Preventive Effects of Zingerone on Altered Lipid Peroxides and Nonenzymatic Antioxidants in the Circulation of Isoproterenol‐Induced Myocardial Infarcted Rats

The present study was designed to evaluate the preventive effects of zingerone on circulatory lipid peroxides and nonenzymatic antioxidants in isoproterenol‐induced myocardial infarcted rats. Rats were pretreated with zingerone (6 mg/kg body weight) daily for a period of 14 days and were then induced myocardial infarction with isoproterenol (100 mg/kg body weight) on 15th and 16th day. Increased intensities of serum lactate dehydrogenase isoenzymes 1 and 2 bands enhanced plasma lipid peroxidation products and lowered nonenzymatic antioxidant system were noted in isoproterenol‐induced rats. Pretreatment with zingerone daily for 14 days revealed significant preventive effects on the electrophoretic and biochemical parameters evaluated in isoproterenol‐induced rats. Furthermore, the in vitro study confirmed the potent antioxidant activity of zingerone. The results of our study showed that zingerone protected the rat's heart against isoproterenol‐induced myocardial infarction by its antioxidant effect.