淫羊藿总黄酮注射液对大鼠实验性心肌缺血的保护作用

目的观察淫羊藿总黄酮注射液(epimedium flavonoids injection,EFI)对冠脉结扎所致大鼠抗心肌缺血的作用。方法将大鼠分为6组,麻醉开胸后结扎冠状动脉左前降支复制急性心肌梗死模型。手术后假手术组和模型组静脉注射等容积5%葡萄糖注射液,阳性药组静脉注射硝酸甘油(nitroglycerin,NG)0·3mg/kg,受试药小、中、大剂量组分别静脉注射EFI10、20、40mg/kg。于冠脉结扎前、结扎后及给药后不同时间点监测心电图,标测ST段和T波(ST-T)毫伏数;测定冠脉结扎3h后血清肌酸磷酸激酶、乳酸脱氢酶、超氧化物歧化酶和丙二醛含量;冠脉结扎3h后行心肌氯化硝基四氮唑蓝染色,测算心肌梗死面积。结果静脉注射EFI10、20、40mg/kg可不同程度缩小心肌梗死面积,降低血清肌酸磷酸激酶、乳酸脱氢酶活性和丙二醛水平(P<0·05或P<0·01),同时升高血清超氧化物歧化酶活性(P<0·05或P<0·01),给药后5min即开始降低心电图ST-T的抬高程度,3h后仍有降低ST-T的作用(P<0·05或P<0·01)。结论EFI对冠脉结扎致大鼠心肌缺血具有保护作用,且起效快。

英文摘要:

Objective To investigate the protective effect of epimedium flavonoids Injection (EFI) on experimental acute myocardial infarction (AMI) rats. Methods Rats were randomly divided into 6 groups, the acute myocardial infarction model was established by ligating left anterior descending branch of coronary artery (LAD). After operation, the rats in the sham-operation and model group were intravenous injected with 5% glucose injection, those in the positive medicine group were intravenous injected with nitroglycerin 0.3mg/kg, while rats in the low-, middle- and large-dose EFI group were intravenous injected with TFE in a dose of 10, 20, 40 mg/kg respectively. ECG was monitored before and after coronary artery ligation, and after treatment at different time points. At the same time, the millivolt of ST and ST-T segment were measured. The changes of serum creatine phosphokinase (CPK), lactate dehydrogenase (LDH), superoxide dismutase (SOD) activity and malondialdehyde (MDA) content were determined, and the myocardial infarcted area was detected by MTT respectively 3 h after LAD. Results After intravenous injection of EFI in a dose of 10, 20, 40 mg/kg, the myocardial infarcted area of AMI rats could be decreased in different degree, the activity of serum CPK, LDH and the content of MDA decreased (P<0.05 or P<0.01), while the activity of serum SOD increased significantly (P<0.05 or P<0.01). It could began to lower the elevated ST-T segment 5 min after medication and the action could last for 3 h (P<0.05 or P<0.01). Conclusion EFI has a protective effect against acute myocardial ischemia caused by LAD, and the effect is quickly initiated.

关闭