PAI-1在IgA肾病小鼠肾组织中表达的变化及益肾汤对其的影响

目的探讨IgA肾病（IgAN）小鼠肾组织Ⅰ型纤溶酶原激活物抑制因子（PAI-1）含量及其mRNA表达的特点及益肾汤对其的影响。方法用“口服牛血清白蛋白联合尾静脉注射葡萄球菌肠毒素B”法复制小鼠IgAN模型。设正常组、模型组、益肾汤高浓度治疗组和益肾汤低浓度治疗组。FQ-PCR法检测小鼠肾组织PAl-1mRNA表达、免疫组化SABC法检测小鼠肾组织PAI-1的含量。结果模型组小鼠肾组织PAl-1含量及其mRNA表达显著高于正常组（P〈0．05）；益肾汤低浓度及高浓度组小鼠肾组织PAl-1含量及其mRNA表达分别与模型组比较差异均有统计学意义（P〈0.05）；益肾汤低浓度及高浓度组之间PAI-1含量及其mRNA表达差异无统计学意义（P〉0．05）。结论IgAN肾组织PAl-1含量及mRNA的表达均明显增加；益肾汤可显著减少IgAN小鼠肾组织中PAI-1的含量及抑制其mRNA表达。

The effects of TCM YiShen decoction on the expression of PAI-1 in kidney tissue of mice with IgA nephropathy

Objective To explore mRNA and protein expression of PAl-1 in kidney tissue of mice with IgA nephropathy (IgAN) and the effects of YiShen Decoction. Methods 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. The mRNA expression of PAI-1 was measured by fluorescent quantitative polymerase chain reaction (FQ-PER)and the expression of PAI-1 protein was measured by immunohistochemistry. Results No significant difference of mRNA and protein expression of PAI-1 was found between the low concentration and high concentration Yishen Decoction group. But the secretion and mRNA expression of PAI-1 in the low and hiigh concentration Yishen Decoction group was decreased more than that in the IgAN model group. Conclusion The abnormal expression of PAI-1 mRNA and protein played an important role in the onset and development of IgAN. The TCM Yishen Decoction could reduce the abnormal expression of the mRNA and protein of PAI-1 in kidney tissue of mice with IgA nephropathy.