U.S. patent application number 12/438889 was filed with the patent office on 2009-10-01 for constructs for enhancing immune responses.
Invention is credited to Hildegund C.J. Ertl, Marcio Lasaro.
Application Number | 20090246220 12/438889 |
Document ID | / |
Family ID | 38779709 |
Filed Date | 2009-10-01 |
United States Patent
Application |
20090246220 |
Kind Code |
A1 |
Ertl; Hildegund C.J. ; et
al. |
October 1, 2009 |
CONSTRUCTS FOR ENHANCING IMMUNE RESPONSES
Abstract
Chimeric protein constructs including a herpesvirus glycoprotein
D (gD) and a heterologous polypeptide that interact with herpes
virus entry mediator (HVEM) and enhance and enhance an immune
response against the heterologous polypeptide and methods for their
use are provided.
Inventors: |
Ertl; Hildegund C.J.;
(Villanova, PA) ; Lasaro; Marcio; (Maple Shade,
NJ) |
Correspondence
Address: |
BANNER & WITCOFF, LTD.
1100 13th STREET, N.W., SUITE 1200
WASHINGTON
DC
20005-4051
US
|
Family ID: |
38779709 |
Appl. No.: |
12/438889 |
Filed: |
August 28, 2007 |
PCT Filed: |
August 28, 2007 |
PCT NO: |
PCT/US07/18939 |
371 Date: |
February 25, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60840526 |
Aug 28, 2006 |
|
|
|
Current U.S.
Class: |
424/192.1 ;
424/184.1; 435/320.1; 530/350; 536/23.4 |
Current CPC
Class: |
C12N 2710/10043
20130101; Y02A 50/412 20180101; C07K 2319/00 20130101; Y02A 50/30
20180101; A61K 2039/57 20130101; C12N 7/00 20130101; A61K 39/12
20130101; C12N 2710/16622 20130101; A61P 31/22 20180101; C07K
14/005 20130101; C12N 2710/16634 20130101; A61K 2039/53 20130101;
A61K 39/245 20130101; C07K 2319/10 20130101 |
Class at
Publication: |
424/192.1 ;
536/23.4; 530/350; 435/320.1; 424/184.1 |
International
Class: |
A61K 39/00 20060101
A61K039/00; C07H 21/04 20060101 C07H021/04; C07K 14/00 20060101
C07K014/00; C12N 15/63 20060101 C12N015/63 |
Goverment Interests
[0002] This invention was made using funds from NIAID/NIH grant 5
P01 A1052271. The government retains certain rights in the
invention.
Claims
1. A nucleic acid molecule which encodes a fusion protein
comprising: a first polypeptide segment comprising at least amino
acids 1-240 of a mature Herpes simplex virus (HSV) glycoprotein D,
wherein the first polypeptide segment does not comprise a full
length mature glycoprotein D; a second polypeptide segment
comprising at least one antigen, wherein the at least one antigen
is not an HSV glycoprotein D antigen, wherein the N terminus of the
second polypeptide segment is linked to the C terminus of the first
polypeptide segment; and a third polypeptide segment comprising a C
terminal portion of the HSV glycoprotein D, wherein the N terminus
of the third polypeptide segment is linked to the C terminus of the
second polypeptide segment.
2. The nucleic acid molecule of claim 1 wherein the HSV is selected
from the group consisting of HSV-1 and HSV-2.
3. The nucleic acid molecule of claim 2 wherein the first
polypeptide segment comprises: amino acids 26-265 of SEQ ID NO:27;
amino acids 26-265 of SEQ ID NO:29: amino acids 1-244 of the
glycoprotein D; amino acids 1-288 of the glycoprotein D; or amino
acids 1-294 of a mature HSV glycoprotein D with the exception that
amino acid 294 is alanine instead of tryptophan.
4. The nucleic acid molecule of claim 3 which comprises:
nucleotides 76-795 of SEQ ID NO:26; or nucleotides 350-1069 of SEQ
ID NO:28;
5-11. (canceled)
12. The nucleic acid molecule of claim 1 wherein the at least one
antigen is selected from the group consisting of: an influenza
virus antigen; a nucleoprotein P influenza virus antigen; a
Plasmodium antigen; a Plasmodium antigen selected from the group
consisting of thrombospondin-related anonymous protein (TRAP),
ring-infected erythrocyte surface antigen (RESA), merozoite surface
protein 1 (MSP1), merozoite surface protein 2 (MSP2), merozoite
surface protein 3 (MSP3), and glutamate-rich antigen (GLURP); human
papilloma virus (HPV) antigen; human papilloma virus HPV16 antigen;
HPV E5 protein; HPV E6 protein; HPV E7 protein; a human
immunodeficiency virus (HIV) antigen; and an HIV gag antigen.
13. (canceled)
14. The nucleic acid molecule of claim 1 which: encodes the amino
acid sequence encoded by SEQ ID NO:35; which comprises SEQ ID
NO:35; which comprises SEQ ID NO:31; which comprises SEQ ID NO:24;
which comprises SEQ ID NO:34.
15-20. (canceled)
21. The nucleic acid molecule of claim 1 wherein; the second
polypeptide segment comprises the E5 protein, the E6 protein, and
the E7 protein; wherein the fusion protein comprises SEQ ID NO:23;
wherein the fusion protein comprises SEQ ID NO:22; wherein the
fusion protein comprises SEQ ID NO:33.
23-30. (canceled)
31. The nucleic acid molecule of claim 1 which: is in a viral
vector; which is naked DNA; or which is in a bacterial vector.
32-33. (canceled)
34. A fusion protein encoded by the nucleic acid molecule of claim
1.
35-57. (canceled)
58. A method of inducing an immune response, comprising providing
to a subject in need thereof a fusion protein of claim 34.
59. The method of claim 59 wherein the fusion protein is provided
by administering to the subject a nucleic acid molecule which
encodes the fusion protein.
60. The method of claim 59 wherein a nucleic acid molecule of claim
1 is administered.
Description
[0001] This application claims the benefit of and incorporates by
reference Ser. No. 60/840,526 filed Aug. 28, 2006.
FIELD OF THE INVENTION
[0003] Embodiments of the present invention relate in general to
chimeric (fusion) protein constructs including a herpesvirus
glycoprotein D (gD) and a heterologous polypeptide (e.g., antigen)
that enhance the immune response against the heterologous
polypeptide (e.g., antigen) in a subject.
BACKGROUND OF THE INVENTION
[0004] gD is the receptor-binding glycoprotein of herpesviruses
(Fusco et al. (2005) Proc. Natl. Acad. Sci. U.S.A. 102:9323). The
gD ectodomain is organized in two structurally and functionally
differentiated regions. The amino-terminus includes the signal
sequence and receptor-binding sites, and the carboxy-terminus
includes the pro-fusion domain and the transmembrane domain. gD
interacts with two alternative receptors belonging to unrelated
protein families, the herpesvirus entry mediator (HVEM) and the
nectins (Geraghty et al. (1998) Science 280:1618; Montgomery et al.
(1996) Cell 87:427; Cocchi et al. (1998) J. Virol. 72:9992; Warner
et al. (1998) Virology 246:179; Lopez et al. (2000) J. Virol.
74:1267). HVEM is expressed on dendritic cells and the B and T
lymphocyte attenuator (BTLA) is expressed on activated T and B
lymphocytes. The interaction between HVEM and BTLA results in the
down-regulation of immune responses.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] FIG. 1 depicts a schematic representation of the chimeric
gene gDE7E6E5. The HPV-16 E5, E6 and E7 genes without respective
start and stop codons were linked in tandem and incorporated into
the HSV-1 gD gene ApaI site, which corresponds to amino acid 244 in
the gD mature form.
[0006] FIG. 2 depicts a schematic representation of chimeric gene
gDgag. The codon-optimized truncated form of gag from HIV-1 clade B
was fused into the HSV-1 gD gene NarI site, which corresponds to
amino acid 289 in the gD mature form.
[0007] FIGS. 3A-3B depict the gag-specific CD8.sup.+ IFN-.gamma.
response in mice immunized with vaccine constructs carrying the
gDgag chimeric gene. FIG. 3A depicts a FACS analysis of the
gag-specific CD8/IFN-.gamma..sup.+ response in peripheral blood
mononuclear cells (PBMC) from mice immunized with DNA vaccine
expressing either HIV-1 gag or HIV-1 gag fused to HSV-1 gD (gDgag).
Numbers on the right corner represent percentage
CD8.sup.+/IFN-.gamma..sup.+ cells over total of CD8.sup.+ cells.
FIG. 3B graphically depicts PBMC from mice immunized with AdC68
vectors carrying either genes encoding gag or gDgag, inoculated
with different amounts of virus particles per mouse.
[0008] FIG. 4 graphically depicts the effect of pre-existing
immunity to the AdHu5 adenovirus vector on the transgene
product-specific CD8.sup.+ T cell response to the AdC68 vector.
AdC68 vectors carrying gag, gDgag or gDE7E65 were inoculated into
naive mice and mice previously immunized with an AdHu5 expressing
an unrelated antigen (rabies glycoprotein, AdHu5rab.gp). The
percentage of reduction of CD8.sup.+ T cell response was defined as
a percentage of CD8.sup.+/IFN-.gamma..sup.+ frequency in mice
previously immunized with AdHu5 over the frequency found in mice
that did not receive AdHu5 vector.
[0009] FIG. 5 depicts the E7-specific CD8.sup.+ IFN-.gamma.
response in mice immunized with DNA vaccines expressing non-mutated
or mutated gDE7E6E5. The mutation was designed to disrupt the HVEM
binding site of gD. Mice were immunized with non-mutated gDE7E6E5
(pgDE7E6E5) or mutated gDE7E6E5 (pNBEFgDE7E6E5) and 14 days later
peripheral blood mononuclear cells were investigated by
intracellular cytokine staining for E7-specific CD8.sup.+
IFN-.gamma. responses. Numbers on the right corners represent
percentage CD8.sup.+/IFN-.gamma..sup.+ cells over total of
CD8.sup.+ cells.
[0010] FIG. 6 depicts the E7-specific CD8.sup.+ IFN-.gamma.
response in mice immunized with DNA vaccines expressing non-mutated
(gDE7) or mutated gD (SgDE7). This mutation (SgD) was designed to
increase binding between gD and HVEM. Mice were immunized with
pgDE7 or pSgDE7 and 14 days later peripheral blood mononuclear
cells were investigated by intracellular cytokine staining for
E7-specific CD8.sup.+ IFN-.gamma. response. Numbers in the corners
represent percentage CD8.sup.+/IFN-.gamma..sup.+ cells over total
of CD8.sup.+ cells.
[0011] FIG. 7 graphically depicts an in vitro HVEM binding assay.
CHO-CAR cells (Chinese hamster ovary-coxsackie-adenovirus receptor
cells) were infected with either AdC68gD or AdC68gDgag and, after
48 hours, total protein was extracted. The amount of gD in each
sample was quantified by capture ELISA and the protein extracts
were diluted in extraction buffer to normalized levels of gD.
Equalized extracts were diluted and added to 96-well plates coated
with purified HVEM. The amount of gD bound to HVEM was detected by
using anti-gD polyclonal antisera and anti-Rabbit IgG horseradish
peroxidase. Data shown is one representative experiment from two
performed.
[0012] FIGS. 8A-8B depict confocal microscopy for localization of
gDgag and HVEM on AdC68gDgag infected cells. B78H1/3E5 cells, which
expressed HVEM fused to enhanced green fluorescence protein
(HVEM-EGFP), were infected with AdC68gDgag. After 48 hours, cells
were either directly stained (FIG. 8A) or permeabilized and stained
(FIG. 8B) with an anti-gD monoclonal antibody (DL-6) and anti-mouse
IgG conjugated with Texas Red. Cells were examined with a Leica TCS
SP2 Confocal Microscope at 400.times. final magnification.
[0013] FIG. 9 graphically depicts FACS analysis of gDgag expression
on the surface of AdC68gDgag infected cells. B78H1/3E5 cells
(darker line), which express HVEM-EGFP on the surface, and B78H1
cells (lighter line), which do not express HVEM, were infected with
AdC68gDgag. Cells were cultivated for 48 hours, and then labeled
with an anti-gD monoclonal antibody (DL-6) and anti-mouse IgG
conjugated to phycoerythrin (PE). Cell suspensions were analyzed
using an EPICS XL (Beckman-Coulter, Inc., Miami, Fla.) to determine
presence of gDgag.
[0014] FIGS. 10A-10B depict that gDgag expressed by infected cells
bound to HVEM expressed on non-infected cells. Confocal microscopy
(FIG. 10A) and FACS analysis (FIG. 10B) were performed to localize
gDgag on non-infected cells. CHO-CAR cells were infected with
AdC68gDgag. After 48 hours, cells were harvested and washed
extensively with cold PBS. AdC68gDgag-infected CHO-CAR cells were
cultured with B78H1/3E5 cells, which expresses HVEM-EGFP on the
surface, at 4:1 ratio. After 48 hours, cells were stained using the
anti-gD monoclonal antibody DL-6 and anti-mouse IgG conjugated to
Texas Red (microscopy) or PE (FACS). (FIG. 10A) Microscopy was
performed with a Leica TCS SP2 Confocal Microscope at 400.times.
final magnification. (FIG. 10B) Cell suspensions were analyzed
using an EPICS XL (Beckman-Coulter, Inc., Miami, Fla.). B78H1/3E5
cells were cultured with either AdC68gDgag-infected CHO-CAR cells
(darker line) or non-infected CHO-CAR cells (lighter line). Data on
graph show cells which are positive for GFP.
[0015] FIG. 11 depicts the gag-specific CD8.sup.+ T cell response
in mice immunized with AdC68 vectors. PBMC and splenocytes from
mice immunized with 1.times.10.sup.9 vp of AdC68 vectors carrying
either gag, gDgag or gD were tested. Percentage represents
CD8.sup.+/IFN-.gamma..sup.+ cells over total of CD8.sup.+ cells.
CD8.sup.+/IFN-.gamma..sup.+ frequencies in all groups stimulated
with an unrelated control peptide were below 0.20%. Data shown are
representative of two performed experiments.
[0016] FIG. 12 graphically depicts the gag-specific IFN-.gamma.
response of CD8.sup.+ T cells from mice immunized with AdC68
vectors. PBMC are from mice immunized with different amounts of
AdC68 vectors carrying either gag, gDgag or gD. Percentage
represents CD8.sup.+/IFN-.gamma..sup.+ cells over total of
CD8.sup.+ cells. CD8.sup.+/IFN-.gamma..sup.+ frequencies in all
groups stimulated with an unrelated control peptide were 0.20%.
Data shown are representative of two performed experiments.
[0017] FIG. 13 depicts the phenotypic profile of CD8.sup.+ cells
activated by AdC68 vaccination. PBMC from naive mice and mice
immunized with AdC68 carrying either gag or gDgag were stained with
gag-tetramer-APC and anti-CD8-PerCP, in combination with
anti-CD25-PE, anti-CD-122-PE, anti-CD127-PE, anti-CD27-PE,
anti-CD62L-FITC, anti-CD69-PE, anti-CD103-PE, anti-CD43-PE,
anti-CD44-FITC, anti-CD54-PE, anti-Bcl2-PE, anti-BTLA-PE,
anti-CTLA4-PE and anti-PD1-PE. Graphs show data from
CD8.sup.+/gag-tet.sup.+ cells for AdC68gag (gray line) and
AdC68gDgag (black line), and total CD8.sup.+ for naive (black
dotted line). Data were analyzed on Flowjo software (Tree Star
Inc.).
[0018] FIG. 14. Intracellular IFN-.gamma. staining of gag-specific
and AAV-specific CD8.sup.+ T cells from mice immunized with AAV
vectors expressing gD, gag or gDgag. Detection of gag-specific and
AAV-specific CD8.sup.+ T cells was carried out after stimulation of
peripheral blood mononuclear cells (PBMCs) with either MHC class I
restricted gag peptide or AAV-capsid peptide and cell surface
staining for CD8 and intracellular staining for IFN-.gamma..
Unspecific peptide was used as control. The numbers in the right
upper corners show the frequencies of peptide-specific CD8.sup.+ T
cells, as percentages of IFN-.gamma.-producing CD8.sup.+ T cells
over all detected CD8.sup.+ T cells.
[0019] FIG. 15. Schematic representation of chimeric gene gD-NP.
Nucleoprotein P(NP) from Influenza virus A/PR8 without its start
and stop codons was incorporated into the HSV-1 gD ApaI site, which
corresponds to amino acid 244 in the mature form of gD.
[0020] FIG. 16. NP-tetramer staining of CD8.sup.+ T cells isolated
from blood of mice immunized with either pgD-NP or pNP DNA vaccine.
Mice were immunized with 100 .mu.g of each DNA vaccine vector.
Fourteen days after immunization peripheral blood mononuclear cells
(PBMCs) were isolated and cell surface stained with the NP-tetramer
and a labeled antibody to CD8. Naive mice were used as negative
control. Data represent percentages of NP-tetramer.sup.+ CD8.sup.+
T cells over all detected CD8.sup.+ T cells.
[0021] FIG. 17. Schematic representation of chimeric gene gDTRAPTB.
Thrombospondin-related anonymous protein (TRAP) from parasite
Plasmodium falciparum and Mycobacterium tuberculosis epitope string
(TB) without their start and stop codons are incorporated into the
HSV-1 gD NarI site, which corresponds to amino acid 288 in the gD
mature form.
[0022] FIGS. 18A-D. Molecular modeling of the gD-gag chimeric
protein. Ribbon representations of gD-gag in the unligated (FIGS.
18A, 18B) and HVEM ligated (FIGS. 18C, 18D) conformations. FIG.
18A, the gag insertion is connected to the gD ectodomain core by a
long flexible linker. FIG. 18B, a superposition of the native gD
X-ray structure (2C36) (darker ribbon) and that of the gD-gag
chimera model (lighter ribbon) shows that the gag insert
repositions the C-terminus of native gD away from the HVEM binding
pocket. The dashed line indicates an 11 residue gD loop segment
that like the first 22 N-terminal residues (not shown) is
unresolved in the X-ray structure and presumed to be highly
flexible (Krummenacher et al., EMBO J. 24, 4144-53, 2005). FIG.
18C, gD-gag chimera model in the HVEM ligated conformation with
HVEM positioned as observed in the gD-HVEM complex X-ray structure
(1JMA). The gD N-terminus changes conformation upon formation of
the HVEM complex. FIG. 18D, a superposition of the native gD X-ray
structure (2C36) (darker ribbon) with the gD-gag chimera model
(lighter ribbon) in the HVEM-bound conformation shows that the gag
insert does not disrupt the gD core domain.
[0023] FIG. 19. Confocal microscopy was carried out with B78-H1/3E5
cells, which express HVEM fused to Enhanced Green Fluorescence
Protein (HVEM-EGFP). B78-H1/3E5 cells were infected with AdC68gag,
AdC68gD or AdC68gD-gag, then stained anti-gD DL-6 MAb and
anti-mouse IgG conjugated with Texas Red. AdC68gD-gag-infected
cells were permeabilized then stained as above. Cells were examined
with a Leica TCS SP2 Confocal Microscope at 400.times. final
magnification.
[0024] FIG. 20. Comparison of gD expression on the surface of
B78-H1 (black line) and B78-H1/3E5 (gray) cells infected with AdC68
vectors carrying gD-gag, gD or gag.
[0025] FIG. 21. Presence of gD on the surface of non-infected
HVEM.sup.+ cells co-cultivated with HVEM.sup.- cells infected with
either AdC68gD-gag, AdC68gD or AdC68gag. Non-infected cells were
used as negative control.
[0026] FIG. 22. AdC68gD induces enhanced expansion of CD8.sup.+ T
cells in vitro. Irradiated lymph nodes cells from naive mice and
mice immunized with either AdC68E7E6E5 or AdC68gD were incubated
with CFSE-labeled CD8.sup.+ OT-1 (V.alpha.2.sup.+) cells for 72
hrs. Total live cells (left) were analyzed for expression of
CD8.sup.+ V.alpha.2.sup.+. CSFE expression by these double positive
populations (highlighted by the squares on the right graphs) is
shown on the left graphs. The bars and numbers show from right to
left the percentages of the population that underwent no
replication, 1, 2, 3 or .ltoreq.4 cycles of replication. Graphs
show data from one representative experiment of two performed.
[0027] FIGS. 23A-C. CD8.sup.+ T cell responses to vectors
expressing antigens fused to gD. FIG. 23A, intracellular cytokine
staining of E7- and gag-specific CD8.sup.+ T cells were carried out
on PBMCs from mice i.m. immunized with DNA vaccines (upper graphs)
or AdC68 vectors (lower graphs) expressing either gD, E7E6E5,
gD-E7E6E5, gag or gD-gag, after stimulation with E7 or gag peptide
and cell surface staining for CD8 (FITC) and intracellular staining
for IFN-.gamma. (PE). PBMCs were isolated from animals 14 days
after DNA vaccination or 10 days after application of AdC68 vector.
The numbers in the right upper corners show frequencies of
IFN-.gamma.-producing CD8.sup.+ T cells as a percentage of all
CD8.sup.+ T cells. Frequencies of IFN-.gamma..sup.+/CD8.sup.+ T
cells stimulated with an unrelated control peptide were below 0.2%
in all groups. FIG. 23B, Gag-specific CD8.sup.+ T cell frequencies
were determined 10 days after immunization of mice with decreasing
doses of either AdC68gag (open bars) or AdC68gD-gag (black bars)
vectors. FIG. 23C, The kinetics of E7-specific CD8.sup.+ T cell
responses induced by the AdC68gD-E7E6E5 vector were analyzed from
BPMCs of mice immunized with either AdC68E7E6E5 (squares), AdC68gD
(diamonds) or AdC68gD-E7E6E5 (triangles) vectors at different days
after a single dose of 10.sup.10 vps of the vaccines.
[0028] FIGS. 24A-B. The enhancement of CD8.sup.+ T cell responses
requires binding of gD to HVEM. FIG. 24A, E7-specific
IFN-.gamma..sup.+CD8.sup.+ responses were evaluated with
splenocytes from mice immunized with one dose of DNA vaccines
expressing the E7E6E5 polypeptide either within wild-type gD
(pgD-E7E6E5), a mutated gD that shows loss of binding to HVEM
(NBEFgD-E7E6E5) or that shows enhanced binding to HVEM
(SgD-E7E6E5). FIG. 24B, splenocytes from mice immunized with one
dose of DNA vaccines carrying E7 fused to either wild type gD
(gD-E7) or mutated gD with high affinity to HVEM (SgD-E7) were
evaluated for E7-specific IFN-.gamma..sup.+CD8.sup.+ response.
PBMCs were isolated 14 days after DNA vaccine immunizations.
[0029] FIG. 25. Phenotypes of gag-specific CD8.sup.+ T cells were
analyzed on PBMCs from mice immunized with either AdC68gD-gag or
AdC68gag. PBMCs were isolated 10 days after immunization. Naive
mice were used as controls (black dotted line). The graphs shown
reflect expression levels of total CD8.sup.+ T cells from naive
mice (black dotted line) and gag-tet.sup.+CD8.sup.+ T cells from
mice immunized with either AdC68gag (grey line) or AdC68gD-gag
(black line).
[0030] FIGS. 26A-C. CD8.sup.+ T cells induced by gD-antigen
chimeric protein are functional in vivo. Protection against TC-1
tumor challenge was evaluated in mice vaccinated with DNA (FIG.
26A) or AdC68vectors (FIG. 26B) expressing either gD (circles),
E7E6E5 (diamonds) or gD-E7E6E5 (squares). FIG. 26C, Protection to
TC-1 tumor challenge in mice vaccinated with DNA vaccine expressing
either NBEFgD-E7E6E5 (diamonds), SgD-E7E6E5 (squares), gD-E7
(circles) or SgD-E7 (triangles) chimeric genes. Mice were
challenged 14 and 10 days after vaccination with DNA and AdC68
vectors, respectively. Tumor development was followed for up to 60
days after challenge.
[0031] FIG. 27A-B. Quantification of specific mRNA copies and
protein expression by cells infected in vitro with AdC68 vectors.
FIG. 27A, RNA isolated from non-infected cells and from cells
infected with AdC68gD (white bars), AdC68E7E6E5 (gray bars) or
AdC68gD-E7E6E5 (black bars) were reverse transcribed and quantified
by Real-Time PCR. After quantification of GAPDH mRNA copies, all
samples were normalized to 10.sup.9 GAPDH mRNA copies. Specific
mRNA copies were quantified using gD, E7, E6, and E5 specific
primers Neither E7, E6 nor E5 mRNA were detected in cells infected
with AdC68gD, and no gD specific mRNA was detected in cells
infected with AdC68E7E6E5. mRNA levels were assessed in three
independent experiments and each sample was investigated in
triplicates. p values from two-tail student's t test are shown on
top of the bars. FIG. 27B, confocal microscopy was carried out with
CHO/CAR cells infected with AdC68 expressing either gD, E7E6E5 or
gD-E7E6E5, then permeabilized and stained with anti-gD DL-6 MAb and
anti-mouse IgG conjugated with FITC. Immunofluorescence is shown on
the top panel while differential interference contrast (DIC)
microscopy is shown on the bottom panel. Cells were examined with a
Leica TCS SP2 Confocal Microscope at 400.times. magnification.
[0032] FIG. 28A-C. Intracellular IFN-.gamma. staining of
E7-specific CD8.sup.+ T cells from mice immunized with AdC68 and
DNA vectors. FIG. 28A, frequencies of E7-specific CD8.sup.+ T cells
in PBMC (top) or spleens (bottom) from naive mice or mice immunized
with AdC68 vector expressing either gD, E7E6E5 or gD-E7E6E5 were
determined 10 days after immunization. FIG. 28B, frequencies of
E7-specific CD8.sup.+ T cells in PBMC (top) or spleens (bottom)
from naive mice or mice immunized with DNA vaccines expressing
either gD, E7E6E5 or gD-E7E6E5 were determined 14 days after
immunization. FIG. 28C, prime and boost regimens with pgD-E7E6E5
and AdC68gD-E7E6E5 vectors. Mice immunized with one dose of
pgD-E7E6E5 vector were boosted after 90 days with AdC68gD-E7E6E5
(open bars), while mice immunized with AdC68gD-E7E6E5 were boosted
after 90 days with pgD-E7E6E5 (black bars). Detection of
E7-specific CD8.sup.+ T response was carried out after stimulation
with a MHC class I restricted E7 peptide and cell surface staining
for CD8 (FITC) and intracellular staining for IFN-.gamma. (PE). The
numbers in the right upper corners show the frequencies of
E7-specific CD8.sup.+ T cells, as percentages of
IFN-.gamma.-producing CD8.sup.+ T cells over all detected CD8.sup.+
T cells. IFN-.gamma.-producing CD8.sup.+ cell frequencies in all
groups stimulated with an unrelated peptide or in the absence of
stimulus were below 0.2%. The data shown in a and b are from one
representative experiment of four performed.
[0033] FIG. 29. Dose-response of the CD8.sup.+ T cell response to
AdC68gD-E7E6E5. Frequencies of IFN-.gamma.-producing E7-specific
CD8.sup.+ T cells in spleens and PBMCs induced by 5.times.10.sup.10
to 1.times.10.sup.8 vp/animal of AdC68gD-E7E6E5 vector were
determined as described on legend to FIG. 28.
