[Preliminary study on effects of sodium ferulate in treating diabetic nephropathy]

To investigate the effects and mechanisms of sodium ferutate (SF) in treating diabetic nephropathy (DN).

Eighty patients of diabetes mellitus type 2 with DN were randomly divided into two groups, 40 cases in each group. The routine group treated with conventional treatment including dietary therapy and hypodermic injection of insulin, and the SF group treated with intravenous dripping of SF 300 mg/d additionally besides the conventional therapy, the therapeutic course for both groups was 4 weeks. And 40 healthy volunteers were allocated in a group for normal control. Before and after therapy, levels of fasting blood glucose (FBG), hemoglobin A1c(HbA1c), triglyceride (TG), total cholesterol (TC), high-density lipoprotein (HDL-C), serum creatinine (SCr), blood urea nitrogen (BUN), mean arterial pressure (MAP), urinary albumin excretion rate (UAER), serum collagen type IV (CIV) and endothelin (ET) were detected.

After 4 weeks of treatment, FBG and HbA1c reduced obviously in both groups with insignificant difference in comparison of them (P > 0.05). Before treatment, TG, TC, MAP, SCr, BUN, UAER, CIV and ET were markedly higher in DN patients than those in the health control (P < 0.05), these criteria decreased significantly in the SF group (P < 0.05) but insignificantly in the routine group (P > 0.05) after treatment, showing difference between the two groups (P < 0.05).

Sodium ferulate could ameliorate lipid metabolic disorder, reduce blood pressure, lower UAER and CIV level, and improve renal function in DN patients, the mechanism might be through decreasing ET production and inhibiting the combining of ET with its receptor.