A history of human-like dieting alters serotonergic control of feeding and neurochemical balance in a rat model of binge-eating

Academic Article

Abstract

  • Objective: This study replicated a model of stress-induced binge-eating in rats with a history of caloric restriction (HCR), tested their response to SSRI (fluoxetine) treatment, and explored changes in brain monoamine levels. Method: Young female rats with no-HCR/no-Stress, no-HCR/Stress, HCR/no-Stress, and HCR+Stress (binge-eating) were treated with fluoxetine. Post-mortem levels of serotonin, dopamine, and metabolites were assessed from brain regions key to feeding and reward. Results: A 3 mg/kg dose of fluoxetine without effect in the no-HCR groups suppressed intake of HCR groups, normalizing the binge-eating of HCR/Stress rats. No differences in monoamines were detected in the hypothalamus or tegmentum but a strong positive relationship between accumbens serotonin and dopamine turnover in no-HCR rats was absent in rats with HCR. Conclusion: Despite lack of hunger, a history of human-like dieting alters serotonin function in ways suggesting consequences not only to feeding but also control of reward and mood that are dependent on dopamine/serotonin interactions. © 2006 by Wiley Periodicals, Inc.
  • Digital Object Identifier (doi)

    Author List

  • Chandler-Laney PC; Castañeda E; Viana JB; Oswald KD; Maldonado CR; Boggiano MM
  • Start Page

  • 136
  • End Page

  • 142
  • Volume

  • 40
  • Issue

  • 2