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Rigidity sensing of amoeboid cells for their directional migration

Research Project

Project/Area Number 20H03227
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43040:Biophysics-related
Research InstitutionYamaguchi University

Principal Investigator

Iwadate Yoshiaki  山口大学, 大学院創成科学研究科, 教授 (40298170)

Co-Investigator(Kenkyū-buntansha) 櫻井 建成  武蔵野大学, 工学部, 教授 (60353322)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Keywords細胞遊走 / アメーバ運動 / 細胞性粘菌 / Rigidity Sensing / 細胞運動 / アクチン / ミオシン / ライブイメージング / 細胞性粘菌アメーバ
Outline of Research at the Start

最近代表者らは、好中球など速い遊走細胞が基質の柔らかい方向に進むrigidity sensingを発見した。本研究ではこの新規rigidity sensingの分子メカニズム解明を目指す。本研究は、代表者らの独自の発見に基づいて立脚され、独創性が高い。光学顕微鏡観察に長けた代表者が生細胞観察を行い、物理系の数理計算に長けた分担者が数理モデル作成とシミュレーションを行う。速いアメーバ細胞の rigidity sensing の分子メカニズム解明は、将来、速く移動するがん細胞や免疫細胞を、薬剤を使わずに、非侵襲な力学的方法で移動制御する医療技術への展開が期待できる。

Outline of Final Research Achievements

Adherent cells sense the rigidity of their substrate (rigidity sensing). Previously, we found a novel rigidity sensing of fast amoebae towards softer area. The aim of this study was to elucidate this molecular mechanism, focusing on changes in the affinity of myosin II for F-actin. In this study, it was found that Dictyostelium amoebae lacking myosin II did not show rigidity sensing, that the cells showed different behaviour from wild-type cells during freely locomotion without chemoattractant cAMP, and that GFP myosin II not only localised at the posterior end of the cell but also accumulated transiently at the anterior end of the cell.

Academic Significance and Societal Importance of the Research Achievements

細胞のアメーバ運動は、これまで主に、誘引物質に向かう走化性という見地から研究されてきた。走化性は、誘引物質が遠く離れると細胞が感知できない。 一方、足場には必ず硬さが存在するため、rigidity sensing は常に機能している。rigidity sensingに基づき細胞の移動は、より根源的な移動のメカニズムと言える。医療応用の観点で、本研究の成果はがん細胞や傷修復を担う表皮細胞、好中球など免疫細胞などに対する薬剤を使わない非 侵襲な新規の移動制御技術につながり、がんや創傷の新規治療法研究への発展が期待できる。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (11 results)

All 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 4 results) Presentation (7 results) (of which Invited: 1 results)

  • [Journal Article] Linear contraction of stress fibers generates cell body rotation2023

    • Author(s)
      Okimura, C., Akiyama, S., Nishigami, Y., Zaitsu, R., Sakurai, T. and Iwadate Y.
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2023.01.03.522661

    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] Leading edge elongation by follower cell interruption in advancing epithelial cell sheets2022

    • Author(s)
      Okimura, C., Iwanaga, M., Sakurai, T., Ueno, T., Urano, Y. and Iwadate Y
    • Journal Title

      PNAS

      Volume: 119 Issue: 18

    • DOI

      10.1073/pnas.2119903119

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparative mapping of crawling-cell morphodynamics in deep learning-based feature space2021

    • Author(s)
      Imoto, D., Saito, N., Nakajima, A., Honda, G., Ishida, M., Sugita, T., Ishihara, S., Katagiri, K., Okimura, C., Iwadate, Y. and Sawai, S.
    • Journal Title

      PLoS Computational Biology

      Volume: 17(8) Issue: 8 Pages: 1009237-1009267

    • DOI

      10.1371/journal.pcbi.1009237

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Discovery of an F-actin-binding small molecule serving as a fluorescent probe and a scaffold for functional probes2021

    • Author(s)
      Takagi T, Ueno T, Ikawa K, Asanuma D, Nomura Y, Uno S, Komatsu T, Kamiya M, Hanaoka K, Okimura C, Iwadate Y, Hirose K, Nagano T, Sugimura K and Urano Y.
    • Journal Title

      Science Advances

      Volume: 7(47) Issue: 47

    • DOI

      10.1126/sciadv.abg8585

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 機械モデルから導かれたケラトサイトのストレスファイバ直動回転変換機構2023

    • Author(s)
      沖村千夏,秋山珠祐, 西上幸範, 櫻井建成,岩楯好昭
    • Organizer
      2023 年 生体運動研究合同班会議
    • Related Report
      2022 Annual Research Report
  • [Presentation] ケラトサイト集団を相似拡大させるリーダー細胞たちの綱引きの均衡2023

    • Author(s)
      岩永美咲, 沖村千夏, 櫻井建成, 岩楯好昭
    • Organizer
      2023 年 生体運動研究合同班会議
    • Related Report
      2022 Annual Research Report
  • [Presentation] Cooperative but forcible promotion of follower cells to leaders in collective migration of fish keratocytes2022

    • Author(s)
      Iwadate Y.
    • Organizer
      第60回生物物理学会年会シンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Breaking of actomyosin cables in keratocyte collectives and their role in the coordinated collective migration2022

    • Author(s)
      岩永美咲、沖村千夏、櫻井建成、上野 匡、浦野泰照、岩楯好昭
    • Organizer
      第60回生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Linear contraction of stress fibers kicks the substratum for their rotation2022

    • Author(s)
      沖村千夏,秋山珠祐, 櫻井建成,岩楯好昭
    • Organizer
      第60回生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Conversion of linear contraction of stress fibers into rotation in migrating cells2021

    • Author(s)
      Okimura C, Akiyama S, Sakurai T and Iwadate Y
    • Organizer
      第58回生物物理学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Leading Edge Expansion in Migrating Cell Sheet by Follower Cell's Interruption2021

    • Author(s)
      Iwanaga M, Okimura C, Sakurai T and Iwadate Y
    • Organizer
      第58回生物物理学会年会
    • Related Report
      2020 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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