1. Intermittent access to sugary drinks associated with fasting induces overeating and depressive-like behavior in female C57BL/6J mice.
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Parron Paim, Mariana, Nornberg Strelow, Dianer, Devantier Krüger, Letícia, Sander Magalhães, Larissa, Hall, Tácia Katiane, Brüning, César Augusto, and Folharini Bortolatto, Cristiani
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BINGE-eating disorder , *FOOD habits , *DIETARY patterns , *MONOAMINE oxidase , *FOOD consumption - Abstract
[Display omitted] • Intermittent sucrose/fasting protocol led to overeating behavior. • Animals with loss-control eating also showed depressive-like behavior. • Fasting itself did not induce depressive-like or sucrose overeating behavior. • Activity of monoamine oxidases was disrupted in overeating mice. • Sucrose-exposed mice tend to exhibit increased risk behavior after 20 h-fasting. Binge eating disorder is the most prevalent eating disorder, affecting both sexes but more commonly found in women. Given the frequent co-occurrence of psychiatric disorders, this study aimed to establish a standardized experimental intermittent protocol to investigate overeating associated with depression. A 10-day protocol induced uncontrolled eating behavior in C57BL/6J female mice. The first experiment included the following groups: naive group (chow ad libitum), control group (chow and sucrose solution ad libitum), and fasting groups (16 and 20 h) exposed to an intermittent sucrose solution (10 %) and chow regimen. Subsequently, the feeding test, open field test, elevated plus maze test, tail suspension test, and light/dark conflict test were conducted. Furthermore, monoamine oxidase (MAO) A and B activities in brain structures and plasma corticosterone levels were assessed. Food overconsumption and depressive-like behavior were observed in both sucrose fasting groups, while risk-taking behaviors were specifically observed in the 20-hour fasting sucrose group. While both fasting sucrose groups caused reduced hippocampal MAO-A activity, only the F20 sucrose group inhibited MAO-B in the cortex and hypothalamus. Moreover, both fasting sucrose groups exhibited elevated corticosterone levels. In a separate design (Experiment 2), groups with 16 and 20 h of fasting alone (without sucrose) did not show the same behavioral results as the intermittent fasting sucrose groups, thus avoiding fasting bias. Based on these results, the 20-hour sucrose fasting group was chosen as the ideal protocol for mimicking overeating behavior associated with depression to investigate future therapeutic approaches for this comorbidity. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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