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Molecular mechanism of epithelial sheet formation and its repair through the tight junction

Research Project

Project/Area Number 21H02684
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionThe University of Tokushima

Principal Investigator

YONEMURA Shigenobu  徳島大学, 大学院医歯薬学研究部(医学域), 教授 (60192811)

Project Period (FY) 2021-04-01 – 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 2023: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2021: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywordsタイトジャンクション / 上皮シート / ミオシン / アクチン / 損傷修復 / バリア機能 / 張力 / ZO-1
Outline of Research at the Start

上皮シートに穴が開いたときにはアクトミオシンの集積と収縮による速やかな修復運動(損傷領域を覆い、死細胞を除去する)によってシートが回復する。本研究では、アクトミオシン集積のきっかけは、上皮細胞間のバリア機能を担う細胞間接着装置であるタイトジャンクション(TJ)が生/死細胞間で変化することであると考え、どのような機序でアクトミオシンが集積するのかについての分子的な理解を格段に進める。

Outline of Final Research Achievements

Because I have already noticed the intimate relationship between myosin activity and tight junction formation, I performed several gene knock down experiments which might be involved in the regulation of myosin activity. Galpha12/13 are known to regulate actin cytoskeleton through myosin activity and their knock down lead to TJ formation failure together with the incomplete formation of adherens junctions (AJ). Similarly, ROCK I was found to be important in maturing AJs resulting in TJ formation failure. Tension generated by actomyosin constriction appears to be involved in the wound closure movement of epithelial sheets. Live imaging of epithelial cells using laser ablation and magnetic beads showed that cells sense the degree of tension and respond to tension to facilitate wound closure movement.

Academic Significance and Societal Importance of the Research Achievements

AJ形成には初期段階と成熟段階があり、AJの成熟を経てTJができるのが通常の過程である。今回見出したGalpha12/13はAJの成熟がかなり遅れているように観察された。これまで、Galpha12/13がTJ形成に重要であるという報告はあったが、TJに直接影響しているのではなく、AJ成熟に重要であることが明らかになった。これまで、ミオシンの活性を制御しうる候補が提唱されてきたが、このようなAJ形成の特別な過程に重要というものはなく、細胞間接着装置形成、上皮シート形成の分子機構を理解する上で、今後の研究の展開に深く関わる知見が得られた。

Report

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

    (17 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (8 results) (of which Invited: 1 results)

  • [Int'l Joint Research] Institute of Cardiovascular Immunology/University Hospital Bonn/University of Bonn(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Mechanobiology Institute/National University of Singapore(シンガポール)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Necrosensor: a genetically encoded fluorescent sensor for visualizing necrosis in Drosophila.2023

    • Author(s)
      Nishida H, Albero AB, Onoue K, Ikegawa Y, Sulekh S, Sakizli U, Minami Y, Yonemura S, Wang YC, Yoo SK.
    • Journal Title

      Biol Open.

      Volume: - Issue: 1

    • DOI

      10.1242/bio.060104

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Apoptotic extracellular vesicle formation mediated by local phosphatidylserine exposure drives efficient cell extrusion2023

    • Author(s)
      Kira A, Tatsutomi I, Saito K, Murata M, Hattori I, Haruna K, Muraki N, Oda Y, Satoh S, Tsukamoto Y, Kimura S, Onoue K, Yonemura S, Arakawa S, Kato H, Hirashima T, Kawane K
    • Journal Title

      Dev. Cell

      Volume: 58 Issue: 14 Pages: 1282-1298

    • DOI

      10.1016/j.devcel.2023.05.008

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Epigenetic plasticity safeguards heterochromatin configuration in mammals2023

    • Author(s)
      Fukuda Kei、Shimi Takeshi、Shimura Chikako、Ono Takao、Suzuki Takehiro、Onoue Kenta、Okayama Satoko、Miura Hisashi、Hiratani Ichiro、Ikeda Kazuho、Okada Yasushi、Dohmae Naoshi、Yonemura Shigenobu、Inoue Azusa、Kimura Hiroshi、Shinkai Yoichi
    • Journal Title

      Nucleic Acids Research

      Volume: - Issue: 12 Pages: 6190-6207

    • DOI

      10.1093/nar/gkad387

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Proximal deposition of collagen IV by fibroblasts contributes to basement membrane formation by colon epithelial cells in vitro.2022

    • Author(s)
      Tentaku A, Kurisu S, Sejima K, Nagao T, Takahashi A, Yonemura S.
    • Journal Title

      FEBS J.

