Abstract
This experiment examined dopamine D2 receptor and its transporter (DAT) density in mice fed a high-fat or low-fat diet for twenty days as well as fed twenty days of high-fat diet then changed to low-fat diet for one and seven days. Quantitative autoradiography revealed that twenty days of high-fat diet consumption significantly increased D2 receptor and decreased DAT density in the dorsal and ventral parts of the caudal caudate putamen (D2: 32% and 35% respectively, DAT: 33.3% and 28.8% respectively) compared with low-fat diet. High-fat feeding also increased D2 binding in the nucleus accumbens shell (36%). D2 receptor and DAT density remained unchanged following reversal of the diets from high-fat to low-fat diet. The high-fat diet induced increase of D2 receptor and decrease of DAT binding may have occurred due to defensive control over dopaminergic activity in response to a positive energy balance.
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South, T., Huang, XF. High-Fat Diet Exposure Increases Dopamine D2 Receptor and Decreases Dopamine Transporter Receptor Binding Density in the Nucleus Accumbens and Caudate Putamen of Mice. Neurochem Res 33, 598–605 (2008). https://doi.org/10.1007/s11064-007-9483-x
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DOI: https://doi.org/10.1007/s11064-007-9483-x