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Analysis of mechanisms for spindle bipolarization in mammalian oocytes

Research Project

Project/Area Number 21H02407
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Kitajima Tomoya  国立研究開発法人理化学研究所, 生命機能科学研究センター, チームリーダー (00376641)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2022: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2021: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords卵子 / イメージング / 染色体 / 紡錘体 / 動原体 / 微小管 / 卵母細胞 / 染色体分配
Outline of Research at the Start

二極性紡錘体の形成は染色体分配に必須である。中心体を持たない卵母細胞では、微小管の自己集合により二極性紡錘体が確立すると考えられている。この過程において微小管重合の活性化の土台となるのは染色体であるが、紡錘体二極化の土台の機構は知られていない。最近我々は、動原体が紡錘体二極化に必須であることを報告した。本研究では、動原体が土台となり紡錘体を二極化させる分子機構を明らかにする。具体的には、
1) 紡錘体の二極化を定量的に評価する系を確立する
2) 動原体が足場となり紡錘体を二極化させる分子機構を明らかにする
3) 動原体を足場とする機構のin vitro再構成を行う

Outline of Final Research Achievements

This study aimed to reveal the molecular mechanism for spindle bipolarization in oocytes. We focused on mechanisms based on NDC80, a kinetochore protein required for spindle bipolarization in mouse oocytes. We found that the inhibition of the kinetochore kinase MPS1 impairs spindle bipolarization when NDC80 phosphomimetic mutations that reduce microtubule-binding activity are introduced. We showed that MPS1 phosphorylates the C-terminal domain of NDC80 and the microtubule cross-linker PRC1. MPS1 inhibition significantly delayed spindle bipolarization, which caused kinetochore-microtubule attachment errors.

Academic Significance and Societal Importance of the Research Achievements

卵母細胞の減数分裂の過程における染色体分配のエラーは卵子の染色体数異常を引き起こす。卵子の染色体数異常は不妊、流産、ダウン症など先天性疾患の原因である。本研究の結果は、マウス卵母細胞は動原体が微小管接続エラーを回避するために紡錘体二極化を促進するメカニズムを有していることを示している。この発見は、ヒト卵母細胞にこれと類似のメカニズムが存在するかという研究を誘起するものであり、生殖医療研究を経て将来の生殖補助医療等への貢献が期待される。学術的には、中心体のない卵母細胞が紡錘体の二極性を確立するための特異的なメカニズムの発見として位置づけられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (33 results)

All 2024 2023 2022 2021 Other

All Journal Article (9 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (20 results) (of which Int'l Joint Research: 8 results,  Invited: 18 results) Remarks (4 results)

  • [Journal Article] 老化とともに崩壊する卵母細胞の染色体制御2024

    • Author(s)
      竹之内修、北島智也
    • Volume
      42
    • Pages
      403
    • DOI

      10.18958/7407-00001-0001143-00

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Maternal epigenetic factors in embryonic and postnatal development2023

    • Author(s)
      Nishimura Hiromi、Ikawa Yayoi、Kajikawa Eriko、Shimizu‐Mizuno Natsumi、Hiver Sylvain、Tabata‐Okamoto Namine、Mori Masashi、Kitajima Tomoya、Hayashi Tetsutaro、Yoshimura Mika、Umeda Mana、Nikaido Itoshi、Kurokawa Mineo、Watanabe Toshio、Hamada Hiroshi
    • Journal Title

      Genes to Cells

      Volume: 28 Issue: 6 Pages: 422-432

    • DOI

      10.1111/gtc.13024

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Epigenetic regulation limits competence of pluripotent stem cell‐derived oocytes2023

    • Author(s)
      Aizawa Eishi、Ozonov Evgeniy A、Kawamura Yumiko K、Dumeau Charles‐Etienne、Nagaoka So、Kitajima Tomoya S、Saitou Mitinori、Peters Antoine HFM、Wutz Anton
    • Journal Title

      The EMBO Journal

      Volume: 42 Issue: 23

    • DOI

      10.15252/embj.2023113955

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The large cytoplasmic volume of oocyte2023

    • Author(s)
      Kyogoku Hirohisa、Kitajima Tomoya S
    • Journal Title

      Journal of Reproduction and Development

      Volume: 69 Issue: 1 Pages: 1-9

    • DOI

      10.1262/jrd.2022-101

    • ISSN
      0916-8818, 1348-4400
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generation of functional oocytes from male mice in vitro2023

    • Author(s)
      Murakami Kenta、Hamazaki Nobuhiko、Hamada Norio、Nagamatsu Go、Okamoto Ikuhiro、Ohta Hiroshi、Nosaka Yoshiaki、Ishikura Yukiko、Kitajima Tomoya S.、Semba Yuichiro、Kunisaki Yuya、Arai Fumio、Akashi Koichi、Saitou Mitinori、Kato Kiyoko、Hayashi Katsuhiko
    • Journal Title

      Nature

      Volume: 615 Issue: 7954 Pages: 900-906

    • DOI

      10.1038/s41586-023-05834-x

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Birth of mice from meiotically arrested spermatocytes following biparental meiosis in halved oocytes2022

    • Author(s)
      Narumi Ogonuki, Hirohisa Kyogoku, Toshiaki Hino, Yuki Osawa, Yasuhiro Fujiwara, Kimiko Inoue, Tetsuo Kunieda, Seiya Mizuno, Hiroyuki Tateno, Fumihiro Sugiyama, Tomoya S. Kitajima, Atsuo Ogura
    • Journal Title

      EMBO Rep

      Volume: 5;23(7) Issue: 7

    • DOI

      10.15252/embr.202254992

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stable kinetochore-microtubule attachments restrict MTOC position and spindle elongation in oocytes2021