[0034] FIG. 30A-B. Anti-tumor effects of AdC68 vectors against TC-1
cell challenge. FIG. 30A, for post-challenge vaccination, groups of
10 mice were s.c. inoculated with TC-1, then 5 days later immunized
with either AdC68gD (triangles), AdC68E7E6E5 (circles) or
AdC68gD-E7E6E5 (squares). FIG. 30B, for pre-challenge vaccination,
groups of 10 mice vaccinated one year earlier with AdC68 vectors
carrying either gD (triangles), E7E6E5 (circles) or gD-E7E6E5
(squares) were s.c. challenged with TC-1. For all TC-1 challenge
experiments animals were monitored 3 times per week for evidence of
tumor growth over a period of 60 days.
[0035] FIG. 31A-B. CD8.sup.+ T cell response after challenge with
TC-1 in mice vaccinated one year earlier. One year after
vaccination with AdC68 vectors expressing either gD, E7E6E5 or
gD-E7E6E5, mice were challenged with TC-1 cells and 10 days later
E7-specific frequencies of E7-specific CD8.sup.+ T cells were
determined. FIG. 31A, ICS of E7-specific CD8.sup.+ T cells in
spleen from non-challenged mice (top) or mice challenged with TC-1
cells (top). Frequencies of IFN-.gamma.-producing E7-specific
CD8.sup.+ T cells in spleen were determined as in FIG. 2 legend.
FIG. 31B, E7-tetramer staining of CD8.sup.+ T cells isolated from
spleen, blood and liver of mice challenged (white bars) or not
(black bars) with TC-1 cells. Data represent percentages of
E7-tetramer.sup.+CD8.sup.+ T cells over all detected CD8.sup.+ T
cells. E7-tetramer.sup.+CD8.sup.+ cells were not detected in mice
immunized with either AdC68gD or AdC68E7E6E5.
[0036] FIG. 32A-C. CD8.sup.+ T cell response and phenotypic profile
in mice immunized with AdC68 vectors and subsequently challenged
with TC-1 cells. Lymphocytes were isolated 3 days after TC-1
challenge from animals immunized with AdC68gD-E7E6E5 and 7 days
after challenge from animals immunized with either AdC68gD or
AdC68E7E6E5. E7-specific CD8.sup.+ T response were determined in
spleen, PBMC and TIL by ICS (FIG. 32A) and E7-tetramer staining
(FIG. 32B). ICS data was determined as in FIG. 2 legend, while
E7-tetramer staining data represent percentages of
E7-tetramer.sup.+CD8.sup.+ T cells over all detected CD8.sup.+ T
cells. E7-specific IFN-.gamma..sup.+CD8.sup.+ cells and
E7-tetramer.sup.+CD8.sup.+ cells were not detected in mice
immunized with either AdC68gD or AdC68E7E6E5. FIG. 32C, phenotype
analysis of splenocytes, PBMCs and TILs were determined with cells
isolated from mice immunized with AdC68gD-E7E6E5 (black line) or
AdC68gD (dotted black line) then challenged with TC-1. Cells were
stained with E7-tetramer-APC and anti-CD8-PerCP, in combination
with antibodies to CD44, CD62L, CD27, Bcl2, BTLA, CTLA-4 and PD-1.
CD8.sup.+ T cells isolated from either naive mice or mice immunized
with AdC68E7E6E5 showed similar phenotype profiles as CD8.sup.+ T
cells isolated from mice immunized with AdC68gD.
[0037] FIG. 33A-C. Comparison of CD8.sup.+ T cell responses and
phenotype profiles induced by AdC68 vectors in wild-type and HPV-16
E6/E7-tg mice. One-year old E6/E7-tg mice were vaccinated with
AdC68 vectors expressing either gD, E7E6E5 or gD-E7E6E5, and 1-year
old C57Bl/6 mice were vaccinated with AdC68gD-E7E6E5 vector. Ten
days later frequencies and phenotypes of E7-specific CD8.sup.+ T
cells were determined. FIG. 33A, E7-specific CD8.sup.+ T cells
isolated from spleens of E6/E7-tg mice immunized with AdC68gD,
AdC68E7E6E5 or AdC68gD-E7E6E5, or from spleen of wild-type mice
immunized with AdC68gD-E7E6E5 were tested by ICS. Frequencies of
IFN-.gamma.-producing E7-specific CD8.sup.+ T cells in spleen were
determined as described in legend to FIG. 2. FIG. 33B, E7-tetramer
staining of CD8.sup.+ T cells was performed with splenocytes and
PBMC from wild-type and E6/E7-tg mice, and with lymphocytes from
thyroids of E6/E7-tg mice. Data show percentages of
E7-tetramer.sup.+CD8.sup.+ T cells over all detected CD8.sup.+ T
cells. ND, not determined. FIG. 33C, phenotypic profile of
E7-specific CD8.sup.+ T cells were determined using cells isolated
from spleen and blood of AdC68gD-E7E6E5 vaccinated E6/E7 tg (filled
gray) and wild-type (black line) mice, and from cells isolated from
thyroid of E6/E7 tg mice vaccinated with AdC68gD-E7E6E5. CD8.sup.+
T cells isolated from E6/E7 tg naive mice were used as controls
(black dotted line).
DETAILED DESCRIPTION
[0038] The invention provides chimeric, or fusion, proteins in
which one or more antigens is inserted into the C terminal region
of a mature HSV gD protein. Such fusion proteins enhance the immune
response of a host against the antigen(s) to a much greater degree
than is observed without the gD. The gD chimeric proteins of the
present invention are particularly suitable for use as genetic
vaccines (e.g., DNA vaccines or viral vector vaccines) to
therapeutically or prophylactically treat a subject. Thus, the
invention also provides nucleic acid molecules which encode fusion
proteins of the invention.
[0039] Glycoprotein D
[0040] Glycoprotein D (gD) is an envelope glycoprotein found on
Herpes simplex viruses such as HSV-1 or HSV-2 and is expressed in
cells infected by the viruses. An HSV gD has a 25-amino acid
amino-terminal signal sequence and a carboxy-terminal transmembrane
domain. The signal sequence is typically cleaved in the mature form
of the protein. The amino acid sequence of HSV-1 gD is shown in SEQ
ID NO:27 (amino acids 1-25 are the signal sequence; amino acids
26-394 are mature HSV-1 gD); a coding sequence for SEQ ID NO:27 is
shown in SEQ ID NO:26. The amino acid sequence of HSV-2 gD is shown
in SEQ ID NO:29 (amino acids 1-25 are the signal sequence; amino
acids 26-393 are mature HSV-2 gD); a coding sequence for SEQ ID
NO:25 is shown in SEQ ID NO:28.
[0041] An HSV gD or mutant thereof which is useful in the present
invention has the ability to interact with HVEM and, in addition,
may have one or more of the following properties: 1) ability to
stimulate a CD8.sup.+ T cell response to the fusion partner; 2)
ability to disrupt an HVEM-BTLA pathway activity; 3) ability to
interact with nectin-1; 4) ability to mediate cell entry by an
HSV-1 and/or HSV-2 virus; and 5) ability to mediate cell-to-cell
spread of HSV-1 and/or HSV-2. Thus, as used herein, a "gD" or an
"immunostimulatory portion of a gD" refers to a polypeptide having
an amino acid sequence of a wild-type gD or a mutant thereof which
retains one or more gD activities.
[0042] gD chimeric (fusion) proteins of the invention comprise at
least two, preferably three polypeptide segments. The first
polypeptide segment comprises at least amino acids 1-240 of a
mature Herpes simplex virus (HSV) glycoprotein D; in preferred
embodiments the first polypeptide segment does not comprise a full
length mature glycoprotein D; in this case a third polypeptide
segment is included. The second polypeptide segment, the N terminus
of which is linked to the C terminus of the first polypeptide
segment, comprises at least one antigen which is not an HSV
glycoprotein D antigen. The third polypeptide comprises a C
terminal portion of the HSV glycoprotein D; the N terminus of the
third polypeptide segment is linked to the C terminus of the second
polypeptide segment. Thus, in certain embodiments an antigen is
fused to the carboxy-terminal region of gD. In other aspects, an
antigen is inserted within the carboxy-terminal amino acid sequence
of gD such that the amino-terminal end of the gD chimeric protein
is an amino-terminal gD amino acid sequence, fused to an internal
antigenic sequence, fused to a carboxy-terminal amino acid sequence
of gD.
[0043] In certain embodiments, the first polypeptide segment of a
gD chimeric protein of the present invention includes the entire gD
amino acid sequence (e.g., amino acids 1-394) or the mature gD
amino acid sequence (e.g., amino acids 26-394, the carboxy-terminal
369 amino acids). In other embodiments, the first polypeptide
segment includes less than full-length mature gD but includes 250,
260, 270, 280, 290, 300, 305, 310, 315, 320, 325, 330, 335, 340,
345, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 360,
361, 362, 363, 362, 365, 366, 367 or 368 amino acids of the mature
gD sequence.
[0044] In certain aspects, an antigenic amino acid sequence is
inserted within a region of a gD that is between amino acids 230
and 300, between amino acids 235 and 295, or between amino acids
240 and 290 of a mature gD amino acid sequence. In other aspects an
antigenic amino acid sequence is inserted at a position
carboxy-terminal to amino acid 230, 235, 240, 245, 250, 255, 260,
265, 270, 275, 280, 285 of a mature gD amino acid sequence. In
certain aspects, an antigenic amino acid sequence is inserted
immediately adjacent to amino acid 240, 241, 242, 243, 244, 245,
246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258,
259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271,
272, 273, 274, 275, 276, 277, 278, 279, 280, 282, 282, 283, 284,
285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297,
298, 299, or 300 of a mature gD amino acid sequence
[0045] In certain embodiments, a chimeric gD protein of the
invention has a structure that is similar to the structure of the
wild-type protein, that is, the chimeric gD protein has the ability
to interact with HVEM and, in addition, may have one or more of the
following activities: 1) stimulating a CD8.sup.+ T cell response to
the fusion partner; 2) disrupting an HVEM-BTLA pathway activity; 3)
interacting with nectin-1; 4) mediating cell entry by an HSV-1
and/or HSV-2 virus; and/or 5) mediating cell-to-cell spread of
HSV-1 and/or HSV-2.
[0046] Antigens
[0047] As used herein, the term "antigen" (also termed "fusion
partner" in relation to gD) is intended to include, but is not
limited to, a substance that an immune response is specifically
mounted against, such as a protein or a polypeptide. An antigen of
the invention can be of any length, ranging in size from a few
amino acids in length to hundreds of amino acids in length,
provided that that the chimeric gD maintains a structure that is
similar to that of the wild-type gD, e.g., the chimeric gD retains
one or more activities of the wild-type gD, particularly the
activities of interacting with HVEM and/or stimulating a CD8.sup.+
T cell response to the fusion partner in the host. In certain
aspects of the invention, the antigen is 1000, 900, 800, 700, 600,
500, 400, 350, 340, 330, 320, 310, 300, 290, 280, 270, 260, 250,
240, 230, 220, 210, 200, 190, 180, 170, 160, 150, 140, 130, 120,
110, 100, 90, 80, 70, 60, 50, 40, 30, 20, 10 or less amino acids in
length.
[0048] An antigen of the present invention includes a heterologous
protein and/or polypeptide, such as a viral, bacterial, fungal, or
parasite protein or polypeptide, and/or a host polypeptide and/or
protein e.g., a tumor cell polypeptide or protein (such as an
oncoprotein or a portion thereof) or a polypeptide or protein
associated with inflammation. Antigens of particular interest
include, but are not limited to, influenza virus antigens, such as
nucleoprotein P(NP; see FIG. 16), matrixprotein (M), and
hemagglutinin (HA); Plasmodium antigens such as
thrombospondin-related anonymous protein (TRAP; see FIG. 17),
ring-infected erythrocyte surface antigen (RESA), merozoite surface
protein 1 (MSP1), merozoite surface protein 2 (MSP2), merozoite
surface protein 3 (MSP3), and glutamate-rich antigen (GLURP); human
papilloma virus (HPV) antigens, particularly HPV-16 antigens, such
as E5 protein, E6 protein, and E7 protein; and HV antigens, such as
gag, pol, nef, tet, and env.
[0049] Viruses include DNA or RNA animal virus. As used herein, RNA
viruses include, but are not limited to, virus families such as
picornaviridae (e.g., polioviruses), reoviridae (e.g.,
rotaviruses), togaviridae (e.g., encephalitis viruses, yellow fever
virus, rubella virus), orthomyxoviridae (e.g., influenza viruses),
paramyxoviridae (e.g., respiratory syncytial virus (RSV), measles
virus (MV), mumps virus (MuV), parainfluenza virus (PIV)),
rhabdoviridae (e.g., rabies virus (RV)), coronaviridae,
bunyaviridae, flaviviridae (e.g., hepatitis C virus (HCV)),
filoviridae, arenaviridae, bunyaviridae, and retroviridae (e.g.,
human T-cell lymphotropic viruses (HTLV), human immunodeficiency
viruses (HIV)). As used herein, DNA viruses include, but are not
limited to, virus families such as papovaviridae (e.g., papilloma
viruses), adenoviridae (e.g., adenovirus), herpesviridae (e.g.,
herpes simplex viruses, e.g., HSV-1, HSV-2; varicella zoster virus
(VZV); Epstein-Barr virus (EBV); cytomegalovirus (CMV); human
herpesviruses, e.g., HHV-6 and HHV-7; Kaposi's sarcoma-associated
herpesvirus (KSHV) and the like), and poxyiridae (e.g., variola
viruses). These and other viruses and viral proteins are included
in the present invention and are described further in Knipe et al.,
Field's Virology, 4.sup.th ed., Lippincott Williams & Wilkins,
2001, incorporated herein by reference in its entirety for all
purposes.
[0050] Bacteria include, but are not limited to, gram positive
bacteria, gram negative bacteria, acid-fast bacteria and the like.
As used herein, gram positive bacteria include, but are not limited
to, Actinomedurae, Actinomyces israelii, Bacillus anthracis,
Bacillus cereus, Clostridium botulinum, Clostridium difficile,
Clostridium perfringens, Clostridium tetani, Corynebacterium,
Enterococcus faecalis, Listeria monocytogenes, Nocardia,
Propionibacterium acnes, Staphylococcus aureus, Staphylococcus
epiderm, Streptococcus mutans, Streptococcus pneumoniae and the
like. As used herein, gram negative bacteria include, but are not
limited to, Afipia felis, Bacteriodes, Bartonella bacilliformis,
Bortadella pertussis, Borrelia burgdorferi, Borrelia recurrentis,
Brucella, Calymmatobacterium granulomatis, Campylobacter,
Escherichia coli, Francisella tularensis, Gardnerella vaginalis,
Haemophilus aegyptius, Haemophilus ducreyi, Haemophilus
influenziae, Heliobacter pylori, Legionella pneumophila, Leptospira
interrogans, Neisseria meningitidia, Porphyromonas gingivalis,
Providencia sturti, Pseudomonas aeruginosa, Salmonella enteridis,
Salmonella typhi, Serratia marcescens, Shigella boydii,
Streptobacillus moniliformis, Streptococcus pyogenes, Treponema
pallidum, Vibrio cholerae, Yersinia enterocolitica, Yersinia pestis
and the like. As used herein, acid-fast bacteria include, but are
not limited to, Myobacterium avium, Myobacterium leprae,
Myobacterium tuberculosis and the like.
[0051] Other bacteria not falling into the other three categories
include, but are not limited to, Bartonella henseiae, Chlamydia
psittaci, Chlamydia trachomatis, Coxiella burnetii, Mycoplasma
pneumoniae, Rickettsia akari, Rickettsia prowazekii, Rickettsia
rickettsii, Rickettsia tsutsugamushi, Rickettsia typhi, Ureaplasma
urealyticum, Diplococcus pneumoniae, Ehrlichia chafensis,
Enterococcus faecium, Meningococci and the like.
[0052] Fungi include, but are not limited to, Aspergilli, Candidae,
Candida albicans, Coccidioides immitis, Cryptococci, and
combinations thereof.
[0053] Parasites include, but are not limited to, Balantidium coli,
Cryptosporidium parvum, Cyclospora cayatanensis, Encephalitozoa,
Entamoeba histolytica, Enterocytozoon bieneusi, Giardia lamblia,
Leishmaniae, Plasmodii, Toxoplasma gondii, Trypanosomae,
trapezoidal amoeba and the like.
[0054] Oncoproteins are intended, without limitation, to refer to
proteins and/or peptides that are capable of inducing cell
transformation. Oncoproteins include, but are not limited to,
cellular proteins such as PDGF, ERB-B, ERB-B2, K-RAS, N-RAS, C-MYC,
N-MYC, L-MYC, BCL-2, BCL-1, MDM2 and the like. Oncoproteins also
include, but are not limited to, viral proteins from RNA and/or DNA
tumor viruses such as hepatitis B viruses, SV40 viruses,
polyomaviruses, adenoviruses, herpes viruses, retroviruses and the
like. Tumor suppressor proteins are intended, without limitation,
to refer to proteins or polypeptides that can suppress or block
aberrant cellular proliferation, as well as tumor suppressor
proteins that have been mutated and, accordingly, no longer
suppress or block aberrant cellular proliferation. Tumor suppressor
proteins include, but are not limited to, cellular proteins such as
APC, DPC4, NF-1, NF-2, MTS1, RB, p53 and the like.
[0055] gD chimeric proteins of the present invention are useful for
modulating disorders associated with aberrant cellular
proliferation mediated by oncoproteins and/or tumor suppressor
proteins, such as cancer. Aberrant cellular proliferation is
intended to include, but is not limited to, inhibition of
proliferation including rapid proliferation. As used herein, the
term "disorder associated with aberrant cellular proliferation"
includes, but is not limited to, disorders characterized by
undesirable or inappropriate proliferation of one or more subset(s)
of cells in a multicellular organism. The term "cancer" refers to
various types of malignant neoplasms, most of which can invade
surrounding tissues, and may metastasize to different sites (PDR
Medical Dictionary 1st edition (1995)). The terms "neoplasm" and
"tumor" refer to an abnormal tissue that grows by cellular
proliferation more rapidly than normal and continues to grow after
the stimuli that initiated proliferation is removed (PDR Medical
Dictionary 1st edition (1995)). Such abnormal tissue shows partial
or complete lack of structural organization and functional
coordination with the normal tissue which may be either benign
(benign tumor) or malignant (malignant tumor).
[0056] Polypeptides and proteins associated with inflammation
include those that modulate a disease or disorder characterized by,
caused by, resulting from, or becoming affected by inflammation.
Examples of inflammatory diseases or disorders include, but not
limited to, acute and chronic inflammation disorders such as
asthma, psoriasis, rheumatoid arthritis, osteoarthritis, psoriatic
arthritis, inflammatory bowel disease (Crohn's disease, ulcerative
colitis), sepsis, vasculitis, and bursitis; autoimmune diseases
such as lupus, polymyalgia, rheumatica, scleroderma, Wegener's
granulomatosis, temporal arteritis, cryoglobulinemia, and multiple
sclerosis; transplant rejection; reperfusion injury in strokes or
myocardial infarction; osteoporosis; cancer, including solid tumors
(e.g., lung, CNS, colon, kidney, and pancreas); Alzheimer's
disease; atherosclerosis; viral (e.g., HIV or influenza)
infections; chronic viral (e.g., Epstein-Barr, cytomegalovirus,
herpes simplex virus) infection; and ataxia telangiectasia.
[0057] Nucleic Acid Molecules
[0058] The invention also provides nucleic acid molecules which
encode fusion proteins of the invention. In certain embodiments of
the invention, the nucleic acid molecule is a vector. As used
herein, the term "vector" refers to a nucleic acid molecule, a
protein, or a liquid structure capable of transporting another
nucleic acid. One type of vector is a "plasmid," which refers to a
circular double stranded DNA loop into which additional DNA
segments can be ligated.
[0059] Another type of vector is a viral vector, wherein additional
DNA segments can be ligated into the viral genome. Certain vectors
are capable of autonomous replication in a host cell into which
they are introduced (e.g., bacterial vectors having a bacterial
origin of replication and episomal mammalian vectors). Other
vectors are replication-defective and remain in the nucleus as
episomes. Other vectors (e.g., non-episomal mammalian vectors) are
integrated into the genome of a host cell upon introduction into
the host cell, and thereby are replicated along with the host
genome. Moreover, certain vectors are capable of directing the
expression of genes to which they are operatively linked. Such
vectors are referred to herein as "expression vectors." In general,
expression vectors of utility in recombinant DNA techniques are
often in the form of plasmids. The terms "plasmid" and "vector" can
be used interchangeably as the plasmid is a commonly used form of
vector.
[0060] In one embodiment, a recombinant virus is provided for
eliciting an immune response in a host infected by the virus. In
certain aspects, the recombinant virus is replication-incompetent.
A recombinant virus may be constructed from any virus using methods
known in the art, provided that the native progenitor is rendered
replication incompetent. For example, replication-incompetent
adenovirus, adeno-associated virus, SV40 virus, retrovirus, herpes
simplex virus or vaccinia virus may be used to generate the
recombinant virus by inserting the viral antigen into a region that
is non-essential to the infectivity of the recombinant virus. A
recombinant virus does not have the pathologic regions of the
native progenitor of the benign virus but retains its infectivity
to the host.
[0061] In a certain embodiment, the recombinant virus is a
replication-incompetent chimpanzee-derived adenovirus.
Chimpanzee-derived adenovirus vectors have distinct advantages over
previously used adenoviral recombinants of the human serotype 5
that is typically used in the art. Most importantly, the efficacy
of simian adenoviral vaccine carriers is not impaired by
pre-existing neutralizing antibodies to human adenovirus serotype 5
that can be detected in up to 45% of the adult human population in
the United States. Furthermore, simian adenoviral recombinants have
interactions with cells of the innate immune system, most notably
dendritic cells, which sponsor development of strongly biased Th1
responses suited to induce potent responses of CD8.sup.+ T cells, a
subset of immunocytes that is particularly important to control the
spread of HIV-1. For a review of replication-incompetent
chimpanzee-derived adenovirus, see U.S. Pat. No. 6,019,978,
incorporated herein by reference in its entirety for all
purposes.
[0062] A number of viral vectors suitable for in vivo expression of
the gD chimeric proteins described herein are known. Such vectors
include retroviral vectors (see, e.g., Miller (1992) Curr. Top.
Microbiol. Immunol. 158:1; Salmons and Gunzburg (1993) Human Gene
Therapy 4:129; Miller et al. (1994) Meth. Enz. 217:581) and
adeno-associated vectors (reviewed in Carter (1992) Curr. Opinion
Biotech. 3:533; Muzcyzka (1992) Curr. Top. Microbiol. Immunol.
158:97). Other viral vectors that are used include adenoviral
vectors, alphavirus replicons, herpes virus vectors, pox virus
vectors, and rhabdovirus vectors, as generally described in, e.g.,
Jolly (1994) Cancer Gene Therapy 1:51; Latchman (1994) Molec.
Biotechnol. 2:179; Johanning et al. (1995) Nucl. Acids Res.
23:1495; Berencsi et al. (2001) J. Infect. Dis. 183:1171;
Rosenwirth et al. (2001) Vaccine Feb. 19:1661; Kittlesen et al.
(2000) J. Immunol. 164:4204; Brown et al. (2000) Gene Ther. 7:1680;
Kanesa-thasan et al. (2000) Vaccine 19:483; and Sten (2000) Drug
60:249. Compositions comprising vectors and an acceptable excipient
are provided herein.
[0063] Nucleic Acid and Protein Variants
[0064] In certain aspects, gD nucleic acid molecules and
polypeptides are "naturally occurring." As used herein, a
"naturally-occurring" molecule refers to a gD molecule having a
nucleotide sequence that occurs in nature (e.g., encodes a gD
polypeptide sequence found in a herpes simplex virus, e.g., HSV-1
or HSV-2). In addition, naturally or non-naturally occurring
variants of these polypeptides and nucleic acid molecules which
retain the same functional activity, e.g., the ability to bind HVEM
and/or stimulate an immune response to a fusion partner in a host.
Such variants can be made, e.g., by mutation using techniques that
are known in the art. Alternatively, variants can be chemically
synthesized.
[0065] As used herein, the term "variant" is intended to include,
but is not limited to, nucleic acid molecules or polypeptides that
differ in sequence from a reference nucleic acid molecule or
polypeptide, but retains its essential properties, that is, it
retains the ability to interact with HVEM and, in addition, it may
have one or more of the following activities: 1) stimulating a
CD8.sup.+ T cell response to a fusion partner 2) disrupting an
HVEM-BTLA pathway activity; 3) interacting with nectin-1; 4)
mediating cell entry by an HSV-1 and/or HSV-2 virus; and/or 5)
mediating cell-to-cell spread of HSV-1 and/or HSV-2. Changes in the
nucleotide sequence of the variant may or may not alter the amino
acid sequence of a polypeptide encoded by the reference nucleic
acid molecule. Nucleotide changes may result in amino acid
substitutions, additions, deletions, fusions and truncations in the
polypeptide encoded by the reference sequence.
[0066] Variants can be made using mutagenesis techniques that are
known in the art. Alternatively, variants can be chemically
synthesized. Mutations can include one or more point mutations,
deletions and/or insertions. In certain aspects of the invention, a
mutant gD chimeric polypeptide has the ability to bind HVEM at a
level that is the same as or greater than the ability of a
wild-type gD protein to bind HVEM. In certain aspects of the
invention, amino acid W 294 of the mature gD sequence is mutated to
alanine.
[0067] Construction of Fusion Proteins
[0068] Fusion proteins of the invention typically are prepared
recombinantly, as described in Example 1. Many kits for
constructing fusion proteins are available from companies such as
Promega Corporation (Madison, Wis.), Stratagene (La Jolla, Calif.),
CLONTECH (Mountain View, Calif.), Santa Cruz Biotechnology (Santa
Cruz, Calif.), MBL International Corporation (MIC; Watertown,
Mass.), and Quantum Biotechnologies (Montreal, Canada;
1-888-DNA-KITS). Alternatively, a fusion protein can be synthesized
chemically, for example, using solid phase techniques. See, e.g.,
Merrifield, J. Am. Chem. Soc. 85, 2149 54, 1963; Roberge et al.,
Science 269, 202 04, 1995. Protein synthesis can be performed using
manual techniques or by automation. Automated synthesis can be
achieved, for example, using Applied Biosystems 431A Peptide
Synthesizer (Perkin Elmer). Optionally, fragments of a fusion
protein can be separately synthesized and combined using chemical
methods to produce a full-length molecule.
[0069] Methods of Using Fusion Proteins and Nucleic Acids of the
Invention
[0070] Pharmaceutical Compositions
[0071] Dosage Regimens
[0072] Certain embodiments of the invention are directed to
prophylactically treating an individual in need thereof. As used
herein, the term "prophylactic treatment" includes, but is not
limited to, the administration of a nucleic acid sequence encoding
a gD chimeric protein to a subject who does not display signs or
symptoms of a disease, pathology, or medical disorder, or displays
only early signs or symptoms of a disease, pathology, or disorder,
such that treatment is administered for the purpose of diminishing,
preventing, or decreasing the risk of developing the disease,
pathology, or medical disorder. A prophylactic treatment functions
as a preventative treatment against a disease or disorder.
