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Cardio-protective Effects of Corocalm (疏冠胶囊) on Acute Myocardial Ischemia/Reperfusion Injury in Rats

刘建勋  李欣志  马晓斌  林成仁  王杨慧  马雪瑛  王敏  
【摘要】:正Objective: To investigate the cardio-protective effects of Corocalm (疏冠胶囊)on acute myocardial ischemia in rats, and to explore its possible therapeutic mechanisms. Methods: The acute ischemic model was prepared by ligating the left anterior descending (LAD) coronary artery in rats. The animals were divided into 6 groups, 8 in each group. The sham operated group underwent heart exposure without ligation and were treated with normal saline 3 ml/kg, while the other 5 groups, the model groups, consisted of acceptable acute ischemic model rats and were also treated with normal saline, with the Guanxin Capsule (冠心胶囊,GXC) group treated with refined GXC, 600 mg/kg, the low and high dose Corocalm groups treated with 85 mg/kg and 340 mg/kg of Corocalm respectively, and the Diltiazem group, treated with Diltiazem 5 mg/kg, with all the tested drugs prepared with normal saline into equal volume (3 ml/kg) and administrated once via duodenum 10 min before ligation. Myocardial infarction area was determined by the quantitative histoiogical assay with nitroblue tetrazolium (N-BT) stain. And the levels of creatine phosphokinase (CK), lactate dehydrogenase (LDH), malondialdehyde (MDA) content, and the activity of superoxide dismutase (SOD) in serum were measured by biochemical assay and spectrophotometry respectively. Besides, the blood viscosity in another 50 rats was determined, who received for 7 successive days oral administration with different concentration of Corocalm or aspirin. Results: It showed that low and high dose Corocalm could significantly reduce the infarction area, inhibit the increase of serum CK, LDH activity and MDA content, and enhance the SOD activity after ischemia/reperfusion. The whole blood viscosity at different shear rates in rats treated with high dose Corocalm was significantly lower than those treated with normal saline (P0.05).Conclusion: Corocalm has favourable protective effects on heart in ischemic condition, the effect of which might be through its actions in inhibiting CK and LDH activity, scavenging oxygen free radicals, and lowering blood viscosity.

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