Abstract
A simple and validated high-performance liquid chromatography (HPLC) method with UV detection has been used to determine the content of andrographolide (AP) and 14-deoxy-11,12-didehydroandrographolide (DIAP) in rat plasma after oral dose of methanol extract (1g/kg body weight) of Andrographis paniculata leaf. An increase in plasma concentration of AP and DIAP was observed from 30min to 3h after oral administration of the extract. The maximum plasma concentrations of AP and DIAP were 1.42±0.09μg/ml and 1.31±0.04μg/ml, respectively. Fourteen days oral treatment of rats with the methanol extract (1g/kg body weight) followed by CCl4 administration preserved catalase (CAT), and superoxide dismutase (SOD) activities in erythrocytes, whereas plasma lipid peroxidation, alanine transaminase (ALT) and aspartate transaminase (AST) activities were restored to values comparable with control values. Treatment of rats with CCl4 did not showed significant alteration (p>0.05) in plasma total antioxidant status (TAS) as compare to values of control group.
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