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Analysis of male and female genomes in one-cell stage mouse zygotes using the method of producing male-female haploid fusion embryos

Research Project

Project/Area Number 19K16040
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionUniversity of Yamanashi

Principal Investigator

Nagataomo Hiroaki  山梨大学, 大学院総合研究部, 講師 (30746813)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords胚性ゲノム活性化 / 雌性前核 / 雄性前核 / 細胞融合 / 雌雄前核 / ゲノム編集 / 顕微授精 / 雄核発生胚 / 雌核発生胚 / 初期胚 / 胚操作
Outline of Research at the Start

個体発生の起点となる1細胞期に起きる現象は他の細胞に類を見ない特異な現象であるため、不明な点も多い。1細胞期は雌雄ゲノムがそれぞれ前核として別々に存在しており異なる遺伝子発現をしていると考えられるが、1つの細胞内に存在するため、各前核の遺伝子発現を特異的に制御しその後の発生を調査する方法がこれまでなかった。そこで本研究では1細胞期の雌雄ゲノムを半数体の状態で別々に作製し、2細胞期に融合することで1つの2倍体胚とする雌雄半数体融合胚生産方法を検討し、1細胞期に別々の転写制御処理を可能とし、1細胞期における雌雄ゲノムの機能差を調査することを目的とする。

Outline of Final Research Achievements

Mammalian early embryos undergo dynamic changes in the one-cell stage after fertilization to acquire totipotency. The phenomena that occur at the one-cell stage, which mark the beginning of individual development, are unique and not observed in other cell types, leaving many aspects unclear. In this study, we aimed to analyze the functional differences between male and female genomes at the one-cell stage by separately producing male and female haploid genomes and fusing them at the two-cell stage to create a single diploid embryo. This approach allows separate transcriptional control in the one-cell stage. Our results revealed that while development to the blastocyst stage proceeded even when gene expression in the female pronucleus was suppressed, development halted when gene expression in the male pronucleus was suppressed. This finding elucidates the functional differences between male and female genomes.

Academic Significance and Societal Importance of the Research Achievements

胚性ゲノム活性化は胚発生過程における最初の起点となる遺伝子発現であり、非常に興味深く重要な現象だが、その特異な遺伝子発現機構を解析する手法は難しく、生物学的な重要性を示す知見は間接的あるいは断片的にしか得られていない。1細胞期では雌雄ゲノムは別々に雌性前核、雄性前核として存在しており遺伝子発現も異なると考えられているが、雌雄ゲノムの機能差を直接的に比較し、その後の発生への影響を調査する方法がこれまで存在しなかった。本研究では雌雄ゲノムの機能差を示しており、1細胞期に起きている現象を理解することは効率的な体細胞クローンの作製やより安全かつ効率的なiPS細胞作製等にも役立つと考えられる。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021 2020

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (1 results)

  • [Journal Article] Removal of sperm tail using trypsin and pre-activation of oocyte facilitates intracytoplasmic sperm injection in mice and rats2023

    • Author(s)
      TORIKAI Kohei、SHIMIZU Kazuma、NAGATOMO Hiroaki、KASAI Mariko、KATO-ITOH Megumi、KAMADA Yuko、SHIBASAKI Ikue、JEON Hyojung、KIKUCHI Riko、WAKAYAMA Sayaka、SUCHY Fabian、NAKAUCHI Hiromitsu、WAKAYAMA Teruhiko、MIZUTANI Eiji
    • Journal Title

      Journal of Reproduction and Development

      Volume: 69 Issue: 1 Pages: 48-52

    • DOI

      10.1262/jrd.2022-065

    • ISSN
      0916-8818, 1348-4400
    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ubap1 knock-in mice reproduced the phenotype of SPG802022

    • Author(s)
      Shimozono K, Nan H, Takiyama Y, et al.
    • Journal Title

      Journal of Human Genetics

      Volume: 67 Issue: 12 Pages: 679-686

    • DOI

      10.1038/s10038-022-01073-6

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evaluating the long-term effect of space radiation on the reproductive normality of mammalian sperm preserved on the International Space Station2021

    • Author(s)
      Wakayama S et al.第2著者に該当
    • Journal Title

      Science Advances

      Volume: 7 Issue: 24

    • DOI

      10.1126/sciadv.abg5554

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Adenosine A2B receptor down‐regulates metabotropic glutamate receptor 5 in astrocytes during postnatal development2021

    • Author(s)
      Tanaka Masayoshi、Shigetomi Eiji、Parajuli Bijay、Nagatomo Hiroaki、Shinozaki Youichi、Hirayama Yuri、Saito Kozo、Kubota Yuto、Danjo Yosuke、Lee Ji Hwan、Kim Sun Kwang、Nabekura Junichi、Koizumi Schuichi
    • Journal Title

      Glia

      Volume: 69 Issue: 11 Pages: 2546-2558

    • DOI

      10.1002/glia.24006

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A histone H3.3K36M mutation in mice causes an imbalance of histone modifications and defects in chondrocyte differentiation2020

    • Author(s)
      Abe Shusaku、Nagatomo Hiroaki、Sasaki Hiroyuki、Ishiuchi Takashi
    • Journal Title

      Epigenetics

      Volume: Online ahead of print Issue: 10 Pages: 1-12

    • DOI

      10.1080/15592294.2020.1841873

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Discovery of a Vertebrate-Specific Factor that Processes Flagellar Glycolytic Enolase during Motile Ciliogenesis2020

    • Author(s)
      Narita Keishi、Nagatomo Hiroaki、Kozuka-Hata Hiroko、Oyama Masaaki、Takeda Sen
    • Journal Title

      iScience

      Volume: 23 Issue: 4 Pages: 100992-100992

    • DOI

      10.1016/j.isci.2020.100992

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Development of vaginal image-based murine estrus detection system by deep le arning2020

    • Author(s)
      標智仁・兼平雅彦・神沼修・長友啓明
    • Organizer
      日本実験動物学科
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2025-01-30  

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