柴苓汤对环孢素A肾病大鼠肾小管上皮细胞表型转化的抑制作用

目的 观察柴苓汤对环孢素A肾病大鼠肾小管上皮细胞表型转化标志物α-平滑肌肌动蛋白(α-smooth muscular actin，α-SMA)的影响，探讨其抑制肾间质纤维化的作用机制。

Inhibitory Effect of Chailing Decoction on Renal Tubular Epithelial Phenotype Transformation in Rats with Cyclosporine A-induced Nephropathy

Objective To observe the effect of Chailing Decoction （CLD） on α-smooth muscular actin （α-SMA,a marker of renal tubular epithelial phenotype transformation） in rats with cyclosporine A （CsA）-induced nephropathy for investigate its mechanism of action in inhibiting tubulo-interstitial fibrosis. Methods Forty Sprague-Dawley rats were equally randomized into four groups：the normal group,the model group,the positive control group and the Chinese medicine（CM） group. Excepting those in the normal group received gastrogavage with olive oil,rats in the other three groups were made into nephropathy model by oral infusion of CsA 30mg/（kg·d） for 28 days. At the same time of modeling,rats in the positive control and CM groups were treated respectively with Valsartan 10 mg/（kg·d） and CLD 3 g/（kg·d）. The mRNA and protein expressions of α-SMA in rats＇ kidney were detected by RT-PCR,Western blot,immunohistochemical and flow cytometry,and the mRNA expressions of transforming growth factor-β1 （TGF-β1） and collagen type Ⅲ （ColⅢ） were determined by RT-PCR. Results Levels of α-SMA,TGF-β1 and Col Ⅲ were significantly higher in the model group than those in the normal group respectively （P0.01 or P0.05）,and the high levels were down-regulated in the positive control and CM groups after treatment （P0.01 or P0.05）. Conclusion CLD could retard the progress of renal interstitial fibrosis by way of inhibiting renal tubular epithelial phenotype transformation.