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ABSTRACT Quercetin has potent antioxidant action and a hepatoprotective role. The aim of this study was to evaluate the hepatoprotective action of quercetin pretreatment in paracetamol-induced liver damage (PILD) and structural injury resulting from partial hepatectomy (PH). In the first model, Wistar rats received oral quercetin (50mg/kg/day) during 8 days. On the 8th day, 3g/kg paracetamol were added. In the second model, the same quercetin dose was given during 7 days and rats were submitted to PH on the 8th day. Blood samples were obtained for determination of enzyme levels. Liver, heart, kidney and lung tissue were also collected for assessment of quercetin biodistribution and/or histological analyses. The results obtained after PILD were more pronounced at 24 hours, as reflected by the reduction of serum ALT levels and by the lower concentration of quercetin in liver at this time point. Quercetin also had a protective effect in groups submitted to PH, as shown by decreased ALT levels after 18 hours, and of AST levels after 18 and 36h. The reduction in serum AST and ALT levels suggest that treatment with quercetin is useful as a preoperative pharmacologic measure and for prevention of liver damage caused by drugs

Hepatoprotective Effect of Quercetin Pretreatment Against Paracetamol-Induced Liver Damage and Partial Hepatectomy in Rats