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<dc:title xml:lang="fr">Altérations de la voie dopaminergique mésolimbique dans un modèle murin de dépression induite par la douleur chronique</dc:title>
<dcterms:alternative xml:lang="en">Alterations of the mesolimbic dopaminergic pathway in a mouse model of chronic pain-induced depression</dcterms:alternative>
<dc:subject xml:lang="fr">Aire tegmentale ventrale</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 neuropathique augmente considérablement le risque de développer un épisode dépressif caractérisé et de nombreuses études suggèrent l’implication du système dopaminergique (DA) mésolimbique, et en particulier de l’aire tegmentale ventrale (VTA), dans l’expression de cette comorbidité douleur-dépression. Cette thèse combine des approches comportementales, physiologiques et moléculaires afin d’étudier les altérations de ce système dans un modèle de souris exprimant la comorbidité douleur-dépression. Nous mettons notamment en évidence une sous-population de neurones DA de la VTA antérieure dont l’activité électrophysiologique est diminuée dans le modèle. L’étude de la dynamique de libération de la dopamine dans le noyau accumbens révèle des altérations lors de la mise en place des comportements de type dépressif. Dans l’ensemble ces données révèlent la complexité des altérations lors de la mise en place et de l’expression de la comorbidité douleur-dépression.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Neuropathic pain significantly increases the risk of developing a major depressive disorder, and several studies suggest the implication of the mesolimbic dopaminergic (DA) system and in particular the ventral tegmental area (VTA) in the expression of this pain-depression comorbidity. This thesis combines behavioral, physiological and molecular approaches to study alterations in this system in a mouse model of chronic pain induces depression. In particular, we highlight a decrease in the electrophysiological activity of a subpopulation of DA neurons in the anterior VTA. Moreover, the study of dopamine release dynamics in the nucleus accumbens reveals alterations during the onset of depressive-type behaviours. Taken together, these data reflect the complexity of alterations in the development and expression of pain-depression comorbidity.</dcterms:abstract>
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