Effect of tetromethylpyrazine and aminoguanidine on expression of vascular endothelial growth factor in kidney of diabetic rats / 中西医结合学报

ABSTRACT

OBJECTIVE: To investigate the therapeutic mechanism of tetromethylpyrazine and aminoguanidine on diabetic nephropathy. METHODS: Diabetic rats were induced by streptozotocin. They were divided into 5 groups: normal control group (group C), untreated diabetic group (group DM), tetromethylpyrazine treated group (group TMP), aminoguanidine treated group (group AG) and tetromethylpyrazine and aminoguanidine treated group (group TMP+AG). The expression of vascular endothelial growth factor (VEGF) in renal cortex of the rats in each group was observed by immunohistochemical staining after 12 weeks. RESULTS: The expression of VEGF in renal cortex of the rats in group TMP+AG and group C was alike. The expression of VEGF in renal cortex of group TMP and group AG decreased significantly as compared with that of group C, but was still above normal level. CONCLUSION: The therapeutic mechanism of tetromethylpyrazine and aminoguanidine on diabetic nephropathy may be inhibiting the over-expression of VEGF in kidney of diabetic rats.