突触传输的多重变化是压力诱导的下降的基础,使皮层皮层持续燃烧
Archana Proddutur1, Daniel J Rindner1, Ghalia Azouz2
1Department of Neurobiology and Behavior, University of California Irvine, McGaugh Hall, Irvine, CA, 92697.
Progress in neurobiology
|February 28, 2026
概括
青少年重复的压力会损害神经元发射在后顶层皮质 (PPC) 的持续性. 这种认知障碍源于激发性和抑制性突触传输的综合变化,而不是单个因素.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 计算神经科学是一种神经科学.
背景情况:
- 压力显著影响认知功能,如注意力和工作记忆.
- 持续的神经元发射对于维持认知过程至关重要.
- 压力对持续的神经元活动的影响在很大程度上是未知的.
研究的目的:
- 调查重复的青少年压力 (aRMS) 如何影响后壁皮质皮质 (PPC) 5 层金字塔神经元 (L5 PNs) 的持续发射.
- 阐明负责神经活动中压力诱导变化的潜在神经机制.
主要方法:
- 计算建模用于预测改变持续发射的机制.
- 全细胞补丁电生理学在男性小鼠的急性脑切片中.
- 分析内在刺激性,局部连接性和突触传输 (谷氨酸和GABAergic).
主要成果:
- aRMS 降低了 PPC 中 L5 PNs 的持续燃烧能力.
- 压力对神经元刺激性和反复连接性影响最小.
- 刺激性连接显示了变化的衰变动力学和短期动态.
- 抑制性音调增加,GABAa和GABAb受体反应发生改变.
- 计算模型表明,改变激发性和抑制性突触传输的组合是复制压力效应所必需的.
结论:
- 重复的青少年压力通过损害PPC中持续的神经元发射来破坏认知功能.
- 观察到的缺陷是由于激发性和抑制性突触传输变化的复杂相互作用造成的.
- 这些发现强调了压力对神经电路功能和认知表现的多方面的影响.
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