The Effect of Rebadioside A on Attenuation of Oxidative Stress in Kidney of Mice under Acetaminophen Toxicity

Background: Acetaminophen (APAP) overdose causes renal and hepatic injury. It is also believed that oxidative stress has a pivotal role in APAP-induced renal injury. Therefore, protective effects of different antioxidants have been examined in APAPinduced renal and hepatic toxicity models. Stevia rebadiana is a plant with a high degree of natural antioxidant activity in its leaf extract. The aim of this study was to investigate the possible protective effects of rebadioside A; one of the main components of stevia extract, on APAP-induced oxidative stress in kidney of mice. Methods: Oxidative stress was induced in kidney of BALB/c mice by the intraperitoneal (i.p.) administration of a single dose of 300 mg/kg APAP. Some of these mice also received rebadioside A (700 mg/kg) (i.p.) 30 minutes after APAP injection. Two and six hours after APAP injection, all mice were sacrificed and malondialdehyde (MDA), glutathione (GSH), free APAP, and glutathione conjugated of APAP (APAP-GSH) were determined in the kidney tissue. Results: GSH depletion and MDA levels significantly (P<0.05) increased in mice treated with either APAP or APAP plus Rebadioside A, respectively in 2 and 6 hours intervals after APAP administration. Significantly (P<0.05) higher levels of free APAP and APAP-GSH levels detected in kidney of mice administrated with APAP plus rebadioside A compared to APAP treated ones. Conclusion: Rebadioside A may be a potential compound in alleviation of APAP