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新皮层恩格拉姆神经元的早期内在刺激性可塑性定义了记忆形成和精度

Senka Hadzibegovic^1,2, Liangying Zhu^1,2, Melanie Ginger^1,2

¹INSERM U1215, Neurocentre Magendie, Bordeaux, France.

Nature communications

|December 5, 2025

概括

在前带皮层 (ACC) 中,学习诱导的神经元内在兴奋性 (IE) 塑性的前带皮层 (ACC) 主要是记忆电图. 这种早期的IE可塑性对于形成特定的,持久的远程记忆至关重要.

科学领域:

神经科学是一个神经科学.
记忆研究记忆研究
细胞可塑性细胞可塑性

背景情况:

相信新皮层记忆录通过增加的相互连接性来成熟.
仅仅是突触可塑性可能无法完全解释长期记忆的生动性.
神经元内在刺激性 (IE) 可塑性被提议作为一种早期的引发神经元启动机制.

研究的目的:

为了研究学习诱导的IE可塑性在前带皮层 (ACC) 恩格拉姆神经元中的作用.
确定IE可塑性是否对远程记忆的形成和特异性至关重要.
阐明在记忆形成过程中IE可塑性的时间动态.

主要方法:

在小鼠中利用了c-fos-依赖的基因/病毒向.
进行化学遗传操纵以调节神经元刺激性.
研究了情境恐惧学习范式.

主要成果:

在早期记忆形成过程中,上下文恐惧学习诱导了ACC内神经元IE的短暂增加.
在IE可塑性窗口内ACC格拉姆神经元的化学遗传超极化增强了整合记忆.
这种干预改善了内存的上下文精度,并防止了因干扰而导致的engram重新分配.

结论:

在新生的ACC神经元中,学习诱导的IE可塑性是远程记忆形成和特异性的允许因素.
IE可塑性作为一个关键的标记机制,影响远程记忆的命运和内容.
这种可塑性窗口对于稳定记忆痕迹和保持上下文精度至关重要.

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Long-term Potentiation

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Long-term Potentiation

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Neuroplasticity

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Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.