加味镇眩颗粒对高血压大鼠心肌基质金属蛋白酶-2和微血管密度的影响

目的 观察加味镇眩颗粒对自发性高血压大鼠(SHR)血浆血管紧张素Ⅱ(AngⅡ)、心肌基质金属蛋白酶-2(MMP-2)表达水平和微血管密度(MVD)的影响.方法 将50只SHR大鼠随机分为加味镇眩颗粒高剂量组、加味镇眩颗粒中剂量组、加味镇眩颗粒低剂量组、卡托普利组、SHR对照组,经过12周的干预,分别测定动物血压变化,血浆Ang Ⅱ含量、免疫组织化学法检测心肌MMP-2蛋白表达水平、心肌微血管密度.结果 治疗组均可降低SHR血压、血浆Ang Ⅱ含量、心肌MMP-2蛋白表达水平.增加SHR心肌微血管密度.与SHR组相比差异具有统计学意义(P<0.05),中药组中,加味镇眩颗粒高剂量组效果最好.与卡托普利组相比,高剂量组在12周末降压效果相当(P>0.05),且更能降低心肌MMP-2蛋白表达水平(P<0.05),增加SHR心肌微血管密度(P<0.05).结论 加味镇眩颗粒可降低SHR血压,可能与降低血浆血管紧张素Ⅱ含量,下调心肌MMP-2蛋白表达水平,改善SHR大鼠心肌微血管稀疏的作用有关.

Effects of Zhenxuan Granules Treatment on the Expression of Myocardial Matrix Metalloproteinase-2 and Microvessel Density in Rats with Spontaneously Hypertensivon

Objective To examine the effect of Zhenxuan granules treatment on the level of plasma Ang II,expression of myocardial matrix metalloproteinase-2 and the microvessel density in spontaneously hypertensive rats (SHR). Methods 50 male SHRs were randomly divided into 5 groups,namely the high-dose,middle-dose and low-dose Zhenxuan granule treatment group,captopril group and the SHR control group. Blood pressure was recorded from the tail artery at the beginning and every 4 weeks during the 12 weeks treatment. At ...