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Super-resolution imaging analysis of the novel actin structure found on the centrosome during ciliogenesis.

Research Project

Project/Area Number 19K06644
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44010:Cell biology-related
Research InstitutionOsaka City University

Principal Investigator

Chiba Shuhei  大阪市立大学, 大学院医学研究科, 講師 (60572493)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords一次繊毛 / 繊毛病 / 繊毛小胞 / 膨張顕微鏡 / 超解像イメージング / サブオルガネラスケール / アクチン細胞骨格 / トランジションゾーン / 繊毛内輸送 / 基底小体 / 膨張顕微鏡法 / アクチン / Distal appendage / 移行帯 / CRISPR/Cas9 / 繊毛症 / 超解像顕微鏡 / 親中心小体-基底小体変換 / CPLANE
Outline of Research at the Start

非運動性の突起構造である一次繊毛は細胞外の化学的・機械的シグナルを受容するアンテナとして働く。その機能的・構造的欠陥は網膜変性や嚢胞性腎疾患、肥満や多指などの症状を複合的に呈する遺伝性疾患 (繊毛症)と密接に関連することから、一次繊毛の形成や機能構築を担う分子基盤の全貌解明が早急に望まれる。
本研究では当該研究期間中に、超解像イメージング技術を駆使して中心体近傍に見出した特徴的なアクチン構造について、その構築・機能調節機構を明らかにし、一次繊毛形成を担う新たな分子基盤の解明を目指す。本研究の進展は、繊毛形成不全に由来する各種繊毛症の発症メカニズム理解に繋がることが期待される。

Outline of Final Research Achievements

Expansion microscopy (ExM) is a novel superresolution (SR) technique that uses a swellable hydrogel that enables the physical expansion of specimens. In this study, we applied ExM to observe ciliary and centriolar proteins and compared the acquired images with those obtained using structured illumination microscopy. We also established multi-color SR imaging with the outstanding optical resolution achieved by the combinatorial use of ExM and airyscan microscopy. Using this imaging technique, we analyzed a novel actin skeleton found in the vicinity of the centrosome and examined its role in ciliogenesis. Although we could not find the molecular systems that control the centriolar actin structures, ExM-Airyscan made it possible to analyze the spatial arrangement of cilia-associated molecules during ciliogenesis.

Academic Significance and Societal Importance of the Research Achievements

繊毛は機械的・化学的刺激などの細胞外環境を受容するアンテナとして働く。その構造や機能の異常は発生期の形態異常、嚢胞性腎疾患、網膜変性を複合的に呈する遺伝性疾患 (繊毛症)の発症と密接に関連しており、繊毛構築を制御するシグナル経路の解明は医学的に早急な解決が望まれる研究命題である。本研究で焦点を当てる中心体近傍のアクチン構造は現時点で繊毛機能に与える影響は不明であるが、未知のアクチン構造の働きの理解により一次繊毛にとどまらず、紡錘体構築や細胞移動時の極性形成、免疫シナプス形成など、中心体とアクチンの相互作用が鍵を握ると想定される細胞活動での中心体制御機構の理解に繋がる可能性も考えられる。

Report

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

    (9 results)

All 2021 2020 2019 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (3 results) (of which Invited: 2 results) Remarks (1 results)

  • [Journal Article] ARL3 and ARL13B GTPases participate in distinct steps of INPP5E targeting to the ciliary membrane2021

    • Author(s)
      Fujisawa Sayaka、Qiu Hantian、Nozaki Shohei、Chiba Shuhei、Katoh Yohei、Nakayama Kazuhisa
    • Journal Title

      Biology Open

      Volume: 10 Issue: 9

    • DOI

      10.1242/bio.058843

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Molecular basis of ciliary defects caused by compound heterozygous IFT144/WDR19 mutations found in cranioectodermal dysplasia2021

    • Author(s)
      Ishida Yamato、Kobayashi Takuya、Chiba Shuhei、Katoh Yohei、Nakayama Kazuhisa
    • Journal Title

      Human Molecular Genetics

      Volume: - Issue: 3-4 Pages: 213-225

    • DOI

      10.1093/hmg/ddab034

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Formation of the B9-domain protein complex MKS1?B9D2?B9D1 is essential as a diffusion barrier for ciliary membrane proteins2020

    • Author(s)
      Okazaki Misato、Kobayashi Takuya、Chiba Shuhei、Takei Ryota、Liang Luxiaoxue、Nakayama Kazuhisa、Katoh Yohei
    • Journal Title

      Molecular Biology of the Cell

      Volume: 31 Issue: 20 Pages: 2259-2268

    • DOI

      10.1091/mbc.e20-03-0208

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Practical method for superresolution imaging of primary cilia and centrioles by expansion microscopy using an amplibody for fluorescence signal amplification2020

    • Author(s)
      Katoh Yohei、Chiba Shuhei、Nakayama Kazuhisa
    • Journal Title

      Molecular Biology of the Cell

      Volume: 31 Issue: 20 Pages: 2195-2206

    • DOI

      10.1091/mbc.e20-04-0250

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Cep128 associates with Odf2 to form the subdistal appendage of the centriole2019

    • Author(s)
      Kashihara Hiroka、Chiba Shuhei、Kanno Shin-ichiro、Suzuki Koya、Yano Tomoki、Tsukita Sachiko
    • Journal Title

      Genes to Cells

      Volume: 24 Issue: 3 Pages: 231

    • DOI

      10.1111/gtc.12668

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 超解像イメージングを駆使した一次繊毛トランジション・ゾーンの構築様式の解析2021

    • Author(s)
      千葉秀平、加藤洋平、中山和久
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 繊毛形成と繊毛内タンパク質の輸送基盤2021

    • Author(s)
      中山和久、加藤洋平、千葉秀平
    • Organizer
      第94回日本生化学会大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 繊毛膜タンパク質に対する拡散障壁を構成するB9ドメインタンパク質複合体の役割2020

    • Author(s)
      加藤洋平, 岡崎美聖, 千葉秀平, 中山和久
    • Organizer
      第72回日本細胞生物学会大会
    • Related Report
      2020 Research-status Report
  • [Remarks] Imaging cilia below the diffraction limit

    • URL

      https://blogs.zeiss.com/microscopy/en/superresolution-cilia-centrioles/

    • Related Report
      2020 Research-status Report

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

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