U.S. patent application number 17/069136 was filed with the patent office on 2021-01-28 for anti-wt1/hla-specific antibodies.
The applicant listed for this patent is Immatics Biotechnologies GmbH, Morphosys AG. Invention is credited to Klaus Felix HARTLEPP, Alexandra KRAUS, Andrea MAHR, Dominik MAURER, Claudia WAGNER, Toni WEINSCHENK.
Application Number | 20210024635 17/069136 |
Document ID | / |
Family ID | 1000005139244 |
Filed Date | 2021-01-28 |
United States Patent
Application |
20210024635 |
Kind Code |
A1 |
MAHR; Andrea ; et
al. |
January 28, 2021 |
ANTI-WT1/HLA-SPECIFIC ANTIBODIES
Abstract
The present invention relates to antibodies or fragments thereof
binding to human WT1/HLA. In particular, the present invention
relates to antibodies or fragments thereof that have combined
improved and/or beneficial properties, and are therefore suited for
clinical development.
Inventors: |
MAHR; Andrea; (Tuebingen,
DE) ; WEINSCHENK; Toni; (Aichwald, DE) ;
MAURER; Dominik; (Moessingen, DE) ; WAGNER;
Claudia; (Tuebingen, DE) ; HARTLEPP; Klaus Felix;
(Muenchen, DE) ; KRAUS; Alexandra; (Muenchen,
DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Immatics Biotechnologies GmbH
Morphosys AG |
Tuebingen
Planegg |
|
DE
DE |
|
|
Family ID: |
1000005139244 |
Appl. No.: |
17/069136 |
Filed: |
October 13, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
15288145 |
Oct 7, 2016 |
10836829 |
|
|
17069136 |
|
|
|
|
62239438 |
Oct 9, 2015 |
|
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
C07K 16/18 20130101;
G01N 33/6854 20130101; C07K 2317/565 20130101; C07K 2317/732
20130101; C07K 2317/34 20130101; C07K 2317/55 20130101; G01N 33/53
20130101; C07K 2317/33 20130101; C07K 2317/21 20130101; G01N
2500/04 20130101; C07K 14/4748 20130101; C07K 16/2833 20130101;
A61K 2039/505 20130101; C07K 2317/32 20130101 |
International
Class: |
C07K 16/28 20060101
C07K016/28; C07K 16/18 20060101 C07K016/18; G01N 33/53 20060101
G01N033/53; C07K 14/47 20060101 C07K014/47; G01N 33/68 20060101
G01N033/68 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 9, 2015 |
GB |
1517913.8 |
Oct 14, 2015 |
EP |
15189753.5 |
Claims
1. An isolated antibody comprising (a) a heavy chain comprising an
HCDR1 region consisting of SEQ ID NO: 17, an HCDR2 region
consisting of SEQ ID NO: 18, an HCDR3 region consisting of SEQ ID
NO: 19, and a light chain comprising a LCDR1 region consisting of
SEQ ID NO: 20, a LCDR2 region consisting of SEQ ID NO: 21, and a
LCDR3 region consisting of SEQ ID NO: 22, or (b) a heavy chain
comprising an HCDR1 region consisting of SEQ ID NO: 27, an HCDR2
region consisting of SEQ ID NO: 28, an HCDR3 region consisting of
SEQ ID NO: 29, and a light chain comprising a LCDR1 region
consisting of SEQ ID NO: 30, a LCDR2 region consisting of SEQ ID
NO: 31, and a LCDR3 region consisting of SEQ ID NO: 32, or (c) a
heavy chain comprising an HCDR1 region consisting of SEQ ID NO: 37,
an HCDR2 region consisting of SEQ ID NO: 38, an HCDR3 region
consisting of SEQ ID NO: 39, and a light chain comprising a LCDR1
region consisting of SEQ ID NO: 40, a LCDR2 region consisting of
SEQ ID NO: 41, and a LCDR3 region consisting of SEQ ID NO: 42, or
(d) a heavy chain comprising an HCDR1 region consisting of SEQ ID
NO: 47, an HCDR2 region consisting of SEQ ID NO: 48, an HCDR3
region consisting of SEQ ID NO: 49, and a light chain comprising a
LCDR1 region consisting of SEQ ID NO: 50, a LCDR2 region consisting
of SEQ ID NO: 51, and a LCDR3 region consisting of SEQ ID NO: 52,
or (e) a heavy chain comprising an HCDR1 region consisting of SEQ
ID NO: 57, an HCDR2 region consisting of SEQ ID NO: 58, an HCDR3
region consisting of SEQ ID NO: 59, and a light chain comprising a
LCDR1 region consisting of SEQ ID NO: 60, a LCDR2 region consisting
of SEQ ID NO: 61, and a LCDR3 region consisting of SEQ ID NO: 62,
wherein said antibody specifically binds to a complex of
HLA-A0201/RMFPNAPYL (SEQ ID NO: 1).
2. The isolated antibody of claim 1, wherein (a) the heavy chain
comprises a heavy chain variable region (VH) comprising at least
95% sequence identity to SEQ ID NO: 15, and the light chain
comprises a light chain variable region (VL) comprising at least
95% sequence identity to SEQ ID NO: 16, or (b) the heavy chain
comprises a heavy chain variable region (VH) comprising at least
95% sequence identity to SEQ ID NO: 25, and the light chain
comprises a light chain variable region (VL) comprising at least
95% sequence identity to SEQ ID NO: 26, or (c) the heavy chain
comprises a heavy chain variable region (VH) comprising at least
95% sequence identity to SEQ ID NO: 35, and the light chain
comprises a light chain variable region (VL) comprising at least
95% sequence identity to SEQ ID NO: 36, or (d) the heavy chain
comprises a heavy chain variable region (VH) comprising at least
95% sequence identity to SEQ ID NO: 45, and the light chain
comprises a light chain variable region (VL) comprising at least
95% sequence identity to SEQ ID NO: 46, or (e) the heavy chain
comprises a heavy chain variable region (VH) comprising at least
95% sequence identity to SEQ ID NO: 55, and the light chain
comprises a light chain variable region (VL) comprising at least
95% sequence identity to SEQ ID NO: 56.
3. The isolated antibody of claim 1, wherein (a) the heavy chain
comprises a heavy chain variable region (VH) comprising SEQ ID NO:
15, and the light chain comprises a light chain variable region
(VL) comprising SEQ ID NO: 16, or (b) the heavy chain comprises a
heavy chain variable region (VH) comprising SEQ ID NO: 25, and the
light chain comprises a light chain variable region (VL) comprising
SEQ ID NO: 26, or (c) the heavy chain comprises a heavy chain
variable region (VH) comprising SEQ ID NO: 35, and the light chain
comprises a light chain variable region (VL) SEQ ID NO: 36, or (d)
the heavy chain comprises a heavy chain variable region (VH)
comprising SEQ ID NO: 45, and the light chain comprises a light
chain variable region (VL) comprising SEQ ID NO: 46, or (e) the
heavy chain comprises a heavy chain variable region (VH) comprising
SEQ ID NO: 55, and the light chain comprises a light chain variable
region (VL) comprising SEQ ID NO: 56.
4. The antibody of claim 1, wherein the antibody is in an Fab
format.
5. The antibody of claim 4, wherein the antibody has an EC50 of
less than 10 nM.
6. The antibody of claim 1, wherein the antibody is in an
immunoglobulin format.
7. The antibody of claim 4, wherein the antibody has an EC50 of
less than 10 nM.
8. The antibody of claim 1, wherein the antibody binds to the
complex of HLA-A0201/RMFPNAPYL (SEQ ID NO: 1) with a dissociation
rate of less than 0.5 nM.
9. The antibody of claim 1, wherein the antibody is humanized.
10. The antibody of claim 1, wherein said antibody binds to a
complex of a peptide consisting of RMFPNAPYL (SEQ ID NO: 1) with
HLA-A0201 with an EC50 that is at least 10 times lower than the
EC50 for a complex of a peptide consisting of RMFPGEVAL (SEQ ID NO:
64) with HLA-A0201.
11. The antibody of claim 1, wherein said antibody does not bind a
complex of a peptide consisting of RMFPGEVAL (SEQ ID NO: 64) with
HLA-A0201.
12. The antibody of claim 1, wherein said antibody has an EC50 of
less than 10 nM in a Fab format and in an immunoglobulin
format.
13. The antibody of claim 1, further comprising a cytotoxic moiety
linked thereto.
14. A pharmaceutical composition comprising the antibody according
to claim 1, and a pharmaceutically acceptable carrier and/or
excipient.
15. An isolated antibody or an antigen-binding fragment thereof
which specifically binds to a complex of HLA-A0201/RMFPNAPYL (SEQ
ID NO: 1), wherein said antibody or antigen-binding fragment
thereof comprises: (a) a heavy chain variable region (VH)
comprising CDR regions HCDR1, HCDR2 and HCDR3 of SEQ ID NO: 15, and
a light chain variable region (VL) comprising CDR regions LCDR1,
LCDR2, and LCDR3 of SEQ ID NO: 16, or (b) a heavy chain variable
region (VH) comprising CDR regions HCDR1, HCDR2 and HCDR3 of SEQ ID
NO: 25, and a light chain variable region (VL) comprising CDR
regions LCDR1, LCDR2, and LCDR3 of SEQ ID NO: 26, or (c) a heavy
chain variable region (VH) comprising CDR regions HCDR1, HCDR2 and
HCDR3 of SEQ ID NO: 35, and a light chain variable region (VL)
comprising CDR regions LCDR1, LCDR2, and LCDR3 of SEQ ID NO: 36, or
(d) a heavy chain variable region (VH) comprising CDR regions
HCDR1, HCDR2 and HCDR3 of SEQ ID NO: 45, and a light chain variable
region (VL) comprising CDR regions LCDR1, LCDR2, and LCDR3 of SEQ
ID NO: 46, or (e) a heavy chain variable region (VH) comprising CDR
regions HCDR1, HCDR2 and HCDR3 of SEQ ID NO: 55, and a light chain
variable region (VL) comprising CDR regions LCDR1, LCDR2, and LCDR3
of SEQ ID NO: 56.
16. The isolated antibody or an antigen-binding fragment thereof of
claim 15, wherein (a) the CDR regions HCDR1, HCDR2 and HCDR3 of SEQ
ID NO: 15 comprise the amino acid sequences of SEQ ID NO: 17, 18,
and 19, respectively, and the CDR regions LCDR1, LCDR2, and LCDR3
of SEQ ID NO: 16 comprise the amino acid sequences of SEQ ID NO:
20, 21, and 22, respectively, or (b) the CDR regions HCDR1, HCDR2
and HCDR3 of SEQ ID NO: 25 comprise the amino acid sequences of SEQ
ID NO: 27, 28, and 29, respectively, and the CDR regions LCDR1,
LCDR2, and LCDR3 of SEQ ID NO: 26 comprise the amino acid sequences
of SEQ ID NO: 30, 31, and 32, respectively, or (c) the CDR regions
HCDR1, HCDR2 and HCDR3 of SEQ ID NO: 35 comprise the amino acid
sequences of SEQ ID NO: 37, 38, and 39, respectively, and the CDR
regions LCDR1, LCDR2, and LCDR3 of SEQ ID NO: 36 comprise the amino
acid sequences of SEQ ID NO: 40, 41, and 42, respectively, or (d)
the CDR regions HCDR1, HCDR2 and HCDR3 of SEQ ID NO: 45 comprise
the amino acid sequences of SEQ ID NO: 47, 48, and 49,
respectively, and the CDR regions LCDR1, LCDR2, and LCDR3 of SEQ ID
NO: 46 comprise the amino acid sequences of SEQ ID NO: 50, 51, and
52, respectively, or (e) the CDR regions HCDR1, HCDR2 and HCDR3 of
SEQ ID NO: 55 comprise the amino acid sequences of SEQ ID NO: 57,
58, and 59, respectively, and the CDR regions LCDR1, LCDR2, and
LCDR3 of SEQ ID NO: 56 comprise the amino acid sequences of SEQ ID
NO: 60, 61, and 62, respectively.
17. The isolated antibody or an antigen-binding fragment thereof of
claim 15, wherein (a) the CDR regions HCDR1, HCDR2 and HCDR3 of SEQ
ID NO: 15 consist of the amino acid sequences of SEQ ID NO: 17, 18,
and 19, respectively, and the CDR regions LCDR1, LCDR2, and LCDR3
of SEQ ID NO: 16 consist of the amino acid sequences of SEQ ID NO:
20, 21, and 22, respectively, or (b) the CDR regions HCDR1, HCDR2
and HCDR3 of SEQ ID NO: 25 consist of the amino acid sequences of
SEQ ID NO: 27, 28, and 29, respectively, and the CDR regions LCDR1,
LCDR2, and LCDR3 of SEQ ID NO: 26 consist of the amino acid
sequences of SEQ ID NO: 30, 31, and 32, respectively, or (c) the
CDR regions HCDR1, HCDR2 and HCDR3 of SEQ ID NO: 35 consist of the
amino acid sequences of SEQ ID NO: 37, 38, and 39, respectively,
and the CDR regions LCDR1, LCDR2, and LCDR3 of SEQ ID NO: 36
consist of the amino acid sequences of SEQ ID NO: 40, 41, and 42,
respectively, or (d) the CDR regions HCDR1, HCDR2 and HCDR3 of SEQ
ID NO: 45 consist of the amino acid sequences of SEQ ID NO: 47, 48,
and 49, respectively, and the CDR regions LCDR1, LCDR2, and LCDR3
of SEQ ID NO: 46 consist of the amino acid sequences of SEQ ID NO:
50, 51, and 52, respectively, or (e) the CDR regions HCDR1, HCDR2
and HCDR3 of SEQ ID NO: 55 consist of the amino acid sequences of
SEQ ID NO: 57, 58, and 59, respectively, and the CDR regions LCDR1,
LCDR2, and LCDR3 of SEQ ID NO: 56 consist of the amino acid
sequences of SEQ ID NO: 60, 61, and 62, respectively.
18. The isolated antibody or an antigen-binding fragment thereof of
claim 15, wherein the antibody or an antigen-binding fragment
thereof is in an Fab format.
19. The isolated antibody or an antigen-binding fragment thereof of
claim 15, wherein the antibody or an antigen-binding fragment
thereof is in an immunoglobulin format.
20. A method of treating a patent who has cancer that presents
RMFPNAPYL (SEQ ID NO: 1) in a complex with HLA-A0201, comprising
administering to the patient the antibody of claim 1, wherein the
cancer is selected from the group consisting of chronic myelocytic
leukemia, multiple myeloma, acute lymphoblastic leukemia, acute
myeloid/myelogenous leukemia, myelodysplastic syndrome,
mesothelioma, ovarian cancer, gastrointestinal cancers, breast
cancer, prostate cancer, and glioblastoma.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a Continuation of U.S. application Ser.
No. 15/288,145, filed 7 Oct. 2016, which claims the benefit of U.S.
Provisional Application Ser. No. 62/239,438, filed 9 Oct. 2015,
Great Britain Application No. 1517913.8, filed 9 Oct. 2015, and
European Application No. 15189753.5, filed 14 Oct. 2015, the
content of each of these applications is herein incorporated by
reference in their entirety.
[0002] This application also is related to PCT/EP2016/073587, filed
4 Oct. 2016, the content of which is incorporated herein by
reference in its entirety.
REFERENCE TO SEQUENCE LISTING SUBMITTED AS A COMPLIANT ASCII TEXT
FILE (.txt)
[0003] Pursuant to the EFS-Web legal framework and 37 CFR
.sctn..sctn. 1.821-825 (see MPEP .sctn. 2442.03(a)), a Sequence
Listing in the form of an ASCII-compliant text file (entitled
"Sequence_Listing_2912919-056002_ST25.txt" created on 13 Oct. 2020,
and 30,005 bytes in size) is submitted concurrently with the
instant application, and the entire contents of the Sequence
Listing are incorporated herein by reference.
FIELD
[0004] The present application relates to antibodies or antibody
fragments which specifically bind to the WT1/HLA complex. The
invention also relates to nucleic acids, vectors and host cells
capable of expressing said antibodies or fragments thereof,
pharmaceutical compositions comprising said antibodies or fragments
thereof and uses of said antibodies or fragments thereof for
treatment of specific diseases.
