Astrocytic determinant of the fate of long-term memory.

IF 5.4 2区 医学 Q1 NEUROSCIENCES
Glia Pub Date : 2025-02-01 Epub Date: 2024-11-04 DOI:10.1002/glia.24636
Hiroki Yamao, Ko Matsui
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引用次数: 0

Abstract

While some vivid memories are unyielding and unforgettable, others fade with time. Astrocytes are recognized for their role in modulating the brain's environment and have recently been considered integral to the brain's information processing and memory formation. This suggests their potential roles in emotional perception and memory formation. In this study, we delve into the impact of amygdala astrocytes on fear behaviors and memory, employing astrocyte-specific optogenetic manipulations in mice. Our findings reveal that astrocytic photoactivation with channelrhodopsin-2 (ChR2) provokes aversive behavioral responses, while archaerhodopsin-T (ArchT) photoactivation diminishes fear perception. ChR2 photoactivation amplifies fear perception and fear memory encoding but obstructs its consolidation. On the other hand, ArchT photoactivation inhibits memory formation during intense aversive stimuli, possibly due to weakened fear perception. However, it prevents the decay of remote fear memory over three weeks. Crucially, these memory effects were observed when optogenetic manipulations coincided with the aversive experience, indicating a deterministic role of astrocytic states at the exact moment of fear experiences in shaping long-term memory. This research underscores the significant and multifaceted role of astrocytes in emotional perception, fear memory formation, and modulation, suggesting a sophisticated astrocyte-neuron communication mechanism underlying basic emotional state transitions of information processing in the brain.

决定长期记忆命运的星形胶质细胞
有些生动的记忆坚贞不屈、难以忘怀,而有些记忆则会随着时间的流逝而逐渐消失。星形胶质细胞在调节大脑环境方面的作用已得到公认,最近又被认为是大脑信息处理和记忆形成不可或缺的一部分。这表明星形胶质细胞在情绪感知和记忆形成中具有潜在的作用。在本研究中,我们通过对小鼠进行星形胶质细胞特异性光遗传操作,深入研究了杏仁核星形胶质细胞对恐惧行为和记忆的影响。我们的研究结果表明,星形胶质细胞的channelrhodopsin-2(ChR2)光激活会引发厌恶行为反应,而archaerhodopsin-T(ArchT)光激活则会降低恐惧知觉。ChR2 光激活会增强恐惧感知和恐惧记忆编码,但会阻碍其巩固。另一方面,在强烈的厌恶刺激下,ArchT 光激活会抑制记忆的形成,这可能是由于恐惧感知减弱所致。然而,它却能防止远距离恐惧记忆在三周内衰减。最重要的是,当光遗传学操作与厌恶体验同时发生时,就能观察到这些记忆效应,这表明在恐惧体验的确切时刻,星形胶质细胞状态在塑造长期记忆中起着决定性作用。这项研究强调了星形胶质细胞在情绪感知、恐惧记忆形成和调节中的重要和多方面作用,表明在大脑信息处理的基本情绪状态转换中,存在着一种复杂的星形胶质细胞-神经元交流机制。
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来源期刊
Glia
Glia 医学-神经科学
CiteScore
13.10
自引率
4.80%
发文量
162
审稿时长
3-8 weeks
期刊介绍: GLIA is a peer-reviewed journal, which publishes articles dealing with all aspects of glial structure and function. This includes all aspects of glial cell biology in health and disease.
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