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Elucidation of sperm navigation strategies in the fertilization environment and its application to in vitro fertilization

Research Project

Project/Area Number 21K12622
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionYokohama National University

Principal Investigator

Hyakutake Toru  横浜国立大学, 大学院工学研究院, 教授 (20335582)

Co-Investigator(Kenkyū-buntansha) 安井 学  地方独立行政法人神奈川県立産業技術総合研究所, 電子技術部, 主任研究員 (80426361)
Project Period (FY) 2021-04-01 – 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 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords集団遊泳 / 走流性 / 走触性 / エージェントベースモデル / 精子選別 / マイクロ流体デバイス / 体外受精 / 精子遊泳
Outline of Research at the Start

本研究では,卵管内表面トポロジーと蠕動運動による流れを模した疑似卵管モデルによるin vitro実験,および数理モデルを用いた精子群遊泳解析を通して,生体力学的観点から,受精環境下における精子ナビゲーション戦略機序の解明に迫る.得られた知見を活かして,実用的観点からは,高い成功率が得られる体外受精システムを構築する.本研究成果は,体外受精の成功率低下という喫緊の課題に直面している生殖補助分野や畜産分野に対して大きな貢献をもたらす.

Outline of Final Research Achievements

To clarify the navigation strategy of mammalian sperm in the female reproductive organs, we investigated sperm collective swimming using channels that reproduce the flow in the oviduct. We also introduced an agent-based model and constructed a new sperm swimming model that incorporates thigmotaxis and rheotaxis. Furthermore, we developed a microfluidic device that can select highly motile sperm at high concentration, and succeeded in producing high-quality embryos by in vitro fertilization using the sorted sperm.

Academic Significance and Societal Importance of the Research Achievements

これらの研究で得られた結果は,学術的意義としては,哺乳類精子が体内受精において卵子に到達するまでのナビゲーション戦略に関する新しい知見を提供できる.社会的意義としては,精子の体内受精のナビゲーション戦略を理解することで、生殖補助医療や畜産分野において,これまで低受精確率であった既存の体外受精に替わる新しい効果的な体外受精用デバイスを開発する上での重要な知見を提供できる.

Report

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

    (14 results)

All 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Sperm Motility in Rheological Fluids Mimicking Fertilization Environment2022

    • Author(s)
      百武徹
    • Journal Title

      Seibutsu Butsuri

      Volume: 62 Issue: 3 Pages: 175-177

    • DOI

      10.2142/biophys.62.175

    • ISSN
      0582-4052, 1347-4219
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Particle Behavior in Curved Microchannels: Aspect Ratio Effects2021

    • Author(s)
      Hayamizu Y、Nakamura A、Hyakutake T、Gonda T、Morita S、Ohtsuka S、Yanase S
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1909 Issue: 1 Pages: 012062-012062

    • DOI

      10.1088/1742-6596/1909/1/012062

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 非ニュートン流体中における精子の集団遊泳に関する実験的研究”2023

    • Author(s)
      佐藤駿介,百武徹
    • Organizer
      第35回バイオエンジニアリング講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Predicting sperm motion in microfluidic channels with sperm swimming model2023

    • Author(s)
      Toru Hyakutake and Daisuke Higashiyama
    • Organizer
      2023 BMES Annual Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 受精環境を模したレオロジー流体中における精子の運動特性2023

    • Author(s)
      百武徹
    • Organizer
      2023年度生物流体研究集会「生物流体力学における境界の役割」
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 精子遊泳モデルを用いたマイクロ流路内の精子運動予測2022

    • Author(s)
      東山大介,櫻井凜太郎,百武徹
    • Organizer
      第34回バイオエンジニアリング講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Development of an effective in vitro fertilization device featuring a three-dimensional structure2022

    • Author(s)
      Ren Kanai, Yunosuke Tosen, Toru Hyakutake
    • Organizer
      The 9th World Congress of Biomechanics 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Rheotaxis-based sorting of highly motile sperm using multiple microfluidics channels2022

    • Author(s)
      Yuna Seto, Joji Shiroto, Toru Hyakutake
    • Organizer
      The 9th World Congress of Biomechanics 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Predicting sperm motion in microfluidic channels with sperm swimming model2022

    • Author(s)
      Toru Hyakutake, Daisuke Higashiyama
    • Organizer
      The 9th World Congress of Biomechanics 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] マイクロチャネル内の精子の挙動(運動精子に及ぼす溝の効果)2022

    • Author(s)
      稲村 渉太, 早水 庸隆, 益田 卓哉, 濱田 竜生, 森田 慎一, 百武 徹
    • Organizer
      日本機械学会第100期流体工学部門講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 溝付きマイクロチャネル内における精子の挙動(運動精子に及ぼす溝幅の影響)2022

    • Author(s)
      稲村 渉太, 早水 庸隆, 益田 卓哉, 濱田 竜生, 森田 慎一, 百武 徹
    • Organizer
      日本機械学会中国四国支部第61期総会・講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 精子集積構造を有するマイクロ流体チップに関する研究2021

    • Author(s)
      櫻井凜太郎,金井蓮,百武徹
    • Organizer
      第33回バイオフロンティア講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Hydrodynamic Study of Bovine Sperm Motility and Application to In-vitro Fertilization2021

    • Author(s)
      Toru Hyakutake
    • Organizer
      RIMS Workshop Biofluid Mechanics of Reproduction
    • Related Report
      2021 Research-status Report
    • Invited
  • [Patent(Industrial Property Rights)] 運動性精子選別デバイス、及び運動性精子の選別方法2023

    • Inventor(s)
      三田正弘,安井学,百武徹,大日方塁,塚原隼人
    • Industrial Property Rights Holder
      三田正弘,安井学,百武徹,大日方塁,塚原隼人
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-205929
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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