食模式同步了胆脉中的昼夜时钟 - 洞察一个复杂的机制
Tereza Dočkal1,2, Pavel Houdek1, Kateryna Semenovykh1,3
1Laboratory of Biological Rhythms, Institute of Physiology of the Czech Academy of Sciences, Videnska 1083, 14200, Prague, Czech Republic.
Cellular and molecular life sciences : CMLS
|June 23, 2025
概括
状交 (ChP) 的昼夜时钟与食时间同步. 这项研究揭示了像葡萄糖这样的养信号如何重置ChP时钟,影响脑脊液动态和细胞分泌.
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
- 生理学 生理学 生理学
背景情况:
- 胸膜 (ChP) 中的昼夜时钟调节了重要的生理功能.
- 同步ChP昼夜时钟的信号,特别是在第四心室 (4V) 和侧心室 (LV) 中,仍然不太了解.
研究的目的:
- 调查是否餐时间信息同步了4V和LV的ChP昼夜时钟.
- 探索由料信号影响ChP时钟及其功能的机制.
主要方法:
- 使用的mPer2Luc小鼠接受了为期10天的反向限制养 (rRF) 协议.
- 监测PER2驱动的生物发光节奏在ChP中的Ex vivo和钟表基因表达体内.
- 在体外评估胰岛素,葡萄糖和温度对ChP时钟的影响,包括OSMI-1的实验.
主要成果:
- 一个为期10天的rRF协议在4V和LV两个阶段中提升了CHP时钟,而其他大脑区域的时钟没有受到影响.
- 4V ChP对rRF的反应比LV ChP更强,改变了与脑脊液排水和分泌能力相关的基因表达.
- 在体外,胰岛素,葡萄糖和温度单独改变了ChP时钟,模仿了rRF效应. 葡萄糖的作用部分是由O-链接的N-乙糖胺转化后修饰的介导.
结论:
- 吃饭的时间作为关键的同步信号为状交叉体昼夜时钟.
- 食诱导的代谢信号 (胰岛素,葡萄糖) 和温度在重置CHP时钟中起着关键作用.
- 这些发现阐明了一种机制,即通过ChP时钟向大脑传达养状态,从而影响其生理输出.
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