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Regulatory mechanisms of primordial follicle activation mediated by RNA-binding proteins

Research Project

Project/Area Number 20H03267
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 44020:Developmental biology-related
Research InstitutionOsaka University (2022-2023)
National Institute of Genetics (2020-2021)

Principal Investigator

Kato Yuzuru  大阪大学, 大学院医学系研究科, 特任講師(常勤) (60570249)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2022: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Keywordsマウス / 原始卵胞 / 卵母細胞 / RNA制御 / 卵子形成 / 卵巣
Outline of Research at the Start

哺乳動物において卵子は、その有限のリザーバーであり、最も未成熟な卵胞である原始卵胞の卵胞成長により産生される。生殖可能期間において女性が継続的に卵子を産生するためには、原始卵胞を長期に渡り維持しながらも、その一部を逐次的に活性化する必要があるが、その制御機構は未だ多くの謎が秘めている。本研究では、卵母細胞における複数のRNA結合タンパク質の機能解析から、原始卵胞の維持と活性化を司るRNA制御機構の解明を目指す。

Outline of Final Research Achievements

This study aimed to understand continuous egg production in the mouse ovary. Particularly, we examined the regulatory mechanisms of the maintenance and growth of primordial follicles, a finite reservoir of eggs in mammalian ovaries, by focusing on two RNA-binding proteins (protein A and B). To examine the role of these RNA-binding proteins, we generated oocyte-specific knockout mice. We found that deletion of gene A results in the loss of oocytes in postnatal ovaries. To further examine the role of gene A, we next generated an over-expressing (OE) mouse line. We found that primordial follicles were abnormally enlarged in the OE ovaries. These results suggest that protein A is required for the survival and growth of primordial follicles. On the other hand, disruption of gene B results in the abnormal oocyte enlargement, suggesting that protein B is required for the maintenance of primordial follicles.

Academic Significance and Societal Importance of the Research Achievements

本研究はマウスをモデルに哺乳動物の継続的な卵子産生メカニズムの解明を目指すものである。哺乳動物の卵巣は長期に渡る生殖を可能にするため、原始卵胞と呼ばれる最も未成熟な卵胞を限りある卵子の供給源として維持している。そして原始卵胞の卵胞成長を逐次的に開始することで継続的に卵子を作り出している。このメカニズムの破綻は早発卵巣不全などの女性不妊症の原因となることから、生殖医学的にも重要な研究課題である。本研究ではRNA結合タンパク質が介する遺伝子発現制御に注目し、原始卵胞の維持と成長を制御する分子機構の理解に迫った。本研究の成果により、原始卵胞の維持と成長開始に関わる二つのRNA制御因子が同定された。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (9 results)

All 2023 2022 2021 2020 Other

All Journal Article (5 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (2 results) (of which Invited: 2 results) Remarks (2 results)

  • [Journal Article] Antagonism between DDX6 and PI3K-AKT signaling is an oocyte-intrinsic mechanism controlling primordial follicle growth2023

    • Author(s)
      Kato Yuzuru、Saga Yumiko
    • Journal Title

      Biology of Reproduction

      Volume: 2023 Apr 17;ioad043 Issue: 1 Pages: 73-82

    • DOI

      10.1093/biolre/ioad043

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] STRA8-RB interaction is required for timely entry of meiosis in mouse female germ cells2023

    • Author(s)
      Shimada Ryuki、Kato Yuzuru、Takeda Naoki、Fujimura Sayoko、Yasunaga Kei-ichiro、Usuki Shingo、Niwa Hitoshi、Araki Kimi、Ishiguro Kei-ichiro
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 6443-6443

    • DOI

      10.1038/s41467-023-42259-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The polyol pathway is an evolutionarily conserved system for sensing glucose uptake.2022

    • Author(s)
      *Sano, H., Nakamura, A., Yamane, M., Niwa, H., Nishimura, T., Takemoto, K., Ishiguro, K., Aoki, H., Kato, Y., and Kojima, M.
    • Journal Title

      PLOS Biology

      Volume: 20 Issue: 6 Pages: 1-25

    • DOI

      10.1371/journal.pbio.3001678

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] NANOS2 suppresses the cell cycle by repressing mTORC1 activators in embryonic male germ cells2021

    • Author(s)
      Ryuki Shimada, Hiroko Koike, Takamasa Hirano, Yuzuru Kato, Yumiko Saga
    • Journal Title

      iScience

      Volume: 24 Issue: 8 Pages: 102890-102890

    • DOI

      10.1016/j.isci.2021.102890

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Decoding the transcriptome of pre-granulosa cells during the formation of primordial follicles in the mouse2021

    • Author(s)
      Fukuda Kurumi, Muraoka Masafumi, Kato Yuzuru, Saga Yumiko
    • Journal Title

      Biology of Reproduction

      Volume: -

    • Related Report
      2020 Annual Research Report
  • [Presentation] 原始卵胞の維持と活性化の制御機構:RNAヘリカーぜDDX6が関わる原始卵胞の維持機構を中心に2021

    • Author(s)
      加藤譲
    • Organizer
      熊本大学発生医学研究所第398回発生研セミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] P-body様細胞質顆粒の解析から迫る原始卵胞の維持と活性化の制御機構2020

    • Author(s)
      加藤譲
    • Organizer
      新学術領域「配偶子構築」「全能性プログラム」合同公開シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Remarks] 原始卵胞形成過程における顆粒膜細胞の遺伝子発現を解析

    • URL

      https://www.nig.ac.jp/nig/ja/2021/05/research-highlights_ja/rh20210413.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] 国立遺伝学研究所の加藤助教らのグループは原始卵胞形成過程の顆粒膜細胞のトランスクリプトーム解析を

    • URL

      https://www.gamete-integrity.com

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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