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Behav Brain Res. 2016 Jul 1;307:25-34. doi: 10.1016/j.bbr.2016.03.046. Epub 2016 Mar 29.

Nociceptin receptor antagonist SB 612111 decreases high fat diet binge eating.

Author information

1
Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, NC, USA; UNC Department of Pharmacology, University of North Carolina at Chapel Hill, NC, USA.
2
UNC Department of Psychiatry, University of North Carolina at Chapel Hill, NC, USA; UNC Department of Nutrition, University of North Carolina at Chapel Hill, NC, USA; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
3
Bowles Center for Alcohol Studies, University of North Carolina at Chapel Hill, NC, USA; UNC Department of Pharmacology, University of North Carolina at Chapel Hill, NC, USA. Electronic address: thomas_kash@med.unc.edu.

Abstract

Binge eating is a dysregulated form of feeding behavior that occurs in multiple eating disorders including binge-eating disorder, the most common eating disorder. Feeding is a complex behavioral program supported through the function of multiple brain regions and influenced by a diverse array of receptor signaling pathways. Previous studies have shown the overexpression of the opioid neuropeptide nociceptin (orphanin FQ, N/OFQ) can induce hyperphagia, but the role of endogenous nociceptin receptor (NOP) in naturally occurring palatability-induced hyperphagia is unknown. In this study we adapted a simple, replicable form of binge eating of high fat food (HFD). We found that male and female C57BL/6J mice provided with daily one-hour access sessions to HFD eat significantly more during this period than those provided with continuous 24h access. This form of feeding is rapid and entrained. Chronic intermittent HFD binge eating produced hyperactivity and increased light zone exploration in the open field and light-dark assays respectively. Treatment with the potent and selective NOP antagonist SB 612111 resulted in a significant dose-dependent reduction in binge intake in both male and female mice, and, unlike treatment with the serotonin selective reuptake inhibitor fluoxetine, produced no change in total 24-h food intake. SB 612111 treatment also significantly decreased non-binge-like acute HFD consumption in male mice. These data are consistent with the hypothesis that high fat binge eating is modulated by NOP signaling and that the NOP system may represent a promising novel receptor to explore for the treatment of binge eating.

KEYWORDS:

Binge eating; Fluoxetine; High fat; Hyperphagia; Intermittent access; Nociceptin

PMID:
27036650
PMCID:
PMC4896639
DOI:
10.1016/j.bbr.2016.03.046
[Indexed for MEDLINE]
Free PMC Article

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