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EFFECT OF MATERNAL DIET AND NUTRITIONAL STATUS ON MAMMALIAN SEX DETERMINATION

Research Project

Project/Area Number 19K16490
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 48020:Physiology-related
Research InstitutionGifu University (2020)
Osaka University (2019)

Principal Investigator

Miyawaki Shingo  岐阜大学, 応用生物科学部, 助教 (70756759)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
KeywordsSry / 性決定 / ゲノム編集 / マウス / Cryptic exon / エピゲノム / 代謝 / 生殖腺体細胞
Outline of Research at the Start

本申請研究では、申請者の見出した生殖腺で高発現する17個の代謝関連遺伝子を機能欠失したマウスを作製して、オス型の染色体を持つ個体がメスに性転換をするか評価する。さらに、胎仔の生殖腺における代謝と性決定の関係をエピゲノム動態の観点から明らかにする。

Outline of Final Research Achievements

The mammalian sex-determining gene Sry induces male development. Since its discovery 30 years ago, Sry has been believed to be a single-exon gene. Here, we identified a cryptic second exon of mouse Sry and a corresponding novel transcript, two-exon Sry (Sry-T). XY mice lacking Sry-T were sex-reversed, and ectopic expression of Sry-T in XX mice induced male development. Sry-T mRNA is expressed similarly to that of canonical, single-exon Sry (Sry-S), but SRY-T protein is expressed predominantly, due to the absence of a degron which we identified in the C-terminus of SRY-S. Sry exon2 appears to have evolved recently in mice, through acquisition of retrotransposon-derived coding sequence to replace the degron. Our findings suggest that in nature, SRY-T, not SRY-S, is the bona fide testis-determining factor.

Academic Significance and Societal Importance of the Research Achievements

本研究では、マウスの性決定遺伝子Sryにはこれまで知られていなかった“隠れエキソン”が存在し、そのエキソンは真の性決定因子であるSRY-Tをコードしていることを世界で初めて明らかにした。生物学の大きなテーマのひとつである性決定において、鍵となる重要な遺伝子Sryの全体像が解明されたことになる。この発見はほ乳類の性決定の仕組みの解明と、性決定遺伝子の進化の理解につながると期待される。

Report

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

    (9 results)

All 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] The University of Queensland(オーストラリア)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] マウスの性決定遺伝子Sryにおける「隠れエキソン」と,それがコードする真の性決定因子SRY-Tの発見2021

    • Author(s)
      宮脇慎吾、立花誠
    • Journal Title

      実験医学

      Volume: 39(4) Pages: 571-574

    • Related Report
      2020 Annual Research Report
  • [Journal Article] The mouse Sry locus harbors a cryptic exon that is essential for male sex determination2020

    • Author(s)
      Miyawaki Shingo、Kuroki Shunsuke、Maeda Ryo、Okashita Naoki、Koopman Peter、Tachibana Makoto
    • Journal Title

      Science

      Volume: 370 Issue: 6512 Pages: 121-124

    • DOI

      10.1126/science.abb6430

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Characterization of brown adipose tissue thermogenesis in the naked mole-rat (Heterocephalus glaber), a heterothermic mammal2020

    • Author(s)
      Oiwa Yuki、Oka Kaori、Yasui Hironobu、Higashikawa Kei、Bono Hidemasa、Kawamura Yoshimi、Miyawaki Shingo、Watarai Akiyuki、Kikusui Takefumi、Shimizu Atsushi、Okano Hideyuki、Kuge Yuji、Kimura Kazuhiro、Okamatsu-Ogura Yuko、Miura Kyoko
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 19488-19499

    • DOI

      10.1038/s41598-020-74929-6

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 遺伝子改変マウスの作製の歴史と技術進歩2019

    • Author(s)
      宮脇慎吾、立花誠
    • Journal Title

      生産と技術

      Volume: Vol. 71 (4) Pages: 15-20

    • NAID

      40022051021

    • Related Report
      2019 Research-status Report
  • [Presentation] マウスSryにおける"隠れエキソン”の発見2021

    • Author(s)
      宮脇慎吾、立花誠
    • Organizer
      日本卵子学会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] THE EFFECT OF MATERNAL DIET AND NUTRITIONAL STATUS ON MAMMALIAN SEX DETERMINATION2019

    • Author(s)
      Miyawaki, S., Okashita, N., Kuroki, S. and Tachibana, M
    • Organizer
      International Society for Stem Cell Research Annual Meeting 2019 (Los Angeles)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] A novel sex determination region in inverted repeat sequence of mouse Y chromosome.2019

    • Author(s)
      Miyawaki, S
    • Organizer
      日本分子生物学会年会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Remarks] 大阪大学大学院生命機能研究科 マウス性決定遺伝子Sryの全貌をついに解明

    • URL

      https://www.fbs.osaka-u.ac.jp/ja/research_results/papers/detail/1003

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

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