (1985); Oi et al.,
BioTechniques 4:214 (1986); Cabilly et al., U.S. Pat. No.
4,816,567; Taniguchi et al., EP 171496; Morrison et al., EP 173494;
Neuberger et al., WO 8601533; Robinson et al., International
Publication No. WO 8702671; Boulianne et al., Nature 312:643
(1984); Neuberger et al., Nature 314:268 (1985)).
[0811] b) Isolation of Antibody Fragments Directed Against an
Albumin Fusion Protein of the Invention, or a Portion of an Albumin
Fusion Protein of the Invention from a Library of scFvs
[0812] Naturally occurring V-genes isolated from human PBLs are
constructed into a library of antibody fragments which contain
reactivities against an albumin fusion protein of the invention, or
a portion of an albumin fusion protein of the invention, to which
the donor may or may not have been exposed (see e.g., U.S. Pat. No.
5,885,793 incorporated herein by reference in its entirety).
[0813] Rescue of the Library. A library of scFvs is constructed
from the RNA of human PBLs as described in International
Publication No. WO 92/01047. To rescue phage displaying antibody
fragments, approximately 10.sup.9 E. coli harboring the phagemid
are used to inoculate 50 ml of 2.times.TY containing 1% glucose and
100 .mu.g/ml of ampicillin (2.times.TY-AMP-GLU) and grown to an
O.D. of 0.8 with shaking. Five ml of this culture is used to
inoculate 50 ml of 2.times.TY-AMP-GLU, 2.times.108 TU of delta gene
3 helper (M13 delta gene III, see International Publication No. WO
92/01047) are added and the culture incubated at 37.degree. C. for
45 minutes without shaking and then at 37.degree. C. for 45 minutes
with shaking. The culture is centrifuged at 4000 r.p.m. for 10 min.
and the pellet resuspended in 2 liters of 2.times.TY containing 100
.mu.g/ml ampicillin and 50 ug/ml kanamycin and grown overnight.
Phage are prepared as described in International Publication No. WO
92/01047.
[0814] M13 delta gene III is prepared as follows: M13 delta gene
III helper phage does not encode gene III protein, hence the
phage(mid) displaying antibody fragments have a greater avidity of
binding to antigen. Infectious M13 delta gene III particles are
made by growing the helper phage in cells harboring a pUC19
derivative supplying the wild type gene III protein during phage
morphogenesis. The culture is incubated for 1 hour at 37.degree. C.
without shaking and then for a further hour at 37.degree. C. with
shaking. Cells are spun down (IEC-Centra 8,400 r.p.m. for 10 min),
resuspended in 300 ml 2.times.TY broth containing 100 .mu.g
ampicillin/ml and 25 .mu.g kanamycin/ml (2.times.TY-AMP-KAN) and
grown overnight, shaking at 37.degree. C. Phage particles are
purified and concentrated from the culture medium by two
PEG-precipitations (Sambrook et al., 1990), resuspended in 2 nil
PBS and passed through a 0.45 .mu.m filter (Minisart NML;
Sartorius) to give a final concentration of approximately 10.sup.13
transducing units/ml (ampicillin-resistant clones).
[0815] Panning of the Library. Immunotubes (Nunc) are coated
overnight in PBS with 4 ml of either 100 .mu.g/ml or 10 .mu.g/ml of
an albumin fusion protein of the invention, or a portion of an
albumin fusion protein of the invention. Tubes are blocked with 2%
Marvel-PBS for 2 hours at 37.degree. C. and then washed 3 times in
PBS. Approximately 10.sup.13 TU of phage is applied to the tube and
incubated for 30 minutes at room temperature tumbling on an over
and under turntable and then left to stand for another 1.5 hours.
Tubes are washed 10 times with PBS 0.1% Tween-20 and 10 times with
PBS. Phage are eluted by adding 1 ml of 100 mM triethylamine and
rotating 15 minutes on an under and over turntable after which the
solution is immediately neutralized with 0.5 ml of 1.0M Tris-HCl,
pH 7.4. Phage are then used to infect 10 ml of mid-log E. coli TG1
by incubating eluted phage with bacteria for 30 minutes at
37.degree. C. The E. coli are then plated on TYE plates containing
1% glucose and 100 .mu.g/ml ampicillin. The resulting bacterial
library is then rescued with delta gene 3 helper phage as described
above to prepare phage for a subsequent round of selection. This
process is then repeated for a total of 4 rounds of affinity
purification with tube-washing increased to 20 times with PBS, 0.1%
Tween-20 and 20 times with PBS for rounds 3 and 4.
[0816] Characterization of Binders. Eluted phage from the 3rd and
4th rounds of selection are used to infect E. coli HB 2151 and
soluble scFv is produced (Marks, et al., 1991) from single colonies
for assay. ELISAs are performed with microtitre plates coated with
either 10 pg/ml of an albumin fusion protein of the invention, or a
portion of an albumin fusion protein of the invention, in 50 mM
bicarbonate pH 9.6. Clones positive in ELISA are further
characterized by PCR fingerprinting (see, e.g., International
Publication No. WO 92/01047) and then by sequencing. These ELISA
positive clones may also be further characterized by techniques
known in the art, such as, for example, epitope mapping, binding
affinity, receptor signal transduction, ability to block or
competitively inhibit antibody/antigen binding, and competitive
agonistic or antagonistic activity.
Example 17
Method of Treatment Using, Gene Therapy-Ex Vivo
[0817] One method of gene therapy transplants fibroblasts, which
are capable of expressing an albumin fusion protein of the present
invention, onto a patient. Generally, fibroblasts are obtained from
a subject by skin biopsy. The resulting tissue is placed in
tissue-culture medium and separated into small pieces. Small chunks
of the tissue are placed on a wet surface of a tissue culture
flask, approximately ten pieces are placed in each flask. The flask
is turned upside down, closed tight and left at room temperature
over night. After 24 hours at room temperature, the flask is
inverted and the chunks of tissue remain fixed to the bottom of the
flask and fresh media (e.g., Ham's F12 media, with 10% FBS,
penicillin and streptomycin) is added. The flasks are then
incubated at 37 degree C. for approximately one week.
[0818] At this time, fresh media is added and subsequently changed
every several days. After an additional two weeks in culture, a
monolayer of fibroblasts emerge. The monolayer is trypsinized and
scaled into larger flasks.
[0819] pMV-7 (Kirschmeier, P. T. et al., DNA, 7:219-25 (1988)),
flanked by the long terminal repeats of the Moloney murine sarcoma
virus, is digested with EcoRI and HindIII and subsequently treated
with calf intestinal phosphatase. The linear vector is fractionated
on agarose gel and purified, using glass beads.
[0820] Polynucleotides encoding an albumin fusion protein of the
invention can be generated using techniques known in the art
amplified using PCR primers which correspond to the 5' and 3' end
sequences and optionally having appropriate restriction sites and
initiation/stop codons, if necessary. Preferably, the 5' primer
contains an EcoRI site and the 3' primer includes a HindIII site.
Equal quantities of the Moloney murine sarcoma virus linear
backbone and the amplified EcoRI and HindIII fragment are added
together, in the presence of T4 DNA ligase. The resulting mixture
is maintained under conditions appropriate for ligation of the two
fragments. The ligation mixture is then used to transform bacteria
HB101, which are then plated onto agar containing kanamycin for the
purpose of confirming that the vector has the gene of interest
properly inserted.
[0821] The amphotropic pA317 or GP+am12 packaging cells are grown
in tissue culture to confluent density in Dulbecco's Modified
Eagles Medium (DMEM) with 10% calf serum (CS), penicillin and
streptomycin. The MSV vector containing the gene is then added to
the media and the packaging cells transduced with the vector. The
packaging cells now produce infectious viral particles containing
the gene (the packaging cells are now referred to as producer
cells).
[0822] Fresh media is added to the transduced producer cells, and
subsequently, the media is harvested from a 10 cm plate of
confluent producer cells. The spent media, containing the
infectious viral particles, is filtered through a millipore filter
to remove detached producer cells and this media is then used to
infect fibroblast cells. Media is removed from a sub-confluent
plate of fibroblasts and quickly replaced with the media from the
producer cells. This media is removed and replaced with fresh
media. If the titer of virus is high, then virtually all
fibroblasts will be infected and no selection is required. If the
titer is very low, then it is necessary to use a retroviral vector
that has a selectable marker, such as neo or his. Once the
fibroblasts have been efficiently infected, the fibroblasts are
analyzed to determine whether the albumin fusion protein is
produced.
[0823] The engineered fibroblasts are then transplanted onto the
host, either alone or after having been grown to confluence on
cytodex 3 microcarrier beads.
Example 18
Method of Treatment Using Gene Therapy--In Vivo
[0824] Another aspect of the present invention is using in vivo
gene therapy methods to treat disorders, diseases and conditions.
The gene therapy method relates to the introduction of naked
nucleic acid (DNA, RNA, and antisense DNA or RNA) sequences
encoding an albumin fusion protein of the invention into an animal.
Polynucleotides encoding albumin fusion proteins of the present
invention may be operatively linked to (i.e., associated with) a
promoter or any other genetic elements necessary for the expression
of the polypeptide by the target tissue. Such gene therapy and
delivery techniques and methods are known in the art, see, for
example, WO90/11092, WO98/11779; U.S. Pat. No. 5,693,622,
5,705,151, 5,580,859; Tabata et al., Cardiovasc. Res. 35(3):470-479
(1997); Chao et al., Pharmacol. Res. 35(6):517-522 (1997); Wolff,
Neuromuscul. Disord. 7(5):314-318 (1997); Schwartz et al., Gene
Ther. 3(5):405-411 (1996); Tsurumi et al., Circulation
94(12):3281-3290 (1996) (incorporated herein by reference).
[0825] The polynucleotide constructs may be delivered by any method
that delivers injectable materials to the cells of an animal, such
as, injection into the interstitial space of tissues (heart,
muscle, skin, lung, liver, intestine and the like). The
polynucleotide constructs can be delivered in a pharmaceutically
acceptable liquid or aqueous carrier.
[0826] The term "naked" polynucleotide, DNA or RNA, refers to
sequences that are free from any delivery vehicle that acts to
assist, promote, or facilitate entry into the cell, including viral
sequences, viral particles, liposome formulations, lipofectin or
precipitating agents and the like. However, polynucleotides
encoding albumin fusion proteins of the present invention may also
be delivered in liposome formulations (such as those taught in
Feigner P. L. et al. (1995) Ann. NY Acad. Sci. 772:126-139 and
Abdallah B. et al. (1995) Biol. Cell 85(1):1-7) which can be
prepared by methods well known to those skilled in the art.
[0827] The polynucleotide vector constructs used in the gene
therapy method are preferably constructs that will not integrate
into the host genome nor will they contain sequences that allow for
replication. Any strong promoter known to those skilled in the art
can be used for driving the expression of DNA. Unlike other gene
therapy techniques, one major advantage of introducing naked
nucleic acid sequences into target cells is the transitory nature
of the polynucleotide synthesis in the cells. Studies have shown
that non-replicating DNA sequences can be introduced into cells to
provide production of the desired polypeptide for periods of up to
six months.
[0828] The polynucleotide construct can be delivered to the
interstitial space of tissues within an animal, including muscle,
skin, brain, lung, liver, spleen, bone marrow, thymus, heart,
lymph, blood, bone, cartilage, pancreas, kidney, gall bladder,
stomach, intestine, testis, ovary, uterus, rectum, nervous system,
eye, gland, and connective tissue. Interstitial space of the
tissues comprises the intercellular fluid, mucopolysaccharide
matrix among the reticular fibers of organ tissues, elastic fibers
in the walls of vessels or chambers, collagen fibers of fibrous
tissues, or that same matrix within connective tissue ensheathing
muscle cells or in the lacunae of bone. It is similarly the space
occupied by the plasma of the circulation and the lymph fluid of
the lymphatic channels. Delivery to the interstitial space of
muscle tissue is preferred for the reasons discussed below. They
may be conveniently delivered by injection into the tissues
comprising these cells. They are preferably delivered to and
expressed in persistent, non-dividing cells which are
differentiated, although delivery and expression may be achieved in
non-differentiated or less completely differentiated cells, such
as, for example, stem cells of blood or skin fibroblasts. In vivo
muscle cells are particularly competent in their ability to take up
and express polynucleotides.
[0829] For the naked polynucleotide injection, an effective dosage
amount of DNA or RNA will be in the range of from about 0.05 g/kg
body weight to about 50 mg/kg body weight. Preferably the dosage
will be from about 0.005 mg/kg to about 20 mg/kg and more
preferably from about 0.05 mg/kg to about 5 mg/kg. Of course, as
the artisan of ordinary skill will appreciate, this dosage will
vary according to the tissue site of injection. The appropriate and
effective dosage of nucleic acid sequence can readily be determined
by those of ordinary skill in the art and may depend on the
condition being treated and the route of administration. The
preferred route of administration is by the parenteral route of
injection into the interstitial space of tissues. However, other
parenteral routes may also be used, such as, inhalation of an
aerosol formulation particularly for delivery to lungs or bronchial
tissues, throat or mucous membranes of the nose. In addition, naked
polynucleotide constructs can be delivered to arteries during
angioplasty by the catheter used in the procedure.
[0830] The dose response effects of injected polynucleotide in
muscle in vivo is determined as follows. Suitable template DNA for
production of mRNA coding for polypeptide of the present invention
is prepared in accordance with a standard recombinant DNA
methodology. The template DNA, which may be either circular or
linear, is either used as naked DNA or complexed with liposomes.
The quadriceps muscles of mice are then injected with various
amounts of the template DNA.
[0831] Five to six week old female and male Balb/C mice are
anesthetized by intraperitoneal injection with 0.3 ml of 2.5%
Avertin. A 1.5 cm incision is made on the anterior thigh, and the
quadriceps muscle is directly visualized. The template DNA is
injected in 0.1 ml of carrier in a 1 cc syringe through a 27 gauge
needle over one minute, approximately 0.5 cm from the distal
insertion site of the muscle into the knee and about 0.2 cm deep. A
suture is placed over the injection site for future localization,
and the skin is closed with stainless steel clips.
[0832] After an appropriate incubation time (e.g., 7 days) muscle
extracts are prepared by excising the entire quadriceps. Every
fifth 15 um cross-section of the individual quadriceps muscles is
histochemically stained for protein expression. A time course for
fusion protein expression may be done in a similar fashion except
that quadriceps from different mice are harvested at different
times. Persistence of DNA in muscle following injection may be
determined by Southern blot analysis after preparing total cellular
DNA and HIRT supernatants from injected and control mice. The
results of the above experimentation in mice can be used to
extrapolate proper dosages and other treatment parameters in humans
and other animals using naked DNA.
Example 19
Transgenic Animals
[0833] The albumin fusion proteins of the invention can also be
expressed in transgenic animals. Animals of any species, including,
but not limited to, mice, rats, rabbits, hamsters, guinea pigs,
pigs, micro-pigs, goats, sheep, cows and non-human primates, e.g.,
baboons, monkeys, and chimpanzees may be used to generate
transgenic animals. In a specific embodiment, techniques described
herein or otherwise known in the art, are used to express fusion
proteins of the invention in humans, as part of a gene therapy
protocol.
[0834] Any technique known in the art may be used to introduce the
polynucleotides encoding the albumin fusion proteins of the
invention into animals to produce the founder lines of transgenic
animals. Such techniques include, but are not limited to,
pronuclear microinjection (Paterson et al., Appl. Microbiol.
Biotechnol. 40:691-698 (1994); Carver et al., Biotechnology (NY)
11:1263-1270 (1993); Wright et al., Biotechnology (NY) 9:830-834
(1991); and Hoppe et al., U.S. Pat. No. 4,873,191 (1989));
retrovirus mediated gene transfer into germ lines (Van der Putten
et al., Proc. Natl. Acad. Sci., USA 82:6148-6152 (1985)),
blastocysts or embryos; gene targeting in embryonic stem cells
(Thompson et al., Cell 56:313-321 (1989)); electroporation of cells
or embryos (Lo, 1983, Mol Cell. Biol. 3:1803-1814 (1983));
introduction of the polynucleotides of the invention using a gene
gun (see, e.g., Ulmer et al., Science 259:1745 (1993); introducing
nucleic acid constructs into embryonic pleuripotent stem cells and
transferring the stem cells back into the blastocyst; and
sperm-mediated gene transfer (Lavitrano et al., Cell 57:717-723
(1989); etc. For a review of such techniques, see Gordon,
"Transgenic Animals," Intl. Rev. Cytol. 115:171-229 (1989), which
is incorporated by reference herein in its entirety.
[0835] Any technique known in the art may be used to produce
transgenic clones containing polynucleotides encoding albumin
fusion proteins of the invention, for example, nuclear transfer
into enucleated oocytes of nuclei from cultured embryonic, fetal,
or adult cells induced to quiescence (Campell et al., Nature
380:64-66 (1996); Wilmut et al., Nature 385:810-813 (1997)).
[0836] The present invention provides for transgenic animals that
carry the polynucleotides encoding the albumin fusion proteins of
the invention in all their cells, as well as animals which carry
these polynucleotides in some, but not all their cells, i.e.,
mosaic animals or chimeric. The transgene may be integrated as a
single transgene or as multiple copies such as in concatamers,
e.g., head-to-head tandems or head-to-tail tandems. The transgene
may also be selectively introduced into and activated in a
particular cell type by following, for example, the teaching of
Lasko et al. (Lasko et al., Proc. Natl. Acad. Sci. USA 89:6232-6236
(1992)). The regulatory sequences required for such a cell-type
specific activation will depend upon the particular cell type of
interest, and will be apparent to those of skill in the art. When
it is desired that the polynucleotide encoding the fusion protein
of the invention be integrated into the chromosomal site of the
endogenous gene corresponding to the Therapeutic protein portion or
ablumin portion of the fusion protein of the invention, gene
targeting is preferred. Briefly, when such a technique is to be
utilized, vectors containing some nucleotide sequences homologous
to the endogenous gene are designed for the purpose of integrating,
via homologous recombination with chromosomal sequences, into and
disrupting the function of the nucleotide sequence of the
endogenous gene. The transgene may also be selectively introduced
into a particular cell type, thus inactivating the endogenous gene
in only that cell type, by following, for example, the teaching of
Gu et al. (Gu et al., Science 265:103-106 (1994)). The regulatory
sequences required for such a cell-type specific inactivation will
depend upon the particular cell type of interest, and will be
apparent to those of skill in the art.
[0837] Once transgenic animals have been generated, the expression
of the recombinant gene may be assayed utilizing standard
techniques. Initial screening may be accomplished by Southern blot
analysis or PCR techniques to analyze animal tissues to verify that
integration of the polynucleotide encoding the fsuion protien of
the invention has taken place. The level of mRNA expression of the
polynucleotide encoding the fusion protein of the invention in the
tissues of the transgenic animals may also be assessed using
techniques which include, but are not limited to, Northern blot
analysis of tissue samples obtained from the animal, in situ
hybridization analysis, and reverse transcriptase-PCR (rt-PCR).
Samples of fusion protein-expressing tissue may also be evaluated
immunocytochemically or immunohistochemically using antibodies
specific for the fusion protein.
[0838] Once the founder animals are produced, they may be bred,
inbred, outbred, or crossbred to produce colonies of the particular
animal. Examples of such breeding strategies include, but are not
limited to: outbreeding of founder animals with more than one
integration site in order to establish separate lines; inbreeding
of separate lines in order to produce compound transgenics that
express the transgene at higher levels because of the effects of
additive expression of each transgene; crossing of heterozygous
transgenic animals to produce animals homozygous for a given
integration site in order to both augment expression and eliminate
the need for screening of animals by DNA analysis; crossing of
separate homozygous lines to produce compound heterozygous or
homozygous lines; and breeding to place the transgene (i.e.,
polynucleotide encoding an albumin fusion protein of the invention)
on a distinct background that is appropriate for an experimental
model of interest.
[0839] Transgenic animals of the invention have uses which include,
but are not limited to, animal model systems useful in elaborating
the biological function of fusion proteins of the invention and the
Therapeutic protein and/or albumin component of the fusion protein
of the invention, studying conditions and/or disorders associated
with aberrant expression, and in screening for compounds effective
in ameliorating such conditions and/or disorders.
Example 20
Assays Detecting Stimulation or Inhibition of B cell Proliferation
and Differentiation
[0840] Generation of functional humoral immune responses requires
both soluble and cognate signaling between B-lineage cells and
their microenvironment. Signals may impart a positive stimulus that
allows a B-lineage cell to continue its programmed development, or
a negative stimulus that instructs the cell to arrest its current
developmental pathway. To date, numerous stimulatory and inhibitory
signals have been found to influence B cell responsiveness
including IL-2, IL-4, IL-5, IL-6, IL-7, IL10, IL-13, IL-14 and
IL-15. Interestingly, these signals are by themselves weak
effectors but can, in combination with various co-stimulatory
proteins, induce activation, proliferation, differentiation,
homing, tolerance and death among B cell populations.
