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Cell function, receptor editing to develop a T-cell cytoskeleton-based biomicromachine.

Research Project

Project/Area Number 22K16301
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 54010:Hematology and medical oncology-related
Research InstitutionKyoto University

Principal Investigator

Minagawa Atsutaka  京都大学, iPS細胞研究所, 特定研究員 (90838822)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords人工受容体 / トロゴサイトーシス / シェディング / エンドサイトーシス / バイオエンジニアリング / 免疫療法 / キメラ受容体 / 免疫細胞 / エンジニアリング
Outline of Research at the Start

甘味受容体の改変を通じて、グルコース濃度依存的に、免疫細胞に刺激シグナルを伝達する事が出来る人工受容体の作製を目指す。甘味受容体の細胞外ドメインを、チロシンキナーゼ型受容体の細胞内ドメインと結合させる事で、グルコース依存的にチロシンキナーゼ型のシグナル伝達を起こす事が可能な構造を作れるという仮説のもとに、本研究では様々な受容体を結合させ、反応性の構造のスクリーニングを行っていく。

Outline of Final Research Achievements

In the process of creating artificial receptors with novel structures and evaluating their functions, it was discovered that the duration of signal transduction is prolonged and the function is enhanced when the receptors are structured in such a way that shedding, a phenomenon in which the extracellular domain of the receptor is cleaved, occurs. This phenomenon is due to the fact that shedding suppresses trogocytosis, a membrane protein exchange phenomenon between neighbouring cells, and maintains the expression level of the target protein on the target cell, as shown by inhibitors and mutagenesis that suppress shedding. They also found that the structure and size of the intracellular domain of the artificial receptor is closely related to the regulation of shedding and trogocytosis. This finding is considered to be a fundamental principle for future artificial receptor design.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果から、受容体シェディングによるトロゴサイトーシスの調整法についての基盤理論の構築に成功した。またシェディング構造を導入し、トロゴサイトーシスが抑制されたキメラ受容体は、動物実験にて増強された抗腫瘍効果を持つことを示すことに成功した。この結果はがん治療におけるキメラ受容体の新しい設計概念となるのみならず、シェディングとトロゴサイトーシスの関連は、すべての膜蛋白受容体にて起こっている現象であることが予想され、近接細胞間コミュニケーションを理解する上で重要な知見である。

Report

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

    (8 results)

All 2024 2023 2022

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results) Patent(Industrial Property Rights) (2 results) (of which Overseas: 1 results)

  • [Journal Article] Mini-TCRs: Truncated T?cell receptors to generate T?cells from induced pluripotent stem cells2023

    • Author(s)
      Takayanagi Shin-ichiro、Wang Bo、Hasegawa Saki、Nishikawa Satoshi、Fukumoto Ken、Nakano Kohei、Chuganji Sayaka、Kato Yuya、Kamibayashi Sanae、Minagawa Atsutaka、Kunisato Atsushi、Nozawa Hajime、Kaneko Shin
    • Journal Title

      Molecular Therapy - Methods & Clinical Development

      Volume: 31 Pages: 101109-101109

    • DOI

      10.1016/j.omtm.2023.101109

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Optimization of the proliferation and persistency of CAR T cells derived from human induced pluripotent stem cells.2023

    • Author(s)
      Ueda T, Shiina S, Iriguchi S, Terakura S, Kawai Y, Kabai R, Sakamoto S, Watanabe A, Ohara K, Wang B, Xu H, Minagawa A, Hotta A, Woltjen K, Uemura Y, Kodama Y, Seno H, Nakatsura T, Tamada K, Kaneko S.
    • Journal Title

      Nat Biomed Eng.

      Volume: 7(1) Pages: 24-37

    • DOI

      10.1038/s41551-022-00969-0

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Trogocytosis controlled Cleavable-CAR-T cells show enhanced anti-tumor activity2024

    • Author(s)
      Atsutaka Minagawa
    • Organizer
      日本免疫学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] トロゴサイトーシスの抑制を通じた、キメラ受容体の機能増強2024

    • Author(s)
      南川淳隆
    • Organizer
      日本再生医療学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Trogocytosis Controlled CAR-T Cells Show Enhanced Anti-Tumor Activity2023

    • Author(s)
      Atsutaka Minagawa
    • Organizer
      JSH international symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Trogocytosis controlled CAR-T cells show enhanced anti-tumor activity2023

    • Author(s)
      Atsutaka Minagawa. Shin Kaneko
    • Organizer
      JSH international symposium
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] シェディング構造を有する人工受容体2023

    • Inventor(s)
      南川淳隆 金子新
    • Industrial Property Rights Holder
      南川淳隆 金子新
    • Industrial Property Rights Type
      特許
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] シェディング構造を持つキメラ受容体2022

    • Inventor(s)
      南川淳隆 金子新
    • Industrial Property Rights Holder
      南川淳隆 金子新
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report

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Published: 2022-04-19   Modified: 2025-01-30  

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