夜间摄入咖啡因会增加运动冲动性.
Erick Benjamin Saldes1, Paul Rafael Sabandal1, Kyung-An Han1
1Department of Biological Sciences, The University of Texas at El Paso, El Paso, TX 79968, USA.
iScience
|August 14, 2025
概括
夜间摄入咖啡因会损害抑制控制,并导致果的冲动行为,特别是雌性果. 这种效应与多巴胺信号传递有关,并且仅在夜间发生,而不是白天.
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
- 药理学 药理学是指药理学的学科.
背景情况:
- 咖啡因被轮班工人和军事人员广泛使用,以提高警觉.
- 夜间咖啡因消费的不良影响尚不清楚.
研究的目的:
- 为了研究夜间咖啡因摄入对行为的影响.
- 阐明潜在的神经机制,专注于多巴胺和昼夜节律.
主要方法:
- 使用 *Drosophila melanogaster* (果) 作为一个模型生物.
- 在夜间服用咖啡因后评估抑制控制和运动行为.
- 研究了多巴胺信号传递,特定多巴胺能神经元 (PAM) 和多巴胺受体 (dDA1/Dop1R1) 的作用.
- 研究了昼夜调节和睡眠剥夺的影响.
主要成果:
- 夜间咖啡因摄入会损害抑制控制,并诱导果的冲动运动行为.
- 女性对咖啡因的影响比男性更敏感.
- 观察到的效应与多动或睡眠丧失无关.
- 白天摄入咖啡因并没有损害抑制控制,这表明昼夜门.
- 多巴胺信号传递,特别是通过体叶片 (特别是γ-叶片) 中的dDA1/Dop1R1受体,对于调解这些效应至关重要.
- 对多巴胺合成,PAM神经元活动和多巴胺转运器的操纵改变了冲动性.
结论:
- 夜间咖啡因消费会导致行为冲动.
- 这种效应是由一个依赖于昼夜和多巴胺的机制介导的,涉及到特定的神经回路.
- 突出了昼夜计时在咖啡因神经行为影响中的重要性.
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