• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Investigating the contribution of potential ligands to the inhibitory function of LAG-3

Research Project

Project/Area Number 21K07076
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49070:Immunology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Maruhashi Takumi  東京大学, 定量生命科学研究所, 助教 (60743961)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
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)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsLAG-3 / 抑制性免疫補助受容体 / 免疫チェックポイント / リガンド / 自己免疫 / がん免疫 / 免疫チェックポイント分子
Outline of Research at the Start

抑制性免疫補助受容体LAG-3はPD-1とCTLA-4に次ぐ免疫チェックポイント分子として期待され、すでにLAG-3を標的とした薬剤の治験が進められている。一方で、現在までに複数の分子がLAG-3のリガンドとして報告されているが、実際にどれが正しいリガンドであるのか、また各分子がどのようにLAG-3による免疫抑制機能に寄与しているのか全くわかっていない。本研究では、独自に樹立した実験系、研究材料を駆使することで、各リガンドの機能的独立性・代償性・協調性を分子、細胞、個体レベルで包括的に解析し、LAG-3による抑制機能の作動原理およびその制御機構の解明を目指す。

Outline of Final Research Achievements

Lymphocyte-activation gene 3 (LAG-3), a potent inhibitory co-receptor, attracts much attention as a promising target of immuno-therapies. However, its functional ligand remains elusive, as several distinct ligands have been identified. Here, we investigated the relative contribution of potential ligands to LAG-3 activity. We found that binding of LAG-3 to stable peptide-MHC class II complex (pMHCII) induced T cell suppression in vitro. Consistently, LAG-3-mediated suppression of fulminant type 1 diabetes and anti-cancer immunity in mice required its engagement with stable pMHCII. These results indicate that stable pMHCII serves as the functional ligand of LAG-3 to trigger its immuno-inhibitory function.

Academic Significance and Societal Importance of the Research Achievements

すでに使用が開始されているものに加え、がん患者を対象として複数のLAG-3阻害抗体の臨床試験が進行中であるにも関わらず、リガンド分子との結合に対する阻害活性が正確に評価されているとは言えない状況にあった。本研究成果は、LAG-3と安定なpMHCIIとの結合阻害活性が重要な指標であることの科学的根拠となるものであり、安全性と治療効果の高いLAG-3標的薬の開発に貢献すると期待される。

Report

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

    (13 results)

All 2024 2023 2022 2021

All Journal Article (6 results) (of which Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (7 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results)

  • [Journal Article] DCIR suppresses osteoclastic proliferation and resorption by downregulating M-CSF and RANKL signaling2023

    • Author(s)
      Kaifu Tomonori、Maruhashi Takumi、Chung Soo-Hyun、Shimizu Kenji、Nakamura Akira、Iwakura Yoichiro
    • Journal Title

      Frontiers in Immunology

      Volume: 14

    • DOI

      10.3389/fimmu.2023.1159058

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] LAG-3による自己免疫とがん免疫の抑制機構2023

    • Author(s)
      丸橋拓海, 岡崎拓
    • Journal Title

      感染・炎症・免疫

      Volume: 53 Pages: 19-30

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Binding of LAG-3 to stable peptide-MHC class II limits T?cell function and suppresses autoimmunity and anti-cancer immunity2022

    • Author(s)
      Maruhashi Takumi、Sugiura Daisuke、Okazaki Il-mi、Shimizu Kenji、Maeda Takeo K.、Ikubo Jun、Yoshikawa Harunori、Maenaka Katsumi、Ishimaru Naozumi、Kosako Hidetaka、Takemoto Tatsuya、Okazaki Taku
    • Journal Title

      Immunity

      Volume: - Issue: 5 Pages: 912-924

    • DOI

      10.1016/j.immuni.2022.03.013

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] PD-1 agonism by anti-CD80 inhibits T cell activation and alleviates autoimmunity2022

    • Author(s)
      Sugiura Daisuke、Okazaki Il-mi、Maeda Takeo K.、Maruhashi Takumi、Shimizu Kenji、Arakaki Rieko、Takemoto Tatsuya、Ishimaru Naozumi、Okazaki Taku
    • Journal Title

      Nature Immunology

      Volume: 23 Issue: 3 Pages: 399-410

    • DOI

      10.1038/s41590-021-01125-7

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] T-cell-intrinsic and -extrinsic regulation of PD-1 function2021

    • Author(s)
      Sugiura Daisuke、Shimizu Kenji、Maruhashi Takumi、Okazaki Il-mi、Okazaki Taku
    • Journal Title

      International Immunology

      Volume: 33 Issue: 12 Pages: 693-698

    • DOI

      10.1093/intimm/dxab077

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] PD-1 preferentially inhibits the activation of low-affinity T cells2021

    • Author(s)
      Shimizu Kenji、Sugiura Daisuke、Okazaki Il-mi、Maruhashi Takumi、Takemoto Tatsuya、Okazaki Taku
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Issue: 35

    • DOI

      10.1073/pnas.2107141118

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The requirement of dimer-forming ability for LAG-3 to inhibit T cell activation2024

    • Author(s)
      Takumi Maruhashi, Dawei Chen, Il-mi Okazaki, Daisuke Sugiura, Kenji Shimizu, Taku Okazaki
    • Organizer
      The 52th Annual Meeting of the Japanese Society for Immunology
    • Related Report
      2023 Annual Research Report
  • [Presentation] Identification of an MHC class II mutant lacking LAG-3-binding capacity while retaining antigen-presenting ability2024

    • Author(s)
      Takumi Maruhashi, Taku okazaki
    • Organizer
      The 1st AMED SCARDA Joint Symposium of Japan Initiative for World-leading Vaccine Research and Development Centers
    • Related Report
      2023 Annual Research Report
  • [Presentation] Binding of LAG-3 to stable peptide-MHC class II limits T cell function and suppresses autoimmunity and anti-cancer immunity2023

    • Author(s)
      丸橋 拓海
    • Organizer
      第18回血液若手研究者勉強会(麒麟塾)
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Immune regulation by LAG-3, an inhibitory co-receptor of a unique target selectivity2023

    • Author(s)
      Takumi Maruhashi, Taku Okazaki
    • Organizer
      The 32nd Hot Spring Harbor International Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] LAG-3の免疫抑制機能作動原理の解明2022

    • Author(s)
      丸橋 拓海
    • Organizer
      第 31 回東京免疫フォーラム
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Stable pMHCII serves as the ligand of LAG-3 to trigger its inhibitory function2022

    • Author(s)
      Takumi Maruhashi, Daisuke Sugiura, Il-mi Okazaki, Kenji Shimizu, Taku Okazaki
    • Organizer
      The 51th Annual Meeting of the Japanese Society for Immunology
    • Related Report
      2022 Research-status Report
  • [Presentation] LAG-3 engagement with stable pMHCII is essential for the exertion of its inhibitory function2021

    • Author(s)
      Takumi Maruhashi, Daisuke Sugiura, Il-mi Okazaki, Kenji Shimizu, Taku Okazaki
    • Organizer
      The 50th Annual Meeting of the Japanese Society for Immunology
    • Related Report
      2021 Research-status Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi