Landscape mapping of shared antigenic epitopes and their cognate tcrs of tumor-infiltrating T lymphocytes in Melanoma

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 A. GhazarianTrevor J. Pugh, Marcus O. Butler, Tak W. Mak, Pamela S. Ohashi, Naoto Hirano

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


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.

Original languageEnglish
Publication statusPublished - 2020 Apr
Externally publishedYes

ASJC Scopus subject areas

  • General Neuroscience
  • General Biochemistry,Genetics and Molecular Biology
  • General Immunology and Microbiology


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