Prefrontal Cortex Drives Distinct Projection Neurons in the Basolateral Amygdala.

Prefrontal Cortex Drives Distinct Projection Neurons in the Basolateral Amygdala.
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前额叶皮层驱动杏仁核基底外侧的不同投射神经元

DOI:
10.1016/j.celrep.2017.10.046
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发表时间:
2017-11-07
期刊:
影响因子:
8.8
通讯作者:
Carter AG
Carter AG
中科院分区:
生物学1区
文献类型:
--
作者:
McGarry LM;Carter AG

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前额叶皮层(PFC)通过对基底外侧杏仁核(BLA)的自上而下的控制来调节情绪行为。然而,PFC输入对BLA内不同投射途径的影响在很大程度上仍未被探索。在这里,我们结合联合收割机全细胞记录和光遗传学研究这些细胞类型的特定连接在小鼠BLA。我们表征PFC输入到三个不同的群体的BLA神经元,项目的PFC,腹侧海马或伏隔核。我们发现PFC诱发的突触反应在杏仁核-皮层和杏仁核-海马神经元最强,而在杏仁核-纹状体神经元弱得多。我们评估了这种靶向的机制,并得出结论,它反映了杏仁核-纹状体神经元的连接较少。由于这些细胞具有相似的内在特性,这种连通性允许PFC优先激活杏仁核-皮质和杏仁核-海马神经元。总之,我们的研究结果揭示了PFC输入BLA选择性地驱动反馈预测PFC和前馈预测海马。McGarry和Carter报告称,前额叶皮质(PFC)与BLA中三种不同的投射神经元接触,其中投射回PFC并向前投射到海马的神经元的输入最强,投射到纹状体的神经元的输入最弱。
The prefrontal cortex (PFC) regulates emotional behavior via top-down control of the basolateral amygdala (BLA). However, the influence of PFC inputs on the different projection pathways within the BLA remains largely unexplored. Here we combine whole-cell recordings and optogenetics to study these cell-type specific connections in the mouse BLA. We characterize PFC inputs onto three distinct populations of BLA neurons that project to either the PFC, ventral hippocampus or Nucleus Accumbens. We find that PFC-evoked synaptic responses are strongest at amygdala-cortical and amygdala-hippocampal neurons, and much weaker at amygdala-striatal neurons. We assess the mechanisms for this targeting, and conclude that it reflects fewer connections onto amygdala-striatal neurons. Given the similar intrinsic properties of these cells, this connectivity allows the PFC to preferentially activate amygdala-cortical and amygdala-hippocampal neurons. Together, our findings reveal how PFC inputs to the BLA selectively drive feed-back projections to the PFC and feed-forward projections to the hippocampus. McGarry and Carter report that the prefrontal cortex (PFC) contacts three distinct populations of projection neurons in the BLA, with the strongest inputs onto neurons that project back to PFC and forward to hippocampus, and weakest inputs onto neurons that project to the striatum.
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