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Deprecated: Implicit conversion from float 286.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Biochem+J 2011 ; 437 (3): 515-20 Nephropedia Template TP
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Transforming Growth Factor-?2 promotes Snail-mediated endothelial-mesenchymal transition through convergence of Smad-dependent and Smad-independent signaling #MMPMID21585337
Medici D; Potenta S; Kalluri R
Biochem J 2011[Aug]; 437 (3): 515-20 PMID21585337show ga
Endothelial-mesenchymal transition (EndMT) is a critical process of cardiac development and disease progression. However, little is know about the signaling mechanisms that cause endothelial cells to transform into mesenchymal cells. Here we show that transforming growth factor-beta2 (TGF-?2) stimulates EndMT through Smad, MEK, PI3K, and p38 MAPK signaling pathways. Inhibitors of these pathways prevent TGF-?2-induced EndMT. Furthermore, we show that all of these pathways are essential for increasing expression of the cell adhesion suppressing transcription factor Snail. Inhibition of Snail with siRNA prevents TGF-?2-induced EndMT. However, over-expression of Snail is not sufficient to cause EndMT. Chemical inhibition of GSK-3? allows EndMT to be induced by Snail over-expression. Expression of a mutant Snail protein that is resistant to GSK-3?-dependent inactivation also promotes EndMT. These data provide the foundation for understanding the roles of specific signaling pathways in mediating EndMT.