[0841] One of the best studied classes of B-cell co-stimulatory
proteins is the TNF-superfamily. Within this family CD40, CD27, and
CD30 along with their respective ligands CD154, CD70, and CD153
have been found to regulate a variety of immune responses. Assays
which allow for the detection and/or observation of the
proliferation and differentiation of these B-cell populations and
their precursors are valuable tools in determining the effects
various proteins may have on these B-cell populations in terms of
proliferation and differentiation. Listed below are two assays
designed to allow for the detection of the differentiation,
proliferation, or inhibition of B-cell populations and their
precursors.
[0842] In Vitro Assay--Albumin fusion proteins of the invention
(including fusion proteins containing fragments or variants of
Therapeutic proteins and/or albumin or fragments or variants of
albumin) can be assessed for its ability to induce activation,
proliferation, differentiation or inhibition and/or death in B-cell
populations and their precursors. The activity of an albumin fusion
protein of the invention on purified human tonsillar B cells,
measured qualitatively over the dose range from 0.1 to 10,000
ng/mL, is assessed in a standard B-lymphocyte co-stimulation assay
in which purified tonsillar B cells are cultured in the presence of
either foi mann-fixed Staphylococcus aureus Cowan I (SAC) or
immobilized anti-human IgM antibody as the priming agent. Second
signals such as IL-2 and IL-15 synergize with SAC and IgM
crosslinking to elicit B cell proliferation as measured by
tritiated-thymidine incorporation. Novel synergizing agents can be
readily identified using this assay. The assay involves isolating
human tonsillar B cells by magnetic bead (MACS) depletion of
CD3-positive cells. The resulting cell population is greater than
95% B cells as assessed by expression of CD45R(B220).
[0843] Various dilutions of each sample are placed into individual
wells of a 96-well plate to which are added 10.sup.5 B-cells
suspended in culture medium (RPMI 1640 containing 10% FBS,
5.times.10.sup.-5M 2ME, 100 U/ml penicillin, 10 ug/m1 streptomycin,
and 10.sup.-5 dilution of SAC) in a total volume of 150 ul.
Proliferation or inhibition is quantitated by a 20 h pulse (1
uCi/well) with 3H-thymidine (6.7 Ci/mM) beginning 72 h post factor
addition. The positive and negative controls are IL2 and medium
respectively.
[0844] In vivo Assay--BALB/c mice are injected (i.p.) twice per day
with buffer only, or 2 mg/Kg of an albumin fusion protein of the
invention (including fusion proteins containing fragments or
variants of Therapeutic proteins and/or albumin or fragments or
variants of albumin). Mice receive this treatment for 4 consecutive
days, at which time they are sacrificed and various tissues and
serum collected for analyses. Comparison of H&E sections from
normal spleens and spleens treated with the albumin fusion protein
of the invention identify the results of the activity of the fusion
protein on spleen cells, such as the diffusion of peri-arterial
lymphatic sheaths, and/or significant increases in the nucleated
cellularity of the red pulp regions, which may indicate the
activation of the differentiation and proliferation of B-cell
populations. Immunohistochemical studies using a B cell marker,
anti-CD45R(B220), are used to determine whether any physiological
changes to splenic cells, such as splenic disorganization, are due
to increased B-cell representation within loosely defined B-cell
zones that infiltrate established T-cell regions.
[0845] Flow cytometric analyses of the spleens from mice treated
with the albumin fusion protein is used to indicate whether the
albumin fusion protein specifically increases the proportion of
ThB+, CD45R(B220)dull B cells over that which is observed in
control mice.
[0846] Likewise, a predicted consequence of increased mature B-cell
representation in vivo is a relative increase in serum Ig titers.
Accordingly, serum IgM and IgA levels are compared between buffer
and fusion protein treated mice.
[0847] The studies described in this example tested activity of
fusion proteins of the invention. However, one skilled in the art
could easily modify the exemplified studies to test the activity of
fusion proteins and polynucleotides of the invention (e.g., gene
therapy).
Example 21
T Cell Proliferation Assay
[0848] A CD3-induced proliferation assay is performed on PBMCs and
is measured by the uptake of .sup.3H-thymidine. The assay is
performed as follows. Ninety-six well plates are coated with 100
.mu.l/well of mAb to CD3 (HIT3a, Pharmingen) or isotype-matched
control mAb (B33.1) overnight at 4 degrees C. (1 .mu.g/ml in 0.05M
bicarbonate buffer, pH 9.5), then washed three times with PBS. PBMC
are isolated by F/H gradient centrifugation from human peripheral
blood and added to quadruplicate wells (5.times.10.sup.4/well) of
mAb coated plates in RPMI containing 10% FCS and P/S in the
presence of varying concentrations of an albumin fusion protein of
the invention (including fusion proteins containing fragments or
variants of Therapeutic proteins and/or albumin or fragments or
variants of albumin) (total volume 200 ul). Relevant protein buffer
and medium alone are controls. After 48 hr. culture at 37 degrees
C., plates are spun for 2 min. at 1000 rpm and 100 .mu.l of
supernatant is removed and stored -20 degrees C. for measurement of
IL-2 (or other cytokines) if effect on proliferation is observed.
Wells are supplemented with 100 ul of medium containing 0.5 uCi of
.sup.3H-thymidine and cultured at 37 degrees C. for 18-24 hr. Wells
are harvested and incorporation of .sup.3H-thymidine used as a
measure of proliferation. Anti-CD3 alone is the positive control
for proliferation. IL-2 (100 U/ml) is also used as a control which
enhances proliferation. Control antibody which does not induce
proliferation of T cells is used as the negative control for the
effects of fusion proteins of the invention.
[0849] The studies described in this example tested activity of
fusion proteins of the invention. However, one skilled in the art
could easily modify the exemplified studies to test the activity of
fusion proteins or polynucleotides of the invention (e.g., gene
therapy).
Example 22
Effect of Fusion Proteins of the Invention on the Expression of MHC
Class II, Costimulatory and Adhesion Molecules and Cell
Differentiation of Monocytes and Monocyte-Derived Human Dendritic
Cells
[0850] Dendritic cells are generated by the expansion of
proliferating precursors found in the peripheral blood: adherent
PBMC or elutriated monocytic fractions are cultured for 7-10 days
with GM-CSF (50 ng/ml) and IL-4 (20 ng/ml). These dendritic cells
have the characteristic phenotype of immature cells (expression of
CD1, CD80, CD86, CD40 and MHC class II antigens). Treatment with
activating factors, such as TNF-.alpha., causes a rapid change in
surface phenotype (increased expression of MHC class I and II,
costimulatory and adhesion molecules, downregulation of
FC.gamma.RII, upregulation of CD83). These changes correlate with
increased antigen-presenting capacity and with functional
maturation of the dendritic cells.
[0851] FACS analysis of surface antigens is performed as follows.
Cells are treated 1-3 days with increasing concentrations of an
albumin fusion protein of the invention or LPS (positive control),
washed with PBS containing 1% BSA and 0.02 mM sodium azide, and
then incubated with 1:20 dilution of appropriate FITC- or
PE-labeled monoclonal antibodies for 30 minutes at 4 degrees C.
After an additional wash, the labeled cells are analyzed by flow
cytometry on a FACScan (Becton Dickinson).
[0852] Effect on the production of cytokines. Cytokines generated
by dendritic cells, in particular IL-12, are important in the
initiation of T-cell dependent immune responses. IL-12 strongly
influences the development of Thl helper T-cell immune response,
and induces cytotoxic T and NK cell function. An ELISA is used to
measure the IL-12 release as follows. Dendritic cells (10.sup.6/ml)
are treated with increasing concentrations of an albumin fusion
protein of the invention for 24 hours. LPS (100 ng/ml) is added to
the cell culture as positive control. Supernatants from the cell
cultures are then collected and analyzed for IL-12 content using
commercial ELISA kit (e.g., R & D Systems (Minneapolis,
Minn.)). The standard protocols provided with the kits are
used.
[0853] Effect on the expression of MHC Class II. costimulatory and
adhesion molecules. Three major families of cell surface antigens
can be identified on monocytes: adhesion molecules, molecules
involved in antigen presentation, and Fc receptor. Modulation of
the expression of MHC class II antigens and other costimulatory
molecules, such as B7 and ICAM-1, may result in changes in the
antigen presenting capacity of monocytes and ability to induce T
cell activation. Increased expression of Fc receptors may correlate
with improved monocyte cytotoxic activity, cytokine release and
phagocytosis.
[0854] FACS analysis is used to examine the surface antigens as
follows. Monocytes are treated 1-5 days with increasing
concentrations of an albumin fusion protein of the invention or LPS
(positive control), washed with PBS containing 1% BSA and 0.02 mM
sodium azide, and then incubated with 1:20 dilution of appropriate
FITC- or PE-labeled monoclonal antibodies for 30 minutes at 4
degrees C. After an additional wash, the labeled cells are analyzed
by flow cytometry on a FACScan (Becton Dickinson).
[0855] Monocyte activation and/or increased survival. Assays for
molecules that activate (or alternatively, inactivate) monocytes
and/or increase monocyte survival (or alternatively, decrease
monocyte survival) are known in the art and may routinely be
applied to determine whether a molecule of the invention functions
as an inhibitor or activator of monocytes. Albumin fusion proteins
of the invention can be screened using the three assays described
below. For each of these assays, Peripheral blood mononuclear cells
(PBMC) are purified from single donor leukopacks (American Red
Cross, Baltimore, Md.) by centrifugation through a Histopaque
gradient (Sigma). Monocytes are isolated from PBMC by counterflow
centrifugal elutriation.
[0856] Monocyte Survival Assay. Human peripheral blood monocytes
progressively lose viability when cultured in absence of serum or
other stimuli. Their death results from internally regulated
processes (apoptosis). Addition to the culture of activating
factors, such as TNF-alpha dramatically improves cell survival and
prevents DNA fragmentation. Propidium iodide (PI) staining is used
to measure apoptosis as follows. Monocytes are cultured for 48
hours in polypropylene tubes in serum-free medium (positive
control), in the presence of 100 ng/ml TNF-alpha (negative
control), and in the presence of varying concentrations of the
fusion protein to be tested. Cells are suspended at a concentration
of 2.times.10.sup.6/ml in PBS containing PI at a final
concentration of 5 .mu.g/ml, and then incubated at room temperature
for 5 minutes before FACScan analysis. PI uptake has been
demonstrated to correlate with DNA fragmentation in this
experimental paradigm.
[0857] Effect on cvtokine release. An important function of
monocytes/macrophages is their regulatory activity on other
cellular populations of the immune system through the release of
cytokines after stimulation. An ELISA to measure cytokine release
is performed as follows. Human monocytes are incubated at a density
of 5.times.10.sup.5 cells/ml with increasing concentrations of an
albumin fusion protein of the invention and under the same
conditions, but in the absence of the fusion protein. For IL-12
production, the cells are primed overnight with IFN (100 U/ml) in
the presence of the fusion protein. LPS (10 ng/ml) is then added.
Conditioned media are collected after 24 h and kept frozen until
use. Measurement of TNF-alpha, IL-10, MCP-1 and IL-8 is then
performed using a commercially available ELISA kit (e.g., R & D
Systems (Minneapolis, Minn.)) and applying the standard protocols
provided with the kit.
[0858] Oxidative burst. Purified monocytes are plated in 96-w plate
at 2-1.times.10.sup.5 cell/well.
[0859] Increasing concentrations of an albumin fusion protein of
the invention are added to the wells in a total volume of 0.2 ml
culture medium (RPMI 1640+10% FCS, glutamine and antibiotics).
After 3 days incubation, the plates are centrifuged and the medium
is removed from the wells. To the macrophage monolayers, 0.2 ml per
well of phenol red solution (140 mM NaCl, 10 mM potassium phosphate
buffer pH 7.0, 5.5 mM dextrose, 0.56 mM phenol red and 19 U/ml of
HRPO) is added, together with the stimulant (200 nM PMA). The
plates are incubated at 37.degree. C. for 2 hours and the reaction
is stopped by adding 20 .mu.l 1N NaOH per well. The absorbance is
read at 610 nm. To calculate the amount of H.sub.2O.sub.2 produced
by the macrophages, a standard curve of a H.sub.2O.sub.2 solution
of known molarity is performed for each experiment.
[0860] The studies described in this example tested activity of
fusion proteins of the invention. However, one skilled in the art
could easily modify the exemplified studies to test the activity of
fusion proteins or polynucleotides of the invention (e.g., gene
therapy).
Example 23
Biological Effects of Fusion Proteins of the Invention
[0861] Astrocyte and Neuronal Assays
[0862] Albumin fusion proteins of the invention can be tested for
activity in promoting the survival, neurite outgrowth, or
phenotypic differentiation of cortical neuronal cells and for
inducing the proliferation of glial fibrillary acidic protein
immunopositive cells, astrocytes. The selection of cortical cells
for the bioassay is based on the prevalent expression of FGF-1 and
FGF-2 in cortical structures and on the previously reported
enhancement of cortical neuronal survival resulting from FGF-2
treatment. A thymidine incorporation assay, for example, can be
used to elucidate an albumin fusion protein of the invention's
activity on these cells.
[0863] Moreover, previous reports describing the biological effects
of FGF-2 (basic FGF) on cortical or hippocampal neurons in vitro
have demonstrated increases in both neuron survival and neurite
outgrowth (Walicke et al., "Fibroblast growth factor promotes
survival of dissociated hippocampal neurons and enhances neurite
extension." Proc. Natl. Acad. Sci. USA 83:3012-3016. (1986), assay
herein incorporated by reference in its entirety). However, reports
from experiments done on PC-12 cells suggest that these two
responses are not necessarily synonymous and may depend on not only
which FGF is being tested but also on which receptor(s) are
expressed on the target cells. Using the primary cortical neuronal
culture paradigm, the ability of an albumin fusion protein of the
invention to induce neurite outgrowth can be compared to the
response achieved with FGF-2 using, for example, a thymidine
incorporation assay.
[0864] Fibroblast and Endothelial Cell Assays
[0865] Human lung fibroblasts are obtained from Clonetics (San
Diego, Calif.) and maintained in growth media from Clonetics.
Dermal microvascular endothelial cells are obtained from Cell
Applications (San Diego, Calif.). For proliferation assays, the
human lung fibroblasts and dermal microvascular endothelial cells
can be cultured at 5,000 cells/well in a 96-well plate for one day
in growth medium. The cells are then incubated for one day in 0.1%
BSA basal medium. After replacing the medium with fresh 0.1% BSA
medium, the cells are incubated with the test fusion protein of the
invention proteins for 3 days. Alamar Blue (Alamar Biosciences,
Sacramento, Calif.) is added to each well to a final concentration
of 10%. The cells are incubated for 4 hr. Cell viability is
measured by reading in a CytoFluor fluorescence reader. For the
PGE.sub.2 assays, the human lung fibroblasts are cultured at 5,000
cells/well in a 96-well plate for one day. After a medium change to
0.1% BSA basal medium, the cells are incubated with FGF-2 or fusion
protein of the invention with or without IL-1.alpha. for 24 hours.
The supernatants are collected and assayed for PGE.sub.2 by EIA kit
(Cayman, Ann Arbor, Mich.). For the IL-6 assays, the human lung
fibroblasts are cultured at 5,000 cells/well in a 96-well plate for
one day. After a medium change to 0.1% BSA basal medium, the cells
are incubated with FGF-2 or with or without an albumin fusion
protein of the invention and/or IL-1.alpha. for 24 hours. The
supernatants are collected and assayed for IL-6 by ELISA kit
(Endogen, Cambridge, Mass.).
[0866] Human lung fibroblasts are cultured with FGF-2 or an albumin
fusion protein of the invention for 3 days in basal medium before
the addition of Alamar Blue to assess effects on growth of the
fibroblasts. FGF-2 should show a stimulation at 10-2500 ng/ml which
can be used to compare stimulation with the fusion protein of the
invention.
[0867] Cell Proliferation Based on [3H]Thymidine Incorporation
[0868] The following [3H]Thymidine incorporation assay can be used
to measure the effect of a Therapeutic proteins, e.g., growth
factor proteins, on the proliferation of cells such as fibroblast
cells, epithelial cells or immature muscle cells.
[0869] Sub-confluent cultures are arrested in G1 phase by an 18 h
incubation in serum-free medium. Therapeutic proteins are then
added for 24 h and during the last 4 h, the cultures are labeled
with [3H]thymidine, at a final concentration of 0.33 .mu.M (25
Ci/mmol, Amersham, Arlington Heights, Ill.). The incorporated
[3H]thymidine is precipitated with ice-cold 10% trichloroacetic
acid for 24 h. Subsequently, the cells are rinsed sequentially with
ice-cold 10% trichloroacetic acid and then with ice-cold water.
Following lysis in 0.5 M NaOH, the lysates and PBS rinses (500 ml)
are pooled, and the amount of radioactivity is measured.
[0870] Parkinson Models.
[0871] The loss of motor function in Parkinson's disease is
attributed to a deficiency of striatal dopamine resulting from the
degeneration of the nigrostriatal dopaminergic projection neurons.
An animal model for Parkinson's that has been extensively
characterized involves the systemic administration of 1-methyl-4
phenyl 1,2,3,6-tetrahydropyridine (MPTP). In the CNS, MPTP is
taken-up by astrocytes and catabolized by monoamine oxidase B to
1-methyl-4-phenyl pyridine (MPP.sup.+) and released. Subsequently,
MPP.sup.+ is actively accumulated in dopaminergic neurons by the
high-affinity reuptake transporter for dopamine. MPP.sup.+ is then
concentrated in mitochondria by the electrochemical gradient and
selectively inhibits nicotidamide adenine disphosphate: ubiquinone
oxidoreductionase (complex I), thereby interfering with electron
transport and eventually generating oxygen radicals.
[0872] It has been demonstrated in tissue culture paradigms that
FGF-2 (basic FGF) has trophic activity towards nigral dopaminergic
neurons (Ferrari et al., Dev. Biol. 1989). Recently, Dr. Unsicker's
group has demonstrated that administering FGF-2 in gel foam
implants in the striatum results in the near complete protection of
nigral dopaminergic neurons from the toxicity associated with MPTP
exposure (Otto and Unsicker, J. Neuroscience, 1990).
[0873] Based on the data with FGF-2, an albumin fusion protein of
the invention can be evaluated to determine whether it has an
action similar to that of FGF-2 in enhancing dopaminergic neuronal
survival in vitro and it can also be tested in vivo for protection
of dopaminergic neurons in the striatum from the damage associated
with MPTP treatment. The potential effect of an albumin fusion
protein of the invention is first examined in vitro in a
dopaminergic neuronal cell culture paradigm. The cultures are
prepared by dissecting the midbrain floor plate from gestation day
14 Wistar rat embryos. The tissue is dissociated with trypsin and
seeded at a density of 200,000 cells/cm.sup.2 on
polyorthinine-laminin coated glass coverslips. The cells are
maintained in Dulbecco's Modified Eagle's medium and F12 medium
containing hormonal supplements (N1). The cultures are fixed with
paraformaldehyde after 8 days in vitro and are processed for
tyrosine hydroxylase, a specific marker for dopaminergic neurons,
immunohistochemical staining. Dissociated cell cultures are
prepared from embryonic rats. The culture medium is changed every
third day and the factors are also added at that time.
[0874] Since the dopaminergic neurons are isolated from animals at
gestation day 14, a developmental time which is past the stage when
the dopaminergic precursor cells are proliferating, an increase in
the number of tyrosine hydroxylase immunopositive neurons would
represent an increase in the number of dopaminergic neurons
surviving in vitro. Therefore, if a Therapeutic protein acts to
prolong the survival of dopaminergic neurons, it would suggest that
the fusion protein may be involved in Parkinson's Disease.
[0875] The studies described in this example tested activity of
albumin fusion proteins of the invention. However, one skilled in
the art could easily modify the exemplified studies to test the
activity of fusion proteins and polynucleotides of the invention
(e.g., gene therapy).
Example 24
The Effect of Albumin Fusion Proteins of the Invention on the
Growth of Vascular Endothelial Cells
[0876] On day 1, human umbilical vein endothelial cells (HUVEC) are
seeded at 2-5.times.10.sup.4 cells/35 mm dish density in M199
medium containing 4% fetal bovine serum (FBS), 16 units/ml heparin,
and 50 units/ml endothelial cell growth supplements (ECGS,
Biotechnique, Inc.). On day 2, the medium is replaced with M199
containing 10% FBS, 8 units/ml heparin. An albumin fusion protein
of the invention, and positive controls, such as VEGF and basic
[0877] FGF (bFGF) are added, at varying concentrations. On days 4
and 6, the medium is replaced. On day 8, cell number is determined
with a Coulter Counter.
