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Dysregulated GABAergic inhibition in the amygdala has long been implicated in stress-related neuropsy-chiatric disorders.However,the molecular and circuit mechanisms underlying the dysregulation remain elusive.Here,by using a mouse model of chronic social defeat stress (CSDS),we observed that the dys-regulation varied drastically across individual projection neurons (PNs) in the basolateral amygdala(BLA),one of the kernel amygdala subregions critical for stress coping.While persistently reducing the extrasynaptic GABAA receptor (GABAAR)-mediated tonic current in the BLA PNs projecting to the ventral hippocampus (BLA → vHPC PNs),CSDS increased the current in those projecting to the anterodorsal bed nucleus of stria terminalis (BLA → adBNST PNs),suggesting projection-based dysregulation of tonic inhi-bition in BLA PNs by CSDS.Transcriptional and electrophysiological analysis revealed that the opposite CSDS influences were mediated by loss-and gain-of-function of δ-containing GABAARs (GABAA(δ)Rs) in BLA → vHPC and BLA → adBNST PNs,respectively.Importantly,it was the lost inhibition in the former population but not the augmentation in the latter population that correlated with the increased anxiety-like behavior in CSDS mice.Virally mediated maintenance of GABAA(δ)R currents in BLA → vHPC PNs occluded CSDS-induced anxiety-like behavior.These findings clarify the molecular sub-strate for the dysregulated GABAergic inhibition in amygdala circuits for stress-associated psychopathology.
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篇名 GABAA(δ) receptor hypofunction in the amygdala-hippocampal circuit underlies stress-induced anxiety
来源期刊 科学通报(英文版) 学科
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年,卷(期) 2022,(1) 所属期刊栏目 Life Sciences
研究方向 页码范围 97-110
页数 14页 分类号
字数 语种 英文
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科学通报(英文版)
半月刊
1001-6538
11-1785/N
大16开
北京东黄城根北街16号
2-177
1950
eng
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