睡眠需要的分子基质的定量蛋白分析
Zhiqiang Wang1, Jing Ma1, Chika Miyoshi1
1International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, Japan.
Nature
|June 15, 2018
概括
睡眠需要由大脑蛋白质酸化来调节. 这项研究确定了特定的蛋白 (SNIPPs),其酸化水平跟踪睡眠需求,揭示了睡眠稳态的分子特征.
科学领域:
- 神经科学
- 分子生物学
- 睡眠科学
背景情况:
- 睡眠和清醒极大地影响大脑功能, 包括分子变化,神经元活动和突触可塑性.
- 睡眠与清醒的平衡依赖于在清醒期间建立并在睡眠期间消失的睡眠需求.
研究的目的:
- 调查睡眠需要的分子基础.
- 确定与睡眠需求的积累和消散相关的分子标记.
主要方法:
- 在睡眠不足的小鼠和具有导致睡眠需求增加的基因突变的"睡眠"小鼠中使用了定量蛋白组分析.
- 对比分析确定了睡眠需求指数蛋白 (SNIPPs),并调查了SIK3基因及其突变的SLEEPY蛋白的作用.
主要成果:
- 睡眠不足和睡眠突变都导致大脑蛋白质酸化的增加.
- 鉴定了80种突触蛋白 (SNIPPs),显示与睡眠需求相关的酸化状态.
- 在非快速眼动睡眠中,抑制SIK3激酶活性降低了SNIPP酸化和慢波活性.
结论:
- SNIPP酸化是睡眠需求的分子特征,与此同时积累和消散.
- SNIPPs的化-脱化循环可能是突触和睡眠-清醒均质的关键调节机制.
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