Objective To compare the effects of telmisartan and (or) amlodipine on the reversal left ventricular re-modeling in two-kidney one clip hypertensive rats. Methods A total of 50 healthy male SD rats were randomly divided into 5 groups (n=10):two-kidney one clip renal hypertensive (2KIC) model group, sham group, telmisartan (10 mg/kg) group, am-lodipine (2.5 mg/kg) group and telmisartan (10 mg/kg)+amlodipine(2.5 mg/kg) group. The model of two-kidney one clip re-nal hypertensive rats was established. The tail arterial blood pressure was detected once a week. After 20 weeks, rats were sacrificed and specimens were collected. The left ventricular mass index (LVMI) was assessed. The myocardial ultrastructur-al changes were observed by electron microscope. Values of plasma renin activity (PRA), angiotensionⅡ(AngⅡ) and atrial natriuretic peptide (ANP) were measured by enzyme linked immunosorbent assay (ELISA).Results Compared with sham group, the levels of systolic blood pressure (SBP), LVMI, PRA, AngⅡand ANP were significantly higher in 2KIC group (P<0.01). Compared with 2KIC group, values of SBP, LVMI, PRA and ANP were significantly lower in telmisartan group and am-lodipine group (P<0.01), but the value of AngⅡwas significantly higher (P<0.01). The levels of SBP, LVMI, AngⅡand ANP were significantly lower in combined medication group than those of single drug medication group (P<0.01). There was no significant difference in the plasma PRA level between those groups (P>0.05). Results of myocardial electron microsco-py showed that the left ventricular remodeling was significantly improved in combined treatment group. Conclusion Telmisartan and amlodipine can effectively improve the left ventricular remodeling induced by hypertension. There was more effective therapy using both medications together.%目的：比较替米沙坦、氨氯地平以及两者联用治疗肾性高血压大鼠左室重构的效果。方法健康雄性SD大鼠50只，随机分成两肾一夹高血压模型组（2KIC组）、假手术组、替米沙坦（10 mg/kg）给药组、氨氯地平（2.5 mg/kg）给药组、替米沙坦（10 mg/kg）+氨氯地平（2.5 mg/kg）给药组，每组10只；每周测1次尾动脉压。20周后，采用酶联免疫法检测血浆肾素活性（PRA）、血管紧张素Ⅱ（AngⅡ）、心钠素（ANP）含量。取心脏测定左室质量指数（LVMI），观察心肌电镜超微结构。结果2KIC组的收缩压（SBP）、LVMI、PRA，AngⅡ、ANP含量均高于假手术组（P<0.01）；各单用药组的SBP、LVMI、PRA、ANP含量均低于2KIC组（P<0.01），AngⅡ含量高于2KIC组（P<0.01）；联合用药组的SBP、LVMI、AngⅡ、ANP含量明显低于各单用药组（P<0.01），血浆PRA水平差异无统计学意义（P＞0.05）。心肌电镜结果显示联合用药能更显著改善高血压大鼠左室重构。结论替米沙坦和氨氯地平均能有效地改善高血压左室重构，两者联用效果更明显。
展开▼
