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在金字塔神经元上抑制海马体帕瓦胺内部神经元参与LPS诱导的认知功能障碍

Xiaoxiang Tan¹, Hongyu Ma², Xinqi Guo²

¹Department of Anesthesiology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu Province, China.

Neuroscience letters

|December 30, 2023

概括

脂聚糖 (LPS) 通过损害海马体内的帕瓦胺 (PV) 内神经元,引发认知衰退. 恢复PV内部神经元功能可以改善记忆缺陷,这表明它在神经炎症引起的认知功能障碍中起着关键作用.

科学领域:

神经科学是一个神经科学.
认知科学认知科学
免疫学免疫学免疫学

背景情况:

海马体金字塔神经元的脆弱性是认知障碍的核心.
神经炎症,微质激活和帕瓦尔胺 (PV) 内神经元功能障碍有助于认知缺陷.
关联微质激活与认知功能障碍的确切机制尚不清楚.

研究的目的:

调查微质激活是否诱导PV内部神经元损伤和金字塔神经元抑制.
确定这些变化在脂聚糖 (LPS) 诱导的认知功能障碍中的作用.

主要方法:

在使用LPS注射的小鼠中建立了全身炎症模型.
利用化学遗传学来操纵海马体CA1区域的PV内部神经元活动.
进行全细胞补丁记录以评估金字塔神经元中的突触电流.

主要成果:

这种LPS挑战导致记忆缺陷,微质激活,并降低了海马体金字塔神经元中的PV水平和抑制电流.
米诺环素治疗逆转了这些LPS诱导的效应.
对PV内部神经元的化学遗传激活改善了记忆和突触功能,独立于微细胞调节.

结论:

由PV内部神经元阻断海马金字塔神经元的抑制作用与LPS诱导的认知功能障碍有关.
准PV内部神经元功能可能为神经炎症相关的认知障碍提供治疗策略.

关键词:

认知功能障碍认知功能障碍在LPS中使用LPS.微质细胞中的微质细胞在神经元内部的帕尔瓦尔胺.金字塔神经元是一种神经元.

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