Binge eating of a high fat diet during adolescence modulates the rewarding effects of ethanol
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Blanco Gandía, María del Carmen; Ballestín Hinojosa, Raúl; Reguilón, Marina D.; Ferrer Pérez, Carmen; Navarrete, Francisco; Manzanedo Pérez, Carmen; Arenas, María del Carmen; Manzanares, Jorge; Miñarro López, José; Rodríguez Arias, Marta
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Aquest document és un/a Comunicació/Ponència, creat/da en: 2018
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Binge-eating is considered a specific form of overeating characterized by intermittent and high caloric food intake in a short period of time. Epidemiologic studies support a positive relation between the ingestion of fat and ethanol (EtOH), specifically among adolescent subjects.
The aim of this work was to clarify the role of the compulsive, limited and intermittent intake of a high-fat food during adolescence on the rewarding effects of EtOH. After binge eating for 2 h, three days a week from postnatal day 29, the reinforcing effects of EtOH were tested with EtOH self-administration (SA) and conditioned place preference (CPP).
Animals in the high fat binge (HFB) group that underwent the EtOH SA procedure presented greater EtOH consumption and a higher motivation to obtain the drug. HFB mice also developed preference for the paired compartment in the CPP with a subthreshold dose of EtOH. After the SA procedure, HFB mice exhibited reduced levels of the mu opioid receptor (MOr) and increased cannabinoid 1 receptor gene expression in the nucleus accumbens (N Acc), and decreased of tyrosine hydroxylase gene expression in the ventral tegmental area (VTA). Taken together the results suggest that bingeing on fat may represent a vulnerability factor to an escalation of EtOH consumption.
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