A new GABAergic somatostatin projection from the BNST onto accumbal parvalbumin neurons controls anxiety.

A new GABAergic somatostatin projection from the BNST onto accumbal parvalbumin neurons controls anxiety.
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一种新的 GABA 能生长抑素从 BNST 投射到累积小白蛋白神经元上控制焦虑

DOI:
10.1038/s41380-020-0816-3
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发表时间:
2021-09
影响因子:
11
通讯作者:
Wang L
Wang L
中科院分区:
医学1区
文献类型:
--
作者:
Xiao Q;Zhou X;Wei P;Xie L;Han Y;Wang J;Cai A;Xu F;Tu J;Wang L

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目前普遍认为,小白蛋白(PV)中间神经元通过局部中棘投射神经元(MSNs)在情绪反应中发挥调节作用。在这里,我们表明,PV活动内的核壳(sNAc)是需要产生焦虑样的回避时,小鼠在焦虑的情况下。sNAcPV神经元的放电率与开放臂(威胁环境)中的探索时间呈负相关。此外,sNAcPV神经元在慢性应激小鼠模型中表现出高兴奋性,这在焦虑背景下产生过度的适应不良回避行为。我们还发现了一个新的GABA能通路从终纹前背床核(adBNST)的sNAcPV神经元。这些传入末梢在sNAc的光遗传激活产生的抗焦虑作用,通过GABA的传输。接下来,我们进一步证明了慢性应激减弱了adBNSTGABA → sNAcPV突触的抑制性突触传递,这反过来解释了应激模型上sNAc PV神经元的过度兴奋性。因此,激活sNAc中的这些GABA能传入可以挽救与焦虑状态相关的过度回避行为。最后,我们确定了支配sNAcPV细胞的大多数GABA能输入神经元表达生长抑素(SOM),并且还揭示了BNST → NAc回路中SOM-和PV-细胞之间的协调对焦虑样反应具有抑制作用。我们的研究结果为病理性焦虑的治疗干预提供了潜在的神经生物学基础。
The prevailing view is that parvalbumin (PV) interneurons play modulatory roles in emotional response through local medium spiny projection neurons (MSNs). Here, we show that PV activity within the nucleus accumbens shell (sNAc) is required for producing anxiety-like avoidance when mice are under anxiogenic situations. Firing rates of sNAcPV neurons were negatively correlated to exploration time in open arms (threatening environment). In addition, sNAcPV neurons exhibited high excitability in a chronic stress mouse model, which generated excessive maladaptive avoidance behavior in an anxiogenic context. We also discovered a novel GABAergic pathway from the anterior dorsal bed nuclei of stria terminalis (adBNST) to sNAcPV neurons. Optogenetic activation of these afferent terminals in sNAc produced an anxiolytic effect via GABA transmission. Next, we further demonstrated that chronic stressors attenuated the inhibitory synaptic transmission at adBNSTGABA → sNAcPV synapses, which in turn explains the hyperexcitability of sNAc PV neurons on stressed models. Therefore, activation of these GABAergic afferents in sNAc rescued the excessive avoidance behavior related to an anxious state. Finally, we identified that the majority GABAergic input neurons, which innervate sNAcPV cells, were expressing somatostatin (SOM), and also revealed that coordination between SOM- and PV- cells functioning in the BNST → NAc circuit has an inhibitory influence on anxiety-like responses. Our findings provide a potentially neurobiological basis for therapeutic interventions in pathological anxiety.
在大鼠和人类中持续的恐惧:恐惧与焦虑中的杏仁核的作用。
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