Effects of Liuwei Dihuang Jiawei Capsula on renal protein kinase C activity and connective tissue growth factor of diabetic nephropathy rats Effect of Xiexin Decoction on early diabetic nephropathy in diabetic rats Protective effects and mechanism of glycosides/phenol component of Moutan Cortex on renal injury of diabetic nephropathy rats Inhibitory mechanism of Ginkgo biloba extract,Captopril,and Vaisartan on kidney fibrosis of diabetic nephropathy rats and their comparison Effect of The Compound of Traditional Chinese Drugs on Gene Expression of Renal Endothelin and Its Receptor of Experimental Diabetic Nephropathy