      Volume: 289 Issue: 23 Pages: 7466-7485

    • DOI

      10.1111/febs.16559

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Appropriate tension sensitivity of α-catenin ensures rounding morphogenesis of epithelial spheroids2022

    • Author(s)
      Ryosuke Nishimura, Kagayaki Kato, Misako Saida, Yasuhiro Kamei, Masahiro Takeda, Hiromi Miyoshi, Yutaka Yanagita, Yu Amano, Shigenobu Yonemura
    • Journal Title

      Cell Structure and Function

      Volume: 47 Issue: 2 Pages: 55-73

    • DOI

      10.1247/csf.22014

    • ISSN
      0386-7196, 1347-3700
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tracheal motile cilia in mice require CAMSAP3 for the formation of central microtubule pair and coordinated beating2021

    • Author(s)
      Saito Hiroko、Matsukawa-Usami Fumiko、Fujimori Toshihiko、Kimura Toshiya、Ide Takahiro、Yamamoto Takaki、Shibata Tatsuo、Onoue Kenta、Okayama Satoko、Yonemura Shigenobu、Misaki Kazuyo、Soba Yurina、Kakui Yasutaka、Sato Masamitsu、Toya Mika、Takeichi Masatoshi
    • Journal Title

      Molecular Biology of the Cell

      Volume: 32 Issue: 20 Pages: ar12-ar12

    • DOI

      10.1091/mbc.e21-06-0303

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] RanGTP and the actin cytoskeleton keep paternal and maternal chromosomes apart during fertilization2021

    • Author(s)
      Mori Masashi、Yao Tatsuma、Mishina Tappei、Endoh Hiromi、Tanaka Masahito、Yonezawa Nao、Shimamoto Yuta、Yonemura Shigenobu、Yamagata Kazuo、Kitajima Tomoya S.、Ikawa Masahito
    • Journal Title

      Journal of Cell Biology

      Volume: 220 Issue: 10

    • DOI

      10.1083/jcb.202012001

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 磁気ピンセットを用いたメカノタキシスの詳細解析2024

    • Author(s)
      柴田桂太朗、浅野千帆莉、石田紘基、米村重信
    • Organizer
      第8回日本メカノバイオロジー学会 学術総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 細胞接着装置の形成、成熟とアクチンフィラメントおよび張力2024

    • Author(s)
      米村重信、 Li Shuntao, 甘泉、藤本一帆、栗栖修作
    • Organizer
      第8回日本メカノバイオロジー学会 学術総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 電子顕微鏡による受託解析の現状2023

    • Author(s)
      米村重信
    • Organizer
      順天堂大学・日本電子株式会社合同形態学セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 機械的力を感知した細胞の運動変化と細胞集団に与える影響2023

    • Author(s)
      浅野千帆莉、柴田桂太郎、石田紘基、米村重信
    • Organizer
      第75回日本細胞生物学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ホスホリパーゼC betaによる上皮細胞極性の調節機構2023

    • Author(s)
      栗栖修作、米村重信
    • Organizer
      第75回日本細胞生物学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 上皮極性形成におけるアクチンリング構造の機能解析2023

    • Author(s)
      柴田桂太朗、米村重信
    • Organizer
      第75回日本細胞生物学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 大腸上皮細胞のin vitro基底膜形成における近接線維芽細胞由来IV型コラーゲンの寄与2022

    • Author(s)
      栗栖 修作、天宅 あや、米村 重信
    • Organizer
      日本細胞生物学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] アクチンフィラメントの流れと上皮細胞頂底極性形成との関係2022

    • Author(s)
      柴田 桂太朗、米村 重信
    • Organizer
      日本細胞生物学会
    • Related Report
      2022 Annual Research Report

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

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