The multi-epitope approach for immunotherapy for cancer: Identification of several CTL epitopes from various tumor-associated antigens expressed on solid epithelial tumors

被引:189
作者
Kawashima, I
Hudson, SJ
Tsai, V
Southwood, S
Takesako, K
Appella, E
Sette, A
Celis, E
机构
[1] Cytel Corp, San Diego, CA 92121 USA
[2] Takara Shuzo Co Ltd, Biotechnol Res Labs, Shiga, Japan
[3] NCI, Cell Biol Lab, Bethesda, MD 20892 USA
关键词
D O I
10.1016/S0198-8859(97)00255-3
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
One approach to development of specific cancer immunotherapy relies on the induction of cytotoxic T lymphocytes (CTL) specific for tumor-associated antigens (TAA). Induction of TAA,specific CTL could be used towards the eradication of established rumors, or to prevent their dissemination or recurrence after primary treatment. The present study identifies a set of CTL epitopes from TAA frequently found on solid epithelial tumors such as breast, lung and gastro-intestinal tumors. Specifically, HLA-A2.1 binding peptides from the MAGE2, MAGE3, HER-2/neu and CEA antigens were rested for their capacity to elicit in vitro anti-tumor CTL using lymphocytes from normal volunteers and autologous dendritic cells as antigen-presenting cells. A total of 6 new epitopes (MAGE2[10(157)], MAGE3[9(112)],CEA[9(691)], CEA[9(24)], HER2[9(435)] and HER2[9(5)]) were identified which were capable of specifically recognizing tumor cell lines expressing HLA-A2.1 and the corresponding TAA. In one case (CEA[9(24)]), induction of vigorous anti-rumor CTL responses required epitope engineering to increase HLA-A2.1 binding affinity. Finally, most of the newly identified epitopes (5 our of 6) were found to be highly crossreactive with other common HLA alleles of the A2 supertype (A2.2, A2.3, A2.6 and A6802), thus demonstrating their potential in providing broad and non-ethnically biased population coverage. The results are discussed in the context of the development of multi-epitope-based therapies with broad applicability for patients suffering from commonly found rumors. (C) American Society for Histocompatibility and Immunogenetics, 1998. Published by Elsevier Science Inc.
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页码:1 / 14
页数:14
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