BACKGROUND OF THE INVENTION
[0005] The Wilms tumor 1 (WT1) oncoprotein is an intracellular,
oncogenic transcription factor that is overexpressed in a wide
range of leukemias and solid cancers. WT1 is a nuclear protein and
therefore not accessible for conventional antibody therapy. A
WT1-derived peptide named RMF (amino acid sequence RMFPNAPYL (SEQ
ID No. #1)) is processed and presented by HLA-A0201 molecules. This
peptide induces cytotoxic CD8 T cells capable of killing WT1+ tumor
cells in vitro and in human T cell-based and vaccine trials (Cancer
Immunol Immunother. 2010; 59:1467-1479). This provides a rationale
to target the HLA-restricted peptide with antibodies.
[0006] Antibodies against the WT1 RMF peptide/HLA-A0201 complex
(RMF/HLA) have been described. Dao et al., Sci Transl Med. 2013
Mar. 13; 5(176): 176ra33; WO 2012/135854). Derivatives of these
antibodies in bispecific format (WO 2015/070061) and with enhanced
Fc-activity (WO 2015/070078) were also generated.
[0007] The present invention provides novel antibodies and antibody
fragments that are superior to the antibodies known in the prior
art. The antibodies and antibody fragments disclosed herein
specifically bind to the WT1 RMF peptide/HLA-A0201 complex
(RMF/HLA).
[0008] These antibodies and antibody fragments are particularly
well suited for preclinical and clinical development and represent
promising drug candidates. The antibodies are also amenable for
further improvements, including those described herein.
SUMMARY OF THE INVENTION
[0009] The present application for the first time discloses
antibodies and fragments thereof that specifically bind to RMF
peptide/HLA-A0201 complex (RMF/HLA) and have the superior
properties as disclosed herein. The antibodies and fragments
thereof of the present disclosure do not bind to unspecific
peptides complexed with HLA-A0201. In particular, the antibodies
and fragments thereof of the present disclosure do not bind to the
PIGQ peptide (a peptide ubiquitously expressed on healthy human
tissue) when complexed with HLA-A0201. The antibodies or fragments
thereof of the present invention bind to cells expressing the
RMF/HLA complex. In particular, the antibodies of the present
invention bind to cancer cells expressing the RMF/HLA complex. The
antibodies and fragments thereof also show EC50 values and
affinities in a monovalent Fab format and in a bispecific
immunoglobulin format that have never been reported before. Thus,
the antibodies or fragments thereof of the present invention are
therefore improved in terms of effectiveness, and thus provide well
suited and promising compounds, e.g. for clinical development.
[0010] Antibodies with the properties as claimed were generated
utilizing a sophisticated screening and counter-screening method.
It is therefore possible to identify additional antibodies or
fragments thereof having essentially the same or the same
properties.
[0011] The present invention provides antibodies or fragments
thereof that specifically bind to the RMF/HLA complex present on
the surface cells. The present disclosure also provides antibodies
or fragments thereof that specifically bind to the RMF/HLA complex
but which do not bind to the PIGQ/HLA complex. The present
disclosure also provides antibodies or fragments thereof that bind
to the RMF/HLA complex with an EC50 which is at least 10 times
lower than the EC50 for the PIGQ/HLA complex.
[0012] The present invention also relates to a method for
identifying an antibody or fragment thereof according to the
present invention, comprising (a) mixing an antibody library
comprising a plurality of antibodies or fragments thereof with a
PIGQ/HLA complex under conditions allowing a specific binding of
antibodies or the fragments thereof to said complex, (b) removing
from the antibody library those antibodies or fragments thereof
that bind to said PIGQ/HLA complex, (c) mixing the depleted
antibody library of step (b) with an RMF/HLA complex under
conditions allowing a specific binding of antibodies or the
fragments thereof to said complex, and (d) identifying those
antibodies or fragments thereof that bind to the RMF/HLA
complex.
[0013] The present invention provides antibodies or fragments
thereof that bind to the RMF peptide/HLA-A0201 complex (RMF/HLA)
having the CDR regions according to the amino acids as listed in
Table 1. The present invention also provides specific antibodies or
fragments thereof having a variable heavy chain and a variable
light chain comprising the amino acid sequences according to Table
1. The present invention also provides specific antibodies or
fragments thereof having CDR regions comprising the amino acid
sequences according to Table 1. The present invention also provides
antibodies or fragments thereof comprising a heavy chain and a
light chain that is at least 60%, at least 70%, at least 80%, at
least 90% or at least 95% homologous (identical) to the ones of the
antibodies as shown in Table 1. The present invention also provides
antibodies or fragments thereof which comprising CDR regions that
are at least 60%, at least 70%, at least 80%, at least 90% or at
least 95% homologous to the CDR regions of the antibodies as shown
in Table 1.
[0014] The present invention also provides specific antibodies or
fragments thereof the binding of which competes with the specific
antibodies or fragments thereof as disclosed herein. The present
invention also provides specific antibodies or antibody fragments
which bind to the same epitope as the specific antibodies or
fragments thereof disclosed herein. The present invention also
provides specific antibodies or fragments thereof that compete with
the specific antibodies or fragments thereof disclosed herein and
specifically bind to the RMF/HLA complex when presented on the
surface of cells.
[0015] The present invention also provides the isolated antibodies
or fragments thereof of the present invention for use in medicine.
The present invention also provides the antibodies or fragments
thereof of the present invention for use in the treatment of
patients suffering from a WT1-positive disease, such as cancer.
Such WT1 positive diseases and cancers include chronic myelocytic
leukemia (CML), multiple myeloma (MM), acute lymphoblastic leukemia
(ALL), acute myeloid/myelogenous leukemia (AML), myelodysplastic
syndrome (MDS), mesothelioma, ovarian cancer, gastrointestinal
cancers, breast cancer, prostate cancer and glioblastoma. In some
embodiments, the antibody or fragment thereof is a conjugate having
a cytotoxic moiety linked thereto. In other embodiments, the
antibody or fragment thereof can carry certain additional
modifications, such as, for example, Fc modifications.
[0016] The present invention also provides pharmaceutical
compositions comprising the isolated antibodies or fragments
thereof of the present invention, and a pharmaceutically acceptable
carrier.
[0017] The present invention also provides nucleic acids encoding
for the antibodies or fragments thereof of the present
invention.
[0018] The present invention also provides vectors comprising
nucleic acids encoding the antibodies or fragments thereof of the
present invention.
[0019] The present invention also provides host cell comprising
vector or nucleic acids encoding the antibodies or fragments
thereof of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0020] The invention relates to antibodies or fragments thereof
that recognize, preferably specifically recognize, and thus bind
to, WT1 RMF peptide/HLA-A0201 complexes (RMF/HLA).
[0021] The term "WT1" refers to a protein known as Wilms tumor
protein. Certain synonyms of WT1 do exits, including AWT1, GUD,
NPHS4, WAGR, Wilms tumor protein, WIT-2 and WT33. Human WT1 has the
following amino acid sequence (UniProt P19544):
TABLE-US-00001 (SEQ ID NO: 2)
MGSDVRDLNALLPAVPSLGGGGGCALPVSGAAQWAPVLDFAPPGASAYGS
LGGPAPPPAPPPPPPPPPHSFIKQEPSWGGAEPHEEQCLSAFTVHFSGQF
TGTAGACRYGPFGPPPPSQASSGQARMFPNAPYLPSCLESQPAIRNQGYS
TVTFDGTPSYGHTPSHHAAQFPNHSFKHEDPMGQQGSLGEQQYSVPPPVY
GCHTPTDSCTGSQALLLRTPYSSDNLYQMTSQLECMTWNQMNLGATLKGV
AAGSSSSVKWTEGQSNHSTGYESDNHTTPILCGAQYRIHTHGVFRGIQDV
RRVPGVAPTLVRSASETSEKRPFMCAYPGCNKRYFKLSHLQMHSRKHTGE
KPYQCDFKDCERRFSRSDQLKRHQRRHTGVKPFQCKTCQRKFSRSDHLKT
HTRTHTGKTSEKPFSCRWPSCQKKFARSDELVRHHNMHQRNMTKLQLAL
[0022] Homologues of WT1 are also known from other species,
including mouse (UniProt P22561), wild boar (NCBI NP_001001264.1),
chimpanzee, cattle, red junglefowl, dog, sheep, Japanese rice fish,
rat (UniProt P49952) and zebrafish. In most preferred embodiments,
WT1 is human WT1. In other preferred embodiments, WT1 is the
protein according to SEQ ID NO: 2.
[0023] The terms "RMF" and "RMF peptide" refer to the WT1-derived
peptide having the amino acid sequence RMFPNAPYL (SEQ ID NO:
1).
[0024] The terms "HLAA0201", "HLA-A*02:01" and "HLA-A0201" refer to
a specific HLA serotype. HLA-A0201 is a heterodimeric protein,
comprising an alpha chain and a beta chain.
[0025] The terms "WT1/HLA complex", "WT1/HLA", "RMF/HLA complex"
and "RMF/HLA" are used interchangeably, and refer to a complex of
the RMF peptide with HLA-A0201. The antibodies and fragments
thereof of the present invention are specific for the WT1/HLA
complex.
[0026] The terms "RHAMM" and "RHAMM peptide" refer to the peptide
with the amino acid sequence ILSLELMKL (SEQ ID No. 63). The terms
"RHAMM/HLA complex" and "RHAMM/HLA" refer to a complex of said
RHAMM peptide with HLA-A0201.
[0027] The terms "PIGQ" and "PIGQ peptide" refer to the peptide
with the amino acid sequence RMFPGEVAL (SEQ ID No. 64). This
peptide occurs ubiquitously in healthy human tissue.
[0028] The terms "PIGQ/HLA complex" and "PIGQ/HLA" refer to a
complex of the PIGQ peptide with HLA-A0201.
[0029] The term "antibody" as used herein refers to a protein
comprising at least two heavy (H) chains and two light (L) chains
inter-connected by disulfide bonds which interacts (e.g., by
binding, steric hindrance, stabilizing spatial distribution) with
an antigen. Each heavy chain is comprised of a heavy chain variable
region (abbreviated herein as VH) and a heavy chain constant
region. The heavy chain constant region is comprised of three
domains, CH1, CH2 and CH3. Each light chain is comprised of a light
chain variable region (abbreviated herein as VL) and a light chain
constant region. The light chain constant region is comprised of
one domain, CL. The VH and VL regions can be further subdivided
into regions of hypervariability, termed complementarity
determining regions (CDR), interspersed with regions that are more
conserved, termed framework regions (FR). Each VH and VL is
composed of three CDRs and four FR's arranged from amino-terminus
to carboxy-terminus in the following order: FR1, CDR1, FR2, CDR2,
FR3, CDR3, and FR4. The variable regions of the heavy and light
chains contain a binding domain that interacts with an antigen. The
constant regions of the antibodies may mediate the binding of the
immunoglobulin to host tissues or factors, including various cells
of the immune system (e.g., effector cells) and the first component
(Clq) of the classical complement system. The term "antibody"
includes for example, monoclonal antibodies, human antibodies,
humanized antibodies, camelised antibodies and chimeric antibodies.
The antibodies can be of any isotype (e.g., IgG, IgE, IgM, IgD, IgA
and IgY), class (e.g., IgG1, IgG2, IgG3, IgG4, IgA1 and IgA2) or
subclass. Both the light and heavy chains are divided into regions
of structural and functional homology. The term "immunoglobulin
format" refers to a full length antibody as defined herein
above.
[0030] The phrase "antibody fragment" or "fragment thereof", as
used herein, refers to one or more portions of an antibody that
retain(s) the ability to specifically interact with (e.g., by
binding, steric hindrance, stabilizing spatial distribution) an
antigen. Examples of binding fragments include, but are not limited
to, a Fab fragment, a monovalent fragment consisting of the VL, VH,
CL and CH1 domains; a F(ab)2 fragment, a bivalent fragment
comprising two Fab fragments linked by a disulfide bridge at the
hinge region; an Fd fragment consisting of the VH and CH1 domains;
an Fv fragment consisting of the VL and VH domains of a single arm
of an antibody; a dAb fragment (Ward et al., (1989) Nature
341:544-546), which consists of a VH domain; and an isolated
complementarity determining region (CDR). Furthermore, although the
two domains of the Fv fragment, VL and VH, are coded for by
separate genes, they can be joined, using recombinant methods, by a
synthetic linker that enables them to be made as a single protein
chain in which the VL and VH regions pair to form monovalent
molecules (known as single chain Fv (scFv); see e.g., Bird et al.,
(1988) Science 242:423-426; and Huston et al., (1988) Proc. Natl.
Acad. Sci. 85:5879-5883). Such single chain antibodies are also
intended to be encompassed within the term "antibody fragment".
These antibody fragments are obtained using conventional techniques
known to those of skill in the art, and the fragments are screened
for utility in the same manner as are intact antibodies. Antibody
fragments can also be incorporated into single domain antibodies,
maxibodies, minibodies, intrabodies, diabodies, triabodies,
tetrabodies, v-NAR and bis-scFv (see, e.g., Hollinger and Hudson,
(2005) Nature Biotechnology 23:1126-1136). Antibody fragments can
be grafted into scaffolds based on polypeptides such as Fibronectin
type Ill (Fn3) (see U.S. Pat. No. 6,703,199, which describes
fibronectin polypeptide monobodies). Antibody fragments can be
incorporated into single chain molecules comprising a pair of
tandem Fv segments (VH-CH1-VH-CH1) which, together with
complementary light chain polypeptides, form a pair of
antigen-binding sites (Zapata et al., (1995) Protein Eng.
8:1057-1062; and U.S. Pat. No. 5,641,870). The term "Fab format"
refers to a Fab fragment of an antibody.
[0031] The term "antigen binding site" refers to the part of the
antibody or antibody fragment that comprises the area or part(s) of
it that specifically bind(s) to an antigen. An antigen binding site
may be provided by one or more antibody variable domains.
Preferably, an antigen binding site is comprised within the
associated VH and VL of an antibody or fragment thereof.
[0032] A "human antibody" or "human antibody fragment", as used
herein, includes antibodies and fragment thereof having variable
regions in which both the framework and CDR regions are derived
from sequences of human origin. Furthermore, if the antibody
contains a constant region, the constant region also is derived
from such human sequences, e.g., human germline sequences, or
mutated versions of human germline sequences or antibody containing
consensus framework sequences derived from human framework
sequences analysis, for example, as described in Knappik et al.,
(2000) J Mol Biol 296:57-86). The structures and locations of
immunoglobulin variable domains, e.g., CDRs, may be defined using
well known numbering schemes, e.g., the Kabat numbering scheme, the
Chothia numbering scheme, or a combination of Kabat and Chothia
(see, e.g., Sequences of Proteins of Immunological Interest, U.S.
Department of Health and Human Services (1991), eds. Kabat et al.;
Lazikani et al., (1997) J. Mol. Bio. 273:927-948); Kabat et al.,
(1991) Sequences of Proteins of Immunological Interest, 5th edit.,
NIH Publication no. 91-3242 U.S. Department of Health and Human
Services; Chothia et al., (1987) J. Mol. Biol. 196:901-917; Chothia
et al., (1989) Nature 342:877-883; and Al-Lazikani et al., (1997)
J. Mol. Biol. 273:927-948.
[0033] A "humanized antibody" or "humanized antibody fragment" as
defined herein is one that is (i) derived from a non-human source
(e.g., a transgenic mouse which bears a heterologous immune
system), which antibody is based on a human germline sequence or
(ii) CDR-grafted, wherein the CDRs of the variable domain are from
a non-human origin, while one or more frameworks of the variable
domain are of human origin and the constant domain (if any) is of
human origin.
[0034] The term "chimeric antibody" or "chimeric antibody fragment"
is defined herein as an antibody molecule which has constant
antibody regions derived from, or corresponding to, sequences found
in one species and variable antibody regions derived from another
species. Preferably, the constant antibody regions are derived
from, or corresponding to, sequences found in humans, e.g. in the
human germ line or somatic cells, and the variable antibody regions
(e.g. VH, VL, CDR or FR regions) are derived from sequences found
in a non-human animal, e.g. a mammal, such as a mouse, rat, rabbit
or hamster.
[0035] The term "isolated" refers to a compound, which can be e.g.
an antibody or antibody fragment, that is substantially free of
other antibodies or antibody fragments having different antigenic
specificities. Moreover, an isolated antibody or fragment thereof
may be substantially free of other cellular material and/or
chemicals. Thus, in some aspects, antibodies provided are isolated
antibodies which have been separated from antibodies with a
different specificity. An isolated antibody may be a monoclonal
antibody. An isolated antibody may be a recombinant monoclonal
antibody. An isolated antibody that specifically binds to an
epitope, isoform or variant of a target may, however, have
cross-reactivity to other related antigens, e.g., from other
species (e.g., species homologs).
