肝硬化大鼠肾小球血管袢和肾小球前小动脉Ⅰ型1,4,5-三磷酸肌醇受体的表达

目的 探讨跨膜信息传导机制在肝硬化并肝肾综合征发病机制中的作用。 方法 应用40％四氯化碳制备肝硬化动物模型,免疫组织化学方法检测肝硬化大鼠肾小球血管袢和肾小球前小动脉的Ⅰ型1,4,5-三磷酸肌醇受体(IP3R),观察其表达情况。 结果 肾小球血管袢和肾小球前小动脉Ⅰ型IP3R表达,实验组分别为:4.97±1.34、4.09±1.14,正常大鼠组分别为:2.43±1.67、1.83±1.32,两组之间差异有非常显著性,t值分别为3.43和3.70,P值分别为0.0037和0.0022;实验组肾小球血管袢和肾小球前小动脉Ⅰ型IP3R表达,差异有显著性,t值为2.28,P=0.0458。大鼠肾脏常规病理检查均无改变。 结论 跨膜信息传导机制在肝硬化并肝肾综合征发生机制中发挥重要作用。

Expression of type Ⅰ inositol 1,4,5-triphosphate receptor on rat glomerular and afferent arterioles in a model of liver cirrhosis

OBJECTIVE: To study the expression of type I inositol 1,4,5-triphosphate receptor in rat glomerular and afferent arterioles in a model of liver cirrhosis and study the role of cross-membrane message transduction in the pathogenesis of hepatorenal syndrome. METHODS: In a rat model of carbontetrachloride liver cirrhosis, the expression of type I inositol 1,4,5-triphosphate receptor (IP3R) on glomerular and afferent arterioles was measured by immunohistochemical method. RESULTS: In the experimental group, 30 rats were used to make a model of liver cirrhosis. 11 rats survived during the experiment. The expression of type I IP3R on glomerular and afferent arterioles was 4.97+/-1.34 and 4.09+/-1.14 in the liver cirrhosis group, and it was 2.43+/-1.67 and 1.83+/-1.32 in the normal control rats. The differences between these two groups are statistically significant (t = 2.28, P = 0.0458). CONCLUSION: Expression of type I IP3 receptor on rat glomerular and afferent arterioles in a model of liver cirrhosis indicated that the mechanism of cross-membrane message transduction plays a very important role in the pathogenesis of hepatorenal syndrome.