[0073] Certain embodiments of the invention are directed to
therapeutically treating an individual in need thereof. As used
herein, the term "therapeutically" includes, but is not limited to,
the administration of a nucleic acid sequence encoding a gD
chimeric protein to a subject who displays symptoms or signs of
pathology, disease, or disorder, in which treatment is administered
to the subject for the purpose of diminishing or eliminating those
signs or symptoms of pathology, disease, or disorder.
[0074] Embodiments of the present invention are directed to
compositions and methods for enhancing the immune response of a
subject to one or more antigens. As used herein, the terms
"subject" and "host" are intended to include living organisms such
as mammals. Examples of subjects or hosts include, but are not
limited to, horses, cows, sheep, pigs, goats, dogs, cats, rabbits,
guinea pigs, rats, mice, gerbils, non-human primates, humans and
the like, non-mammals, including, e.g., non-mammalian vertebrates,
such as birds (e.g., chickens or ducks) fish or frogs (e.g.,
Xenopus), and a non-mammalian invertebrates, as well as transgenic
species thereof.
[0075] As used herein, the term "immune response" is intended to
include, but is not limited to, T and/or B cell responses, that is,
cellular and/or humoral immune responses. In one embodiment, the
claimed methods can be used to stimulate cytotoxic T cell
responses. The claimed methods can be used to stimulate both
primary and secondary immune responses. The immune response of a
subject can be determined by, for example, assaying antibody
production, immune cell proliferation, the release of cytokines,
the expression of cell surface markers, cytotoxicity, and the like.
In certain aspects, the claimed gD chimeric proteins increase the
immune response in a subject when compared to the immune response
by an untreated subject or a subject who receives a vaccine
containing the same antigen but without gD.
[0076] As used herein, the term "enhancing an immune response"
includes increasing T and/or B cell responses, that is, cellular
and/or humoral immune responses, by treatment of a subject using
the claimed gD chimeric proteins and/or methods. In one embodiment,
the claimed gD chimeric proteins and/or methods can be used to
enhance cytotoxic T cell responses to the antigen (fusion partner).
In another embodiment, the claimed compounds and methods can be
used to inhibit the ability of the HVEM to interact with B and T
lymphocyte attenuator (BTLA), thus enhancing an immune response to
the antigen (fusion partner). In another embodiment, the claimed gD
chimeric protein interacts with HVEM.
[0077] As used herein, the term "immune cell" is intended to
include, but is not limited to, cells that are of hematopoietic
origin and play a role in an immune response. Immune cells include,
but are not limited to, lymphocytes, such as B cells and T cells;
natural killer cells; myeloid cells, such as monocytes,
macrophages, eosinophils, mast cells, basophils, and
granulocytes.
[0078] As used herein, the term "adjuvant" includes, but is not
limited to, agents which potentiate the immune response to an
antigen. Adjuvants can be administered in conjunction with a
nucleic acid sequence encoding a gD chimeric protein of the
invention to additionally augment the immune response.
[0079] Nucleic acid sequences encoding the gD chimeric proteins
described herein can be administered to subjects in whom it is
desirable to promote an immune response. In one embodiment, a
nucleic acid sequence encoding a gD chimeric protein described
herein is administered prophylactically, e.g., prior to infection
with a pathogen or to a subject who is free of cancer or free of an
autoimmune disease. In another embodiment, a nucleic acid sequence
encoding a gD chimeric protein described herein is administered
therapeutically, e.g., to a subjects who has a preexisting
condition, e.g., a subject who is infected with a pathogen, who has
cancer, or who suffers from an autoimmune disease.
[0080] In one embodiment, the gD chimeric protein is administered
by "genetic immunization." In this embodiment, a DNA expression
vector encoding the gD chimeric protein is injected into the
subject animal, e.g., into the skin or into a muscle of the
subject. The gene products are correctly synthesized, glycosylated,
folded, and expressed by the subject to elicit the desired immune
response. In one embodiment, DNA is injected into muscles or
delivered into the skin coated onto gold microparticles by a
particle bombardment device, a "gene gun." Genetic immunization has
been shown to induce specific humoral responses and cellular immune
responses (See, e.g., Mor et al. (1995) J. Immunol. 155:2039; Xu
and Liew (1995) Immunology 84:173; Davis et al. (1994) Vaccine
12:1503).
[0081] A dosage regimen of administration of a gD chimeric protein
or a nucleic acid sequence encoding a gD chimeric protein may be
adjusted to provide the optimum therapeutic response for each
subject without undue experimentation. For example, antibody titers
to an antigen or cellular immune responses to an antigen can be
measured to determine whether or not the subject is developing an
immune response or is manifesting an enhanced immune response to
the antigen and the dosage regimen can be adjusted accordingly.
[0082] The composition including a gD chimeric protein or a nucleic
acid sequence encoding a gD chimeric protein may also be
administered parenterally or intraperitoneally. The agent can be
administered, for example, intranasally, orally, intravenously,
intramuscularly, subcutaneously or mucosally. Dispersions can also
be prepared in glycerol, liquid polyethylene glycols, and mixtures
thereof and in oils. Under ordinary conditions of storage and use,
these preparations may contain a preservative to prevent the growth
of microorganisms.
[0083] Pharmaceutical compositions suitable for injection include
sterile aqueous solutions (where water soluble) or dispersions and
sterile powders for the extemporaneous preparation of sterile
injectable solutions or dispersion. A pharmaceutical composition of
the invention can be formulated to be suitable for a particular
route of administration. For example, in various embodiments, a
pharmaceutical composition of the invention can be suitable for
injection, inhalation or insufflation (either through the mouth or
the nose), or for intranasal, mucosal, oral, buccal, parenteral,
rectal, intramuscular, intravenous, intraperitoneal, and
subcutaneous delivery.
[0084] The composition including a gD chimeric protein or a nucleic
acid sequence encoding a gD chimeric protein will be sterile. In
addition, it will be stable under the conditions of manufacture and
storage and preserved against the contaminating action of
microorganisms such as bacteria and fingi. The carrier can be a
solvent or dispersion medium containing, for example, water,
ethanol, polyol (for example, glycerol, propylene glycol, and
liquid polyethylene glycol, and the like), and suitable mixtures
thereof. The proper fluidity can be maintained, for example, by the
use of a coating such as lecithin, by the maintenance of the
required particle size in the case of dispersion and by the use of
surfactants. Prevention of the action of microorganisms can be
achieved by various antibacterial and antifungal agents, for
example, parabens, chlorobutanol, phenol, ascorbic acid,
thimerosal, and the like. In many cases, it will be desirable to
include isotonic agents, for example, sugars, polyalcohols such as
mannitol, sorbitol, sodium chloride in the composition. Prolonged
absorption of the injectable compositions can be brought about by
including in the composition an agent which delays absorption, for
example, aluminum monostearate and gelatin.
[0085] Sterile, injectable solutions can be prepared by
incorporating a gD chimeric protein or a nucleic acid sequence
encoding a gD chimeric protein in the required amount in an
appropriate solvent with one or a combination of ingredients
enumerated above, as required, followed by filter sterilization.
Generally, dispersions are prepared by incorporating the gD
chimeric protein or the nucleic acid sequence (with or without a
carrier) encoding the gD chimeric protein into a sterile vehicle
which contains a basic dispersion medium and the required other
ingredients from those enumerated above. In the case of sterile
powders for the preparation of sterile injectable solutions, the
preferred methods of preparation are vacuum drying and
freeze-drying which yields a powder of the active ingredient (e.g.,
agent or composition) plus any additional desired ingredient from a
previously sterile-filtered solution thereof. The agent or
composition can be administered in a form suitable for use with a
needle-less injector device (such devices are known in the art
(see, e.g., U.S. Pat. Nos. 5,383,851; 5,581,198; 5,846,233) for
example as described in Mol. Med. (1998) 4:109.
[0086] When the composition including a gD chimeric protein or a
nucleic acid sequence encoding a gD chimeric protein is suitably
protected, as described above, the composition may be orally
administered, for example, with an inert diluent or an assimilable
edible carrier. As used herein "pharmaceutically acceptable
carrier" includes any and all solvents, dispersion media, coatings,
antibacterial and antifungal agents, isotonic and absorption
delaying agents, and the like. The use of such media and agents for
pharmaceutically active substances is well known in the art. Except
insofar as any conventional media or agent is incompatible with the
composition including a gD chimeric protein or a nucleic acid
sequence encoding a gD chimeric protein, use thereof in the
therapeutic compositions is contemplated. Supplementary active
compounds can also be incorporated into the compositions.
[0087] It is especially advantageous to formulate parenteral
compositions in dosage unit form for ease of administration and
uniformity of dosage. Dosage unit form as used herein refers to
physically discrete units suited as unitary dosages for the
mammalian subjects to be treated; each unit containing a
predetermined quantity of active compound calculated to produce the
desired therapeutic effect in association with the required
pharmaceutical carrier. The specification for the dosage unit forms
of the invention are dictated by and directly dependent on (a) the
unique characteristics of the active compound and the particular
therapeutic effect to be achieved, and (b) the limitations inherent
in the art of compounding such an active agent or composition for
the treatment of individuals.
[0088] The composition including a gD chimeric protein or a nucleic
acid sequence encoding a gD chimeric protein of the invention is
administered to subjects in a biologically compatible form suitable
for pharmaceutical administration in vivo to enhance immune
responses. By "biologically compatible form suitable for
administration in vivo" is meant a form of the gD chimeric protein
or a nucleic acid sequence encoding a gD chimeric protein to be
administered in which any toxic effects are outweighed by the
therapeutic effects of the agent.
[0089] Administration of a therapeutically or prophylactically
active amount of the compositions of a gD chimeric protein or a
nucleic acid sequence encoding a gD chimeric protein is defined as
an amount effective, at dosages and for periods of time necessary
to achieve the desired result. The administration of a gD chimeric
protein or a nucleic acid sequence encoding a gD chimeric protein
can result in an enhanced immune response (e.g., a stimulation of
CD8.sup.+ T cells) to an antigen (e.g., a viral or a tumor cell
antigen).
[0090] As defined herein, a therapeutically or prophylactically
effective amount of a composition of a gD chimeric protein or a
nucleic acid sequence encoding a gD chimeric protein (an effective
dosage) ranges from about 0.001 to 30 mg/kg body weight, about 0.01
to 25 mg/kg body weight, about 0.1 to 20 mg/kg body weight, or from
about 1 to 10 mg/kg, 2 to 9 mg/kg, 3 to 8 mg/kg, 4 to 7 mg/kg, or 5
to 6 mg/kg body weight. The skilled artisan will appreciate that
certain factors may influence the dosage required to effectively
treat a subject, including but not limited to the severity of the
disease or disorder, previous treatments, the general health and/or
age of the subject, and other diseases present. Moreover, treatment
of a subject with a therapeutically effective amount of an
inhibitor can include a single treatment or can include a series of
treatments. It will also be appreciated that the effective dosage
of inhibitor used for treatment may increase or decrease over the
course of a particular treatment. Changes in dosage may result from
the results of diagnostic assays as described herein.
[0091] The practice of the present invention will employ, unless
otherwise indicated, conventional techniques of cell biology, cell
culture, molecular biology, microbiology, recombinant DNA and
immunology, which are within the skill of the art. Such techniques
are explained fully in the literature. See, for example, Molecular
Cloning A Laboratory Manual, 2nd Ed., ed. by Sambrook, J. et al.
(Cold Spring Harbor Laboratory Press (1989)); Short Protocols in
Molecular Biology, 3rd Ed., ed. by Ausubel, F. et al. (Wiley, NY
(1995)); Current Protocols in Molecular Biology, John Wiley &
Sons, Inc., 1998; DNA Cloning, Volumes I and II (D. N. Glover ed.,
1985); Oligonucleotide Synthesis (M. J. Gait ed. (1984)); Mullis et
al. U.S. Pat. No. 4,683,195; Nucleic Acid Hybridization (B. D.
Hames & S. J. Higgins eds. (1984)); the treatise, Methods In
Enzymology (Academic Press, Inc., N.Y.); Immunochemical Methods in
Cell and Molecular Biology (Mayer and Walker, eds., Academic Press,
London (1987)); Handbook of Experimental Immunology, Volumes I IV
(D. M. Weir and C. C. Blackwell, eds. (1986)); and Miller, J.
Experiments in Molecular Genetics (Cold Spring Harbor Press, Cold
Spring Harbor, N.Y. (1972)).
[0092] The following examples are set forth as being representative
of the present invention. These examples are not to be construed as
limiting the scope of the invention as these and other equivalent
embodiments will be apparent in view of the present disclosure,
figures, tables, and accompanying claims. The contents of all
references, patents and published patent applications cited
throughout this application are hereby incorporated by reference in
their entirety for all purposes.
Example 1
Materials and Methods
[0093] Construction of HSV-1 gD Fused Genes
[0094] A number of DNA and adenovirus vector vaccines were
constructed and tested (Table 1). The chimeric gene gDE7E6E5 was
constructed based on the fusion of the HPV-16 E7, E6 and E5
oncoproteins and the HSV-1 gD protein. Although in this example the
HPV proteins are in the order E7, E6, and E5, they can be used in
any order. The E7, E6 and E5 genes, without their respective stop
codons, were amplified by PCR using the HPV-16 complete genome as a
template. The gD gene is from HSV-1. E7, E6, and E5 genes are from
HPV-16. Gag is a codon-optimized truncated form of gag from HIV-1
clade B. SgD is a mutated form (W294A) of HSV-1 gD, which shows
high affinity to HVEM (Krummenacher et al., 2005). NBEF is a
mutated HSV-1 gD, which contains mutations that has been described
to prevent gD-HVEM interaction (Connelly et al, 2003); see SEQ ID
NO:37. pRE4 was provide by Drs. Gary Cohen and Roselyn Eisenberg
(Cohen et al., 1988). AdC68gag was previously described by
Fitzgerald and collaborators (2003).
TABLE-US-00001 TABLE 1 List of vaccine vectors used. Vector name
Genes encoded Vaccine carrier pRE4 (pgD) gD DNA vaccine pE7E6E5 E7,
E6, and E5 DNA vaccine pgDE7E6E5 gD, E7, E6, and E5 DNA vaccine
pgDE7 gD and E7 DNA vaccine pSgDE7 SgD (gDW294A) and E7 DNA vaccine
pSgDE7E6E5 SgD, E7, E6, and E5 DNA vaccine pNBEFgDE7E6E5 NBEFgD,
E7, E6 and E5 DNA vaccine pgag gag DNA vaccine pgDgag gD and gag
DNA vaccine AdC68gD gD E1-deleted adenovirus vector, chimpanzee
serotype 68 AdC68E7 E7 E1-deleted adenovirus vector, chimpanzee
serotype 68 AdC68E7E6E5 E7, E6, and E5 E1-deleted adenovirus
vector, chimpanzee serotype 68 AdC68gDE7E6E5 gD, E7, E6, and E5
E1-deleted adenovirus vector, chimpanzee serotype 68 AdC68gag gag
E1-deleted adenovirus vector, chimpanzee serotype 68 AdC68gDgag gD
and gag E1-deleted adenovirus vector, chimpanzee serotype 68
[0095] Separate amplification reactions were carried out with the
following primers: E7FwApaI and E7RvNarI, E6FwNarI and E6RvNotI,
and E5FwNotI and E5RvApaI (Table 2). The DNA fragment of the E7
gene was cleaved with ApaI and NotI. The E6 DNA fragment was
cleaved with NotI and NarI, and the E5 was cleaved with NarI and
ApaI. All DNA fragments were cloned into the ApaI site in the pRE4
vector, provided by Drs. Gary Cohen and Roselyn Eisenberg
(University of Pennsylvania, USA) (Cohen et al., 1988). The correct
in-frame cloning of E7-, E6- and E5-encoding genes was confirmed
after nucleotide sequencing at Wistar Sequencing Facility. Control
vectors pE7E6E5 and AdC68E7E6E5 were generated by PCR using
pgDE7E6E5 as template and primers E7FwHindIII and E5RvHindIII
(Table 2). AdC68gD control vector was generated using pRE4 as
template and primers gDFwXbaI and gDRvXbaI (Table 2).
TABLE-US-00002 TABLE 2 List of primers used Primer Sequence (5'-3')
E7FwApaI GCTGTAGGGCCCCATGGAGATACACCTAC (SEQ ID NO:1) E7RvNarI
CATGGTGGCGCCTGGTTTCTGAGAACAG (SEQ ID NO:2) E6FwNarI
AGACATGGCGCCCACCAAAAGAGAACTGC (SEQ ID NO:3) E6RvNotI
CTCCATGCGGCCGCCCAOCTGGGTTTCTCTACG (SEQ ID NO:4) E5FwNotI
GACAAAGCCOCCCCCTGCATCCACAACATTAC (SEQ ID NO:5) E5RvApal
ACATATGGGCCCTGTAATTAAAAAGCGTGC (SEQ ID NO:6) E7FwHindIII
GCGTGGAAGCTTATCGGAGATACACCTAC (SEQ ID NO:7) E5RvHindIII
TGGOGCAAGCTTTTAAATTAAAAAGCGTGC (SEQ ID NO:8) gDFwXbaI
CCCTAGTCTAGAATGGGGCGGGCTGCCGCC (SEQ ID NO:9) gDRvXbaI
CCCTAGTCTAGACTAGTAAAACAAGGGCTGGTG (SEQ ID NO:10) gagFwNarI
AAGAAGGGCGCCGGTGCGAGAGCGTCAG (SEQ ID NO:11) gagRvNarI
AAGGGTGGCGCCCAAAACTCTTGCCTTATGGC (SEQ ID NO:12) gDFwHindIII
AAGCCCAAGCTTATGGGGGGGGCTGCCGCC (SEQ ID NO:13) gDRvHindIII
AAGCCCAAGCTTCTAGTAAAACAAGGGCTGGTG (SEQ ID NO:14) NBEFgDRv
GACCGCAAGGTCTTTGCCGCGAAAGCGAGCGGGGTCGGC CGCCTTGAG (SEQ ID NO:15)
NBEFgDFw CGCTTTCGCGGCAAAGACCTTCCCGTCGCGCACGCGGCG GCCGCCCC (SEQ ID
NO:16) SgDFw CAAATCCAACAAAACGCGCACATAGGCTCGATCC (SEQ ID NO:17)
SgDRv GATCGACGGTATGTGCGCGTTTGGTGGGATTTGC (SEQ ID NO:18)
[0096] To construct the AdC68gDE7E6E5 vector, the gDE7E6E5 chimeric
gene was amplified by PCR using the pgDE7E6E5 vector as a template.
The PCR reaction was carried out with gDFwXbaI and gDRvXbaI primers
(Table 2). The DNA fragment of the gDE7E6E5 chimeric gene was
cleaved with XbaI and cloned into XbaI site on the shuttle vector
(BD PharMingen, San Diego, Calif.). The pShuttlegDE7E6E5 clone was
confirmed by restriction analysis and sub-cloned into E1-deleted
chimpanzee-derived adenovirus vector serotype 68 using PI-SceI and
I-CeuI sites as described (Fitzgerald et al. 2003).
[0097] The gDgag chimeric gene was generated by insertion of the
codon-optimized truncated form of gag from HIV-1 clade B into the
HSV-1 gD NarI site. The gag gene was amplified by PCR using the
pCMVgag vector as a template and primers gagFwNarI and gagRvNarI
(Table 2). The DNA fragment corresponding to gag gene was cleaved
with NarI, cloned into pShuttlegD, and then sub-cloned into AdC68
vector as described above.
[0098] Construction of gD Mutants
[0099] The SgDE7 mutated gene was constructed using
QUICKCHANGE.RTM. site-directed mutagenesis kit (Stratagene Cloning
Systems, La Jolla, Calif.) as recommended by the manufacturer.
Briefly, SgDFw and SgDRv primers (Table 2), designed to mutate the
amino acid residue 294 of gD, were used to PCR amplify the entire
pgDE7 vector. The reaction products were then treated with DpnI and
used to transform DH5a E. coli cells. The NBEFgDE7E6E5 gene (see
SEQ ID NO:37) was generated by mutation of residues crucial for
HVEM-gD interaction. HSV-1 gD residues 11, 15, 25, 27, 28, 29, and
30, were mutated to alanine by gene splicing by overlap extension
(i.e., gene SOEing). Briefly, two PCR reactions were carried out
using set of primers, (i) with gDFwHindIII and NBEFgDRv, and (ii)
with NBEFgDFw and gDRvHindIII (Table 2). Vector pgDE7E6E5 was used
as a template in both PCR reactions. Two amplified fragments were
used as template to PCR reaction with gDfWHindIII and gDRvHindIII
primers (Table 2). The NBEFgDE7E6E5 DNA fragment was cloned into
the same pgDE7E6E5 backbone vector. Both mutant gD sequences were
confirmed by sequencing the entire gene at Wistar Sequencing
Facility.
[0100] DNA Vaccine and E1-Deleted Chimpanzee-Derived Adenovirus
Purification
[0101] DNA vaccines were propagated in E. coli K12 DH5.alpha. cells
in LB medium supplemented with ampicillin and purified with the
Maxi Prep Kit (QIAGEN.RTM., Valencia, Calif.). The DNA
concentration was determined by spectrophotometry at 260 nm and
confirmed by visual inspection of ethidium bromide-stained 1%
agarose gels in comparison to DNA fragments of known concentration
(Invitrogen, Carlsbad, Calif.). Plasmids were kept at -20.degree.
C. until use, at which time the DNA concentration was adjusted to 1
.mu.g/.mu.l in phosphate-buffered saline (PBS). AdC68 vectors were
propagated using E1-transfected HEK 293 cells and purified by CsCl
gradient centrifugation as previously described (Fitzgerald et al.,
2003). Upon purification, the concentration of each virus vector
batch was determined by measuring virus particles (vp) by
spectrophotometry at 260 nm.
[0102] Cell Lines
[0103] TC-1 tumor cells, derived from C57BL/6 origin lung
epithelial cells transformed with v-Ha-ras and HPV-16 E6 and E7
genes, were provided by Dr. T. C. Wu, Johns Hopkins University, USA
(Lin et al., 1996). Mouse melanoma cells B78H1 and B78H1/3E5, which
express HVEM fused to EGFP, were provided by Drs. Gary Cohen and
Roselyn Eisenberg (University of Pennsylvania, USA). E1-transfected
HEK 293 cells were used to propagate E1-deleted chimpanzee derived
adenovirus vectors. All cells were propagated in DMEM supplemented
with glutamine, sodium pyruvate, nonessential amino acids, HEPES
buffer, antibiotic, and 10% FBS (TC-1, CHO/CAR and E1-transfected
HEK 293 cells) or 5% FBS (B78H1 and B78H1/3E5 cells). CHO cells
stably transfected to express the coxsackie adenovirus receptor
(CHO/CAR) were obtained from J. Bergelson (Childrens Hospital of
Philadelphia).
[0104] Animals and Immunization
[0105] Female BALB/c and C57Bl/6 mice at 6-8 weeks of age were
purchased from Jackson Laboratory (Bar Harbor, Me.) or Charles
River Laboratories (Boston, Mass.) and housed at the Animal
Facility of the Wistar Institute. All procedures involving handling
and sacrifice of animals were performed according to approved
protocols in accordance with recommendations for the proper use and
care of laboratory animals at the Wistar Institute. Groups of 5 to
10 BALB/c and C57Bl/6 mice were intramuscularly (i.m.) vaccinated
with the DNA vaccines or E1-deleted chimpanzee derived adenovirus
vectors into the tibialis anterior muscle of each hind limb. DNA
vaccine was given at 100 .mu.g divided in two 50 .mu.l aliquots.
E1-deleted chimpanzee-derived adenovirus vectors (AdC68) were
inoculated from 1.times.10.sup.8 to at 5.times.10.sup.10 vp per
mouse. For most experiments AdC68 vectors were inoculated at
10.sup.10 viral particles per mouse.
[0106] E7 Transgenic Mouse
[0107] The E7 transgenic mouse was based on a similar mouse where
E7 is expressed in the thymus under the control of the
thyroglobulin promoter (Ledent et al., Oncogene 1995; 10:1789-97).
The plasmid used to create the E7 mouse was a very generous gift
from Dr. Catherine Ledent, Universite Libre de Bruxelles. The
plasmid, constructed in the pSG5 vector, contained the bovine
thyroglobulin promoter, a rabbit .beta.-intron, the E7 gene, and a
polyadenylation signal in a gene cassette. The bovine thyroglobulin
promoter was used as it has been shown to be tightly regulated and
expressed in thyrocytes (Ledent et al., Proc Natl Acad Sci USA
87:6176, 1990). The rabbit 5-intron was used to increase the
expression of the transgenes (Palmiter et al., Proc Natl Acad Sci
USA 88:478, 1991). This cassette was removed and purified by gel
electrophoresis followed by a Geneclean kit (Q-Biogen, Morgan
Irvine, Calif.). DNA was concentrated by ethanol precipitation. The
cut DNA was then microinjected by the University of Pennsylvania
School of Medicine Transgenic Facility under the direction of Dr.
Jean Richa. The founder mouse strain was C57BL/6. The founder mice
were thus mated to wild type C57BL/6, and the progeny back crossed
and screened by the .DELTA.CT real time PCR method for
homozygosity. The E7 .mu.g mice were bred at the Animal Facility of
the Wistar Institute from a pair provided by Dr. Y. Patterson
(University of Pennsylvania). All animal procedures were performed
in accordance with recommendations for the proper use and care of
laboratory animals at the Wistar Institute. Groups of 3 to 10
animals were vaccinated i.m. with the E1-deleted AdC68 vectors into
the tibialis anterior muscle of each hind limb. AdC68 vectors were
inoculated at 5.times.10.sup.10 vp per mouse unless stated
otherwise.
[0108] Intracellular Cytokine Staining
[0109] Intracellular IFN-.gamma. staining was performed using
peripheral blood mononuclear cells (PBMC) and cells from the spleen
two weeks after the DNA vaccine dose or 10 days after E1-deleted
chimpanzee-derived adenoviral vector administration unless stated
otherwise. Samples were washed twice with L-15 medium. Cells were
then treated for 5 minutes on ice with ACK lysis buffer
(Invitrogen) to rupture red blood cells, washed, and suspended in
DMEM supplement with 2% FBS. Samples were cultured at a
concentration of 10.sup.6 cells/well for 5 hours at 37.degree. C.
in a 96-well round bottom microtiter plate (Costar) in 200 .mu.l of
DMEM supplemented with 2% FBS and 10.sup.-6 M 2-mercaptoethanol.
Brefeldin A (GolgiPlug; BD PharMingen) was added at 1 .mu.l/ml. The
E7-specific RAHYNITF. (SEQ ID NO:19) peptide, which carries the
immunodominant epitope of E7 for mice of the H-2b haplotype, or the
AMQMLKETI (SEQ ID NO:20) peptide, which carries the immunodominant
MHC class I epitope of gag for mice of the H-2d haplotype, were
used for peptide stimulation at a concentration of 3 .mu.g/ml. The
V3 control peptide delineated from the sequence of the envelope
protein of HIV-1 clade B (VVEDEGCTNLSGF; SEQ ID NO:21) and the
SIINFEKL peptide (SEQ ID NO:30) were used as control peptides.
