Gq neuromodulation of BLA parvalbumin interneurons induces burst firing and mediates fear-associated network and behavioral state transition in mice.

Gq neuromodulation of BLA parvalbumin interneurons induces burst firing and mediates fear-associated network and behavioral state transition in mice.
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DOI:
10.1038/s41467-022-28928-y
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发表时间:
2022-03-11
影响因子:
16.6
通讯作者:
Tasker JG
Tasker JG
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Fu X;Teboul E;Weiss GL;Antonoudiou P;Borkar CD;Fadok JP;Maguire J;Tasker JG

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杏仁基底外侧核(BLA)网络活动的模式协调对表达恐惧很重要。神经调节系统在调节行为状态之间的变化方面起着至关重要的作用,然而,这种神经调节控制大脑和行为状态之间转换的机制在很大程度上仍不清楚。我们发现,小鼠BLA小白蛋白(PV)中间神经元的化学生成GQ激活和α-1肾上腺素受体激活可诱导PV神经元出现以前未见过的、刻板的时相爆发,并在BLA主神经元引起抑制性突触后电流和时相放电的时间锁定同步爆发。PV神经元的这种GQ偶联受体激活抑制了体内和体外切片模型中的伽马振荡,并促进了恐惧记忆回忆,这与条件性恐惧表达中的血乳酸伽马抑制是一致的。因此,我们在这里确定了BLA的PV抑制中间神经元中的一种神经调制机制,该机制调节BLA网络振荡和恐惧记忆回忆。作者研究了大脑和行为状态之间转换的神经调节控制的潜在机制。他们确定了一种机制,通过调节基底外侧杏仁核小白蛋白中间神经元的GQ活动,介导向恐惧相关网络和行为状态的转变。
Patterned coordination of network activity in the basolateral amygdala (BLA) is important for fear expression. Neuromodulatory systems play an essential role in regulating changes between behavioral states, however the mechanisms underlying this neuromodulatory control of transitions between brain and behavioral states remain largely unknown. We show that chemogenetic Gq activation and α1 adrenoreceptor activation in mouse BLA parvalbumin (PV) interneurons induces a previously undescribed, stereotyped phasic bursting in PV neurons and time-locked synchronized bursts of inhibitory postsynaptic currents and phasic firing in BLA principal neurons. This Gq-coupled receptor activation in PV neurons suppresses gamma oscillations in vivo and in an ex vivo slice model, and facilitates fear memory recall, which is consistent with BLA gamma suppression during conditioned fear expression. Thus, here we identify a neuromodulatory mechanism in PV inhibitory interneurons of the BLA which regulates BLA network oscillations and fear memory recall. The authors study mechanisms underlying neuromodulatory control of transitions between brain and behavioral states. They identify a mechanism whereby modulation of Gq activity in basolateral amygdala parvalbumin interneurons mediates the transition to a fear-associated network and behavioral state.
细胞外田地和电流的起源-EEG,ECOG,LFP和尖峰。
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