摘要：SummaryAlthough stressful events predispose individuals to psychiatric disorders, such as depression, not all people who undergo a stressful life experience become depressed, suggesting that gene-environment interactions (GxE) determine depression risk. The ventral hippocampus (vHPC) plays key roles in motivation, sociability, anhedonia, despair-like behaviors, anxiety, sleep, and feeding, pointing to the involvement of this brain region in depression. However, the molecular mechanisms underlying the cross talk between the vHPC and GxE in shaping behavioral susceptibility and resilience to chronic stress remain elusive. Here, we show that Ca2+/calmodulin-dependent protein kinase IIβ (CaMKIIβ) activity in the vHPC is differentially modulated in GxE mouse models of depression susceptibility and resilience, and that CaMKIIβ-mediated TARPγ-8 phosphorylation enhances the expression of AMPA receptor subunit GluA1 in the postsynaptic sites to enable stress resilience. We present previously missing molecular mechanisms underlying chronic stress-elicited behavioral changes, providing strategies for preventing and treating stress-related psychiatric disorders.Graphical abstractDisplay OmittedHighlights•CaMKIIβ activity is differentially modulated in a depression/resilience GxE model•CaMKIIβ activity is critical for determining stress susceptibility and resilience•CaMKIIβ-mediated TARPγ-8 activation exerts pro-resilience effects•TARPγ-8-mediated synaptic expression of GluA1 confers chronic stress resiliencyBehavioral neuroscience; Molecular neuroscience; Cellular neuroscience.
