ArticleScientific reports2025
Environmental enrichment alleviates neuropathic pain-associated anxiety by enhancing the function of parvalbumin interneurons in the anterior cingulate cortex.
Article in Scientific reports, 2025. 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
Chronic neuropathic pain is often accompanied with comorbid anxiety. However, effective interventions for this anxiety are highly limited. This study aims to examine the effect of environmental enrichment (EE) on spared nerve injury (SNI)-induced neuropathic pain-associated anxiety behaviors and explore the mechanisms underlying this effect. EE effectively ameliorated anxiety-like behaviors followed by SNI. EE also significantly reversed the phenotypic loss of parvalbumin (PV) interneurons in the anterior cingulate cortex (ACC) and impaired gamma oscillations under SNI-induced neuropathic pain conditions. In addition, EE reversed the SNI-induced reduction in the number of PV puncta around Ca²⁺/calmodulin-dependent protein kinase II-positive neurons. Furthermore, enhancing the function of PV interneurons could effectively improve the SNI-caused anxiety-like behaviors. In contrast, the inhibition of PV interneurons led to anxiety-like behaviors in naïve mice. Our findings suggest that EE significantly improves anxiety-like behaviors under neuropathic pain conditions, likely by enhancing the function of PV interneurons in ACC.
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