After washing, cells were incubated for 30 min at 4.degree. C. with
100 .mu.l of a 1:100 dilution of a fluorescein (FITC)-conjugated
monoclonal antibody to mouse CD8a (BD PharMingen). Cells were
washed once with PBS followed by permeabilization with
Cytofix/Cytoperm (BD PharMingen) for 20 min at 4.degree. C., washed
twice with Perm/Wash buffer (BD PharMingen) and incubated in the
same buffer for 30 min at 4.degree. C. with 50 .mu.l of a 1:100
dilution of a phycoerythrin (PE)-labeled monoclonal antibody to
mouse IFN-.gamma. (BD PharMingen). After washing, cells were
suspended in PBS and examined by two-color flow cytometry using an
EPICS Elite XL (Beckman Coulter). Data were analyzed by WinMDi
software. The percentages of antigen specific CD8.sup.+ T cells
that stained positive for IFN-.gamma. over all CD8.sup.+ T cells
were determined.
[0110] TC-1 Challenge
[0111] C57Bl/6 Mice were challenged subcutaneously (s.c.) with
1.times.10.sup.5 TC-1 cells suspended in 100 .mu.l of serum-free
media, and injected at one rear flank. To determine the protection
of pre-challenge vaccination mice were challenged 10 and 14 days
after vaccination with DNA vaccine or E1-deleted chimpanzee derived
adenovirus vector, respectively. Post-challenge vaccination was
evaluated with mice challenged five days before vaccination
(Example 3 and 15). Tumor growth in pre- and post-challenge
vaccinated mice was monitored by visual inspection and palpation
three times a week. Animals were scored as tumor-bearing when
tumors attained sizes of approximately 1-2 mm in diameter. Mice
were euthanized once tumors exceeded a diameter of 1 cm. Tumor
growth was followed for a period of 60 days after the
challenge.
[0112] Statistical Analysis
[0113] Experiments were conducted using 3-10 mice per group.
Samples tested by ELISA were assayed in triplicates. Results show
the means.+-.standard deviation (SD). Intracellular cytokine
staining was conducted with PBMC from individual mice, while
tetramer and markers staining were performed with pooled samples.
Significances between two groups were analyzed by one-tailed
student's t-test.
[0114] HVEM Binding Assay
[0115] CHO/CAR cells were infected with either AdC68gD, AdC68gag,
or AdC68gDgag. After 72 hrs, cells were harvested, suspend in 1 ml
of extraction buffer (10 mM Tris, 150 mM NaCl, 10 mM EDTA, 1%
NP-40, 0.5% sodium deoxycholate, 1 mM PMSF [pH 8.0]) supplement
with Complete Protease inhibitor (Roche, Basel, Switzerland), and
incubated at 4.degree. C. for 1 hour. After spinning at 12,000 g
for 15 min at 4.degree. C., protein extracts were kept at
-80.degree. C. until use. A capture enzyme-linked immunosorbent
assay (ELISA) was used to normalize the amount of gD in the
extracts. ELISA plates were coated with 50 .mu.l of a 10 .mu.g/ml
concentration of ID3 monoclonal antibody (MAb) diluted in PBS/well.
After an overnight incubation at 4.degree. C., plates were exposed
to blocking solution for 1 hour and then to extracts diluted in
blocking solution for 2 hours at room temperature. Captured gD was
detected by adding 50 .mu.l of a 1 .mu.g/ml concentration of Pab
R7/well followed by goat anti-rabbit antibody coupled to
horseradish peroxidase. Plates were rinsed with 20 mM citrate
buffer (pH 4.5), ABTS peroxidase substrate was added, and the
absorbance at 405 nm was recorded by using a microtiter plate
reader. The level of gD in each extract was normalized by dilution
in extraction buffer. To assess receptor binding of the gD mutants,
ELISA plates were coated overnight with 50 .mu.l of human-HVEM (5
.mu.g/ml), exposed to blocking solution, and incubated with
normalized cell extracts diluted in blocking solution for 2 hours
at room temperature. Bound gD was detected as described above
soluble gD306 (Nicola et al., J. Virol. 71, 2940-46, 1997; Sisk et
al., J. Virol. 68, 766-75, 1994) and gD285 (Whitbeck et al., J.
Virol. 71, 6083-93, 1997), purified as described previously, were
used at 1 .mu.M.
[0116] Detection of Transcripts by Real-Time PCR
[0117] Total RNA was isolated from CHO/CAR cells 48 hrs after
infection with the Ultraspec RNA solution system kit (Biotex). The
mRNA was reversed transcribed in vitro using MEGAscript
transcription kit (Ambion). Remaining DNA was removed by treatment
with DNase I (Ambion) for 1 h at 37.degree. C. Quantification of
the housekeeping gene glyceraldehyde-3-phosphate dehydrogenase
(GAPDH) was performed to normalize the amount of cDNA in each
sample. Normalized cDNA samples were used for amplification with
E5-, E6-, E7- and gD-specific primers. Quantitative real-time PCR
reactions were conducted using the LightCycler-RNA amplification
kit SYBR Green 1 (Boehinger Mannheim), following manufacture's
conditions. Samples were quantified in triplicate by three
independent experiments.
[0118] Confocal Microscopy and FACS Analysis
[0119] B78H1/3E5 cells, which express HVEM fused to Enhanced Green
Fluorescence Protein (HVEM-EGFP), or B78H1 cells (both obtained
from Drs. Gary Cohen and Roselyn Eisenberg, University of
Pennsylvania) were infected with either AdC68gD, AdC68gag, or
AdC68gDgag. CHO/CAR cells were infected with AdC68gD, AdC68E7E6E5,
or AdC68gD-E7E6E5. After 48 hours, cells were directly stained or
permeabilized with Cytofix/Cytoperm (BD PharMingen) and then
stained with anti-gD MAb (DL-6) followed by anti-mouse IgG
conjugated with Texas Red or PE. Confocal microscopy was performed
with a Leica TCS SP2 Confocal Microscope at 400.times. final
magnification. Cell suspensions were analyzed using an EPICS XL
(Beckman-Coulter, Inc., Miami, Fla.) to determine presence of
gDgag. Data were analyzed by Flowjo software (Tree Star, Inc.).
[0120] Molecular Modeling of gD-Gag
[0121] The 3-dimensional models of the gD-gag were constructed with
the MODELLER package.sup.44,45 by combining the structures of
individual protein domains as determined by X-ray crystallography.
The receptor bound form of gD-gag model was based upon the HSV-1 gD
HVEM complex (1JMA).sup.12, chain A, residues 1:259; SIV gag
(1ECW).sup.46, residues 1:119; and HIV-1 gag (1E6J).sup.47, chain
P, residues 11:220. The gD-gag unligated form was based upon the
Cyclophilin A/HIV-1Chimera Complex (1M9D).sup.48, chain A, residues
1:15; HSV-1 gD (2C36).sup.15, chain A, residues 23:256; SIV gag
(1ECW), residues 1:119; and HIV-1 gag (1E6J), chain P, residues
11:220. Ribbon representations were prepared within the Swiss-Pdb
Viewer program.sup.49 and rendered with the Persistence of Vision
Ray Tracer program (POV-Ray 2004, version 3.6).
[0122] In Vitro T Cell Proliferation Assay
[0123] Cells were harvested from draining popliteal lymph node of
naive and mice i.m. immunized 24 hrs earlier with 10.sup.11 vps of
AdC68gD or AdC68E7E6E5 then irradiated with 2000 RADs. CD8.sup.+
cells were isolated from the spleens of OT-1 mice by negative
selection using magnetic beads (Miltenyi Biotec) and labeled with 2
.mu.M CFSE (Molecular Probes). A total of 1.times.10.sup.6
irradiated lymph node cells were cultured with 1.times.10.sup.5
CD8.sup.+ CFSE-labeled OT-1 cells in presence of either SIINFEKL
peptide or control peptide AMQMLKETI (both at 10.sup.-8 M, Alpha
Diagnostic International) in 96-well plate wells for 72 hours.
Cells were stained with anti-CD8-PerCP and anti-V.alpha.2-PE (both
BD Pharmingen) for 30 min on ice. Cells were examined on a
FACSCalibur using CellQuest software (BD Biosciences Pharmingen)
and were analyzed using FlowJo software version 7.1.2 (TriStar,
Inc).
[0124] ELISA for Antibodies to Gag
[0125] Sera from the vaccinated or naive mice were tested on plates
coated with purified gag protein. Briefly, 96-well round-bottom
Maxisorb (Nunc) plate wells were coated overnight with 0.2 .mu.g of
gag p24 HIV-1 (Immuno Diagnostics, Inc.) diluted in 100 .mu.l of
coating buffer (15 mM Na.sub.2CO.sub.3, 35 mM NaHCO.sub.3 and 3 mM
NaN.sub.3, pH 9.6). The next day plates were blocked with 200 .mu.l
of PBS containing 3% BSA for 2 hours. Serum samples were serially
diluted in PBS supplemented with 3% BSA and in triplicates at 100
.mu.l/well on the gag-coated plates for 1 h at room temperature.
Plates were washed, and a 1:200 dilution of alkaline
phosphatase-conjugated goat anti-mouse Igs (Cappel) was added to
each well for 1 h at room temperature. After washing, plates were
incubated with substrate (10 mg d-nitrophenyl phosphate disodium
dissolved in 10 ml of 1 mM MgCl.sub.2, 3 mM NaN.sub.3, and 0.9 M
diethanolamine, pH 9.8), and then read in an automated ELISA reader
at 405 nm (model EL311, Bio-Tek Instruments).
[0126] Isolation of Lymphocytes
[0127] Peripheral blood mononuclear cells (PBMC), spleen and livers
were harvested as described (Lasaro et al., Microbes Infect 2005;
7:1541-50; Lin et al., Cancer Res 1996; 56:21-6).
Tumor-infiltrating lymphocytes (TILs) were isolated from
matrigel-tumors 3 or 10 days after challenge as described (22).
TILs from the thyroid of E7-tg mice were harvested upon treatment
of thyroid tissue fragments with 2 mg/ml collagenase P (Roche) and
1 mg/ml DNase I (Invitrogen). After 1 hour, the thyroid was
homogenized and filtrated through a 70-mm cell strainer. Cells were
washed with RPMI (Cellgro) media supplemented with 5% FBS, treated
for 5 min on ice with Ack lysing buffer (Invitrogen) to rupture red
blood cells, then suspended in 7 mL 40% percoll (Amersham
Bioscience, Piscataway, N.J.), and applied on top of 3 mL 70%
percoll. After centrifugation at 2200 rpm for 20 min at room
temperature, the cells at the interface were harvested and
resuspended in media.
[0128] Tetramer and Lymphocyte Markers Staining
[0129] Antigen-specific CD8.sup.+ T cells were detected by
APC-labeled MHC class I tetramers carrying the AMQMLKETI peptide
(SEQ ID NO:20) of gag or the RAHYNIVTF peptide of E7 (E7tet; SEQ ID
NO:19) (MHC Tetramer Core Facility, Emory University Vaccine
Center, Atlanta, Ga.). PBMC and splenocytes isolated 10 days after
immunization with AdC68 vectors were treated as described for
intracellular cytokine staining. Samples were stained for 30
minutes at room temperature with gag-tet and anti-CD8a-PerCP in
combination with the following antibodies: CD25-PE, CD122-PE,
CD127-PE, CD27-PE, BTLA-PE (eBioscience), PD1-PE, CD62L-FITC,
CD69-FITC, CD103-FITC, CD43-FITC, CD44-FITC and CD54-FITC (all from
BD Biosciences Pharmingen, unless indicated otherwise). For Bcl2
and CTLA-4 staining, cells were washed, permeabilized for 30 min at
4.degree. C. with Cytofix/Cytoperm (BD Biosciences Pharmingen), and
then stained with antibodies Bcl2-PE or CTLA-PE (BD Biosciences
Pharmingen).
[0130] Lymphocytes were stained for 30 minutes at room temperature
with E7-tet and anti-CD8a-PerCP together with the following
antibodies: BTLA-PE (eBioscience), CD44-FITC, CD62L-PE, CD27-PE,
CD127-PE, CD122-PE and PD1-PE (BD Biosciences Pharmingen). For Bcl2
and CTLA4 staining, cells were washed, permeabilized for 30 min at
4.degree. C. with Cytofix/Cytoperm (BD Biosciences Pharmingen), and
then stained with antibodies Bcl2-PE or CTLA-PE (BD Biosciences
Pharmingen). Flow cytometry analyses were performed with at least
100,000 viable cells live-gated on FACSCalibur using CellQuest
software (BD Biosciences Pharmingen) and were analyzed using FlowJo
software version 7.1.2 (TriStar, Inc).
Example 2
Fusion Protein Constructs
[0131] The HPV-16/HSV-1 glycoprotein D (gD) chimeric gene, called
gDE7E6E5, was composed of the complete open reading frame of gD,
which had incorporated into the ApaI site a fusion gene composed of
HPV-16 E5, E6 and E7 genes without respective start and stop codons
(FIG. 1). The HIV-1/gD chimeric gene, named gDgag, was composed of
the complete open reading frame of gD which had incorporated into
the NarI site a codon-optimized truncated form of gag HIV-1 clade B
(FIG. 2).
Example 3
Effects of Fusion Protein Constructs on Host-Immune System
[0132] Mice were immunized with 100 .mu.g/mouse of DNA vaccines or
5.times.10.sup.10 virus particles/mouse of E1-deleted adenovirus
vectors. After 14 days (DNA vaccines) or 10 days (E1-deleted
adenovirus vaccines) peripheral blood mononuclear cells (PBMC) were
stained for CD8 and IFN-.gamma. by intracellular cytokine staining.
Percentage represents number of CD8.sup.+/IFN-.gamma..sup.+ cells
over total number of CD8.sup.+ cells.
[0133] Pre-challenge vaccination: ten days after immunization mice
were challenged with 5.times.10.sup.5 TC-1 cells (10 mice per
group), in vitro transformed syngeneic cells which express E7 and
E6 and induce tumors in C57Bl/6 mice, and tumor growth was
following per 60 days. Percentage represents number of tumor-free
mice over total mice challenged at day 60.
[0134] Post-challenge vaccination: Mice (10 per group) were
vaccinated 5 days after challenged with 5.times.10.sup.5 TC-1
cells. Tumor growth was followed for 60 days.
[0135] The results are shown in Table 3. Percentage represents
number of tumor-free mice over total mice challenged at day 60. The
fusion gene gDE7E6E5 expressed by a DNA vaccine (pgDE7E6E5) or an
E1-deleted chimpanzee-derived adenovirus vector (AdC68gDE7E6E5)
induced high frequencies of E7-specific CD8.sup.+ T cells and
complete protection against tumor cell challenge after a single
dose. However, neither E7-specific CD8.sup.+ T cell responses nor
protection to challenge were developed when gD was not present,
indicating that this fusion had dramatically improved the efficacy
of the vaccines.
TABLE-US-00003 TABLE 3 Protection upon Protection upon E7-specific
CD8.sup.+ pre-challenge post-challenge Immunization T cell response
.sup.b vaccination .sup.c vaccination .sup.d pRE4 (gD only) 0.11%
0% 0% pE7E6E5 0.18% 0% 0% pgDE7E6E5 5.53% 100% 70% AdC68gD 0.05% 0%
0% AdC68E7E6E5 0.05% 0% 0% AdC68gDE7E6E5 21.94% 100% 100%
[0136] An E1-deleted chimpanzee-derived adenovirus carrying a
codon-optimized, truncated form of gag HIV-1 clade B (AdC68gag) has
been shown to induce a strong specific CD8.sup.+ T cell response
(Fitzgerald et al. (2003) J. Immunol. 170:1416). However,
gag-specific CD8.sup.+ T cell frequencies induced by the DNA
vaccine (pgDgag) and the E1-deleted chimpanzee-derived adenovirus
vector (AdC68gDgag) were higher when gag was fused into gD (FIG.
3). The effect of gD fusion was more remarkable when lower amounts
of adenovirus vector were used for vaccination (FIG. 3B).
[0137] Although chimpanzee-derived adenovirus vectors circumvented
the expected negative effect of preexisting immunity to common
human serotypes of adenovirus, such as serotype 5 (AdHu5), the
efficacy of AdC68 vaccination was decreased by approximately 50%
when neutralizing antibodies to AdHu5 were present. Although not
wishing to be bound by this explanation, this reduction likely is
caused by pre-existing T cell that cross-react between adenovirus
of the human serotype 5 and the chimpanzee adenoviruses. However,
AdC68 vaccinations carrying antigens fused with HSV-1 gD were only
weakly influenced by those antibodies (FIG. 4).
Example 4
Interaction of Constructs which Encode Fusion Proteins with
HVEM
[0138] Efficacy of the vaccine was related to the localization of
the transgene in relationship the N-terminus of gD. The specific
region localized in the N-terminal portion of gD, which interacts
with the herpes virus entry mediator (HVEM), was crucial in
enhancing stimulation of specific CD8.sup.+ T cell mediated immune
response. A mutated form of gD chimeric protein gDE7E6E5, called
NBEFgDE7E6E5, was generated altering specific gD amino acids (M11A,
N15A, L25, Q27A, L28A, T29A, D30A), which promote gD-HVEM
interaction. The mutated form of gDE7E6E5 expressed by DNA vaccine
was not able to induce an E7-specific CD8.sup.+ T cell response,
although mutated and non-mutated gDE7E6E5 genes were transcribed at
the same level (FIG. 5). On the other hand, a single-amino acid
modification on HSV-1 gD (W294A), was able to enhance the efficacy
of a gD/E7 fusion DNA vaccine (FIG. 6).
[0139] The interaction of HSV-1 gD with HVEM interferes with
down-regulation of immune responses associated with HVEM-BTLA (B
and T lymphocyte attenuator) pathway. Without intending to be bound
by theory, maintenance of gD interference in HVEM-BTLA pathway is a
important key to enhance a specific T cell mediated immune response
to one or more heterologous antigens. To this end, it was
demonstrated that a fusion of an antigen, such as HIV-1 gag, into
the C-terminal region of HSV-1 gD did not decrease its affinity to
bind to HVEM (FIG. 7). The ability of HSV-1 gD to bind HVEM was not
affected by fusion with HIV-1 gag. In fact, the affinity to HVEM of
HIV-1 gag/HSV-1 gD chimeric protein was slight higher than
non-fused gD.
[0140] Confocal microscopy and FACS analyses of cells infected in
vitro with AdC68gDgag provided additional evidence that gDgag bound
HVEM (FIGS. 8 and 9). Confocal microscopy indicated that gDgag was
co-localized with HVEM on the membrane (FIG. 8A) and inside (FIG.
8B) cells infected with AdC68gDgag. Also, cell surface gD staining
on AdC68gDgag-infected cells demonstrated that the amount of gD was
greater on cells that expressed HVEM than on cells that did not
express HVEM (FIG. 9). These results indicate that gDgag bound
HVEM, that part of gDgag expressed by the infected cell bound HVEM
inside the cell, and that the complex of gDgag-HVEM was transported
from the inside the cell to the cell surface. In addition, confocal
microscopy and gD staining indicate that gDgag encoded by
AdC68gDgag-infected cell was able to bind to HVEM expressed on the
surface of other non-infected cells (FIG. 10).
[0141] Human derived serotype 2 adeno-associated virus (AAV)
vectors encoding the gDgag chimeric protein induced higher
CD8.sup.+ T cell response against gag than AAV vector encoding only
gag (FIG. 14). In addition, immunization with AAVgDgag enhanced
CD8.sup.+ T cell response against AAV capsid.
Example 5
CD8.sup.+ T Cell Response Against NP
[0142] The chimeric protein gDNP is composed of the complete open
reading frame of HSV-1 gD, into which we incorporated into the ApaI
site the nucleoprotein P(NP) gene from Influenza virus A/PR8
without respective start and stop codons (FIG. 15).
[0143] Mice were immunized with 100 .mu.g of DNA vaccine vector
pgDNP or pNP. Fourteen days after immunization peripheral blood
mononuclear cells (PBMCs) were isolated and cell surface stained
with the NP-tetramer and a labeled antibody to CD8. Naive mice were
used as negative control. Data are shown in FIG. 16 and represent
percentages of NP-tetramer.sup.+CD8.sup.+ T cells over all detected
CD8.sup.+ T cells. This experiment demonstrated that the gDNP
chimeric protein expressed by DNA vaccine vector induced
NP-specific CD8.sup.+ T cell response in mice after a single
immunization.
Example 6
Molecular Modeling
[0144] To examine how insertion of a foreign sequence within the C
terminus may modify folding of gD we modeled the structure of
unligated gD-gag (FIGS. 18A, 18B) and of gD-gag bound to HVEM
(FIGS. 18C, 18D). The C-terminus of the native unligated gD
structure is anchored near the N-terminal region and thus masks the
HVEM binding site (Krummenacher et al, EMBO J. 24, 4144-53, 2005;
FIG. 19). However, computational modeling of the gD-gag structure
predicts that the C-terminus would be shifted away from the
N-terminal portion without altering the core structure or the N
terminus, which is required to form the HVEM binding site (FIGS.
18A, 18B). A superposition of X-ray structure of gD upon the gD-gag
model indicates that insertion of gag into gD does not disrupt the
integrity of the HVEM binding surface (FIGS. 18B, 18D).
Example 7
Cellular Localization of Chimeric gD Proteins
[0145] Binding of gD to HVEM presumably depends on secretion or
cell surface expression of gD. To determine the cellular
localization of the chimeric gD-gag protein, B78-H1/3E5 cells,
which express human HVEM-EGFP on their surface, were infected with
AdC68gag, AdC68gD or AdC68gD-gag, stained with a monoclonal
antibody (MAb) to gD and analyzed by confocal microscopy (FIG. 19).
Both gD and gD-gag co-localize with HVEM on the surface of infected
cells as well as within infected cells. Similar results were
obtained upon staining of cells with antibodies to gag. Absolute
levels of gD-gag expressed on the surface of infected cells were
below those of native gD (FIG. 20). Analyses of mRNA levels showed
that all vectors transcribed the chimeric genes at equal amounts to
their corresponding non-chimeric versions. Thus the lower levels of
cell surface expression of the chimeric protein suggest inefficient
secretion, rapid re-internalization of gD-gag or accelerated
proteolytic degradation. The presence of HVEM on the cell surface
increased the amount of gD-gag (FIG. 20) on the cell surface
suggesting that intracellular binding of HVEM to gD-gag stabilized
gD-gag or facilitated export of the chimeric protein.
[0146] When AdC68gD or AdC68gD-gag infected HVEM negative (HVEM)
cells were mixed with uninfected cells expressing HVEM
(HVEM.sup.+), both gD and gD-gag co-localized with HVEM on the
uninfected HVEM.sup.+ cells indicating that some of the protein was
released and then bound to HVEM. This was more pronounced with
gD-gag than with gD, and may reflect either increased secretion of
the chimeric protein or its superior binding to HVEM (FIG. 21). To
ensure that the observed transfer of gD or gD-gag from HVEM.sup.-
to HVEM.sup.+ cells was not a result of cell fusion, cells were
stained for an additional marker, the coxsackie adenovirus receptor
(CAR), expressed only by the HVEM.sup.- cell line. Uninfected
HVEM.sup.+ cells which co-stained for gD failed to express CAR thus
ruling out cell fusion.
Example 8
Expression of Antigens within gD Augments Antigen-Specific
CD8.sup.+ T Cell Responses
[0147] To determine if expression of an antigen within gD affects
stimulation of CD8.sup.+ T cells in general to epitopes presented
on gD transduced antigen presenting cells we initially performed
proliferation assays. Irradiated cells from draining lymph nodes of
mice intramuscularly (i.m.) immunized with AdC68 carrying either gD
or E7E6E5 were pulsed with low amounts of the SIINFEKL peptide and
served as antigen presenting cells for carboxyfluorescein diacetate
succinimidyl diester (CFSE)-labeled CD8.sup.+ T cells from OT-1
mice, which carry CD8.sup.+ T cells with a transgenic receptor for
SIINFEKL in the context of Kb. We had shown previously that i.m.
application of an AdC68 vector causes an accumulation of vector
transduced mature dendritic cells within draining lymph
nodes.sup.26. We thus expected that upon application of the AdC68gD
vector some of the mature dendritic cells would express gD, which
in turn may modulate the response of OT-1 derived CD8.sup.+ T cells
to their cognate antigen. As shown in FIG. 22A, OT-1 CD8.sup.+ T
cells proliferated more vigorously upon co-culture with lymph node
cells from AdC68gD injected mice than upon co-culture with cells
from AdC68E7E6E5 injected mice.
[0148] To evaluate if blockade of the HVEM inhibitory pathway
enhances adaptive immune responses in vivo, we vaccinated mice with
DNA and AdC68 vectors expressing the gD-antigen chimeric proteins
and tested T and B cell responses in comparison to those of mice
injected with vectors expressing E7, E6 and E5 or gag without gD.
Mice fail to mount detectable E7-specific CD8.sup.+ T cell
responses following vaccination with DNA or AdC68 vectors encoding
either E7E6E5 (FIG. 22A) or E7 alone. In contrast, the DNA vaccine
and the AdC68 vector expressing E7 or the fusion polypeptide of E7,
E6 and E5 within gD induce robust E7-specific CD8.sup.+ T cell
responses. Similarly, the DNA vaccine expressing the gD-gag
chimeric protein stimulate more potent gag-specific CD8.sup.+ T
cell responses compared to vectors expressing gag only (FIG. 22A).
The AdC68 vector expressing the gD-gag chimeric protein also
elicits stronger gag-specific CD8.sup.+ T cells than those
expressing gag only, which was especially pronounced at low vector
doses (FIGS. 22A, 22B). To determine the longevity of
vaccine-induced responses, E7-specific CD8.sup.+ T cells were
monitored for over a year following vaccination with the
AdC68gD-E7E6E5 vectors. CD8.sup.+ T cell responses were maintained
at stable frequencies indicating that the enhancement of the
initial primary T cell response resulted in an increase of the
memory T cell population (FIG. 22C).
Example 9
Expression of Antigens within gD Increases Antigen-Specific
Antibody Responses
[0149] It is well established that neutralizing antibodies are the
primary correlate of vaccine-induced protection against most virus
infections. LIGHT stimulation enhances both B cell proliferation
and immunoglobulin production.sup.27 and might balance inhibition
exerted by ligation of BTLA to HVEM. To analyze whether antibody
responses can be enhanced by the gD-antigen chimeric proteins, sera
of mice immunized with the AdC68 vectors expressing gag or gD-gag
were analyzed for antibodies to gag (Table 4).
TABLE-US-00004 TABLE 4 Gag-specific antibody response after
immunization with AdC68 vectors expressing gD, gag, or gD-gag.
Anti-gag antibody titer .+-. SD.sup.a (p value).sup.b Immunization
10 days 1 weeks 20 weeks 49 weeks AdC68gag 26 .+-. 8 35 .+-. 8 152
.+-. 19 6 .+-. 4 AdC68gD 3 .+-. 4 (0.007) 9 .+-. 4 (0.0037) 28 .+-.
