摘要
Objective:To investigate the effect of Angiotensin Receptor Neprilysin Inhibitor(ARNI)on ventricular remodeling after AMI in rats.Methods:Sixty male SD rats were randomly divided into Control group,AMI group,AMI-valsartan group,AMI-ARNI group,15 rats in each group,ligating the left coronary anterior descending artery to establish the rat model of AMI.Valsartan group and ARNI group were treated with valsartan(34mg/kg/day)and ARNi(68mg/kg/day)for 6 weeks,the Control group and AMI group were given the same amount of normal saline.LVIDd,LVIDs,EF were measured by color doppler echocardiography before and 6 weeks after treatment.After 6 weeks,the rats were sacrificed,the hearts were weighed,then myocardial tissue Masson staining was performed to calculate the collagen volume fraction(CVF).Results:compared with the control group,LVIDs increased significantly with the reduction of EF in the AMI group,valsartan group and ARNI group(P<0.05).After 6 weeks of treatment,compared with the AMI group,LVIDd and LVIDs both reduced significantly with the increase of EF in the ARNI group(P<0.05).Compared with the control group,the left ventricular weight,right ventricular weight and atrial weight all increased significantly in the AMI group,valsartan group,and ARNI group(P<0.05);compared with the AMI group,the left ventricular weight,right ventricular weight,atrial weight and CVF reduced significantly in the valsartan group and ARNI group(P<0.05);compared with the valsartan group,the left ventricular weight and CVF further reduced in the ARNI group.(P<0.05).Conclusions:ARNI has the effect of reversing ventricular remodeling after AMI in rats,which can reduce left ventricular volume,increase myocardial contractility,and inhibit myocardial cell hypertrophy and fibrosis.
基金
The application of basic research project of Shanxi provincial department of science and technology(No.201901D111445)