[0878] An increase in the number of HUVEC cells indicates that the
fusion protein may proliferate vascular endothelial cells, while a
decrease in the number of HUVEC cells indicates that the fusion
protein inhibits vascular endothelial cells.
[0879] The studies described in this example tested activity of an
albumin fusion protein of the invention. However, one skilled in
the art could easily modify the exemplified studies to test the
activity of a fusion protiem and polynucleotides of the
invention.
Example 25
Rat Corneal Wound Healing Model
[0880] This animal model shows the effect of an albumin fusion
protein of the invention on neovascularization. The experimental
protocol includes:
[0881] Making a 1-1.5 mm long incision from the center of cornea
into the stromal layer.
[0882] Inserting a spatula below the lip of the incision facing the
outer corner of the eye.
[0883] Making a pocket (its base is 1-1.5 mm foiiii the edge of the
eye).
[0884] Positioning a pellet, containing 50 ng-5 ug of an albumin
fusion protein of the invention, within the pocket.
[0885] Treatment with an an albumin fusion protein of the invention
can also be applied topically to the corneal wounds in a dosage
range of 20 mg-500 mg (daily treatment for five days).
[0886] The studies described in this example test the activity of
an albumin fusion protein of the invention. However, one skilled in
the art could easily modify the exemplified studies to test the
activity of fusion proteins and polynucleotides of the invention
(e.g., gene therapy).
Example 26
Diabetic Mouse and Glucocorticoid-Impaired
[0887] Wound Healing Models
[0888] Diabetic db+/db+ Mouse Model.
[0889] To demonstrate that an albumin fusion protein of the
invention accelerates the healing process, the genetically diabetic
mouse model of wound healing is used. The full thickness wound
healing model in the db+/db+ mouse is a well characterized,
clinically relevant and reproducible model of impaired wound
healing. Healing of the diabetic wound is dependent on formation of
granulation tissue and re-epithelialization rather than contraction
(Gartner, M. H. et al., J. Surg. Res. 52:389 (1992); Greenhalgh, D.
G. et al., Am. J. Pathol. 136:1235 (1990)).
[0890] The diabetic animals have many of the characteristic
features observed in Type II diabetes mellitus. Homozygous
(db+/db+) mice are obese in comparison to their normal heterozygous
(db+/+m) littermates. Mutant diabetic (db+/db+) mice have a single
autosomal recessive mutation on chromosome 4 (db+) (Coleman et al.
Proc. Natl. Acad. Sci. USA 77:283-293 (1982)). Animals show
polyphagia, polydipsia and polyuria. Mutant diabetic mice (db+/db+)
have elevated blood glucose, increased or normal insulin levels,
and suppressed cell-mediated immunity (Mandel et al., J. Immunol.
120:1375 (1978); Debray-Sachs, M. et al., Clin. Exp. Immunol.
51(1):1-7 (1983); Leiter et al., Am. J. of Pathol. 114:46-55
(1985)). Peripheral neuropathy, myocardial complications, and
microvascular lesions, basement membrane thickening and glomerular
filtration abnormalities have been described in these animals
(Norido, F. et al., Exp. Neurol. 83(2):221-232 (1984); Robertson et
al., Diabetes 29(1):60-67 (1980); Giacomelli et al., Lab Invest.
40(4):460-473 (1979); Coleman, D. L., Diabetes 31 (Suppl):1-6
(1982)). These homozygous diabetic mice develop hyperglycemia that
is resistant to insulin analogous to human type II diabetes (Mandel
et al., J. Immunol. 120:1375-1377 (1978)).
[0891] The characteristics observed in these animals suggests that
healing in this model may be similar to the healing observed in
human diabetes (Greenhalgh, et al., Am. J. of Pathol. 136:1235-1246
(1990)).
[0892] Genetically diabetic female C57BL/KsJ (db+/db+) mice and
their non-diabetic (db+/+m) heterozygous littermates are used in
this study (Jackson Laboratories). The animals are purchased at 6
weeks of age and are 8 weeks old at the beginning of the study.
Animals are individually housed and received food and water ad
libitum. All manipulations are performed using aseptic techniques.
The experiments are conducted according to the rules and guidelines
of Human Genome Sciences, Inc. Institutional Animal Care and Use
Committee and the Guidelines for the Care and Use of Laboratory
Animals.
[0893] Wounding protocol is performed according to previously
reported methods (Tsuboi, R. and Rifkin, D. B., J. Exp. Med.
172:245-251 (1990)). Briefly, on the day of wounding, animals are
anesthetized with an intraperitoneal injection of Avertin (0.01
mg/mL), 2,2,2-tribromoethanol and 2-methyl-2-butanol dissolved in
deionized water. The dorsal region of the animal is shaved and the
skin washed with 70% ethanol solution and iodine. The surgical area
is dried with sterile gauze prior to wounding. An 8 mm
full-thickness wound is then created using a Keyes tissue punch.
Immediately following wounding, the surrounding skin is gently
stretched to eliminate wound expansion. The wounds are left open
for the duration of the experiment. Application of the treatment is
given topically for 5 consecutive days commencing on the day of
wounding. Prior to treatment, wounds are gently cleansed with
sterile saline and gauze sponges.
[0894] Wounds are visually examined and photographed at a fixed
distance at the day of surgery and at two day intervals thereafter.
Wound closure is determined by daily measurement on days 1-5 and on
day 8. Wounds are measured horizontally and vertically using a
calibrated Jameson caliper. Wounds are considered healed if
granulation tissue is no longer visible and the wound is covered by
a continuous epithelium.
[0895] An albumin fusion protein of the invention is administered
using at a range different doses, from 4 mg to 500 mg per wound per
day for 8 days in vehicle. Vehicle control groups received 50 mL of
vehicle solution.
[0896] Animals are euthanized on day 8 with an intraperitoneal
injection of sodium pentobarbital (300 mg/kg). The wounds and
surrounding skin are then harvested for histology and
immunohistochemistry. Tissue specimens are placed in 10% neutral
buffered formalin in tissue cassettes between biopsy sponges for
further processing.
[0897] Three groups of 10 animals each (5 diabetic and 5
non-diabetic controls) are evaluated: 1) Vehicle placebo control,
2) untreated group, and 3) treated group.
[0898] Wound closure is analyzed by measuring the area in the
vertical and horizontal axis and obtaining the total square area of
the wound. Contraction is then estimated by establishing the
differences between the initial wound area (day 0) and that of post
treatment (day 8). The wound area on day 1 is 64 mm.sup.2, the
corresponding size of the dermal punch. Calculations are made
using, the following formula:
[Open area on day 8]-[Open area on day 1]/[Open area on day 1]
[0899] Specimens are fixed in 10% buffered formalin and paraffin
embedded blocks are sectioned perpendicular to the wound surface (5
mm) and cut using a Reichert-Jung, microtome. Routine
hematoxylin-eosin (H&E) staining is performed on cross-sections
of bisected wounds. Histologic examination of the wounds are used
to assess whether the healing process and the morphologic
appearance of the repaired skin is altered by treatment with an
albumin fusion protein of the invention. This assessment included
verification of the presence of cell accumulation, inflammatory
cells, capillaries, fibroblasts, re-epithelialization and epidermal
maturity (Greenhalgh, D. G. et al., Am. J. Pathol. 136:1235
(1990)). A calibrated lens micrometer is used by a blinded
observer.
[0900] Tissue sections are also stained immunohistochemically with
a polyclonal rabbit anti-human keratin antibody using ABC Elite
detection system. Human skin is used as a positive tissue control
while non-immune IgG is used as a negative control. Keratinocyte
growth is determined by evaluating the extent of
reepithelialization of the wound using a calibrated lens
micrometer.
[0901] Proliferating cell nuclear antigen/cyclin (PCNA) in skin
specimens is demonstrated by using anti-PCNA antibody (1:50) with
an ABC Elite detection system. Human colon cancer served as a
positive tissue control and human brain tissue is used as a
negative tissue control. Each specimen included a section with
omission of the primary antibody and substitution with non-immune
mouse IgG. Ranking of these sections is based on the extent of
proliferation on a scale of 0-8, the lower side of the scale
reflecting slight proliferation to the higher side reflecting
intense proliferation.
[0902] Experimental data are analyzed using an unpaired t test. A p
value of <0.05 is considered significant.
[0903] Steroid Impaired Rat Model
[0904] The inhibition of wound healing by steroids has been well
documented in various in vitro and in vivo systems (Wahl,
Glucocorticoids and Wound healing. In: Anti-Inflammatory Steroid
Action: Basic and Clinical Aspects. 280-302 (1989); Wahlet al., J.
Immunol. 115: 476-481 (1975); Werb et al., J. Exp. Med.
147:1684-1694 (1978)). Glucocorticoids retard wound healing by
inhibiting angiogenesis, decreasing vascular permeability (Ebert et
al., An. Intern. Med. 37:701-705 (1952)), fibroblast proliferation,
and collagen synthesis (Beck et al., Growth Factors. 5: 295-304
(1991); Haynes et al., J. Clin. Invest. 61: 703-797 (1978)) and
producing a transient reduction of circulating monocytes (Haynes et
al., J. Clin. Invest. 61: 703-797 (1978); Wahl, "Glucocorticoids
and wound healing", In: Antiinflammatory Steroid Action: Basic and
Clinical Aspects, Academic Press, New York, pp. 280-302 (1989)).
The systemic administration of steroids to impaired wound healing
is a well establish phenomenon in rats (Beck et al., Growth
Factors. 5: 295-304 (1991); Haynes et al., J. Clin. Invest. 61:
703-797 (1978); Wahl, "Glucocorticoids and wound healing", In:
Antiinflammatory Steroid Action: Basic and Clinical Aspects,
Academic Press, New York, pp. 280-302 (1989); Pierce et al., Proc.
Natl. Acad. Sci. USA 86: 2229-2233 (1989)).
[0905] To demonstrate that an albumin fusion protein of the
invention can accelerate the healing process, the effects of
multiple topical applications of the fusion protein on full
thickness excisional skin wounds in rats in which healing has been
impaired by the systemic administration of methylprednisolone is
assessed.
[0906] Young adult male Sprague Dawley rats weighing 250-300 g
(Charles River Laboratories) are used in this example. The animals
are purchased at 8 weeks of age and are 9 weeks old at the
beginning of the study. The healing response of rats is impaired by
the systemic administration of methylprednisolone (17 mg/kg/rat
intramuscularly) at the time of wounding. Animals are individually
housed and received food and water ad libitum. All manipulations
are performed using aseptic techniques. This study is conducted
according to the rules and guidelines of Human Genome Sciences,
Inc. Institutional Animal Care and Use Committee and the Guidelines
for the Care and Use of Laboratory Animals.
[0907] The wounding protocol is followed according to that
described above. On the day of wounding, animals are anesthetized
with an intramuscular injection of ketamine (50 mg/kg) and xylazine
(5 mg/kg). The dorsal region of the animal is shaved and the skin
washed with 70% ethanol and iodine solutions. The surgical area is
dried with sterile gauze prior to wounding. An 8 mm full-thickness
wound is created using a Keyes tissue punch. The wounds are left
open for the duration of the experiment. Applications of the
testing materials are given topically once a day for 7 consecutive
days commencing on the day of wounding and subsequent to
methylprednisolone administration. Prior to treatment, wounds are
gently cleansed with sterile saline and gauze sponges.
[0908] Wounds are visually examined and photographed at a fixed
distance at the day of wounding and at the end of treatment. Wound
closure is determined by daily measurement on days 1-5 and on day
8. Wounds are measured horizontally and vertically using a
calibrated Jameson caliper. Wounds are considered healed if
granulation tissue is no longer visible and the wound is covered by
a continuous epithelium.
[0909] The fusion protein of the invention is administered using at
a range different doses, from 4 mg to 500 mg per wound per day for
8 days in vehicle. Vehicle control groups received 50 mL of vehicle
solution.
[0910] Animals are euthanized on day 8 with an intraperitoneal
injection of sodium pentobarbital (300 mg/kg). The wounds and
surrounding skin are then harvested for histology. Tissue specimens
are placed in 10% neutral buffered formalin in tissue cassettes
between biopsy sponges for further processing.
[0911] Three groups of 10 animals each (5 with methylprednisolone
and 5 without glucocorticoid) are evaluated: 1) Untreated group 2)
Vehicle placebo control 3) treated groups.
[0912] Wound closure is analyzed by measuring the area in the
vertical and horizontal axis and obtaining the total area of the
wound. Closure is then estimated by establishing the differences
between the initial wound area (day 0) and that of post treatment
(day 8). The wound area on day 1 is 64mm.sup.2, the corresponding
size of the dermal punch. Calculations are made using the following
formula:
[Open area on day 8]-[Open area on day 1]/[Open area on day 1]
[0913] Specimens are fixed in 10% buffered formalin and paraffin
embedded blocks are sectioned perpendicular to the wound surface
(5mm) and cut using an Olympus microtome. Routine hematoxylin-eosin
(H&E) staining is performed on cross-sections of bisected
wounds. Histologic examination of the wounds allows assessment of
whether the healing process and the morphologic appearance of the
repaired skin is improved by treatment with an albumin fusion
protein of the invention. A calibrated lens micrometer is used by a
blinded observer to determine the distance of the wound gap.
[0914] Experimental data are analyzed using an unpaired t test. A p
value of <0.05 is considered significant.
[0915] The studies described in this example tested activity of an
albumin fusion protein of the invention. However, one skilled in
the art could easily modify the exemplified studies to test the
activity of fusion proteins and polynucleotides of the invention
(e.g., gene therapy).
Example 27
Lymphedema Animal Model
[0916] The purpose of this experimental approach is to create an
appropriate and consistent lymphedema model for testing the
therapeutic effects of an albumin fusion protein of the invention
in lymphangiogenesis and re-establishment of the lymphatic
circulatory system in the rat hind limb. Effectiveness is measured
by swelling volume of the affected limb, quantification of the
amount of lymphatic vasculature, total blood plasma protein, and
histopathology. Acute lymphedema is observed for 7-10 days. Perhaps
more importantly, the chronic progress of the edema is followed for
up to 3-4 weeks.
[0917] Prior to beginning surgery, blood sample is drawn for
protein concentration analysis. Male rats weighing approximately
.about.350 g are dosed with Pentobarbital. Subsequently, the right
legs are shaved from knee to hip. The shaved area is swabbed with
gauze soaked in 70% EtOH. Blood is drawn for serum total protein
testing. Circumference and volumetric measurements are made prior
to injecting dye into paws after marking 2 measurement levels (0.5
cm above heel, at mid-pt of dorsal paw). The intradermal dorsum of
both right and left paws are injected with 0.05 ml of 1% Evan's
Blue. Circumference and volumetric measurements are then made
following injection of dye into paws.
[0918] Using the knee joint as a landmark, a mid-leg inguinal
incision is made circumferentially allowing the femoral vessels to
be located. Forceps and hemostats are used to dissect and separate
the skin flaps. After locating the femoral vessels, the lymphatic
vessel that runs along side and underneath the vessel(s) is
located. The main lymphatic vessels in this area are then
electrically coagulated or suture ligated.
[0919] Using a microscope, muscles in back of the leg (near the
semitendinosis and adductors) are bluntly dissected. The popliteal
lymph node is then located. The 2 proximal and 2 distal lymphatic
vessels and distal blood supply of the popliteal node are then
ligated by suturing. The popliteal lymph node, and any accompanying
adipose tissue, is then removed by cutting connective tissues.
[0920] Care is taken to control any mild bleeding resulting from
this procedure. After lymphatics are occluded, the skin flaps are
sealed by using liquid skin (Vetbond) (AJ Buck). The separated skin
edges are sealed to the underlying muscle tissue while leaving a
gap of .about.0.5 cm around the leg. Skin also may be anchored by
suturing to underlying muscle when necessary.
[0921] To avoid infection, animals are housed individually with
mesh (no bedding). Recovering animals are checked daily through the
optimal edematous peak, which typically occurred by day 5-7. The
plateau edematous peak are then observed. To evaluate the intensity
of the lymphedema, the circumference and volumes of 2 designated
places on each paw before operation and daily for 7 days are
measured. The effect of plasma proteins on lymphedema is determined
and whether protein analysis is a useful testing perimeter is also
investigated. The weights of both control and edematous limbs are
evaluated at 2 places. Analysis is performed in a blind manner.
[0922] Circumference Measurements: Under brief gas anesthetic to
prevent limb movement, a cloth tape is used to measure limb
circumference. Measurements are done at the ankle bone and dorsal
paw by 2 different people and those 2 readings are averaged.
Readings are taken from both control and edematous limbs.
[0923] Volumetric Measurements: On the day of surgery, animals are
anesthetized with Pentobarbital and are tested prior to surgery.
For daily volumetrics animals are under brief halothane anesthetic
(rapid immobilization and quick recovery), and both legs are shaved
and equally marked using waterproof marker on legs. Legs are first
dipped in water, then dipped into instrument to each marked level
then measured by Buxco edema software (Chen/Victor). Data is
recorded by one person, while the other is dipping the limb to
marked area.
[0924] Blood-plasma protein measurements: Blood is drawn, spun, and
serum separated prior to surgery and then at conclusion for total
protein and Ca2.sup.+ comparison.
[0925] Limb Weight Comparison: After drawing blood, the animal is
prepared for tissue collection. The limbs are amputated using a
quillitine, then both experimental and control legs are cut at the
ligature and weighed. A second weighing is done as the
tibio-cacaneal joint is disarticulated and the foot is weighed.
[0926] Histological Preparations: The transverse muscle located
behind the knee (popliteal) area is dissected and arranged in a
metal mold, filled with freezeGel, dipped into cold methylbutane,
placed into labeled sample bags at -80 EC until sectioning. Upon
sectioning, the muscle is observed under fluorescent microscopy for
lymphatics.
[0927] The studies described in this example tested activity of
fusion proteins of the invention. However, one skilled in the art
could easily modify the exemplified studies to test the activity of
fusion protein and polynucleotides of the invention (e.g., gene
therapy).
Example 28
Suppression of TNF Alpha-Induced Adhesion Molecule Expression by an
Albumin Fusion Protein of the Invention
[0928] The recruitment of lymphocytes to areas of inflammation and
angiogenesis involves specific receptor-ligand interactions between
cell surface adhesion molecules (CAMs) on lymphocytes and the
vascular endothelium. The adhesion process, in both normal and
pathological settings, follows a multi-step cascade that involves
intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion
molecule-1 (VCAM-1), and endothelial leukocyte adhesion molecule-1
(E-selectin) expression on endothelial cells (EC). The expression
of these molecules and others on the vascular endothelium
determines the efficiency with which leukocytes may adhere to the
local vasculature and extravasate into the local tissue during the
development of an inflammatory response. The local concentration of
cytokines and growth factor participate in the modulation of the
expression of these CAMs.
[0929] Tumor necrosis factor alpha (TNF-a), a potent
proinflamrnatory cytokine, is a stimulator of all three CAMs on
endothelial cells and may be involved in a wide variety of
inflammatory responses, often resulting in a pathological
outcome.
[0930] The potential of an albumin fusion protein of the invention
to mediate a suppression of TNF-a induced CAM expression can be
examined. A modified ELISA assay which uses ECs as a solid phase
absorbent is employed to measure the amount of CAM expression on
TNF-a treated ECs when co-stimulated with a member of the FGF
family of proteins.
[0931] To perform the experiment, human umbilical vein endothelial
cell (HUVEC) cultures are obtained from pooled cord harvests and
maintained in growth medium (EGM-2; Clonetics, San Diego, Calif.)
supplemented with 10% FCS and 1% penicillin/streptomycin in a 37
degree C. humidified incubator containing 5% CO.sup.2. HUVECs are
seeded in 96-well plates at concentrations of 1.times.10.sup.4
cells/well in EGM medium at 37 degree C. for 18-24 hrs or until
confluent. The monolayers are subsequently washed 3 times with a
serum-free solution of RPMI-1640 supplemented with 100 U/ml
penicillin and 100 mg/ml streptomycin, and treated with a given
cytokine and/or growth factor(s) for 24 h at 37 degree C. Following
incubation, the cells are then evaluated for CAM expression.
[0932] Human Umbilical Vein Endothelial cells (HUVECs) are grown in
a standard 96 well plate to confluence. Growth medium is removed
from the cells and replaced with 90 ul of 199 Medium (10% FBS).
