ArticleTranslational psychiatry2026
Chronic alcohol exposure contributes to postoperative cognitive dysfunction via NR2B upregulation in the hippocampus of adult mice.
Article in Translational psychiatry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Postoperative cognitive dysfunction (POCD) is a common perioperative complication of the central nervous system, and patients with chronic alcohol exposure frequently require surgery under anesthesia. However, the contribution of chronic alcohol exposure to POCD and its underlying mechanisms remains unclear. In this study, eight-week-old female and male mice were subjected to chronic alcohol exposure using the intermittent access two-bottle choice (IA2BC) paradigm. Compared with controls, mice with chronic alcohol exposure exhibited greater susceptibility to POCD. Specifically, chronic alcohol exposure increased NR2B expression in hippocampal CA1 glutamatergic neurons, enhancing A/S-induced hyperexcitability, which led to neuronal apoptosis and cognitive impairment. Notably, knockdown of NR2B or chemogenetic inhibition of CA1 glutamatergic neurons in IA2BC mice could reduce neuronal apoptosis and rescue A/S-induced cognitive dysfunction. These findings demonstrate that chronic alcohol exposure heightens susceptibility to POCD in young adult mice through NR2B-mediated excitotoxicity, revealing a mechanistic link between chronic alcohol exposure and POCD that warrants further investigation.
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