Abstract:
:Major depressive disorder is a devastating psychiatric disease that afflicts up to 17% of the world's population. Postmortem brain analyses and imaging studies of patients with depression have implicated basal lateral amygdala (BLA) dysfunction in the pathophysiology of depression. However, the circuit and molecular mechanisms through which BLA neurons modulate depressive behavior are largely uncharacterized. Here, in mice, we identified that BLA cholecystokinin (CCK) glutamatergic neurons mediated negative reinforcement via D2 medium spiny neurons (MSNs) in the nucleus accumbens (NAc) and that chronic social defeat selectively potentiated excitatory transmission of the CCKBLA-D2NAc circuit in susceptible mice via reduction of presynaptic cannabinoid type-1 receptor (CB1R). Knockdown of CB1R in the CCKBLA-D2NAc circuit elevated synaptic activity and promoted stress susceptibility. Notably, selective inhibition of the CCKBLA-D2NAc circuit or administration of synthetic cannabinoids in the NAc was sufficient to produce antidepressant-like effects. Overall, our studies reveal the circuit and molecular mechanisms of depression.
journal_name
Nat Medjournal_title
Nature medicineauthors
Shen CJ,Zheng D,Li KX,Yang JM,Pan HQ,Yu XD,Fu JY,Zhu Y,Sun QX,Tang MY,Zhang Y,Sun P,Xie Y,Duan S,Hu H,Li XMdoi
10.1038/s41591-018-0299-9subject
Has Abstractpub_date
2019-02-01 00:00:00pages
337-349issue
2eissn
1078-8956issn
1546-170Xpii
10.1038/s41591-018-0299-9journal_volume
25pub_type
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