BACKGROUND: Epithelial-mesenchymal transition of tubular cells is a widely recognized mechanism that sustains interstitial fibrosis in diabetic nephropathy (DN). The signaling of FGF-2, a growth factor involved in this mechanism, is regulated by glycosaminoglycans. Heparanase-1, an endoglycosidase that cleaves heparan sulfate, is implicated in the pathogenesis of diabetic nephropathy and is necessary to FGF-2 for the induction of tubular cells transition. Well known Heparanase-1 inhibitors are heparin(s) and sulodexide, a low-molecular weight heparin -- dermatan sulphate blend, which is effective in the treatment of DN.METHODS:We have investigated the inhibition by sulodexide and its components of Heparanase-1 buy an ELISA assay. We and have analyzed its effect on the epithelial-mesenchymal transition of tubular cells by real time gene expression analysis, zymography and migration assay.RESULTS:Results show that sulodexide is an effective heparanase-1 inhibitor, exclusively in virtue to the heparin component, with an IC50 of 5 mug/ml. In FGF-2 treated tubular cells, Sulodexide also prevents the over-expression of the mesenchymal markers alphaSMA, vimentin and fibronectin and the motility increase, i.e. the epithelial-mesenchymal transition of tubular cells. Moreover, sulodexide prevents FGF-2 induced heparanase-1 and MMP9 increase switching off the autocrine loop that FGF-2 activates to support its signal.CONCLUSIONS:The findings highlight the capacity of sulodexide to inhibit heparanase-1 and to control tubular fibrosis triggered by epithelial-mesenchymal transition. In conclusion, these sulodexide activities support the value of this agent in controlling the progression of nephropathy to renal failure.

A new mechanism of action of sulodexide in diabetic nephropathy: inhibits heparanase-1 and prevents FIG-2-induced renal epithelial-mesenchymal transition.

MASOLA, Valentina;Zaza, Gianluigi;LUPO, Antonio;Gambaro G.
2012

Abstract

BACKGROUND: Epithelial-mesenchymal transition of tubular cells is a widely recognized mechanism that sustains interstitial fibrosis in diabetic nephropathy (DN). The signaling of FGF-2, a growth factor involved in this mechanism, is regulated by glycosaminoglycans. Heparanase-1, an endoglycosidase that cleaves heparan sulfate, is implicated in the pathogenesis of diabetic nephropathy and is necessary to FGF-2 for the induction of tubular cells transition. Well known Heparanase-1 inhibitors are heparin(s) and sulodexide, a low-molecular weight heparin -- dermatan sulphate blend, which is effective in the treatment of DN.METHODS:We have investigated the inhibition by sulodexide and its components of Heparanase-1 buy an ELISA assay. We and have analyzed its effect on the epithelial-mesenchymal transition of tubular cells by real time gene expression analysis, zymography and migration assay.RESULTS:Results show that sulodexide is an effective heparanase-1 inhibitor, exclusively in virtue to the heparin component, with an IC50 of 5 mug/ml. In FGF-2 treated tubular cells, Sulodexide also prevents the over-expression of the mesenchymal markers alphaSMA, vimentin and fibronectin and the motility increase, i.e. the epithelial-mesenchymal transition of tubular cells. Moreover, sulodexide prevents FGF-2 induced heparanase-1 and MMP9 increase switching off the autocrine loop that FGF-2 activates to support its signal.CONCLUSIONS:The findings highlight the capacity of sulodexide to inhibit heparanase-1 and to control tubular fibrosis triggered by epithelial-mesenchymal transition. In conclusion, these sulodexide activities support the value of this agent in controlling the progression of nephropathy to renal failure.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11562/472416
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