[1]Department of Endocrinology Chongqing Red Cross Society Hospital(Jiangbei people’s Hospital) Chongqing 400020 China;
[2]Department of Endocrinology Chongqing Ninth People’s Hospital Chongqing 400070 China;
α-lipoic acid; Diabetic nephropathy; Oxidative stress; Vascular endothelium function; Renal function;