title: Dietary quercetin supplementation increases serum antioxidant capacity and alters hepatic gene expression profile in rats.
abstract: The aim of this study was to determine the effect of quercetin on hepatic gene expression profile in rats. Twenty male Wistar rats were divided into the control group and the quercetin-treated group, in which a diet containing 0.5% quercetin was provided. After two weeks of feeding, serum and liver samples were collected. Biomarkers of oxidative stress, including serum ferric reducing antioxidant power (FRAP) values and levels of ascorbic acid, vitamin E (VE), glutathione (GSH) and malondialdehyde (MDA) were measured. The hepatic gene expression profile was examined using a microarray technique. The results showed that serum FRAP value, levels of ascorbic acid and VE were increased significantly, whereas serum levels of GSH and MDA were not changed significantly after quercetin supplementation. The microarray analysis revealed that some hepatic genes involved in phase 2 reaction, metabolism of cholesterol and homocysteine, and energy production were expressed differentially in response to quercetin administration. These findings provide a molecular basis for the elucidation of the actions played by quercetin in vivo.
authors.affiliation: Institute of Hygiene and Environmental Medicine, No. 1 Dali Road, Tianjin, China.
authors.forename: Liting
authors.initials: L
authors.lastname: Zhao
authors.forename: Jianquan
authors.initials: J
authors.lastname: Wu
authors.forename: Jijun
authors.initials: J
authors.lastname: Yang
authors.forename: Jingyu
authors.initials: J
authors.lastname: Wei
authors.forename: Weina
authors.initials: W
authors.lastname: Gao
authors.forename: Changjiang
authors.initials: C
authors.lastname: Guo
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage*; D001205:Ascorbic Acid / Q000097:blood; D020869:Gene Expression Profiling; D005978:Glutathione / Q000097:blood; D008099:Liver / Q000187:drug effects* / Q000378:metabolism*; D008315:Malondialdehyde / Q000097:blood; D046228:Microarray Analysis; D011794:Quercetin / Q000008:administration & dosage*; D051381:Rats; D017208:Rats, Wistar; D044967:Serum / Q000737:chemistry*; D014810:Vitamin E / Q000097:blood
chemical_list: D000975:Antioxidants; D014810:Vitamin E; D008315:Malondialdehyde; D011794:Quercetin; D005978:Glutathione; D001205:Ascorbic Acid