IgA肾病小鼠肾脏系膜细胞凋亡及其调控基因Bax和Bcl-2表达的变化及益肾汤对其的影响

目的探讨InA肾病（IgAN）小鼠肾脏系膜细胞凋亡及其调控基因Bax和Bcl-2表达的特点及中药益肾汤对其的影响。方法用“口服牛血清白蛋白加葡萄球菌肠毒索B尾静脉注射”法复制小鼠IgA肾病模型。实验动物分为正常组、模型组、益肾汤低浓度组及益肾汤高浓度组。HE染色光镜下观察肾小球系膜细胞增殖；原位末端标记法检测小鼠系膜细胞凋亡；免疫组化SABC法观察系膜区Bax和Bcl-2的表达。结果模型组小鼠肾脏系膜细胞凋亡显著弱于正常组（P〈0．05）；正常组与模型组之间Bax表达差异无显著性（P〉0．05），而模型组小鼠Bcl-2的表达则明显强于正常组（P〈0．05）；益肾汤低浓度及高浓度组之间肾小球系膜细胞凋亡率差异无显著性（P〉0．05）；益肾汤低浓度及高浓度组与模型组比较，Bax表达均增强（P〈0．05）、而Bcl-2表达则均减弱（P〈O．05）。结论IgAN小鼠存在明显的系膜细胞凋亡不足；益肾汤可通过调控系膜区Bax和Bcl-2的表达、诱导IgAN肾脏系膜细胞凋亡，进而抑制系膜增殖。

Influence of TCM Yishen Decoction on the apoptosis and its modulating genes Bax and Bcl-2 of mesangial cells of mice with IgA nephropathy

Objective] To study the influence of TCM Yishen Decoction on the apoptosis and its modulating genes Bax and Bcl-2 of mesangial cells of mice with IgA nephropathy. Method] The IgAN model was built by the method of oral intake of bovine serum albumin (BSA) together with the injection of staphylococcus enterotoxin B (SEB) through caudal vein. Mice were treated with TCM Yishen Decoction. The TUNEL method was adopted to detect the mesangial cell apoptosis. The Bax and Bcl-2 proteins were detected by immunohist...