[0036] The term "recombinant antibody", as used herein, includes
all antibodies that are prepared, expressed, created or segregated
by recombinant means, such as antibodies isolated from an animal
(e.g., a mouse) that is transgenic or transchromosomal for human
immunoglobulin genes or a hybridoma prepared therefrom, antibodies
isolated from a host cell transformed to express the antibody,
antibodies selected and isolated from a recombinant, combinatorial
human antibody library, and antibodies prepared, expressed, created
or isolated by any other means that involve splicing of all or a
portion of a human immunoglobulin gene, sequences to other DNA
sequences. Preferably, such recombinant antibodies have variable
regions in which the framework and CDR regions are derived from
human germline immunoglobulin sequences. In certain embodiments,
however, such recombinant human antibodies can be subjected to in
vitro mutagenesis (or, when an animal transgenic for human Ig
sequences is used, in vivo somatic mutagenesis) and thus the amino
acid sequences of the VH and VL regions of the recombinant
antibodies are sequences that, while derived from and related to
human germline VH and VL sequences, may not naturally exist within
the human antibody germline repertoire in vivo. A recombinant
antibody may be a monoclonal antibody. In an embodiment, the
antibodies and antibody fragment disclosed herein are isolated from
the Ylanthia.RTM. antibody library as disclosed in U.S. Ser. No.
13/321,564 or U.S. Ser. No. 13/299,367, which both are incorporated
herein by reference in their entireties.
[0037] The term "monoclonal antibody" as used herein refers to a
preparation of antibody molecules of single molecular composition.
A monoclonal antibody composition displays a unique binding site
having a unique binding specificity and affinity for particular
epitopes.
[0038] As used herein, an antibody "binds specifically to",
"specifically binds to", is "specific to/for" or "specifically
recognizes" an antigen, if such antibody or fragment thereof is
able to discriminate between such antigen and one or more reference
antigen(s), since binding specificity is not an absolute, but a
relative property. The reference antigen(s) may be one or more
closely related antigen(s), which are used as reference points,
e.g. a mutated of scrambled version of the WT1/HLA complex. In
particular, an antibody or antibody fragment that "specifically
binds to" the WTA/HLA complex does neither bind to the RHAMM/HLA
complex nor to the PIGQ/HLA complex.
[0039] In its most general form (and unless specifically defined
otherwise), a "specific binding" is referring to the ability of the
antibody or fragment thereof to discriminate between an antigen of
interest and an unrelated antigen, as determined, for example, in
accordance with one of the following methods. Such methods
comprise, but are not limited to Western blots, ELISA-, RIA-, ECL-,
IRMA-tests and peptide scans. For example, a standard ELISA assay
can be carried out. The scoring may be carried out by standard
color development (e.g. secondary antibody with horseradish
peroxidase and tetramethyl benzidine with hydrogen peroxide). The
reaction in certain wells is scored by the optical density, for
example, at 450 nm. Typical background (=negative reaction) may be
0.1 OD; typical positive reaction may be 1 OD. This means the
difference positive/negative can be more than 10-fold. Typically,
determination of binding specificity is performed by using not a
single reference antigen, but a set of about three to five
unrelated antigens, such as milk powder, BSA, transferrin or the
like. Additionally, "specific binding" may relate to the ability to
discriminate between different parts of its target antigen, e.g.
different domains or regions of the WT1/HLA complex, or between one
or more key amino acid residues or stretches of amino acid residues
of the WT1/HLA complex. Preferably, the antibodies or fragment
thereof disclosed herein specifically bind a WT1/HLA complex of a
mammal, in particular to the human WT1/HLA complex.
[0040] The term "avidity" is used to describe the combined strength
of multiple bond interactions between proteins. Avidity is distinct
from affinity which describes the strength of a single bond. As
such, avidity is the combined synergistic strength of bond
affinities (functional affinity) rather than the sum of bonds.
Whilst each single binding interaction of the two binding sites may
be readily broken (depending on the relative affinity), because
many binding interactions are present at the same time, transient
unbinding of a single site does not allow the molecule to diffuse
away, and binding of that site is likely to be reinstated. The
overall effect is a synergistic, strong binding of antigen to
antibody.
[0041] As used herein, the term "affinity" refers to the strength
of interaction between the polypeptide and its target at a single
site. Within each site, the binding region of the polypeptide
interacts through weak non-covalent forces with its target at
numerous sites; usually, the more interactions, the stronger the
affinity.
[0042] The term "K.sub.D", as used herein, refers to the
dissociation constant, which is obtained from the ratio of K.sub.d
to K.sub.a (i.e. K.sub.d/K.sub.a) and is expressed as a molar
concentration (M). K.sub.D values for antigen binding moieties like
e.g. monoclonal antibodies can be determined using methods well
established in the art. Methods for determining the K.sub.D of an
antigen binding moiety like e.g. a monoclonal antibody are SET
(soluble equilibrium titration) or surface plasmon resonance using
a biosensor system such as a Biacore.RTM. system or an Octet system
(ForteBio). In the present invention, an antibody specific for the
WT1/HLA complex typically has a dissociation rate constant
(K.sub.D) (k.sub.off/k.sub.on) of less than 5.times.10.sup.-2M,
less than 10.sup.-2M, less than 5.times.10.sup.-3M, less than
10.sup.-3M, less than 5.times.10.sup.-4M, less than 10.sup.-4M,
less than 5.times.10.sup.-5M, less than 10.sup.-5M, less than
5.times.10.sup.-6M, less than 10.sup.-6M, less than
5.times.10.sup.-7M, less than 10.sup.-7M, less than
5.times.10.sup.-8M, less than 10.sup.-8M, less than
5.times.10.sup.-9M, less than 10.sup.-9M, less than
5.times.10.sup.-10M, less than 10.sup.-10M, less than
5.times.10.sup.-11M, less than 10.sup.-11M, less than
5.times.10.sup.-12M, less than 10.sup.-12M, less than
5.times.10.sup.-13M, less than 10.sup.-13M, less than
5.times.10.sup.-14M, less than 10.sup.-14M, less than
5.times.10.sup.-15M, or less than 10.sup.-15M or lower.
[0043] "Cross-competing" or "cross-competes" means the ability of
an antibody, antibody fragment or other antigen-binding moiety to
interfere with the binding of other antibodies, antibody fragments
or antigen-binding moieties to a specific antigen in a standard
competitive binding assay. The ability or extent to which an
antibody, antibody fragment or other antigen-binding moieties is
able to interfere with the binding of another antibody, antibody
fragment or antigen-binding moieties to a specific antigen, and,
therefore whether it can be said to cross-compete according to the
invention, can be determined using standard competition binding
assays. One suitable assay involves the use of the Biacore
technology (e.g. by using the BIAcore 3000 instrument (Biacore,
Uppsala, Sweden)), which can measure the extent of interactions
using surface plasmon resonance technology. Another assay for
measuring cross-competing uses an ELISA-based approach. A high
throughput process for "epitope binning" antibodies based upon
their cross-competition is described in WO 2003/48731.
Cross-competition is present if the antibody or antibody fragment
under investigation reduces the binding of one of the antibodies as
described in Table 1 to the WT1/HLA complex by 60% or more,
specifically by 70% or more and more specifically by 80% or more
and if one of the antibodies as described in Table 1 reduces the
binding of said antibody or antibody fragment to the WT1/HLA
complex by 60% or more, specifically by 70% or more and more
specifically by 80% or more.
[0044] The term "epitope" includes any proteinaceous region which
is specifically recognized by an antibody or fragment thereof or a
T-cell receptor or otherwise interacts with a molecule. Generally
epitopes are of chemically active surface groupings of molecules
such as amino acids or carbohydrate or sugar side chains and
generally may have specific three-dimensional structural
characteristics, as well as specific charge characteristics. As
will be appreciated by one of skill in the art, practically
anything to which an antibody can specifically bind could be an
epitope. An epitope can comprise those residues to which the
antibody binds and may be "linear" or "conformational." The term
"linear epitope" refers to an epitope wherein all of the points of
interaction between the protein and the interacting molecule (such
as an antibody) occur linearly along the primary amino acid
sequence of the protein (continuous). The term "conformational
epitope" refers to an epitope in which discontinuous amino acids
that come together in three dimensional conformations. In a
conformational epitope, the points of interaction occur across
amino acid residues on the protein that are separated from one
another.
[0045] "Binds the same epitope as" means the ability of an
antibody, antibody fragment or other antigen-binding moiety to bind
to a specific antigen and having the same epitope as the
exemplified antibody. The epitopes of the exemplified antibody and
other antibodies can be determined using epitope mapping
techniques. Epitope mapping techniques are well known in the art.
For example, conformational epitopes are readily identified by
determining spatial conformation of amino acids such as by, e.g.,
hydrogen/deuterium exchange, x-ray crystallography and
two-dimensional nuclear magnetic resonance.
[0046] Compositions of the invention may be used for therapeutic or
prophylactic applications. The invention, therefore, includes a
pharmaceutical composition containing an inventive antibody (or
functional antibody fragment) and a pharmaceutically acceptable
carrier or excipient therefore. In a related aspect, the invention
provides a method for treating an inflammatory disorder. Such
method contains the steps of administering to a subject in need
thereof an effective amount of the pharmaceutical composition
containing an antibody according to the present invention as
described or contemplated herein.
[0047] The present invention provides therapeutic methods
comprising the administration of a therapeutically effective amount
of the WT1/HLA complex antibody as disclosed to a subject in need
of such treatment. A "therapeutically effective amount" or
"effective amount", as used herein, refers to the amount of the
WT1/HLA complex antibody necessary to elicit the desired biological
response. In accordance with the present invention, the
therapeutically effective amount is the amount of the WT1/HLA
complex antibody necessary to treat and/or prevent a specific
disease.
[0048] "Subject" or "species", as used in this context refers to
any mammal, including rodents, such as mouse or rat, and primates,
such as cynomolgus monkey (Macaca fascicularis), rhesus monkey
(Macaca mulatta) or humans (Homo sapiens). Preferably, the subject
is a primate, most preferably a human.
[0049] In one embodiment, the present invention relates to an
antibody or fragment thereof that specifically binds to the RMF/HLA
complex.
[0050] In another embodiment, the present invention relates to an
antibody or fragment thereof that specifically binds to the RMF/HLA
complex as presented and/or present on the surface of cells.
[0051] In another embodiment, the present invention relates to an
antibody or fragment thereof which specifically binds to a cell
expressing the RMF/HLA complex.
[0052] In another embodiment, the present invention relates to an
antibody or fragment thereof which specifically binds to a cancer
cell expressing the RMF/HLA complex, and preferably to a cancer
cell presenting said complex on its surface.
[0053] In another embodiment, the present invention relates to an
antibody or fragment thereof that binds to the RMF/HLA complex with
an EC50 that is at least 10-times lower than the EC50 of said
antibody or fragment thereof for the PIGQ/HLA complex.
[0054] In another embodiment, the present invention relates to an
antibody or fragment thereof that does not bind to the PIGQ/HLA
complex.
[0055] In another embodiment, the present invention relates to an
antibody or fragment thereof that has an EC50 of less than 10 nM in
a Fab format and in a immunoglobulin format.
[0056] In another embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises the HCDR1
region of SEQ ID NO: 7, the HCDR2 region of SEQ ID NO: 8, the HCDR3
region of SEQ ID NO: 9, the LCDR1 region of SEQ ID NO: 10, the
LCDR2 region of SEQ ID NO: 11 and the LCDR3 region of SEQ ID NO:
12.
[0057] In another embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises the HCDR1
region of SEQ ID NO: 17, the HCDR2 region of SEQ ID NO: 18, the
HCDR3 region of SEQ ID NO: 19, the LCDR1 region of SEQ ID NO: 20,
the LCDR2 region of SEQ ID NO: 21 and the LCDR3 region of SEQ ID
NO: 22.
[0058] In another embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises the HCDR1
region of SEQ ID NO: 27, the HCDR2 region of SEQ ID NO: 28, the
HCDR3 region of SEQ ID NO: 29, the LCDR1 region of SEQ ID NO: 30,
the LCDR2 region of SEQ ID NO: 31 and the LCDR3 region of SEQ ID
NO: 32.
[0059] In another embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises the HCDR1
region of SEQ ID NO: 37, the HCDR2 region of SEQ ID NO: 38, the
HCDR3 region of SEQ ID NO: 39, the LCDR1 region of SEQ ID NO: 40,
the LCDR2 region of SEQ ID NO: 41 and the LCDR3 region of SEQ ID
NO: 42.
[0060] In another embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or antibody fragment comprises the HCDR1
region of SEQ ID NO: 47, the HCDR2 region of SEQ ID NO: 48, the
HCDR3 region of SEQ ID NO: 49, the LCDR1 region of SEQ ID NO: 50,
the LCDR2 region of SEQ ID NO: 51 and the LCDR3 region of SEQ ID
NO: 52.
[0061] In another embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or antibody fragment comprises the HCDR1
region of SEQ ID NO: 57, the HCDR2 region of SEQ ID NO: 58, the
HCDR3 region of SEQ ID NO: 59, the LCDR1 region of SEQ ID NO: 60,
the LCDR2 region of SEQ ID NO: 61 and the LCDR3 region of SEQ ID
NO: 62.
[0062] In another embodiment of the present invention, the antibody
or fragment thereof specifically binds to the human WT1/HLA
complex.
[0063] In another embodiment of the present invention, the antibody
or fragment thereof is a monoclonal antibody or fragment.
[0064] In another embodiment of the present invention the antibody
or fragment thereof is a human, humanized or chimeric antibody or
fragment thereof. In another embodiment of the present invention
the antibody or fragment thereof is of the IgG isotype.
[0065] In one embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises a heavy chain
of SEQ ID NO: 5, and a light chain of SEQ ID NO: 6. In another
embodiment, the present invention relates to an antibody or
fragment thereof specific for the WT1/HLA complex, wherein said
antibody or fragment thereof comprises a heavy chain and a light
chain that has at least 60%, at least 70%, at least 80%, at least
90% or at least 95% identity to the a heavy chain of SEQ ID NO: 5
and to the light chain of SEQ ID NO: 6.
[0066] In one embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises a heavy chain
of SEQ ID NO: 15 and a light chain of SEQ ID NO: 16. In another
embodiment, the present invention relates to an antibody or
fragment thereof specific for the WT1/HLA complex, wherein said
antibody or fragment thereof comprises a heavy chain and a light
chain that has at least 60%, at least 70%, at least 80%, at least
90% or at least 95% identity to the a heavy chain of SEQ ID NO: 15
and to the light chain of SEQ ID NO: 16.
[0067] In one embodiment, the present invention relates to an
antibody or antibody fragment specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises a heavy chain
of SEQ ID NO: 25 and a light chain of SEQ ID NO: 26. In another
embodiment, the present invention relates to an antibody or
fragment thereof specific for the WT1/HLA complex, wherein said
antibody or fragment thereof comprises a heavy chain and a light
chain that has at least 60%, at least 70%, at least 80%, at least
90% or at least 95% identity to the a heavy chain of SEQ ID NO: 25
and to the light chain of SEQ ID NO: 26.
[0068] In one embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises a heavy chain
of SEQ ID NO: 35 and a light chain of SEQ ID NO: 36. In another
embodiment, the present invention relates to an antibody or
fragment thereof specific for the WT1/HLA complex, wherein said
antibody or fragment thereof comprises a heavy chain and a light
chain that has at least 60%, at least 70%, at least 80%, at least
90% or at least 95% identity to the a heavy chain of SEQ ID NO: 35
and to the light chain of SEQ ID NO: 36.
[0069] In one embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises a heavy chain
of SEQ ID NO: 45 and a light chain of SEQ ID NO: 46. In another
embodiment, the present invention relates to an antibody or
fragment thereof specific for the WT1/HLA complex, wherein said
antibody or fragment thereof comprises a heavy chain and a light
chain that has at least 60%, at least 70%, at least 80%, at least
90% or at least 95% identity to the a heavy chain of SEQ ID NO: 45
and to the light chain of SEQ ID NO: 46.
[0070] In one embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex,
wherein said antibody or fragment thereof comprises a heavy chain
of SEQ ID NO: 55 and a light chain of SEQ ID NO: 56. In another
embodiment, the present invention relates to an antibody or
fragment thereof specific for the WT1/HLA complex, wherein said
antibody or fragment thereof comprises a heavy chain and a light
chain that has at least 60%, at least 70%, at least 80%, at least
90% or at least 95% identity to the a heavy chain of SEQ ID NO: 55
and to the light chain of SEQ ID NO: 56.
