Abstract
Quercetin has attracted much attention recently because of its antioxidant capacity and potential in the prevention of chronic degenerative diseases. However, its actions and the mechanisms involved are not completely understood. In this study, male Wistar rats were fed a diet containing 0.5% quercetin for 14 days. Serum samples were collected at the end of the experiment, and the overall serum metabolic profile was investigated by (1)H nuclear magnetic resonance (NMR)-based metabolomic analysis. Remarkable changes in the serum metabolic profile were manifested with the relative increase in the levels of lactate and low-density lipoprotein/very low-density lipoprotein (LDL/VLDL) and reduction in glucose, high-density lipoprotein (HDL), and some amino acids after quercetin exposure. Biochemical measurements confirmed that the serum low-density lipoprotein cholesterol (LDL-C) level was increased significantly after quercetin treatment. Our current findings indicate that quercetin can induce a remarkable change in cholesterol metabolism. Further studies are needed to investigate the molecular mechanisms and the possible links to the health effects or toxic actions of quercetin.
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