帕瓦胺内部神经元上的α含GABAA受体调节小鼠中部前额叶皮层中的神经元刺激性和网络动态
bioRxiv : the preprint server for biology
|June 25, 2024
概括
删除介质前额皮层 (mPFC) 帕瓦尔胺 (PV) 内神经元中的含有德尔塔的GABAA受体,增加了它们的兴奋性. 这影响金字塔神经元的突触抑制,并改变整体皮质电路功能.
科学领域:
- 神经科学是一个神经科学.
- 细胞神经科学 细胞神经科学
- 系统神经科学 系统神经科学
背景情况:
- 介面前额皮层 (mPFC) 中快速升的帕瓦胺 (PV) 内神经元对于认知功能至关重要.
- 这些PV内部神经元表达含有delta (δ) 的GABAA受体,它们介导缓慢的抑制,但它们在PV内部神经元功能中的具体作用尚不清楚.
研究的目的:
- 为了研究mPFC PV 内神经元中含有δ的GABAA受体的功能意义.
- 确定这些受体的选择性删除如何影响PV内部神经元刺激性,突触抑制和局部电路活性.
主要方法:
- 使用条件淘汰 (cKO) 鼠标模型,在PV 内神经元中选择性地删除δ子单元.
- 在急性mPFC切片中进行电生理学记录 (电流,电压),以评估细胞和突触性质.
- 分析了本地现场潜力 (LFPs) 来评估网络活动.
主要成果:
- 与野生类型 (WT) 相比,缺少 δ 子单元 (cKO) 的光伏内神经元表现出较高的发射频率和输入电阻.
- 药理学操纵证实了d-含有受体在调节WT PV内部神经元发射和金字塔神经元抑制中的作用.
- 网络刺激显示,cKO PV内部神经元更容易被招募,改变了mPFC电路中激发和抑制的平衡.
结论:
- 在mPFC PV内部神经元中含有δ-含GABAA受体对于调节它们的内在刺激性至关重要.
- 这些受体在介导金字塔神经元的相位抑制中发挥着关键作用,从而控制皮质电路动力学.
- 这些发现阐明了PV内部神经元对mPFC功能和认知的贡献的新机制.
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