Ucp2-dependent microglia-neuronal coupling controls ventral hippocampal circuit function and anxiety-like behavior.

Ucp2-dependent microglia-neuronal coupling controls ventral hippocampal circuit function and anxiety-like behavior.
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DOI:
10.1038/s41380-021-01105-1
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发表时间:
2021-07
影响因子:
11
通讯作者:
Horvath TL
Horvath TL
中科院分区:
医学1区
文献类型:
--
作者:
Yasumoto Y;Stoiljkovic M;Kim JD;Sestan-Pesa M;Gao XB;Diano S;Horvath TL

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Microglia have been implicated in synapse remodeling by phagocytosis of synaptic elements in the adult brain, but the mechanisms involved in the regulation of this process are ill-defined. By examining microglia-neuronal interaction in the ventral hippocampus, we found a significant reduction in spine synapse number during the light phase of the light/dark cycle accompanied by increased microglia-synapse contacts and an elevated amount of microglial phagocytic inclusions. This was followed by a transient rise in microglial production of reactive oxygen species (ROS) and a concurrent increase in expression of uncoupling protein 2 (Ucp2), a regulator of mitochondrial ROS generation. Conditional ablation of Ucp2 from microglia hindered phasic elimination of spine synapses with consequent accumulations of ROS and lysosome-lipid droplet complexes, which resulted in hippocampal neuronal circuit dysfunctions assessed by electrophysiology, and altered anxiety-like behavior. These observations unmasked a novel and chronotypical interaction between microglia and neurons involved in the control of brain functions.
杏仁核活动的前额叶夹带标志着学识渊博的恐惧和天生焦虑中的安全性。
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