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时钟生成的时间代码确定突触可塑性以控制睡眠
Masashi Tabuchi1, Joseph D Monaco2, Grace Duan1
1Department of Neurology, Johns Hopkins University, Baltimore, MD 21205, USA.
Cell
|October 16, 2018
概括
在Drosophila时钟神经元中,时间尖峰模式控制着兴奋和睡眠,独立于发射速度. 这项研究确定了分子通路并证明了时间编码
科学领域:
- 神经科学
- 时间生物学
- 分子生物学
背景情况:
- 神经元使用速率编码 (发射频率) 和时间编码 (发射时间/模式) 来编码信息.
- 对于行为控制的时代代码及其潜在的分子机制的充分性是有争议的.
研究的目的:
- 调查不同时间尖峰模式,与发射率分开,编码时间依赖的唤醒和调节Drosophila的睡眠.
- 确定负责生成昼夜依赖时间尖峰模式的分子途径.
主要方法:
- 使用Drosophila时钟神经元来研究神经编码.
- 进行大规模的基因查以确定分子途径.
- 研究了尖峰形态和离子流变化.
主要成果:
- 不同的时间尖峰模式, 独立于发射速度, 已被证明编码时间依赖的唤醒和调节睡眠.
- 识别了调节尖峰时间的日间依赖离子流和尖峰形态变化的分子途径.
- 已经证明, 仅仅是白天的激增模式, 就能诱导下游激发神经元的塑性.
结论:
- 时间编码在行为中起着因果作用,特别是在调节兴奋和睡眠方面.
- 定义了一种新型的突触可塑性,
- 阐明了行为相关时间代码生成的分子机制.
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