15 (0.0004) 8 .+-. 2 (0.2573) AdC68gD-gag 287 .+-. 7 (2.6E-7) 740
.+-. 2 (6.8E-9) 1257 .+-. 21 (4.8E-6) 294 .+-. 8 (3.3E-7)
.sup.aAnti-gag Ig titers were established as the reciprocal of the
serum dilution that gave an adsorbance twice above that of the sera
from naive mice. SD-standard deviation. .sup.bp-values were
determined using one-tailed Student t test comparing titers either
from mice immunized with AdC68gD or AdC68gD-gag with titers from
mice immunized with AdC68gag.
[0150] The AdC68gag vector induces only marginal levels of
gag-specific antibodies while AdC68gD-gag vector elicits a
significantly higher response that remained detectable for at least
11 months. Antibody responses to gD, measured in parallel, were
comparable in mice vaccinated with the AdC68gD or the AdC68gD-gag
vector.
Example 10
gD-HVEM Interaction is Needed to Augment Immune Responses
[0151] To determine if enhancement of the CD8.sup.+ T cell
responses by expression of an antigen within gD requires binding of
gD to HVEM, we constructed DNA vaccines expressing the E7E6E5
sequence within two modified versions of gD; In one construct,
termed NBEFgD-E7E6E5, 7 amino acids at the N-terminus of gD, i.e.,
M11, N15, L25, Q27, L28, T29 and D30, were replaced with alanine
residues. Previous studies have shown that these 7 amino acids on
wild type gD are crucial to gD-HVEM interaction.sup.13. In a second
construct, termed SgD-E7E6E5, the tryptophan (W) in position 294 of
gD was changed to alanine (A). This modification, which is thought
to destabilize the native conformation of the gD C-terminus, was
shown to increase binding of gD306 to HVEM.sup.15. Mice immunized
with one dose of a DNA vaccine expressing NBEFgD-E7E6E5 failed to
mount detectable frequencies of E7-specific CD8.sup.+ T cells (FIG.
24A). In contrast, frequencies of E7-specific
IFN-.gamma..sup.+CD8.sup.+ T cells induced by pSgD-E7E6E5 were
higher compared to those induced by pgD-E7E6E5 (FIG. 24A), although
this difference did not reach statistical significance. To confirm
this observation we also modified the pgD-E7 DNA vaccine.sup.28,
which carries only E7 inserted into gD, by changing the tryptophan
in position 294 to alanine. This new vector, termed pSgD-E7,
stimulated significantly higher frequencies of E7-specific
CD8.sup.+ T cells compared to a plasmid vector expressing E7 within
the wild-type form of gD (FIG. 24B). Taken together, these results
demonstrate that binding to HVEM is essential for the
immunopotentiating effect of gD and that gD mutations that increase
its binding to HVEM can under some conditions further augment
CD8.sup.+ T cell responses.
Example 11
Functionality of CD8.sup.+ T Cells Induced by gD Chimeric
Proteins
[0152] Modulation of regulatory pathways may affect the
functionality of the resultant T cell responses. Phenotypes of
vaccine-induced CD8.sup.+ T cells were analyzed from mice immunized
with AdC68 vectors expressing gD-gag or gag (FIG. 25). We measured
expression of the following phenotypic markers, i.e., CD25, CD122,
CD127, CD27, CD62L, CD69, CD103, CD43, CD44, CD54, Bcl2, BTLA,
CTLA4 and PD-1 on gag-specific CD8.sup.+ T cells (FIG. 25). Most of
the markers tested (CD122, CD127, CD27, CD62L, CD69, CD103, CD43,
CD44, CD54, Bcl2, BTLA, CTLA-4 and PD-1) are modulated on
antigen-specific CD8.sup.+ T cells as compared to naive CD8.sup.+ T
cells and for most markers expression levels on CD8.sup.+ T cells
induced by gag or gD-gag are identical. CD27 is increased on a
subpopulation of gD-gag induced gag-specific CD8.sup.+ T cells,
while CTLA expression is marginally lower when compared to
CD8.sup.+ T cells induced by gag alone. Overall, although
AdC68gD-gag elicits higher frequencies of gag-specific CD8.sup.+ T
cells than AdC68gag, the phenotypic profiles of the resultant
effector cells are very similar. IFN-.gamma..sup.+CD8.sup.+ T cells
induced by gD-gag or gag respond to the same epitope when tested
against a panel of gag peptides, indicating that expression of gag
within gD does not increase the breadth of the CD8.sup.+
response.
[0153] T cell functionally was further accessed by testing if mice
vaccinated with either DNA (FIG. 26A) or AdC68 vectors (FIG. 26B)
expressing E7E6E5 with or without gD were protected against
challenge with TC-1 cells, which are lung epithelial cells derived
from C57Bl/6 mice that are transformed with v-Ha-ras and the E6 and
E7 oncoproteins of HPV-16.sup.26. Animals immunized with pgD-E7E6E5
or AdC68gD-E7E6E5 were completely protected against TC-1 tumor
progression, and protection was only seen upon vaccination with
constructs carrying gD fusion proteins. Mice vaccinated with DNA
vaccines expressing E7 or E7E6E5 within mutant forms of gD were
also tested for protection against TC-1 tumor formation (FIG. 26C).
Protection correlated with CD8.sup.+ T cell responses; mice
immunized with a vector expressing E7E6E5 within the form of gD
that can not bind to HVEM were not protected while mice immunized
with the same antigen expressed within the gDW294A variant were
fully protected. Additionally, animals immunized once with a DNA
vaccine expressing only E7 within gD developed tumors while those
that expressed E7 within the gDW294A variant were completely
protected.
[0154] Discussion of Examples 2-11
[0155] Incorporation of the antigens into the extracellular
C-terminal domain of gD markedly increases vaccine-induced
CD8.sup.+ T and B cell responses. As demonstrated in the specific
examples, above, this is especially pronounced for CD8.sup.+ T cell
responses to E7, which expresses a T cell epitope with low to
moderate affinity to H-2 Kb (He et al., virol. 270, 146-61, 2000).
A single dose of DNA vaccines or AdC68 vectors expressing the
E7E6E5 polypeptide fails to elicit detectable CD8.sup.+ T cell
responses or protective immunity to challenge with an E7-expressing
tumor cell line, while the same antigen expressed within gD by
either vector results in high and sustained frequencies of
E7-specific CD8.sup.+ T cells and complete protection against tumor
cell challenge. Gag of HIV-1 carries a high affinity epitope for
mice of the H-2.sup.d haplotype and DNA vaccines or AdC68 vectors
(Fitzgerald et al., J. Immunol. 170, 1416-22, 2003) expressing gag
induce readily detectable CD8.sup.+ T cell responses. Responses to
gag are also increased upon expression of gag within gD.
[0156] The immunopotentiating effect of gD on the response to gag
is more impressive when the gD-gag chimeric protein is delivered by
a DNA vaccine rather than by the highly immunogenic AdC68 vector.
Upon dose reduction of the AdC68 vector, results clearly
demonstrate that an induction of gag-specific CD8.sup.+ T cells can
be achieved with an approximately 100 fold lower vaccine dose than
needed for the AdC68 vector expressing gag only. This is important
because Ad vectors of the common human serotype 5 (AdHu5) when
tested in clinical trials as vaccine carriers for antigens of HIV-1
encountered dose limiting toxicity (Kresge, IAVI rep. 9, 18-20,
2005). Reactogenicity at high doses in humans is also anticipated
with the chimpanzee-origin Ad vectors such as AdC68, which was
developed to circumvent the effect of neutralizing antibodies to
common human serotypes of adenovirus. Thus, further improvement of
the immunogenicity of Ad vector vaccines that allows for a
substantial dose reduction while maintaining efficacy could lower
vaccine-related side effects, reduce the overall cost of the
vaccine and facilitate production for mass vaccination. Increased
efficacy may also lessen the need for complex prime boost regimens
that are currently being tested in clinical HIV-1 vaccine trials
but that may be unmanageable and too costly for developing
countries.
[0157] Insertion of antigens into gD does not affect the
functionality of antigen-specific CD8.sup.+ T cells; T cells
induced by the gD chimeric proteins protect against tumor challenge
in the E7 model, are phenotypically similar to those induced in
absence of gD, and efficiently differentiate into memory cells as
shown with gag-expressing AdC68 vaccines, confirming a previous
study with BTLA-deficient T cells (Krieg et al., Nat. Immunol. 8,
162-71, 2007).
[0158] Antibody responses are also augmented by expressing the
antigen within gD. LIGHT participates in B cell expansion as a
co-stimulus of CD40 and induces antibody production (Duhen et al.,
Eur. J. Immunol. 34, 3534-41, 2004). The control of LIGHT-induced B
cell activation appears to be provided by down-regulation of HVEM
following its engagement by LIGHT (Duhen et al., 2004). BTLA is
constitutively expressed on B cells and BTLA deficient mice mount
higher antibody responses compared to wild-type mice although this
effect was shown previously to be modest (Hurchla et al., J.
Immunol. 174, 3377-85, 2005). In contrast, in our vaccine model,
antibody responses were markedly enhanced upon expressing gag
within gD. While not wishing to be bound by this explanation, this
may reflect that binding of gD to HVEM augments CD4+ T cell
responses, which in turn promote activation of B cells. Alternative
pathways such as an enhancement of the co-stimulatory HVEM-LIGHT
pathway may also have contributed.
[0159] Binding of gD to HVEM is essential for augmentation of
CD8.sup.+ T cell responses to the fusion partner as vaccines
expressing antigen within a modified gD in which the HVEM binding
site had been obliterated fail to induce enhanced CD8.sup.+ T cell
responses. In the native unligated structure form of gD, the
C-terminus largely obstructs movement of the N-terminus into its
HVEM-binding conformation (Krummenacher et al., EMBO J. 24,
4144-53, 2005). According to our molecular model, insertion of
foreign sequences of certain lengths such as gag or the E7E6E5
polypeptide may effect a structural change of gD which improves its
binding to HVEM. This may not be achieved by short sequences such
as E7 alone, for which the immunogenicity and efficacy of the gD
chimeric vaccines can be improved further through a single amino
acid exchange in position 294 of gD which had been described
previously to improve binding of gD to HVEM (Krummenacher et al.,
2005).
[0160] Manipulation or disruption of negative regulatory pathways
has been shown previously to augment T cell responses. Recent
reports showed that antibody-mediated interruption of the PD1-PD-L1
pathway reverses T cell exhaustion caused by chronic infections and
allows for increased T cell proliferation (Barber et al., Nature
439, 682-87, 2006; Day et al., Nature 443, 350-54, 2006).
Manipulation of this pathway may not readily affect primary T cell
responses as PD1 requires induction by activation and is not
expressed on naive T cells (Barber et al., 2006). In contrast, low
levels of BTLA are expressed on naive T cells; the levels rapidly
increase upon T cell activation and then decline (Hurchla et al.,
2005; Han et al., J. Immunol. 172, 5931-39, 2004).
[0161] Medicinal targeting of immunoregulatory pathways can result
in immunopathology such as the devastating cytokine storms observed
upon application of anti-CD28 antibodies to human volunteers
(Suntharalingam et al., NEJM 355, 1018-28, 2006) or auto-immunity
commonly seen in genetically modified mice (Watanabe et al., Nat.
Immunol. 4, 670-79, 2003). The use of a gD-antigen chimeric protein
to enhance the immunogenicity of vaccines has the advantage that it
does not involve systemic interruption of an inhibitory pathway but
rather exerts its effects locally to the site of antigen
presentation. We confirmed the spatially limited effect of gD
experimentally by injecting two Ad vectors expressing either gD or
E7E6E5 into distant anatomical sites (left leg versus right leg)
and failed to observe enhancement of antigen-specific CD8.sup.+ T
cell responses. It has been suggested previously that targeting of
BTLA through inhibitory antibody or small molecules may enhance
vaccine immunogenicity. Results shown here suggest that such novel
adjuvants may indeed be useful; nevertheless, their effect, unlike
that of gD chimeric antigens, would be systemic and thus carry a
higher likelihood of unwanted side effects.
Example 12
In Vitro Characterization of the Vaccine Vectors
[0162] We compared levels of transgene in cells infected in vitro
with AdC68 vectors. Total RNA isolated from CHO/CAR cells infected
with 109 virus particles (vps) of AdC68gD, AdC68E7E6E5 and
AdC68gD-E7E6E5 vectors was reversed transcribed and gD, E7, E6 and
E5 specific mRNA were quantified by real-time PCR (FIG. 27A). To
minimize inherent differences in RNA isolation procedures, mRNA of
a housekeeping gene (GAPDH) was used to normalize the amount of
cDNA in each sample. The amount of gD-specific mRNA transcripts in
cells infected with AdC68gD-E7E6E5 was not statistically different
from that in cells infected with AdC68gD. The mRNA levels of E7, E6
and E5 were also similar in samples infected with AdC68gD-E7E6E5
and AdC68E7E6E5. Protein expression in cells infected with AdC68
vectors was evaluated by immunofluorescence with a monoclonal
antibody (MAb) against gD (FIG. 27B). CHO/CAR cells infected with
AdC68gD expressed gD mainly on their surface although some of the
protein could be detected within the cells. Cells infected with
AdC68E76E5 did not stain with the gD-specific MAb. In cells
infected with AdC68gD-E7E6E5, gD was mainly detected within the
cells; levels of gD on the cell surface were markedly reduced when
compared to those on cells infected with AdC68gD. The lower levels
of cell surface expression of the chimeric protein might be due to
inefficient secretion, rapid re-internalization of gD-E7E6E5 or
accelerated proteolytic degradation.
Example 13
E7-Specific CD8.sup.+ T Cell Responses Induced by AdC68 Vectors
[0163] The induction of immune responses by the gD-E7E6E5 expressed
by AdC68 and DNA vectors were described above. Here, we confirmed
our studies by testing splenocytes and PBMCs from mice immunized
with either AdC68 or DNA by ICS for frequencies of CD8.sup.+ T
cells producing IFN-.gamma. in response to a peptide expressing the
immunodominant epitope of E7 (FIGS. 28A and 28B, respectively). We
confirm that immunization with AdC68gD-E7E6E5 induced a potent
E7-specific CD8.sup.+ T cell response detectable from spleens and
blood while no specific CD8.sup.+ T cell response was found upon
immunization with AdC68gD or AdC68E7E6E5. Also, DNA vaccines
carrying either the E7E6E5 fusion protein alone or gD failed to
induce CD8.sup.+ T cells to E7, while such cells were elicited by
the DNA vaccine expressing E7E6E5 within gD.
[0164] To investigate whether the CD8.sup.+ T cell response induced
by AdC68gD-E7E6E5 could be enhanced further, AdC68gD-E7E6E5 was
tested in a prime and boost regimen with the DNA vaccine expressing
the same transgene product (FIG. 28C). Groups of mice were primed
with the DNA vaccine and then boosted with the AdC68 vector 90 days
later. In other animals the order of the vaccines was reversed. T
cell frequencies were tested from blood 14, 30 and 90 days after
priming and then on days 7, 10 and 14 after the boost. After
priming, the AdC68 vector induced higher frequencies of E7-specific
CD8.sup.+ T cells compared to the DNA vaccine. Upon booster
immunization the AdC68 prime DNA boost regimen performed poorly,
and although CD8.sup.+ T cell frequencies increased they remained
below the peak frequencies seen upon AdC68 priming. In contrast, in
the group primed with the DNA vaccine, a boost with the AdC68
vector induced a pronounced increase in E7-specific CD8.sup.+ T
cell frequencies.
[0165] Once we defined the most efficient prime boost regimen, we
tested whether the DNA vaccine or the AdC68E7E6E5 vector could
prime or boost a CD8.sup.+ T cell response to E7. Mice primed with
the DNA vaccines carrying E7E6E5 with or without gD were boosted 90
days later with either AdC68E7E6E5 or AdC68gD-E7E6E5, respectively.
See Table 5, below.
TABLE-US-00005 TABLE 5 AdC68 vectors boost after prime with DNA
vaccines. Percentage of IFN-.gamma. CD8+ cells over total CD8+
cells .sup.b Boost .sup.c Prime .sup.a No Boost AdC68E7E6E5
AdC68gD-E7E6E5 No prime 0.1 0.1 21.9 pE7E6E5 0.1 0.1 21.2
pgD-E7E6E5 0.3 2.5 47.4 .sup.a Mice were primed i.m. immunized with
100 .mu.g of DNA vaccine. .sup.b Frequencies of E7-specific CD8+ T
cells over all CD8+ cells were determined 10 days after boost.
.sup.c Mice were boosted with 5 .times. 10.sup.10 vps of AdC68
vectors 60 days after prime.
[0166] Ten days after immunization with AdC68gD-E7E6E5, E7-specific
CD8.sup.+ T-cell frequencies were similar in mice primed with
pE7E6E5 and unprimed control mice, indicating that the DNA vaccine
expressing the oncoproteins of HPV-16 was non-immunogenic. Again,
mice primed with pgDE7E6E5 and boosted with AdC68gD-E7E6E5
developed high frequencies of E7-specific IFN-.gamma.-producing
CD8.sup.+ T cells. A low but significant increase in E7-specific
CD8.sup.+ T cells was observed in mice primed with the DNA vaccine
expressing gD-E7E6E5 and then boosted with AdC68E7E6E5, indicating
that within this more immunogenic vaccine vehicle, the oncoproteins
could trigger expansion of a memory response.
[0167] To test whether the effect of gD required that the antigen
was expressed within gD or if concomitant presence of gD and the
antigen sufficed, we immunized mice with a mixture of equal doses
of AdC68gD and AdC68E7E6E5. This mixture failed to elicit a
detectable E7-specific CD8.sup.+ T cell response, suggesting that
the immunopotentiating effect of gD requires that the antigen is
expressed within gD or that the same cells that express gD have to
express the antigen.
Example 14
Dose Response Curve of the CD8.sup.+ T Cell Response to
AdC68gD-E7E6E5
[0168] In humans, Ad vectors cause dose limiting toxicity, as has
been established for E1-deleted AdHu5 vector tested as vaccine
carriers for antigens of H--I in clinical trials (Kresge, K. J et
al., 2005). Although the AdC68 vector has not yet undergone
clinical testing, we anticipate that this vector would also cause
significant toxicity if used at high doses. We therefore tested the
E7-specific CD8.sup.+ T cell response elicited by varied doses of
AdC68gD-E7E6E5 (FIG. 29A).
[0169] Mice were immunized i.m. with 1.times.10.sup.8 to
5.times.10.sup.10 vps of AdC68gD-E7E6E5. Frequencies of E7-specific
CD8.sup.+ T cells were measured 10 days later from blood and
spleens. The specific CD8.sup.+ T response declined with decreasing
doses of adenovirus vector. A response could still be detected upon
immunization with 5.times.10.sup.8 vps of the vaccine but then
became undetectable at 1.times.10.sup.8 vps. Comparable results
were obtained with other immunogens, as described above.
Example 15
AdC68gD-E7E6E5 Protects Against Challenge with an E7-Expressing
Tumor Cell Line
[0170] To formally demonstrate efficacy of AdC68gD-E7E6E5 we
conducted challenge experiments with the TC-1 cell line. To
determine the effectiveness of the AdC68 vector-induced immune
response in causing regression of already established tumors,
groups of C57Bl/6 mice were first injected with TC-1 cells then
vaccinated 5 days later with AdC68gD, AdC68E7E6E5, or
AdC68gD-E7E6E5 (FIG. 30A). Mice immunized with AdC68gD-E7E6E5
rejected the tumors and remained tumor-free for at least 60 days
after challenge. In contrast, mice immunized with AdC68gD and
AdC68E7E6E5 showed progressive growth of the TC-1 tumors.
[0171] Induction of long-term memory by a therapeutic vaccine is
advantageous, since longevity of T cells may prevent resurgence of
virus-infected cells that escape the initial wave of the immune
response. Recently, we showed that E7-specific CD8.sup.+ T response
in mice immunized with a single dose of AdC68gD-E7E6E5 was detected
over a year after immunization. We challenged mice that had been
vaccinated I year earlier with AdC68gD-E7E6E5, AdC68gD or
AdC68E7E6E5 with TC-1 cells (FIG. 30B). Mice immunized with
AdC68gD-E7E6E5 were protected against TC-1 challenge given one year
later, while mice injected with AdC68gD or AdC68E7E6E5 developed
tumors after challenge.
[0172] To determine if tumor cell challenge boosted the
vaccine-induced E7-specific CD8.sup.+ T cell response, we
investigated E7-specific CD8.sup.+ T cell response after challenge
(FIG. 31). Frequencies of E7-specific CD8.sup.+ T cells as detected
by E7/D.sup.b tetramers increased slightly in mice that were
challenged compared to those that had only been vaccinated (FIGS.
31A and 31B).
Example 16
Phenotypic Profile of E7-Specific CD8.sup.+ T Cells
[0173] We analyzed CD8.sup.+ T cells from blood, spleens and tumors
of vaccinated mice. Mice were immunized with AdC68gD, AdC68E7E6E5
or AdC68gD-E7E6E5. They were challenged 10 days later with TC-1
cells in matrigel. Lymphocytes were isolated 3 days later from
spleens, blood and tumors. A pronounced cellular infiltrate was
seen in tumors from AdC68gD-E7E6E5 vaccinated animals while
comparatively few cells could be isolated from tumors of the other
groups. We therefore isolated cells from additional mice on day 10
after challenge. At this time point there was a pronounced
infiltrate in the tumors of AdC68gD and AdC68E7E6E5 vaccinated
mice. In mice vaccinated with AdC68gD-E7E6E5, tumors had resolved
and only a few cells could be recovered. We therefore compared
cells isolated from day 3 tumors from AdC68gD-E7E6E5 vaccinated
mice with those isolated on day 10 from tumors of AdC68gD and
AdC68E7E6E5 vaccinated mice. In addition we analyzed PBMCs and
splenocytes harvested on the corresponding days.
[0174] Tumors from mice vaccinated with AdC68gD-E7E6E5 had
frequencies of E7-specific CD8.sup.+ T cells that exceeded those in
spleens or blood of the same mice, indicating a rapid recruitment
or retention of E7-specific CD8.sup.+ T cells within the tumors.
E7-specific CD8.sup.+ T cells from spleens, blood and tumors were
analyzed phenotypically for CD44, CD62L, CD27, Bcl2, BTLA, CTLA-4
and PD-1 in comparison to tetramer negative (tet-) T cells from
naive mice or mice immunized with AdC68gD or AdC68E7E6E5. The
phenotypic profiles of tet-T cells from either of these groups were
identical. E7-specific CD8.sup.+ T cells from spleens and blood
up-regulated CD44 and down-regulated CD62L, CD27, Bcl2 and BTLA.
There was no change of CTLA-4 or PD1 expression compared to
tet-CD8.sup.+ T cells. CD8.sup.+ T cells isolated from tumors
showed a distinct phenotype. Tet.sup.+CD8.sup.+ cells up-regulated
CD44 and down-regulated CD62L, CD27 and BTLA. Unlike cells from
blood and spleens, they failed to down-regulate Bcl2 and strongly
upregulated CTLA4 and PD1, two molecules involved in negative
immunoregulation.
Example 17
AdC68gD-E7E6E5 Induces an E7-Specific CD8.sup.+ T Cell Response in
E7-Transgenic Mice
[0175] Women with HPV-16-associated cancers are expected to respond
poorly to E7 as a progressing tumor would impair the adaptive
immune response directed against its antigen. To determine if
AdC68gD-E7E6E5 induces an E7-specific CD8.sup.+ T cell response in
mice that are tolerant to E7 we tested transgenic (tg) mice that
constitutively express E7 under a tissue-specific promoter in the
thyroid. These mice develop with age large goiters and thyroid
carcinomas. E7-tg mice as well as age-matched control mice were
vaccinated at one year of age with 5.times.10.sup.10 vps of
AdC68gD-E7E6E5 or as a control with AdC68gD or AdC68E7E6E5. Ten
days later lymphocytes were isolated from blood and spleens.
[0176] E7-tg mice had markedly enlarged thyroids and lymphocytes
were also isolated from their thyroids. The thyroids of wild-type
mice were comparatively small and we were unsuccessful to obtain
lymphocytes from them. T cells from individual animals were tested
for frequencies of E7-specific CD8.sup.+ T cells. Mice failed to
develop E7-specific CD8.sup.+ T cells upon vaccination with AdC68gD
or AdC68E7E6E5 (FIG. 33A). Both E7-tg and wild-type mice developed
vigorous responses in blood and spleens to E7 upon vaccination with
AdC68gD-E7E6E5. Responses were slightly higher in samples from
wild-type mice compared to those from E7-tg mice. This difference
was statistically not significant by ICS although it was
significant upon analysis by tetramer staining. E7-specific
CD8.sup.+ T cells could also be detected at high frequencies in the
thyroid of AdC68gD-E7E6E5-vaccinated E7-tg mice. E7-specific
CD8.sup.+ T cells isolated from blood and spleen of wild-type and
E7-tg mice as well as from thyroids of E7-tg mice were analyzed for
expression of phenotypic markers.
[0177] CD8.sup.+ T cells from naive E7-tg mice isolated from
spleens, blood or thyroids were analyzed for comparison. In spleen
and blood expression of CD62, CD127, BcL2, BTLA, and CTLA4 on
E7-specific CD8.sup.+ T cells from E6/E7-tg and wild-type mice were
indistinguishable. CD27, CD44 and PD-1 were slightly higher on
E7-specific CD8.sup.+ T cells isolated from blood and to a lesser
degree from spleens of E7-tg mice. E7-specific CD8.sup.+ T cells
isolated from the thyroids expressed markedly higher levels of
CD44, CD27 and PD-1 in comparison to CD8.sup.+ T cells isolated
from the thyroids of naive E7-tg mice. The other markers were
similar to those seen on E7-specific T cells from blood and
spleens. None of the CD8.sup.+ T cells isolated from the thyroids
of naive E7-tg mice stained with the tetramer to E7, phenotypes of
the vaccine-induced E7-specific CD8.sup.+ T cells could thus not be
compared to phenotypes of T cells induced by the transgenic E7
protein.
[0178] Discussion of Examples 12-17
[0179] A preventative vaccine for HPV-16 based on L1 virus like
particles, which induces neutralizing antibodies, has recently been
licensed by FDA and has been recommended for use in teenage girls
and young women. Once an infection has occurred, however,
neutralizing antibodies do not affect viral clearance nor do they
inhibit development of malignancies. Consequently, women with
humoral immunodeficiency do not have an increased susceptibility to
cervical cancer, while women with cell-mediated immunodeficiency,
such as HIV-1-infected patients, renal transplant patients or
patients with genetic T cell deficiencies, have increased incidence
rates (Moscicki et al., J Infect Dis 2004; 190:37-45; Matas et al.,
Lancet 1975; 1:883-6; Frisch et al., J Natl Cancer Inst 2000;
92:1500-10; Lowy et al., J Natl Cancer Inst 2003; 95:1648-50. This
together with extensive studies in animal models and clinical
trials (reviewed in Galloway, Lancet Infect Dis 2003; 3:469-75)
implicates a crucial role for T cells in eliminating cells
persistently infected with oncogenic types of HPVs.