[0071] In another embodiment of the present invention, the antibody
or fragment thereof is an isolated antibody or fragment
thereof.
[0072] In another embodiment of the present invention, the antibody
or fragment thereof is a recombinant antibody or fragment
thereof.
[0073] In one embodiment, the present invention relates to an
antibody or fragment thereof specific for the WT1/HLA complex for
use in the treatment of a WT1-positive disease. In another
embodiment, the present invention relates to an antibody or
fragment thereof specific for the WT1/HLA complex for use in the
treatment of disease characterized by the undesired presence and/or
expression of WT1.
[0074] In one embodiment, the present invention relates to a
nucleic acid composition comprising a nucleic acid sequence or a
plurality of nucleic acid sequences encoding an antibody or
fragment thereof that is specific for the WT1/HLA complex, wherein
said antibody or fragment thereof comprises the HCDR1 region of SEQ
ID NO: 7, the HCDR2 region of SEQ ID NO: 8, the HCDR3 region of SEQ
ID NO: 9, the LCDR1 region of SEQ ID NO: 10, the LCDR2 region of
SEQ ID NO: 11 and the LCDR3 region of SEQ ID NO: 12; the HCDR1
region of SEQ ID NO: 17, the HCDR2 region of SEQ ID NO: 18, the
HCDR3 region of SEQ ID NO: 19, the LCDR1 region of SEQ ID NO: 20,
the LCDR2 region of SEQ ID NO: 21 and the LCDR3 region of SEQ ID
NO: 22; the HCDR1 region of SEQ ID NO: 27, the HCDR2 region of SEQ
ID NO: 28, the HCDR3 region of SEQ ID NO: 29, the LCDR1 region of
SEQ ID NO: 30, the LCDR2 region of SEQ ID NO: 31 and the LCDR3
region of SEQ ID NO: 32; the HCDR1 region of SEQ ID NO: 37, the
HCDR2 region of SEQ ID NO: 38, the HCDR3 region of SEQ ID NO: 39,
the LCDR1 region of SEQ ID NO: 40, the LCDR2 region of SEQ ID NO:
41 and the LCDR3 region of SEQ ID NO: 42; the HCDR1 region of SEQ
ID NO: 47, the HCDR2 region of SEQ ID NO: 48, the HCDR3 region of
SEQ ID NO: 49, the LCDR1 region of SEQ ID NO: 50, the LCDR2 region
of SEQ ID NO: 51 and the LCDR3 region of SEQ ID NO: 52; or the
HCDR1 region of SEQ ID NO: 57, the HCDR2 region of SEQ ID NO: 58,
the HCDR3 region of SEQ ID NO: 59, the LCDR1 region of SEQ ID NO:
50, the LCDR2 region of SEQ ID NO: 51 and the LCDR3 region of SEQ
ID NO: 52.
[0075] In one embodiment, the present invention relates to a
nucleic acid molecule comprising at least one of
[0076] (a) the variable heavy chain DNA sequence of SEQ ID NO: 3
and the variable light chain DNA sequence of SEQ ID NO: 4;
[0077] (b) the variable heavy chain DNA sequence of SEQ ID NO: 13
and the variable light chain DNA sequence of SEQ ID NO: 14;
[0078] (c) the variable heavy chain DNA sequence of SEQ ID NO: 23
and the variable light chain DNA sequence of SEQ ID NO: 24;
[0079] (d) the variable heavy chain DNA sequence of SEQ ID NO: 33
and the variable light chain DNA sequence of SEQ ID NO: 34;
[0080] (e) the variable heavy chain DNA sequence of SEQ ID NO: 43
and the variable light chain DNA sequence of SEQ ID NO: 44; or
[0081] (f) the variable heavy chain DNA sequence of SEQ ID NO: 53
and the variable light chain DNA sequence of SEQ ID NO: 54.
[0082] In one embodiment, the present invention relates to two
nucleic acid molecules, wherein one nucleic acid molecule comprises
the DNA sequence of SEQ ID NO: 3, and the second nucleic acid
molecule comprises the DNA sequence of SEQ ID NO: 4;
[0083] one nucleic acid molecule comprises the DNA sequence of SEQ
ID NO: 13, and the second nucleic acid molecule comprises the DNA
sequence of SEQ ID NO: 14;
[0084] one nucleic acid molecule comprises the DNA sequence of SEQ
ID NO: 23, and the second nucleic acid molecule comprises the DNA
sequence of SEQ ID NO: 24;
[0085] one nucleic acid molecule comprises the DNA sequence of SEQ
ID NO: 33, and the second nucleic acid molecule comprises the DNA
sequence of SEQ ID NO: 34;
[0086] one nucleic acid molecule comprises the DNA sequence of SEQ
ID NO: 43, and the second nucleic acid molecule comprises the DNA
sequence of SEQ ID NO: 44; or
[0087] one nucleic acid molecule comprises the DNA sequence of SEQ
ID NO: 53, and the second nucleic acid molecule comprises the DNA
sequence of SEQ ID NO: 54.
[0088] In another embodiment, the present invention relates to a
vector composition comprising a vector or a plurality of vectors
comprising the nucleic acid sequence or plurality of nucleic acid
sequences encoding an antibody or fragment thereof as disclosed in
Table 1.
[0089] In one embodiment, the present invention relates to a cell
comprising a vector composition comprising a vector or a plurality
of vectors comprising the nucleic acid sequence or plurality of
nucleic acid sequences encoding an antibody or fragment thereof as
disclosed in Table 1.
[0090] In another embodiment, the present invention relates to a
pharmaceutical composition comprising an antibody or antibody
fragment as disclosed in Table 1 and a pharmaceutically acceptable
carrier or excipient.
[0091] In one embodiment, said antibody or fragment thereof
specifically binds to the RMF/HLA complex and has an EC50 of less
than 100 nM, 75 nM, 50 nM, 25 nM, 20 nM, 10 nM, 5 nM, 2.5 nM or 1
nM in a Fab format. In preferred embodiments, said antibody or
fragment thereof specifically binds to the RMF/HLA complex and has
an EC50 of less than 10 nm in a Fab format.
[0092] In one embodiment, said antibody or fragment thereof
specifically binds to the RMF/HLA complex and has an EC50 of less
than 100 nM, 75 nM, 50 nM, 25 nM, 20 nM, 10 nM, 5 nM, 2.5 nM or 1
nM in an immunoglobulin format. In preferred embodiments, said
antibody or fragment thereof specifically binds to the RMF/HLA
complex and has an EC50 of less than 10 nm in an immunoglobulin
format.
[0093] In one embodiment, said antibody or fragment thereof
specifically binds to the RMF/HLA complex and has an EC50 of less
than 100 nM, 75 nM, 50 nM, 25 nM, 20 nM, 10 nM, 5 nM, 2.5 nM or 1
nM in a Fab format and in an immunoglobulin format. In preferred
embodiments, said antibody or fragment thereof specifically binds
to the RMF/HLA complex and has an EC50 of less than 10 nm in a Fab
format and in an immunoglobulin format.
[0094] In one embodiment, said antibody or fragment thereof binds
to the RMF/HLA complex with an EC50 which is at least 25 times, at
least 15 times, at least 10 times or at least 5 times lower than
the EC50 for the PIGQ/HLA complex.
[0095] In one embodiment, said antibody or fragment thereof binds
to the RMF/HLA complex with an EC50 which is at least 25 times, at
least 15 times, at least 10 times or at least 5 times lower than
the EC50 for the PIGQ/HLA complex in a Fab format.
[0096] In one embodiment, said antibody or fragment thereof binds
to the RMF/HLA complex with an EC50 which is at least 25 times, at
least 15 times, at least 10 times or at least 5 times lower than
the EC50 for the PIGQ/HLA complex in an immunoglobulin format.
[0097] In one embodiment, said antibody or fragment thereof binds
to the RMF/HLA complex with an EC50 which is at least 25 times, at
least 15 times, at least 10 times or at least 5 times lower than
the EC50 for the PIGQ/HLA complex in a Fab format and in an
immunoglobulin format.
[0098] In certain embodiments, the EC50 values of the instant
applications are EC50 values as measures in ELISA assays. In
certain embodiments, the EC50 values of the instant applications
are EC50 values as measures in ELISA assays as exemplified
herein.
[0099] In one embodiment, said antibody or fragment thereof binds
to the RMF/HLA complex, but does not bind to the PIGQ/HLA
complex.
[0100] In one embodiment the present antibody or fragment thereof
specific for the RMF/HLA complex is a monoclonal antibody or
antibody fragment.
[0101] In one embodiment the present antibody or fragment thereof
specific for the RMF/HLA complex is a human, humanized or chimeric
antibody. In certain embodiments, said antibody or fragment thereof
specific for the RMF/HLA complex is an isolated antibody or
fragment thereof. In another embodiment said antibody or fragment
thereof is a recombinant antibody or fragment thereof. In a further
embodiment, said antibody or fragment thereof is a recombinant
human antibody or fragment thereof. In a further embodiment said
recombinant human antibody or fragment thereof is an isolated
recombinant human antibody or fragment thereof. In a further
embodiment said recombinant human antibody or fragment thereof or
isolated recombinant human antibody or fragment thereof is
monoclonal.
[0102] In another embodiment the present antibody or fragment
thereof comprises a heavy chain encoded by SEQ ID NO: 13 and a
light chain encoded by SEQ ID NO: 14, or a heavy chain encoded by
SEQ ID NO: 23 and a light chain encoded by SEQ ID NO: 24, or a
heavy chain encoded by SEQ ID NO: 33 and a light chain encoded by
SEQ ID NO: 34, or a heavy chain encoded by SEQ ID NO: 43 and a
light chain encoded by SEQ ID NO: 44, or a heavy chain encoded by
SEQ ID NO: 53 and a light chain encoded by SEQ ID NO: 54, or a
heavy chain encoded by SEQ ID NO: 63 and a light chain encoded by
SEQ ID NO: 64, or a heavy chain and a light chain that has at least
60%, at least 70%, at least 80%, at least 90% or at least 95%
homology aforementioned sequences.
[0103] In one embodiment the present antibody or fragment thereof
comprises a human heavy chain constant region and a human light
chain constant region. In a further embodiment said human heavy
chain constant region comprises the amino acid sequences of SEQ ID
NO: 5 and the human light chain constant region comprises the amino
acid sequences of SEQ ID NO: 6, or said human heavy chain constant
region comprises the amino acid sequences of SEQ ID NO: 15 and the
human light chain constant region comprises the amino acid
sequences of SEQ ID NO: 16, or said human heavy chain constant
region comprises the amino acid sequences of SEQ ID NO: 25 and the
human light chain constant region comprises the amino acid
sequences of SEQ ID NO: 26, or said human heavy chain constant
region comprises the amino acid sequences of SEQ ID NO: 35 and the
human light chain constant region comprises the amino acid
sequences of SEQ ID NO: 36, or said human heavy chain constant
region comprises the amino acid sequences of SEQ ID NO: 45 and the
human light chain constant region comprises the amino acid
sequences of SEQ ID NO: 46, or said human heavy chain constant
region comprises the amino acid sequences of SEQ ID NO: 55 and the
human light chain constant region comprises the amino acid
sequences of SEQ ID NO: 56.
[0104] In one embodiment, the disclosed antibody or fragment
thereof is of the IgG isotype. In another embodiment said antibody
is IgG1.
[0105] In one embodiment, the antibody fragment is a bivalent
antibody fragment.
[0106] In another embodiment, the present invention relates to an
antibody or fragment thereof that cross-competes with an antibody
described in Table 1. In one embodiment the present invention
relates to an antibody or fragment thereof, wherein said antibody
or fragment thereof cross-competes with an antibody or fragment
thereof comprising 6 CDRs defined by Kabat of one of the antibodies
in Table 1.
[0107] In another embodiment the present invention relates to an
antibody or fragment thereof, wherein said antibody or fragment
thereof cross-competes with an antibody or fragment thereof
comprising 6 CDRs, wherein the HCDR1 is the amino acid sequence of
SEQ ID NO: 7, the HCDR2 is the amino acid sequence of SEQ ID NO: 8,
the HCDR3 is the amino acid sequence of SEQ ID NO: 9, the LCDR1 is
the amino acid sequence of SEQ ID NO: 10, the LCDR2 is the amino
acid sequence of SEQ ID NO: 11 and the LCDR3 is the amino acid
sequence of SEQ ID NO: 12. In another embodiment the present
invention relates to an antibody or fragment thereof, wherein said
antibody or fragment thereof cross-competes with an antibody or
fragment thereof comprising the VH according to SEQ ID NO: 5 and
the VL according to SEQ ID NO: 6.
[0108] In another embodiment the present invention relates to an
antibody or fragment thereof, wherein said antibody or fragment
thereof cross-competes with an antibody or fragment thereof
comprising 6 CDRs, wherein the HCDR1 is the amino acid sequence of
SEQ ID NO: 17, the HCDR2 is the amino acid sequence of SEQ ID NO:
18, the HCDR3 is the amino acid sequence of SEQ ID NO: 19, the
LCDR1 is the amino acid sequence of SEQ ID NO: 20, the LCDR2 is the
amino acid sequence of SEQ ID NO: 21 and the LCDR3 is the amino
acid sequence of SEQ ID NO: 22. In another embodiment the present
invention relates to an antibody or fragment thereof, wherein said
antibody or fragment thereof cross-competes with an antibody or
fragment thereof comprising the VH according to SEQ ID NO: 15 and
the VL according to SEQ ID NO: 16.
[0109] In another embodiment the present invention relates to an
antibody or fragment thereof, wherein said antibody or fragment
thereof cross-competes with an antibody or fragment thereof
comprising 6 CDRs, wherein the HCDR1 is the amino acid sequence of
SEQ ID NO: 27, the HCDR2 is the amino acid sequence of SEQ ID NO:
28, the HCDR3 is the amino acid sequence of SEQ ID NO: 29, the
LCDR1 is the amino acid sequence of SEQ ID NO: 30, the LCDR2 is the
amino acid sequence of SEQ ID NO: 31 and the LCDR3 is the amino
acid sequence of SEQ ID NO: 32. In another embodiment the present
invention relates to an antibody or fragment thereof, wherein said
antibody or fragment thereof cross-competes with an antibody or
fragment thereof comprising the VH according to SEQ ID NO: 25 and
the VL according to SEQ ID NO: 26.
[0110] In another embodiment the present invention relates to an
antibody or fragment thereof, wherein said antibody or fragment
thereof cross-competes with an antibody or fragment thereof
comprising 6 CDRs, wherein the HCDR1 is the amino acid sequence of
SEQ ID NO: 37, the HCDR2 is the amino acid sequence of SEQ ID NO:
38, the HCDR3 is the amino acid sequence of SEQ ID NO: 39, the
LCDR1 is the amino acid sequence of SEQ ID NO: 40, the LCDR2 is the
amino acid sequence of SEQ ID NO: 41 and the LCDR3 is the amino
acid sequence of SEQ ID NO: 42. In another embodiment the present
invention relates to an antibody or fragment thereof, wherein said
antibody or fragment thereof cross-competes with an antibody or
fragment thereof comprising the VH according to SEQ ID NO: 35 and
the VL according to SEQ ID NO: 36.
[0111] In another embodiment the present invention relates to an
antibody or fragment thereof, wherein said antibody or fragment
thereof cross-competes with an antibody or fragment thereof
comprising 6 CDRs, wherein the HCDR1 is the amino acid sequence of
SEQ ID NO: 47, the HCDR2 is the amino acid sequence of SEQ ID NO:
48, the HCDR3 is the amino acid sequence of SEQ ID NO: 49, the
LCDR1 is the amino acid sequence of SEQ ID NO: 50, the LCDR2 is the
amino acid sequence of SEQ ID NO: 51 and the LCDR3 is the amino
acid sequence of SEQ ID NO: 52. In another embodiment the present
invention relates to an antibody or fragment thereof, wherein said
antibody or fragment thereof cross-competes with an antibody or
fragment thereof comprising the VH according to SEQ ID NO: 45 and
the VL according to SEQ ID NO: 46.
