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Uncoupling proteins (UCPs) are members of the mitochondrial anion carrier superfamily involved in the control of body temperature and energy balance regulation. They are currently proposed as therapeutic targets for treating obesity and metabolic syndrome (MetS). We studied the gene expression regulation of UCP1, -2, and -3 in abdominal white adipose tissue (WAT) from control and MetS rats treated with two doses of a commercial mixture of resveratrol (RSV) and quercetin (QRC). We found that UCP2 was the predominantly expressed isoform, UCP3 was present at very low levels, and UCP1 was undetectable. The treatment with RSV + QRC did not modify UCP3 levels; however, it significantly increased UCP2 mRNA in control and MetS rats in association with an increase in oleic and linoleic fatty acids. WAT from MetS rats showed a significantly increased expression of peroxisome proliferator-activated receptor (PPAR)-α and PPAR-γ when compared to the control group. Furthermore, PPAR-α protein levels were increased by the highest dose of RSV + QRC in the control and MetS groups. PPAR-γ expression was only increased in the control group. We conclude that the RSV + QRC treatment leads to overexpression of UCP2, which is associated with an increase in MUFA and PUFA, which might increase PPAR-α expression.

international journal of molecular sciences

The Effect of Resveratrol and Quercetin Treatment on PPAR Mediated Uncoupling Protein (UCP-) 1, 2, and 3 Expression in Visceral White Adipose Tissue from Metabolic Syndrome Rats