[0180] The vaccine described here expressed three of the
oncoproteins of HPV-16, i.e., E7, E6 and E5 to broaden responses in
human outbred populations. Mice of the H-2b haplotype respond to a
low affinity epitope of E7, but according to our results fail to
develop CD8.sup.+ T cells to E6. Our CD8.sup.+ T cell analyses thus
focused on responses to E7. To enhance immune responses we
incorporated the oncoproteins into gD of HSV-1 which binds to the
herpes virus entry mediator (HVEM) (Montgomery et al., Cell 1996;
87:427-36; Whitbeck et al., J Virol 1997; 71:6083-93). HVEM, which
is expressed on dendritic cells, is a member of the tumor-necrosis
factor receptor (TNFR) family and interacts with LIGHT (Marsters et
al., J Biol Chem 1997; 272:14029-32; Granger & Rickert,
Cytokine Growth Factor Rev 2003; 14:289-96) and lymphotoxin-.alpha.
(LT-.alpha.) (Mauri et al., Immunity 1998; 8:21-30; Sarrias et al.,
Mol Immunol 2000; 37:665-73). Also, HVEM binds to B and T
lymphocyte attenuator (BTLA), a recently described member of the
B7-family (Gonzalez et al., Proc Natl Acad Sci USA 2005;
102:1116-21; Sedy et al., Nat Immunol 2005; 6:90-8). The HVEM-BTLA
interaction inhibits T cell activation in vitro thus defining these
molecules as part of an inhibitory pathway (Sedy et al., 2005).
Expression of BTLA is upregulated on tumor-infiltrating T cells as
was shown in cancer patients (Wang et al., Tissue Antigens 2007;
69:62-72). HSV-1 gD competes with BTLA for binding to HVEM (Compaan
et al., J Biol Chem 2005; 280:39553-61) and would thus be expected
to enhance activation of naive T cells by blockade of this negative
immunoregulatory pathway. Recently, we showed that viral antigens
expressed within gD induced CD8.sup.+ T and B cell responses to the
antigens that are far more potent than those elicited by the same
antigen expressed without gD.
[0181] Our data confirm a very strong increase of CD8.sup.+ T cell
responses to E7 expressed within HSV-1 gD. Responses to E7
expressed by the DNA vaccine or the AdC68 vector without gD were
below the level of detection, while E7 expressed within gD induced
frequencies of E7-specific CD8.sup.+ T cells of 1-3% upon DNA
vaccination and 10-24% upon Ad vector immunization. As expected,
responses were markedly higher upon vaccination with the AdC68
vector than the DNA vaccine. Most of our studies therefore focused
on the AdC68 vector vaccine. Mice vaccinated with AdC68gD-E7E6E5
were completely protected against challenge with the E7 and E6
expressing TC-1 tumor cells given shortly after vaccination or one
year later. More importantly, mice with pre-existing TC-1 tumors
rejected the tumors upon vaccination and then remained
disease-free. Vaccine-induced E7-specific CD8.sup.+ T cells rapidly
enriched within the TC-1 tumors. Phenotypically E7-specific
CD8.sup.+ T cells isolated from TC-1 tumors upregulated CD27, CTLA4
and PD-1 and down-regulated Bcl2, which may have been a consequence
of the engagement of their receptors by the tumor cells. Expression
of BTLA, which was previously reported to become upregulated on
TILs cells in humans, was not increased on E7-specific CD8.sup.+ T
cells isolated from TC-1 tumors.
[0182] Numerous studies have shown efficacy of HPV-16 E7 vaccines
against TC-1 tumors. Transplantable tumors grow very rapidly in
mice and vaccines are thus applied before or shortly after
challenge. At this early stage, T cells to the tumor antigens are
probably not yet compromised. We therefore tested AdC68gD-E7E6E5 in
E7-tg mice, which express the oncoprotein under a tissue specific
promoter within their thyroid. Listeria based E7 vaccines have been
tested in E6/E7-tg mice in which the transgenes were similarly
expressed with a bovine thyroglobulin promoter (Souders et al.,
Cancer Immun 2007; 7:2). The Listeria vaccine was shown to induce
lower frequencies of E7-specific CD8.sup.+ T cells compared to
wild-type mice and the average avidity of CD8.sup.+ T cells that
were induced was ten fold lower than those isolated from wild-type
mice. Nevertheless the Listeria vaccine could eradicate 7 day
established (5 mm) transplanted tumors in some E6/E7 transgenic
mice, albeit at lower frequency than in wild-type mice. We tested
AdC68gD-E7E6E5 in one-year-old E7-tg with thyroid hyperplasia.
AdC68gD-E7E6E5 induced an E7-specific CD8.sup.+ T cell response in
the E7-tg mice that was only slightly below that induced in
age-matched wild-type mice. The vaccine-induced E7-specific
CD8.sup.+ T cells infiltrated the thyroid. Phenotypically, the
thyroid-infiltrating vaccine-induced E7-specific CD8.sup.+ T cells
in E7-tg mice showed only minor difference to those isolated from
TC-1 tumors and these differences, i.e., an overall decrease in
CD44, CD27, Bcl2, and CTLA4 may be a reflection of difference in
sampling time rather than T cell functionality. Accordingly
E7-specific CD8.sup.+ T cells isolated from blood or spleens of
vaccinated wild-type or
[0183] E7-tg mice showed virtually identical phenotypes.
[0184] Our studies show that E7 of HPV-16 expressed as a fusion
protein together with E6 and E5 within gD induces a robust
CD8.sup.+ T cell response even in animals with developing
E7-associated malignancies. Without further studies directly
comparing the effect of similar numbers of E7-specific CD8.sup.+ T
cells induced by a vaccine expressing E7 without gD to those
induced by a vaccine expressing E7 within gD we can only speculate
that the high efficacy of the latter is linked to blockade of an
immunoinhibitory pathway. The Listeria vector used previously
induces frequencies of E7-specific CD8.sup.+ T cells that in
wild-type mice are comparable in magnitude to those induced by
AdC68gD-E7E6E5. In E6/E7-tg mice the Listeria vector induced
markedly lower frequencies of T cells (Souders et al., 2007), while
the response to AdC68gD-E7E6E5 is only slightly reduced. Although
it is tempting to speculate that this is caused by an
immunopotentiating effect of gD, other differences in the vaccine
delivery vehicles such as their interactions with antigen
presenting cells, in addition to differences between the E6/E7 and
E7 transgenic mice such as transgene copy number and E7 expression
may also have contributed to these results.
[0185] Blockade of immunoinhibitory pathways that are upregulated
in cancer patients such as regulatory T cells or PD-1 expression on
T cells has been shown pre-clinically to increase T cell responses
to tumor antigens. In these systems regulatory T cells were
depleted or rendered dysfunctional by antibodies and using a
similar approach, the PD-1 pathway was blocked by antibodies to
PD-1 or its ligand. These interventions, which have shown promise
in animal models, exert a global effect on the immune system, which
poses the risk of augmenting auto-immune reactivity. In contrast,
blockade of the BTLA-HVEM pathway only exerts a local effect on T
cells that are being activated to the antigen expressed within gD
and should thus not subject patients to unwanted immune
responses.
Example 18
Immunization of Rhesus Macaques
[0186] Two groups of rhesus macaques (4 per group) are enrolled
into the study. Animals are screened for antibodies to AdC68. Only
seronegative animals are used. Sera and peripheral PBMCs are
harvested 4 and 2 weeks before vaccination and preserved to serve
as controls.
[0187] Animals are vaccinated once with 500 .mu.g of pgag (group 1)
or pgD-gag (group 2). They are boosted 2 months later with
5.times.10.sup.10 vps of purified and quality controlled AdC68gag
(group 1) or AdC68gD-gag (group 2) vector given i.m. in saline.
Animals are bled 2, 4, and 8 weeks after priming and 2, 6 and 12
weeks after booster vaccination. PBMCs are tested for T cell
responses to a pool of gag peptides by ELISpot for IFN-.gamma. and
IL-2 and by ICS for CD3, CD8, CD4, IFN-.gamma. and IL-2 as
described (Reyes-Sandoval, et al. J. Virol. 78:7392-7399).
[0188] Sera are tested for antibodies to gag (ELISA) and
neutralizing antibodies to the vaccine carrier. The experiments are
controlled by samples collected prior to vaccination. Animals are
euthanized .about.4 months after the boost, and lymphocytes are
isolated from various compartments (spleen, blood, lymph nodes,
liver, intestine) and tested by ELISpot for T cell responses to gag
including analyses for IFN-.gamma., IL-2, TNF-.alpha. and
MIP-1.beta.. In addition they are analyzed by ICS for secretion of
IFN-.gamma. and expression of T cell markers (CD3, CD4, CD8,
included into each panel), activation (CD69, CD25, CD95, CD71) and
proliferation (Ki67) markers, markers that identify T cell subsets
(naive, central memory T cells, effector memory T cells and
effector T cells) (CD28, CD95, CD45RA, CD62L, CCR7, CD27, CD127);
chemokine and homing receptors (CCR5, CCR9, CXCR4, C11a-c, a4b7,
CD103, CD49d); and markers indicative for lytic potential (CD107,
perforin, granzyme B).
[0189] Immunophenotypical studies are performed by multicolor (7-8
colors) flow cytometry on mononuclear cells. The analyses are
restricted to compartments that that allow for isolation of
sufficient numbers of lymphocytes. The experiment is controlled
using cryopreserved splenocytes from sham-vaccinated rhesus.
[0190] It is to be understood that the embodiments of the present
invention which have been described are merely illustrative of some
of the applications of the principles of the present invention.
Numerous modifications may be made by those skilled in the art
based upon the teachings presented herein without departing from
the true spirit and scope of the invention.
Sequence CWU 1
1
37129DNAArtificial Sequenceprimer 1gctgtagggc cccatggaga tacacctac
29228DNAArtificial Sequenceprimer 2catggtggcg cctggtttct gagaacag
28329DNAArtificial Sequenceprimer 3agacatggcg cccaccaaaa gagaactgc
29433DNAArtificial Sequenceprimer 4ctccatgcgg ccgcccagct gggtttctct
acg 33532DNAArtificial Sequenceprimer 5gacaaagcgg ccgcctgcat
ccacaacatt ac 32630DNAArtificial Sequenceprimer 6acatatgggc
cctgtaatta aaaagcgtgc 30729DNAArtificial Sequenceprimer 7gggtggaagc
ttatgggaga tacacctac 29830DNAArtificial Sequenceprimer 8tggggcaagc
ttttaaatta aaaagcgtgc 30930DNAArtificial Sequenceprimer 9ccctagtcta
gaatgggggg ggctgccgcc 301033DNAArtificial Sequenceprimer
10ccctagtcta gactagtaaa acaagggctg gtg 331128DNAArtificial
Sequenceprimer 11aagaagggcg ccggtgcgag agcgtcag 281232DNAArtificial
Sequenceprimer 12aagggtggcg cccaaaactc ttgccttatg gc
321330DNAArtificial Sequenceprimer 13aagcccaagc ttatgggggg
ggctgccgcc 301433DNAArtificial Sequenceprimer 14aagcccaagc
ttctagtaaa acaagggctg gtg 331548DNAArtificial Sequenceprimer
15gaccggaagg tctttgccgc gaaagcgagc ggggtcggcc gccttgag
481647DNAArtificial Sequenceprimer 16cgctttcgcg gcaaagacct
tccggtcgcg gacgcggcgg ccgcccc 471734DNAArtificial Sequenceprimer
17caaatccaac aaaacgcgca cataggctcg atcc 341834DNAArtificial
Sequenceprimer 18gatcgacggt atgtgcgcgt ttggtgggat ttgc 34199PRTHPV
19Arg Ala His Tyr Asn Ile Val Thr Phe1 5209PRTHIV-1 20Ala Met Gln
Met Leu Lys Glu Thr Ile1 52113PRTHIV-1 21Val Val Glu Asp Glu Gly
Cys Thr Asn Leu Ser Gly Phe1 5 1022758PRTArtificial SequencegDgag
22Met Gly Gly Ala Ala Ala Arg Leu Gly Ala Val Ile Leu Phe Val Val1
5 10 15Ile Val Gly Leu His Gly Val Arg Gly Lys Tyr Ala Leu Ala Asp
Ala20 25 30Ser Leu Lys Met Ala Asp Pro Asn Arg Phe Arg Gly Lys Asp
Leu Pro35 40 45Val Leu Asp Gln Leu Thr Asp Pro Pro Gly Val Arg Arg
Val Tyr His50 55 60Ile Gln Ala Gly Leu Pro Asp Pro Phe Gln Pro Pro
Ser Leu Pro Ile65 70 75 80Thr Val Tyr Tyr Ala Val Leu Glu Arg Ala
Cys Arg Ser Val Leu Leu85 90 95Asn Ala Pro Ser Glu Ala Pro Gln Ile
Val Arg Gly Ala Ser Glu Asp100 105 110Val Arg Lys Gln Pro Tyr Asn
Leu Thr Ile Ala Trp Phe Arg Met Gly115 120 125Gly Asn Cys Ala Ile
Pro Ile Thr Val Met Glu Tyr Thr Glu Cys Ser130 135 140Tyr Asn Lys
Ser Leu Gly Ala Cys Pro Ile Arg Thr Gln Pro Arg Trp145 150 155
160Asn Tyr Tyr Asp Ser Phe Ser Ala Val Ser Glu Asp Asn Leu Gly
Phe165 170 175Leu Met His Ala Pro Ala Phe Glu Thr Ala Gly Thr Tyr
Leu Arg Leu180 185 190Val Lys Ile Asn Asp Trp Thr Glu Ile Thr Gln
Phe Ile Leu Glu His195 200 205Arg Ala Lys Gly Ser Cys Lys Tyr Ala
Leu Pro Leu Arg Ile Pro Pro210 215 220Ser Ala Cys Leu Ser Pro Gln
Ala Tyr Gln Gln Gly Val Thr Val Asp225 230 235 240Ser Ile Gly Met
Leu Pro Arg Phe Ile Pro Glu Asn Gln Arg Thr Val245 250 255Ala Val
Tyr Ser Leu Lys Ile Ala Gly Trp His Gly Pro Lys Ala Pro260 265
270Tyr Thr Ser Thr Leu Leu Pro Pro Glu Leu Ser Glu Thr Pro Asn
Ala275 280 285Thr Gln Pro Glu Leu Ala Pro Glu Asp Pro Glu Asp Ser
Ala Leu Leu290 295 300Glu Asp Pro Val Gly Thr Val Ala Pro Gly Ala
Arg Ala Ser Val Leu305 310 315 320Ser Gly Gly Glu Leu Asp Arg Trp
Glu Lys Ile Arg Leu Arg Pro Gly325 330 335Gly Lys Lys Lys Tyr Lys
Leu Lys His Ile Val Trp Ala Ser Arg Glu340 345 350Leu Glu Arg Phe
Ala Val Asn Pro Gly Leu Leu Glu Thr Ser Glu Gly355 360 365Cys Arg
Gln Ile Leu Gly Gln Leu Gln Pro Ser Leu Gln Thr Gly Ser370 375
380Glu Glu Leu Arg Ser Leu Tyr Asn Thr Val Ala Thr Leu Tyr Cys
Val385 390 395 400His Gln Arg Ile Glu Ile Lys Asp Thr Lys Glu Ala
Leu Asp Lys Ile405 410 415Glu Glu Glu Gln Asn Lys Ser Lys Lys Lys
Ala Gln Gln Ala Ala Ala420 425 430Asp Thr Gly His Ser Asn Gln Val
Ser Gln Asn Tyr Pro Ile Val Gln435 440 445Asn Ile Gln Gly Gln Met
Val His Gln Ala Ile Ser Pro Arg Thr Leu450 455 460Asn Ala Trp Val
Lys Val Val Glu Glu Lys Ala Phe Ser Pro Glu Val465 470 475 480Ile
Pro Met Phe Ser Ala Leu Ser Glu Gly Ala Thr Pro Gln Asp Leu485 490
495Asn Thr Met Leu Asn Thr Val Gly Gly His Gln Ala Ala Met Gln
Met500 505 510Leu Lys Glu Thr Ile Asn Glu Glu Ala Ala Asp Trp Asp
Arg Val His515 520 525Pro Val His Ala Gly Pro Ile Ala Pro Gly Gln
Met Arg Glu Pro Arg530 535 540Gly Ser Asp Ile Ala Gly Thr Thr Ser
Thr Leu Gln Glu Gln Ile Gly545 550 555 560Trp Met Thr Asn Asn Pro
Pro Ile Pro Val Gly Glu Ile Tyr Lys Arg565 570 575Trp Ile Ile Leu
Gly Leu Asn Lys Ile Val Arg Met Tyr Ser Pro Thr580 585 590Ser Ile
Leu Asp Ile Arg Gln Gly Pro Lys Glu Pro Phe Arg Asp Tyr595 600
605Val Asp Arg Phe Tyr Lys Thr Leu Arg Ala Glu Gln Ala Ser Gln
Glu610 615 620Val Lys Asn Trp Met Thr Glu Thr Leu Leu Val Gln Asn
Ala Asn Pro625 630 635 640Asp Cys Lys Thr Ile Leu Lys Ala Leu Gly
Pro Ala Ala Thr Leu Glu645 650 655Glu Met Met Thr Ala Cys Gln Gly
Val Gly Gly Pro Gly His Lys Ala660 665 670Arg Val Leu Ala Pro Gln
Ile Pro Pro Asn Trp His Ile Pro Ser Ile675 680 685Gln Asp Ala Ala
Thr Pro Tyr His Pro Pro Ala Thr Pro Asn Asn Met690 695 700Gly Leu
Ile Ala Gly Ala Val Gly Gly Ser Leu Leu Ala Ala Leu Val705 710 715
720Ile Cys Gly Ile Val Tyr Trp Met Arg Arg Arg Thr Gln Lys Ala
Pro725 730 735Lys Arg Ile Arg Leu Pro His Ile Arg Glu Asp Asp Gln
Pro Ser Ser740 745 750His Gln Pro Leu Phe Tyr75523732PRTArtificial
SequencegDE7E6E5 23Met Gly Gly Ala Ala Ala Arg Leu Gly Ala Val Ile
Leu Phe Val Val1 5 10 15Ile Val Gly Leu His Gly Val Arg Gly Lys Tyr
Ala Leu Ala Asp Ala20 25 30Ser Leu Lys Met Ala Asp Pro Asn Arg Phe
Arg Gly Lys Asp Leu Pro35 40 45Val Leu Asp Gln Leu Thr Asp Pro Pro
Gly Val Arg Arg Val Tyr His50 55 60Ile Gln Ala Gly Leu Pro Asp Pro
Phe Gln Pro Pro Ser Leu Pro Ile65 70 75 80Thr Val Tyr Tyr Ala Val
Leu Glu Arg Ala Cys Arg Ser Val Leu Leu85 90 95Asn Ala Pro Ser Glu
Ala Pro Gln Ile Val Arg Gly Ala Ser Glu Asp100 105 110Val Arg Lys
Gln Pro Tyr Asn Leu Thr Ile Ala Trp Phe Arg Met Gly115 120 125Gly
Asn Cys Ala Ile Pro Ile Thr Val Met Glu Tyr Thr Glu Cys Ser130 135
140Tyr Asn Lys Ser Leu Gly Ala Cys Pro Ile Arg Thr Gln Pro Arg
Trp145 150 155 160Asn Tyr Tyr Asp Ser Phe Ser Ala Val Ser Glu Asp
Asn Leu Gly Phe165 170 175Leu Met His Ala Pro Ala Phe Glu Thr Ala
Gly Thr Tyr Leu Arg Leu180 185 190Val Lys Ile Asn Asp Trp Thr Glu
Ile Thr Gln Phe Ile Leu Glu His195 200 205Arg Ala Lys Gly Ser Cys
Lys Tyr Ala Leu Pro Leu Arg Ile Pro Pro210 215 220Ser Ala Cys Leu
Ser Pro Gln Ala Tyr Gln Gln Gly Val Thr Val Asp225 230 235 240Ser
Ile Gly Met Leu Pro Arg Phe Ile Pro Glu Asn Gln Arg Thr Val245 250
255Ala Val Tyr Ser Leu Lys Ile Ala Gly Trp His Gly Pro His Gly
Asp260 265 270Thr Pro Thr Leu His Glu Tyr Met Leu Asp Leu Gln Pro
Glu Thr Thr275 280 285Asp Leu Tyr Cys Tyr Glu Gln Leu Asn Asp Ser
Ser Glu Glu Glu Asp290 295 300Glu Ile Asp Gly Pro Ala Gly Gln Ala
Glu Pro Asp Arg Ala His Tyr305 310 315 320Asn Ile Val Thr Phe Cys
Cys Lys Cys Asp Ser Thr Leu Arg Leu Cys325 330 335Val Gln Ser Thr
His Val Asp Ile Arg Thr Leu Glu Asp Leu Leu Met340 345 350Gly Thr
Leu Gly Ile Val Cys Pro Ile Cys Ser Gln Lys Pro Gly Ala355 360
365His Gln Lys Arg Thr Ala Met Phe Gln Asp Pro Gln Glu Arg Pro
Arg370 375 380Lys Leu Pro Gln Leu Cys Thr Glu Leu Gln Thr Thr Ile
His Asp Ile385 390 395 400Ile Leu Glu Cys Val Tyr Cys Lys Gln Gln
Leu Leu Arg Arg Glu Val405 410 415Tyr Asp Phe Ala Phe Arg Asp Leu
Cys Ile Val Tyr Arg Asp Gly Asn420 425 430Pro Tyr Ala Val Cys Asp
Lys Cys Leu Lys Phe Tyr Ser Lys Ile Ser435 440 445Glu Tyr Arg His
Tyr Cys Tyr Ser Leu Tyr Gly Thr Thr Leu Glu Gln450 455 460Gln Tyr
Asn Lys Pro Leu Cys Asp Leu Leu Ile Arg Cys Ile Asn Cys465 470 475
480Gln Lys Pro Leu Cys Pro Glu Glu Lys Gln Arg His Leu Asp Lys
Lys485 490 495Gln Arg Phe His Asn Ile Arg Gly Arg Trp Thr Gly Arg
Cys Met Ser500 505 510Cys Cys Arg Ser Ser Arg Thr Arg Arg Glu Thr
Gln Leu Ala Ala Ala515 520 525Cys Ile His Asn Ile Thr Gly Val Leu
Phe Ala Leu Leu Cys Val Leu530 535 540Leu Cys Val Cys Leu Leu Ile
Arg Pro Leu Leu Leu Ser Val Ser Thr545 550 555 560Tyr Thr Ser Leu
Ile Ile Leu Val Leu Leu Leu Trp Ile Thr Ala Ala565 570 575Ser Ala
Phe Arg Cys Phe Ile Val Tyr Ile Ile Phe Val Tyr Ile Pro580 585
590Leu Phe Leu Ile His Thr His Ala Arg Phe Leu Ile Thr Gly Pro
Lys595 600 605Ala Pro Tyr Thr Ser Thr Leu Leu Pro Pro Glu Leu Ser
Glu Thr Pro610 615 620Asn Ala Thr Gln Pro Glu Leu Ala Pro Glu Asp
Pro Glu Asp Ser Ala625 630 635 640Leu Leu Glu Asp Pro Val Gly Thr
Val Ala Pro Gln Ile Pro Pro Asn645 650 655Trp His Ile Pro Ser Ile
Gln Asp Ala Ala Thr Pro Tyr His Pro Pro660 665 670Ala Thr Pro Asn
Asn Met Gly Leu Ile Ala Gly Ala Val Gly Gly Ser675 680 685Leu Leu
Ala Ala Leu Val Ile Cys Gly Ile Val Tyr Trp Met Arg Arg690 695
