Journal article
A High-Fat Meal, or Intraperitoneal Administration of a Fat Emulsion, Increases Extracellular Dopamine in the Nucleus Accumbens
Brain sciences, v 2(2), pp 242-253
11 Jun 2012
PMID: 24962774
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Evidence links dopamine (DA) in the nucleus accumbens (NAc) shell to the ingestion of palatable diets. Less is known, however, about the specific relation of DA to dietary fat and circulating triglycerides (TG), which are stimulated by fat intake and promote overeating. The present experiments tested in Sprague-Dawley rats whether extracellular levels of NAc DA increase in response to acute access to fat-rich food or peripheral injection of a fat emulsion and, if so, whether this is related to caloric intake or elevated circulating lipids. When rats consumed more calories of a high-fat meal compared with a low-fat meal, there was a significant increase in extracellular accumbens DA (155%
vs.
119%). Systemic injection of a fat emulsion, which like a high-fat diet raises circulating TG but eliminates the factor of taste and allows for the control of caloric intake, also significantly increased extracellular levels of DA (127%) compared to an equicaloric glucose solution (70%) and saline (85%). Together, this suggests that a rise in circulating TG may contribute to the stimulatory effect of a high-fat diet on NAc DA.
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Details
- Title
- A High-Fat Meal, or Intraperitoneal Administration of a Fat Emulsion, Increases Extracellular Dopamine in the Nucleus Accumbens
- Creators
- Pedro Rada - University of the AndesNicole M. Avena - Princeton UniversityJessica R. Barson - Rockefeller UniversityBartley G. Hoebel - Princeton UniversitySarah F. Leibowitz - Rockefeller University
- Publication Details
- Brain sciences, v 2(2), pp 242-253
- Publisher
- MDPI
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Neurobiology and Anatomy; College of Medicine; Drexel University
- Web of Science ID
- WOS:000214888700008
- Scopus ID
- 2-s2.0-84907018964
- Other Identifier
- 991020100189504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Neurosciences