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Development of a novel treatment for refractory ovarian clear cell carcinoma by targeting cell cycle monitoring mechanism

Research Project

Project/Area Number 18K09235
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56040:Obstetrics and gynecology-related
Research InstitutionNational Cancer Center Japan (2019-2020)
Nara Medical University (2018)

Principal Investigator

Tanase Yasuhito  国立研究開発法人国立がん研究センター, 中央病院, 医員 (20423915)

Co-Investigator(Kenkyū-buntansha) 山田 有紀  奈良県立医科大学, 医学部, 助教 (20588537)
小林 浩  奈良県立医科大学, 医学部, 研究員 (40178330)
川口 龍二  奈良県立医科大学, 医学部, 准教授 (50382289)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords細胞周期監視機構 / HNF-1beta / USP28 / Claspin / Chk1 / DNA damage response / 卵巣明細胞癌 / CLASPIN / 卵巣癌 / チェックポイント / 明細胞癌治療
Outline of Final Research Achievements

Transcription factor hepatocyte nuclear factor 1-beta (HNF-1β) enhances checkpoint kinase 1 (Chk1) activation and promotes G2/M cell cycle progression in ovarian clear cell carcinoma (CCC) following exposure to diverse genotoxic agents including bleomycin. Loss-of-function studies using RNAi-mediated gene silencing indicated that HNF-1β facilitated the Claspin expression after treatment with a genotoxic agent bleomycin, resulting in accumulation of phosphorylated Chk1 (p-Chk1) and promotion of survival in CCC cell lines. This study showed for the first time that USP28, a de-ubiquitinase crucial for Claspin expression, is one target gene of HNF-1β. Knockdown of endogenous USP28 suppressed the Claspin expression and p-Chk1 activation and cell viability.
Our findings identify a novel pathway of the HNF-1β―USP28―Claspin―Chk1 axis in checkpoint signal amplification in response to DNA damage. Targeting this pathway may represent a putative, novel, anticancer strategy in ovarian CCC.

Academic Significance and Societal Importance of the Research Achievements

卵巣明細胞癌は細胞周期監視機構の異常によって抗癌剤に対する治療抵抗性を獲得していることが示唆されている。本研究により、細胞周期監視機構に異常を誘発する原因の1つとされるHNF-1β-USP28-Claspin-Chk1経路を阻害することで、卵巣明細胞癌の抗癌剤への感受性が増幅することが示された。
細胞周期監視機構を標的とした治療法が確立されることにより、従来、予後不良とされていた卵巣明細胞癌に対する化学療法の治療成績の向上が見込まれる。

Report

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

    (5 results)

All 2019 2018

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

  • [Journal Article] The HNF-1β―USP28―Claspin pathway upregulates DNA damage-induced Chk1 activation in ovarian clear cell carcinoma.2018

    • Author(s)
      Ito F, Yoshimoto C, Yamada Y, Sudo T, Kobayashi H.
    • Journal Title

      Oncotarget

      Volume: 9(25) Pages: 17512-17522

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] HNF-1beta 強発現を呈する卵巣明細胞癌に対する合成致死候補の検索2019

    • Author(s)
      河原直紀,竹田善紀, 松原 翔, 山田有紀,小林 浩
    • Organizer
      第24回日本病態プロテアーゼ学会学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] 卵巣明細胞癌において転写因子HNF-1βはUSP28の発現を介するCLASPINの分解抑制によりChk1のリン酸化を維持させる2018

    • Author(s)
      河原直紀,山田有紀,小川憲二,佐道俊幸,小林 浩
    • Organizer
      第17回日本婦人科がん分子標的研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] 卵巣明細胞癌におけるリン酸化の維持においてHNF-1beta-USP28-Claspin経路は重要である2018

    • Author(s)
      河原直紀,小川憲二,山田有紀,吉元千陽,川口龍二,小林 浩
    • Organizer
      第77回日本癌学会学術総会
    • Related Report
      2018 Research-status Report
  • [Presentation] The HNF-1β-USP28-CLASPIN pathway upregulates Chk1 phosphrylation induced by DNA damage in ovarian clear cell carcinoma.2018

    • Author(s)
      Kawahara N, Yamada Y, Yoshimoto C, Kawaguchi R, Sado T, Kobayashi H
    • Organizer
      The 17th Biennial Meeting of the International Gynecologic Cancer Society (IGCS2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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

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