Samples for testing and positive or negative controls are added to
the plate in triplicate (in 10 ul volumes). Plates are incubated at
37 degree C. for either 5 h (selectin and integrin expression) or
24 h (integrin expression only). Plates are aspirated to remove
medium and 100 .mu.l of 0.1% paraformaldehyde-PBS (with Ca++ and
Mg++) is added to each well. Plates are held at 4.degree. C. for 30
min.
[0933] Fixative is then removed from the wells and wells are washed
1.times. with PBS(+Ca,Mg)+0.5% BSA and drained. Do not allow the
wells to dry. Add 10 .mu.l of diluted primary antibody to the test
and control wells. Anti-ICAM-1-Biotin, Anti-VCAM-1-Biotin and
Anti-E-selectin-Biotin are used at a concentration of 10 .mu.g/ml
(1:10 dilution of 0.1 mg/ml stock antibody). Cells are incubated at
37.degree. C. for 30 min. in a humidified environment. Wells are
washed .times.3 with PBS(+Ca,Mg)+0.5% BSA.
[0934] Then add 20 .mu.l of diluted ExtrAvidin-Alkaline Phosphotase
(1:5,000 dilution) to each well and incubated at 37.degree. C. for
30 min. Wells are washed .times.3 with PBS(+Ca,Mg)+0.5% BSA. 1
tablet of p-Nitrophenol Phosphate pNPP is dissolved in 5 ml of
glycine buffer (pH 10.4). 100 .mu.l of pNPP substrate in glycine
buffer is added to each test well. Standard wells in triplicate are
prepared from the working dilution of the ExtrAvidin-Alkaline
Phosphotase in glycine buffer: 1:5,000
(10.sup.0)>10.sup.+0.5>10.sup.-1>10.sup.-1.5. 5 .mu.l of
each dilution is added to triplecate wells and the resulting AP
content in each well is 5.50 ng, 1.74 ng, 0.55 ng, 0.18 ng. 100
.mu.l of pNNP reagent must then be added to each of the standard
wells. The plate must be incubated at 37.degree. C. for 4 h. A
volume of 50 .mu.l of 3M NaOH is added to all wells. The results
are quantified on a plate reader at 405 nm. The background
subtraction option is used on blank wells filled with glycine
buffer only. The template is set up to indicate the concentration
of AP-conjugate in each standard well [5.50 ng; 1.74 ng; 0.55 ng;
0.18 ng]. Results are indicated as amount of bound AP-conjugate in
each sample.
[0935] The studies described in this example tested activity of
fusion proteins of the invention. However, one skilled in the art
could easily modify the exemplified studies to test the activity of
fusion proteins and polynucleotides of the invention (e.g., gene
therapy).
Example 29
Construction of GAS Reporter Construct
[0936] One signal transduction pathway involved in the
differentiation and proliferation of cells is called the Jaks-STATs
pathway. Activated proteins in the Jaks-STATs pathway bind to gamma
activation site "GAS" elements or interferon-sensitive responsive
element ("ISRE"), located in the promoter of many genes. The
binding of a protein to these elements alter the expression of the
associated gene.
[0937] GAS and ISRE elements are recognized by a class of
transcription factors called Signal Transducers and Activators of
Transcription, or "STATs." There are six members of the STATs
family. Stat1 and Stat3 are present in many cell types, as is Stat2
(as response to IFN-alpha is widespread). Stat4 is more restricted
and is not in many cell types though it has been found in T helper
class I, cells after treatment with IL-12. Stat5 was originally
called mammary growth factor, but has been found at higher
concentrations in other cells including myeloid cells. It can be
activated in tissue culture cells by many cytokines.
[0938] The STATs are activated to translocate from the cytoplasm to
the nucleus upon tyrosine phosphorylation by a set of kinases known
as the Janus Kinase ("Jaks") family. Jaks represent a distinct
family of soluble tyrosine kinases and include Tyk2, Jak1, Jak2,
and Jak3. These kinases display significant sequence similarity and
are generally catalytically inactive in resting cells.
[0939] The Jaks are activated by a wide range of receptors
summarized in the Table below. (Adapted from review by Schidler and
Darnell, Ann. Rev. Biochem. 64:621-51 (1995)). A cytokine receptor
family, capable of activating Jaks, is divided into two groups: (a)
Class 1 includes receptors for IL-2, IL-3, IL-4, IL-6, IL-7, IL-9,
IL-11, IL-12, IL-15, Epo, PRL, GH, G-CSF, GM-CSF, LIF, CNTF, and
thrombopoietin; and (b) Class 2 includes IFN-a, IFN-g, and IL-10.
The Class 1 receptors share a conserved cysteine motif (a set of
four conserved cysteines and one tryptophan) and a WSXWS motif (a
membrane proximal region encoding Trp-Ser-Xaa-Trp-Ser (SEQ ID NO:
37)).
[0940] Thus, on binding of a ligand to a receptor, Jaks are
activated, which in turn activate STATs, which then translocate and
bind to GAS elements. This entire process is encompassed in the
Jaks-STATs signal transduction pathway. Therefore, activation of
the Jaks-STATs pathway, reflected by the binding of the GAS or the
ISRE element, can be used to indicate proteins involved in the
proliferation and differentiation of cells. For example, growth
factors and cytokines are known to activate the Jaks-STATs pathway
(See Table below). Thus, by using GAS elements linked to reporter
molecules, activators of the Jaks-STATs pathway can be
identified.
TABLE-US-00014 JAKs Ligand tyk2 Jak1 Jak2 Jak3 STATS GAS (elements)
or ISRE IFN family IFN-a/B + + - - 1, 2, 3 ISRE IFN-g + + - 1 GAS
(IRF1 > Lys6 > IFP) Il-10 + ? ? - 1, 3 gp130 family IL-6
(Pleiotropic) + + + ? 1, 3 GAS (IRF1 > Lys6 > IFP) Il-11
(Pleiotropic) ? + ? ? 1, 3 OnM (Pleiotropic) ? + + ? 1, 3 LIF
(Pleiotropic) ? + + ? 1, 3 CNTF (Pleiotropic) -/+ + + ? 1, 3 G-CSF
(Pleiotropic) ? + ? ? 1, 3 IL-12 (Pleiotropic) + - + + 1, 3 g-C
family IL-2 (lymphocytes) - + - + 1, 3, 5 GAS IL-4 (lymph/myeloid)
- + - + 6 GAS (IRF1 = IFP >>Ly6) (IgH) IL-7 (lymphocytes) - +
- + 5 GAS IL-9 (lymphocytes) - + - + 5 GAS IL-13 (lymphocyte) - + ?
? 6 GAS IL-15 ? + ? + 5 GAS gp140 family IL-3 (myeloid) - - + - 5
GAS (IRF1 > IFP >> Ly6) IL-5 (myeloid) - - + - 5 GAS
GM-CSF (myeloid) - - + - 5 GAS Growth hormone family GH ? - + - 5
PRL ? +/- + - 1, 3, 5 EPO ? - + - 5 GAS (B-CAS > IRF1 = IFP
>> Ly6) Receptor Tyrosine Kinases EGF ? + + - 1, 3 GAS (IRF1)
PDGF ? + + - 1, 3 CSF-1 ? + + - 1, 3 GAS (not IRF1)
[0941] To construct a synthetic GAS containing promoter element,
which is used in the Biological Assays described in Examples 32-33,
a PCR based strategy is employed to generate a GAS-SV40 promoter
sequence. The 5' primer contains four tandem copies of the GAS
binding site found in the IRF1 promoter and previously demonstrated
to bind STATs upon induction with a range of cytokines (Rothman et
al., Immunity 1:457-468 (1994).), although other GAS or ISRE
elements can be used instead. The 5' primer also contains 18bp of
sequence complementary to the SV40 early promoter sequence and is
flanked with an XhoI site. The sequence of the 5' primer is:
TABLE-US-00015 (SEQ ID NO: 38) 5':
GCGCCTCGAGATTTCCCCGAAATCTAGATTTTCCCCGAAATGATTT
CCCCGAAATGATTTCCCCGAAATATCTGCCATCTCAATTAG: 3' The downstream primer
is complementary to the SV40 promoter and is flanked with a Hind
III site: (SEQ ID NO: 39) 5': GCGGCAAGCTTTTTGCAAAGCCTAGGC: 3'
[0942] PCR amplification is performed using the SV40 promoter
template present in the B-gal:promoter plasmid obtained from
Clontech. The resulting PCR fragment is digested with XhoI/Hind III
and subcloned into BLSK2-. (Stratagene.) Sequencing with forward
and reverse primers confirms that the insert contains the following
sequence:
TABLE-US-00016 (SEQ ID NO: 40) 5':
CTCGAGATTTCCCCGAAATCTAGATTTCCCCGAAATGATTTCCCCG
AAATGATTTCCCCGAAATATCTGCCATCTCAATTAGTCAGCAACCATAGT
CCCGCCCCTAACTCCGCCCATCCCGCCCCTAACTCCGCCCAGTTCCGCCC
ATTCTCCGCCCCATGGCTGACTAATTTTTTTTATTTATGCAGAGGCCGAG
GCCGCCTCGGCCTCTGAGCTATTCCAGAAGTAGTGAGGAGGCTTTTTTGG
AGGCCTAGGCTTTTGCAAAAAGCTT: 3'
[0943] With this GAS promoter element linked to the SV40 promoter,
a GAS:SEAP2 reporter construct is next engineered. Here, the
reporter molecule is a secreted alkaline phosphatase, or "SEAP."
Clearly, however, any reporter molecule can be instead of SEAP, in
this or in any of the other Examples. Well known reporter molecules
that can be used instead of SEAP include chloramphenicol
acetyltransferase (CAT), luciferase, alkaline phosphatase,
B-galactosidase, green fluorescent protein (GFP), or any protein
detectable by an antibody.
[0944] The above sequence confirmed synthetic GAS-SV40 promoter
element is subcloned into the pSEAP-Promoter vector obtained from
Clontech using HindIII and XhoI, effectively replacing the SV40
promoter with the amplified GAS:SV40 promoter element, to create
the GAS-SEAP vector. However, this vector does not contain a
neomycin resistance gene, and therefore, is not preferred for
mammalian expression systems.
[0945] Thus, in order to generate mammalian stable cell lines
expressing the GAS-SEAP reporter, the GAS-SEAP cassette is removed
from the GAS-SEAP vector using SalI and NotI, and inserted into a
backbone vector containing the neomycin resistance gene, such as
pGFP-1 (Clontech), using these restriction sites in the multiple
cloning site, to create the GAS-SEAP/Neo vector. Once this vector
is transfected into mammalian cells, this vector can then be used
as a reporter molecule for GAS binding as described in Examples
32-33.
[0946] Other constructs can be made using the above description and
replacing GAS with a different promoter sequence. For example,
construction of reporter molecules containing EGR and NF-KB
promoter sequences are described in Examples 34 and 35. However,
many other promoters can be substituted using the protocols
described in these Examples. For instance, SRE, IL-2, NFAT, or
Osteocalcin promoters can be substituted, alone or in combination
(e.g., GAS/NF-KB/EGR, GAS/NF-KB, Il-2/NFAT, or NF-KB/GAS).
Similarly, other cell lines can be used to test reporter construct
activity, such as HELA (epithelial), HUVEC (endothelial), Reh
(B-cell), Saos-2 (osteoblast), HUVAC (aortic), or
Cardiomyocyte.
Example 30
Assay for SEAP Activity
[0947] As a reporter molecule for the assays described in examples
disclosed herein, SEAP activity is assayed using the Tropix
Phospho-light Kit (Cat. BP-400) according to the following general
procedure. The Tropix Phospho-light Kit supplies the Dilution,
Assay, and Reaction Buffers used below.
[0948] Prime a dispenser with the 2.5.times. Dilution Buffer and
dispense 15 ul of 2.5.times. dilution buffer into Optiplates
containing 35 ul of a solution containing an albumin fusion protein
of the invention. Seal the plates with a plastic sealer and
incubate at 65 degree C. for 30 min. Separate the Optiplates to
avoid uneven heating.
[0949] Cool the samples to room temperature for 15 minutes. Empty
the dispenser and prime with the Assay Buffer. Add 50 ml Assay
Buffer and incubate at room temperature 5 min. Empty the dispenser
and prime with the Reaction Buffer (see the Table below). Add 50 ul
Reaction Buffer and incubate at room temperature for 20 minutes.
Since the intensity of the chemiluminescent signal is time
dependent, and it takes about 10 minutes to read 5 plates on a
luminometer, thus one should treat 5 plates at each time and start
the second set 10 minutes later.
[0950] Read the relative light unit in the luminometer. Set H12 as
blank, and print the results. An increase in chemiluminescence
indicates reporter activity.
[0951] Reaction Buffer Formulation:
TABLE-US-00017 # of plates Rxn buffer diluent (ml) CSPD (ml) 10 60
3 11 65 3.25 12 70 3.5 13 75 3.75 14 80 4 15 85 4.25 16 90 4.5 17
95 4.75 18 100 5 19 105 5.25 20 110 5.5 21 115 5.75 22 120 6 23 125
6.25 24 130 6.5 25 135 6.75 26 140 7 27 145 7.25 28 150 7.5 29 155
7.75 30 160 8 31 165 8.25 32 170 8.5 33 175 8.75 34 180 9 35 185
9.25 36 190 9.5 37 195 9.75 38 200 10 39 205 10.25 40 210 10.5 41
215 10.75 42 220 11 43 225 11.25 44 230 11.5 45 235 11.75 46 240 12
47 245 12.25 48 250 12.5 49 255 12.75 50 260 13
Example 31
Assay Identifying Neuronal Activity.
[0952] When cells undergo differentiation and proliferation, a
group of genes are activated through many different signal
transduction pathways. One of these genes, EGR1 (early growth
response gene 1), is induced in various tissues and cell types upon
activation. The promoter of EGR1 is responsible for such induction.
Using the EGR1 promoter linked to reporter molecules, the ability
of fusion proteins of the invention to activate cells can be
assessed.
[0953] Particularly, the following protocol is used to assess
neuronal activity in PC12 cell lines. PC12 cells (rat
phenochromocytoma cells) are known to proliferate and/or
differentiate by activation with a number of mitogens, such as TPA
(tetradecanoyl phorbol acetate), NGF (nerve growth factor), and EGF
(epidermal growth factor). The EGRI gene expression is activated
during this treatment. Thus, by stably transfecting PC12 cells with
a construct containing an EGR promoter linked to SEAP reporter,
activation of PC12 cells by an albumin fusion protein of the
present invention can be assessed.
[0954] The EGR/SEAP reporter construct can be assembled by the
following protocol. The EGR-1 promoter sequence (-633 to
+1)(Sakamoto K et al., Oncogene 6:867-871 (1991)) can be PCR
amplified from human genomic DNA using the following primers:
TABLE-US-00018 (SEQ ID NO: 41) 5'
GCGCTCGAGGGATGACAGCGATAGAACCCCGG-3' (SEQ ID NO: 42) 5'
GCGAAGCTTCGCGACTCCCCGGATCCGCCTC-3'
[0955] Using the GAS:SEAP/Neo vector produced in Example 29, EGR1
amplified product can then be inserted into this vector. Linearize
the GAS:SEAP/Neo vector using restriction enzymes XhoI/HindIII,
removing the GAS/SV40 stuffer. Restrict the EGR1 amplified product
with these same enzymes. Ligate the vector and the EGR1
promoter.
[0956] To prepare 96 well-plates for cell culture, two mis of a
coating solution (1:30 dilution of collagen type I (Upstate Biotech
Inc. Cat #08-115) in 30% ethanol (filter sterilized)) is added per
one 10 cm plate or 50 ml per well of the 96-well plate, and allowed
to air dry for 2 hr.
[0957] PC12 cells are routinely grown in RPMI-1640 medium (Bio
Whittaker) containing 10% horse serum (JRH BIOSCIENCES, Cat.
#12449-78P), 5% heat-inactivated fetal bovine serum (FBS)
supplemented with 100 units/ml penicillin and 100 ug/ml
streptomycin on a precoated 10 cm tissue culture dish. One to four
split is done every three to four days. Cells are removed from the
plates by scraping and resuspended with pipetting up and down for
more than 15 times.
[0958] Transfect the EGR/SEAP/Neo construct into PC12 using
techniques known in the art. EGR-SEAP/PC12 stable cells are
obtained by growing the cells in 300 ug/ml G418. The G418-free
medium is used for routine growth but every one to two months, the
cells should be re-grown in 300 ug/ml G418 for couple of
passages.
[0959] To assay for neuronal activity, a 10 cm plate with cells
around 70 to 80% confluent is screened by removing the old medium.
Wash the cells once with PBS (Phosphate buffered saline). Then
starve the cells in low serum medium (RPMI-1640 containing 1% horse
serum and 0.5% FBS with antibiotics) overnight.
[0960] The next morning, remove the medium and wash the cells with
PBS. Scrape off the cells from the plate, suspend the cells well in
2 ml low serum medium. Count the cell number and add more low serum
medium to reach final cell density as 5.times.10.sup.5
cells/ml.
[0961] Add 200 ul of the cell suspension to each well of 96-well
plate (equivalent to 1.times.10.sup.5 cells/well). Add a series of
different concentrations of an albumin fusion protein of the
inventon, 37 degree C. for 48 to 72 hr. As a positive control, a
growth factor known to activate PC12 cells through EGR can be used,
such as 50 ng/ul of Neuronal Growth Factor (NGF). Over fifty-fold
induction of SEAP is typically seen in the positive control wells.
SEAP assay may be routinely performed using techniques known in the
art and/or as described in Example 30.
Example 32
Assay for T-Cell Activity
[0962] The following protocol is used to assess T-cell activity by
identifying factors, and determining whether an albumin fusion
protein of the invention proliferates and/or differentiates
T-cells. T-cell activity is assessed using the GAS/SEAP/Neo
construct produced in Example 29. Thus, factors that increase SEAP
activity indicate the ability to activate the Jaks-STATS signal
transduction pathway. The T-cell used in this assay is Jurkat
T-cells (ATCC Accession No. TIB-152), although Molt-3 cells (ATCC
Accession No. CRL-1552) and Molt-4 cells (ATCC Accession No.
CRL-1582) cells can also be used.
[0963] Jurkat T-cells are lymphoblastic CD4+ Th1 helper cells. In
order to generate stable cell lines, approximately 2 million Jurkat
cells are transfected with the GAS-SEAP/neo vector using DMRIE-C
(Life Technologies)(transfection procedure described below). The
transfected cells are seeded to a density of approximately 20,000
cells per well and transfectants resistant to 1 mg/ml genticin
selected. Resistant colonies are expanded and then tested for their
response to increasing concentrations of interferon gamma. The dose
response of a selected clone is demonstrated.
[0964] Specifically, the following protocol will yield sufficient
cells for 75 wells containing 200 ul of cells. Thus, it is either
scaled up, or performed in multiple to generate sufficient cells
for multiple 96 well plates. Jurkat cells are maintained in
RPMI+10% serum with 1% Pen-Strep. Combine 2.5 mls of OPTI-MFM (Life
Technologies) with 10 ug of plasmid DNA in a T25 flask. Add 2.5 ml
OPTI-MEM containing 50 ul of DMRIE-C and incubate at room
temperature for 15-45 mins.
[0965] During the incubation period, count cell concentration, spin
down the required number of cells (10.sup.7 per transfection), and
resuspend in OPTI-MEM to a final concentration of 10.sup.7
cells/ml. Then add 1 ml of 1.times.10.sup.7 cells in OPTI-MEM to
T25 flask and incubate at 37 degree C. for 6 hrs. After the
incubation, add 10 ml of RPMI+15% serum.
[0966] The Jurkat:GAS-SEAP stable reporter lines are maintained in
RPMI+10% serum, 1 mg/ml Genticin, and 1% Pen-Strep. These cells are
treated with varying concentrations of one or more fusion proteins
of the present invention.
[0967] On the day of treatment with the fusion protein, the cells
should be washed and resuspended in fresh RPMI+10% serum to a
density of 500,000 cells per ml. The exact number of cells required
will depend on the number of fusion proteins and the number of
different concentrations of fusion proteins being screened. For one
96 well plate, approximately 10 million cells (for 10 plates, 100
million cells) are required.
[0968] The well dishes containing Jurkat cells treated with the
fusion protein are placed in an incubator for 48 hrs (note: this
time is variable between 48-72 hrs). 35 ul samples from each well
are then transferred to an opaque 96 well plate using a 12 channel
pipette. The opaque plates should be covered (using sellophene
covers) and stored at -20 degree C. until SEAP assays are performed
according to Example 30. The plates containing the remaining
treated cells are placed at 4 degree C. and serve as a source of
material for repeating the assay on a specific well if desired.
[0969] As a positive control, 100 Unit/ml interferon gamma can be
used which is known to activate Jurkat T cells. Over 30 fold
induction is typically observed in the positive control wells.
