Cardioprotective effects of on the isolated rat heart in ischemia-reperfusion.

CONTEXT

There are some reports about protective effects of on the heart.

OBJECTIVE

We investigated the effect of extract on cardiac function during ischemia-reperfusion (I/R) injury in the isolated rat heart.

MATERIALS AND METHODS

60 male Wistar rats were randomly divided into 6 groups; 1: Control group, 2: Control-ischemia (CI) 3: vitamin C (10 mg/kg), 4-6: Extract groups (E 100, E 200 and E 400 mg/kg). The animals received normal saline, vitamin C or extract orally for 4 weeks. At the end of the treatment, the hearts were subjected to in vitro I/R Injury (20 min of global ischemia, followed by 40 min of reperfusion, Langendorff's mode). Heart rate (HR) and left ventricular pressure (LVP) were measured using a pressure transducer connected to a data acquisition system. Lactate dehydrogenase (LDH) and creatine kinase (CK) activities in the effluent were measured to determine the myocardial injury degree. The malondialdehyde (MDA), total thiol groups (-SH), superoxide anion dismutase (SOD) and catalase (CAT) in myocardial tissue were detected to determine the oxidative stress degree.

RESULTS

Pretreatment with significantly decreased the LDH, CK activities, and MDA level, while it increased the LVDP, ±, rate-pressure product (RPP), SH groups, SOD and CAT activities, and also the coronary artery flow.

DISCUSSION AND CONCLUSION

Our findings indicated that could provide protection for heart against the I/R injury which may be related to the improvement of myocardial oxidative stress states.