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Molecular mechanisms of memory T cell differentiation by co-stimulatory molecules

Research Project

Project/Area Number 22K20771
Research Category

Grant-in-Aid for Research Activity Start-up

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

Principal Investigator

MORI Daiki  大阪大学, 感染症総合教育研究拠点, 特任助教(常勤) (50907508)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsT細胞 / 免疫記憶 / シグナル伝達 / T細胞免疫 / 獲得免疫応答
Outline of Research at the Start

ワクチンは感染症に対抗するための強力なツールであり、リンパ球の一種であるB細胞やT細胞による免疫記憶が形成されることで成り立つ。T細胞に発現する補助刺激分子の下流で活性化されるPI3K経路は増殖・生存・分化を促しT細胞の記憶形成や成熟に重要であり、効率よいワクチンの開発などにも応用可能な知見となりうる。PI3Kの局在を制御するサブユニットp85にはいくつかの機能未知のタンパク質結合ドメインが存在し、その相互作用分子の全容は明らかではない。そこで本研究では、未知の新規p85の相互作用分子の同定を基にT細胞の記憶細胞分化機構でのPI3Kシグナルの役割の解明を目指す。

Outline of Final Research Achievements

Co-stimulatory molecules expressed on T cells are an important group of molecules that regulate T cell differentiation and survival. Investigating the mechanisms of T cell activation by co-stimulatory molecules is one of the important issues for the development of efficient vaccines. Previously we investigated the molecules involving co-stimulatory signals by affinity purification followed by mass-spectorometry, and found novel interacting partners of PI3K. In this research, we attempted to establish an experimental method to disrupt genes of interest on T cells in vitro, and analyze their functions in vivo using adoptive T cell transfer experiments. Although further studies on the gene deletion method were needed, we succeeded in setting up an experimental method to transfer T cells and evaluate their in vivo responses.

Academic Significance and Societal Importance of the Research Achievements

本研究では、今後申請者がT細胞の補助刺激分子シグナル経路の解析を行うために必須の実験系の樹立などを行うことに成功した。T細胞に発現する補助刺激分子はT細胞の分化・生存を司る重要な分子群である。また、近年では補助刺激分子シグナルの違いは、T細胞の記憶細胞への分化や抗体産生を促す濾胞性ヘルパーT細胞の分化に影響を与えることが明らかとなってきている。今後の遂行状況次第では、T細胞の記憶細胞への分化機構などの新規メカニズムの解明などが期待できる。そのため、より効率良く免疫記憶を誘導できるワクチン法の開発などに貢献できる可能性もある。

Report

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

    (5 results)

All 2024 2023 2022

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

  • [Journal Article] Defective LAT signalosome pathology in mice mimics human IgG4-related disease at single-cell level"2023

    • Author(s)
      Anais Joachim, Rudy Aussel, Lena Gelard, Fanghui Zhang, Daiki Mori, Claude Gregoire, Sergio Villazala Merino, Mauro Gaya, Yinming Liang, Marie Malissen, Bernard Malissen.
    • Journal Title

      Journal of Experimental Medicine

      Volume: 220(11) Issue: 11

    • DOI

      10.1084/jem.20231028

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Human Dectin-1 is O-glycosylated and serves as a ligand for C-type lectin receptor CLEC-22022

    • Author(s)
      Haji Shojiro、Ito Taiki、Guenther Carla、Nakano Miyako、Shimizu Takashi、Mori Daiki、Chiba Yasunori、Tanaka Masato、Mishra Sushil K、Willment Janet A、Brown Gordon D、Nagae Masamichi、Yamasaki Sho
    • Journal Title

      eLife

      Volume: 11

    • DOI

      10.7554/elife.83037

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Analysis of clonal diversity of murine T follicular helper cells during influenza virus infection2024

    • Author(s)
      森 大輝、伊勢 渉
    • Organizer
      第53回日本免疫学会学術集会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 濾胞性Tヘルパー細胞の記憶細胞分化機構の解明2023

    • Author(s)
      森 大輝
    • Organizer
      第7回先進医薬研究報告会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Composition of the UBASH3A signalosome emphasizes its negative regulatory function in TCR signaling2023

    • Author(s)
      Daiki Mori, Bernard Malissen
    • Organizer
      第51回日本免疫学会学術総会
    • Related Report
      2022 Research-status Report

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Published: 2022-09-01   Modified: 2025-01-30  

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