[0112] In another embodiment the present invention relates to an
antibody or fragment thereof, wherein said antibody or fragment
thereof cross-competes with an antibody or fragment thereof
comprising 6 CDRs, wherein the HCDR1 is the amino acid sequence of
SEQ ID NO: 57, the HCDR2 is the amino acid sequence of SEQ ID NO:
58, the HCDR3 is the amino acid sequence of SEQ ID NO: 59, the
LCDR1 is the amino acid sequence of SEQ ID NO: 60, the LCDR2 is the
amino acid sequence of SEQ ID NO: 61 and the LCDR3 is the amino
acid sequence of SEQ ID NO: 62. In another embodiment the present
invention relates to an antibody or fragment thereof, wherein said
antibody or fragment thereof cross-competes with an antibody or
fragment thereof comprising the VH according to SEQ ID NO: 55 and
the VL according to SEQ ID NO: 56.
[0113] In a certain embodiment, the invention relates to an
antibody or fragment thereof that cross-competes with an antibody
described in Table 1 and reduces the specific binding of one of the
antibodies described in Table 1 by at least 70%, 80% or 90% in an
ELISA-based cross-competition assay. In a certain embodiment, the
present invention relates to an monoclonal antibody or fragment
thereof that cross-competes with an antibody described in Table 1
and reduces the specific binding of one of the antibodies described
in Table 1 to the RMF/HLA complex by at least 70%, 80% or 90% in an
ELISA-based cross-competition assay. A representative assay set-up
is illustrated in Example 6 of the present invention.
[0114] In another embodiment, the present invention relates to an
antibody or fragment thereof that binds to (e.g., by binding,
stabilizing, spatial distribution) the same epitope as one of the
antibodies in Table 1. In a further embodiment said antibody or
fragment thereof bind to (e.g., by binding, stabilizing, spatial
distribution) the same epitope as an antibody or fragment thereof
comprising 6 CDRs defined by Kabat of one of the antibodies in
Table 1.
[0115] Regions of a given polypeptide that include an epitope can
be identified using any number of epitope mapping techniques, well
known in the art. See, e.g., Epitope Mapping Protocols in Methods
in Molecular Biology, Vol. 66 (Glenn E. Morris, Ed., 1996) Humana
Press, Totowa, N.J. For example, linear epitopes may be determined
by e.g., concurrently synthesizing large numbers of peptides on
solid supports, the peptides corresponding to portions of the
protein molecule, and reacting the peptides with antibodies while
the peptides are still attached to the supports. Such techniques
are known in the art and described in, e.g., U.S. Pat. No.
4,708,871; Geysen et al., (1984) Proc. Natl. Acad. Sci. USA
8:3998-4002; Geysen et al., (1985) Proc. Natl. Acad. Sci. USA
82:78-182; Geysen et al., (1986) Mol. Immunol. 23:709-715.
Similarly, conformational epitopes are readily identified by
determining spatial conformation of amino acids such as by, e.g.,
hydrogen/deuterium exchange, x-ray crystallography and
two-dimensional nuclear magnetic resonance. See, e.g., Epitope
Mapping Protocols, supra. Antigenic regions of proteins can also be
identified using standard antigenicity and hydropathy plots, such
as those calculated using, e.g., the Omiga version 1.0 software
program available from the Oxford Molecular Group. This computer
program employs the Hopp/Woods method, Hopp et al., (1981) Proc.
Natl. Acad. Sci USA 78:3824-3828; for determining antigenicity
profiles, and the Kyte-Doolittle technique, Kyte et al., (1982) J.
Mol. Biol. 157:105-132; for hydropathy plots.
[0116] In one embodiment, the present invention relates to an
antibody or fragment thereof comprising 6 CDRs defined by Kabat of
any of the antibodies in Table 1. In another aspect, the invention
pertains to an isolated monoclonal antibody or fragment thereof
comprising 6 CDRs defined by Kabat of each of the antibodies in
Table 1.
[0117] In another embodiment, the present invention relates to
antibodies or fragment thereof specific for the RMF/HLA complex,
wherein said antibodies or fragment thereof have a monovalent
affinity to the RMF/HLA complex with a dissociation rate constant
(K.sub.D) of less than 5.times.10.sup.-2M, less than 10.sup.-2M,
less than 5.times.10.sup.-3M, less than 10.sup.-3M, less than
5.times.10.sup.-4M, less than 10.sup.-4M, less than
5.times.10.sup.-5M, less than 10.sup.-5M, less than
5.times.10.sup.-6M, less than 10.sup.-6M, less than
5.times.10.sup.-7M, less than 10.sup.-7M, less than
5.times.10.sup.-8M, less than 10.sup.-8M, less than
5.times.10.sup.-9M, less than 10.sup.-9M, less than
5.times.10.sup.-10M, less than 10.sup.-10M, less than
5.times.10.sup.-11M, less than 10.sup.-11M, less than
5.times.10.sup.-12M, less than 10.sup.-12M, less than
5.times.10.sup.-13M, less than 10.sup.-13M, less than
5.times.10.sup.-14M, less than 10.sup.-14M, less than
5.times.10.sup.-15M, or less than 10.sup.-15M and wherein said
antibodies or fragment thereof in a bivalent format have an
affinity (apparent affinity) to the RMF/HLA complex with a
dissociation rate constant (K.sub.D) which is at least 2-fold,
5-fold, 10-fold, 100-fold, 1000-fold, 10000-fold, 100000-fold lower
than the dissociation rate constant (K.sub.D) in a monovalent
format. In a further embodiment the bivalent affinity of said
antibodies or fragments thereof is determined in an IgG-format,
wherein the monovalent affinity of said antibodies or fragments
thereof is determined in a Fab-format.
[0118] In another embodiment the present invention relates to the
use of said pharmaceutical composition for the treatment of a
disorder or condition associated with the undesired presence and/or
expression of WT1. In another embodiment said condition associated
with the undesired presence and/or expression of WT1 is cancer.
[0119] Such carriers, diluents and excipients are well known in the
art, and the skilled artisan will find a formulation and a route of
administration best suited to treat a subject with the RMF/HLA
antibodies or antibody fragments of the present disclosure.
[0120] In another embodiment, the present invention relates to a
method for the prophylaxis of an inflammatory disorder in a
subject, said method comprising administering an RMF/HLA complex
antagonist to said subject. "Prophylaxis" as used in this context
refers to methods which aim to prevent the onset of a disease or
which delay the onset of a disease.
[0121] In some embodiments, the subject is a human. In alternative
aspects, the subject is a rodent, such as a rat or a mouse.
[0122] In some embodiments, the antibodies or fragments thereof
specific for RMF/HLA of the present invention are administered
subcutaneously. In other aspects the antibodies or fragments
thereof specific for the RMF/HLA complex of the present invention
are administered intra-venously, intra-articularly or
intra-spinally.
[0123] In one embodiment, the invention pertains to an isolated
monoclonal antibody or fragment thereof, comprising a VH and a VL
of any of the antibodies in Table 1.
[0124] In another embodiment, the invention relates to a nucleic
acid encoding an isolated monoclonal antibody or fragment thereof,
wherein the nucleic acid comprises a VH and a VL of any of the
antibodies in Table 1.
TABLE-US-00002 TABLE 1 Sequences of the antibodies of the invention
Antibody# SEQ ID NO: [aa] / DNA "Aali" VH SEQ ID NO: 3
CAGGTGCAGCTGGTGGAAAGCGGCGGTGGCCTGGTGAAA (VH3-11)
CCAGGCGGTAGCCTGCGCCTGAGCTGCGCCGCCAGCGGC
TTTACCTTTAGCGATCATTACATTAGCTGGATTCGCCAG
GCCCCAGGCAAAGGCCTGGAATGGGTTAGCTATATTAGC
AGCAGTGGCAGCACCACCTATTACGCCGAGAGCGTGAAA
GGCCGCTTTACCATTAGCCGCGATAACGCCAAAAACAGC
CTGTATCTGCAAATGAACAGCCTGCGGGCCGAAGATACC
GCCGTGTATTATTGCGCGCGTACTTACGCATATCGTTAC
GATTTTGATCTGTGGGGCCAGGGCACCCTGGTTACTGTC TCGAGC VL SEQ ID NO: 4
CAGAGCGTGCTGACCCAGCCACCAAGCGTGAGCGGTGCA (lambda1-
CCAGGTCAGCGCGTGACCATTAGCTGCACCGGCAGCAGC 40)
AGCAACATTGGCGCAGGCTATGATGTGCATTGGTATCAG
CAGCTGCCAGGCACCGCACCGAAACTGCTGATTTATGGC
AACAGCAATCGCCCAAGCGGTGTGCCGGATCGCTTTAGC
GGCAGCAAAAGCGGCACCAGCGCCAGCCTGGCGATTACC
GGTCTGCAAGCCGAAGACGAAGCCGATTATTACTGCCAG
ACTTGGGTTCATTCTTACTCTACTCCGGTGTTTGGCGGC GGTACCAAGCTGACCGTGCTGGGCCAG
VH SEQ ID NO: 5 QVQLVESGGGLVKPGGSLRLSCAASGFTFSDHYISWIRQ
APGKGLEWVSYISSSGSTTYYAESVKGRFTISRDNAKNS
LYLQMNSLRAEDTAVYYCARTYAYRYDFDLWGQGTLVTV SS VL SEQ ID NO: 6
QSVLTQPPSVSGAPGQRVTISCTGSSSNIGAGYDVHWYQ
QLPGTAPKLLIYGNSNRPSGVPDRFSGSKSGTSASLAIT
GLQAEDEADYYCQTWVHSYSTPVFGGGTKLTVLGQ HCDR1 SEQ ID NO: 7 DHYIS HCDR2
SEQ ID NO: 8 YISSSGSTTYYAESVKG HCDR3 SEQ ID NO: 9 TYAYRYDFDL LCDR1
SEQ ID NO: TGSSSNIGAGYDVH 10 LCDR2 SEQ ID NO: GNSNRPS 11 LCDR3 SEQ
ID NO: QTWVHSYSTPV 12 "Bibi" VH SEQ ID NO:
GAAGTGCAGCTGGTGGAAAGCGGCGGTGGCCTGGTGAAA (VH3-11) 13
CCAGGCGGTAGCCTGCGCCTGAGCTGCGCCGCCAGCGGC
TTTACCTTTAGCAGCTATAGCATGAACTGGGTTCGCCAG
GCCCCAGGCAAAGGCCTGGAATGGGTTAGCAGCATCAGC
AGCAGTAGCAGCTATATCTATTACGCCGATAGCGTGAAA
GGCCGCTTTACCATTAGCCGCGATAACGCCAAAAACAGC
CTGTATCTGCAAATGAACAGCCTGCGGGCCGAAGATACC
GCCGTGTATTATTGCGCGCGAACTGAGAGCGTTTGGCAC
CTGGGTTTCGATATTTGGGGCCAGGGCACCCTGGTTACT GTCTCGAGC VL SEQ ID NO:
GATATTCAGATGACCCAGAGCCCGAGCAGCGTTAGCGCC (lambda1- 14
AGCGTGGGCGATCGCGTGACCATTACCTGCCGCGCCAGT 40)
CAGGGCATTAGCAGCTGGCTGGCCTGGTATCAGCAGAAA
CCGGGCAAAGCCCCGAAACTGCTGATCTATGCCGCCAGC
AGCCTGCAAAGCGGCGTGCCAAGTCGCTTTAGCGGCAGC
GGTAGCGGCACCGATTTCACCCTGACCATTAGCAGTCTG
CAACCGGAAGACTTTGCCACCTATTATTGCCAGCAGAAC
CATAAATACCCGATCACCTTCGGCCAGGGTACCAAAGTG GAAATCAAGCGGACC VH SEQ ID
NO: EVQLVESGGGLVKPGGSLRLSCAASGFTFSSYSMNWVRQ 15
APGKGLEWVSSISSSSSYIYYADSVKGRFTISRDNAKNS
LYLQMNSLRAEDTAVYYCARTESVWHLGFDIWGQGTLVT VSS VL SEQ ID NO:
DIQMTQSPSSVSASVGDRVTITCRASQGISSWLAWYQQK 16
PGKAPKLLIYAASSLQSGVPSRFSGSGSGTDFTLTISSL
QPEDFATYYCQQNHKYPITFGQGTKVEIKRT HCDR1 SEQ ID NO: SYSMN 17 HCDR2 SEQ
ID NO: SISSSSSYIYYADSVKG 18 HCDR3 SEQ ID NO: TESVWHLGFDI 19 LCDR1
SEQ ID NO: RASQGISSWLA 20 LCDR2 SEQ ID NO: AASSLQS 21 LCDR3 SEQ ID
NO: QQNHKYPIT 22 "Cyprus" VH SEQ ID NO:
CAGGTGCAGCTGGTGGAAAGCGGCGGTGGCCTGGTGAAA (VH3-11) 23
CCAGGCGGTAGCCTGCGCCTGAGCTGCGCCGCCAGCGGC
TTTACCTTTAGCGATTACTACATGAGCTGGATTCGCCAG
GCCCCAGGCAAAGGCCTGGAATGGGTTAGCTATATTAGC
AGCAGTGGCAGCACCATCTATTACGCCGATAGCGTGAAA
GGCCGCTTTACCATTAGCCGCGATAACGCCAAAAACAGC
CTGTATCTGCAAATGAACAGCCTGCGGGCCGAAGATACC
GCCGTGTATTATTGCGCGCGTGACGGACTGCGTTACTTC
TATGGATTTGATTACTGGGGCCAGGGCACCCTGGTTACT GTCTCGAGC VL SEQ ID NO:
CAGAGCGTGCTGACCCAGCCGCCGAGCGTTAGCGCCGCA (lambda1- 24
CCAGGCCAGAAAGTGACCATTAGCTGTAGCGGCAGCAGC 40)
AGCAACATCGGCAACAACTACGTTAGCTGGTATCAGCAG
CTGCCGGGCACCGCCCCGAAACTGCTGATCTATGATAAC
AACAAACGCCCGAGCGGCATCCCGGATCGCTTTAGCGGT
AGCAAAAGCGGCACCAGCGCCACCCTGGGCATTACCGGC
CTGCAAACCGAAGACGAAGCCGATTATTACTGCCAGGCT
TGGGTTCATTACTCTCTGGTTCATTGGGTGTTTGGCGGC GGTACCAAGCTGACCGTGCTGGGCCAG
VH SEQ ID NO: QVQLVESGGGLVKPGGSLRLSCAASGFTFSDYYMSWIRQ 25
APGKGLEWVSYISSSGSTIYYADSVKGRFTISRDNAKNS
LYLQMNSLRAEDTAVYYCARDGLRYFYGFDYWGQGTLVT VSS VL SEQ ID NO:
QSVLTQPPSVSAAPGQKVTISCSGSSSNIGNNYVSWYQQ 26
LPGTAPKLLIYDNNKRPSGIPDRFSGSKSGTSATLGITG
LQTEDEADYYCQAWVHYSLVHWVFGGGTKLTVLGQ HCDR1 SEQ ID NO: DYYMS 27 HCDR2
SEQ ID NO: YISSSGSTIYYADSVKG 28 HCDR3 SEQ ID NO: DGLRYFYGFDY 29
LCDR1 SEQ ID NO: SGSSSNIGNNYVS 30 LCDR2 SEQ ID NO: DNNKRPS 31 LCDR3
SEQ ID NO: QAWVHYSLVHWV 32 "Daniel" VH SEQ ID NO:
CAGGTGCAGCTGGTGCAGAGCGGTGCCGAAGTGAAAAAA (VH3-11) 33
CCAGGCGCCAGCGTGAAAGTTAGCTGCAAAGCCAGCGGC
TATACCTTCACCAGCTACTATATGCATTGGGTTCGCCAG
GCCCCAGGCCAGGGTCTGGAATGGATGGGCATTATTAAC
CCGAGCGGCGGCAGCACCAGCTATGCACAGAAATTTCAG
GGCCGCGTGACCATGACCCGCGATACCAGCACCAGCACC
GTGTATATGGAACTGAGCAGCCTGCGCAGCGAAGATACC
GCCGTGTATTATTGCGCGCGTGAGGGTTACACTCCTGGT
GGTAGCTACACTTTCGACATCTGGGGTCAGGGCACCCTG GTTACTGTCTCGAGC VL SEQ ID
NO: CAGAGCGTGCTGACCCAGCCGCCGAGCGTTAGCGCCGCA (lambda1- 34
CCAGGCCAGAAAGTGACCATTAGCTGTAGCGGCAGCAGC 40)
AGCAACATCGGCAACAACTACGTTAGCTGGTATCAGCAG
CTGCCGGGCACCGCCCCGAAACTGCTGATCTATGATAAC
AACAAACGCCCGAGCGGCATCCCGGATCGCTTTAGCGGT
AGCAAAAGCGGCACCAGCGCCACCCTGGGCATTACCGGC
CTGCAAACCGAAGACGAAGCCGATTATTACTGCGGTTCT
TGGGACGGTTTCGTTTCTTCTTACTCTGTGTTTGGCGGC GGTACCAAGCTGACCGTGCTGGGCCAG
VH SEQ ID NO: QVQLVQSGAEVKKPGASVKVSCKASGYTFTSYYMHWVRQ 35
APGQGLEWMGIINPSGGSTSYAQKFQGRVTMTRDTSTST
VYMELSSLRSEDTAVYYCAREGYTPGGSYTFDIWGQGTL VTVSS VL SEQ ID NO:
QSVLTQPPSVSAAPGQKVTISCSGSSSNIGNNYVSWYQQ 36
LPGTAPKLLIYDNNKRPSGIPDRFSGSKSGTSATLGITG
LQTEDEADYYCGSWDGFVSSYSVFGGGTKLTVLGQ HCDR1 SEQ ID NO: SYYMH 37 HCDR2
SEQ ID NO: IINPSGGSTSYAQKFQG 38 HCDR3 SEQ ID NO: EGYTPGGSYTEDI 39
LCDR1 SEQ ID NO: SGSSSNIGNNYVS 40 LCDR2 SEQ ID NO: DNNKRPS 41 LCDR3
SEQ ID NO: GSWDGFVSSYSV 42 "Elfu" VH SEQ ID NO:
GAAGTGCAGCTGGTGCAGAGCGGTGCCGAAGTGAAAAAA (VH3-11) 43
