The endocannabinoid system is modulated in reward and homeostatic brain regions following diet-induced obesity in rats: a cluster analysis approach
Autor: | Mary C. Olmstead, Alexandra Hertz, Romain Bourdy, Yannick Goumon, Katia Befort, Dominique Filliol, Virginie Andry, Jorge E. Mendoza |
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Přispěvatelé: | Laboratoire de neurosciences cognitives et adaptatives (LNCA), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut des Neurosciences Cellulaires et Intégratives (INCI), Goumon, Yannick, Queen's University [Kingston, Canada] |
Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
0301 basic medicine
Male medicine.medical_specialty Cannabinoid receptor Dopamine Medicine (miscellaneous) 030209 endocrinology & metabolism Nucleus accumbens Biology [SCCO]Cognitive science 03 medical and health sciences Eating 0302 clinical medicine Reward Internal medicine medicine Animals Cluster Analysis Obesity Rats Wistar 2. Zero hunger 030109 nutrition & dietetics Nutrition and Dietetics Leptin receptor Mass spectrometry digestive oral and skin physiology Diet-induced obesity Brain [SCCO] Cognitive science Original Contribution Endocannabinoid system 3. Good health Diet Rats Ventral tegmental area medicine.anatomical_structure Endocrinology Brain stimulation reward Ghrelin Gene expression [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition medicine.drug Endocannabinoids |
Zdroj: | European Journal of Nutrition European Journal of Nutrition, Springer Verlag, 2021, ⟨10.1007/s00394-021-02613-0⟩ European Journal of Nutrition, 2021, 60 (8), pp.4621-4633. ⟨10.1007/s00394-021-02613-0⟩ |
ISSN: | 1436-6215 1436-6207 |
Popis: | Objectives Increased availability of high-calorie palatable food in most countries has resulted in overconsumption of these foods, suggesting that excessive eating is driven by pleasure, rather than metabolic need. The behavior contributes to the rise in eating disorders, obesity, and associated pathologies like diabetes, cardiac disease, and cancers. The mesocorticolimbic dopamine and homeostatic circuits are interconnected and play a central role in palatable food intake. The endocannabinoid system is expressed in these circuits and represents a potent regulator of feeding, but the impact of an obesogenic diet on its expression is not fully known. Methods Food intake and body weight were recorded in male Wistar rats over a 6-week free-choice regimen of high fat and sugar; transcriptional regulations of the endocannabinoid system were examined post-mortem in brain reward regions (prefrontal cortex, nucleus accumbens, ventral tegmental area, and arcuate nucleus). K-means cluster analysis was used to classify animals based on individual sensitivity to obesity and palatable food intake. Endocannabinoid levels were quantified in the prefrontal cortex and nucleus accumbens. Gene expression in dopamine and homeostatic systems, including ghrelin and leptin receptors, and classical homeostatic peptides, were also investigated. Results The free-choice high-fat -and sugar diet induced hyperphagia and obesity in rats. Cluster analysis revealed that the propensity to develop obesity and excessive palatable food intake was differently associated with dopamine and endocannabinoid system gene expression in reward and homeostatic brain regions. CB2 receptor mRNA was increased in the nucleus accumbens of high sugar consumers, whereas CB1 receptor mRNA was decreased in obesity prone rats. Conclusions Transcriptional data are consistent with observations of altered dopamine function in rodents that have access to an obesogenic diet and point to cannabinoid receptors as GPCR targets involved in neuroplasticity mechanisms associated with maladaptive intake of palatable food. Supplementary Information The online version contains supplementary material available at 10.1007/s00394-021-02613-0. |
Databáze: | OpenAIRE |
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