Journal
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
Volume 29, Issue 2, Pages 158-166Publisher
ELSEVIER
DOI: 10.1016/j.etap.2009.12.006
Keywords
Quercetin; Lead; Oxidative stress; Apoptosis; Rat liver
Funding
- National Natural Science Foundation of China [30950031]
- Major Fundamental Research Program of Natural Science Foundation of the Jiangsu Higher Education Institutions of China [07KJA36029]
- Fundamental Research Program of Natural Science Foundation of the Jiangsu Higher Education Institutions of China [07KJD180210]
- Natural Science Foundation [08XLR08, 09XLY06]
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Quercetin, a flavonoid, effectively improved the lead-induced histology changes including structure damage and leukocyte infiltration in rat liver. The present study was designed to explore the protective mechanism of quercetin against lead-induced hepatic injury. We found that quercetin markedly decreased the MDA and H2O2 levels and lowered the GSH/GSSG ratio in the liver of lead-treated rat. Moreover, quercetin markedly restored Cu/Zn-SOD, Mn-SOD, CAT and GPx activities and upregulated mRNA expression levels of these proteins in the liver of lead-treated rat. Western blot analysis showed that quercetin significantly inhibited apoptosis by modulating the ratio of Flax to Bcl-2 expression and Suppressing the expression of phosphorylated JNK1/2 and cleaved caspase-3 in the liver of lead-treated rat. In conclusion, these data suggest that quercetin protects the rat liver from lead-induced injury by attenuating lipid peroxidation, renewing the activities of antioxidant enzymes and inhibiting apoptosis. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
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