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

Defective syste-level regulation of Aurora B underlies chromosomal instability

Research Project

Project/Area Number 19K16727
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionJapanese Foundation for Cancer Research

Principal Investigator

JO Minji  公益財団法人がん研究会, がん研究所 実験病理部, 研究員 (80808866)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords染色体異数体化 / 染色体不安定性 / Aurora Bキナーゼ / non-coding RNA / HP1 / Aneuploidy / Chromosomal instability / Non-coding RNA / CPC / Aurora B kinase / aneuploidy / chromosomal instability
Outline of Research at the Start

HP1は染色体パッセンジャー複合体(CPC; Chromosomal Passenger Complex)に結合しCPCの活性を増強する。がん細胞ではこのHP1のCPCに結合する量が低下していることが分かったが、HP1によるCPC活性の減少がどのように「染色体不安定性」を発生させ、いかにがんの悪性化に寄与しうるのかは未だに不明である。本研究では、異数体細胞の導入とncRNAの関与を見いだして、染色体不安定性とCPC機能との関係、がん細胞でHP1の結合量が減少する原因を明らかにする。続いてがん幹細胞系列でCPCシステムの破綻とがんの悪性化の関連性を検討し染色体不安定性の病理機構を明らかにしたい。

Outline of Final Research Achievements

Chromosomal passenger complex (CPC) ensures accurate chromosomal segregations during mitosis through releasing incorrect attachments of kinetochores and centromeres. We previously reported that the function of CPC is allosterically increased by interaction with heterochromatin protein 1 (HP1) and the amount of HP1-bound CPC is decreased in a wide of cancer cells. Here, we aimed to understand the reduction of HP1-involvement in cancer cells and found that the extent of HP1 assembly at centromeres is closely related to ploidy alteration and transcriptional regulation, affecting chromosomal instability in cancer cells.

Academic Significance and Societal Importance of the Research Achievements

細胞分裂期における頻繁な染色体分配の失敗は染色体不安定性と呼ばれ、がんの治療抵抗性や予後と相関する。また、がんの進展とともに多く見られる特徴であることから、このがんの性質に着目した研究成果は、進行がんの診断・治療への応用が強く期待される。本研究によって、正確な染色体分配を維持する染色体パセンジャー複合体(CPC)の機能制御において、染色体異数体化と転写の関連性が見出され、がん細胞の染色体不安定性を引き起こす機構を理解する手がかりとなる知見を得た。

Report

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

    (10 results)

All 2022 2021 2020 2019

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Profiling chromosomal‐level variations in gastric malignancies2022

    • Author(s)
      Negoto Tetsuya、Jo Minji、Nakayama Izuma、Morioka Motohiro、Takeuchi Kengo、Kawachi Hiroshi、Hirota Toru
    • Journal Title

      Cancer Science

      Volume: 113 Issue: 11 Pages: 3864-3876

    • DOI

      10.1111/cas.15544

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Unraveling pathologies underlying chromosomal instability in cancers2021

    • Author(s)
      Jo Minji、Kusano Yoshiharu、Hirota Toru
    • Journal Title

      Cancer Science

      Volume: 112 Issue: 8 Pages: 2975-2983

    • DOI

      10.1111/cas.14989

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The plastic regulation of mitotic chromosome segregation in cancer cells facilitates acquisition of malignant phenotypes2022

    • Author(s)
      Minji Jo
    • Organizer
      第81回日本癌学会学術総会
    • Related Report
      2022 Annual Research Report
  • [Presentation] がん細胞における染色体動態の可塑性制御とその病理学的意義2022

    • Author(s)
      趙民知
    • Organizer
      第45回日本分子生物学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Chromosome-level variations shape the malignant phenotypes in gastric tumors2022

    • Author(s)
      Minji Jo
    • Organizer
      12th AACR-JCA Joint Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] がん幹細胞の核型変動を誘導する染色体動態制御の可塑性2021

    • Author(s)
      趙民知
    • Organizer
      第80回日本癌学会学術総会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] The plastic regulation of chromosome segregation in cancer stem cells2021

    • Author(s)
      趙民知
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Aurora Bキナーゼの可塑的制御によるがん幹細胞の核型変動2021

    • Author(s)
      Minji Jo
    • Organizer
      第38回染色体ワークショップ&第19回核ダイナミクス研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] Defective mitotic regulation facilitates karyotypic evolution of cancer stem cells2020

    • Author(s)
      Minji Jo
    • Organizer
      The 79th Annual Meeting of the Japanese Cancer Association
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] がん細胞の悪性化における染色体不安定性の病理機構2019

    • Author(s)
      趙民知
    • Organizer
      第78回日本癌学会学術総会
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi