PACAP/PAC 1通过ipRGC-VLPO通路调节光诱导的睡眠
Weipeng Wang1, Yuan Zhang1, Lin Li1
1Department of Physiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, China.
Biochemical and biophysical research communications
|February 17, 2026
概括
pituitary adenylate cyclase-activating peptide (PACAP) 通过对腹侧前视区域 (VLPO) 的作用来促进睡眠. 通过对腹侧前视区域 (VLPO) 的作用来促进睡眠. 这种可以通过调节VLPO通路内的神经元活动来增强光诱导睡眠,特别是REM睡眠.
科学领域:
- 神经科学是一个神经科学.
- 睡眠研究 睡眠研究
- 循环节律是指循环节律的节奏.
背景情况:
- 光照会通过内在光敏的视网膜质细胞 (ipRGCs) 和腹侧前视区域 (VLPO) 途径影响睡眠.
- pituitary adenylate cyclase-activating peptide (PACAP) 是由ipRGCs释放的,并且与昼夜节律和睡眠调节有关.
- 通过ipRGC-VLPO通路在光诱导睡眠中PACAP的特定作用仍未得到充分研究.
研究的目的:
- 调查PACAP在ipRGC-VLPO通路内影响光诱导睡眠的机制.
- 确定PACAP对VLPO中神经元活动的影响.
- 为了评估PACAP在ipRGC损伤后的光诱导睡眠中的作用.
主要方法:
- 在体内脑电图 (EEG) 记录以监测睡眠模式.
- 免疫组织化学定位PACAP及其受体 (PAC1) 在VLPO中的表达.
- 在体外电生理学记录 (大脑切片补丁) 以评估神经元刺激性.
- 进行微透析,将PACAP 1-38注入VLPO.
- 眼内素 (SAP) 注射以部分破坏ipRGCs.
主要成果:
- PACAP和PAC1受体在VLPO中得到广泛的表达.
- 在VLPO中直接注射PACAP 1-38可增加整体睡眠,包括REM睡眠,并减少小鼠的清醒.
- PACAP 1-38增强了VLPO内部神经元的兴奋性,同时抑制了促进睡眠的神经元.
- 即使在部分ipRGC破坏后,PACAP 1-38在VLPO中使用也可以促进光诱导睡眠,显著增加REM睡眠.
结论:
- 在ipRGC-VLPO介导的光诱导睡眠途径中,PACAP发挥着重要作用.
- PACAP调节VLPO神经活动以促进睡眠,特别是REM睡眠.
- 这些发现阐明了一种新的睡眠调节机制,涉及PACAP和光.
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