唤醒的神经基质探测了对白蛋白神经元的光遗传控制

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Antoine R Adamantidis¹, Feng Zhang, Alexander M Aravanis

¹Department of Psychiatry and Behavioral Sciences, Stanford University, 701B Welch Road, Palo Alto, California 94304, USA.

Nature

|October 19, 2007

概括

来自白蛋白 (Hcrt) 神经元的电活动直接驱动着清醒. 对于小鼠的Hcrt神经元的光遗传刺激会迅速从睡眠中唤醒它们,从而在Hcrt神经元活动和兴奋之间建立起因果关系.

科学领域:

神经科学是一个神经科学.
睡眠研究睡眠研究
神经生理学神经生理学

背景情况:

睡眠-清醒周期涉及睡眠促进和唤醒系统之间的复杂相互作用.
催化素 (Hcrt,也称为素) 神经元对于兴奋的稳定性至关重要,其功能障碍与麻醉症有关.

研究的目的:

为了确定HCrt神经元的电活动是否足以引起从睡眠中唤醒.
建立Hcrt神经元活动和睡眠状态过渡之间的因果关系.

主要方法:

在自由移动的小鼠中利用体内光遗传光刺激.
基因向的通道rhodopsin-2 在横向下丘脑中的Hcrt神经元.
通过光纤传递光线,在不同的睡眠状态中选择性地激活Hcrt神经元.

主要成果:

对HCrt神经元的直接光遗传刺激增加了从慢波睡眠和REM睡眠过渡到清醒的概率.
频率依赖光刺激: 5-30 Hz 轻脉冲列车减少了对清醒的延迟,而 1 Hz 列车没有.
建立了基因定义的Hcrt神经元活动和清醒之间的因果关系.

结论:

Hcrt神经元活动足以驱动从睡眠中唤醒.
激活Hcrt神经元的频率调节了它对睡眠-清醒过渡的影响.
这项研究为唤醒和麻醉症的神经机制提供了关键的见解.

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