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The single-molecule analysis of dynamic regulation of integrin-dependent adhesion processes

Research Project

Project/Area Number 19H03229
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 44010:Cell biology-related
Research InstitutionKansai Medical University

Principal Investigator

KINASHI Tatsuo  関西医科大学, 医学部, 教授 (30202039)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2019: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords細胞接着 / インテグリン / Rap1 / talin / kindlin3 / cell adhesion / integrins
Outline of Research at the Start

インテグリンは細胞外環境に応じて細胞接着を動的に制御し細胞移動や増殖等に重要な影響を与えている。しかし、従来の研究手法では動的な調節機構の解明に限界があり、いまだその制御には至っていない。私たちはこれまで世界に先駆けてRap1シグナルがインテグリン接着を制御していることを明らかにしてきた。本研究では個々の細胞内分子的挙動を追跡できる一分子計測の手法を用いて、Rap1シグナルによるインテグリン制御の動的調節を解明し、免疫や癌浸潤・転移への効果を明らかにする。本研究の創造性は一分子レベルでインテグリン接着制御の全貌を解明し、制御法の開発へつなげるもので新たな領域を開拓するものとして期待される。

Outline of Final Research Achievements

Integrins are cell adhesion molecules, which play important roles in cell attachment, migration and accumulation, and also influence cell growth. In this study, we have established single-molecule measurements of integrin binding proteins talin1 and kindlin-3 and thereby revealing the following points: (1) The binding kinetics of talin1 and LFA1 corresponded to that of LFA1 and ICAM1. (2) Kindlin-3 is required for LFA1 to undergo structural changes to an extended/open (high affinity) conformation. (3) When bound to ICAM1, the extended/open conformers activate small GTPase Rap1, which in turn recruits talin1 and kindlin-3 to LFA1 leading to amplification of cell attachment by LFA1. This study has demonstrated the precise adhesion mechanism of LFA1 and would contribute development of therapeutics for immune diseases in which leukocytes adhesion is abnormally accelerated.

Academic Significance and Societal Importance of the Research Achievements

リンパ球は全身を循環しながら生体防御を行っています。その過程で、LFA1はICAM1という接着分子に結合しますが、その結合の強さを変化させることによって、リンパ球の停止や移動を調節します。この調節過程にはインテグリン結合分子talin1とkindlin-3が関与すると考えられていますが詳細は不明でした。本研究では、一分子計測法という新たな測定方法を用いて、talin1とkindlin-3およびその調節分子であるRap1との連携による作用機序を明らかにしました。この成果はインテグリンの接着を変化させることにつながり、白血球の異常な集積を伴う免疫疾患の新たな治療戦略に役立つと考えられます。

Report

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

    (17 results)

All 2021 2020 2019 Other

All Journal Article (6 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (2 results)

  • [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 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Learning Dataset for Identification of Active Molecules: A Case Study of Integrin αIIbβ3 Inhibitors.2021

    • Author(s)
      Kawai K., Tomonou M., Machida Y., Karuo Y., Tarui A. Sato K., Ikeda Y., Kinashi T., Omote M.
    • Journal Title

      Mol Inform.

      Volume: - Issue: 6

    • DOI

      10.1002/minf.202060040

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 【ジーンハンティングによる炎症・免疫研究の発展】IL-4およびIL-5の遺伝子クローニング2020

    • Author(s)
      木梨達雄
    • Journal Title

      炎症と免疫

      Volume: 26(3) Pages: 175-180

    • Related Report
      2020 Annual Research Report
  • [Journal Article] インテグリン創薬から考える一回膜貫通型タンパク質における創薬ストラテジー2020

    • Author(s)
      池田幸樹、木梨達雄
    • Journal Title

      SAR News

      Volume: 39 Pages: 17-23

    • Related Report
      2020 Annual Research Report
  • [Journal Article] MST1/2 balance immune activation and tolerance by orchestrating adhesion, transcription, and organelle dynamics in lymphocytes.2020

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

      Frontier Immunology.

      Volume: -

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 白血球インテグリンによる接着の制御機構2019

    • Author(s)
      木梨達雄
    • Journal Title

      日本血栓止血学会誌

      Volume: 30(4) Pages: 586-595

    • NAID

      130007689122

    • Related Report
      2019 Annual Research 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)
      N. Kondo, Y. Ueda, T. Kinashi,
    • Organizer
      The 50th Annual Meeting of the Japanese Society for Immunology
    • Related Report
      2021 Annual Research Report
  • [Presentation] Rap1 facilitates T cell polarity via spatial regulation of MLC and ARAP12021

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

    • Author(s)
      Y. Kamioka, Y. Ueda, N. Kondo, T. Kinashi
    • Organizer
      The 50th Annual Meeting of the Japanese Society for Immunology
    • Related Report
      2021 Annual Research Report
  • [Presentation] Shootin1b as a clutch molecule for dendritic cell chemotaxis,2020

    • Author(s)
      K. Baba, Y. Nagashima, R. Takeuchi, M. Sakai, Y. Higashiguchi, H. Katsuno-Kambe, Y. Ueda, Y. Kamioka, T. Kinashi, N. Inagaki
    • Organizer
      CELL BIO virtual 2020(Web Meeting)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [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、オンライン学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Roles of Rap1 signaling in lymphocyte homing to peripheral and mucosal lymph nodes2019

    • Author(s)
      Y Kamioka, Y Ueda, N Kondo, T Kinashi
    • Organizer
      The 48th Annual Meeting of the Japanese Society for Immunology 2019(第48回 日本免疫学会学術集会2019) Hamamatsu
    • Related Report
      2019 Annual Research Report
  • [Presentation] Rap1 accelerates T cell polarity formation via the enhancement of Rho-Rock pathways2019

    • Author(s)
      Y Ueda, K Higasa, Y Kamioka, N Kondo, T kinashi,
    • Organizer
      The 48th Annual Meeting of the Japanese Society for Immunology 2019(第48回 日本免疫学会学術集会2019) Hamamatsu
    • Related Report
      2019 Annual Research Report
  • [Presentation] インテグリン関連疾患治療薬開発に向けた薬剤スクリーニング法の開発,2019

    • Author(s)
      Y Ikeda, N Kondo, H Takeda, Y Makita, Y Fukunishi, Y Ueda, K Sato, M Murayama, B Ma, Y Isaka, K Kawai, T Mashimo, Y Kamioka, M Araki, M Omote and T Kinashi
    • Organizer
      第10回スクリーニング学研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 白血球インテグリン接着のメカニズムと炎症性腸疾患への応用2019

    • Author(s)
      木梨達雄
    • Organizer
      第56回日本消化器免疫学会総会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Remarks] 関西医科大学附属生命医学研究所 分子遺伝学部門

    • URL

      http://www3.kmu.ac.jp/molgent/index.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] 関西医科大学附属生命医学研究所 分子遺伝学部門

    • URL

      http://www3.kmu.ac.jp/molgent/posts/post4.html

    • Related Report
      2020 Annual Research Report

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

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