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Principle of chronic centrosome aberrations in whole-genome duplicated cells and its contribution to cellular heterogeneity

Research Project

Project/Area Number 19H03219
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 44010:Cell biology-related
Research InstitutionHokkaido University

Principal Investigator

Uehara Ryota  北海道大学, 先端生命科学研究院, 准教授 (20580020)

Co-Investigator(Kenkyū-buntansha) 塚田 祐基  名古屋大学, 理学研究科, 助教 (80580000)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2019: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Keywords染色体倍加 / 中心体 / 倍数性 / 細胞分裂 / がん / ガン
Outline of Research at the Start

過剰数の中心体は腫瘍形成を引き起こす主要な細胞異常であるが、余剰中心体がどのような仕組みで発生し、病態にどう寄与するかは不明である。本研究では、申請者が最近発見した「染色体倍加に伴う慢性的中心体増大および複製亢進現象」の発生原理を解明し、それが腫瘍形成で果たす病理的寄与を理解することを目的とする。細胞イメージングと網羅的遺伝子探索を組み合わせたアプローチで染色体倍加により中心体複製亢進が惹起される分子経路を明らかにし、慢性的中心体異常が細胞不均一性に及ぼす長期的影響を検証する。これにより、一細胞内で起こる中心体制御異常現象と、組織レベルで生じる細胞不均一性の間の因果関係と作用原理を解明する。

Outline of Final Research Achievements

In this study, we aimed to elucidate the principle and significance of centrosome hyperactivation associated with whole-genome duplication (WGD), a cellular abnormality common in 30% of cancers. We found that this phenomenon is caused by an increase in the accumulation of centrosomal proteins resulting from the doubling of the gene dosage of a centrosome scaffolding gene upon WGD. By developing a method to cancel this centrosome hyperactivation artificially, we found that this phenomenon does not play an adaptive role in the proliferation control of WGD cells. However, contrary to our initial expectation, we found that the centrosome hyperactivation made WGD cells more fragile in centrosomal structural homeostatic regulation, suggesting the feasibility of WGD cell-selective suppression through targeting their fragility.

Academic Significance and Societal Importance of the Research Achievements

染色体倍加は個体発生、疾病、進化など多様なプロセスを駆動する細胞現象であり、染色体倍加が細胞機能を変化させる過程とその原理の解明は、これら広範な生命プロセスを理解し制御するために欠かすことができない。本研究は、染色体倍加細胞が引き起こす具体的細胞制御変化として中心体構造制御の脆弱化を突き止め、その分子基盤を明らかにした点に学術的意義がある。さらに、この脆弱性を標的とすることで、疾病の要因となりうる染色体倍加細胞の選択的な細胞分裂阻害が可能であることを示した点に医学面での社会的意義がある。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (13 results)

All 2022 2021 2020 Other

All Int'l Joint Research (4 results) Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (3 results) (of which Invited: 3 results)

  • [Int'l Joint Research] Semmelweis University(ハンガリー)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Tata Institute of Fundamental Research(インド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Semmelweis University(ハンガリー)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Tata Institute of Fundamental Research(インド)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Low-invasive 5D visualization of mitotic progression by two-photon excitation spinning-disk confocal microscopy2022

    • Author(s)
      Kamada Takafumi、Otomo Kohei、Murata Takashi、Nakata Kaito、Hiruma Shota、Uehara Ryota、Hasebe Mitsuyasu、Nemoto Tomomi
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 1-10

    • DOI

      10.1038/s41598-021-04543-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ultrastructural Characteristics of Finger-Like Membrane Protrusions in Cell Competition2022

    • Author(s)
      Kamasaki Tomoko、Uehara Ryota、Fujita Yasuyuki
    • Journal Title

      Microscopy

      Volume: in press Issue: 4 Pages: 195-205

    • DOI

      10.1093/jmicro/dfac017

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Molecular basis of functional exchangeability between ezrin and other actin-membrane associated proteins during cytokinesis2021

    • Author(s)
      Yang Guang、Hiruma Shota、Kitamura Akira、Kinjo Masataka、Mishra Mithilesh、Uehara Ryota
    • Journal Title

      Experimental Cell Research

      Volume: 403 Issue: 2 Pages: 112600-112600

    • DOI

      10.1016/j.yexcr.2021.112600

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mevalonate Pathway-mediated ER Homeostasis Is Required for Haploid Stability in Human Somatic Cells2021

    • Author(s)
      Yaguchi Kan、Sato Kimino、Yoshizawa Koya、Mikami Daisuke、Yuyama Kohei、Igarashi Yasuyuki、Banhegyi Gabor、Margittai Eva、Uehara Ryota
    • Journal Title

      Cell Structure and Function

      Volume: 46 Issue: 1 Pages: 1-9

    • DOI

      10.1247/csf.20055

    • NAID

      130007988144

    • ISSN
      0386-7196, 1347-3700
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Uncoupling of DNA Replication and Centrosome Duplication Cycles Is a Primary Cause of Haploid Instability in Mammalian Somatic Cells2020

    • Author(s)
      Yoshizawa Koya、Yaguchi Kan、Uehara Ryota
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 8 Pages: 1-9

    • DOI

      10.3389/fcell.2020.00721

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Photoswitchable CENP-E Inhibitor Enabling the Dynamic Control of Chromosome Movement and Mitotic Progression2020

    • Author(s)
      Noushaba Nusrat Mafy, Kazuya Matsuo, Shota Hiruma, Ryota Uehara, Nobuyuki Tamaoki
    • Journal Title

      Journal of the American Chemical Society

      Volume: 142 Issue: 4 Pages: 1763-1767

    • DOI

      10.1021/jacs.9b12782

    • NAID

      120006955185

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 動物非二倍体細胞における細胞分裂障害の発生機序2021

    • Author(s)
      上原亮太
    • Organizer
      第80回 日本癌学会学術総会 シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 動物生活感を特徴づける”倍数性・中心体リンク”2021

    • Author(s)
      上原亮太
    • Organizer
      第94回日本生化学会大会 シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Ploidy-linked alterations in mitotic spindle polarity impact the long-term ploidy dynamics in mammalian cells2020

    • Author(s)
      上原亮太
    • Organizer
      第43回日本分子生物学会年会 シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited

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Published: 2019-04-18   Modified: 2023-01-30  

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