Sex differences in binge eating patterns in male and female adult rats

Kelly L. Klump · Sarah Elizabeth Racine · Britny A. Hildebrandt · Cheryl L. Sisk

125 citations0/0 files storedInternational Journal of Eating Disorders

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Eating Disorders and Behaviors Nutrition, Health and Food Behavior Regulation of Appetite and Obesity

Abstract

OBJECTIVE: Several efforts are underway to model binge eating in animals in order to advance neurobiological models of risk. However, knowledge of sex differences in these models is currently lacking. The goal of the present study was to examine sex differences in binge eating phenotypes using a well-established rodent model (i.e., the binge eating resistant/binge eating prone model). METHOD: Thirty male and 30 female adult Sprague-Dawley rats were exposed to feeding tests consisting of intermittent access to palatable food (PF). Rats were then categorized as binge eating prone (BEP) based on the amount and consistency of PF consumption across tests. RESULTS: Across multiple methods for BEP classification, rates of BEP phenotypes were two to six times higher in female than male rats. DISCUSSION: Findings provide support for sex differences in rodent models of binge eating and highlight the promise of the BER/BEP model for understanding neurobiological mechanisms underlying sex differences in risk.

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References

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2015Current Considerations Regarding Food Addiction 2017Emotional Eating, Binge Eating and Animal Models of Binge-Type Eating Disorders 2014Influences of Ovarian Hormones on Dysregulated Eating 2017Sex Differences in Obesity and Mental Health 2017Sex Differences in Binge Eating: Gonadal Hormone Effects Across Development

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