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Molecular clock regulating the timing of cell fate determination

Research Project

Project/Area Number 18K06254
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44020:Developmental biology-related
Research InstitutionOsaka University (2019-2023)
Kyoto University (2018)

Principal Investigator

Shimojo Hiromi  大阪大学, 大学院生命機能研究科, 助教 (40512306)

Project Period (FY) 2018-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords神経幹細胞 / 細胞分化 / 遺伝子発現動態 / ライブイメージング / 光遺伝学 / Notchシグナル / 神経発生 / 神経分化 / Neurogenin / 細胞運命決定 / 分子タイマー
Outline of Final Research Achievements

The timing of neuronal differentiation from neural stem cells is regulated strictly. However, the molecular mechanism controlling the cell fate determination remains largely unknown. The oscillatory expressions of Hes1 and Neurog2 in neural stem cells are important for maintaining neural stem cells. We found that Neurog2 oscillation induced the expression of downstream target gene Tbr2, and Tbr2 protein gradually accumulated in neural stem cells by live-cell imaging. Furthermore, the accumulation of Tbr2 in neural stem cells suppressed the expression of Hes1, leading to the transition of stem cell character and induced neuronal differentiation. These results suggested that Hes1-Neurog2-Tbr2 dynamics regulate the timing of neuronal differentiation.

Academic Significance and Societal Importance of the Research Achievements

本研究は細胞分化が引き起こされる過程においては、幹細胞の性質が徐々に変化していること、またその変化を引き起こす分子機構を明らかにしたものである。この結果は、幹細胞に備わった分化能の分子基盤の理解に貢献するとともに、「細胞のなかでどのように時間の経過が計られ、運命決定のタイミングを制御しているのか?」という発生学の命題を解く手がかりとなる。今後、本研究に続く細胞分化の時間制御機構を司る詳細な分子機構が、さまざまな組織における幹細胞で明らかになれば、基礎研究にとどまらず、細胞治療に用いるための細胞を自由に人工誘導することも可能であり、応用研究、臨床への応用も期待できるものである。

Report

(7 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (22 results)

All 2024 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (4 results) Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 8 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 7 results) Remarks (2 results)

  • [Int'l Joint Research] Max Delbruck Center(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University of Copenhagen(デンマーク)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Sao Paulo(ブラジル)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Max Delbruck Center(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] The Neurog2-Tbr2 axis forms a continuous transition to the neurogenic gene expression state in neural stem cells2024

    • Author(s)
      Shimojo H, Masaki T, Kageyama R.
    • Journal Title

      Dev. Cell

      Volume: 59 Issue: 15 Pages: 1-11

    • DOI

      10.1016/j.devcel.2024.04.019

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Biological Significance of the Coupling Delay in Synchronized Oscillations2023

    • Author(s)
      Kageyama Ryoichiro、Isomura Akihiro、Shimojo Hiromi
    • Journal Title

      Physiology

      Volume: 38 Issue: 2 Pages: 63-72

    • DOI

      10.1152/physiol.00023.2022

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dynamic transcriptional control of neural stem cells2023

    • Author(s)
      Kageyama R., Shimojo H.
    • Journal Title

      Neocortical Neurogenesis in Development and Evolution

      Volume: ch6 Pages: 107-118

    • DOI

      10.1002/9781119860914.ch6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Oscillations of Delta-like1 regulate the balance between differentiation and maintenance of muscle stem cells2021

    • Author(s)
      Zhang Yao、Lahmann Ines、Baum Katharina、Shimojo Hiromi、Mourikis Philippos、Wolf Jana、Kageyama Ryoichiro、Birchmeier Carmen
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 1318-1318

    • DOI

      10.1038/s41467-021-21631-4

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Oscillatory expression of Hes1 regulates cell proliferation and neuronal differentiation in the embryonic brain2020

    • Author(s)
      Ochi S, Imaizumi Y, Shimojo H, Miyachi H, Kageyama R.
    • Journal Title

      Development

      Volume: 147 Pages: 182204-182204

    • DOI

      10.1242/dev.182204

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Real-time Bioluminescence Imaging of Notch Signaling Dynamics during Murine Neurogenesis.2019

    • Author(s)
      Shimojo H and Kageyama R.
    • Journal Title

      J. Vis. Exp.

      Volume: 12 Issue: 154

    • DOI

      10.3791/60455

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dynamic control of neural stem cells by bHLH factors2019

    • Author(s)
      Kageyama Ryoichiro、Shimojo Hiromi、Ohtsuka Toshiyuki
    • Journal Title

      Neuroscience Research

      Volume: 138 Pages: 12-18

    • DOI

      10.1016/j.neures.2018.09.005

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Oscillatory control of Notch signaling in development2018

    • Author(s)
      Kageyama R, Shimojo H, Isomura A.
    • Journal Title

      Adv. Exp. Med. Biol.

      Volume: 1066 Pages: 265-277

    • DOI

      10.1007/978-3-319-89512-3_13

    • ISBN
      9783319895116, 9783319895123
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Hes1-Neurog2-Tbr2 dynamics regulate the timing of neuronal differentiation via down-regulation of Notch signaling2022

    • Author(s)
      Hiromi Shimojo and Ryoichiro Kageyama
    • Organizer
      第45回 日本分子生物学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Gene expression dynamics regulate the timing of down-regulation of Notch signaling and neuronal differentiation.2020

    • Author(s)
      Hiromi Shimojo
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Gene expression dynamics regulating the timing of neuronal differentiation during mammalian neural development2020

    • Author(s)
      Hiromi Shimojo
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Gene expression dynamics regulating neuronal differentiation2019

    • Author(s)
      Hiromi Shimojo
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Gene expression dynamics regulating the timing of neuronal differentiation during mammalian neural development2019

    • Author(s)
      Hiromi Shimojo
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Oscillations of Notch signaling in cell-cell interactions regulate dynamic gene expression networks and tissue morphogenesis2019

    • Author(s)
      Hiromi Shimojo
    • Organizer
      第52回日本発生生物学会大会
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dynamic gene expressions during neural development2018

    • Author(s)
      Hiromi Shimojo
    • Organizer
      22nd Biennial Meeting of the International Society for Developmental Neuroscience
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Dynamic gene expressions during mammalian neural development2018

    • Author(s)
      Hiromi Shimojo
    • Organizer
      2018 Korea-Japan Joint Symposium on Neurodevelopment
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Remarks]

    • URL

      https://www.sciencedirect.com/science/article/pii/S1534580720300162?via%3Dihub

    • Related Report
      2019 Research-status Report
  • [Remarks]

    • URL

      https://www.nature.com/articles/s41380-020-0717-5

    • Related Report
      2019 Research-status Report

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Published: 2018-04-23   Modified: 2025-01-30  

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