中央时钟通过调节Drosophila的食物气味吸引力来驱动食节奏
Mingmin Zhou1, Meijun Zheng1, Xiaohang Zhang1
1Institute of Biophysics, State Key Laboratory of Cognitive Science and Mental Health, Center for Excellence in Biomacromolecules, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Current biology : CB
|September 27, 2025
概括
果表现出每天寻找食物的节奏. 一个涉及嗅觉抑制投射神经元 (mlPN3) 和多巴胺能神经元 (PAM-β) 的消抑制电路.
科学领域:
- 神经科学是一个神经科学.
- 时间生物学 时间生物学
- 动物行为 动物行为
背景情况:
- 动物在食行为中表现出昼夜节律,但神经基础尚不清楚.
- 嗅觉抑制投射神经元 (iPNs) 参与调节食.
研究的目的:
- 为了阐明Drosophila中昼夜食行为背后的神经机制.
- 为了确定控制节奏性寻找食物的特定神经元电路.
主要方法:
- 在Drosophila中神经元活动的光遗传学和遗传操纵.
- 成像用于监测神经元活动.
- 行为分析量化食模式.
主要成果:
- 确定了多索菲拉 (Drosophila) mlPN3神经元作为寻食物的关键昼夜调节器.
- 证明了PAM-β'2多巴氨基神经元 (DANs) 节奏抑制mlPN3神经元.
- 显示早晨细胞通过色素分散因子 (PDF) 神经激活PAM-β'2 DANs,释放早晨食的mlPN3抑制.
结论:
- 一个由昼夜信号驱动的消抑制电路调节了每天的食节奏.
- DANs的循环激活抑制抑制神经元,使早晨的食成为可能.
- 这项研究提供了关于消抑制在昼夜时钟功能中的作用的见解.
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