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2023 Fiscal Year Final Research Report

Neural mechanisms of sexually dimorphic behavior

Research Project

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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
Keywords行動 / 性差 / C. elegans / 精子 / 運動量
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.

Free Research Field

神経科学

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。

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Published: 2025-01-30  

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