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Antitumor immunity mediated by HLA-E in hepatocellular carcinoma

Research Project

Project/Area Number 20K22760
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0803:Pathology, infection/immunology, and related fields
Research InstitutionKanazawa University

Principal Investigator

Nakagawa Hidetoshi  金沢大学, 医学系, 助教 (90743469)

Project Period (FY) 2020-09-11 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsHLA-E / 肝細胞癌 / がん免疫 / 非古典的主要組織適応抗原複合体 / 免疫 / 肝がん / ペプチドーム / T細胞
Outline of Research at the Start

本研究では実際の肝がん組織にどの程度の頻度・強度でどのタイプのHLA-Eが発現しているかを検証し、臨床病態との関連を検証する。さらに肝がんに特異的に発現しTCRで認識されるエピトープペプチドを同定し、ペプチドワクチンやTCR遺伝子治療の可能性を模索する。これまで注目されてこなかったHLA-Eに着目し、NKG2Aを介したがん免疫抑制からTCRを介した抗腫瘍効果へのコンバージョンを試みる。特筆すべき点としてHLA-Eは他のHLAとは異なり多型性に極めて乏しいため、開発した治療がHLAハプロタイプに依存しないユニバーサルワクチン・ユニバーサルTCR遺伝子治療となりうる。

Outline of Final Research Achievements

This study has identified and uncovered aspects of the immune response mediated by HLA-E, which had not been fully elucidated until now. Examination of surgical specimens revealed HLA-E expression in some hepatocellular carcinoma cells, but primarily in tumor-infiltrating immune cells. Furthermore, in the examination of peripheral blood, HLA-E was expressed in immune cells in general. Further analysis led to the identification of candidate T cell receptors that recognize HLA-E.
In the examination of cases of immunotherapy for liver cancer, it was observed that when the HLA-E haplotype is 0101/0101, there is a trend towards a shorter progression-free survival period. These results suggest that the interaction between HLA-E and a specific group of immune cells may affect the progression of liver cancer and the response to immunotherapy.

Academic Significance and Societal Importance of the Research Achievements

これまで十分に解明されていなかったHLA-Eを介した免疫応答を解析することで、がん治療のみならず、自己免疫疾患の理解の新たな側面を明らかにした。本研究で明らかになったHLA-Eハプロタイプとがん免疫療法の治療効果の関連や、HLA-Eを認識するCD8陽性T細胞の存在、またそのT細胞受容体の同定から、免疫制御の観点からHLA-Eが重要な役割を担っていると考えられた。今後の展開として得られたT細胞受容体の機能解析をすすめ、新たな免疫療法のツールとして利用することを目指す。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (3 results)

All 2022 2021

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Peptide vaccine-treated, long-term surviving cancer patients harbor self-renewing tumor-specific CD8+ T cells2022

    • Author(s)
      Mizukoshi Eishiro、Nakagawa Hidetoshi、Tamai Toshikatsu、Kitahara Masaaki、Fushimi Kazumi、Nio Kouki、Terashima Takeshi、Iida Noriho、Arai Kuniaki、Yamashita Tatsuya、Yamashita Taro、Sakai Yoshio、Honda Masao、Kaneko Shuichi
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 3123-3123

    • DOI

      10.1038/s41467-022-30861-z

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 進行肝細胞癌に対する ラジオ波焼灼療法先行アテゾズマブ・ベバシズマブ療法 の忍容性の検討と免疫学的解析2022

    • Author(s)
      中河 秀俊、山下 竜也、金子 周一
    • Organizer
      第108回日本消化器病学会総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] TUMOR-SPECIFIC T CELLS INDUCED BY PEPTIDE VACCINES CONTRIBUTE TO PROLONGED SURVIVALS IN HEPATOCELLULAR CARCINOMA PATIENTS2021

    • Author(s)
      Hidetoshi Nakagawa, Eishiro Mizukoshi, Shuichi Kaneko
    • Organizer
      AASLD2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2020-09-29   Modified: 2024-01-30  

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