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一个光激活的神经元GPCR的状局部化塑造了行为

Amy M Winans¹, Drew Friedmann¹, Cherise Stanley¹

¹Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720.

Proceedings of the National Academy of Sciences of the United States of America

|October 16, 2023

概括

神经元中的初级毛细胞充当信号中心. 在斑马鱼脊髓神经元中激活脊椎动物古老的长素A (VALopA) 通过光延长和放大引擎反应,表明增强的G蛋白结合受体信号传递.

科学领域:

神经科学是一个神经科学.
细胞生物学细胞生物学
分子生物学分子生物学

背景情况:

初级毛是中枢神经系统神经元中的关键信号器官.
在初级乳毛中G蛋白结合受体 (GPCR) 信号传递对电路功能和行为的作用在很大程度上是未知的.
像VALopA一样,外上素是可以被光激活的GPCRs.

研究的目的:

为了研究斑马鱼脊髓神经元的初级乳毛中脊椎动物古老长A (VALopA) 的功能.
确定GPCRs的状局部如何影响神经元信号和行为.
阐明VALopA影响运动的机制.

主要方法:

利用斑马鱼作为研究神经元电路和行为的模型生物.
研究了VALopA和VALopB在脊髓神经元的初级眼中的局部化.
使用光激活来研究VALopA和VALopB的功能.
进行了重定位实验,以评估状局部化对信号传输的影响.

主要成果:

脊椎动物古老的长素A (VALopA),一种G_i结合的GPCR,准斑马鱼脊髓神经元中的初级毛.
发动机电路中VALopA的光激活抑制了卷轴,这是最早的发动机形式.
将VALopA和VALopB重定位到眼延长和放大了机动反应,表明GPCR信号增强.
相关的素VALopB也与G_i结合,但不准毛,表现出更快的卷轴抑制动力学.

结论:

像VALopA这样的GPCRs的状局部化增强了中央神经元中的信号传递.
主要毛作为扩大神经调节GPCR信号的专门区.
这项研究提供了对神经元电路调节和行为的初级毛的功能意义的见解.

关键词:

这就是VALOPA.中央模式发生器片 (cilium cilium) 是一种类型的细胞.这就是Opsin的选择.斑马鱼是一种斑马鱼.

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