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状细胞中的多巴胺D2受体调节激发性传播和海马体功能

Michelle C Gulfo¹, Joseph J Lebowitz², Czarina Ramos¹

¹Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461.

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

|December 8, 2023

概括

细胞 (MCs) 上的多巴胺D2受体 (D2Rs) 对空间记忆和预防焦虑和至关重要. 它们的有针对性的去除会损害认知功能,并增加海马中的发作易感性.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学
遗传学是一个遗传学.

背景情况:

摩西细胞 (MCs) 是牙状回形 (DG) 中的关键刺激神经元.
多巴胺D2受体 (D2R) 基因表达是MC的标志性特征,这表明多巴胺基信号在DG功能中的作用.
众所周知,D2R信号会影响认知和神经精神疾病,但其在MCS中的功能在很大程度上是未知的.

研究的目的:

调查D2Rs的功能性作用,特别是在DG内部的MC中.
阐明MC D2R信号对海马功能,行为和的影响.

主要方法:

使用条件淘汰赛小鼠在成年小鼠中选择性地从MC中删除D2R基因 (Drd2).
采用D2R knockin小鼠模型来确定D2Rs在MCs中的亚细胞局部.
进行了电生理学记录,以评估突触传输和神经元特性.

主要成果:

选择性去除MC D2Rs导致空间记忆受损,增加类似焦虑的行为和促发作效应.
发现D2Rs在DG的内部分子层中被丰富,其中MC与颗粒细胞发生突触.
通过多巴胺激活D2R减少了MC以通过前突触机制使粒细胞突触传输变得牙状.

结论:

MC D2Rs对于正常的DG功能至关重要,通过调节对颗粒细胞的刺激驱动.
功能障碍的MC D2R信号可能会导致焦虑和,将其确定为潜在的治疗标.

关键词:

有牙的吉鲁斯.多巴胺是多巴胺的一种.在海马体内,海马体记忆记忆记忆记忆记忆莫西细胞是什么?

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