[0970] The above protocol may be used in the generation of both
transient, as well as, stable transfected cells, which would be
apparent to those of skill in the art.
Example 33
Assay for T-Cell Activity
[0971] NF-KB (Nuclear Factor KB) is a transcription factor
activated by a wide variety of agents including the inflammatory
cytokines IL-1 and TNF, CD30 and CD40, lymphotoxin-alpha and
lymphotoxin-beta, by exposure to LPS or thrombin, and by expression
of certain viral gene products. As a transcription factor, NF-KB
regulates the expression of genes involved in immune cell
activation, control of apoptosis (NF-KB appears to shield cells
from apoptosis), B and T-cell development, anti-viral and
antimicrobial responses, and multiple stress responses.
[0972] In non-stimulated conditions, NF-KB is retained in the
cytoplasm with I-KB (Inhibitor KB). However, upon stimulation, I-KB
is phosphorylated and degraded, causing NF-KB to shuttle to the
nucleus, thereby activating transcription of target genes. Target
genes activated by NF-KB include IL-2, IL-6, GM-CSF, ICAM-1 and
class 1 MHC.
[0973] Due to its central role and ability to respond to a range of
stimuli, reporter constructs utilizing the NF-KB promoter element
are used to screen the fusion protein. Activators or inhibitors of
NF-KB would be useful in treating, preventing, and/or diagnosing
diseases. For example, inhibitors of NF-KB could be used to treat
those diseases related to the acute or chronic activation of NF-KB,
such as rheumatoid arthritis.
[0974] To construct a vector containing the NF-KB promoter element,
a PCR based strategy is employed. The upstream primer contains four
tandem copies of the NF-KB binding site (GGGGACTTTCCC) (SEQ ID NO:
43), 18 by of sequence complementary to the 5' end of the SV40
early promoter sequence, and is flanked with an XhoI site:
TABLE-US-00019 (SEQ ID NO: 44) 5':
GCGGCCTCGAGGGGACTTTCCCGGGGACTTTCCGGGGACTTTCCGG
GACTTTCCATCCTGCCATCTCAATTAG: 3'
[0975] The downstream primer is complementary to the 3' end of the
SV40 promoter and is flanked with a Hind III site:
TABLE-US-00020 (SEQ ID NO: 39) 5': GCGGCAAGCTTTTTGCAAAGCCTAGGC:
3'
[0976] PCR amplification is performed using the SV40 promoter
template present in the pB-gal:promoter plasmid obtained from
Clontech. The resulting PCR fragment is digested with XhoI and Hind
III and subcloned into BLSK2-. (Stratagene) Sequencing with the T7
and T3 primers confirms the insert contains the following
sequence:
TABLE-US-00021 (SEQ ID NO: 45) 5':
CTCGAGGGGACTTTCCCGGGGACTTTCCGGGGACTTTCCGGGACTT
TCCATCTGCCATCTCAATTAGTCAGCAACCATAGTCCCGCCCCTAACTCC
GCCCATCCCGCCCCTAACTCCGCCCAGTTCCGCCCATTCTTCCGCCCCAT
GGCTGACTAATTTTTTTTATTTATGCAGAGGCCGAGGCCGCCTCGGCCTC
TGAGCTATTCCAGAAGTAGTGAGGAGGCTTTTTTGGAGGCCTAGGCTTTT GCAAAAAGCTT:
3'
[0977] Next, replace the SV40 minimal promoter element present in
the pSEAP2-promoter plasmid (Clontech) with this NF-KB/SV40
fragment using XhoI and HindIII. However, this vector does not
contain a neomycin resistance gene, and therefore, is not preferred
for mammalian expression systems.
[0978] In order to generate stable mammalian cell lines, the
NF-KB/SV40/SEAP cassette is removed from the above NF-KB/SEAP
vector using restriction enzymes SalI and NotI, and inserted into a
vector containing neomycin resistance. Particularly, the
NF-KB/SV40/SEAP cassette was inserted into pGFP-1 (Clontech),
replacing the GFP gene, after restricting pGFP-1 with SalI and
NotI.
[0979] Once NF-KB/SV40/SEAP/Neo vector is created, stable Jurkat
T-cells are created and maintained according to the protocol
described in Example 32. Similarly, the method for assaying fusion
proteins with these stable Jurkat T-cells is also described in
Example 32. As a positive control, exogenous TNF alpha (0.1,1, 10
ng) is added to wells H9, H10, and H11, with a 5-10 fold activation
typically observed.
Example 33
Assay Identifying Myeloid Activity
[0980] The following protocol is used to assess myeloid activity of
an albumin fusion protein of the present invention by determining
whether the fusion protein proliferates and/or differentiates
myeloid cells. Myeloid cell activity is assessed using the
GAS/SEAP/Neo construct produced in Example 29. Thus, factors that
increase SEAP activity indicate the ability to activate the
Jaks-STATS signal transduction pathway. The myeloid cell used in
this assay is U937, a pre-monocyte cell line, although TF-1, HL60,
or KG1 can be used.
[0981] To transiently transfect U937 cells with the GAS/SEAP/Neo
construct produced in Example 29, a DEAE-Dextran method (Kharbanda
et. al., 1994, Cell Growth & Differentiation, 5:259-265) is
used. First, harvest 2.times.10.sup.7 U937 cells and wash with PBS.
The U937 cells are usually grown in RPMI 1640 medium containing 10%
heat-inactivated fetal bovine serum (FBS) supplemented with 100
units/ml penicillin and 100 mg/ml streptomycin.
[0982] Next, suspend the cells in 1 ml of 20 mM Tris-HCl (pH 7.4)
buffer containing 0.5 mg/ml DEAE-Dextran, 8 ug GAS-SEAP2 plasmid
DNA, 140 mM NaCl, 5 mM KCl, 375 uM Na.sub.2HPO.sub.4.7H.sub.7O, 1
mM MgCl.sub.2, and 675 uM CaCl.sub.2. Incubate at 37 degrees C. for
45 min.
[0983] Wash the cells with RPMI 1640 medium containing 10% FBS and
then resuspend in 10 ml complete medium and incubate at 37 degree
C. for 36 hr.
[0984] The GAS-SEAP/U937 stable cells are obtained by growing the
cells in 400 ug/ml G418. The G418-free medium is used for routine
growth but every one to two months, the cells should be re-grown in
400 ug/ml G418 for couple of passages.
[0985] These cells are tested by harvesting 1.times.10.sup.8 cells
(this is enough for ten 96-well plates assay) and wash with PBS.
Suspend the cells in 200 ml above described growth medium, with a
final density of 5.times.10.sup.5 cells/ml. Plate 200 ul cells per
well in the 96-well plate (or 1.times.10.sup.5 cells/well).
[0986] Add different concentrations of the fusion protein. Incubate
at 37 degee C. for 48 to 72 hr. As a positive control, 100 Unit/ml
interferon gamma can be used which is known to activate U937 cells.
Over 30 fold induction is typically observed in the positive
control wells. SEAP assay the supernatant according to methods
known in the art and/or the protocol described in Example 30.
Example 34
Assay Identifying Changes in Small Molecule Concentration and
Membrane Permeability
[0987] Binding of a ligand to a receptor is known to alter
intracellular levels of small molecules, such as calcium,
potassium, sodium, and pH, as well as alter membrane potential.
These alterations can be measured in an assay to identify fusion
proteins which bind to receptors of a particular cell. Although the
following protocol describes an assay for calcium, this protocol
can easily be modified to detect changes in potassium, sodium, pH,
membrane potential, or any other small molecule which is detectable
by a fluorescent probe.
[0988] The following assay uses Fluorometric Imaging Plate Reader
("FLIPR") to measure changes in fluorescent molecules (Molecular
Probes) that bind small molecules. Clearly, any fluorescent
molecule detecting a small molecule can be used instead of the
calcium fluorescent molecule, fluo-4 (Molecular Probes, Inc.;
catalog no. F-14202), used here.
[0989] For adherent cells, seed the cells at 10,000-20,000
cells/well in a Co-star black 96-well plate with clear bottom. The
plate is incubated in a CO.sub.2 incubator for 20 hours. The
adherent cells are washed two times in Biotek washer with 200 ul of
HBSS (Hank's Balanced Salt Solution) leaving 100 ul of buffer after
the final wash.
[0990] A stock solution of 1 mg/ml fluo-4 is made in 10% pluronic
acid DMSO. To load the cells with fluo-4, 50 ul of 12 ug/ml fluo-4
is added to each well. The plate is incubated at 37 degrees C. in a
CO.sub.2 incubator for 60 min. The plate is washed four times in
the Biotek washer with HBSS leaving 100 ul of buffer.
[0991] For non-adherent cells, the cells are spun down from culture
media. Cells are re-suspended to 2-5.times.10.sup.6 cells/ml with
HBSS in a 50-ml conical tube. 4 ul of 1 mg/ml fluo-4 solution in
10% pluronic acid DMSO is added to each ml of cell suspension. The
tube is then placed in a 37 degrees C. water bath for 30-60 min.
The cells are washed twice with HBSS, resuspended to
1.times.10.sup.6 cells/ml, and dispensed into a microplate, 100
ul/well. The plate is centrifuged at 1000 rpm for 5 min. The plate
is then washed once in Denley Cell Wash with 200 ul, followed by an
aspiration step to 100 ul final volume.
[0992] For a non-cell based assay, each well contains a fluorescent
molecule, such as fluo-4. The fusion protein of the invention is
added to the well, and a change in fluorescence is detected.
[0993] To measure the fluorescence of intracellular calcium, the
FLIPR is set for the following parameters: (1) System gain is
300-800 mW; (2) Exposure time is 0.4 second; (3) Camera F/stop is
F/2; (4) Excitation is 488 nm; (5) Emission is 530 nm; and (6)
Sample addition is 50 ul. Increased emission at 530 nm indicates an
extracellular signaling event caused by an albumin fusion protein
of the present invention or a molecule induced by an albumin fusion
protein of the present invention, which has resulted in an increase
in the intracellular Ca++ concentration.
Example 35
Assay Identifying Tyrosine Kinase Activity
[0994] The Protein Tyrosine Kinases (PTK) represent a diverse group
of transmembrane and cytoplasmic kinases. Within the Receptor
Protein Tyrosine Kinase (RPTK) group are receptors for a range of
mitogenic and metabolic growth factors including the PDGF, FGF,
EGF, NGF, HGF and Insulin receptor subfamilies. In addition there
are a large family of RPTKs for which the corresponding ligand is
unknown. Ligands for RPTKs include mainly secreted small proteins,
but also membrane-bound and extracellular matrix proteins.
[0995] Activation of RPTK by ligands involves ligand-mediated
receptor dimerization, resulting in transphosphorylation of the
receptor subunits and activation of the cytoplasmic tyrosine
kinases. The cytoplasmic tyrosine kinases include receptor
associated tyrosine kinases of the src-family (e.g., src, yes, lck,
lyn, fyn) and non-receptor linked and cytosolic protein tyrosine
kinases, such as the Jak family, members of which mediate signal
transduction triggered by the cytokine superfamily of receptors
(e.g., the Interleukins, Interferons, GM-CSF, and Leptin).
[0996] Because of the wide range of known factors capable of
stimulating tyrosine kinase activity, identifying whether an
albumin fusion protein of the present invention or a molecule
induced by a fusion proetin of the present invention is capable of
activating tyrosine kinase signal transduction pathways is of
interest. Therefore, the following protocol is designed to identify
such molecules capable of activating the tyrosine kinase signal
transduction pathways.
[0997] Seed target cells (e.g., primary keratinocytes) at a density
of approximately 25,000 cells per well in a 96 well Loprodyne
Silent Screen Plates purchased from Nalge Nunc (Naperville, Ill.).
The plates are sterilized with two 30 minute rinses with 100%
ethanol, rinsed with water and dried overnight. Some plates are
coated for 2 hr with 100 ml of cell culture grade type I collagen
(50 mg/ml), gelatin (2%) or polylysine (50 mg/ml), all of which can
be purchased from Sigma Chemicals (St. Louis, Mo.) or 10% Matrigel
purchased from Becton Dickinson (Bedford, Mass.), or calf serum,
rinsed with PBS and stored at 4 degree C. Cell growth on these
plates is assayed by seeding 5,000 cells/well in growth medium and
indirect quantitation of cell number through use of alamarBlue as
described by the manufacturer Alamar Biosciences, Inc. (Sacramento,
Calif.) after 48 hr. Falcon plate covers #3071 from Becton
Dickinson (Bedford, Mass.) are used to cover the Loprodyne Silent
Screen Plates. Falcon Microtest III cell culture plates can also be
used in some proliferation experiments.
[0998] To prepare extracts, A431 cells are seeded onto the nylon
membranes of Loprodyne plates (20,000/200 ml/well) and cultured
overnight in complete medium. Cells are quiesced by incubation in
serum-free basal medium for 24 hr. After 5-20 minutes treatment
with EGF (60 ng/ml) or a different concentrations of an albumin
fusion protein of the invention, the medium was removed and 100 ml
of extraction buffer ((20 mM HEPES pH 7.5, 0.15 M NaCl, 1% Triton
X-100, 0.1% SDS, 2 mM Na3VO4, 2 mM Na4P2O7 and a cocktail of
protease inhibitors (#1836170) obtained from Boeheringer Mannheim
(Indianapolis, Ind.)) is added to each well and the plate is shaken
on a rotating shaker for 5 minutes at 4.degree. C. The plate is
then placed in a vacuum transfer manifold and the extract filtered
through the 0.45 mm membrane bottoms of each well using house
vacuum. Extracts are collected in a 96-well catch/assay plate in
the bottom of the vacuum manifold and immediately placed on ice. To
obtain extracts clarified by centrifugation, the content of each
well, after detergent solubilization for 5 minutes, is removed and
centrifuged for 15 minutes at 4 degree C. at 16,000.times.g.
[0999] Test the filtered extracts for levels of tyrosine kinase
activity. Although many methods of detecting tyrosine kinase
activity are known, one method is described here.
[1000] Generally, the tyrosine kinase activity of an albumin fusion
protein of the invention is evaluated by deter ruining its ability
to phosphorylate a tyrosine residue on a specific substrate (a
biotinylated peptide). Biotinylated peptides that can be used for
this purpose include PSK1 (corresponding to amino acids 6-20 of the
cell division kinase cdc2-p34) and PSK2 (corresponding to amino
acids 1-17 of gastrin). Both peptides are substrates for a range of
tyrosine kinases and are available from Boehringer Mannheim.
[1001] The tyrosine kinase reaction is set up by adding the
following components in order. First, add 10 ul of 5 uM
Biotinylated Peptide, then 10 ul ATP/Mg.sub.2+ (5 mM ATP/50 mM
MgCl.sub.2), then 10 ul of 5.times. Assay Buffer (40 mM imidazole
hydrochloride, pH7.3, 40 mM beta-glycerophosphate, 1 mM EGTA, 100
mM MgCl.sub.2, 5 mM MnCl.sub.2, 0.5 mg/ml BSA), then 5 ul of Sodium
Vanadate (1 mM), and then 5 ul of water. Mix the components gently
and preincubate the reaction mix at 30 degree C. for 2 min. Initial
the reaction by adding 10 ul of the control enzyme or the filtered
supernatant.
[1002] The tyrosine kinase assay reaction is then terminated by
adding 10 ul of 120 mm EDTA and place the reactions on ice.
[1003] Tyrosine kinase activity is determined by transferring 50 ul
aliquot of reaction mixture to a microtiter plate (MTP) module and
incubating at 37 degree C. for 20 min. This allows the streptavidin
coated 96 well plate to associate with the biotinylated peptide.
Wash the MTP module with 300 ul/well of PBS four times. Next add 75
ul of anti-phospotyrosine antibody conjugated to horse radish
peroxidase(anti-P-Tyr-POD(0.5 u/ml)) to each well and incubate at
37 degree C. for one hour. Wash the well as above.
[1004] Next add 100 ul of peroxidase substrate solution (Boehringer
Mannheim) and incubate at room temperature for at least 5 mins (up
to 30 min). Measure the absorbance of the sample at 405 nm by using
ELISA reader. The level of bound peroxidase activity is quantitated
using an ELISA reader and reflects the level of tyrosine kinase
activity.
Example 36
Assay Identifying Phosphorylation Activity
[1005] As a potential alternative and/or complement to the assay of
protein tyrosine kinase activity described in Example 35, an assay
which detects activation (phosphorylation) of major intracellular
signal transduction intermediates can also be used. For example, as
described below one particular assay can detect tyrosine
phosphorylation of the Erk-1 and Erk-2 kinases. However,
phosphorylation of other molecules, such as Raf, JNK, p38 MAP, Map
kinase kinase (MEK), MEK kinase, Src, Muscle specific kinase
(MuSK), IRAK, Tec, and Janus, as well as any other phosphoserine,
phosphotyrosine, or phosphothreonine molecule, can be detected by
substituting these molecules for Erk-1 or Erk-2 in the following
assay.
[1006] Specifically, assay plates are made by coating the wells of
a 96-well ELISA plate with 0.1 ml of protein G (1 ug/ml) for 2 hr
at room temp, (RT). The plates are then rinsed with PBS and blocked
with 3% BSA/PBS for 1 hr at RT. The protein G plates are then
treated with 2 commercial monoclonal antibodies (100 ng/well)
against Erk-1 and Erk-2 (1 hr at RT)
[1007] (Santa Cruz Biotechnology). (To detect other molecules, this
step can easily be modified by substituting a monoclonal antibody
detecting any of the above described molecules.) After 3-5 rinses
with PBS, the plates are stored at 4 degree C. until use.
[1008] A431 cells are seeded at 20,000/well in a 96-well Loprodyne
filterplate and cultured overnight in growth medium. The cells are
then starved for 48 hr in basal medium (DMEM) and then treated with
EGF (6 ng/well) or varying concentrations of the fusion protein of
the invention for 5-20 minutes. The cells are then solubilized and
extracts filtered directly into the assay plate.
[1009] After incubation with the extract for 1 hr at RT, the wells
are again rinsed. As a positive control, a commercial preparation
of MAP kinase (10 ng/well) is used in place of A431 extract. Plates
are then treated with a commercial polyclonal (rabbit) antibody (1
ug/ml) which specifically recognizes the phosphorylated epitope of
the Erk-1 and Erk-2 kinases (1 hr at RT). This antibody is
biotinylated by standard procedures. The bound polyclonal antibody
is then quantitated by successive incubations with
Europium-streptavidin and Europium fluorescence enhancing reagent
in the Wallac DELFIA instrument (time-resolved fluorescence). An
increased fluorescent signal over background indicates a
phosphorylation by the fusion protein of the present invention or a
molecule induced by an albumin fusion protein of the present
invention.
Example 37
Assay for the Stimulation of Bone Marrow CD34+ Cell
Proliferation
[1010] This assay is based on the ability of human CD34+ to
proliferate in the presence of hematopoietic growth factors and
evaluates the ability of fusion proteins of the inventon to
stimulate proliferation of CD34+ cells.
[1011] It has been previously shown that most mature precursors
will respond to only a single signal. More immature precursors
require at least two signals to respond. Therefore, to test the
effect of fusion proteins of the invention on hematopoietic
activity of a wide range of progenitor cells, the assay contains a
given fusion protein of the invention in the presence or absence of
hematopoietic growth factors. Isolated cells are cultured for 5
days in the presence of Stem Cell Factor (SCF) in combination with
tested sample. SCF alone has a very limited effect on the
proliferation of bone marrow (BM) cells, acting in such conditions
only as a "survival", factor. However, combined with any factor
exhibiting stimulatory effect on these cells (e.g., IL-3), SCF will
cause a synergistic effect. Therefore, if the tested fusion protein
has a stimulatory effect on hematopoietic progenitors, such
activity can be easily detected. Since normal BM cells have a low
level of cycling cells, it is likely that any inhibitory effect of
a given fusion protein might not be detected. Accordingly, assays
for an inhibitory effect on progenitors is preferably tested in
cells that are first subjected to in vitro stimulation with
SCF+IL+3, and then contacted with the compound that is being
evaluated for inhibition of such induced proliferation.
[1012] Briefly, CD34+ cells are isolated using methods known in the
art. The cells are thawed and resuspended in medium (QBSF 60
serum-free medium with 1% L-glutamine (500 ml) Quality Biological,
Inc., Gaithersburg, Md. Cat #160-204-101). After several gentle
centrifugation steps at 200.times.g, cells are allowed to rest for
one hour. The cell count is adjusted to 2.5.times.10.sup.5
cells/ml. During this time, 100 .mu.l of sterile water is added to
the peripheral wells of a 96-well plate. The cytokines that can be
tested with an albumin fusion protein of the invention in this
assay is rhSCF (R&D Systems, Minneapolis, Minn., Cat #255-SC)
at 50 ng/ml alone and in combination with rhSCF and rhIL-3 (R&D
Systems, Minneapolis, Minn., Cat #203-ML) at 30 ng/ml. After one
hour, 10 .mu.l of prepared cytokines, varying concentrations of an
albumin fusion protein of the invention, and 20 .mu.l of diluted
cells are added to the media which is already present in the wells
to allow for a final total volume of 100 .mu.l. The plates are then
placed in a 37.degree. C./5% CO.sub.2 incubator for five days.