700Arg Thr Gln Lys Ala Pro Lys Arg Ile Arg Leu Pro His Ile Arg
Glu705 710 715 720Asp Asp Gln Pro Ser Ser His Gln Pro Leu Phe
Tyr725 73024732PRTArtificial SequencegDE7E6E5 W294A 24Met Gly Gly
Ala Ala Ala Arg Leu Gly Ala Val Ile Leu Phe Val Val1 5 10 15Ile Val
Gly Leu His Gly Val Arg Gly Lys Tyr Ala Leu Ala Asp Ala20 25 30Ser
Leu Lys Met Ala Asp Pro Asn Arg Phe Arg Gly Lys Asp Leu Pro35 40
45Val Leu Asp Gln Leu Thr Asp Pro Pro Gly Val Arg Arg Val Tyr His50
55 60Ile Gln Ala Gly Leu Pro Asp Pro Phe Gln Pro Pro Ser Leu Pro
Ile65 70 75 80Thr Val Tyr Tyr Ala Val Leu Glu Arg Ala Cys Arg Ser
Val Leu Leu85 90 95Asn Ala Pro Ser Glu Ala Pro Gln Ile Val Arg Gly
Ala Ser Glu Asp100 105 110Val Arg Lys Gln Pro Tyr Asn Leu Thr Ile
Ala Trp Phe Arg Met Gly115 120 125Gly Asn Cys Ala Ile Pro Ile Thr
Val Met Glu Tyr Thr Glu Cys Ser130 135 140Tyr Asn Lys Ser Leu Gly
Ala Cys Pro Ile Arg Thr Gln Pro Arg Trp145 150 155 160Asn Tyr Tyr
Asp Ser Phe Ser Ala Val Ser Glu Asp Asn Leu Gly Phe165 170 175Leu
Met His Ala Pro Ala Phe Glu Thr Ala Gly Thr Tyr Leu Arg Leu180 185
190Val Lys Ile Asn Asp Trp Thr Glu Ile Thr Gln Phe Ile Leu Glu
His195 200 205Arg Ala Lys Gly Ser Cys Lys Tyr Ala Leu Pro Leu Arg
Ile Pro Pro210 215 220Ser Ala Cys Leu Ser Pro Gln Ala Tyr Gln Gln
Gly Val Thr Val Asp225 230 235 240Ser Ile Gly Met Leu Pro Arg Phe
Ile Pro Glu Asn Gln Arg Thr Val245 250 255Ala Val Tyr Ser Leu Lys
Ile Ala Gly Trp His Gly Pro His Gly Asp260 265 270Thr Pro Thr Leu
His Glu Tyr Met Leu Asp Leu Gln Pro Glu Thr Thr275 280 285Asp Leu
Tyr Cys Tyr Glu Gln Leu Asn Asp Ser Ser Glu Glu Glu Asp290 295
300Glu Ile Asp Gly Pro Ala Gly Gln Ala Glu Pro Asp Arg Ala His
Tyr305 310 315 320Asn Ile Val Thr Phe Cys Cys Lys Cys Asp Ser Thr
Leu Arg Leu Cys325 330 335Val Gln Ser Thr His Val Asp Ile Arg Thr
Leu Glu Asp Leu Leu Met340 345 350Gly Thr Leu Gly Ile Val Cys Pro
Ile Cys Ser Gln Lys Pro Gly Ala355 360 365His Gln Lys Arg Thr Ala
Met Phe Gln Asp Pro Gln Glu Arg Pro Arg370 375 380Lys Leu Pro Gln
Leu Cys Thr Glu Leu Gln Thr Thr Ile His Asp Ile385 390 395 400Ile
Leu Glu Cys Val Tyr Cys Lys Gln Gln Leu Leu Arg Arg Glu Val405 410
415Tyr Asp Phe Ala Phe Arg Asp Leu Cys Ile Val Tyr Arg Asp Gly
Asn420 425 430Pro Tyr Ala Val Cys Asp Lys Cys Leu Lys Phe Tyr Ser
Lys Ile Ser435 440 445Glu Tyr Arg His Tyr Cys Tyr Ser Leu Tyr Gly
Thr Thr Leu Glu Gln450 455 460Gln Tyr Asn Lys Pro Leu Cys Asp Leu
Leu Ile Arg Cys Ile Asn Cys465 470 475 480Gln Lys Pro Leu Cys Pro
Glu Glu Lys Gln Arg His Leu Asp Lys Lys485 490 495Gln Arg Phe His
Asn Ile Arg Gly Arg Trp Thr Gly Arg Cys Met Ser500 505 510Cys Cys
Arg Ser Ser Arg Thr Arg Arg Glu Thr Gln Leu Ala Ala Ala515 520
525Cys Ile His Asn Ile Thr Gly Val Leu Phe Ala Leu Leu Cys Val
Leu530 535 540Leu Cys Val Cys Leu Leu Ile Arg Pro Leu Leu Leu Ser
Val Ser Thr545 550 555 560Tyr Thr Ser Leu Ile Ile Leu Val Leu Leu
Leu Trp Ile Thr Ala Ala565 570 575Ser Ala Phe Arg Cys Phe Ile Val
Tyr Ile Ile Phe Val Tyr Ile Pro580 585 590Leu Phe Leu Ile His Thr
His Ala Arg Phe Leu Ile Thr Gly Pro Lys595 600 605Ala Pro Tyr Thr
Ser Thr Leu Leu Pro Pro Glu Leu Ser Glu Thr Pro610 615 620Asn Ala
Thr Gln Pro Glu Leu Ala Pro Glu Asp Pro Glu Asp Ser Ala625 630 635
640Leu Leu Glu Asp Pro Val Gly Thr Val Ala Pro Gln Ile Pro Pro
Asn645 650 655Ala His Ile Pro Ser Ile Gln Asp Ala Ala Thr Pro Tyr
His Pro Pro660 665 670Ala Thr Pro Asn Asn Met Gly Leu Ile Ala Gly
Ala Val Gly Gly Ser675 680 685Leu Leu Ala Ala Leu Val Ile Cys Gly
Ile Val Tyr Trp Met Arg Arg690 695 700Arg Thr Gln Lys Ala Pro Lys
Arg Ile Arg Leu Pro His Ile Arg Glu705 710 715 720Asp Asp Gln Pro
Ser Ser His Gln Pro Leu Phe Tyr725 73025394PRTArtificial SequencegD
W294A 25Met Gly Gly Ala Ala Ala Arg Leu Gly Ala Val Ile Leu Phe Val
Val1 5 10 15Ile Val Gly Leu His Gly Val Arg Gly Lys Tyr Ala Leu Ala
Asp Ala20 25 30Ser Leu Lys Met Ala Asp Pro Asn Arg Phe Arg Gly Lys
Asp Leu Pro35 40 45Val Leu Asp Gln Leu Thr Asp Pro Pro Gly Val Arg
Arg Val Tyr His50 55 60Ile Gln Ala Gly Leu Pro Asp Pro Phe Gln Pro
Pro Ser Leu Pro Ile65 70 75 80Thr Val Tyr Tyr Ala Val Leu Glu Arg
Ala Cys Arg Ser Val Leu Leu85 90
95Asn Ala Pro Ser Glu Ala Pro Gln Ile Val Arg Gly Ala Ser Glu
Asp100 105 110Val Arg Lys Gln Pro Tyr Asn Leu Thr Ile Ala Trp Phe
Arg Met Gly115 120 125Gly Asn Cys Ala Ile Pro Ile Thr Val Met Glu
Tyr Thr Glu Cys Ser130 135 140Tyr Asn Lys Ser Leu Gly Ala Cys Pro
Ile Arg Thr Gln Pro Arg Trp145 150 155 160Asn Tyr Tyr Asp Ser Phe
Ser Ala Val Ser Glu Asp Asn Leu Gly Phe165 170 175Leu Met His Ala
Pro Ala Phe Glu Thr Ala Gly Thr Tyr Leu Arg Leu180 185 190Val Lys
Ile Asn Asp Trp Thr Glu Ile Thr Gln Phe Ile Leu Glu His195 200
205Arg Ala Lys Gly Ser Cys Lys Tyr Ala Leu Pro Leu Arg Ile Pro
Pro210 215 220Ser Ala Cys Leu Ser Pro Gln Ala Tyr Gln Gln Gly Val
Thr Val Asp225 230 235 240Ser Ile Gly Met Leu Pro Arg Phe Ile Pro
Glu Asn Gln Arg Thr Val245 250 255Ala Val Tyr Ser Leu Lys Ile Ala
Gly Trp His Gly Pro Lys Ala Pro260 265 270Tyr Thr Ser Thr Leu Leu
Pro Pro Glu Leu Ser Glu Thr Pro Asn Ala275 280 285Thr Gln Pro Glu
Leu Ala Pro Glu Asp Pro Glu Asp Ser Ala Leu Leu290 295 300Glu Asp
Pro Val Gly Thr Val Ala Pro Gln Ile Pro Pro Asn Ala His305 310 315
320Ile Pro Ser Ile Gln Asp Ala Ala Thr Pro Tyr His Pro Pro Ala
Thr325 330 335Pro Asn Asn Met Gly Leu Ile Ala Gly Ala Val Gly Gly
Ser Leu Leu340 345 350Ala Ala Leu Val Ile Cys Gly Ile Val Tyr Trp
Met Arg Arg Arg Thr355 360 365Gln Lys Ala Pro Lys Arg Ile Arg Leu
Pro His Ile Arg Glu Asp Asp370 375 380Gln Pro Ser Ser His Gln Pro
Leu Phe Tyr385 390261206DNAHerpes simplex 1CDS(1)...(1185) 26atg
ggg ggg gct gcc gcc agg ttg ggg gcc gtg att ttg ttt gtc gtc 48Met
Gly Gly Ala Ala Ala Arg Leu Gly Ala Val Ile Leu Phe Val Val1 5 10
15ata gtg ggc ctc cat ggg gtc cgc ggc aaa tat gcc ttg gcg gat gcc
96Ile Val Gly Leu His Gly Val Arg Gly Lys Tyr Ala Leu Ala Asp Ala20
25 30tct ctc aag atg gcc gac ccc aat cgc ttt cgc ggc aaa gac ctt
ccg 144Ser Leu Lys Met Ala Asp Pro Asn Arg Phe Arg Gly Lys Asp Leu
Pro35 40 45gtc ctg gac cag ctg acc gac cct ccg ggg gtc cgg cgc gtg
tac cac 192Val Leu Asp Gln Leu Thr Asp Pro Pro Gly Val Arg Arg Val
Tyr His50 55 60atc cag gcg ggc cta ccg gac ccg ttc cag ccc ccc agc
ctc ccg atc 240Ile Gln Ala Gly Leu Pro Asp Pro Phe Gln Pro Pro Ser
Leu Pro Ile65 70 75 80acg gtt tac tac gcc gtg ttg gag cgc gcc tgc
cgc agc gtg ctc cta 288Thr Val Tyr Tyr Ala Val Leu Glu Arg Ala Cys
Arg Ser Val Leu Leu85 90 95aac gca ccg tcg gag gcc ccc cag att gtc
cgc ggg gcc tcc gaa gac 336Asn Ala Pro Ser Glu Ala Pro Gln Ile Val
Arg Gly Ala Ser Glu Asp100 105 110gtc cgg aaa caa ccc tac aac ctg
acc atc gct tgg ttt cgg atg gga 384Val Arg Lys Gln Pro Tyr Asn Leu
Thr Ile Ala Trp Phe Arg Met Gly115 120 125ggc aac tgt gct atc ccc
atc acg gtc atg gag tac acc gaa tgc tcc 432Gly Asn Cys Ala Ile Pro
Ile Thr Val Met Glu Tyr Thr Glu Cys Ser130 135 140tac aac aag tct
ctg ggg gcc tgt ccc atc cga acg cag ccc cgc tgg 480Tyr Asn Lys Ser
Leu Gly Ala Cys Pro Ile Arg Thr Gln Pro Arg Trp145 150 155 160aac
tac tat gac agc ttc agc gcc gtc agc gag gat aac ctg ggg ttc 528Asn
Tyr Tyr Asp Ser Phe Ser Ala Val Ser Glu Asp Asn Leu Gly Phe165 170
175ctg atg cac gcc ccc gcg ttt gag acc gcc ggc acg tac ctg cgg ctc
576Leu Met His Ala Pro Ala Phe Glu Thr Ala Gly Thr Tyr Leu Arg
Leu180 185 190gtg aag ata aac gac tgg acg gag att aca cag ttt atc
ctg gag cac 624Val Lys Ile Asn Asp Trp Thr Glu Ile Thr Gln Phe Ile
Leu Glu His195 200 205cga gcc aag ggc tcc tgt aag tac gcc ctc ccg
ctg cgc atc ccc ccg 672Arg Ala Lys Gly Ser Cys Lys Tyr Ala Leu Pro
Leu Arg Ile Pro Pro210 215 220tca gcc tgc ctg tcc ccc cag gcc tac
cag cag ggg gtg acg gtg gac 720Ser Ala Cys Leu Ser Pro Gln Ala Tyr
Gln Gln Gly Val Thr Val Asp225 230 235 240agc atc ggg atg ctg ccc
cgc ttc atc ccc gag aac cag cgc acc gtc 768Ser Ile Gly Met Leu Pro
Arg Phe Ile Pro Glu Asn Gln Arg Thr Val245 250 255gcc gta tac agc
ttg aag atc gcc ggg tgg cac ggg ccc aag gcc cca 816Ala Val Tyr Ser
Leu Lys Ile Ala Gly Trp His Gly Pro Lys Ala Pro260 265 270tac acg
agc acc ctg ctg ccc ccg gag ctg tcc gag acc ccc aac gcc 864Tyr Thr
Ser Thr Leu Leu Pro Pro Glu Leu Ser Glu Thr Pro Asn Ala275 280
285acg cag cca gaa ctc gcc ccg gaa gac ccc gag gat tcg gcc ctc ttg
912Thr Gln Pro Glu Leu Ala Pro Glu Asp Pro Glu Asp Ser Ala Leu
Leu290 295 300gag gac ccc gtg ggg acg gtg gcg ccg caa atc cca cca
aac tgg cac 960Glu Asp Pro Val Gly Thr Val Ala Pro Gln Ile Pro Pro
Asn Trp His305 310 315 320ata ccg tcg atc cag gac gcc gcg acg cct
tac cat ccc ccg gcc acc 1008Ile Pro Ser Ile Gln Asp Ala Ala Thr Pro
Tyr His Pro Pro Ala Thr325 330 335ccg aac aac atg ggc ctg atc gcc
ggc gcg gtg ggc ggc agt ctc ctg 1056Pro Asn Asn Met Gly Leu Ile Ala
Gly Ala Val Gly Gly Ser Leu Leu340 345 350gca gcc ctg gtc att tgc
gga att gtg tac tgg atg cgc cgc cgc act 1104Ala Ala Leu Val Ile Cys
Gly Ile Val Tyr Trp Met Arg Arg Arg Thr355 360 365caa aaa gcc cca
aag cgc ata cgc ctc ccc cac atc cgg gaa gac gac 1152Gln Lys Ala Pro
Lys Arg Ile Arg Leu Pro His Ile Arg Glu Asp Asp370 375 380cag ccg
tcc tcg cac cag ccc ttg ttt tac tag ataccccccc ttaatgggtg 1205Gln
Pro Ser Ser His Gln Pro Leu Phe Tyr *385 390c 120627394 PRTHerpes
simplex 1 27Met Gly Gly Ala Ala Ala Arg Leu Gly Ala Val Ile Leu Phe
Val Val1 5 10 15Ile Val Gly Leu His Gly Val Arg Gly Lys Tyr Ala Leu
Ala Asp Ala20 25 30Ser Leu Lys Met Ala Asp Pro Asn Arg Phe Arg Gly
Lys Asp Leu Pro35 40 45Val Leu Asp Gln Leu Thr Asp Pro Pro Gly Val
Arg Arg Val Tyr His50 55 60Ile Gln Ala Gly Leu Pro Asp Pro Phe Gln
Pro Pro Ser Leu Pro Ile65 70 75 80Thr Val Tyr Tyr Ala Val Leu Glu
Arg Ala Cys Arg Ser Val Leu Leu85 90 95Asn Ala Pro Ser Glu Ala Pro
Gln Ile Val Arg Gly Ala Ser Glu Asp100 105 110Val Arg Lys Gln Pro
Tyr Asn Leu Thr Ile Ala Trp Phe Arg Met Gly115 120 125Gly Asn Cys
Ala Ile Pro Ile Thr Val Met Glu Tyr Thr Glu Cys Ser130 135 140Tyr
Asn Lys Ser Leu Gly Ala Cys Pro Ile Arg Thr Gln Pro Arg Trp145 150
155 160Asn Tyr Tyr Asp Ser Phe Ser Ala Val Ser Glu Asp Asn Leu Gly
Phe165 170 175Leu Met His Ala Pro Ala Phe Glu Thr Ala Gly Thr Tyr
Leu Arg Leu180 185 190Val Lys Ile Asn Asp Trp Thr Glu Ile Thr Gln
Phe Ile Leu Glu His195 200 205Arg Ala Lys Gly Ser Cys Lys Tyr Ala
Leu Pro Leu Arg Ile Pro Pro210 215 220Ser Ala Cys Leu Ser Pro Gln
Ala Tyr Gln Gln Gly Val Thr Val Asp225 230 235 240Ser Ile Gly Met
Leu Pro Arg Phe Ile Pro Glu Asn Gln Arg Thr Val245 250 255Ala Val
Tyr Ser Leu Lys Ile Ala Gly Trp His Gly Pro Lys Ala Pro260 265
270Tyr Thr Ser Thr Leu Leu Pro Pro Glu Leu Ser Glu Thr Pro Asn
Ala275 280 285Thr Gln Pro Glu Leu Ala Pro Glu Asp Pro Glu Asp Ser
Ala Leu Leu290 295 300Glu Asp Pro Val Gly Thr Val Ala Pro Gln Ile
Pro Pro Asn Trp His305 310 315 320Ile Pro Ser Ile Gln Asp Ala Ala
Thr Pro Tyr His Pro Pro Ala Thr325 330 335Pro Asn Asn Met Gly Leu
Ile Ala Gly Ala Val Gly Gly Ser Leu Leu340 345 350Ala Ala Leu Val
Ile Cys Gly Ile Val Tyr Trp Met Arg Arg Arg Thr355 360 365Gln Lys
Ala Pro Lys Arg Ile Arg Leu Pro His Ile Arg Glu Asp Asp370 375
380Gln Pro Ser Ser His Gln Pro Leu Phe Tyr385 390281730DNAHerpes
simplex 2CDS(275)...(1456) 28agagcggtgg gggggggggg gggaagaaac
taaaaacaca tcaagcccac aaccctccac 60aaggggggtt atggcggacc caccgcacca
ccatactccg attcgaccac atatgcaacc 120aaatcacccc cagaggggaa
ggttccattt ttacgaggag gaggagtata atagagtctt 180tgtgtttaaa
acccggggtc ggtgtggtgt tcggtcataa gctgcattgc gaacgactag
240tcggccgttt ttcgtgtgca tcgcgtatca cggc atg ggg cgt ttg acc tcc
ggc 295Met Gly Arg Leu Thr Ser Gly1 5gtc ggg acg gcg gcc ctg cta
gtt gtc gcg gtg gga ctc cgc gtc gtc 343Val Gly Thr Ala Ala Leu Leu
Val Val Ala Val Gly Leu Arg Val Val10 15 20tgc gcc aaa tac gcc tta
gca gac ccc tcg ctt aag atg gcc gat ccc 391Cys Ala Lys Tyr Ala Leu
Ala Asp Pro Ser Leu Lys Met Ala Asp Pro25 30 35aat cga ttt cgc ggg
aag aac ctt ccg gtt ttg gac cag ctg acc gac 439Asn Arg Phe Arg Gly
Lys Asn Leu Pro Val Leu Asp Gln Leu Thr Asp40 45 50 55ccc ccc ggg
gtg aag cgt gtt tac cac att cag ccg agc ctg gag gac 487Pro Pro Gly
Val Lys Arg Val Tyr His Ile Gln Pro Ser Leu Glu Asp60 65 70ccg ttc
cag ccc ccc agc atc ccg atc act gtg tac tac gca gtg ctg 535Pro Phe
Gln Pro Pro Ser Ile Pro Ile Thr Val Tyr Tyr Ala Val Leu75 80 85gaa
cgt gcc tgc cgc agc gtg ctc cta cat gcc cca tcg gag gcc ccc 583Glu
Arg Ala Cys Arg Ser Val Leu Leu His Ala Pro Ser Glu Ala Pro90 95
100cag atc gtg cgc ggg gct tcg gac gag gcc cga aag cac acg tac aac
631Gln Ile Val Arg Gly Ala Ser Asp Glu Ala Arg Lys His Thr Tyr
Asn105 110 115ctg acc atc gcc tgg tat cgc atg gga gac aat tgc gct
atc ccc atc 679Leu Thr Ile Ala Trp Tyr Arg Met Gly Asp Asn Cys Ala
Ile Pro Ile120 125 130 135acg gtt atg gaa tac acc gag tgc ccc tac
aac aag tcg ttg ggg gtc 727Thr Val Met Glu Tyr Thr Glu Cys Pro Tyr
Asn Lys Ser Leu Gly Val140 145 150tgc ccc atc cga acg cag ccc cgc
tgg agc tac tat gac agc ttt agc 775Cys Pro Ile Arg Thr Gln Pro Arg
Trp Ser Tyr Tyr Asp Ser Phe Ser155 160 165gcc gtc agc gag gat aac
ctg gga ttc ctg atg cac gcc ccc gcc ttc 823Ala Val Ser Glu Asp Asn
Leu Gly Phe Leu Met His Ala Pro Ala Phe170 175 180gag acc gcg ggt
acg tac ctg cgg cta gtg aag ata aac gac tgg acg 871Glu Thr Ala Gly
Thr Tyr Leu Arg Leu Val Lys Ile Asn Asp Trp Thr185 190 195gag atc
aca caa ttt atc ctg gag cac cgg gcc cgc gcc tcc tgc aag 919Glu Ile
Thr Gln Phe Ile Leu Glu His Arg Ala Arg Ala Ser Cys Lys200 205 210
215tac gct ctc ccc ctg cgc atc ccc ccg gca gcg tgc ctc acc tcg aag
967Tyr Ala Leu Pro Leu Arg Ile Pro Pro Ala Ala Cys Leu Thr Ser
Lys220 225 230gcc tac caa cag ggc gtg acg gtc gac agc atc ggg atg
tta ccc cgc 1015Ala Tyr Gln Gln Gly Val Thr Val Asp Ser Ile Gly Met
Leu Pro Arg235 240 245ttt act ccc gaa aac cag cgc acc gtc gcc cta
tac agc tta aaa atc 1063Phe Thr Pro Glu Asn Gln Arg Thr Val Ala Leu
Tyr Ser Leu Lys Ile250 255 260gcc ggg tgg cac ggc ccc aag ccc ccg
tac acc agc acc ctg ctg ccg 1111Ala Gly Trp His Gly Pro Lys Pro Pro
Tyr Thr Ser Thr Leu Leu Pro265 270 275ccg gag ctg tcc gac acc acc
aac gcc acg caa ccc gaa ctc gtt ccg 1159Pro Glu Leu Ser Asp Thr Thr
Asn Ala Thr Gln Pro Glu Leu Val Pro280 285 290 295gaa gac ccc gag
gac tcg gcc ctc tta gag gat ccc gcc ggg acg gtg 1207Glu Asp Pro Glu
Asp Ser Ala Leu Leu Glu Asp Pro Ala Gly Thr Val300 305 310tct tcg
cag atc ccc cca aac tgg cac atc ccg tcg atc cag gac gtc 1255Ser Ser
Gln Ile Pro Pro Asn Trp His Ile Pro Ser Ile Gln Asp Val315 320
325gcg ccg cac cac gcc ccc gcc gcc cca gcc aac ccg ggc ctg atc atc
1303Ala Pro His His Ala Pro Ala Ala Pro Ala Asn Pro Gly Leu Ile
Ile330 335 340ggc gcg ctg gcc ggc agt acc ctg gcg gcg ctg gtc atc
ggc ggt att 1351Gly Ala Leu Ala Gly Ser Thr Leu Ala Ala Leu Val Ile
Gly Gly Ile345 350 355gcg ttt tgg gta cgc cgc cgg cgc tca gtg gcc
ccc aag cgc cta cgt 1399Ala Phe Trp Val Arg Arg Arg Arg Ser Val Ala
Pro Lys Arg Leu Arg360 365 370 375ctc ccc cac atc cgg gat gac gac
gcg ccc ccc tcg cac cag cca ttg 1447Leu Pro His Ile Arg Asp Asp Asp
Ala Pro Pro Ser His Gln Pro Leu380 385 390ttt tac tag aggagtttcc
ccgctcccgt gtacctctga ggcccgtgtg 1496Phe Tyr *gagggtggct ggggtattta
gggtgggact tggactccgc ataaaggagt ctcgaaggag 1556ggaaactagg
acagttcata ggccgggagc gtggggcgcg cgccgcgtgt cccgacgatt
1616agccagccgc gcccacagcc acctcgaccc ggtccgatcc gcggtatgcc
cggccgctcg 1676ctgcagggcc tggcgatcct gggcctgtgg gtctgcgcca
ccggcctggt ccgt 173029393PRTHerpes simplex 2 29Met Gly Arg Leu Thr
Ser Gly Val Gly Thr Ala Ala Leu Leu Val Val1 5 10 15Ala Val Gly Leu
Arg Val Val Cys Ala Lys Tyr Ala Leu Ala Asp Pro20 25 30Ser Leu Lys
Met Ala Asp Pro Asn Arg Phe Arg Gly Lys Asn Leu Pro35 40 45Val Leu
Asp Gln Leu Thr Asp Pro Pro Gly Val Lys Arg Val Tyr His50 55 60Ile
Gln Pro Ser Leu Glu Asp Pro Phe Gln Pro Pro Ser Ile Pro Ile65 70 75
80Thr Val Tyr Tyr Ala Val Leu Glu Arg Ala Cys Arg Ser Val Leu Leu85
90 95His Ala Pro Ser Glu Ala Pro Gln Ile Val Arg Gly Ala Ser Asp
Glu100 105 110Ala Arg Lys His Thr Tyr Asn Leu Thr Ile Ala Trp Tyr
Arg Met Gly115 120 125Asp Asn Cys Ala Ile Pro Ile Thr Val Met Glu
Tyr Thr Glu Cys Pro130 135 140Tyr Asn Lys Ser Leu Gly Val Cys Pro
Ile Arg Thr Gln Pro Arg Trp145 150 155 160Ser Tyr Tyr Asp Ser Phe
Ser Ala Val Ser Glu Asp Asn Leu Gly Phe165 170 175Leu Met His Ala
Pro Ala Phe Glu Thr Ala Gly Thr Tyr Leu Arg Leu180 185 190Val Lys
Ile Asn Asp Trp Thr Glu Ile Thr Gln Phe Ile Leu Glu His195 200
205Arg Ala Arg Ala Ser Cys Lys Tyr Ala Leu Pro Leu Arg Ile Pro
Pro210 215 220Ala Ala Cys Leu Thr Ser Lys Ala Tyr Gln Gln Gly Val
Thr Val Asp225 230 235 240Ser Ile Gly Met Leu Pro Arg Phe Thr Pro
Glu Asn Gln Arg Thr Val245 250 255Ala Leu Tyr Ser Leu Lys Ile Ala
Gly Trp His Gly Pro Lys Pro Pro260 265 270Tyr Thr Ser Thr Leu Leu
Pro Pro Glu Leu Ser Asp Thr Thr Asn Ala275 280 285Thr Gln Pro Glu
Leu Val Pro Glu Asp Pro Glu Asp Ser Ala Leu Leu290 295 300Glu Asp
Pro Ala Gly Thr Val Ser Ser Gln Ile Pro Pro Asn Trp His305 310 315
320Ile Pro Ser Ile Gln Asp Val Ala Pro His His Ala Pro Ala Ala
Pro325 330 335Ala Asn Pro Gly Leu Ile Ile Gly Ala Leu Ala Gly Ser
Thr Leu Ala340 345 350Ala Leu Val Ile Gly Gly Ile Ala Phe Trp Val
Arg Arg Arg Arg Ser355 360 365Val Ala Pro Lys Arg Leu Arg Leu Pro
His Ile Arg Asp Asp Asp Ala370 375 380Pro Pro Ser His Gln Pro Leu
Phe Tyr385 390308PRTHIV-1 8Ser Ile Ile Asn Phe Glu Lys Leu1
5312199DNAArtificial Sequencenucleotide sequence encoding gDE7E6E5
31atgggggggg ctgccgccag gttgggggcc gtgattttgt ttgtcgtcat agtgggcctc
60catggggtcc gcggcaaata tgccttggcg gatgcctctc tcaagatggc cgaccccaat
120cgctttcgcg gcaaagacct tccggtcctg gaccagctga ccgaccctcc
gggggtccgg 180cgcgtgtacc acatccaggc gggcctaccg gacccgttcc
agccccccag cctcccgatc 240acggtttact acgccgtgtt ggagcgcgcc
tgccgcagcg tgctcctaaa cgcaccgtcg 300gaggcccccc agattgtccg
cggggcctcc gaagacgtcc ggaaacaacc ctacaacctg 360accatcgctt
ggtttcggat gggaggcaac tgtgctatcc ccatcacggt catggagtac
420accgaatgct cctacaacaa gtctctgggg gcctgtccca tccgaacgca
gccccgctgg 480aactactatg acagcttcag cgccgtcagc gaggataacc
tggggttcct gatgcacgcc 540cccgcgtttg agaccgccgg cacgtacctg
cggctcgtga agataaacga ctggacggag 600attacacagt ttatcctgga
gcaccgagcc aagggctcct gtaagtacgc cctcccgctg 660cgcatccccc
cgtcagcctg cctgtccccc caggcctacc
agcagggggt gacggtggac 720agcatcggga tgctgccccg cttcatcccc
gagaaccagc gcaccgtcgc cgtatacagc 780ttgaagatcg ccgggtggca
