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<dc:title xml:lang="fr">Rôle du noyau tegmental rostromédian dans la prise alimentaire</dc:title>
<dcterms:alternative xml:lang="en">Role of the rostromedial tegmental nucleus in food intake</dcterms:alternative>
<dc:subject xml:lang="fr">Noyau tegmental rostromédian</dc:subject>
<dc:subject xml:lang="fr">Aire tegmentale ventrale</dc:subject>
<dc:subject xml:lang="fr">Hypothalamus latéral</dc:subject>
<dc:subject xml:lang="fr">Lésion projection-spécifique</dc:subject>
<dc:subject xml:lang="fr">Obésité</dc:subject>
<dc:subject xml:lang="fr">Hyperphagie boulimique</dc:subject>
<dc:subject xml:lang="fr">Système endocannabinoïde</dc:subject>
<dc:subject xml:lang="en">Rostromedial tegmental nucleus</dc:subject>
<dc:subject xml:lang="en">Ventral tegmental area</dc:subject>
<dc:subject xml:lang="en">Lateral hypothalamus</dc:subject>
<dc:subject xml:lang="en">Projection-specific lesion</dc:subject>
<dc:subject xml:lang="en">Obesity</dc:subject>
<dc:subject xml:lang="en">Binge eating</dc:subject>
<dc:subject xml:lang="en">Endocannabinoid system</dc:subject>
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<tef:elementdEntree autoriteExterne="040822737" autoriteSource="Sudoc">Aire tegmentale ventrale</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="197288898" autoriteSource="Sudoc">Accès hyperphagiques</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Le noyau tegmental rostromédian (RMTg) est une structure cérébrale projetant l’aire tegmentale ventrale (VTA) et l’hypothalamus latéral (LH), centres régulateurs de la prise alimentaire. Le RMTg est encore peu étudié et il est envisageable qu’il participe à la dérégulation de la prise alimentaire observée dans l’obésité et l’hyperphagie boulimique. Nous avons d’abord étudié le rôle des voies RMTg-VTA et RMTg-LH dans la régulation de la prise alimentaire chez le rat grâce à une approche innovante de lésion projections-spécifiques, suivie d’une exposition à un régime obésogène (modèle d’obésité). Nous avons ensuite étudié les adaptations du système endocannabinoïde (ECS) dans les régions du circuit de la récompense dans des modèles d'obésité et d'hyperphagie boulimique. La voie RMTg-VTA et RMTg-LH module respectivement la consommation d’aliments gras et standard. L'analyse moléculaire a révélé une dérégulation distincte de l’expression de l’ECS dans les modèles d’obésité et d’hyperphagie boulimique, notamment au sein du RMTg. Ces résultats soulignent le rôle du RMTg et de l’ECS dans les pathologies associées à une dérégulation de la prise alimentaire.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The rostromedial tegmental nucleus (RMTg) is a brain structure projecting to the ventral tegmental area (VTA) and the lateral hypothalamus (LH), two key regulatory centers for feeding behavior. The function of the RMTg remains mostly unknown, and it is plausible that this region plays a role in food intake dysregulation as observed in obesity and binge-eating disorders. We firstly studied the role of the RMTg-VTA and RMTg-LH pathways in food intake regulation through a projection-specific lesional approach followed by a 6-week exposure to an obesogenic diet. Then, we analyzed and compared the adaptations of the endocannabinoid system (ECS), an endogenous system regulating food intake, within reward-related brain regions in obesity and binge-eating disorder models. Our results indicate that the RMTg-VTA and RMTg-LH pathways respectively modulate high-fat and standard food consumption. The molecular analysis revealed distinct dysregulation of ECS expression in obesity and binge-eating disorder, particularly within the RMTg. These findings underscore the involvement of the RMTg and the ECS in pathologies characterized by dysregulated food intake.</dcterms:abstract>
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