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Mesolimbic dopamine and its neuromodulators in obesity and binge eating
journal contribution
posted on 2023-05-22, 23:46 authored by Naef, L, Kimberley PitmanKimberley Pitman, Borgland, SLObesity has reached epidemic prevalence, and much research has focused on homeostatic and nonhomeostatic mechanisms underlying overconsumption of food. Mesocorticolimbic circuitry, including dopamine neurons of the ventral tegmental area (VTA), is a key substrate for nonhomeostatic feeding. The goal of the present review is to compare changes in mesolimbic dopamine function in human obesity with diet-induced obesity in rodents. Additionally, we will review the literature to determine if dopamine signaling is altered with binge eating disorder in humans or binge eating modeled in rodents. Finally, we assess modulation of dopamine neurons by neuropeptides and peripheral peptidergic signals that occur with obesity or binge eating. We find that while decreased dopamine concentration is observed with obesity, there is inconsistency outside the human literature on the relationship between striatal D2 receptor expression and obesity. Finally, few studies have explored how orexigenic or anorexigenic peptides modulate dopamine neuronal activity or striatal dopamine in obese models. However, ghrelin modulation of dopamine neurons may be an important factor for driving binge feeding in rodents.
History
Publication title
CNS spectrumsPagination
1-10ISSN
1092-8529Department/School
Menzies Institute for Medical ResearchPublisher
M B L CommunicationsPlace of publication
United StatesRepository Status
- Restricted