[1013] Eighteen hours before the assay is harvested, 0.5
.mu.Ci/well of [3H] Thymidine is added in a 10 .mu.l volume to each
well to determine the proliferation rate. The experiment is
terminated by harvesting the cells from each 96-well plate to a
filtermat using the Tomtec Harvester 96. After harvesting, the
filtermats are dried, trimmed and placed into OmniFilter assemblies
consisting of one OmniFilter plate and one OmniFilter Tray. 60
.mu.l Microscint is added to each well and the plate sealed with
TopSeal-A press-on sealing film A bar code 15 sticker is affixed to
the first plate for counting. The sealed plates are then loaded and
the level of radioactivity determined via the Packard Top Count and
the printed data collected for analysis. The level of radioactivity
reflects the amount of cell proliferation.
[1014] The studies described in this example test the activity of a
given fusion protein to stimulate bone marrow CD34+ cell
proliferation. One skilled in the art could easily modify the
exemplified studies to test the activity of fusion porteins and
polynucleotides of the invention (e.g., gene therapy) as well as
agonists and antagonists thereof. The ability of an albumin
fusion.protein of the invention to stimulate the proliferation of
bone marrow CD34+ cells indicates that the albumin fusion protein
and/or polynucleotides corresponding to the fusion protein are
useful for the diagnosis and treatment of disorders affecting the
immune system and hematopoiesis. Representative uses are described
in the "Immune Activity" and "Infectious Disease" sections above,
and elsewhere herein.
Example 38
Assay for Extracellular Matrix Enhanced Cell Response (EMECR)
[1015] The objective of the Extracellular Matrix Enhanced Cell
Response (EMECR) assay is to evaluate the ability of fusion
proteins of the invention to act on hematopoietic stem cells in the
context of the extracellular matrix (ECM) induced signal.
[1016] Cells respond to the regulatory factors in the context of
signal(s) received from the surrounding microenvironment. For
example, fibroblasts, and endothelial and epithelial stem cells
fail to replicate in the absence of signals from the ECM.
Hematopoietic stem cells can undergo self-renewal in the bone
marrow, but not in in vitro suspension culture. The ability of stem
cells to undergo self-renewal in vitro is dependent upon their
interaction with the stromal cells and the ECM protein fibronectin
(fn). Adhesion of cells to fn is mediated by the
.alpha..sub.5..beta..sub.1 and .alpha..sub.4..beta..sub.1 integrin
receptors, which are expressed by human and mouse hematopoietic
stem cells. The factor(s) which integrate with the ECM environment
and are responsible for stimulating stem cell self-renewal havea
not yet been identified. Discovery of such factors should be of
great interest in gene therapy and bone marrow transplant
applications
[1017] Briefly, polystyrene, non tissue culture treated, 96-well
plates are coated with fn fragment at a coating concentration of
0.2 .mu.g/cm.sup.2. Mouse bone marrow cells are plated (1,000
cells/well) in 0.2 ml of serum-free medium. Cells cultured in the
presence of IL-3 (5 ng/ml)+SCF (50 ng/ml) would serve as the
positive control, conditions under which little self-renewal but
pronounced differentiation of the stem cells is to be expected.
Albumin fusion proteins of the invention are tested with
appropriate negative controls in the presence and absence of
SCF(5.0 ng/ml), where volume of the administed composition
containing the albumin fusion protein of the invention represents
10% of the total assay volume. The plated cells are then allowed to
grow by incubating in a low oxygen environment (5% CO.sub.2, 7%
O.sub.2, and 88% N.sub.2) tissue culture incubator for 7 days. The
number of proliferating cells within the wells is then quantitated
by measuring thymidine incorporation into cellular DNA.
Verification of the positive hits in the assay will require
phenotypic characterization of the cells, which can be accomplished
by scaling up of the culture system and using appropriate antibody
reagents against cell surface antigens and FACScan.
[1018] One skilled in the art could easily modify the exemplified
studies to test the activity of albumin fusion proteins and
polynucleotides of the invention (e.g., gene therapy).
[1019] If a particular fusion protein of the present invention is
found to be a stimulator of hematopoietic progenitors, the fusion
protein and polynucleotides corresponding to the fusion protein may
be useful for example, in the diagnosis and treatment of disorders
affecting the immune system and hematopoiesis. Representative uses
are described in the "Immune Activity" and "Infectious Disease"
sections above, and elsewhere herein. The fusion protein may also
be useful in the expansion of stem cells and committed progenitors
of various blood lineages, and in the differentiation and/or
proliferation of various cell types.
[1020] Additionally, the albumin fusion proteins of the invention
and polynucleotides encoding albumin fusion proteins of the
invention, may also be employed to inhibit the proliferation and
differentiation of hematopoietic cells and therefore may be
employed to protect bone marrow stem cells from chemotherapeutic
agents during chemotherapy. This antiproliferative effect may allow
administration of higher doses of chemotherapeutic agents and,
therefore, more effective chemotherapeutic treatment.
[1021] Moreover, fusion proteins of the invention and
polynucleotides encoding albumin fusion proteins of the invention
may also be useful for the treatment and diagnosis of hematopoietic
related disorders such as, anemia, pancytopenia, leukopenia,
thrombocytopenia or leukemia, since stromal cells are important in
the production of cells of hematopoietic lineages. The uses include
bone marrow cell ex-vivo culture, bone marrow transplantation, bone
marrow reconstitution, radiotherapy or chemotherapy of
neoplasia.
Example 39
Human Dermal Fibroblast and Aortic Smooth Muscle Cell
Proliferation
[1022] An albumin fusion protein of the invention is added to
cultures of normal human dermal fibroblasts (NHDF) and human aortic
smooth muscle cells (AoSMC) and two co-assays are performed with
each sample. The first assay examines the effect of the fusion
protein on the proliferation of normal human dermal fibroblasts
(NHDF) or aortic smooth muscle cells (AoSMC). Aberrant growth of
fibroblasts or smooth muscle cells is a part of several
pathological processes, including fibrosis, and restenosis. The
second assay examines IL6 production by both NHDF and SMC. IL6
production is an indication of functional activation. Activated
cells will have increased production of a number of cytokines and
other factors, which can result in a proinflammatory or
immunomodulatory outcome. Assays are run with and without co-TNFa
stimulation, in order to check for costimulatory or inhibitory
activity.
[1023] Briefly, on day 1, 96-well black plates are set up with 1000
cells/well (NHDF) or 2000 cells/well (AoSMC) in 100 .mu.l culture
media. NHDF culture media contains: Clonetics FB basal media, 1
mg/ml hFGF, 5 mg/ml insulin, 50 mg/ml gentamycin, 2% FBS, while
AoSMC culture media contains Clonetics SM basal media, 0.5 .mu.g/ml
hEGF, 5 mg/ml insulin, 1 .mu.g/ml hFGF, 50 mg/ml gentamycin, 50
.mu.g/ml Amphotericin B, 5% FBS. After incubation at 37.degree. C.
for at least 4-5 hours culture media is aspirated and replaced with
growth arrest media. Growth arrest media for NHDF contains
fibroblast basal media, 50 mg/ml gentamycin, 2% FBS, while growth
arrest media for AoSMC contains SM basal media, 50 mg/ml
gentamycin, 50 .mu.g/ml Amphotericin B, 0.4% FBS. Incubate at
37.degree. C. until day 2.
[1024] On day 2, serial dilutions and templates of an albumin
fusion protein of the invention are designed such that they always
include media controls and known-protein controls. For both
stimulation and inhibition experiments, proteins are diluted in
growth arrest media. For inhibition experiments, TNFa is added to a
final concentration of 2 ng/ml (NHDF) or 5 ng/ml (AoSMC). Add 1/3
vol media containing controls or an albumin fusion protein of the
invention and incubate at 37 degrees C/5% CO.sub.2 until day 5.
[1025] Transfer 60 .mu.l from each well to another labeled 96-well
plate, cover with a plate-sealer, and store at 4 degrees C. until
Day 6 (for IL6 ELISA). To the remaining 100 .mu.l in the cell
culture plate, aseptically add Alamar Blue in an amount equal to
10% of the culture volume (10 .mu.l). Return plates to incubator
for 3 to 4 hours. Then measure fluorescence with excitation at 530
nm and emission at 590 nm using the CytoFluor. This yields the
growth stimulation/inhibition data.
[1026] On day 5, the IL6 ELISA is performed by coating a 96 well
plate with 50-100 ul/well of Anti-Human IL6 Monoclonal antibody
diluted in PBS, pH 7.4, incubate ON at room temperature.
[1027] On day 6, empty the plates into the sink and blot on paper
towels. Prepare Assay Buffer containing PBS with 4% BSA. Block the
plates with 200 .mu.l/well of Pierce Super Block blocking buffer in
PBS for 1-2 hr and then wash plates with wash buffer (PBS, 0.05%
Tween-20). Blot plates on paper towels. Then add 50 .mu.l/well of
diluted Anti-Human IL-6 Monoclonal, Biotin-labeled antibody at 0.50
mg/ml. Make dilutions of IL-6 stock in media (30, 10, 3, 1, 0.3, 0
ng/ml). Add duplicate samples to top row of plate. Cover the plates
and incubate for 2 hours at RT on shaker.
[1028] Plates are washed with wash buffer and blotted on paper
towels. Dilute EU-labeled Streptavidin 1:1000 in Assay buffer, and
add 100 .mu.l/well. Cover the plate and incubate 1 h at RT. Plates
are again washed with wash buffer and blotted on paper towels.
[1029] Add 100 .mu.l/well of Enhancement Solution. Shake for 5
minutes. Read the plate on the Wallac DELFIA Fluorometer. Readings
from triplicate samples in each assay were tabulated and
averaged.
[1030] A positive result in this assay suggests AoSMC cell
proliferation and that the albumin fusion protein may be involved
in dermal fibroblast proliferation and/or smooth muscle cell
proliferation. A positive result also suggests many potential uses
of the fusion protein and polynucleotides encoding the albumin
fusion protein. For example, inflammation and immune responses,
wound healing, and angiogenesis, as detailed throughout this
specification. Particularly, fusion proteins may be used in wound
healing and dermal regeneration, as well as the promotion of
vasculogenesis, both of the blood vessels and lymphatics. The
growth of vessels can be used in the treatment of, for example,
cardiovascular diseases. Additionally, fusion proteins showing
antagonistic activity in this assay may be useful in treating
diseases, disorders, and/or conditions which involve angiogenesis
by acting as an anti-vascular agent (e.g., anti-angiogenesis).
These diseases, disorders, and/or conditions are known in the art
and/or are described herein, such as, for example, malignancies,
solid tumors, benign tumors, for example hemangiomas, acoustic
neuromas, neurofibromas, trachomas, and pyogenic granulomas;
artheroscleric plaques; ocular angiogenic diseases, for example,
diabetic retinopathy, retinopathy of prematurity, macular
degeneration, corneal graft rejection, neovascular glaucoma,
retrolental fibroplasia, rubeosis, retinoblastoma, uvietis and
Pterygia (abnormal blood vessel growth) of the eye; rheumatoid
arthritis; psoriasis; delayed wound healing; endometriosis;
vasculogenesis; granulations; hypertrophic scars (keloids);
nonunion fractures; scleroderma; trachoma; vascular adhesions;
myocardial angiogenesis; coronary collaterals; cerebral
collaterals; arteriovenous malformations; ischemic limb
angiogenesis; Osler-Webber Syndrome; plaque neovascularization;
telangiectasia; hemophiliac joints; angiofibroma; fibromuscular
dysplasia; wound granulation; Crohn's disease; and atherosclerosis.
Moreover, albumin fusion proteins that act as antagonists in this
assay may be useful in treating anti-hyperproliferative diseases
and/or anti-inflammatory known in the art and/or described
herein.
Example 40
Cellular Adhesion Molecule (CAM) Expression on Endothelial
Cells
[1031] The recruitment of lymphocytes to areas of inflammation and
angiogenesis involves specific receptor-ligand interactions between
cell surface adhesion molecules (CAMs) on lymphocytes and the
vascular endothelium. The adhesion process, in both normal and
pathological settings, follows a multi-step cascade that involves
intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion
molecule-1 (VCAM-1), and endothelial leukocyte adhesion molecule-1
(E-selectin) expression on endothelial cells (EC). The expression
of these molecules and others on the vascular endothelium
determines the efficiency with which leukocytes may adhere to the
local vasculature and extravasate into the local tissue during the
development of an inflammatory response. The local concentration of
cytokines and growth factor participate in the modulation of the
expression of these CAMs.
[1032] Briefly, endothelial cells (e.g., Human Umbilical Vein
Endothelial cells (HUVECs)) are grown in a standard 96 well plate
to confluence, growth medium is removed from the cells and replaced
with 100 .mu.l of 199 Medium (10% fetal bovine serum (FBS)).
Samples for testing (containing an albumin fusion protein of the
invention) and positive or negative controls are added to the plate
in triplicate (in 10 .mu.l volumes). Plates are then incubated at
37.degree. C. for either 5 h (selectin and integrin expression) or
24 h (integrin expression only). Plates are aspirated to remove
medium and 100 .mu.l of 0.1% paraformaldehyde-PBS (with Ca++ and
Mg++) is added to each well. Plates are held at 4.degree. C. for 30
min. Fixative is removed from the wells and wells are washed
1.times. with PBS(+Ca,Mg)+0.5% BSA and drained. 10 .mu.l of diluted
primary antibody is added to the test and control wells.
Anti-ICAM-1-Biotin, Anti-VCAM-1-Biotin and Anti-E-selectin-Biotin
are used at a concentration of 10 .mu.g/ml (1:10 dilution of 0.1
mg/ml stock antibody). Cells are incubated at 37.degree. C. for 30
min. in a humidified environment. Wells are washed three times with
PBS(+Ca,Mg)+0.5% BSA. 20 .mu.l of diluted ExtrAvidin-Alkaline
Phosphatase (1:5,000 dilution, referred to herein as the working
dilution) are added to each well and incubated at 37.degree. C. for
30 min. Wells are washed three times with PBS(+Ca,Mg)+0.5% BSA.
Dissolve 1 tablet of p-Nitrophenol Phosphate pNPP per 5 ml of
glycine buffer (pH 10.4). 100 .mu.l of pNPP substrate in glycine
buffer is added to each test well. Standard wells in triplicate are
prepared from the working dilution of the ExtrAvidin-Alkaline
Phosphotase in glycine buffer: 1:5,000
(10.sup.0)>10.sup.-0.5>10.sup.-1>10.sup.-1.5. 5 .mu.l of
each dilution is added to triplicate wells and the resulting AP
content in each well is 5.50 ng, 1.74 ng, 0.55 ng, 0.18 ng. 100
.mu.l of pNNP reagent is then added to each of the standard wells.
The plate is incubated at 37.degree. C. for 4 h. A volume of 50
.mu.l of 3M NaOH is added to all wells. The plate is read on a
plate reader at 405 nm using the background subtraction option on
blank wells filled with glycine buffer only. Additionally, the
template is set up to indicate the concentration of AP-conjugate in
each standard well [5.50 ng; 1.74 ng; 0.55 ng; 0.18 ng]. Results
are indicated as amount of bound AP-conjugate in each sample.
Example 41
Alamar Blue Endothelial Cells Proliferation Assay
[1033] This assay may be used to quantitatively determine protein
mediated inhibition of bFGF-induced proliferation of Bovine
Lymphatic Endothelial Cells (LECs), Bovine Aortic Endothelial Cells
(BAECs) or Human Microvascular Uterine Myometrial Cells (UTMECs).
This assay incorporates a fluorometric growth indicator based on
detection of metabolic activity. A standard Alamar Blue
Proliferation Assay is prepared in EGM-2MV with 10 ng/ml of bFGF
added as a source of endothelial cell stimulation. This assay may
be used with a variety of endothelial cells with slight changes in
growth medium and cell concentration. Dilutions of protein batches
to be tested are diluted as appropriate. Serum-free medium (GIBCO
SFM) without bFGF is used as a non-stimulated control and
Angiostatin or TSP-1 are included as a known inhibitory
controls.
[1034] Briefly, LEC, BAECs or UTMECs are seeded in growth media at
a density of 5000 to 2000 cells/well in a 96 well plate and placed
at 37 degrees C. overnight. After the overnight incubation of the
cells, the growth media is removed and replaced with GIBCO EC-SFM.
The cells are treated with the appropriate dilutions of an albumin
fusion protein of the invention or control protein sample(s)
(prepared in SFM) in triplicate wells with additional bFGF to a
concentration of 10 ng/ ml. Once the cells have been treated with
the samples, the plate(s) is/are placed back in the 37.degree. C.
incubator for three days. After three days 10 ml of stock alamar
blue (Biosource Cat #DAL1100) is added to each well and the
plate(s) is/are placed back in the 37.degree. C. incubator for four
hours. The plate(s) are then read at 530 nm excitation and 590 nm
emission using the CytoFluor fluorescence reader. Direct output is
recorded in relative fluorescence units.
[1035] Alamar blue is an oxidation-reduction indicator that both
fluoresces and changes color in response to chemical reduction of
growth medium resulting from cell growth. As cells grow in culture,
innate metabolic activity results in a chemical reduction of the
immediate surrounding environment. Reduction related to growth
causes the indicator to change from oxidized (non-fluorescent blue)
form to reduced (fluorescent red) form (i.e., stimulated
proliferation will produce a stronger signal and inhibited
proliferation will produce a weaker signal and the total signal is
proportional to the total number of cells as well as their
metabolic activity). The background level of activity is observed
with the starvation medium alone. This is compared to the output
observed from the positive control samples (bFGF in growth medium)
and protein dilutions.
Example 42
Detection of Inhibition of a Mixed Lymphocyte Reaction
[1036] This assay can be used to detect and evaluate inhibition of
a Mixed Lymphocyte Reaction (MLR) by fusion proteins of the
invention. Inhibition of a MLR may be due to a direct effect on
cell proliferation and viability, modulation of costimulatory
molecules on interacting cells, modulation of adhesiveness between
lymphocytes and accessory cells, or modulation of cytokine
production by accessory cells. Multiple cells may be targeted by
the albumin fusion proteins that inhibit MLR since the peripheral
blood mononuclear fraction used in this assay includes T, B and
natural killer lymphocytes, as well as monocytes and dendritic
cells.
[1037] Albumin fusion proteins of the invention found to inhibit
the MLR may find application in diseases associated with lymphocyte
and monocyte activation or proliferation. These include, but are
not limited to, diseases such as asthma, arthritis, diabetes,
inflammatory skin conditions, psoriasis, eczema, systemic lupus
erythematosus, multiple sclerosis, glomerulonephritis, inflammatory
bowel disease, crohn's disease, ulcerative colitis,
arteriosclerosis, cirrhosis, graft vs. host disease, host vs. graft
disease, hepatitis, leukemia and lymphoma.
[1038] Briefly, PBMCs from human donors are purified by density
gradient centrifugation using Lymphocyte Separation Medium
(LSM.RTM., density 1.0770 g/ml, Organon Teknika Corporation, West
Chester, Pa.). PBMCs from two donors are adjusted to
2.times.10.sup.6 cells/ml in RPMI-1640 (Life Technologies, Grand
Island, N.Y.) supplemented with 10% FCS and 2 mM glutamine. PBMCs
from a third donor is adjusted to 2.times.10.sup.5 cells/ml. Fifty
microliters of PBMCs from each donor is added to wells of a 96-well
round bottom microtiter plate. Dilutions of the fusion protein test
material (50 .mu.l) is added in triplicate to microtiter wells.
Test samples (of the protein of interest) are added for final
dilution of 1:4; rhuIL-2 (R&D Systems, Minneapolis, Minn.,
catalog number 202-IL) is added to a final concentration of 1
.mu.g/ml; anti-CD4 mAb (R&D Systems, clone 34930.11, catalog
number MAB379) is added to a final concentration of 10 .mu.g/ml.
Cells are cultured for 7-8 days at 37.degree. C. in 5% CO.sub.2,
and 1 .mu.C of [.sup.3H] thymidine is added to wells for the last
16 hrs of culture. Cells are harvested and thymidine incorporation
determined using a Packard TopCount. Data is expressed as the mean
and standard deviation of triplicate determinations.
