Protective effect of crocetin on isoproterenol-induced myocardial injury in rats / 中草药

ABSTRACT

Object To study the protective effect of crocetin on myocardial ischemia induced by isoproterenol (ISO). Methods Myocardial ischemia was induced by subcutaneous injection of ISO (30 mg/kg for two days, once a day). The experimental animals were randomly divided into the normal group, ISO group, positive control group and three crocetin groups (25, 50, 100 mg/kg). Cardiac indexes were examined. The level of LDH, CK, MDA in serum were measured. The content of MDA, GSH-Px and the ATPase activity heart and mitochondria were assayed by colorimetric analysis. The histopathological change of myocardia was investigated by HE staining. Results Compared with the model group, crocetin can significantly reduce the cardiac indexes, obviously decrease the level of MDA, LDH and CK in the serum. Crocetin can significantly increase the activities of Na +, K +-ATPase; Ca 2+ , Mg 2+ -APTase; GSH-Px. The histopathological changes confirmed the protective effects of crocetin on the myocardial injury. Conclusion Crocetin could alleviate the acute myocardial ischemia induced by ISO in rats.