黄芪对糖尿病小鼠肾脏基因表达谱的影响

Effect of Astragalus mongholicus on renal gene expression profile in mice with diabetic nephropathy

目的:应用基因芯片技术研究黄芪对糖尿病肾病小鼠肾脏基因表达谱的影响。方法:分别检测黄芪治疗组、未经治疗糖尿病肾病组、正常组小鼠肾脏基因的差异表达变化,筛选出差异表达基因,用生物信息学对检测结果进行分析,应用半定量RT-PCR验证差异表达基因。结果:2张芯片相比,经黄芪治疗后糖尿病小鼠肾脏发生显著性差异表达变化的基因共有88个基因同时发生改变,其中81个表现为相反方向的改变,7个表现为相同方向的改变。差异表达基因主要涉及的功能有:物质代谢、炎症与免疫反应、信号转导等。结论:黄芪可通过多种途径在基因水平上起到对糖尿病肾病的保护作用,对物质代谢相关基因影响更为明显。

Objective： To study the effect of Astragalus mongholicus on renal gene expression profile in mice with diabetic nephropathy by cDNA microarray. Method： The mice with diabetic nephropathy were fed A. mongholicus and normal saline respectively. cDNA microarray was used to measure gene expression profile in renal tissue after 12 weeks, and the data were analyzed by bioinformatics. RT-PCR was performed to detect the relative levels of some genes which were randomly selected. Result： Eighty eight genes were found differently expressed in two chips. Among these genes, 81 genes were found differently expressed in reverse direction change, 7 genes were found differently expressed in same direction change. The genes altered were mainly related to material metabolism, immunity and inflammatory reaction, signal transduction, translation, transcription, et al. The expressions of genes tested by RT-PCR were in accordance with those detected by cDNA microarray. Conclusion： A. mongholicus may play protective roles in diabetic nephropathy through multiple pathways at gene level. The effect of A. mongholicus in genes related to material metabolism is more significant.