CCGGGCGAAAGCCTGAAAATCAGCTGCAAAGGCAGCGGC
TATAGCTTTACCAGCTATTGGATTAGCTGGGTTCGCCAG
ATGCCGGGCAAAGGCCTGGAATGGATGGGCATTATCTAT
CCGGGCACCAGCTATACCCGCTATAGCCCGAGCTTTCAG
GGCCAGGTTACAATTAGCGCCGACAAAAGCATCAGCACC
GCCTATCTGCAATGGAGCAGCCTGAAAGCCAGCGATACC
GCCATGTATTATTGCGCGCGAGGATACCACCTGCCTTAC
TTTGATTACTGGGGCCAGGGCACCCTGGTTACTGTCTCG AGC VL SEQ ID NO:
CAGAGCGTGCTGACCCAGCCACCAAGCGTGAGCGGTGCA (lambda1- 44
CCAGGTCAGCGCGTGACCATTAGCTGCACCGGCAGCAGC 40)
AGCAACATTGGCGCAGGCTATGATGTGCATTGGTATCAG
CAGCTGCCAGGCACCGCACCGAAACTGCTGATTTATGGC
AACAGCAATCGCCCAAGCGGTGTGCCGGATCGCTTTAGC
GGCAGCAAAAGCGGCACCAGCGCCAGCCTGGCGATTACC
GGTCTGCAAGCCGAAGACGAAGCCGATTATTACTGCCAG
GCTTACGCTTCTCCGACTCGTGTTGTGTTTGGCGGCGGT ACCAAGCTGACCGTGCTGGGCCAG VH
SEQ ID NO: EVQLVQSGAEVKKPGESLKISCKGSGYSFTSYWISWVRQ 45
MPGKGLEWMGIIYPGTSYTRYSPSFQGQVTISADKSIST
AYLQWSSLKASDTAMYYCARGYHLPYFDYWGQGTLVTVS S VL SEQ ID NO:
QSVLTQPPSVSGAPGQRVTISCTGSSSNIGAGYDVHWYQ 46
QLPGTAPKLLIYGNSNRPSGVPDRFSGSKSGTSASLAIT
GLQAEDEADYYCQAYASPTRVVFGGGTKLTVLGQ HCDR1 SEQ ID NO: SYWIS 47 HCDR2
SEQ ID NO: IIYPGTSYTRYSPSFQG 48 HCDR3 SEQ ID NO: GYHLPYFDY 49 LCDR1
SEQ ID NO: TGSSSNIGAGYDVH 50 LCDR2 SEQ ID NO: GNSNRPS 51 LCDR3 SEQ
ID NO: QAYASPTRVV 52 "Fiwi" VH SEQ ID NO:
GAAGTGCAGCTGGTGGAAAGCGGCGGTGGCCTGGTGAAA (VH3-11) 53
CCAGGCGGTAGCCTGCGCCTGAGCTGCGCCGCCAGCGGC
TTTACCTTTAGCAACTATTGGATTAGCTGGGTTCGCCAG
GCCCCAGGCAAAGGCCTGGAATGGGTTGGCCGCATCAAA
AGCAAAACCTATGGCGGCACCACCGATTATGCCGAGCCA
GTGAAAGGCCGCTTTACCATTAGCCGCGACGATAGCAAA
AACACCCTGTACCTGCAAATGAACAGCCTGAAAACCGAA
GATACCGCCGTGTATTATTGCGCGCGTGGTCGTTACCCT
GAGCTGGGATACTTCGATCTGTGGGGCCAGGGCACCCTG GTTACTGTCTCGAGC VL SEQ ID
NO: CAGAGCGTGCTGACCCAGCCGCCGAGCGTTAGCGCCGCA (lambda1- 54
CCAGGCCAGAAAGTGACCATTAGCTGTAGCGGCAGCAGC 40)
AGCAACATCGGCAACAACTACGTTAGCTGGTATCAGCAG
CTGCCGGGCACCGCCCCGAAACTGCTGATCTATGATAAC
AACAAACGCCCGAGCGGCATCCCGGATCGCTTTAGCGGT
AGCAAAAGCGGCACCAGCGCCACCCTGGGCATTACCGGC
CTGCAAACCGAAGACGAAGCCGATTATTACTGCGGTGCT
TGGGACTCTTACCTGTCTGTTTCTTTCGTGTTTGGCGGC GGTACCAAGCTGACCGTGCTGGGCCAG
VH SEQ ID NO: EVQLVESGGGLVKPGGSLRLSCAASGFTFSNYWISWVRQ 55
APGKGLEWVGRIKSKTYGGTTDYAEPVKGRFTISRDDSK
NTLYLQMNSLKTEDTAVYYCARGRYPELGYFDLWGQGTL VTVSS VL SEQ ID NO:
QSVLTQPPSVSAAPGQKVTISCSGSSSNIGNNYVSWYQQ 56
LPGTAPKLLIYDNNKRPSGIPDRFSGSKSGTSATLGITG
LQTEDEADYYCGAWDSYLSVSFVFGGGTKLTVLGQ HCDR1 SEQ ID NO: NYWIS 57 HCDR2
SEQ ID NO: RIKSKTYGGTTDYAEPVKG 58 HCDR3 SEQ ID NO: GRYPELGYFDL 59
LCDR1 SEQ ID NO: SGSSSNIGNNYVS 60 LCDR2 SEQ ID NO: DNNKRPS 61 LCDR3
SEQ ID NO: GAWDSYLSVSFV 62
BRIEF DESCRIPTION OF THE DRAWINGS
[0125] The present invention shall now be explained in the
following examples with reference to the figures, nevertheless,
without being limited thereto. For the purpose of the present
invention, all references as cited herein are incorporated by
reference in their entireties.
[0126] FIG. 1 shows the binding of six reference antibodies to the
RMF/HLA complex.
[0127] FIG. 2 shows the binding of six reference antibodies to the
RHAMM/HLA complex.
[0128] FIG. 3 shows the binding of six reference antibodies to the
PIGQ/HLA complex.
[0129] FIG. 4 shows the binding of the antibodies of the present
invention to the RMF/HLA complex.
[0130] FIG. 5 shows the binding of the antibodies of the present
invention to the RHAMM/HLA complex.
[0131] FIG. 6 shows the binding of the antibodies of the present
disclosure to the PIGQ/HLA complex.
EXAMPLES
Example 1: Generation of Antigens
[0132] The RMF/HLA complex was used as a target for antibody
selections. The target was produced as described in Dao et al. (Sci
Transl Med. 2013 Mar. 13; 5(176): 176ra33). Biotinylated
WT1/HLA-A0201 and RHAMM-R3/HLA_A0201 complexes were synthesized by
refolding the peptides with recombinant HLA-A2 and 2-microglobulin
within the Immunology Department (as described in Altman, et al.
1996. Phenotypic analysis of antigen specific T lymphocytes.
Science 274:94, and Jung, G., Ledbetter, J. A., and
Muller-Eberhard, H. J. (1987). Induction of cytotoxicity in resting
human T lymphocytes bound to tumor cells by antibody
heteroconjugates. Proceedings of the National Academy of Sciences
of the United States of America, 84(13), 4611-4615, with small
modifications).
[0133] As a negative control, the RHAMM/HLA complex was generated
(Dao et al., 2013). The RHAMM peptide has an amino sequence of
ILSLELMKL (SED ID NO: 63). The RHAMM peptide was complexed to
HLA-A0201.
[0134] As another negative control, a PIGQ/HLA complex was
generated. The PIGQ peptide was identified via the XPRESIDENT.RTM.
(immatics biotechnologies GmbH, Germany) target identification
platform (amino acid sequence of RMFPGEVAL (SED ID NO: 64)). It was
also complexed to HLA-A0201. The PIGQ peptide occurs ubiquitously
in healthy human tissue. Binding to the PIGQ/HLA complex is
therefore highly undesirable. Five out of nine amino acids of the
PIGQ peptide are identical to the WT1 peptide.
[0135] All antigens were produced in biotinylated and in
non-biotinylated form. Purity (>95%) and monomer portion
(>97-99%) of all peptides and HLA antigens was confirmed via
SDS-PAGE, analytical size exclusion chromatography and dynamic
light scattering.
Example 2: Generation of Reference Antibodies
[0136] Six RMF/HLA complex-binding antibodies are described on
WO2012/135854 (Memorial Sloan-Kettering). Five of these six
antibodies are also described in the Dao et al. referenced (see
above). Only Refmab #18 (see below) is not described in Dao et al.
(2013).
[0137] The sequences of these six antibodies (Refmab #3, Refmab #5,
Refmab #13, Refmab #15, Refmab #18 and Refmab #23) were cloned, and
human IgG1f antibodies were produced in HKB11 cells. Antibodies
were purified and subjected to quality control (yield,
concentration, purity and monomer content).
Example 3: Binding of Reference Antibodies to Isolated Antigens
[0138] In this experiment, the specificities of the reference
antibodies were investigated. Biotinylated peptide/HLA complexes
were coated on Neutravidin plates at 50 nM. The isolated reference
antibodies of Example 2 were titrated on the antigens: Binding was
tested in ELISA utilizing an AP-conjugated goat anti-human IgG
secondary antibody.
[0139] All reference antibodies bound to the RMF/HLA complex.
Refmab #23 also unspecifically bound to the RHAMM-HLA complex, as
has been described in the literature.
[0140] Interestingly all reference antibodies except for Refmab #18
also bound to the PIGQ/HLA complex, i.e. a peptide presented on
healthy human tissue. Only Refmab #18 was specific for the WT1-HLA
complex in ELISA. Results are shown in FIGS. 1-3.
Example 4: Binding of Reference Antibodies to Antigens on Cells
[0141] Since binding to an isolated antigen does not necessarily
coincide with binding to the antigen when presented on intact cells
it was investigated whether or not the control antibodies also
bound to the RMF/HLA complex on cells expressing this antigen.
[0142] SET2 cells (DSMZ No. ACC 608) and BV173 cells (DSMZ No. ACC
20) were used as antigen-positive cancer cells (see Dao et al.;
2013). Binding was measured by flow cytometry utilizing a
PE-conjugated goat anti-human IgG secondary antibody, and EC50
values were determined. Results are shown in Table 2. "++"
designates binding with an EC50 of below 10 nM, "+" designates
binding with an EC50 of more than 10 nM, and "---" designates no
binding to the target on cells.
TABLE-US-00003 TABLE 2 Binding of the reference antibodies (IgG) to
cells EC50 on SET2 EC50 on BV173 cells cells Binder [nM] [nM]
Refmab #3 --- --- Refmab #5 + + Refmab #13 ++ ++ Refmab #15 + +
Refmab #18 --- --- Refmab #23 + +
[0143] As can be seen in Table 2, two out of the six reference
antibodies do not bind to cells expressing the target. These
antibodies (including Refmab #18) are therefore no suitable for
therapeutically development.
Example 5: Identification of Superior RMF/HLA Complex Binders
[0144] For antibody generation the Ylanthia.RTM. library (MorphoSys
AG, Germany) was used to select Fab fragments against the WT1/HLA
complex. The Ylanthia.RTM. library (Tiller et al. mAbs 5:3, 1-26;
May/June (2013) and U.S. Pat. No. 8,728,981) is a commercially
available phagemid library and employs the CysDisplay.RTM.
technology for displaying the Fab on the phage surface (Lohning et
al., WO 2001/05950).
[0145] In order to isolate RMF/HLA complex-specific antibodies,
different panning strategies were used (solution panning,
plated-based panning). Each panning strategy comprised at least 3
individual rounds of panning against the RMF/HLA complex. The
selection of unspecific binders was inhibited by pre-blocking with
the PIGQ/HLA complex as a counter target.
[0146] The isolated binders were subjected to primary screening on
an Intellicyt HTFC Screening System utilizing fluorescent beads.
Three different antigens (WT1/HLA complex, RHAMM/HLA complex and
PIGQ/HLA complex) were tested in parallel. Hits that were positive
on the WT1-HLA complex antigen but negative on the other two
antigens were isolated and subjected to a secondary screening using
a more stringent ELISA assay. A selection of positive clones was
converted into IgG format. Six of the most promising candidates
were purified and characterized further. The sequences of the six
binders are shown in Table 1.
[0147] The binders were further subjected to in-depth
characterization. They were also directly compared to the
antibodies of the prior art. The EC50 of the binders was measured
in a monovalent Fab format, and as full-length immunoglobulins
(IgG1).
Example 6: Characterization of the Binders in the Fab Format
[0148] The binders were subjected to an in-depth characterization.
They were directly compared to the antibodies of the prior art in
an ELISA assay using Neutravidin plates as described in Example 3.
For selected reference antibodies and binders of the present
invention, the EC50 were determined. Results are summarized in
Table 3. "++" designates binding with an EC50 of below 10 nM, "+"
designates binding with an EC50 of more than 10 nM, and "---"
designates no binding.
[0149] The EC50 values on RMF/HLA are significantly lower (better)
than the EC50 values of the reference antibodies of the prior art.
All binders tested demonstrated an EC50 which was at least 3.3-fold
better than that of the best binder of the prior art. Three out of
the four binders tested demonstrated an EC50 which was at least
5.5-fold better than that of the best binder of the prior art. Two
out of the four binders tested demonstrated an EC50 which was at
least 7.5-fold better than that of the best binder in the prior
art. Furthermore, none of the binders of the present invention show
any binding to the counter targets, in particular no binding to the
PIGQ/HLA complex. Some degree of binding was observed for some of
the reference antibodies.
[0150] Affinities of the Fab fragments of binders Aali and Refmab
#13 for the antigen RMF/HLA were also measured with an Octet system
using the antigen immobilized to Streptavidin. The K.sub.D values
were determined as 66 nM for Aali and 590 nM for Refmab #13, also
confirming that the antibodies of the present invention have a
higher affinity.
TABLE-US-00004 TABLE 3 Summary of Fab characterization EC50 on EC50
on EC50 on RMF/HLA RHAMM/HLA PIGQ/HLA Binder [nM] [nM] [nM] "Aali"
++ --- --- "Cyprus" ++ --- --- "Daniel" ++ --- --- "Fiwi" + --- ---
Refmab #3 + + --- Refmab #13 + --- + Refmab #18 + --- --- Refmab
#23 + --- ---
Example 7: Specificity of the Binders in an Immunoglobulin
Format
[0151] In this experiment the specificities of the antibodies of
the present disclosure were investigated as described in Example 3.
Results are shown in FIGS. 4-6.
[0152] It was found that all binders are highly specific for the
RMF/HLA complex. None of the binders showed any cross-reactivity
with either the RHAMM-HLA complex or the PIGQ/HLA complex. This is
in striking contrast to the antibodies of the prior art (see
Example 3), which all (with the exception of Refmab #18), showed
cross-reactivity with a peptide/HLA-complex (PIGQ/HLA) that is
expressed on healthy human tissue.
Example 8: Affinities and EC50's of the Binders in an
Immunoglobulin Format
[0153] EC50 values were determined for the binders of the present
disclosure and the binders of the prior art (ELISAs were performed
on Neutravidin plates). Results are summarized in Table 4. "++"
designates binding with an EC50 of below 10 nM, "+" designates
binding with an EC50 of more than 10 nM, and "---" designates no
binding.
