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Chk1 function in normal cell cycle and cell viability

Research Project

Project/Area Number 18K06927
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 48040:Medical biochemistry-related
Research InstitutionMie University

Principal Investigator

GOTO Hidemasa  三重大学, 医学系研究科, 教授 (20393126)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsチェックポイントキナーゼ1(Chk1) / 細胞生存 / 細胞周期 / チェックポイント / チェックポイントキナーゼ1 / Chk1
Outline of Final Research Achievements

Chk1 is an evolutionally conserved protein kinase that transduces checkpoint signals from ATR to Cdc25A during DNA damage response (DDR). In mammals, Chk1 also controls cellular proliferation even in the absence of exogenous DNA damage. Here, we have established near-diploid HCT116 cell lines containing endogenous Chk1 protein tagged with a minimum auxin-inducible degron (mAID) using a CRISPR/Cas9-based gene editing. Establishment of these cells enabled us to induce specific and rapid depletion of the endogenous Chk1 protein, which resulted in aberrant accumulation of DNA damage factors that induced cell-cycle arrest at S or G2 phase. Cdc25A stabilized upon Chk1 depletion before the accumulation of DNA damage factors. Simultaneous depletion of Chk1 and Cdc25A partially suppressed the defects caused by Chk1 single depletion. These results indicate that, similar to its function in DDR, Chk1 controls normal cell-cycle progression mainly by inducing Cdc25A degradation.

Academic Significance and Societal Importance of the Research Achievements

Chk1抑制による殺細胞効果は、正常細胞よりがん細胞において顕著であるため、多くの薬剤会社がChk1阻害剤を抗がん治療の分子標的薬として開発を続けている。そのため、Chk1を介した細胞生存シグナルの解明は、なぜ、Chk1阻害剤ががん細胞により効果的なのかを明らかにするうえでも重要であるが、その詳細はほとんど解明されていなかった。当研究により、DNA損傷を受けた細胞と受けていない細胞でChk1の下流のシグナル伝達経路が大きく変化しないことが明らかになった。このことは、Chk1阻害剤を臨床現場で応用していく際に正常細胞への損傷も常に考慮すべきであることを強く示唆しているものといえる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (9 results)

All 2021 2020 2019 2018

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (4 results) (of which Invited: 1 results) Book (1 results)

  • [Journal Article] Cdc7 kinase stimulates Aurora B kinase in M-phase2019

    • Author(s)
      Ito Sayuri、Goto Hidemasa、Kuniyasu Kinue、Shindo Mayumi、Yamada Masayuki、Tanaka Kozo、Toh Gaik-Theng、Sawa Masaaki、Inagaki Masaki、Bartek Jiri、Masai Hisao
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 18622-18622

    • DOI

      10.1038/s41598-019-54738-2

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Chk1-mediated Cdc25A degradation as a critical mechanism for normal cell cycle progression.2019

    • Author(s)
      Goto H., Natsume T., Kanemaki M.T., Kaito A., Wang S., Gabazza E.C., Inagaki M., Mizoguchi A.
    • Journal Title

      J. Cell Sci.

      Volume: 132 Issue: 2

    • DOI

      10.1242/jcs.223123

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Regulation of keratin 5/14 intermediate filaments by CDK1, Aurora-B, and Rho-kinase2018

    • Author(s)
      Inaba H, Yamakawa D, Tomono Y, Enomoto A, Mii S, Kasahara K, Goto H, Inagaki M
    • Journal Title

      Biochem Biophys Res Commun

      Volume: 498 Issue: 3 Pages: 544-550

    • DOI

      10.1016/j.bbrc.2018.03.016

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tetraploidy in cancer and its possible link to aging.2018

    • Author(s)
      Tanaka K., Goto H., Nishimura Y., Kasahara K., Mizoguchi A., Inagaki M
    • Journal Title

      Cancer Sci.

      Volume: 109 Pages: 2632-2640

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 生体染色を用いた腸管細胞構造の可視化(光バイオプシ)技術の開発2021

    • Author(s)
      王淑杰、垣内愛加、木村一志、田中光司、田中匡介、後藤英仁、溝口明
    • Organizer
      第126回日本解剖学会・第98回生理学会合同大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 生体染色を用いた腸管細胞構造の可視化(光バイオプシ)技術の開発2020

    • Author(s)
      王淑杰、垣内愛加、木村一志、田中光司、田中匡介、後藤英仁、溝口明
    • Organizer
      日本解剖学会 第80回中部支部学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 組織特異的四倍体化マウスの解剖学的解析ー細胞の多核化と個体老化の連関ー2019

    • Author(s)
      後藤英仁、王淑杰、垣内愛加、稲垣昌樹、溝口明
    • Organizer
      第124回日本解剖学会総会
    • Related Report
      2018 Research-status Report
  • [Presentation] Tetraploidy in cancer and aging2018

    • Author(s)
      Hidemasa Goto, Akira Mizoguchi, Masaki Inagaki
    • Organizer
      第77回日本癌学会総会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Book] Encyclopedia of Signaling Molecules, 2nd edition, ed. Choi S2018

    • Author(s)
      Goto H., Inaba H., Inagaki M.
    • Total Pages
      7
    • Publisher
      Springer New York
    • ISBN
      9783319671987
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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