不同内径银夹诱导2K1C高血压模型的比较

目的: 比较不同内径银夹缩窄大鼠肾动脉诱导的2K1C高血压模型效果。方法: 用U型银夹缩窄大鼠右侧肾动脉建立2K1C高血压模型,分为4组:假手术组、2K1C-0.2 mm 组、2K1C-0.25 mm 组和2K1C-0.3 mm 组。0~8周内,用无创尾动脉压测量仪测量大鼠尾动脉压。第8周末,BL-420S生物机能实验系统监测各组动物的心功能,计算大鼠心重量指数(HW/BW)、左和右肾脏重量指数(LKW/BW和RKW/BW),HE染色观察胸主动脉重构情况,比色法测定心肌组织羟脯氨酸含量,放免法测定血清中血管紧张素II(Ang II)的含量。结果: 与假手术组比较,2K1C-0.25 mm 组和2K1C-0.3 mm 组,成模率高、肾脏固缩少,心功能损伤明显,HW/BW、羟脯氨酸和Ang II的含量明显升高,胸主动脉发生明显重构;而2K1C-0.2 mm 组,成模率低、肾脏固缩多,心功能损伤不明显。结论: 0.25 mm 和 0.3 mm 内径的银夹诱导的2K1C肾性高血压模型,成模率高,模型更稳定。

Comparison of different inner diameter silver clip impact on 2K1C hypertension model

AIM: To compare the effect of three different inner diameter silver clips on 2K1C hypertensive rats.METHODS: A 2K1C hypertensive rats were established by narrow the right renal artery with different inner diameter of U-shaped silver clips. Animals were divided into 4 groups: the sham-operate group, 2K1C-0.2 mm group, 2K1C-0.25 mm group and 2K1C-0.3 mm group. The tail-cuff apparatus was employed to measure the rat tail arterial blood pressure during the 0-8 weeks. At the end of 8^th wk, the hemodynamics index recorded. The cardiac and kidney hypertrophy index were expressed as heart weight/body weight (HW/BW), left kidney weight/body weight (LKW/BW) and right kidney weight/body weight (RKW/BW). The aorta remodeling was investigated by HE stain. The content of hydroxyproline in myocardial tissue was measured by colorimetric determination. Radioimmunoassay method was used to detected the AngII content in serum.RESULTS: The 2K1C-0.25 group and 2K1C-0.3 group showed the higher model successful rate, less pyknotic kidneys, significant impairment of cardiac function, markedly increasing of HW/BW, vascular remodeling index, the content of hydroxyproline and the AngII content compared with sham-operate group. However, the 2K1C-0.2 group performed not well in model successful rate, pyknotic kidneys and the AngII content in serum.CONCLUSION: The 2K1C renovascular hypertension model that narrow the renal artery with 0.25 or 0.3 mm inner diameter of U-shaped silver clips proves to be the optimal one.