[1039] Samples of the fusion protein of interest are screened in
separate experiments and compared to the negative control
treatment, anti-CD4 mAb, which inhibits proliferation of
lymphocytes and the positive control treatment, IL-2 (either as
recombinant material or supernatant), which enhances proliferation
of lymphocytes.
Example 43
Assays for Protease Activity
[1040] The following assay may be used to assess protease activity
of an albumin fusion protein of the invention.
[1041] Gelatin and casein zymography are performed essentially as
described (Heusen et al., Anal. Biochem., 102:196-202 (1980);
Wilson et al., Journal of Urology, 149:653-658 (1993)). Samples are
run on 10% polyacryamide/0.1% SDS gels containing 1% gelain
orcasein, soaked in 2.5% triton at room temperature for 1 hour, and
in 0.1M glycine, pH 8.3 at 37.degree. C. 5 to 16-hours. After
staining in amido black areas of proteolysis apear as clear areas
agains the blue-black background. Trypsin (Sigma T8642) is used as
a positive control.
[1042] Protease activity is also determined by monitoring the
cleavage of n-a-benzoyl-L-arginine ethyl ester (BAEE) (Sigma
B-4500. Reactions are set up in (25 mMNaPO.sub.4, 1 mM EDTA, and 1
mM BAEE), pH 7.5. Samples are added and the change in adsorbance at
260 nm is monitored on the Beckman DU-6 spectrophotometer in the
time-drive mode. Trypsin is used as a positive control.
[1043] Additional assays based upon the release of acid-soluble
peptides from casein or hemoglobin measured as adsorbance at 280 nm
or colorimetrically using the Folin method are performed as
described in Bergmeyer, et al., Methods of Enzymatic Analysis, 5
(1984). Other assays involve the solubilization of chromogenic
substrates (Ward, Applied Science, 251-317 (1983)).
Example 44
Identifying Serine Protease Substrate Specificity
[1044] Methods known in the art or described herein may be used to
determine the substrate specificity of the albumin fusion proteins
of the present invention having serine protease activity. A
preferred method of determining substrate specificity is by the use
of positional scanning synthetic combinatorial libraries as
described in GB 2 324 529 (incorporated herein in its
entirety).
Example 45
Ligand Binding Assays
[1045] The following assay may be used to assess ligand binding
activity of an albumin fusion protein of the invention.
[1046] Ligand binding assays provide a direct method for
ascertaining receptor pharmacology and are adaptable to a high
throughput format. The purified ligand for an albumin fusion
protein of the invention is radiolabeled to high specific activity
(50-2000 Ci/mmol) for binding studies. A determination is then made
that the process of radiolabeling does not diminish the activity of
the ligand towards the fusion protein. Assay conditions for
buffers, ions, pH and other modulators such as nucleotides are
optimized to establish a workable signal to noise ratio for both
membrane and whole cell polypeptide sources. For these assays,
specific polypeptide binding is defined as total associated
radioactivity minus the radioactivity measured in the presence of
an excess of unlabeled competing ligand. Where possible, more than
one competing ligand is used to define residual nonspecific
binding.
Example 46
Functional Assay in Xenopus Oocytes
[1047] Capped RNA transcripts from linearized plasmid templates
encoding an albumin fusion protein of the invention is synthesized
in vitro with RNA polymerases in accordance with standard
procedures. In vitro transcripts are suspended in water at a final
concentration of 0.2 mg/mi. Ovarian lobes are removed from adult
female toads, Stage V defolliculated oocytes are obtained, and RNA
transcripts (10 ng/oocytc) are injected in a 50 nl bolus using a
microinjection apparatus. Two electrode voltage clamps are used to
measure the currents from individual Xenopus oocytes in response
fusion protein and polypeptide agonist exposure. Recordings are
made in Ca2+ free Barth's medium at room temperature. The Xenopus
system can be used to screen known ligands and tissue/cell extracts
for activating ligands.
Example 47
Microphysiometric Assays
[1048] Activation of a wide variety of secondary messenger systems
results in extrusion of small amounts of acid from a cell. The acid
formed is largely as a result of the increased metabolic activity
required to fuel the intracellular signaling process. The pH
changes in the media surrounding the cell are very small but are
detectable by the CYTOSENSOR microphysiometer (Molecular Devices
Ltd., Menlo Park, Calif.). The CYTOSENSOR is thus capable of
detecting the ability of an albumin fusion protein of the invention
to activate secondary messengers that are coupled to an energy
utilizing intracellular signaling pathway.
Example 48
Extract/Cell Supernatant Screening
[1049] A large number of mammalian receptors exist for which there
remains, as yet, no cognate activating ligand (agonist). Thus,
active ligands for these receptors may not be included within the
ligands banks as identified to date. Accordingly, the albumin
fusion proteins of the invention can also be functionally screened
(using calcium, cAMP, microphysiometer, oocyte electrophysiology,
etc., functional screens) against tissue extracts to identify
natural ligands for the Therapeutic protein portion and/or albumin
protein portion of an albumin fusion protein of the invention.
Extracts that produce positive functional responses can be
sequentially subfractionated until an activating ligand is isolated
and identified.
Example 49
ATP-Binding Assay
[1050] The following assay may be used to assess ATP-binding
activity of fusion proteins of the invention.
[1051] ATP-binding activity of an albumin fusion protein of the
invention may be detected using the ATP-binding assay described in
U.S. Pat. No. 5,858,719, which is herein incorporated by reference
in its entirety. Briefly, ATP-binding to an albumin fusion protein
of the invention is measured via photoaffinity labeling with
8-azido-ATP in a competition assay. Reaction mixtures containing 1
mg/ml of ABC transport protein are incubated with varying
concentrations of ATP, or the non-hydrolyzable ATP analog
adenyl-5'-imidodiphosphate for 10 minutes at 4.degree. C. A mixture
of 8-azido-ATP (Sigma Chem. Corp., St. Louis, Mo.) plus 8-azido-ATP
(.sup.32P-ATP) (5 mCi/.mu.mol, ICN, Irvine Calif.) is added to a
final concentration of 100 .mu.M and 0.5 ml aliquots are placed in
the wells of a porcelain spot plate on ice. The plate is irradiated
using a short wave 254 nm UV lamp at a distance of 2.5 cm from the
plate for two one-minute intervals with a one-minute cooling
interval in between. The reaction is stopped by addition of
dithiothreitol to a final concentration of 2 mM. The incubations
are subjected to SDS-PAGE electrophoresis, dried, and
autoradiographed. Protein bands corresponding to the albumin fusion
proteins of the invention are excised, and the radioactivity
quantified. A decrease in radioactivity with increasing ATP or
adenly-5'-imidodiphosphate provides a measure of ATP affinity to
the fusion protein.
Example 50
Phosphorylation Assay
[1052] In order to assay for phosphorylation activity of an albumin
fusion protein of the invention, a phosphorylation assay as
described in U.S. Pat. No. 5,958,405 (which is herein incorporated
by reference) is utilized. Briefly, phosphorylation activity may be
measured by phosphorylation of a protein substrate using
gamma-labeled .sup.32P-ATP and quantitation of the incorporated
radioactivity using a gamma radioisotope counter. The fusion
portein of the invention is incubated with the protein substrate,
.sup.32P-ATP, and a kinase buffer. The .sup.32P incorporated into
the substrate is then separated from free .sup.32P-ATP by
electrophoresis, and the incorporated .sup.32P is counted and
compared to a negative control. Radioactivity counts above the
negative control are indicative of phosphorylation activity of the
fusion protein.
Example 51
Detection of Phosphorylation Activity (Activation) of an Albumin
Fusion Protein of the Invention in the Presence of Polypeptide
Ligands
[1053] Methods known in the art or described herein may be used to
determine the phosphorylation activity of an albumin fusion protein
of the invention. A preferred method of determining phosphorylation
activity is by the use of the tyrosine phosphorylation assay as
described in U.S. Pat. No. 5,817,471 (incorporated herein by
reference).
Example 52
Identification of Signal Transduction Proteins that Interact with
an Albumin Fusion Protein of the Present Invention
[1054] Albumin fusion proteins of the invention may serve as
research tools for the identification, characterization and
purification of signal transduction pathway proteins or receptor
proteins. Briefly, a labeled fusion protein of the invention is
useful as a reagent for the purification of molecules with which it
interacts. In one embodiment of affinity purification, an albumin
fusion protein of the invention is covalently coupled to a
chromatography column. Cell-free extract derived from putative
target cells, such as carcinoma tissues, is passed over the column,
and molecules with appropriate affinity bind to the albumin fusion
protein. The protein complex is recovered from the column,
dissociated, and the recovered molecule subjected to N-terminal
protein sequencing. This amino acid sequence is then used to
identify the captured molecule or to design degenerate
oligonucleotide probes for cloning the relevant gene from an
appropriate cDNA library.
Example 53
IL-6 Bioassay
[1055] A variety of assays are known in the art for testing the
proliferative effects of an albumin fusion protein of the
invention. For example, one such asssay is the IL-6 Bioassay as
described by Marz et al. (Proc. Natl. Acad. Sci., U.S.A.,
95:3251-56 (1998), which is herein incorporated by reference).
After 68 hrs. at 37.degree. C., the number of viable cells is
measured by adding the tetrazolium salt thiazolyl blue (MTT) and
incubating for a further 4 hrs. at 37.degree. C. B9 cells are lysed
by SDS and optical density is measured at 570 nm. Controls
containing IL-6 (positive) and no cytokine (negative) are Briefly,
IL-6 dependent B9 murine cells are washed three times in IL-6 free
medium and plated at a concentration of 5,000 cells per well in 50
.mu.l, and 50 .mu.l of fusion protein of the invention is added.
utilized. Enhanced proliferation in the test sample(s) (containing
an albumin fusion protein of the invention) relative to the
negative control is indicative of proliferative effects mediated by
the fusion protein.
Example 54
Support of Chicken Embryo Neuron Survival
[1056] To test whether sympathetic neuronal cell viability is
supported by an albumin fusion protein of the invention, the
chicken embryo neuronal survival assay of Senaldi et al may be
utilized (Proc. Natl. Acad. Sci., U.S.A., 96:11458-63 (1998), which
is herein incorporated by reference). Briefly, motor and
sympathetic neurons are isolated from chicken embryos, resuspended
in L15 medium (with 10% FCS, glucose, sodium selenite,
progesterone, conalbumin, putrescine, and insulin; Life
Technologies, Rockville, Md.) and Dulbecco's modified Eagles medium
[with 10% FCS, glutamine, penicillin, and 25 mM Hepes buffer (pH
7.2); Life Technologies, Rockville, Md.], respectively, and
incubated at 37.degree. C. in 5% CO.sub.2 in the presence of
different concentrations of the purified fusion protein of the
invention, as well as a negative control lacking any cytokine.
After 3 days, neuron survival is determined by evaluation of
cellular morphology, and through the use of the colorimetric assay
of Mosmann (Mosmann, T., J. Immunol. Methods, 65:55-63 (1983)).
Enhanced neuronal cell viability as compared to the controls
lacking cytokine is indicative of the ability of the albumin fusion
protein to enhance the survival of neuronal cells.
Example 55
Assay for Phosphatase Activity
[1057] The following assay may be used to assess serine/threonine
phosphatase (PTPase) activity of an albumin fusion protein of the
invention.
[1058] In order to assay for serine/threonine phosphatase (PTPase)
activity, assays can be utilized which are widely known to those
skilled in the art. For example, the serine/threonine phosphatase
(PSPase) activity of an albumin fusion protein of the invention may
be measured using a PSPase assay kit from New England Biolabs, Inc.
Myelin basic protein (MyBP), a substrate for PSPase, is
phosphorylated on serine and threonine residues with cAMP-dependent
Protein Kinase in the presence of [.sup.32P]ATP. Protein
serine/threonine phosphatase activity is then determined by
measuring the release of inorganic phosphate from 32P-labeled
MyBP.
Example 56
Interaction of Serine/Threonine Phosphatases with Other
Proteins
[1059] Fusion protein of the invention having serine/threonine
phosphatase activity (e.g., as determined in Example 55) are
useful, for example, as research tools for the identification,
characterization and purification of additional interacting
proteins or receptor proteins, or other signal transduction pathway
proteins. Briefly, a labeled fusion protein of the invention is
useful as a reagent for the purification of molecules with which it
interacts. In one embodiment of affinity purification, an albumin
fusion protein of the invention is covalently coupled to a
chromatography column. Cell-free extract derived from putative
target cells, such as neural or liver cells, is passed over the
column, and molecules with appropriate affinity bind to the fusion
protein. The fusion protein-complex is recovered from the column,
dissociated, and the recovered molecule subjected to N-terminal
protein sequencing. This amino acid sequence is then used to
identify the captured molecule or to design degenerate
oligonucleotide probes for cloning the relevant gene from an
appropriate cDNA library.
Example 57
Assaying for Heparanase Activity
[1060] There a numerous assays known in the art that may be
employed to assay for heparanase activity of an albumin fusion
protein of the invention. In one example, heparanase activity of an
albumin fusion protein of the invention, is assayed as described by
Vlodaysky et al., (Vlodaysky et al., Nat. Med., 5:793-802 (1999)).
Briefly, cell lysates, conditioned media, intact cells
(1.times.10.sup.6 cells per 35-mm dish), cell culture supernatant,
or purified fusion protein are incubated for 18 hrs at 37.degree.
C., pH 6.2-6.6, with .sup.35S-labeled ECM or soluble ECM derived
peak I proteoglycans. The incubation medium is centrifuged and the
supernatant is analyzed by gel filtration on a Sepharose CL-6B
column (0.9.times.30 cm). Fractions are eluted with PBS and their
radioactivity is measured. Degradation fragments of heparan sulfate
side chains are eluted from Sepharose 6B at 0.5<K.sub.av<0.8
(peak II). Each experiment is done at least three times.
Degradation fragments corresponding to "peak II," as described by
Vlodaysky et al., is indicative of the activity of an albumin
fusion protein of the invention in cleaving heparan sulfate.
Example 58
Immobilization of Biomolecules
[1061] This example provides a method for the stabilization of an
albumin fusion protein of the invention in non-host cell lipid
bilayer constucts (see, e.g., Bieri et al., Nature Biotech
17:1105-1108 (1999), hereby incorporated by reference in its
entirety herein) which can be adapted for the study of fusion
proteins of the invention in the various functional assays
described above. Briefly, carbohydrate-specific chemistry for
biotinylation is used to confine a biotin tag to an albumin fusion
protein of the invention, thus allowing uniform orientation upon
immobilization. A 50 uM solution of an albumin fusion protein of
the invention in washed membranes is incubated with 20 mM NaIO4 and
1.5 mg/ml (4 mM) BACH or 2 mg/ml (7.5 mM) biotin-hydrazide for 1 hr
at room temperature (reaction volume, 150 ul). Then the sample is
dialyzed (Pierce Slidealizer Cassett, 10 kDa cutoff; Pierce
Chemical Co., Rockford Ill.) at 4 C first for 5 h, exchanging the
buffer after each hour, and finally for 12 h against 500 ml buffer
R (0.15 M NaCl, 1 mM MgCl2, 10 mM sodium phosphate, pH7). Just
before addition into a cuvette, the sample is diluted 1:5 in buffer
ROG50 (Buffer R supplemented with 50 mM octylglucoside).
Example 59
Assays for Metalloproteinase Activity
[1062] Metalloproteinases are peptide hydrolases which use metal
ions, such as Zn.sup.+, as the catalytic mechanism.
Metalloproteinase activity of an albumin fusion protein of the
present invention can be assayed according to methods known in the
art. The following exemplary methods are provided:
[1063] Proteolysis of Alpha-2-Macroglobulin
[1064] To confirm protease activity, a purified fusion protein of
the invention is mixed with the substrate alpha-2-macroglobulin
(0.2 unit/ml; Boehringer Mannheim, Germany) in 1.times. assay
buffer (50 mM HEPES, pH 7.5, 0.2 M NaCl, 10 mM CaCl.sub.2, 25 .mu.M
ZnCl.sub.2 and 0.05% Brij-35) and incubated at 37.degree. C. for
1-5 days. Trypsin is used as positive control. Negative controls
contain only alpha-2-macroglobulin in assay buffer. The samples are
collected and boiled in SDS-PAGE sample buffer containing 5%
2-mercaptoethanol for 5-min, then loaded onto 8% SDS-polyacrylamide
gel. After electrophoresis the proteins are visualized by silver
staining. Proteolysis is evident by the appearance of lower
molecular weight bands as compared to the negative control.
[1065] Inhibition of Alpha-2-Macroglobulin Proteolysis by
Inhibitors of Metalloproteinases
[1066] Known metalloproteinase inhibitors (metal chelators (EDTA,
EGTA, AND HgCl.sub.2), peptide metalloproteinase inhibitors (TIMP-1
and TIMP-2), and commercial small molecule MMP inhibitors) may also
be used to characterize the proteolytic activity of an albumin
fusion protein of the invention. Three synthetic MMP inhibitors
that may be used are: MMP inhibitor I, [IC.sub.50=1.0 .mu.M against
MMP-1 and MMP-8; IC.sub.50=30 .mu.M against MMP-9; IC.sub.50=150
.mu.M against MMP-3]; MMP-3 (stromelysin-1) inhibitor I
[IC.sub.50=5 .mu.M against MMP-3], and MMP-3 inhibitor II
[K.sub.i=130 nM against MMP-3]; inhibitors available through
Calbiochem, catalog #444250, 444218, and 444225, respectively).
Briefly, different concentrations of the small molecule MMP
inhibitors are mixed with a purified fusion protein of the
invention (50 .mu.g/ml) in 22.9 .mu.l of 1.times.HEPES buffer (50
mM HEPES, pH 7.5, 0.2 M NaCl, 10 mM CaCl.sub.2, 25 .mu.M ZnCl.sub.2
and 0.05% Brij-35) and incubated at room temperature (24.degree.
C.) for 2-hr, then 7.1 .mu.l of substrate alpha-2-macroglobulin
(0.2 unit/ml) is added and incubated at 37.degree. C. for 20-hr.
The reactions are stopped by adding 4x sample buffer and boiled
immediately for 5 minutes. After SDS-PAGE, the protein bands are
visualized by silver stain.
[1067] Synthetic Fluorogenic Peptide Substrates Cleavage Assay
[1068] The substrate specificity for fusion proteins of the
invention with demonstrated metalloproteinase activity may be
determined using techniques knonw in the art, such as using
synthetic fluorogenic peptide substrates (purchased from BACHEM
Bioscience Inc). Test substrates include, M-1985, M-2225, M-2105,
M-2110, and M-2255. The first four are MMP substrates and the last
one is a substrate of tumor necrosis factor-.alpha. (TNF-.alpha.)
convertins enzyme (TACE). These substrastes are preferably prepared
in 1:1 dimethyl sulfoxide (DMSO) and water. The stock solutions are
50-500 .mu.M. Fluorescent assays are performed by using a Perkin
Elmer LS 50B luminescence spectrometer equipped with a constant
temperature water bath. The excitation .lamda. is 328 nm and the
emission .lamda. is 393 nm. Briefly, the assay is carried out by
incubating 176 .mu.l 1.times.HEPES buffer (0.2 M NaCl, 10 mM
CaCl.sub.2, 0.05% Brij-35 and 50 mM HEPES, pH 7.5) with 4 .mu.l of
substrate solution (50 !AM) at 25.degree. C. for 15 minutes, and
then adding 20 .mu.l of a purified fusion protein of the invention
into the assay cuvett. The final concentration of substrate is 1
.mu.M. Initial hydrolysis rates are monitored for 30-min.
[1069] It will be clear that the invention may be practiced
otherwise than as particularly described in the foregoing
description and examples. Numerous modifications and variations of
the present invention are possible in light of the above teachings
and, therefore, are within the scope of the appended claims.
[1070] The entire disclosure of each document cited (including
patents, patent applications, patent publications, journal
articles, abstracts, laboratory manuals, books, or other
disclosures) as well as information available through Identifiers
specific to databases such as GenBank, GeneSeq, or the CAS
Registry, referred to in this application are herein incorporated
by reference in their entirety. The specification and sequence
listing of each of the following U.S. applications are herein
incorporated by reference in their entirety: Application Nos.
60/229,358 filed on Apr. 12, 2000; 60/199,384 filed on Apr. 25,2000
and 60/256,931 filed on Dec. 21, 2000.
Sequence CWU 1
1
36123DNAArtificial Sequenceprimer_bindprimer useful to clone human
growth hormone cDNA 1cccaagaatt cccttatcca ggc 23233DNAArtificial
Sequenceprimer_bindprimer useful to clone human growth hormone cDNA
2gggaagctta gaagccacag gatccctcca cag 33316DNAArtificial
Sequencemisc_structuresynthetic oligonucleotide used to join DNA
fragments with non-cohesive ends. 3gataaagatt cccaac
16417DNAArtificial Sequencemisc_structuresynthetic oligonucleotide
used to join DNA fragments with non-cohesive ends. 4aattgttggg
aatcttt 17517DNAArtificial Sequencemisc_structuresynthetic
oligonucleotide used to join DNA fragments with non-cohesive ends.
