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Dynamics in sperm physiology during capacitaion

Research Project

Project/Area Number 17K15558
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field General physiology
Research InstitutionOsaka University

Principal Investigator

Kawai Takafumi  大阪大学, 医学系研究科, 助教 (70614915)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords精子 / 受精能獲得 / 生理学
Outline of Final Research Achievements

Mammalian sperm undergo a physiological process, called capacitation during fertilization. During capatication, calcium influx, hyperpolarization, alkalinization occur in the sperm. However the relationship among them is not well understood. Here we established experimetal system to examine this.
We succeeded in detecting pH change during capactation and also succeeced to detect alkalinization induced hyperpolarization by performing patch clamp from sperm. With these techniques we found some important knowledge of physiological change in mouse sperm during capacitation.

Academic Significance and Societal Importance of the Research Achievements

本研究によりこれまで明らかにされてこなかった哺乳類の精子が受精時に示している生理動態について、より詳細な知見を得ることが出来ると期待される。これにより、将来的には不妊治療などにも適用できることが期待される。

Report

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

    (12 results)

All 2019 2018 2017

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (6 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results) Book (1 results)

  • [Journal Article] Voltage-Sensing Phosphatases: Biophysics, Physiology, and Molecular Engineering2018

    • Author(s)
      Okamura Yasushi、Kawanabe Akira、Kawai Takafumi
    • Journal Title

      Physiological Reviews

      Volume: 98 Issue: 4 Pages: 2097-2131

    • DOI

      10.1152/physrev.00056.2017

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Voltage-Sensing Phosphatases: Biophysics, Physiology and Engineering2018

    • Author(s)
      Yasushi Okamura、Akira Kawanabe、Takafumi Kawai
    • Journal Title

      Physiological review

      Volume: 印刷中

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mechanistic insight into the suppression of microglial ROS production by voltage-gated proton channels (VSOP/Hv1)2017

    • Author(s)
      Kawai Takafumi、Tatsumi Shoki、Kihara Shinji、Sakimura Kenji、Okamura Yasushi
    • Journal Title

      Channels (Austin)

      Volume: 12 Issue: 1 Pages: 1-8

    • DOI

      10.1080/19336950.2017.1385684

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Molecular and functional characterization of the voltage-gated proton channel in zebrafish neutrophils2017

    • Author(s)
      Ratanayotha Adisorn、Kawai Takafumi、Higashijima Shin-ichi、Okamura Yasushi
    • Journal Title

      Physiological Reports

      Volume: 5 Issue: 15

    • DOI

      10.14814/phy2.13345

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Unconventional role of voltage-gated proton channels (VSOP/Hv1) in regulation of microglial ROS production2017

    • Author(s)
      Kawai Takafumi、Okochi Yoshifumi、Ozaki Tomohiko、Imura Yoshio、Koizumi Schuichi、Yamazaki Maya、Abe Manabu、Sakimura Kenji、Yamashita Toshihide、Okamura Yasushi
    • Journal Title

      Journal of Neurochemistry

      Volume: 142 Issue: 5 Pages: 686-699

    • DOI

      10.1111/jnc.14106

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Functional analysis of voltage-sensing phosphatase in mouse sperm2019

    • Author(s)
      Takafumi Kawai, Haruhiko Miyata, Hiroki Nakanishi, Souhei Sakata, Yoshifumi Okochi, Masahiko Watanabe, Kenji Sakimura, Takehiko Sasaki, Masahito Ikawa, Yasushi Okamura
    • Organizer
      9th Federation of Asia and Oceania Perinatal Societies Congress
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Zn2+ sensitivity of Hv1 channel: an evolutionary perspective2019

    • Author(s)
      Adisorn Ratanayotha, Takafumi Kawai, Yasushi Okamura
    • Organizer
      9th Federation of Asia and Oceania Perinatal Societies Congress
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Age-dependent regulatory function of microglial voltage-gated proton channels2018

    • Author(s)
      Takafumi Kawai, Keizo Takao, Kenji Sakimura, Tsuyoshi Miyakawa, Yasushi Okamura
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Sea squirt voltage-gated sodium channel : kinship with the origin of vertebrate neural sodium channels2018

    • Author(s)
      Natsuki Eguchi, Masaki Hashimoto, Yuka Jinno, Akira Kawanabe, Takafumi Kawai, Yasushi Okamura
    • Organizer
      第41回日本神経科学大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 精子における電位依存性ホスファターゼによるイノシトールリン脂質の制御2018

    • Author(s)
      河合 喬文、宮田 治彦、中西 広樹、坂田 宗平、大河内 善史、渡辺 雅彦、﨑村 建司、佐々木 雄彦、伊川 正人、岡村 康司
    • Organizer
      第123回日本解剖学会総会全国学術集会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] ミクログリアに発現する電位依存性プロトンチャネルの脳内における発現差異とその機能2017

    • Author(s)
      河合 喬文、高雄 啓三、崎村 健司、宮川 剛 、岡村 康司
    • Organizer
      第40回日本神経科学大会
    • Related Report
      2017 Research-status Report
  • [Book] 生体の科学2017

    • Author(s)
      河合喬文、筒井秀和、岡村康司
    • Total Pages
      506
    • Publisher
      医学書院
    • Related Report
      2017 Research-status Report

URL: 

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

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