TABLE-US-00005 TABLE 4 Summary of EC50's of the binders (IgG) of
the present invention EC50 on EC50 on EC50 on RMF/HLA RHAMM/HLA
PIGQ/HLA Binder [nM] [nM] [nM] "Aali" ++ --- --- "Bibi" ++ --- ---
"Cyprus" ++ --- --- "Daniel" ++ --- --- "Elfu" ++ --- --- "Fiwi" ++
--- --- Refmab #3 ++ --- + Refmab #5 ++ + + Refmab #13 ++ --- ++
Refmab #15 ++ --- ++ Refmab #18 ++ --- --- Refmab #23 ++ + +
[0154] All binders (the binders of the present invention, as well
as the binders of the prior art) showed very low EC50 values
towards the RMF/HLA complex (with the exception of Refmab #3 and
Refmab #5 all EC50's were in fact <1 nM). However, all binders
of the prior art (except Refmab #18) also showed binding to the
PIGQ/HLA counter antigens. Two binders of the prior art even showed
binding to the RHAMM/HLA counter antigen.
[0155] The apparent affinity of the binders Aali and Refmab #13 was
measured for the RMF/HLA antigen with an Octet system. The apparent
affinity value for Refmab #13 was determined as 8.2 nM. The binding
of Aali was characterized by a very slow dissociation rate, which
exceeded the specification limits that were set in the system.
Compared to Refmab #13 (8.2 nM), the apparent affinity of Aali is
therefore <0.5 nM.
Example 9: Binding of the Antibodies of the Present Invention to
Cells
[0156] Example 4 was repeated with the antibodies of the present
disclosure, i.e. binding to RNF/HLA-positive SET2 cells (DSMZ No.
ACC 608) and BV173 cells (DSMZ No. ACC 20) was tested by flow
cytometry. EC50 values were determined. Results are shown in Table
5. "++" designates binding with an EC50 of below 10 nM, "+"
designates binding with an EC50 of more than 10 nM, and "---"
designates no binding to the target on cells.
TABLE-US-00006 TABLE 5 Summary of IgG characterization by flow
cytometry EC50 on SET2 cells EC50 on BV173 cells Binder [nM] [nM]
"Aali" ++ + "Bibi" + + "Cyprus" + + "Daniel" ++ + "Elfu" + + "Fiwi"
+ +
[0157] All antibodies of the present invention show binding to
WT1/HLA-expressing cells. This was also the case for most (4 out of
6) of the prior art antibodies, but most notably not for Refmab
#18, the only reference antibody that does not bind to
PIGQ/HLA.
[0158] The antibodies and binders of the present invention are
therefore characterized in that they specifically bind to the
RMF/HLA-complex without demonstrating any cross-reactivity to the
PIGQ/HLA complex. In addition, the antibodies of the present
disclosure also do bind to WT1/HLA expressing cell lines.
Example 7: Binding to Leukemic Patient Samples
[0159] The binders of the present invention are investigated for
their ability to detect the RMF epitope on primary AML cells. The
binders are expected to bind to AML blasts of patients. Results are
confirmed by flow cytometry analysis. Results confirm that the
level of RMF/HLA-A0201 on the surface of leukemia cells is adequate
to allow for a reactivity with the binders of the present
invention. The results also confirm that the levels of the target
molecule on negative healthy cells are insignificant.
Example 8: Mediation of ADCC Activity
[0160] The binders of the present invention are also investigated
for their potential to mediate ADCC, one of the major effector
mechanisms of therapeutic antibodies in humans. In the presence of
human PBMCs, the binders mediate a dose-dependent PBMC ADCC against
T2 cells (an antigen-processing-deficient cell line, see, for
example, WO 2012/135854) loaded with RMF peptide, but not T2 cells
alone or T2 cells pulsed with a control peptide. The binders are
also able to mediate ADCC against naturally presented RMF epitope
by HLA-A0201 molecule on tumor cells, such as the mesothelioma cell
line, JMN and the leukemia cell line BV173, but not to HLA-A2
negative cells, such as MSTO or HL-60. These results demonstrate
that the binders mediates specific ADCC against cells that
naturally express RMF and HLA-A0201 complex at physiologic levels
as well as on cell lines.
Example 9: Elimination of Human Leukemia Cells in NSG Mice
[0161] The binders of the present invention are further
investigated in an in vivo NOD SCID gamma (NSG) mice xenograft
model. Mice are xenografted intravenously 6 days previously with
BV173 bcr/abl positive acute lymphoblastic leukemia. At the time of
treatment, mice developed leukemia in their liver, spleen, and BM
as visible by luciferase imaging. The binders of the present
invention dramatically reduce the tumor burden for at least 30
days. Results are confirmed by titrating the dose of the antibody.
Sequence CWU 1
1
6419PRTHomo sapiens 1Arg Met Phe Pro Asn Ala Pro Tyr Leu1
52449PRTHomo sapiens 2Met Gly Ser Asp Val Arg Asp Leu Asn Ala Leu
Leu Pro Ala Val Pro1 5 10 15Ser Leu Gly Gly Gly Gly Gly Cys Ala Leu
Pro Val Ser Gly Ala Ala 20 25 30Gln Trp Ala Pro Val Leu Asp Phe Ala
Pro Pro Gly Ala Ser Ala Tyr 35 40 45Gly Ser Leu Gly Gly Pro Ala Pro
Pro Pro Ala Pro Pro Pro Pro Pro 50 55 60Pro Pro Pro Pro His Ser Phe
Ile Lys Gln Glu Pro Ser Trp Gly Gly65 70 75 80Ala Glu Pro His Glu
Glu Gln Cys Leu Ser Ala Phe Thr Val His Phe 85 90 95Ser Gly Gln Phe
Thr Gly Thr Ala Gly Ala Cys Arg Tyr Gly Pro Phe 100 105 110Gly Pro
Pro Pro Pro Ser Gln Ala Ser Ser Gly Gln Ala Arg Met Phe 115 120
125Pro Asn Ala Pro Tyr Leu Pro Ser Cys Leu Glu Ser Gln Pro Ala Ile
130 135 140Arg Asn Gln Gly Tyr Ser Thr Val Thr Phe Asp Gly Thr Pro
Ser Tyr145 150 155 160Gly His Thr Pro Ser His His Ala Ala Gln Phe
Pro Asn His Ser Phe 165 170 175Lys His Glu Asp Pro Met Gly Gln Gln
Gly Ser Leu Gly Glu Gln Gln 180 185 190Tyr Ser Val Pro Pro Pro Val
Tyr Gly Cys His Thr Pro Thr Asp Ser 195 200 205Cys Thr Gly Ser Gln
Ala Leu Leu Leu Arg Thr Pro Tyr Ser Ser Asp 210 215 220Asn Leu Tyr
Gln Met Thr Ser Gln Leu Glu Cys Met Thr Trp Asn Gln225 230 235
240Met Asn Leu Gly Ala Thr Leu Lys Gly Val Ala Ala Gly Ser Ser Ser
245 250 255Ser Val Lys Trp Thr Glu Gly Gln Ser Asn His Ser Thr Gly
Tyr Glu 260 265 270Ser Asp Asn His Thr Thr Pro Ile Leu Cys Gly Ala
Gln Tyr Arg Ile 275 280 285His Thr His Gly Val Phe Arg Gly Ile Gln
Asp Val Arg Arg Val Pro 290 295 300Gly Val Ala Pro Thr Leu Val Arg
Ser Ala Ser Glu Thr Ser Glu Lys305 310 315 320Arg Pro Phe Met Cys
Ala Tyr Pro Gly Cys Asn Lys Arg Tyr Phe Lys 325 330 335Leu Ser His
Leu Gln Met His Ser Arg Lys His Thr Gly Glu Lys Pro 340 345 350Tyr
Gln Cys Asp Phe Lys Asp Cys Glu Arg Arg Phe Ser Arg Ser Asp 355 360
365Gln Leu Lys Arg His Gln Arg Arg His Thr Gly Val Lys Pro Phe Gln
370 375 380Cys Lys Thr Cys Gln Arg Lys Phe Ser Arg Ser Asp His Leu
Lys Thr385 390 395 400His Thr Arg Thr His Thr Gly Lys Thr Ser Glu
Lys Pro Phe Ser Cys 405 410 415Arg Trp Pro Ser Cys Gln Lys Lys Phe
Ala Arg Ser Asp Glu Leu Val 420 425 430Arg His His Asn Met His Gln
Arg Asn Met Thr Lys Leu Gln Leu Ala 435 440 445Leu3357DNAHomo
sapiens 3caggtgcagc tggtggaaag cggcggtggc ctggtgaaac caggcggtag
cctgcgcctg 60agctgcgccg ccagcggctt tacctttagc gatcattaca ttagctggat
tcgccaggcc 120ccaggcaaag gcctggaatg ggttagctat attagcagca
gtggcagcac cacctattac 180gccgagagcg tgaaaggccg ctttaccatt
agccgcgata acgccaaaaa cagcctgtat 240ctgcaaatga acagcctgcg
ggccgaagat accgccgtgt attattgcgc gcgtacttac 300gcatatcgtt
acgattttga tctgtggggc cagggcaccc tggttactgt ctcgagc 3574339DNAHomo
sapiens 4cagagcgtgc tgacccagcc accaagcgtg agcggtgcac caggtcagcg
cgtgaccatt 60agctgcaccg gcagcagcag caacattggc gcaggctatg atgtgcattg
gtatcagcag 120ctgccaggca ccgcaccgaa actgctgatt tatggcaaca
gcaatcgccc aagcggtgtg 180ccggatcgct ttagcggcag caaaagcggc
accagcgcca gcctggcgat taccggtctg 240caagccgaag acgaagccga
ttattactgc cagacttggg ttcattctta ctctactccg 300gtgtttggcg
gcggtaccaa gctgaccgtg ctgggccag 3395119PRTHomo sapiens 5Gln Val Gln
Leu Val Glu Ser Gly Gly Gly Leu Val Lys Pro Gly Gly1 5 10 15Ser Leu
Arg Leu Ser Cys Ala Ala Ser Gly Phe Thr Phe Ser Asp His 20 25 30Tyr
Ile Ser Trp Ile Arg Gln Ala Pro Gly Lys Gly Leu Glu Trp Val 35 40
45Ser Tyr Ile Ser Ser Ser Gly Ser Thr Thr Tyr Tyr Ala Glu Ser Val
50 55 60Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Ala Lys Asn Ser Leu
Tyr65 70 75 80Leu Gln Met Asn Ser Leu Arg Ala Glu Asp Thr Ala Val
Tyr Tyr Cys 85 90 95Ala Arg Thr Tyr Ala Tyr Arg Tyr Asp Phe Asp Leu
Trp Gly Gln Gly 100 105 110Thr Leu Val Thr Val Ser Ser
1156113PRTHomo sapiens 6Gln Ser Val Leu Thr Gln Pro Pro Ser Val Ser
Gly Ala Pro Gly Gln1 5 10 15Arg Val Thr Ile Ser Cys Thr Gly Ser Ser
Ser Asn Ile Gly Ala Gly 20 25 30Tyr Asp Val His Trp Tyr Gln Gln Leu
Pro Gly Thr Ala Pro Lys Leu 35 40 45Leu Ile Tyr Gly Asn Ser Asn Arg
Pro Ser Gly Val Pro Asp Arg Phe 50 55 60Ser Gly Ser Lys Ser Gly Thr
Ser Ala Ser Leu Ala Ile Thr Gly Leu65 70 75 80Gln Ala Glu Asp Glu
Ala Asp Tyr Tyr Cys Gln Thr Trp Val His Ser 85 90 95Tyr Ser Thr Pro
Val Phe Gly Gly Gly Thr Lys Leu Thr Val Leu Gly 100 105
110Gln75PRTHomo sapiens 7Asp His Tyr Ile Ser1 5817PRTHomo sapiens
8Tyr Ile Ser Ser Ser Gly Ser Thr Thr Tyr Tyr Ala Glu Ser Val Lys1 5
10 15Gly910PRTHomo sapiens 9Thr Tyr Ala Tyr Arg Tyr Asp Phe Asp
Leu1 5 101014PRTHomo sapiens 10Thr Gly Ser Ser Ser Asn Ile Gly Ala
Gly Tyr Asp Val His1 5 10117PRTHomo sapiens 11Gly Asn Ser Asn Arg
Pro Ser1 51211PRTHomo sapiens 12Gln Thr Trp Val His Ser Tyr Ser Thr
Pro Val1 5 1013360DNAHomo sapiens 13gaagtgcagc tggtggaaag
cggcggtggc ctggtgaaac caggcggtag cctgcgcctg 60agctgcgccg ccagcggctt
tacctttagc agctatagca tgaactgggt tcgccaggcc 120ccaggcaaag
gcctggaatg ggttagcagc atcagcagca gtagcagcta tatctattac
180gccgatagcg tgaaaggccg ctttaccatt agccgcgata acgccaaaaa
cagcctgtat 240ctgcaaatga acagcctgcg ggccgaagat accgccgtgt
attattgcgc gcgaactgag 300agcgtttggc acctgggttt cgatatttgg
ggccagggca ccctggttac tgtctcgagc 36014327DNAHomo sapiens
14gatattcaga tgacccagag cccgagcagc gttagcgcca gcgtgggcga tcgcgtgacc
60attacctgcc gcgccagtca gggcattagc agctggctgg cctggtatca gcagaaaccg
120ggcaaagccc cgaaactgct gatctatgcc gccagcagcc tgcaaagcgg
cgtgccaagt 180cgctttagcg gcagcggtag cggcaccgat ttcaccctga
ccattagcag tctgcaaccg 240gaagactttg ccacctatta ttgccagcag
aaccataaat acccgatcac cttcggccag 300ggtaccaaag tggaaatcaa gcggacc
32715120PRTHomo sapiens 15Glu Val Gln Leu Val Glu Ser Gly Gly Gly
Leu Val Lys Pro Gly Gly1 5 10 15Ser Leu Arg Leu Ser Cys Ala Ala Ser
Gly Phe Thr Phe Ser Ser Tyr 20 25 30Ser Met Asn Trp Val Arg Gln Ala
Pro Gly Lys Gly Leu Glu Trp Val 35 40 45Ser Ser Ile Ser Ser Ser Ser
Ser Tyr Ile Tyr Tyr Ala Asp Ser Val 50 55 60Lys Gly Arg Phe Thr Ile
Ser Arg Asp Asn Ala Lys Asn Ser Leu Tyr65 70 75 80Leu Gln Met Asn
Ser Leu Arg Ala Glu Asp Thr Ala Val Tyr Tyr Cys 85 90 95Ala Arg Thr
Glu Ser Val Trp His Leu Gly Phe Asp Ile Trp Gly Gln 100 105 110Gly
Thr Leu Val Thr Val Ser Ser 115 12016109PRTHomo sapiens 16Asp Ile
