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Lipid Remodeling by Membrane Potential Signaling in Sperm

Research Project

Project/Area Number 20KK0376
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))

Allocation TypeMulti-year Fund
Review Section Basic Section 48020:Physiology-related
Research InstitutionOsaka University

Principal Investigator

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

Project Period (FY) 2021 – 2023
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Keywords精子 / 膜電位 / 脂質 / TMEM16 / VSP
Outline of Research at the Start

一般に細胞の膜電位情報は「電位依存性イオンチャネル」によって感知され、それに伴うイオンの流出入によって細胞生理機能が制御される。一方で、申請者は近年精子において、膜電位依存的に酵素活性を示すVSP(Voltage sensing phosphatase)に着目し、「電気信号を感知してイノシトールリン脂質レベルを制御する」メカニズムを明らかにした。本研究ではこの概念をさらに検証・拡張し、最終的には「電気信号を感知して脂質分布を制御するメカニズム」を解明することを目的とする。

Outline of Final Research Achievements

In this study, we focused on the voltage-gated phosphatase VSP, which senses membrane potential and regulates the amount of inositol phospholipids in spermatozoa, and examined its effects on other lipid distributions. Focusing on TMEM16F, known as a type of scramblase, we tested whether this activity is regulated by inositol phospholipids by heterologously expressing VSP in HEK cells. As a result, we observed that the amount of cation current derived from TMEM16F decreased when VSP was activated by depolarizing stimuli, suggesting the existence of inositol phospholipid sensitivity of TMEM16F.

Academic Significance and Societal Importance of the Research Achievements

これまで我々は、精子において新規の電位感知機構(VSPによる電位感知機構)が存在することを明らかにし、それが成熟精子の運動制御に関わることを報告していた。この際は、VSPによる成熟精子のイオンチャネル活性の制御に焦点を置いていたが、最近の我々の研究により、VSPの活性にはむしろ「未成熟精子」の電気信号が重要であることが分かりつつある。本研究ではさらに、この「未成熟精子の電気信号」が、膜蛋白質の発現や他の脂質分布の制御にも関わりうることを明らかにしている。この様な知見は、将来的には精子を対象とした不妊治療などにおいても、重要な役割を果たすと考えられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (12 results)

All 2024 2023 2022 2021

All Int'l Joint Research (1 results) Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (3 results) (of which Invited: 2 results)

  • [Int'l Joint Research] Duke University School of Medicine(米国)2021

    • Related Report
      2023 Annual Research Report
  • [Journal Article] (R)-ketamine restores anterior insular cortex activity and cognitive deficits in social isolation-reared mice2024

    • Author(s)
      Yokoyama Rei、Ago Yukio、Igarashi Hisato、Higuchi Momoko、Tanuma Masato、Shimazaki Yuto、Kawai Takafumi、Seiriki Kaoru、Hayashida Misuzu、Yamaguchi Shun、Tanaka Hirokazu、Nakazawa Takanobu、Okamura Yasushi、Hashimoto Kenji、Kasai Atsushi、Hashimoto Hitoshi
    • Journal Title

      Molecular Psychiatry

      Volume: - Issue: 5 Pages: 1-11

    • DOI

      10.1038/s41380-024-02419-6

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Role of K364 next to the active site cysteine in voltage-dependent phosphatase activity of Ci-VSP2023

    • Author(s)
      Paixao Ian Costa、Mizutani Natsuki、Matsuda Makoto、Andriani Rizki Tsari、Kawai Takafumi、Nakagawa Atsushi、Okochi Yoshifumi、Okamura Yasushi
    • Journal Title

      Biophysical Journal

      Volume: - Issue: 11 Pages: 2267-2284

    • DOI

      10.1016/j.bpj.2023.01.022

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Glucose absorption activity and gene expression of sugar transporters in the trophotaenia of the viviparous teleost Xenotoca eiseni2023

    • Author(s)
      Iida Atsuo、Tsuda Natsuho、Yoshida Junki、Nomura Jumpei、Ratanayotha Adisorn、Kawai Takafumi、Hondo Eiichi
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - General Subjects

      Volume: 1867 Issue: 11 Pages: 130464-130464

    • DOI

      10.1016/j.bbagen.2023.130464

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Insight into the function of a unique voltage-sensor protein (TMEM266) and its short form in mouse cerebellum2022

    • Author(s)
      Kawai T、Narita H、Konno K、Akter S、Andriani RT、Iwasaki H、Nishikawa S、Yokoi N、Fukata Y、Fukata M、Wiriyasermkul P、Kongpracha P、Nagamori S、Takao K、Miyakawa T、Abe M、Sakimura K、Watanabe M、Nakagawa A、Okamura Y
    • Journal Title

      Biochemical Journal

      Volume: 479 Issue: 11 Pages: 1127-1145

    • DOI

      10.1042/bcj20220033

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Voltage-sensing phosphatase (Vsp) regulates endocytosis-dependent nutrient absorption in chordate enterocytes2022

    • Author(s)
      Ratanayotha Adisorn、Matsuda Makoto、Kimura Yukiko、Takenaga Fumiko、Mizuno Tomoaki、Hossain Md. Israil、Higashijima Shin-ichi、Kawai Takafumi、Ogasawara Michio、Okamura Yasushi
    • Journal Title

      Communications Biology

      Volume: 5 Issue: 1 Pages: 948-948

    • DOI

      10.1038/s42003-022-03916-6

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Spotlight on the Binding Affinity of Ion Channels for Phosphoinositides: From the Study of Sperm Flagellum2022

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

      Frontiers in Physiology

      Volume: 13 Pages: 1-5

    • DOI

      10.3389/fphys.2022.834180

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Heterologous functional expression of ascidian Nav1 channels and close relationship with the evolutionary ancestor of vertebrate Nav channels2021

    • Author(s)
      Kawai Takafumi、Hashimoto Masaki、Eguchi Natsuki、Nishino Junko M.、Jinno Yuka、Mori-Kreiner Risa、Aspaker Mans、Chiba Daijiro、Ohtsuka Yukio、Kawanabe Akira、Nishino Atsuo S.、Okamura Yasushi
    • Journal Title

      Journal of Biological Chemistry

      Volume: 296 Pages: 100783-100783

    • DOI

      10.1016/j.jbc.2021.100783

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Heterogeneity of microglial proton channel in different brain regions and its relationship with aging.2021

    • Author(s)
      Kawai T,Takao K,Akter S,Abe M,Sakimura K,Miyakawa T,Okamura Y
    • Journal Title

      J Neurochem.

      Volume: - Issue: 3 Pages: 624-641

    • DOI

      10.1111/jnc.15292

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Voltage-sensing Phosphatase (VSP) Activity in Mammalian Epididymal Maturating Spermatozoa2024

    • Author(s)
      河合喬文
    • Organizer
      第101回日本生理学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Function of calcium-activated ion channels in medial habenula neurons2023

    • Author(s)
      河合喬文
    • Organizer
      第46回日本神経科学大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Ion channel regulation by phosphoinositides phosphatase and its voltage-dependence in mice sperm flagellum2023

    • Author(s)
      Takafumi Kawai
    • Organizer
      日本生理学会 第100回記念大会
    • Related Report
      2022 Research-status Report
    • Invited

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Published: 2021-03-19   Modified: 2025-01-30  

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