Objective:To investigate the effects of Ligustrazine on renal interstitial fibrosis and its mechanism.Methods:Tirty-two female SD rats were divided into a sham-operated group,a UUO model group,a valsartan treated group and a Ligustrazine treated group.All rats were sacrificed 14 days after UUO.The expression of MMP-9 and TIMP-1 were detected.Results:The expression and distribution of MMP-9 and TIMP-1 were strong in UUO model group.Valsartan and Ligustrazine could decrease the expressions of MMP-9 and TIMP-1.There was no significant differenc...