5ttaggcttat tcccaac 17618DNAArtificial
Sequencemisc_structuresynthetic oligonucleotide used to join DNA
fragments with non-cohesive ends. 6aattgttggg aataagcc
18724PRTArtificial SequenceSITE1)..(19)invertase leader sequence
7Met Leu Leu Gln Ala Phe Leu Phe Leu Leu Ala Gly Phe Ala Ala Lys 1
5 10 15Ile Ser Ala Asp Ala His Lys Ser 20821DNAArtificial
Sequencemisc_structuresynthetic oligonucleotide used to join DNA
fragments with non-cohesive ends. 8gagatgcaca cctgagtgag g
21927DNAArtificial Sequencemisc_structuresynthetic oligonucleotide
used to join DNA fragments with non-cohesive ends. 9gatcctgtgg
cttcgatgca cacaaga 271024DNAArtificial
Sequencemisc_structuresynthetic oligonucleotide used to join DNA
fragments with non-cohesive ends. 10ctcttgtgtg catcgaagcc acag
241130DNAArtificial Sequencemisc_structuresynthetic oligonucleotide
used to join DNA fragments with non-cohesive ends. 11tgtggaagag
cctcagaatt tattcccaac 301231DNAArtificial
Sequencemisc_structuresynthetic oligonucleotide used to join DNA
fragments with non-cohesive ends. 12aattgttggg aataaattct
gaggctcttc c 311347DNAArtificial Sequencemisc_structuresynthetic
oligonucleotide used to join DNA fragments with non-cohesive ends.
13ttaggcttag gtggcggtgg atccggcggt ggtggatctt tcccaac
471448DNAArtificial Sequencemisc_structuresynthetic oligonucleotide
used to join DNA fragments with non-cohesive ends. 14aattgttggg
aaagatccac caccgccgga tccaccgcca cctaagcc 481562DNAArtificial
Sequencemisc_structuresynthetic oligonucleotide used to join DNA
fragments with non-cohesive ends. 15ttaggcttag gcggtggtgg
atctggtggc ggcggatctg gtggcggtgg atccttccca 60ac
621663DNAArtificial Sequencemisc_structuresynthetic oligonucleotide
used to join DNA fragments with non-cohesive ends. 16aattgttggg
aaggatccac cgccaccaga tccgccgcca ccagatccac caccgcctaa 60gcc
63171782DNAHomo sapiensCDS(1)..(1755) 17gat gca cac aag agt gag gtt
gct cat cgg ttt aaa gat ttg gga gaa 48Asp Ala His Lys Ser Glu Val
Ala His Arg Phe Lys Asp Leu Gly Glu 1 5 10 15gaa aat ttc aaa gcc
ttg gtg ttg att gcc ttt gct cag tat ctt cag 96Glu Asn Phe Lys Ala
Leu Val Leu Ile Ala Phe Ala Gln Tyr Leu Gln 20 25 30cag tgt cca ttt
gaa gat cat gta aaa tta gtg aat gaa gta act gaa 144Gln Cys Pro Phe
Glu Asp His Val Lys Leu Val Asn Glu Val Thr Glu 35 40 45ttt gca aaa
aca tgt gtt gct gat gag tca gct gaa aat tgt gac aaa 192Phe Ala Lys
Thr Cys Val Ala Asp Glu Ser Ala Glu Asn Cys Asp Lys 50 55 60tca ctt
cat acc ctt ttt gga gac aaa tta tgc aca gtt gca act ctt 240Ser Leu
His Thr Leu Phe Gly Asp Lys Leu Cys Thr Val Ala Thr Leu 65 70 75
80cgt gaa acc tat ggt gaa atg gct gac tgc tgt gca aaa caa gaa cct
288Arg Glu Thr Tyr Gly Glu Met Ala Asp Cys Cys Ala Lys Gln Glu Pro
85 90 95gag aga aat gaa tgc ttc ttg caa cac aaa gat gac aac cca aac
ctc 336Glu Arg Asn Glu Cys Phe Leu Gln His Lys Asp Asp Asn Pro Asn
Leu 100 105 110ccc cga ttg gtg aga cca gag gtt gat gtg atg tgc act
gct ttt cat 384Pro Arg Leu Val Arg Pro Glu Val Asp Val Met Cys Thr
Ala Phe His 115 120 125gac aat gaa gag aca ttt ttg aaa aaa tac tta
tat gaa att gcc aga 432Asp Asn Glu Glu Thr Phe Leu Lys Lys Tyr Leu
Tyr Glu Ile Ala Arg 130 135 140aga cat cct tac ttt tat gcc ccg gaa
ctc ctt ttc ttt gct aaa agg 480Arg His Pro Tyr Phe Tyr Ala Pro Glu
Leu Leu Phe Phe Ala Lys Arg145 150 155 160tat aaa gct gct ttt aca
gaa tgt tgc caa gct gct gat aaa gct gcc 528Tyr Lys Ala Ala Phe Thr
Glu Cys Cys Gln Ala Ala Asp Lys Ala Ala 165 170 175tgc ctg ttg cca
aag ctc gat gaa ctt cgg gat gaa ggg aag gct tcg 576Cys Leu Leu Pro
Lys Leu Asp Glu Leu Arg Asp Glu Gly Lys Ala Ser 180 185 190tct gcc
aaa cag aga ctc aaa tgt gcc agt ctc caa aaa ttt gga gaa 624Ser Ala
Lys Gln Arg Leu Lys Cys Ala Ser Leu Gln Lys Phe Gly Glu 195 200
205aga gct ttc aaa gca tgg gca gtg gct cgc ctg agc cag aga ttt ccc
672Arg Ala Phe Lys Ala Trp Ala Val Ala Arg Leu Ser Gln Arg Phe Pro
210 215 220aaa gct gag ttt gca gaa gtt tcc aag tta gtg aca gat ctt
acc aaa 720Lys Ala Glu Phe Ala Glu Val Ser Lys Leu Val Thr Asp Leu
Thr Lys225 230 235 240gtc cac acg gaa tgc tgc cat gga gat ctg ctt
gaa tgt gct gat gac 768Val His Thr Glu Cys Cys His Gly Asp Leu Leu
Glu Cys Ala Asp Asp 245 250 255agg gcg gac ctt gcc aag tat atc tgt
gaa aat cag gat tcg atc tcc 816Arg Ala Asp Leu Ala Lys Tyr Ile Cys
Glu Asn Gln Asp Ser Ile Ser 260 265 270agt aaa ctg aag gaa tgc tgt
gaa aaa cct ctg ttg gaa aaa tcc cac 864Ser Lys Leu Lys Glu Cys Cys
Glu Lys Pro Leu Leu Glu Lys Ser His 275 280 285tgc att gcc gaa gtg
gaa aat gat gag atg cct gct gac ttg cct tca 912Cys Ile Ala Glu Val
Glu Asn Asp Glu Met Pro Ala Asp Leu Pro Ser 290 295 300tta gct gct
gat ttt gtt gaa agt aag gat gtt tgc aaa aac tat gct 960Leu Ala Ala
Asp Phe Val Glu Ser Lys Asp Val Cys Lys Asn Tyr Ala305 310 315
320gag gca aag gat gtc ttc ctg ggc atg ttt ttg tat gaa tat gca aga
1008Glu Ala Lys Asp Val Phe Leu Gly Met Phe Leu Tyr Glu Tyr Ala Arg
325 330 335agg cat cct gat tac tct gtc gtg ctg ctg ctg aga ctt gcc
aag aca 1056Arg His Pro Asp Tyr Ser Val Val Leu Leu Leu Arg Leu Ala
Lys Thr 340 345 350tat gaa acc act cta gag aag tgc tgt gcc gct gca
gat cct cat gaa 1104Tyr Glu Thr Thr Leu Glu Lys Cys Cys Ala Ala Ala
Asp Pro His Glu 355 360 365tgc tat gcc aaa gtg ttc gat gaa ttt aaa
cct ctt gtg gaa gag cct 1152Cys Tyr Ala Lys Val Phe Asp Glu Phe Lys
Pro Leu Val Glu Glu Pro 370 375 380cag aat tta atc aaa caa aac tgt
gag ctt ttt gag cag ctt gga gag 1200Gln Asn Leu Ile Lys Gln Asn Cys
Glu Leu Phe Glu Gln Leu Gly Glu385 390 395 400tac aaa ttc cag aat
gcg cta tta gtt cgt tac acc aag aaa gta ccc 1248Tyr Lys Phe Gln Asn
Ala Leu Leu Val Arg Tyr Thr Lys Lys Val Pro 405 410 415caa gtg tca
act cca act ctt gta gag gtc tca aga aac cta gga aaa 1296Gln Val Ser
Thr Pro Thr Leu Val Glu Val Ser Arg Asn Leu Gly Lys 420 425 430gtg
ggc agc aaa tgt tgt aaa cat cct gaa gca aaa aga atg ccc tgt 1344Val
Gly Ser Lys Cys Cys Lys His Pro Glu Ala Lys Arg Met Pro Cys 435 440
445gca gaa gac tat cta tcc gtg gtc ctg aac cag tta tgt gtg ttg cat
1392Ala Glu Asp Tyr Leu Ser Val Val Leu Asn Gln Leu Cys Val Leu His
450 455 460gag aaa acg cca gta agt gac aga gtc aca aaa tgc tgc aca
gag tcc 1440Glu Lys Thr Pro Val Ser Asp Arg Val Thr Lys Cys Cys Thr
Glu Ser465 470 475 480ttg gtg aac agg cga cca tgc ttt tca gct ctg
gaa gtc gat gaa aca 1488Leu Val Asn Arg Arg Pro Cys Phe Ser Ala Leu
Glu Val Asp Glu Thr 485 490 495tac gtt ccc aaa gag ttt aat gct gaa
aca ttc acc ttc cat gca gat 1536Tyr Val Pro Lys Glu Phe Asn Ala Glu
Thr Phe Thr Phe His Ala Asp 500 505 510ata tgc aca ctt tct gag aag
gag aga caa atc aag aaa caa act gca 1584Ile Cys Thr Leu Ser Glu Lys
Glu Arg Gln Ile Lys Lys Gln Thr Ala 515 520 525ctt gtt gag ctt gtg
aaa cac aag ccc aag gca aca aaa gag caa ctg 1632Leu Val Glu Leu Val
Lys His Lys Pro Lys Ala Thr Lys Glu Gln Leu 530 535 540aaa gct gtt
atg gat gat ttc gca gct ttt gta gag aag tgc tgc aag 1680Lys Ala Val
Met Asp Asp Phe Ala Ala Phe Val Glu Lys Cys Cys Lys545 550 555
560gct gac gat aag gag acc tgc ttt gcc gag gag ggt aaa aaa ctt gtt
1728Ala Asp Asp Lys Glu Thr Cys Phe Ala Glu Glu Gly Lys Lys Leu Val
565 570 575gct gca agt caa gct gcc tta ggc tta taacatctac
atttaaaagc atctcag 1782Ala Ala Ser Gln Ala Ala Leu Gly Leu 580
58518585PRTHomo Sapiens 18Asp Ala His Lys Ser Glu Val Ala His Arg
Phe Lys Asp Leu Gly Glu 1 5 10 15Glu Asn Phe Lys Ala Leu Val Leu
Ile Ala Phe Ala Gln Tyr Leu Gln 20 25 30Gln Cys Pro Phe Glu Asp His
Val Lys Leu Val Asn Glu Val Thr Glu 35 40 45Phe Ala Lys Thr Cys Val
Ala Asp Glu Ser Ala Glu Asn Cys Asp Lys 50 55 60Ser Leu His Thr Leu
Phe Gly Asp Lys Leu Cys Thr Val Ala Thr Leu 65 70 75 80Arg Glu Thr
Tyr Gly Glu Met Ala Asp Cys Cys Ala Lys Gln Glu Pro 85 90 95Glu Arg
Asn Glu Cys Phe Leu Gln His Lys Asp Asp Asn Pro Asn Leu 100 105
110Pro Arg Leu Val Arg Pro Glu Val Asp Val Met Cys Thr Ala Phe His
115 120 125Asp Asn Glu Glu Thr Phe Leu Lys Lys Tyr Leu Tyr Glu Ile
Ala Arg 130 135 140Arg His Pro Tyr Phe Tyr Ala Pro Glu Leu Leu Phe
Phe Ala Lys Arg145 150 155 160Tyr Lys Ala Ala Phe Thr Glu Cys Cys
Gln Ala Ala Asp Lys Ala Ala 165 170 175Cys Leu Leu Pro Lys Leu Asp
Glu Leu Arg Asp Glu Gly Lys Ala Ser 180 185 190Ser Ala Lys Gln Arg
Leu Lys Cys Ala Ser Leu Gln Lys Phe Gly Glu 195 200 205Arg Ala Phe
Lys Ala Trp Ala Val Ala Arg Leu Ser Gln Arg Phe Pro 210 215 220Lys
Ala Glu Phe Ala Glu Val Ser Lys Leu Val Thr Asp Leu Thr Lys225 230
235 240Val His Thr Glu Cys Cys His Gly Asp Leu Leu Glu Cys Ala Asp
Asp 245 250 255Arg Ala Asp Leu Ala Lys Tyr Ile Cys Glu Asn Gln Asp
Ser Ile Ser 260 265 270Ser Lys Leu Lys Glu Cys Cys Glu Lys Pro Leu
Leu Glu Lys Ser His 275 280 285Cys Ile Ala Glu Val Glu Asn Asp Glu
Met Pro Ala Asp Leu Pro Ser 290 295 300Leu Ala Ala Asp Phe Val Glu
Ser Lys Asp Val Cys Lys Asn Tyr Ala305 310 315 320Glu Ala Lys Asp
Val Phe Leu Gly Met Phe Leu Tyr Glu Tyr Ala Arg 325 330 335Arg His
Pro Asp Tyr Ser Val Val Leu Leu Leu Arg Leu Ala Lys Thr 340 345
350Tyr Glu Thr Thr Leu Glu Lys Cys Cys Ala Ala Ala Asp Pro His Glu
355 360 365Cys Tyr Ala Lys Val Phe Asp Glu Phe Lys Pro Leu Val Glu
Glu Pro 370 375 380Gln Asn Leu Ile Lys Gln Asn Cys Glu Leu Phe Glu
Gln Leu Gly Glu385 390 395 400Tyr Lys Phe Gln Asn Ala Leu Leu Val
Arg Tyr Thr Lys Lys Val Pro 405 410 415Gln Val Ser Thr Pro Thr Leu
Val Glu Val Ser Arg Asn Leu Gly Lys 420 425 430Val Gly Ser Lys Cys
Cys Lys His Pro Glu Ala Lys Arg Met Pro Cys 435 440 445Ala Glu Asp
Tyr Leu Ser Val Val Leu Asn Gln Leu Cys Val Leu His 450 455 460Glu
Lys Thr Pro Val Ser Asp Arg Val Thr Lys Cys Cys Thr Glu Ser465 470
475 480Leu Val Asn Arg Arg Pro Cys Phe Ser Ala Leu Glu Val Asp Glu
Thr 485 490 495Tyr Val Pro Lys Glu Phe Asn Ala Glu Thr Phe Thr Phe
His Ala Asp 500 505 510Ile Cys Thr Leu Ser Glu Lys Glu Arg Gln Ile
Lys Lys Gln Thr Ala 515 520 525Leu Val Glu Leu Val Lys His Lys Pro
Lys Ala Thr Lys Glu Gln Leu 530 535 540Lys Ala Val Met Asp Asp Phe
Ala Ala Phe Val Glu Lys Cys Cys Lys545 550 555 560Ala Asp Asp Lys
Glu Thr Cys Phe Ala Glu Glu Gly Lys Lys Leu Val 565 570 575Ala Ala
Ser Gln Ala Ala Leu Gly Leu 580 5851957DNAArtificial
Sequenceprimer_bindprimer used to generate XhoI and ClaI site in
pPPC0006 19gcctcgagaa aagagatgca cacaagagtg aggttgctca tcgatttaaa
gatttgg 572058DNAArtificial Sequenceprimer_bindprimer used in
generation XhoI and ClaI site in pPPC0006 20aatcgatgag caacctcact
cttgtgtgca tctcttttct cgaggctcct ggaataag 582124DNAArtificial
Sequenceprimer_bindprimer used in generation XhoI and ClaI site in
pPPC0006 21tacaaactta agagtccaat tagc 242229DNAArtificial
Sequenceprimer_bindprimer used in generation XhoI and ClaI site in
pPPC0006 22cacttctcta gagtggtttc atatgtctt 292360DNAArtificial
SequenceMisc_StructureSynthetic oligonucleotide used to alter
restriction sites in pPPC0007 23aagctgcctt aggcttataa taaggcgcgc
cggccggccg tttaaactaa gcttaattct 602460DNAArtificial
SequenceMisc_StructureSynthetic oligonucleotide used to alter
restriction sites in pPPC0007 24agaattaagc ttagtttaaa cggccggccg
gcgcgcctta ttataagcct aaggcagctt 602532DNAArtificial
Sequenceprimer_bindforward primer useful for generation of albumin
fusion protein in which the albumin moiety is N-terminal of the
Therapeutic Protein 25aagctgcctt aggcttannn nnnnnnnnnn nn
322651DNAArtificial Sequenceprimer_bindreverse primer useful for
generation of albumin fusion protein in which the albumin moiety is
N-terminal of the Therapeutic Protein 26gcgcgcgttt aaacggccgg
ccggcgcgcc ttattannnn nnnnnnnnnn n 512733DNAArtificial
Sequenceforward primer useful for generation of albumin fusion
protein in which the albumin moiety is c-terminal of the
Therapeutic Protein 27aggagcgtcg acaaaagann nnnnnnnnnn nnn
332852DNAArtificial Sequenceprimer_bindreverse primer useful for
generation of albumin fusion protein in which the albumin moiety is
c-terminal of the Therapeutic Protein 28ctttaaatcg atgagcaacc
tcactcttgt gtgcatcnnn nnnnnnnnnn nn 522924PRTArtificial
Sequencesignalsignal peptide of natural human serum albumin protein
29Met Lys Trp Val Ser Phe Ile Ser Leu Leu Phe Leu Phe Ser Ser Ala 1
5 10 15Tyr Ser Arg Ser Leu Asp Lys Arg 2030114DNAArtificial
Sequenceprimer_bindforward primer useful for generation of PC4HSA
albumin fusion VECTOR 30tcagggatcc aagcttccgc caccatgaag tgggtaacct
ttatttccct tctttttctc 60tttagctcgg cttactcgag gggtgtgttt cgtcgagatg
cacacaagag tgag 1143143DNAArtificial Sequenceprimer_bindreverse
primer useful for generation of PC4HSA albumin fusion VECTOR
31gcagcggtac cgaattcggc gcgccttata agcctaaggc agc
433246DNAArtificial Sequenceprimer_bindforward primer useful for
inserting Therapeutic protein into pC4HSA vector 32ccgccgctcg
aggggtgtgt ttcgtcgann nnnnnnnnnn nnnnnn 463355DNAArtificial
Sequenceprimer_bindreverse primer useful for inserting Therapeutic
protein into pC4HSA vector 33agtcccatcg atgagcaacc tcactcttgt
gtgcatcnnn nnnnnnnnnn nnnnn
553417PRTArtificial SequencesignalStanniocalcin signal peptide
34Met Leu Gln Asn Ser Ala Val Leu Leu Leu Leu Val Ile Ser Ala Ser 1
5 10 15Ala3522PRTArtificial SequencesignalSynthetic signal peptide
35Met Pro Thr Trp Ala Trp Trp Leu Phe Leu Val Leu Leu Leu Ala Leu 1
5 10 15Trp Ala Pro Ala Arg Gly 2036402DNAHomo sapiens 36gctccaactt
cttcttctac taagaagact caattgcaat tggaacactt gttgttggac 60ttgcaaatga
tcttaaacgg tataaacaac tataaaaacc caaagttgac tagaatgttg
120actttcaagt tctacatgcc aaagaaagct actgaattga agcacttgca
atgtttggaa 180gaagaattga agccattgga agaagttttg aacttggctc
aatctaagaa cttccacttg 240agaccaagag atttgatttc taacattaac
gttattgttt tggaattgaa gggttctgaa 300actactttta tgtgcgagta
cgcagacgaa actgctacta tcgttgagtt cttaaatagg 360tggatcactt
tctgccaatc tattatttct actttgacat aa 402
* * * * *
References