Abstract
Forty-five male SD rats were divided into normal group, diabetic control group, and rosiglitazone treatment diabetic group.By the end of 12 weeks, the expressions of pigment epithelium-derived factor(PEDF), matrix metalloproteinase-2 (MMP-2), and transforming growth factor-β1 (TGF-β1) in the kidney were determined by immunohistochemistry and RT-PCR.The results showed that rosiglitazone decreased the increased kidney weight/body weight ratio, serum creatinine, blood ureanitrogen, urinary albumin excretion, triglyceride levels in diabetic rats (all P＜0.01).Rosiglitazone prevented the decreasing of protein expressions of PEDF and MMP-2 and the increasing of protein expression of TGF-β1 (all P＜0.01).PEDF mRNA showed a similar change,suggesting that renoprotection of rosiglitazone on diabetic rats may be mediated through regulating the expressions of PEDF, MMP-2, and TGF-β1. Key words: Diabetic nephropathies; Pigment epithelium-derived factor; Matrix-metalloproteinase-2; Transforming growth factor-β1; Rosiglitazone
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