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Spatiotemporal regulation of NKT cell production by Rap1 GTPase

Research Project

Project/Area Number 20K07554
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49070:Immunology-related
Research InstitutionKansai Medical University

Principal Investigator

UEDA Yoshihiro  関西医科大学, 医学部, 講師 (90533208)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsRap1 / 胸腺 / NKT / インテグリン / 細胞極性 / NKT細胞
Outline of Research at the Start

NKT細胞は多くの人間で共通のT細胞受容体によりCD1dに提示された脂質を認識する自然T細胞で脾臓・肝臓・肺や腸組織に常在して、組織の炎症反応やがん免疫を制御していると考えられている。本研究では、NKT細胞の分化および活性化におけるリンパ球の接着と移動を調節する分子Rap1の欠損の影響を検討することで、Rap1によるNKT細胞の分化や活性化における接着・動態制御ポイントが明らかする。これにより、NKT細胞応答を制御する炎症やがんの新規の分子標的薬の開発が期待される。このようなNKTを標的とした治療薬は、TCR多様性が少なく多くの患者で共通である利点があり、効率性かつ有用性が期待される。

Outline of Final Research Achievements

Invariant NKT cells are a special subset of t cells to recognize fatty antigen and essential role for tumor immunity. In this study, We investigate the role of small GTPase Rap1 in NKT cell production and activation. By using knockout animal model, we found that Rap1 deficiency reduced NKT cells without TCR repertoire alternation in the thymus. Rap1 deficiency also required for activation of the periphery in response to alpha-Galactosylceramide. These data indicate Rap1 is required for NKT cell production and activation.

Academic Significance and Societal Importance of the Research Achievements

NKT細胞は多くの人間で共通のT細胞受容体によりCD1dに提示された脂質を認識する自然T細胞で脾臓・肝臓・肺や腸組織に常在して、組織の炎症反応やがん免疫を制御していると考えられている。本研究により、接着動態シグナル分子であるRap1が胸腺におけるNKT細胞の分化や末梢における活性化を調節することが明らかになった。これにより、NKT細胞応答を制御する炎症やがんの新規の分子標的薬の開発が期待される。このようなNKTを標的とした治療薬は、TCR多様性が少なく多くの患者で共通である利点があり、効率性かつ有用性が期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (12 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 4 results) Book (1 results)

  • [Journal Article] LFA1 Activation: Insights from a Single-Molecule Approach2022

    • Author(s)
      Kondo Naoyuki、Ueda Yoshihiro、Kinashi Tatsuo
    • Journal Title

      Cells

      Volume: 11 Issue: 11 Pages: 1751-1751

    • DOI

      10.3390/cells11111751

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Kindlin-3 disrupts an intersubunit association in the integrin LFA1 to trigger positive feedback activation by Rap1 and talin1,2021

    • Author(s)
      Kondo N, Ueda Y, Kinashi T.
    • Journal Title

      Sci Signal.

      Volume: Vol 14, Issue 686. Issue: 686

    • DOI

      10.1126/scisignal.abf2184

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] MST1/2 Balance Immune Activation and Tolerance by Orchestrating Adhesion, Transcription, and Organelle Dynamics in Lymphocytes2020

    • Author(s)
      Ueda Yoshihiro、Kondo Naoyuki、Kinashi Tatsuo
    • Journal Title

      Frontiers in Immunology

      Volume: 11 Pages: 733-733

    • DOI

      10.3389/fimmu.2020.00733

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Rap1 facilitates cell polarization via RhoA signaling in T cells2022

    • Author(s)
      Y. Ueda, K. Higasa, Y. Kamioka, N. Kondo, S. Horitani, Y. Ikeda, T. Fukuhara, Y. Fukui, T. Kinashi
    • Organizer
      The 51st Annual Meeting of the Japanese Society for Immunology, 2022.12, Kumamoto
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Distinct binding properties of integrin adaptors talin1 and kindlin-3 to LFA1 and α4 integrins modulate adhesive responses in static and shear-flow2022

    • Author(s)
      N. Kondo, Y. Kamioka, Y. Ikeda, Y. Ueda, T. Kinashi
    • Organizer
      The 51st Annual Meeting of the Japanese Society for Immunology, 2022.12, Kumamoto
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Subsecond Rap1 activation by outside-in signaling of LFA1/ICAM1 interactions strengthens L-selectin mediated rolling of T cells2022

    • Author(s)
      Y. Kamioka, Y. Ueda, N. Kondo, Y. Ikeda, T. Kinashi
    • Organizer
      The 51st Annual Meeting of the Japanese Society for Immunology, 2022.12, Kumamoto
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The critical role of Rap1GAPs in T cell recirculation and egress from lymph node. (WS01-18-P)2022

    • Author(s)
      S. Horitani, Y. Ueda, Y. Kamioka, N. Kondo, Y. Ikeda T. Fukuhara, M. Naganuma, T. Kinashi
    • Organizer
      The 51st Annual Meeting of the Japanese Society for Immunology, 2022.12, Kumamoto
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Rap1 facilitates T cell polarity via spatial regulation of MLC and ARAP12021

    • Author(s)
      Yoshihiro Ueda, Koichiro Higasa, Yuji Kamioka, Naoyuki Kondo, Tatsuo Kinashi
    • Organizer
      The 50th Annual Meeting of the Japanese Society for Immunology
    • Related Report
      2021 Research-status Report
  • [Presentation] Differential requirement of Rap1 and integrin adaptors for distinct modalities of T cell adhesion under shear flow2021

    • Author(s)
      Yuji Kamioka, Yoshihiro Ueda, Naoyuki Kondo, Tatsuo Kinashi
    • Organizer
      The 50th Annual Meeting of the Japanese Society for Immunology
    • Related Report
      2021 Research-status Report
  • [Presentation] Kindlin-3 breaks of integrin LFA-1 inhibitory clasp to promote positive feedback activation of LFA-1 by talin1 and Rap12021

    • Author(s)
      Naoyuki Kondo, Yoshihiro Ueda, Tatsuo Kinashi
    • Organizer
      The 50th Annual Meeting of the Japanese Society for Immunology
    • Related Report
      2021 Research-status Report
  • [Presentation] Rap1/Talin-1/Kindlin-3を内包する新規ポジティブフィードバック回路によるインテグリン活性化の離散的制御2020

    • Author(s)
      近藤直幸、植田祥啓、木梨達雄
    • Organizer
      第43回日本分子生物学会年会 、2P-0195
    • Related Report
      2020 Research-status Report
  • [Book] 食品免疫学事典2021

    • Author(s)
      日本食品免疫学会
    • Total Pages
      492
    • Publisher
      朝倉書店
    • ISBN
      9784254431261
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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