cgggccccat ggagatacac ctacattgca tgaatatatg 840ttagatttgc
aaccagagac aactgatctc tactgttatg agcaattaaa tgacagctca
900gaggaggagg atgaaataga tggtccagct ggacaagcag aaccggacag
agcccattac 960aatattgtaa ccttttgttg caagtgtgac tctacgcttc
ggttgtgcgt acaaagcaca 1020cacgtagaca ttcgtacttt ggaagacctg
ttaatgggca cactaggaat tgtgtgcccc 1080atctgttctc agaaaccagg
cgcccaccaa aagagaactg caatgtttca ggacccacag 1140gagcgaccca
gaaagttacc acagttatgc acagagctgc aaacaactat acatgatata
1200atattagaat gtgtgtactg caagcaacag ttactgcgac gtgaggtata
tgactttgct 1260tttcgggatt tatgcatagt atatagagat gggaatccat
atgctgtatg tgataaatgt 1320ttaaagtttt attctaaaat tagtgagtat
agacattatt gttatagttt gtatggaaca 1380acattagaac agcaatacaa
caaaccgttg tgtgatttgt taattaggtg tattaactgt 1440caaaagccac
tgtgtcctga agaaaagcaa agacatctgg acaaaaagca aagattccat
1500aatataaggg gtcggtggac cggtcgatgt atgtcttgtt gcagatcatc
aagaacacgt 1560agagaaaccc agctggcggc cgcctgcatc cacaacatta
ctggcgtgct ttttgctttg 1620ctttgtgtgc ttttgtgtgt ctgcctatta
atacgtccgc tgcttttgtc tgtgtctaca 1680tacacatcat taataatatt
ggtattacta ttgtggataa cagcagcctc tgcgtttagg 1740tgttttattg
tatatattat atttgtttat ataccattat ttttaataca tacacatgca
1800cgctttttaa ttacagggcc caaggcccca tacacgagca ccctgctgcc
cccggagctg 1860tccgagaccc ccaacgccac gcagccagaa ctcgccccgg
aagaccccga ggattcggcc 1920ctcttggagg accccgtggg gacggtggcg
ccgcaaatcc caccaaactg gcacataccg 1980tcgatccagg acgccgcgac
gccttaccat cccccggcca ccccgaacaa catgggcctg 2040atcgccggcg
cggtgggcgg cagtctcctg gcagccctgg tcatttgcgg aattgtgtac
2100tggatgcgcc gccgcactca aaaagcccca aagcgcatac gcctccccca
catccgggaa 2160gacgaccagc cgtcctcgca ccagcccttg ttttactag
2199322277DNAArtificial Sequencenucleotide sequence encoding gDgag
32atgggggggg ctgccgccag gttgggggcc gtgattttgt ttgtcgtcat agtgggcctc
60catggggtcc gcggcaaata tgccttggcg gatgcctctc tcaagatggc cgaccccaat
120cgctttcgcg gcaaagacct tccggtcctg gaccagctga ccgaccctcc
gggggtccgg 180cgcgtgtacc acatccaggc gggcctaccg gacccgttcc
agccccccag cctcccgatc 240acggtttact acgccgtgtt ggagcgcgcc
tgccgcagcg tgctcctaaa cgcaccgtcg 300gaggcccccc agattgtccg
cggggcctcc gaagacgtcc ggaaacaacc ctacaacctg 360accatcgctt
ggtttcggat gggaggcaac tgtgctatcc ccatcacggt catggagtac
420accgaatgct cctacaacaa gtctctgggg gcctgtccca tccgaacgca
gccccgctgg 480aactactatg acagcttcag cgccgtcagc gaggataacc
tggggttcct gatgcacgcc 540cccgcgtttg agaccgccgg cacgtacctg
cggctcgtga agataaacga ctggacggag 600attacacagt ttatcctgga
gcaccgagcc aagggctcct gtaagtacgc cctcccgctg 660cgcatccccc
cgtcagcctg cctgtccccc caggcctacc agcagggggt gacggtggac
720agcatcggga tgctgccccg cttcatcccc gagaaccagc gcaccgtcgc
cgtatacagc 780ttgaagatcg ccgggtggca cgggcccaag gccccataca
cgagcaccct gctgcccccg 840gagctgtccg agacccccaa cgccacgcag
ccagaactcg ccccggaaga ccccgaggat 900tcggccctct tggaggaccc
cgtggggacg gtggcgccgg gtgcgagagc gtcagtatta 960agcgggggag
aattagatcg atgggaaaaa attcggttaa ggccaggggg aaagaagaag
1020tacaagctaa agcacatcgt atgggcaagc agggagctag aacgattcgc
agttaatcct 1080ggcctgttag aaacatcaga aggctgtaga caaatactgg
gacagctaca accatccctt 1140cagacaggat cagaggagct tcgatcacta
tacaacacag tagcaaccct ctattgtgtg 1200caccagcgga tcgagatcaa
ggacaccaag gaagctttag acaagataga ggaagagcaa 1260aacaagtcca
agaagaaggc ccagcaggca gcagctgaca caggacacag caatcaggtc
1320agccaaaatt accctatagt gcagaacatc caggggcaaa tggtacatca
ggccatatca 1380cctagaactt taaatgcatg ggtaaaagta gtagaagaga
aggctttcag cccagaagtg 1440atacccatgt tttcagcatt atcagaagga
gccaccccac aggacctgaa cacgatgttg 1500aacaccgtgg ggggacatca
agcagccatg caaatgttaa aagagaccat caatgaggaa 1560gctgcagatt
gggatagagt gcatccagtg catgcagggc ctattgcacc aggccagatg
1620agagaaccaa ggggaagtga catagcagga actactagta cccttcagga
acaaatagga 1680tggatgacaa ataatccacc tatcccagta ggagagatct
acaagaggtg gataatcctg 1740ggattgaaca agatcgtgag gatgtatagc
cctaccagca ttctggacat aagacaagga 1800ccaaaggaac cctttagaga
ctatgtagac cggttctata aaactctaag agctgagcaa 1860gcttcacagg
aggtaaaaaa ttggatgaca gaaaccttgt tggtccaaaa tgcgaaccca
1920gattgtaaga ccatcctgaa ggctctcggc ccagcggcta cactagaaga
aatgatgaca 1980gcatgtcagg gagtaggagg acccggccat aaggcaagag
ttttggcgcc gcaaatccca 2040ccaaactggc acataccgtc gatccaggac
gccgcgacgc cttaccatcc cccggccacc 2100ccgaacaaca tgggcctgat
cgccggcgcg gtgggcggca gtctcctggc agccctggtc 2160atttgcggaa
ttgtgtactg gatgcgccgc cgcactcaaa aagccccaaa gcgcatacgc
2220ctcccccaca tccgggaaga cgaccagccg tcctcgcacc agcccttgtt ttactag
227733758PRTArtificial Sequenceamino acid sequence of gDgagW294A
33Met Gly Gly Ala Ala Ala Arg Leu Gly Ala Val Ile Leu Phe Val Val1
5 10 15Ile Val Gly Leu His Gly Val Arg Gly Lys Tyr Ala Leu Ala Asp
Ala20 25 30Ser Leu Lys Met Ala Asp Pro Asn Arg Phe Arg Gly Lys Asp
Leu Pro35 40 45Val Leu Asp Gln Leu Thr Asp Pro Pro Gly Val Arg Arg
Val Tyr His50 55 60Ile Gln Ala Gly Leu Pro Asp Pro Phe Gln Pro Pro
Ser Leu Pro Ile65 70 75 80Thr Val Tyr Tyr Ala Val Leu Glu Arg Ala
Cys Arg Ser Val Leu Leu85 90 95Asn Ala Pro Ser Glu Ala Pro Gln Ile
Val Arg Gly Ala Ser Glu Asp100 105 110Val Arg Lys Gln Pro Tyr Asn
Leu Thr Ile Ala Trp Phe Arg Met Gly115 120 125Gly Asn Cys Ala Ile
Pro Ile Thr Val Met Glu Tyr Thr Glu Cys Ser130 135 140Tyr Asn Lys
Ser Leu Gly Ala Cys Pro Ile Arg Thr Gln Pro Arg Trp145 150 155
160Asn Tyr Tyr Asp Ser Phe Ser Ala Val Ser Glu Asp Asn Leu Gly
Phe165 170 175Leu Met His Ala Pro Ala Phe Glu Thr Ala Gly Thr Tyr
Leu Arg Leu180 185 190Val Lys Ile Asn Asp Trp Thr Glu Ile Thr Gln
Phe Ile Leu Glu His195 200 205Arg Ala Lys Gly Ser Cys Lys Tyr Ala
Leu Pro Leu Arg Ile Pro Pro210 215 220Ser Ala Cys Leu Ser Pro Gln
Ala Tyr Gln Gln Gly Val Thr Val Asp225 230 235 240Ser Ile Gly Met
Leu Pro Arg Phe Ile Pro Glu Asn Gln Arg Thr Val245 250 255Ala Val
Tyr Ser Leu Lys Ile Ala Gly Trp His Gly Pro Lys Ala Pro260 265
270Tyr Thr Ser Thr Leu Leu Pro Pro Glu Leu Ser Glu Thr Pro Asn
Ala275 280 285Thr Gln Pro Glu Leu Ala Pro Glu Asp Pro Glu Asp Ser
Ala Leu Leu290 295 300Glu Asp Pro Val Gly Thr Val Ala Pro Gly Ala
Arg Ala Ser Val Leu305 310 315 320Ser Gly Gly Glu Leu Asp Arg Trp
Glu Lys Ile Arg Leu Arg Pro Gly325 330 335Gly Lys Lys Lys Tyr Lys
Leu Lys His Ile Val Trp Ala Ser Arg Glu340 345 350Leu Glu Arg Phe
Ala Val Asn Pro Gly Leu Leu Glu Thr Ser Glu Gly355 360 365Cys Arg
Gln Ile Leu Gly Gln Leu Gln Pro Ser Leu Gln Thr Gly Ser370 375
380Glu Glu Leu Arg Ser Leu Tyr Asn Thr Val Ala Thr Leu Tyr Cys
Val385 390 395 400His Gln Arg Ile Glu Ile Lys Asp Thr Lys Glu Ala
Leu Asp Lys Ile405 410 415Glu Glu Glu Gln Asn Lys Ser Lys Lys Lys
Ala Gln Gln Ala Ala Ala420 425 430Asp Thr Gly His Ser Asn Gln Val
Ser Gln Asn Tyr Pro Ile Val Gln435 440 445Asn Ile Gln Gly Gln Met
Val His Gln Ala Ile Ser Pro Arg Thr Leu450 455 460Asn Ala Trp Val
Lys Val Val Glu Glu Lys Ala Phe Ser Pro Glu Val465 470 475 480Ile
Pro Met Phe Ser Ala Leu Ser Glu Gly Ala Thr Pro Gln Asp Leu485 490
495Asn Thr Met Leu Asn Thr Val Gly Gly His Gln Ala Ala Met Gln
Met500 505 510Leu Lys Glu Thr Ile Asn Glu Glu Ala Ala Asp Trp Asp
Arg Val His515 520 525Pro Val His Ala Gly Pro Ile Ala Pro Gly Gln
Met Arg Glu Pro Arg530 535 540Gly Ser Asp Ile Ala Gly Thr Thr Ser
Thr Leu Gln Glu Gln Ile Gly545 550 555 560Trp Met Thr Asn Asn Pro
Pro Ile Pro Val Gly Glu Ile Tyr Lys Arg565 570 575Trp Ile Ile Leu
Gly Leu Asn Lys Ile Val Arg Met Tyr Ser Pro Thr580 585 590Ser Ile
Leu Asp Ile Arg Gln Gly Pro Lys Glu Pro Phe Arg Asp Tyr595 600
605Val Asp Arg Phe Tyr Lys Thr Leu Arg Ala Glu Gln Ala Ser Gln
Glu610 615 620Val Lys Asn Trp Met Thr Glu Thr Leu Leu Val Gln Asn
Ala Asn Pro625 630 635 640Asp Cys Lys Thr Ile Leu Lys Ala Leu Gly
Pro Ala Ala Thr Leu Glu645 650 655Glu Met Met Thr Ala Cys Gln Gly
Val Gly Gly Pro Gly His Lys Ala660 665 670Arg Val Leu Ala Pro Gln
Ile Pro Pro Asn Ala His Ile Pro Ser Ile675 680 685Gln Asp Ala Ala
Thr Pro Tyr His Pro Pro Ala Thr Pro Asn Asn Met690 695 700Gly Leu
Ile Ala Gly Ala Val Gly Gly Ser Leu Leu Ala Ala Leu Val705 710 715
720Ile Cys Gly Ile Val Tyr Trp Met Arg Arg Arg Thr Gln Lys Ala
Pro725 730 735Lys Arg Ile Arg Leu Pro His Ile Arg Glu Asp Asp Gln
Pro Ser Ser740 745 750His Gln Pro Leu Phe Tyr755342277DNAArtificial
Sequencenucleotide sequence encoding gDgagW294A 34atgggggggg
ctgccgccag gttgggggcc gtgattttgt ttgtcgtcat agtgggcctc 60catggggtcc
gcggcaaata tgccttggcg gatgcctctc tcaagatggc cgaccccaat
120cgctttcgcg gcaaagacct tccggtcctg gaccagctga ccgaccctcc
gggggtccgg 180cgcgtgtacc acatccaggc gggcctaccg gacccgttcc
agccccccag cctcccgatc 240acggtttact acgccgtgtt ggagcgcgcc
tgccgcagcg tgctcctaaa cgcaccgtcg 300gaggcccccc agattgtccg
cggggcctcc gaagacgtcc ggaaacaacc ctacaacctg 360accatcgctt
ggtttcggat gggaggcaac tgtgctatcc ccatcacggt catggagtac
420accgaatgct cctacaacaa gtctctgggg gcctgtccca tccgaacgca
gccccgctgg 480aactactatg acagcttcag cgccgtcagc gaggataacc
tggggttcct gatgcacgcc 540cccgcgtttg agaccgccgg cacgtacctg
cggctcgtga agataaacga ctggacggag 600attacacagt ttatcctgga
gcaccgagcc aagggctcct gtaagtacgc cctcccgctg 660cgcatccccc
cgtcagcctg cctgtccccc caggcctacc agcagggggt gacggtggac
720agcatcggga tgctgccccg cttcatcccc gagaaccagc gcaccgtcgc
cgtatacagc 780ttgaagatcg ccgggtggca cgggcccaag gccccataca
cgagcaccct gctgcccccg 840gagctgtccg agacccccaa cgccacgcag
ccagaactcg ccccggaaga ccccgaggat 900tcggccctct tggaggaccc
cgtggggacg gtggcgccgg gtgcgagagc gtcagtatta 960agcgggggag
aattagatcg atgggaaaaa attcggttaa ggccaggggg aaagaagaag
1020tacaagctaa agcacatcgt atgggcaagc agggagctag aacgattcgc
agttaatcct 1080ggcctgttag aaacatcaga aggctgtaga caaatactgg
gacagctaca accatccctt 1140cagacaggat cagaggagct tcgatcacta
tacaacacag tagcaaccct ctattgtgtg 1200caccagcgga tcgagatcaa
ggacaccaag gaagctttag acaagataga ggaagagcaa 1260aacaagtcca
agaagaaggc ccagcaggca gcagctgaca caggacacag caatcaggtc
1320agccaaaatt accctatagt gcagaacatc caggggcaaa tggtacatca
ggccatatca 1380cctagaactt taaatgcatg ggtaaaagta gtagaagaga
aggctttcag cccagaagtg 1440atacccatgt tttcagcatt atcagaagga
gccaccccac aggacctgaa cacgatgttg 1500aacaccgtgg ggggacatca
agcagccatg caaatgttaa aagagaccat caatgaggaa 1560gctgcagatt
gggatagagt gcatccagtg catgcagggc ctattgcacc aggccagatg
1620agagaaccaa ggggaagtga catagcagga actactagta cccttcagga
acaaatagga 1680tggatgacaa ataatccacc tatcccagta ggagagatct
acaagaggtg gataatcctg 1740ggattgaaca agatcgtgag gatgtatagc
cctaccagca ttctggacat aagacaagga 1800ccaaaggaac cctttagaga
ctatgtagac cggttctata aaactctaag agctgagcaa 1860gcttcacagg
aggtaaaaaa ttggatgaca gaaaccttgt tggtccaaaa tgcgaaccca
1920gattgtaaga ccatcctgaa ggctctcggc ccagcggcta cactagaaga
aatgatgaca 1980gcatgtcagg gagtaggagg acccggccat aaggcaagag
ttttggcgcc gcaaatccca 2040ccaaacgcgc acataccgtc gatccaggac
gccgcgacgc cttaccatcc cccggccacc 2100ccgaacaaca tgggcctgat
cgccggcgcg gtgggcggca gtctcctggc agccctggtc 2160atttgcggaa
ttgtgtactg gatgcgccgc cgcactcaaa aagccccaaa gcgcatacgc
2220ctcccccaca tccgggaaga cgaccagccg tcctcgcacc agcccttgtt ttactag
2277352682DNAArtificial Sequencenucleotide sequence encoding gDNP
35atgggggggg ctgccgccag gttgggggcc gtgattttgt ttgtcgtcat agtgggcctc
60catggggtcc gcggcaaata tgccttggcg gatgcctctc tcaagatggc cgaccccaat
120cgctttcgcg gcaaagacct tccggtcctg gaccagctga ccgaccctcc
gggggtccgg 180cgcgtgtacc acatccaggc gggcctaccg gacccgttcc
agccccccag cctcccgatc 240acggtttact acgccgtgtt ggagcgcgcc
tgccgcagcg tgctcctaaa cgcaccgtcg 300gaggcccccc agattgtccg
cggggcctcc gaagacgtcc ggaaacaacc ctacaacctg 360accatcgctt
ggtttcggat gggaggcaac tgtgctatcc ccatcacggt catggagtac
420accgaatgct cctacaacaa gtctctgggg gcctgtccca tccgaacgca
gccccgctgg 480aactactatg acagcttcag cgccgtcagc gaggataacc
tggggttcct gatgcacgcc 540cccgcgtttg agaccgccgg cacgtacctg
cggctcgtga agataaacga ctggacggag 600attacacagt ttatcctgga
gcaccgagcc aagggctcct gtaagtacgc cctcccgctg 660cgcatccccc
cgtcagcctg cctgtccccc caggcctacc agcagggggt gacggtggac
720agcatcggga tgctgccccg cttcatcccc gagaaccagc gcaccgtcgc
cgtatacagc 780ttgaagatcg ccgggtggca cgggcccgcg tcccaaggca
ccaaacggtc ttacgaacag 840atggagactg atggagaacg ccagaatgcc
actgaaatca gagcatccgt cggaaaaatg 900attggtggaa ttggacgatt
ctacatccaa atgtgcaccg aactcaaact cagtgattat 960gagggacggt
tgatccaaaa cagcttaaca atagagagaa tggtgctctc tgcttttgac
1020gaaaggagaa ataaatacct ggaagaacat cccagtgcgg ggaaagatcc
taagaaaact 1080ggaggaccta tatacaggag agtaaacgga aagtggatga
gagaactcat cctttatgac 1140aaagaagaaa taaggcgaat ctggcgccaa
actaataatg gtgacgatgc aacggctggt 1200ctgactcaca tgatgatctg
gcattccaat ttgaatgatg caacttatca gaggacaaga 1260gctcttgttc
gcaccggaat ggatcccagg atgtgctctc tgatgcaagg ttcaactctc
1320cctaggaggt ctggagccgc aggtgctgca gtcaaaggag ttggaacaat
ggtgatggaa 1380ttggtcagga tgatcaaacg tgggatcaat gatcggaact
tctggagggg cgagaatgga 1440cgaaaaacaa gaattgctta tgaaagaatg
tgcaacattc tcaaagggaa atttcaaact 1500gctgcacaaa aagcaatgat
ggatcaagtg agagagagcc ggaacccagg gaatgctgag 1560ttcgaagatc
tcacttttct agcacggtct gcactcatat tgagagggtc ggttgctcac
1620aagtcctgcc tgcctgcctg tgtgtatgga cctgccgtag ccagtgggta
cgactttgaa 1680agagagggat actctctagt cggaatagac cctttcagac
tgcttcaaaa cagccaagtg 1740tacagcctaa tcagaccaaa tgagaatcca
gcacacaaga gtcaactggt gtggatggca 1800tgccattctg ccgcatttga
agatctaaga gtattaagct tcatcaaagg gacgaaggtg 1860ctcccaagag
ggaagctttc cactagagga gttcaaattg cttccaatga aaatatggat
1920gctatggaat caagtacact tgaactgaga agcaggtact gggccataag
gaccagaagt 1980gggggaaaca ccaatcaaca gagggcatct gcgggccaaa
tcagcataca acctacgttc 2040tcagtacaga gaaatctccc ttttgacaga
acaaccatta tggcagcatt caatgggaat 2100acagagggaa gaacatctga
catgaggacc gaaatcataa ggatgatgga aagtgcaaga 2160ccagaagatg
tgtctttcca ggggcgggga gtcttcgagc tctcggacga aaaggcagcg
2220agcccgatcg tgccttcctt tgacatgagt aatgaaggat cttatttctt
cggagacaat 2280gcagaggagt acgacaatgg gcccaaggcc ccatacacga
gcaccctgct gcccccggag 2340ctgtccgaga cccccaacgc cacgcagcca
gaactcgccc cggaagaccc cgaggattcg 2400gccctcttgg aggaccccgt
ggggacggtg gcgccgcaaa tcccaccaaa ctggcacata 2460ccgtcgatcc
aggacgccgc gacgccttac catcccccgg ccaccccgaa caacatgggc
2520ctgatcgccg gcgcggtggg cggcagtctc ctggcagccc tggtcatttg
cggaattgtg 2580tactggatgc gccgccgcac tcaaaaagcc ccaaagcgca
tacgcctccc ccacatccgg 2640gaagacgacc agccgtcctc gcaccagccc
ttgttttact ag 2682361185DNAArtificial Sequencenucleotide sequence
encoding gDW294A 36atgggggggg ctgccgccag gttgggggcc gtgattttgt
ttgtcgtcat agtgggcctc 60catggggtcc gcggcaaata tgccttggcg gatgcctctc
tcaagatggc cgaccccaat 120cgctttcgcg gcaaagacct tccggtcctg
gaccagctga ccgaccctcc gggggtccgg 180cgcgtgtacc acatccaggc
gggcctaccg gacccgttcc agccccccag cctcccgatc 240acggtttact
acgccgtgtt ggagcgcgcc tgccgcagcg tgctcctaaa cgcaccgtcg
300gaggcccccc agattgtccg cggggcctcc gaagacgtcc ggaaacaacc
ctacaacctg 360accatcgctt ggtttcggat gggaggcaac tgtgctatcc
ccatcacggt catggagtac 420accgaatgct cctacaacaa gtctctgggg
gcctgtccca tccgaacgca gccccgctgg 480aactactatg acagcttcag
cgccgtcagc gaggataacc tggggttcct gatgcacgcc 540cccgcgtttg
agaccgccgg cacgtacctg cggctcgtga agataaacga ctggacggag
600attacacagt ttatcctgga gcaccgagcc aagggctcct gtaagtacgc
cctcccgctg 660cgcatccccc cgtcagcctg cctgtccccc caggcctacc
agcagggggt gacggtggac 720agcatcggga tgctgccccg cttcatcccc
gagaaccagc gcaccgtcgc cgtatacagc 780ttgaagatcg ccgggtggca
cgggcccaag gccccataca cgagcaccct gctgcccccg 840gagctgtccg
agacccccaa cgccacgcag ccagaactcg ccccggaaga ccccgaggat
900tcggccctct tggaggaccc cgtggggacg gtggcgccgc aaatcccacc
aaacgcgcac 960ataccgtcga tccaggacgc cgcgacgcct taccatcccc
cggccacccc gaacaacatg 1020ggcctgatcg ccggcgcggt gggcggcagt
ctcctggcag ccctggtcat ttgcggaatt 1080gtgtactgga tgcgccgccg
cactcaaaaa gccccaaagc gcatacgcct cccccacatc 1140cgggaagacg
accagccgtc ctcgcaccag cccttgtttt actag 1185372199DNAArtificial
Sequencenucleotide sequence encoding NBEF gDE7E6E5 37atgggggggg
ctgccgccag gttgggggcc gtgattttgt ttgtcgtcat agtgggcctc 60catggggtcc
gcggcaaata tgccttggcg gatgcctctc tcaaggcggc cgaccccgct
120cgctttcgcg gcaaagacct tccggtcgcg gacgcggcgg ccgcccctcc
gggggtccgg 180cgcgtgtacc acatccaggc gggcctaccg gacccgttcc
agccccccag cctcccgatc 240acggtttact acgccgtgtt ggagcgcgcc
tgccgcagcg tgctcctaaa cgcaccgtcg 300gaggcccccc agattgtccg
cggggcctcc gaagacgtcc ggaaacaacc ctacaacctg 360accatcgctt
ggtttcggat gggaggcaac tgtgctatcc ccatcacggt catggagtac
420accgaatgct
cctacaacaa gtctctgggg gcctgtccca tccgaacgca gccccgctgg
480aactactatg acagcttcag cgccgtcagc gaggataacc tggggttcct
gatgcacgcc 540cccgcgtttg agaccgccgg cacgtacctg cggctcgtga
agataaacga ctggacggag 600attacacagt ttatcctgga gcaccgagcc
aagggctcct gtaagtacgc cctcccgctg 660cgcatccccc cgtcagcctg
cctgtccccc caggcctacc agcagggggt gacggtggac 720agcatcggga
tgctgccccg cttcatcccc gagaaccagc gcaccgtcgc cgtatacagc
780ttgaagatcg ccgggtggca cgggccccat ggagatacac ctacattgca
tgaatatatg 840ttagatttgc aaccagagac aactgatctc tactgttatg
agcaattaaa tgacagctca 900gaggaggagg atgaaataga tggtccagct
ggacaagcag aaccggacag agcccattac 960aatattgtaa ccttttgttg
caagtgtgac tctacgcttc ggttgtgcgt acaaagcaca 1020cacgtagaca
ttcgtacttt ggaagacctg ttaatgggca cactaggaat tgtgtgcccc
1080atctgttctc agaaaccagg cgcccaccaa aagagaactg caatgtttca
ggacccacag 1140gagcgaccca gaaagttacc acagttatgc acagagctgc
aaacaactat acatgatata 1200atattagaat gtgtgtactg caagcaacag
ttactgcgac gtgaggtata tgactttgct 1260tttcgggatt tatgcatagt
atatagagat gggaatccat atgctgtatg tgataaatgt 1320ttaaagtttt
attctaaaat tagtgagtat agacattatt gttatagttt gtatggaaca
1380acattagaac agcaatacaa caaaccgttg tgtgatttgt taattaggtg
tattaactgt 1440caaaagccac tgtgtcctga agaaaagcaa agacatctgg
acaaaaagca aagattccat 1500aatataaggg gtcggtggac cggtcgatgt
atgtcttgtt gcagatcatc aagaacacgt 1560agagaaaccc agctggcggc
cgcctgcatc cacaacatta ctggcgtgct ttttgctttg 1620ctttgtgtgc
ttttgtgtgt ctgcctatta atacgtccgc tgcttttgtc tgtgtctaca
1680tacacatcat taataatatt ggtattacta ttgtggataa cagcagcctc
tgcgtttagg 1740tgttttattg tatatattat atttgtttat ataccattat
ttttaataca tacacatgca 1800cgctttttaa ttacagggcc caaggcccca
tacacgagca ccctgctgcc cccggagctg 1860tccgagaccc ccaacgccac
gcagccagaa ctcgccccgg aagaccccga ggattcggcc 1920ctcttggagg
accccgtggg gacggtggcg ccgcaaatcc caccaaactg gcacataccg
1980tcgatccagg acgccgcgac gccttaccat cccccggcca ccccgaacaa
catgggcctg 2040atcgccggcg cggtgggcgg cagtctcctg gcagccctgg
tcatttgcgg aattgtgtac 2100tggatgcgcc gccgcactca aaaagcccca
aagcgcatac gcctccccca catccgggaa 2160gacgaccagc cgtcctcgca
ccagcccttg ttttactag 2199
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