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Characterization of novel oocyte activation mechanism which induce mammalian embryonic development

Research Project

Project/Area Number 17K15126
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Developmental biology
Research InstitutionGunma University (2018)
Osaka University (2017)

Principal Investigator

Satouh Yuhkoh  群馬大学, 生体調節研究所, 准教授 (40545571)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsライブイメージング / 受精 / 初期発生 / 卵子活性化 / カルシウム / イメージング / 卵活性化 / PLCz1 / 発生・分化 / 発生工学
Outline of Final Research Achievements

In this study, we characterized the physiological activity and the significance of sperm PLCz1-independent mouse egg activation. As a result of low-invasive live-imaging of egg calcium concentration, although it does not occur in intracytoplasmic sperm injection, it occurs under in-vitro fertilization condition, but the onsets of the calcium concentration were delayed, and the frequency of the changes were significantly reduced compared to those of PLCz1-dependent activation. On the other hand, the number of fused spermatozoa has an additive relationship to the oscillation frequencies. In addition, injection of fragmented cells and the analysis of double gene knockout mice for known candidates for the activation factors and the PLCz1, we obtained results suggesting that this weak activating ability is observed only through the cell fusion process.

Academic Significance and Societal Importance of the Research Achievements

現在わが国では少子化や高齢出産化という課題に面しているが、哺乳類の受精は未だ不明なことが多い。本研究では、申請者らが発見した、卵子を活性化するはずの精子PLCz1蛋白質がないときのみに見られる弱い活性化能について解析した。結果、この弱い活性化は、顕微授精のような人為的な授精法で回避される、精子と卵子の細胞融合過程を経るときのみ観察され、低い頻度ではあるが子を成せることがわかった。また、たくさんの精子の融合で活性化能が強くなった。これは、臨床研究で示唆された活性化不全患者における他精子受精ともよく一致し、多くの精子が卵に融合するより原始的な受精様式とも共通することから、進化的な関連も示唆された。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (15 results)

All 2018 2017 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Book (1 results) Remarks (2 results)

  • [Journal Article] New Insights into the Molecular Events of Mammalian Fertilization2018

    • Author(s)
      Satouh Yuhkoh、Ikawa Masahito
    • Journal Title

      Trends in Biochemical Sciences

      Volume: 43 Issue: 10 Pages: 818-828

    • DOI

      10.1016/j.tibs.2018.08.006

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Sperm-borne phospholipase C zeta-1 ensures monospermic fertilization in mice2018

    • Author(s)
      Nozawa Kaori、Satouh Yuhkoh、Fujimoto Takao、Oji Asami、Ikawa Masahito
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 1315-1315

    • DOI

      10.1038/s41598-018-19497-6

    • NAID

      120006957442

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Sperm-borne phospholipase C zeta-1 ensures monospermic fertilization in mice2018

    • Author(s)
      Yuhkoh Satouh, Kaori Nozawa, Masahito Ikawa
    • Organizer
      XIIIth International Symposium on Spermatology
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マウス精子PLCZ1は単精子受精を担保するための卵子活性化因子である2018

    • Author(s)
      佐藤裕公、野澤香織、伊川正人
    • Organizer
      第65回日本実験動物学会総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] マウスの受精におけるPLCz1非依存的な卵子活性化2018

    • Author(s)
      佐藤裕公、野澤香織、伊川正人
    • Organizer
      第59回日本卵子学会学術集会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 哺乳類卵子はPLCz1非依存的で生理的な経路によっても活性化されうる2018

    • Author(s)
      佐藤裕公、野澤香織、伊川正人
    • Organizer
      第36回日本受精着床学会総会・学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Sperm-borne phospholipase C zeta-1 ensures monospermic fertilization in mice2018

    • Author(s)
      Yuhkoh Satouh, Kaori Nozawa, Masahito Ikawa
    • Organizer
      The 13th International Symposium of the Institute Network for Biomedical Sciences
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Sperm-borne phospholipase C zeta-1 ensures monospermic fertilization in mice2018

    • Author(s)
      Yuhkoh Satouh, Kaori Nozawa, Masahito Ikawa
    • Organizer
      The 4th IMCR Symposium on Endocrine and Metabolism
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マウス卵の活性化とライブイメージング2018

    • Author(s)
      佐藤裕公
    • Organizer
      第6回生殖若手の会@下田市
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Low-invasive Imaging of Ca2+ Oscillations and Quantitative Analysis of the Cortical Reaction in Mammalian Eggs2017

    • Author(s)
      Yuhkoh Satouh, Kaori Nozawa, Kazuo Yamagata, Masahito Ikawa
    • Organizer
      50th Annual Meeting of the Society for the Study of Reproduction
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Low-invasive Imaging of Ca2+ Oscillations and Quantitative Analysis of the Cortical Reaction in Mammalian Eggs2017

    • Author(s)
      Yuhkoh Satouh
    • Organizer
      大阪大学医学系研究科若手研究フォーラム
    • Related Report
      2017 Research-status Report
  • [Presentation] ゲノム編集を用いた哺乳類生殖因子の包括的解析2017

    • Author(s)
      佐藤裕公
    • Organizer
      第39回 関西生殖発生毒性フォーラム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Book] 実践 臨床生殖免疫学2018

    • Author(s)
      柴原浩章 編、著者計153名(うち9番目)
    • Total Pages
      730
    • Publisher
      中外医学社
    • ISBN
      9784498060883
    • Related Report
      2018 Annual Research Report
  • [Remarks] Yuhkoh Satouh HP

    • URL

      https://sites.google.com/view/yuhkohsatouh/home

    • Related Report
      2018 Annual Research Report
  • [Remarks] Satouh Yuhkoh's HP

    • URL

      https://sites.google.com/site/satouhyuhkoh/

    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2020-03-30  

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