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Analysis of immunosuppression by ER stress in cancer microenvironments

Research Project

Project/Area Number 21H02785
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionKyoto University

Principal Investigator

Yaguchi Tomonori  京都大学, 医学研究科, 特定講師 (40424163)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2023: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2022: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2021: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywords腫瘍免疫 / ERストレス / がん免疫治療 / がん免疫療法
Outline of Research at the Start

研究代表者は、これまでの研究で、がん免疫療法の不応例の原因となる免疫抑制機構に脂質代謝異常が関与することを見出した。そのメカニズムの一つとして、ER(小胞体)ストレスが関与し、それは加齢による影響を受けている可能性が示唆された。そこで、本研究では、臨床検体とマウス腫瘍モデルの両方を用いて、ERストレスとがん免疫応答の関係を、代謝や加齢による影響を考慮しつつ解析し、その細胞分子機構を解明する。さらに、得られた知見に基づいてERストレス制御法を開発することにより、免疫チェックポイント阻害治療におけるバイオマーカー同定やPD-1/PDL1阻害を基軸とした効果的な複合がん免疫療法開発を目指す。

Outline of Final Research Achievements

Immunosuppression is the main cause of resistance to immune checkpoint inhibitors. In this study, we examined the role of endoplasmic reticulum (ER) stress in T cells in this immunosuppression. Inhibitors of stearoyl-CoA desaturase 1 (SCD-1), an enzyme involved in fatty acid metabolism, reduced ER stress in T cells and enhanced the therapeutic effect of anti-PD-1 antibody through enhancing T cells function. (Kato et al. J Immunother Cancer. 2022). Furthermore, we found that a metabolite, which are reported to decrease with aging, binds to a protein involved in ER stress and enhances its function. These findings suggest that ER stress increase with aging, leading to the dysfunction of T cells.

Academic Significance and Societal Importance of the Research Achievements

ERストレスと抗腫瘍免疫応答の関連に関して、SCD-1の関与、老化の関与が明らかとなり、ERストレスの制御で、免疫チェックポイント阻害薬(ICI)の効果を増強できることが分かった。本研究の成果は、基礎医学的なヒトがん免疫病態の解明に貢献できるだけでなく、ICIの課題である症例選択のためのバイオマーカー開発や治療改良法の開発など、臨床医学的にも多大な貢献ができ、波及効果が高い研究と考えられる。

Report

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

    (8 results)

All 2024 2023 2022 2021

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (5 results) (of which Invited: 3 results)

  • [Journal Article] Insights from a 30-year journey: function, regulation and therapeutic modulation of PD12023

    • Author(s)
      Chamoto Kenji, Yaguchi Tomonori, Tajima Masaki, Honjo Tasuku
    • Journal Title

      Nature Reviews Immunology

      Volume: - Issue: 10 Pages: 682-695

    • DOI

      10.1038/s41577-023-00867-9

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Programmed cell death-1 blockade therapy in melanoma: Resistance mechanisms and combination strategies.2023

    • Author(s)
      Zou Y, Yaguchi T
    • Journal Title

      Experimental Dermatology

      Volume: 32 Issue: 3 Pages: 264-275

    • DOI

      10.1111/exd.14750

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Inhibition of stearoyl-CoA desaturase 1 (SCD1) enhances the antitumor T cell response through regulating β-catenin signaling in cancer cells and ER stress in T cells and synergizes with anti-PD-1 antibody2022

    • Author(s)
      Yuki Katoh, Tomonori Yaguchi, Akiko Kubo, Takashi Iwata, Kenji Morii, Daiki Kato, Shigeki Ohta, Ryosuke Satomi, Yasuhiro Yamamoto, Yoshitaka Oyamada, Kota Ouchi, Shin Takahashi, Chikashi Ishioka, Ryo Matoba, Makoto Suematsu, Yutaka Kawakami
    • Journal Title

      J Immunotherapy Cancer

      Volume: 10(7) Issue: 7 Pages: e004616-e004616

    • DOI

      10.1136/jitc-2022-004616

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Analysis of intertumoral and intratumoral heterogeneity based on molecular subtypes in clear cell renal cell carcinoma reveals immune suppressive phenotype of the angiogenesis-related immune signatures.2024

    • Author(s)
      Katsuhiro Itoh, Tomonori Yaguchi, Kenji Chamoto, Takayuki Sumiyoshi, Yuki Kita, Takashi Kobayashi, Tasuku Honjo.
    • Organizer
      第52回日本免疫学会学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 淡明細胞型腎細胞癌における分子サブタイプに特徴的な免疫微小環境の解析.2023

    • Author(s)
      伊藤克弘、谷口智憲、茶本健司、住吉崇幸、北悠希、小林恭、本庶佑
    • Organizer
      第27回日本がん免疫学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 免疫賦活療法の功罪2022

    • Author(s)
      谷口智憲
    • Organizer
      第50回日本臨床免疫学会総会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Current state of mouse models and possible use of non-rodent companion animal models for cancer immunology research2022

    • Author(s)
      谷口智憲
    • Organizer
      第81回日本癌学会学術総会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 複合がん免疫療法の開発2021

    • Author(s)
      谷口智憲
    • Organizer
      第37回 日本皮膚悪性腫瘍学会学術大会
    • Related Report
      2021 Annual Research Report
    • Invited

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

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