Gln Met Thr Gln Ser Pro Ser Ser Val Ser Ala Ser Val Gly1 5 10 15Asp
Arg Val Thr Ile Thr Cys Arg Ala Ser Gln Gly Ile Ser Ser Trp 20 25
30Leu Ala Trp Tyr Gln Gln Lys Pro Gly Lys Ala Pro Lys Leu Leu Ile
35 40 45Tyr Ala Ala Ser Ser Leu Gln Ser Gly Val Pro Ser Arg Phe Ser
Gly 50 55 60Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr Ile Ser Ser Leu
Gln Pro65 70 75 80Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln Asn His
Lys Tyr Pro Ile 85 90 95Thr Phe Gly Gln Gly Thr Lys Val Glu Ile Lys
Arg Thr 100 105175PRTHomo sapiens 17Ser Tyr Ser Met Asn1
51817PRTHomo sapiens 18Ser Ile Ser Ser Ser Ser Ser Tyr Ile Tyr Tyr
Ala Asp Ser Val Lys1 5 10 15Gly1911PRTHomo sapiens 19Thr Glu Ser
Val Trp His Leu Gly Phe Asp Ile1 5 102011PRTHomo sapiens 20Arg Ala
Ser Gln Gly Ile Ser Ser Trp Leu Ala1 5 10217PRTHomo sapiens 21Ala
Ala Ser Ser Leu Gln Ser1 5229PRTHomo sapiens 22Gln Gln Asn His Lys
Tyr Pro Ile Thr1 523360DNAHomo sapiens 23caggtgcagc tggtggaaag
cggcggtggc ctggtgaaac caggcggtag cctgcgcctg 60agctgcgccg ccagcggctt
tacctttagc gattactaca tgagctggat tcgccaggcc 120ccaggcaaag
gcctggaatg ggttagctat attagcagca gtggcagcac catctattac
180gccgatagcg tgaaaggccg ctttaccatt agccgcgata acgccaaaaa
cagcctgtat 240ctgcaaatga acagcctgcg ggccgaagat accgccgtgt
attattgcgc gcgtgacgga 300ctgcgttact tctatggatt tgattactgg
ggccagggca ccctggttac tgtctcgagc 36024339DNAHomo sapiens
24cagagcgtgc tgacccagcc gccgagcgtt agcgccgcac caggccagaa agtgaccatt
60agctgtagcg gcagcagcag caacatcggc aacaactacg ttagctggta tcagcagctg
120ccgggcaccg ccccgaaact gctgatctat gataacaaca aacgcccgag
cggcatcccg 180gatcgcttta gcggtagcaa aagcggcacc agcgccaccc
tgggcattac cggcctgcaa 240accgaagacg aagccgatta ttactgccag
gcttgggttc attactctct ggttcattgg 300gtgtttggcg gcggtaccaa
gctgaccgtg ctgggccag 33925120PRTHomo sapiens 25Gln Val Gln Leu Val
Glu Ser Gly Gly Gly Leu Val Lys Pro Gly Gly1 5 10 15Ser Leu Arg Leu
Ser Cys Ala Ala Ser Gly Phe Thr Phe Ser Asp Tyr 20 25 30Tyr Met Ser
Trp Ile Arg Gln Ala Pro Gly Lys Gly Leu Glu Trp Val 35 40 45Ser Tyr
Ile Ser Ser Ser Gly Ser Thr Ile Tyr Tyr Ala Asp Ser Val 50 55 60Lys
Gly Arg Phe Thr Ile Ser Arg Asp Asn Ala Lys Asn Ser Leu Tyr65 70 75
80Leu Gln Met Asn Ser Leu Arg Ala Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95Ala Arg Asp Gly Leu Arg Tyr Phe Tyr Gly Phe Asp Tyr Trp Gly
Gln 100 105 110Gly Thr Leu Val Thr Val Ser Ser 115 12026113PRTHomo
sapiens 26Gln Ser Val Leu Thr Gln Pro Pro Ser Val Ser Ala Ala Pro
Gly Gln1 5 10 15Lys Val Thr Ile Ser Cys Ser Gly Ser Ser Ser Asn Ile
Gly Asn Asn 20 25 30Tyr Val Ser Trp Tyr Gln Gln Leu Pro Gly Thr Ala
Pro Lys Leu Leu 35 40 45Ile Tyr Asp Asn Asn Lys Arg Pro Ser Gly Ile
Pro Asp Arg Phe Ser 50 55 60Gly Ser Lys Ser Gly Thr Ser Ala Thr Leu
Gly Ile Thr Gly Leu Gln65 70 75 80Thr Glu Asp Glu Ala Asp Tyr Tyr
Cys Gln Ala Trp Val His Tyr Ser 85 90 95Leu Val His Trp Val Phe Gly
Gly Gly Thr Lys Leu Thr Val Leu Gly 100 105 110Gln275PRTHomo
sapiens 27Asp Tyr Tyr Met Ser1 52817PRTHomo sapiens 28Tyr Ile Ser
Ser Ser Gly Ser Thr Ile Tyr Tyr Ala Asp Ser Val Lys1 5 10
15Gly2911PRTHomo sapiens 29Asp Gly Leu Arg Tyr Phe Tyr Gly Phe Asp
Tyr1 5 103013PRTHomo sapiens 30Ser Gly Ser Ser Ser Asn Ile Gly Asn
Asn Tyr Val Ser1 5 10317PRTHomo sapiens 31Asp Asn Asn Lys Arg Pro
Ser1 53212PRTHomo sapiens 32Gln Ala Trp Val His Tyr Ser Leu Val His
Trp Val1 5 1033366DNAHomo sapiens 33caggtgcagc tggtgcagag
cggtgccgaa gtgaaaaaac caggcgccag cgtgaaagtt 60agctgcaaag ccagcggcta
taccttcacc agctactata tgcattgggt tcgccaggcc 120ccaggccagg
gtctggaatg gatgggcatt attaacccga gcggcggcag caccagctat
180gcacagaaat ttcagggccg cgtgaccatg acccgcgata ccagcaccag
caccgtgtat 240atggaactga gcagcctgcg cagcgaagat accgccgtgt
attattgcgc gcgtgagggt 300tacactcctg gtggtagcta cactttcgac
atctggggtc agggcaccct ggttactgtc 360tcgagc 36634339DNAHomo sapiens
34cagagcgtgc tgacccagcc gccgagcgtt agcgccgcac caggccagaa agtgaccatt
60agctgtagcg gcagcagcag caacatcggc aacaactacg ttagctggta tcagcagctg
120ccgggcaccg ccccgaaact gctgatctat gataacaaca aacgcccgag
cggcatcccg 180gatcgcttta gcggtagcaa aagcggcacc agcgccaccc
tgggcattac cggcctgcaa 240accgaagacg aagccgatta ttactgcggt
tcttgggacg gtttcgtttc ttcttactct 300gtgtttggcg gcggtaccaa
gctgaccgtg ctgggccag 33935122PRTHomo sapiens 35Gln Val Gln Leu Val
Gln Ser Gly Ala Glu Val Lys Lys Pro Gly Ala1 5 10 15Ser Val Lys Val
Ser Cys Lys Ala Ser Gly Tyr Thr Phe Thr Ser Tyr 20 25 30Tyr Met His
Trp Val Arg Gln Ala Pro Gly Gln Gly Leu Glu Trp Met 35 40 45Gly Ile
Ile Asn Pro Ser Gly Gly Ser Thr Ser Tyr Ala Gln Lys Phe 50 55 60Gln
Gly Arg Val Thr Met Thr Arg Asp Thr Ser Thr Ser Thr Val Tyr65 70 75
80Met Glu Leu Ser Ser Leu Arg Ser Glu Asp Thr Ala Val Tyr Tyr Cys
85 90 95Ala Arg Glu Gly Tyr Thr Pro Gly Gly Ser Tyr Thr Phe Asp Ile
Trp 100 105 110Gly Gln Gly Thr Leu Val Thr Val Ser Ser 115
12036113PRTHomo sapiens 36Gln Ser Val Leu Thr Gln Pro Pro Ser Val
Ser Ala Ala Pro Gly Gln1 5 10 15Lys Val Thr Ile Ser Cys Ser Gly Ser
Ser Ser Asn Ile Gly Asn Asn 20 25 30Tyr Val Ser Trp Tyr Gln Gln Leu
Pro Gly Thr Ala Pro Lys Leu Leu 35 40 45Ile Tyr Asp Asn Asn Lys Arg
Pro Ser Gly Ile Pro Asp Arg Phe Ser 50 55 60Gly Ser Lys Ser Gly Thr
Ser Ala Thr Leu Gly Ile Thr Gly Leu Gln65 70 75 80Thr Glu Asp Glu
Ala Asp Tyr Tyr Cys Gly Ser Trp Asp Gly Phe Val 85 90 95Ser Ser Tyr
Ser Val Phe Gly Gly Gly Thr Lys Leu Thr Val Leu Gly 100 105
110Gln375PRTHomo sapiens 37Ser Tyr Tyr Met His1 53817PRTHomo
sapiens 38Ile Ile Asn Pro Ser Gly Gly Ser Thr Ser Tyr Ala Gln Lys
Phe Gln1 5 10 15Gly3913PRTHomo sapiens 39Glu Gly Tyr Thr Pro Gly
Gly Ser Tyr Thr Phe Asp Ile1 5 104013PRTHomo sapiens 40Ser Gly Ser
Ser Ser Asn Ile Gly Asn Asn Tyr Val Ser1 5 10417PRTHomo sapiens
41Asp Asn Asn Lys Arg Pro Ser1 54212PRTHomo sapiens 42Gly Ser Trp
Asp Gly Phe Val Ser Ser Tyr Ser Val1 5 1043354DNAHomo sapiens
43gaagtgcagc tggtgcagag cggtgccgaa gtgaaaaaac cgggcgaaag cctgaaaatc
60agctgcaaag gcagcggcta tagctttacc agctattgga ttagctgggt tcgccagatg
120ccgggcaaag gcctggaatg gatgggcatt atctatccgg gcaccagcta
tacccgctat 180agcccgagct ttcagggcca ggttacaatt agcgccgaca
aaagcatcag caccgcctat 240ctgcaatgga gcagcctgaa agccagcgat
accgccatgt attattgcgc gcgaggatac 300cacctgcctt actttgatta
ctggggccag ggcaccctgg ttactgtctc gagc 35444336DNAHomo sapiens
44cagagcgtgc tgacccagcc accaagcgtg agcggtgcac caggtcagcg cgtgaccatt
60agctgcaccg gcagcagcag caacattggc gcaggctatg atgtgcattg gtatcagcag
120ctgccaggca ccgcaccgaa actgctgatt tatggcaaca gcaatcgccc
aagcggtgtg 180ccggatcgct ttagcggcag caaaagcggc accagcgcca
gcctggcgat taccggtctg 240caagccgaag acgaagccga ttattactgc
caggcttacg cttctccgac tcgtgttgtg 300tttggcggcg gtaccaagct
gaccgtgctg ggccag 33645118PRTHomo sapiens 45Glu Val Gln Leu Val Gln
Ser Gly Ala Glu Val Lys Lys Pro Gly Glu1 5 10 15Ser Leu Lys Ile Ser
Cys Lys Gly Ser Gly Tyr Ser Phe Thr Ser Tyr 20 25 30Trp Ile Ser Trp
Val Arg Gln Met Pro Gly Lys Gly Leu Glu Trp Met 35 40 45Gly Ile Ile
Tyr Pro Gly Thr Ser Tyr Thr Arg Tyr Ser Pro Ser Phe 50 55 60Gln Gly
Gln Val Thr Ile Ser Ala Asp Lys Ser Ile Ser Thr Ala Tyr65 70 75
80Leu Gln Trp Ser Ser Leu Lys Ala Ser Asp Thr Ala Met Tyr Tyr Cys
85 90 95Ala Arg Gly Tyr His Leu Pro Tyr Phe Asp Tyr Trp Gly Gln Gly
Thr 100 105 110Leu Val Thr
Val Ser Ser 11546112PRTHomo sapiens 46Gln Ser Val Leu Thr Gln Pro
Pro Ser Val Ser Gly Ala Pro Gly Gln1 5 10 15Arg Val Thr Ile Ser Cys
Thr Gly Ser Ser Ser Asn Ile Gly Ala Gly 20 25 30Tyr Asp Val His Trp
Tyr Gln Gln Leu Pro Gly Thr Ala Pro Lys Leu 35 40 45Leu Ile Tyr Gly
Asn Ser Asn Arg Pro Ser Gly Val Pro Asp Arg Phe 50 55 60Ser Gly Ser
Lys Ser Gly Thr Ser Ala Ser Leu Ala Ile Thr Gly Leu65 70 75 80Gln
Ala Glu Asp Glu Ala Asp Tyr Tyr Cys Gln Ala Tyr Ala Ser Pro 85 90
95Thr Arg Val Val Phe Gly Gly Gly Thr Lys Leu Thr Val Leu Gly Gln
100 105 110475PRTHomo sapiens 47Ser Tyr Trp Ile Ser1 54817PRTHomo
sapiens 48Ile Ile Tyr Pro Gly Thr Ser Tyr Thr Arg Tyr Ser Pro Ser
Phe Gln1 5 10 15Gly499PRTHomo sapiens 49Gly Tyr His Leu Pro Tyr Phe
Asp Tyr1 55014PRTHomo sapiens 50Thr Gly Ser Ser Ser Asn Ile Gly Ala
Gly Tyr Asp Val His1 5 10517PRTHomo sapiens 51Gly Asn Ser Asn Arg
Pro Ser1 55210PRTHomo sapiens 52Gln Ala Tyr Ala Ser Pro Thr Arg Val
Val1 5 1053366DNAHomo sapiens 53gaagtgcagc tggtggaaag cggcggtggc
ctggtgaaac caggcggtag cctgcgcctg 60agctgcgccg ccagcggctt tacctttagc
aactattgga ttagctgggt tcgccaggcc 120ccaggcaaag gcctggaatg
ggttggccgc atcaaaagca aaacctatgg cggcaccacc 180gattatgccg
agccagtgaa aggccgcttt accattagcc gcgacgatag caaaaacacc
240ctgtacctgc aaatgaacag cctgaaaacc gaagataccg ccgtgtatta
ttgcgcgcgt 300ggtcgttacc ctgagctggg atacttcgat ctgtggggcc
agggcaccct ggttactgtc 360tcgagc 36654339DNAHomo sapiens
54cagagcgtgc tgacccagcc gccgagcgtt agcgccgcac caggccagaa agtgaccatt
60agctgtagcg gcagcagcag caacatcggc aacaactacg ttagctggta tcagcagctg
120ccgggcaccg ccccgaaact gctgatctat gataacaaca aacgcccgag
cggcatcccg 180gatcgcttta gcggtagcaa aagcggcacc agcgccaccc
tgggcattac cggcctgcaa 240accgaagacg aagccgatta ttactgcggt
gcttgggact cttacctgtc tgtttctttc 300gtgtttggcg gcggtaccaa
gctgaccgtg ctgggccag 33955122PRTHomo sapiens 55Glu Val Gln Leu Val
Glu Ser Gly Gly Gly Leu Val Lys Pro Gly Gly1 5 10 15Ser Leu Arg Leu
Ser Cys Ala Ala Ser Gly Phe Thr Phe Ser Asn Tyr 20 25 30Trp Ile Ser
Trp Val Arg Gln Ala Pro Gly Lys Gly Leu Glu Trp Val 35 40 45Gly Arg
Ile Lys Ser Lys Thr Tyr Gly Gly Thr Thr Asp Tyr Ala Glu 50 55 60Pro
Val Lys Gly Arg Phe Thr Ile Ser Arg Asp Asp Ser Lys Asn Thr65 70 75
80Leu Tyr Leu Gln Met Asn Ser Leu Lys Thr Glu Asp Thr Ala Val Tyr
85 90 95Tyr Cys Ala Arg Gly Arg Tyr Pro Glu Leu Gly Tyr Phe Asp Leu
Trp 100 105 110Gly Gln Gly Thr Leu Val Thr Val Ser Ser 115
12056113PRTHomo sapiens 56Gln Ser Val Leu Thr Gln Pro Pro Ser Val
Ser Ala Ala Pro Gly Gln1 5 10 15Lys Val Thr Ile Ser Cys Ser Gly Ser
Ser Ser Asn Ile Gly Asn Asn 20 25 30Tyr Val Ser Trp Tyr Gln Gln Leu
Pro Gly Thr Ala Pro Lys Leu Leu 35 40 45Ile Tyr Asp Asn Asn Lys Arg
Pro Ser Gly Ile Pro Asp Arg Phe Ser 50 55 60Gly Ser Lys Ser Gly Thr
Ser Ala Thr Leu Gly Ile Thr Gly Leu Gln65 70 75 80Thr Glu Asp Glu
Ala Asp Tyr Tyr Cys Gly Ala Trp Asp Ser Tyr Leu 85 90 95Ser Val Ser
Phe Val Phe Gly Gly Gly Thr Lys Leu Thr Val Leu Gly 100 105
110Gln575PRTHomo sapiens 57Asn Tyr Trp Ile Ser1 55819PRTHomo
sapiens 58Arg Ile Lys Ser Lys Thr Tyr Gly Gly Thr Thr Asp Tyr Ala
Glu Pro1 5 10 15Val Lys Gly5911PRTHomo sapiens 59Gly Arg Tyr Pro
Glu Leu Gly Tyr Phe Asp Leu1 5 106013PRTHomo sapiens 60Ser Gly Ser
Ser Ser Asn Ile Gly Asn Asn Tyr Val Ser1 5 10617PRTHomo sapiens
61Asp Asn Asn Lys Arg Pro Ser1 56212PRTHomo sapiens 62Gly Ala Trp
Asp Ser Tyr Leu Ser Val Ser Phe Val1 5 10639PRTHomo sapiens 63Ile
Leu Ser Leu Glu Leu Met Lys Leu1 5649PRTHomo sapiens 64Arg Met Phe
Pro Gly Glu Val Ala Leu1 5
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