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Updated: Jun 28, 2025

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空间编码功能障碍和网络不稳定性在老化中介内腔皮层中

Charlotte S Herber^1,2, Karishma J B Pratt^3,4, Jeremy M Shea^3,4

¹Department of Neurobiology, Stanford University School of Medicine, Stanford, CA, 94305, USA.

bioRxiv : the preprint server for biology

|April 25, 2024

概括

衰老会通过破坏神经网络功能的稳定而损害空间记忆,而神经网络的功能是在中枢内腔皮层 (MEC) 中. 空间编码的这种与年龄相关的下降与MEC 内神经元中的基因表达改变有关.

科学领域:

神经科学是一个神经科学.
衰老研究研究衰老研究
认知神经科学认知神经科学

背景情况:

空间记忆对于导航至关重要,在不同物种中随着年龄的增长而下降.
这种下降可能源于海马体和中枢内腔皮层 (MEC) 的变化.
衰老对MEC中细胞和网络级空间编码的确切影响尚不清楚.

研究的目的:

调查老年介质内皮层 (MEC) 中空间编码的完整性.
识别与年龄相关的空间记忆缺陷相关的分子和网络变化.

主要方法:

在年轻,中年和老年小鼠在虚拟环境中使用体内电生理学.
评估了电网电池的发射模式和稳定性.
对老老鼠的MEC组织进行了转录基因分析.

主要成果:

陈旧的电网细胞表现出特定环境空间发射的稳定性受损,与记忆缺陷相关.
陈旧的MEC网络显示出不稳定的点火模式,与环境环境变化的调整差.
在老年MEC中鉴定了458个差异表达的基因,其中61个与空间燃烧稳定性相关,富含内部神经元和突触传输通路.

结论:

衰老破坏了介质内耳皮层中细胞和网络层面的空间编码完整性.
转录基因变化,特别是内部神经元的变化,与衰老中的空间发射稳定性受损和记忆缺陷有关.
这些发现突出了与年龄相关的空间记忆衰退背后的协调的分子,细胞和网络机制.

关键词:

衰老的衰老衰老的衰老网格细胞是一个网格细胞.中间内皮层 (medial entorhinal cortex) 是一个内皮层.空间记忆是一种空间记忆.翻译学翻译学翻译学翻译学

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