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Analyses on the role of Eomesodermin in CD8+ T cell exhaustion

Research Project

Project/Area Number 19K07715
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionKitasato University

Principal Investigator

Eshima Koji  北里大学, 医学部, 准教授 (30327324)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsT細胞疲弊化 / Eomesodermin / トランスジェニックマウス / 転写因子 / 細胞傷害性T細胞
Outline of Research at the Start

抗腫瘍免疫反応においてしばしば問題となるT細胞の疲弊化の機序には未だ不明な点が多く,詳細解明は急務である。我々はCD8陽性の疲弊T細胞中に高発現する転写因子Eomesの機能を解析するためにEomes-Tgマウスを作成した。このEomes-Tgマウス内のT細胞では疲弊化T細胞の特徴の一部の表出が見られ,EomesがT細胞疲弊化に重要であることが示唆された。これらの結果を踏まえて本研究計画ではEomes-Tgマウス内のT細胞の反応性,発現遺伝子等を詳細に解析することにより,T細胞疲弊化におけるEomesの役割を解明し,新規治療法における標的分子としてのEomesの可能性を検討したい。

Outline of Final Research Achievements

Although in treating cancers, T cell exhaustion often emerges as one of the problems to be overcome, the detailed mechanisms of induction of T cell exhaustion still remain largely unclear. In this study, to investigate the possible involvement of Eomesodermin (Eomes), a transcriptional regulator found in exhausted T cells, we generated and analyzed the transgenic mice where Eomes is constitutively expressed in T cells. The results suggested that in Eomes-Tg, T cells expressed some of exhaustion markers and their responsiveness was attenuated, indicating that Eomes may indeed contribute to induce T cell exhaustion. The results also suggested that Eomes may regulate the expression of exhaustion markers either by enhancing the effect of antigen stimulation or by acting independently of TCR stimulation. Furthermore, it was also suggested that Eomes may elicit T cell exhaustion by inducing miR-31, which were recently shown to be an important accelerator of T cell exhaustion.

Academic Significance and Societal Importance of the Research Achievements

抗腫瘍免疫療法において「免疫チェックポイント阻害」が非常に有効であることは,抗腫瘍療法において腫瘍特異的なT細胞の疲弊化からの回復が重要であることを示している。しかし,T細胞疲弊化の機序の詳細について未だ不明の部分が多く,PD-1やCTLA-4に対する抗体などを用いた既存の治療法以外,このような観点からの新たな治療法開発はあまり進んでいない。本研究において疲弊化T細胞内に高発現する転写因子EomesがT細胞疲弊化に寄与していることが示唆され,Eomesが疲弊化解除のための標的分子となりうる可能性が示唆された。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results)

  • [Journal Article] Natural Killer Cell Group 7 Sequence in Cytotoxic Cells Optimizes Exocytosis of Lytic Granules Essential for the Perforin-Dependent, but Not Fas Ligand?Dependent, Cytolytic Pathway2021

    • Author(s)
      Morikawa Yuhki、Murakami Minami、Kondo Hitoshi、Nemoto Noriko、Iwabuchi Kazuya、Eshima Koji
    • Journal Title

      ImmunoHorizons

      Volume: 5 Issue: 4 Pages: 234-245

    • DOI

      10.4049/immunohorizons.2100029

    • Related Report
      2021 Annual Research Report
  • [Journal Article] NF-κB-inducing kinase contributes to normal development of cortical thymic epithelial cells: its possible role in shaping a proper T-cell repertoire.2020

    • Author(s)
      Eshima K, Misawa K, Ohashi C, Noma H, Iwabuchi K.
    • Journal Title

      Immunology

      Volume: - Issue: 2 Pages: 198-208

    • DOI

      10.1111/imm.13186

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Eomesodermin in CD8+ CTLs induces the expression of Nkg7 which specifically promotes perforin/granzyme-pathway of cytolysis by optimizing exocytosis of lytic granules.2021

    • Author(s)
      江島耕二,森川優樹,村上南,近藤均,根本典子,岩渕和也
    • Organizer
      第50回日本免疫学会総会・学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 転写因子EomesoderminによるNkg7発現誘導を介したPerforin経路特異的な傷害顆粒放出反応の促進2021

    • Author(s)
      江島耕二,森川優樹,村上南,近藤均,根本典子,岩渕和也
    • Organizer
      第32回日本生体防御学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 胸腺皮質上皮細胞の機能におけるNF-κB-inducing kinaseの寄与について2021

    • Author(s)
      江島耕二,三澤佳奈,岩渕和也
    • Organizer
      第40回日本胸腺研究会
    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Presentation] T細胞疲弊化における,転写因子Eomesoderminの役割の解析2019

    • Author(s)
      江島耕二,村上南,森川優樹,大橋千尋,岩渕和也
    • Organizer
      第29回 KTCC (Kyoto T cell Conference)
    • Related Report
      2019 Research-status Report
  • [Presentation] The role of Eomesodermin in T cell exhaustion.2019

    • Author(s)
      村上南,江島耕二,岩渕和也
    • Organizer
      第48回日本免疫学会総会・学術集会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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