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Neural mechanisms of sexually dimorphic behavior

Research Project

Project/Area Number 19K06911
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionSaitama Medical University

Principal Investigator

Suo Satoshi  埼玉医科大学, 医学部, 准教授 (20596845)

Co-Investigator(Kenkyū-buntansha) 坪井 貴司  東京大学, 大学院総合文化研究科, 教授 (80415231)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords行動 / 性差 / C. elegans / 精子 / 運動量 / 自発運動量 / 交尾 / ドーパミン / 神経伝達物質 / 性行動 / 受容体 / カルシウム / 自発運動 / 行動状態
Outline of Research at the Start

本研究は、神経機能の解析に有用なモデル生物C. elegansを用いて、自発運動の性差を解析することで、行動の性差を生み出すメカニズムを分子レベル、神経回路レベルで解明する。まず、伝達物質欠損変異体の解析から自発運動の性差を生み出すのに寄与する伝達物質を同定する。次に、蛍光プローブを用いたイメージング解析により神経細胞でのシグナル伝達の性差を明らかにする。さらに、遺伝子発現解析や遺伝学的スクリーニングにより神経伝達の性差に影響を及ぼす因子を同定し、その作用機序を調べることで、神経伝達に性差が生み出されるメカニズムを明らかにする。

Outline of Final Research Achievements

Sex differences in behavior are important for animals to reproduce effectively, but the mechanisms underlying these sex differences are largely unknown. In the nematode C. elegans, there are hermaphrodites that can self-fertilize and males that mate with hermaphrodites, and hermaphrodites that do not need a mate have lower locomotor activity than males. In this study, we found that hermaphrodite locomotion is suppressed by sperm and revealed a mechanism that regulates sex-specific exploration depending on whether a mate is needed to reproduce.

Academic Significance and Societal Importance of the Research Achievements

哺乳類を含め多くの生物で、交尾によってメスの体内に入った精子はしばらくの間、貯蔵される。交尾後にメスの行動に変化が見られることが、いくつかの動物種で報告されているが、これは交尾によるのか、それとも貯蔵精子によるのか、不明な点が多い。本研究では、線虫の雌雄同体を用いることで、交尾と関係なく、精子によって行動に変化が起きることを明らかにし、精子による適応的な行動制御を明らかにした。

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

    (12 results)

All 2024 2023 2022 2021 2020 2019 Other

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Journal Article] Sperm function is required for suppressing locomotor activity of C. elegans hermaphrodites2024

    • Author(s)
      Suo Satoshi
    • Journal Title

      PLOS ONE

      Volume: 19 Issue: 1 Pages: e0297802-e0297802

    • DOI

      10.1371/journal.pone.0297802

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Small molecule inhibitors of α-synuclein oligomers identified by targeting early dopamine-mediated motor impairment in C. elegans2021

    • Author(s)
      Chen KS, Menezes K, Rodgers JB, O’Hara DM, Tran N, Fujisawa K, Ishikura S, Khodaei S, Chau H, Cranston A, Kapadia M, Pawar G, Ping S, Krizus A, Lacoste A, Spangler S, Visanji NP, Marras C, Majbour NK, El-Agnaf OMA, Lozano AM, Culotti J, Suo S, Ryu WS, Kalia SK, Kalia LV
    • Journal Title

      Molecular Neurodegeneration

      Volume: 16 Issue: 1 Pages: 77-77

    • DOI

      10.1186/s13024-021-00497-6

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Internal sperm regulates locomotor behaviors of C. elegans hermaphrodites.2023

    • Author(s)
      周防諭
    • Organizer
      第46回日本神経科学大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Hermaphrodite behavior is modulated by mating2022

    • Author(s)
      周防諭
    • Organizer
      線虫研究の未来を創る会 2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 線虫C. elegans雌雄同体の行動の精子による制御の解析2022

    • Author(s)
      周防諭
    • Organizer
      第45回分子生物学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Sperm regulates behavioral states in hermaphrodites2021

    • Author(s)
      Satoshi Suo
    • Organizer
      23rd International C. elegans Meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sperm regulates locomotor behavior of hermaphrodites2021

    • Author(s)
      周防諭
    • Organizer
      線虫研究の未来を創る会
    • Related Report
      2021 Research-status Report
  • [Presentation] C. elegansでは貯蔵された精子によって雌雄同体の行動が変化する2021

    • Author(s)
      周防諭、丸山敬
    • Organizer
      日本分子生物学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] C. elegansにおいてTGFβ経路はドーパミンによる性特異的な運動量の制御に関与する2020

    • Author(s)
      周防 諭, 原田 一貴, 丸山 敬, 坪井 貴司
    • Organizer
      第43回日本神経科学大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Sexually dimorphic dopaminergic signaling regulates behavioral states of C. elegans2019

    • Author(s)
      Suo, S., Harada, K., Matsuda, S., Kyo, K., Wang, M., Maruyama, K., Awaji, T., Tsuboi, T.
    • Organizer
      International C. elegans Meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ドーパミンは線虫C. elegansの運動量の性差を生み出す.2019

    • Author(s)
      周防 諭、原田 一貴、松田 翔吾、姜興起、王 旻、丸山 敬、淡路 健雄、坪井 貴司
    • Organizer
      Neuro2019 日本神経科学会大会・日本神経化学会大会
    • Related Report
      2019 Research-status Report
  • [Remarks] 埼玉医科大学薬理学教室

    • URL

      http://www.saitama-med.ac.jp/uinfo/yakuri/index.html

    • Related Report
      2023 Annual Research Report 2022 Research-status Report 2021 Research-status Report 2020 Research-status Report 2019 Research-status Report

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

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