    • Author(s)
      Courtois Aurelien、Yoshida Shuhei、Takenouchi Osamu、Asai Kohei、Kitajima Tomoya S
    • Journal Title

      EMBO reports

      Volume: 22 Issue: 4

    • DOI

      10.15252/embr.202051400

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Single‐oocyte transcriptome analysis reveals aging‐associated effects influenced by life stage and calorie restriction2021

    • Author(s)
      Mishina Tappei、Tabata Namine、Hayashi Tetsutaro、Yoshimura Mika、Umeda Mana、Mori Masashi、Ikawa Yayoi、Hamada Hiroshi、Nikaido Itoshi、Kitajima Tomoya S.
    • Journal Title

      Aging Cell

      Volume: 20 Issue: 8

    • DOI

      10.1111/acel.13428

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] RanGTP and the actin cytoskeleton keep paternal and maternal chromosomes apart during fertilization2021

    • Author(s)
      Mori Masashi、Yao Tatsuma、Mishina Tappei、Endoh Hiromi、Tanaka Masahito、Yonezawa Nao、Shimamoto Yuta、Yonemura Shigenobu、Yamagata Kazuo、Kitajima Tomoya S.、Ikawa Masahito
    • Journal Title

      Journal of Cell Biology

      Volume: 220 Issue: 10

    • DOI

      10.1083/jcb.202012001

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 卵子の染色体数異常のメカニズム2024

    • Author(s)
      北島 智也
    • Organizer
      第7回Chubu Cytogenetics Conference(CCC)
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 卵子の染色体数異常のメカニズム2024

    • Author(s)
      北島 智也
    • Organizer
      第4回有性生殖研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Chromosome dynamics and aneuploidy in mammalian oocytes2024

    • Author(s)
      Kitajima Tomoya
    • Organizer
      RIKEN International Symposium on Nuclear Structure and Function 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Visualizing chromosome-specific dynamics in oocytes2023

    • Author(s)
      Kitajima Tomoya
    • Organizer
      IGH Summer School, Montpellier University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Mechanisms of chromosome segregation errors in oocytes2023

    • Author(s)
      Kitajima Tomoya
    • Organizer
      IGH Summer School, Montpellier University
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The role of the two-pronuclear state in mammalian zygotes2023

    • Author(s)
      Kitajima Tomoya
    • Organizer
      Seminar at Institute of Animal Physiology and Genetics CAS
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 卵子の染色体数異常の細胞生物学的な原因2023

    • Author(s)
      北島 智也
    • Organizer
      第41回日本受精着床学会総会・学術講演会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 卵子の染色体数異常の細胞生物学的な原因2023

    • Author(s)
      北島 智也
    • Organizer
      第26回日本IVF学会学術集会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 生きた卵母細胞における染色体特異的な動態の可視化2023

    • Author(s)
      北島 智也、竹之内 修
    • Organizer
      第96回日本生化学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 卵子の染色体数異常のメカニズム2023

    • Author(s)
      北島 智也
    • Organizer
      新学術領域研究 全能性プログラム:デコーディングからデザインへ 第5回公開シンポジウム
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Functional relevance of the two-pronuclear state in zygotes2022

    • Author(s)
      Tomoya Kitajima
    • Organizer
      EMBO Workshop Chromosome segregation and aneuploidy
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Roles of the two-pronuclear state in zygotes2022

    • Author(s)
      Tomoya Kitajima
    • Organizer
      第23回京都大学生命科学研究科シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 卵母細胞における染色体分配2022

    • Author(s)
      北島 智也
    • Organizer
      第1回 細胞分裂研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 卵子の染色体数異常の細胞生物学的な原因2022

    • Author(s)
      北島 智也
    • Organizer
      EDGE-J(Endocrinology Debate and Global Exchange in Japan)2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Roles of the two-pronuclear state in zygotes2022

    • Author(s)
      Tomoya Kitajima
    • Organizer
      Cold Spring Harbor Laboratory Germ Cells Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Roles of the two-pronuclear state of zygotes2022

    • Author(s)
      Tomoya Kitajima
    • Organizer
      EMBO Workshop "The Cell Cycle: One Engine - Many Cycles"
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Probing chromosome-type-specific dynamics in live oocytes2022

    • Author(s)
      Osamu Takenouchi, Tomoya Kitajima
    • Organizer
      The International Symposium ”Totipotency and Germ Cell Development"
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 卵母細胞における染色体分配2022

    • Author(s)
      北島智也
    • Organizer
      大阪大学蛋白質研究所セミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 卵子における染色体分配と受精にともなう前核形成の機構2021

    • Author(s)
      北島智也
    • Organizer
      第39回日本受精着床学会総会・学術講演会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 哺乳類受精卵における前核サイズの制御とその意味2021

    • Author(s)
      京極博久、多羅間充輔、柴田達夫、北島智也
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Remarks] 理化学研究所 染色体分配研究チームHP

    • URL

      http://chromosegr.riken.jp/index.html

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report 2021 Annual Research Report
  • [Remarks] 理化学研究所生命機能科学研究センターHP 染色体分配研究チーム紹介ページ

    • URL

      https://www.bdr.riken.jp/ja/research/labs/kitajima-t/index.html

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report 2021 Annual Research Report
  • [Remarks] 理化学研究HP 染色体分配研究チーム紹介ページ

    • URL

      https://www.riken.jp/research/labs/bdr/chromo_segr/

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
  • [Remarks] 理化学研究HP 染色体分配研究チーム紹介ページ

    • URL

      https://www.riken.jp/research/labs/bdr/chromo_segr/index.html

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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