TY - JOUR
T1 - Identification of human leucocyte antigen (HLA)-A*0201-restricted cytotoxic T lymphocyte epitopes derived from HLA-DOβ as a novel target for multiple myeloma
AU - Kang, Yoon Joong
AU - Zeng, Wanyong
AU - Song, Weihua
AU - Reinhold, Bruce
AU - Choi, Jaewon
AU - Brusic, Vladimir
AU - Yamashita, Takuto
AU - Munshi, Aditya
AU - Li, Cheng
AU - Minvielle, Stephane
AU - Anderson, Kenneth C.
AU - Munshi, Nikhil
AU - Reinherz, Ellis L.
AU - Sasada, Tetsuro
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2013/11
Y1 - 2013/11
N2 - Despite the recent development of effective therapeutic agents against multiple myeloma (MM), new therapeutic approaches, including immunotherapies, remain to be developed. Here we identified novel human leucocyte antigen (HLA)-A*0201 (HLA-A2)-restricted cytotoxic T lymphocyte (CTL) epitopes from a B cell specific molecule HLA-DOβ (DOB) as a potential target for MM. By DNA microarray analysis, the HLA-DOB expression in MM cells was significantly higher than that in normal plasma cells. Twenty-five peptides were predicted to bind to HLA-A2 from the amino acid sequence of HLA-DOB. When screened for the immunogenicity in HLA-A2-transgenic mice immunized with HLA-DOB cDNA, 4 peptides were substantially immunogenic. By mass spectrometry analysis of peptides eluted from HLA-A2-immunoprecipitates of MM cell lines, only two epitopes, HLA-DOB232-240 (FLLGLIFLL) and HLA-DOB185-193 (VMLEMTPEL), were confirmed for their physical presence on cell surface. When healthy donor blood was repeatedly stimulated in vitro with these two peptides and assessed by antigen-specific γ-interferon secretion, HLA-DOB232-240 was more immunogenic than HLA-DOB185-193. Additionally, the HLA-DOB232-240-specific CTLs, but not the HLA-DOB185-193-specific CTLs, displayed an major histocompatibility complex class I-restricted reactivity against MM cell lines expressing both HLA-A2 and HLA-DOB. Taken together, based on the physical presence on tumour cell surface and high immunogenicity, HLA-DOB232-240 might be useful for developing a novel immunotherapy against MM.
AB - Despite the recent development of effective therapeutic agents against multiple myeloma (MM), new therapeutic approaches, including immunotherapies, remain to be developed. Here we identified novel human leucocyte antigen (HLA)-A*0201 (HLA-A2)-restricted cytotoxic T lymphocyte (CTL) epitopes from a B cell specific molecule HLA-DOβ (DOB) as a potential target for MM. By DNA microarray analysis, the HLA-DOB expression in MM cells was significantly higher than that in normal plasma cells. Twenty-five peptides were predicted to bind to HLA-A2 from the amino acid sequence of HLA-DOB. When screened for the immunogenicity in HLA-A2-transgenic mice immunized with HLA-DOB cDNA, 4 peptides were substantially immunogenic. By mass spectrometry analysis of peptides eluted from HLA-A2-immunoprecipitates of MM cell lines, only two epitopes, HLA-DOB232-240 (FLLGLIFLL) and HLA-DOB185-193 (VMLEMTPEL), were confirmed for their physical presence on cell surface. When healthy donor blood was repeatedly stimulated in vitro with these two peptides and assessed by antigen-specific γ-interferon secretion, HLA-DOB232-240 was more immunogenic than HLA-DOB185-193. Additionally, the HLA-DOB232-240-specific CTLs, but not the HLA-DOB185-193-specific CTLs, displayed an major histocompatibility complex class I-restricted reactivity against MM cell lines expressing both HLA-A2 and HLA-DOB. Taken together, based on the physical presence on tumour cell surface and high immunogenicity, HLA-DOB232-240 might be useful for developing a novel immunotherapy against MM.
KW - Cytotoxic T lymphocyte
KW - DNA microarray
KW - HLA-DOβ
KW - Multiple myeloma
KW - T cell epitope
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U2 - 10.1111/bjh.12544
DO - 10.1111/bjh.12544
M3 - Article
C2 - 24032635
AN - SCOPUS:84885424079
VL - 163
SP - 343
EP - 351
JO - British Journal of Haematology
JF - British Journal of Haematology
SN - 0007-1048
IS - 3
ER -