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<dc:title xml:lang="en">The role of GABAergic dysfunction in the anterior cingulate cortex in chronic pain-induced depression</dc:title>
<dcterms:alternative xml:lang="fr">Le rôle de la dysfonction GABAergique dans le cortex cingulaire antérieur dans la dépression induite par la douleur chronique</dcterms:alternative>
<dc:subject xml:lang="fr">Douleur chronique</dc:subject>
<dc:subject xml:lang="fr">Dépression</dc:subject>
<dc:subject xml:lang="fr">Neurones GABAergiques</dc:subject>
<dc:subject xml:lang="fr">Cortex cingulaire antérieur</dc:subject>
<dc:subject xml:lang="fr">Inhibition altérée</dc:subject>
<dc:subject xml:lang="fr">Co-libération GABA/glutamate</dc:subject>
<dc:subject xml:lang="en">Chronic pain</dc:subject>
<dc:subject xml:lang="en">Depression</dc:subject>
<dc:subject xml:lang="en">GABAergic neurons</dc:subject>
<dc:subject xml:lang="en">Anterior cingulate cortex</dc:subject>
<dc:subject xml:lang="en">Impaired inhibition</dc:subject>
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<tef:elementdEntree autoriteExterne="029645972" autoriteSource="Sudoc">Douleur chronique</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">La douleur chronique et la dépression coexistent fréquemment, mais les mécanismes cellulaires sous-jacents restent mal compris. Nous avons étudié si les neurones inhibiteurs du cortex cingulaire antérieur (ACC), une région clé de l’intégration affective et sensorielle, contribuent à cette comorbidité. Nous avons constaté que les neurones GABAergiques de l’ACC présentent une inhibition altérée en condition de douleur chronique, avec une diminution de l’activité synaptique inhibitrice et une libération réduite de GABA. Le profilage transcriptomique a confirmé une baisse de l’expression des gènes soutenant la fonction inhibitrice et a identifié une augmentation de Slc17a6 (VGLUT2), indiquant l’acquisition de caractéristiques excitatrices par une partie des neurones GABAergiques. Ensemble, nos résultats montrent que l’association d’une inhibition déficiente et d’une excitation aberrante dans les neurones GABAergiques de l’ACC constitue un mécanisme cellulaire reliant douleur chronique et dépression, et mettent en évidence la signalisation NMDA comme cible thérapeutique potentielle.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Chronic pain and depression frequently co-occur, but the underlying cellular mechanisms are unclear. We asked whether inhibitory neurons in the anterior cingulate cortex (ACC), a key hub for affective–sensory integration, contribute to this comorbidity. We found that GABAergic neurons in the ACC show impaired inhibition in chronic pain, with reduced synaptic inhibitory activity and diminished GABA release. Transcriptomic profiling confirmed downregulation of genes supporting inhibitory function and identified upregulation of Slc17a6 (VGLUT2), indicating a shift toward excitatory features in some GABAergic neurons. Together, our results identify impaired inhibition combined with aberrant excitation in ACC GABAergic neurons as a cellular mechanism linking chronic pain and depression and highlight NMDA signaling as a potential therapeutic target.</dcterms:abstract>
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