Landscape mapping of shared antigenic epitopes and their cognate TCRs of tumor-infiltrating T lymphocytes in melanoma
oleh: Kenji Murata, Munehide Nakatsugawa, Muhammed A Rahman, Linh T Nguyen, Douglas G Millar, David T Mulder, Kenji Sugata, Hiroshi Saijo, Yukiko Matsunaga, Yuki Kagoya, Tingxi Guo, Mark Anczurowski, Chung-Hsi Wang, Brian D Burt, Dalam Ly, Kayoko Saso, Alexandra Easson, David P Goldstein, Michael Reedijk, Danny Ghazarian, Trevor J Pugh, Marcus O Butler, Tak W Mak, Pamela S Ohashi, Naoto Hirano
| Format: | Article |
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| Diterbitkan: | eLife Sciences Publications Ltd 2020-04-01 |
Deskripsi
HLA-restricted T cell responses can induce antitumor effects in cancer patients. Previous human T cell research has largely focused on the few HLA alleles prevalent in a subset of ethnic groups. Here, using a panel of newly developed peptide-exchangeable peptide/HLA multimers and artificial antigen-presenting cells for 25 different class I alleles and greater than 800 peptides, we systematically and comprehensively mapped shared antigenic epitopes recognized by tumor-infiltrating T lymphocytes (TILs) from eight melanoma patients for all their class I alleles. We were able to determine the specificity, on average, of 12.2% of the TILs recognizing a mean of 3.1 shared antigen-derived epitopes across HLA-A, B, and C. Furthermore, we isolated a number of cognate T cell receptor genes with tumor reactivity. Our novel strategy allows for a more complete examination of the immune response and development of novel cancer immunotherapy not limited by HLA allele prevalence or tumor mutation burden.