• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Robust, time-dependent coordination of tissue growth through cell-cell communications

Research Project

Project/Area Number 19K22423
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 44:Biology at cellular to organismal levels, and related fields
Research InstitutionNagoya University

Principal Investigator

Ohsawa Shizue  名古屋大学, 理学研究科, 教授 (80515065)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords組織成長 / 細胞間相互作用 / 成長遅延 / ショウジョウバエ / 発生時間軸
Outline of Research at the Start

多細胞生物の個体発生は、時間軸に沿った精密かつ計画的な形作りのプロセスである。種々の内的・外的撹乱により、個体発生の時間軸に歪みが生じた際、その歪みを補正する頑健な仕組みが存在すると考えられるが、その実体は不明である。当研究室は最近、幼虫期のショウジョウバエが内的・外的撹乱によって成長遅延を起こした際に、その遅延(時間軸の歪み)を補正する細胞集団挙動「細胞ターンオーバー(細胞死と細胞増殖による細胞の入れ替え)」が翅原基で誘発されることを見いだした。本研究では、RNA-seqや遺伝学的スクリーニングを起点とした遺伝学的解析を行い、この未知の細胞集団挙動の分子基盤とその役割を明らかにする。

Outline of Final Research Achievements

Highly reproducible tissue development is achieved by robust, time-dependent coordination of cell proliferation and cell death. To study the mechanisms underlying robust tissue growth, we analyzed the developmental process of larval Drosophila Minute mutants, a series of mutants for a ribosomal protein gene, which show significantly prolonged larval period but develop into normal flies. Surprisingly, we found that both cell death and compensatory cell proliferation were dramatically increased in developing wing discs of Minute animals. Blocking the cell-turnover resulted in various morphological defects, indicating the essential role of cell-turnover in Minute wing morphogenesis. Genetic analyses showed that Minute wing discs elevate Wg expression, which cooperates with developmental delay for the induction of cell-turnover. Our findings suggest a novel paradigm for robust coordination of tissue growth by cell-turnover, which is induced when developmental time axis is distorted.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、「細胞集団挙動を介した発生時間軸制御」という、多細胞コミュニティが内包する新しい動的恒常性維持機構の存在を示唆するものであり、発生生物学や、表現型制約の仕組みを解析する進化生物学の発展に大きく貢献し得ると期待される。また興味深いことに、今回モデルとして用いたMinute変異体と同様のリボソームタンパク質遺伝子のヘテロ変異が様々なヒトの疾患(リボソーム病と総称される)を引き起こすことが知られている。今後、分子基盤を明らかにすることで、いまだ大きな謎であるリボソーム病の発症機序の解明とその新たな治療戦略の基盤構築に将来的にはつながり得ると考えられる。

Report

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

    (11 results)

All 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (6 results) (of which Invited: 5 results) Remarks (1 results)

  • [Int'l Joint Research] CSIC-UAM(スペイン)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Epithelial cell-turnover ensures robust coordination of tissue growth in Drosophila ribosomal protein mutants2021

    • Author(s)
      Ohsawa S, Akai N, Sando S, Igaki T
    • Journal Title

      PLoS Genetics

      Volume: 17 Issue: 1 Pages: e1009300-e1009300

    • DOI

      10.1371/journal.pgen.1009300

    • NAID

      120006954062

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] JNK-mediated Slit-Robo signaling facilitates epithelial wound repair by extruding dying cells.2019

    • Author(s)
      Iida C, Ohsawa S, Taniguchi K, Yamamoto M, Morata G, Igaki T
    • Journal Title

      Sci., Rep.

      Volume: 9 Issue: 1 Pages: 19549-19549

    • DOI

      10.1038/s41598-019-56137-z

    • NAID

      120006817614

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Elimination of oncogenic cells that regulate epithelial homeostasis in Drosophila2019

    • Author(s)
      Ohsawa S
    • Journal Title

      Dev. Growth. Differ.

      Volume: 61 Issue: 5 Pages: 337-342

    • DOI

      10.1111/dgd.12604

    • NAID

      120006712295

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Epithelial turn-over through cell competition ensures robust coordination of tissue growth in Drosophila2020

    • Author(s)
      Ohsawa S, Akai N, Sando S, Igaki T
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 細胞ターンオーバーを介した発生ロバストネスの遺伝的基盤2019

    • Author(s)
      大澤志津江
    • Organizer
      第19回 日本タンパク質科学学会年会 第71回 日本細胞生物学会大会 合同大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 折り畳まれた上皮組織から3D形態へと変形を開始するメカニズム2019

    • Author(s)
      大澤志津江
    • Organizer
      第1回日本メカノバイオロジー研究会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Elimination of oncogenic cells through tumor-suppressive cell competition in Drosophila2019

    • Author(s)
      大澤志津江
    • Organizer
      第78回日本癌学会学術総会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 3D morphogenesis of adult appendages from the Folded Epithelial Sheets in Drosophila2019

    • Author(s)
      大澤志津江
    • Organizer
      The 2nd NIBB-Princeton Joint Symposium ”Imaging and Quantitative Biology”
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] ショウジョウバエ成虫原基から外部形態への変形を制御するメカニズムの解明2019

    • Author(s)
      野崎勝也、柳田晃佑、中山萌美、前川絵美、井垣達吏、大澤志津江
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Remarks] 名古屋大学大学院理学研究科生命理学専攻遺伝学グループHP

    • URL

      https://shizueohsawa0412.wixsite.com/ohsawalab

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2019-07-04   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi