通过白受体神经元中的昼夜时钟来调节 hedonic 食节律
Jazmin Osorio-Mendoza1, Jana-Thabea Kiehn1, Sarah Stenger2
1Institute of Neurobiology, University of Lübeck, Lübeck, Germany; Center of Brain, Behavior & Metabolism, University of Lübeck, Lübeck, Germany.
Molecular metabolism
|July 27, 2025
概括
昼夜时钟关闭了大脑中的瘦素信号,以控制快乐的食欲并保持代谢平衡. 破坏这种时钟控制的机制会影响食节奏和体重增加.
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
- 代谢调节 代谢调节 代谢调节
背景情况:
- 昼夜系统通过中央和外围时钟同步生理过程,包括食欲调节.
- 胃口涉及恒常性 (能量需求) 和快乐性 (欲望) 途径,勒素信号发挥着关键作用.
- 昼夜节律与瘦素对食行为的控制之间的相互作用,特别是享乐方面,尚未完全理解.
研究的目的:
- 为了研究这一假设,昼夜门的中枢神经系统 (CNS) 中的瘦素信号调节整整一天的恒常和快乐的胃口.
- 阐明昼夜时钟在调节莱普丁对食行为和代谢平衡的影响中的作用.
主要方法:
- 在小鼠模型中分析食物摄入节奏:缺素 (ob/ob),时钟缺陷 (Per1/2或Bmal1淘汰),以及在中枢神经系统中破坏了素受体昼夜门的转基因小鼠 (ObRb.Bmal1).
主要成果:
- 在早期的休息阶段,瘦素缺乏的小鼠表现出快乐的食欲增加.
- 缺乏时钟的小鼠在享乐和恒常的食欲控制中表现出被破坏的节奏.
- 在瘦素敏感神经元中破坏时钟功能,降低了对美味食物的敏感性,初始体重增加,在肥胖的条件下脂肪组织的生长.
结论:
- 一个局部时钟控制的机制关闭了中枢的瘦素信号,调节了快乐的食物摄入节奏.
- 这种关门机制对于维持新陈代谢平衡和调节养行为以响应昼夜线索至关重要.
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