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Comprehensive search for HLA Class II-restricted peptides in breast cancer neoantigens

Research Project

Project/Area Number 21K08614
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55010:General surgery and pediatric surgery-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Bando Hiroko  筑波大学, 医学医療系, 准教授 (00400680)

Co-Investigator(Kenkyū-buntansha) 宮寺 浩子  筑波大学, 医学医療系, 助教 (40361464)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsNeoantigen / HLA / 乳癌 / T細胞エピトープ / neoantigen / HLA class II / 抗腫瘍免疫 / public neoantigen / HLA class II拘束性ペプチド / HLA Class II拘束性ペプ チド / MHC-density assay
Outline of Research at the Start

(令和3年度)先行研究で同定したネオアンチゲンと患者のHLA Class IIアレルを用いて結合解析を行い、T細胞エピトープ判別条件を明らかにする。
(令和4,5年度)乳癌で頻度の高いミスセンス変異を選出し主要なHLA Class IIアレルと選出したペプチドの結合アッセイを網羅的に行い、Class IIに提示されうるpublic neoantigenのペプチド配列の大規模なデータセットを作成する。

Outline of Final Research Achievements

The importance of HLA class II and helper T cells in anti-tumor immunity has been well recognized, but not fully investigated whether there are neoantigens in hormone receptor positive (HR+) breast cancer with poor prognosis. To find a potential target neoantigens, we measured the interaction of HLA class II and public neoantigens commonly found in HR+ breast cancer. We selected frequent missense mutations in ESR1 and PIK3CA from the Catalogue of Somatic Mutations in Cancer (COSMIC) database and searched for peptides that can be presented by the common HLA class II alleles in Japanese, using in silico HLA-peptide binding prediction (NetMHCIIpan4.0). For the selected peptides, we measured their interaction with HLA class II. Among the candidate peptides, we identified seven ESR1 and ten PIK3CA mutated peptides that could be presented by HLA class II. These findings indicate a possibility that these peptides would be candidates for peptide-vaccine.

Academic Significance and Societal Importance of the Research Achievements

がん免疫療法の治療効果は、遺伝子変異が多く免疫原性の高いがんに対して効果的であることが知られているが、近年では免疫原性の低い固形がん領域でも、ネオアンチゲンワクチン併用により効果が高まることが報告され、今まで対象とされなかった癌腫においても効果の高い免疫療法の開発が期待されている。乳癌全体の約7割を占めるホルモン受容体陽性乳癌において免疫原性を示すネオアンチゲンの情報は十分に得られていないことから、本研究では我々はそのような変異を含む領域を見出すことを目的に研究を行った。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (3 results)

All 2023 2022

All Presentation (3 results)

  • [Presentation] HLA class II拘束性T細胞エピトープとなりうる乳癌のpublic neoantigenの探索2023

    • Author(s)
      安藤有佳里、宮寺浩子、橋本幸枝、原尚人、坂東裕子、野口恵美子
    • Organizer
      第27回 日本がん免疫学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Exploration of public neoantigen in breast cancer that could be an HLA class II restricted T cell epitope2023

    • Author(s)
      Yukari Ando, Hiroko Miyadera, Sachie Hashimoto, Hisato Hara, Hiroko Bando, Emiko Noguchi
    • Organizer
      第81回日本癌学会学術総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] MHC density assay for public neoantigen in breast cancer and HLA class II2022

    • Author(s)
      Yukari Ando、Hiroko Miyadera、Sachie Hashimoto、Hiroko Bando、Emiko Noguchi
    • Organizer
      第81回 日本癌学会学術総会
    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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