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Critical role of serum response factor in podocyte epithelial-mesenchymal transition of diabetic nephropathy. | LitMetric

Purpose: To investigate the expression and function of serum response factor in podocyte epithelial-mesenchymal transition of diabetic nephropathy.

Methods: The expression of serum response factor, epithelial markers and mesenchymal markers was examined in podocytes or renal cortex tissues following high glucose. Serum response factor was upregulated by its plasmids and downregulated by CCG-1423 to investigate how it influenced podocyte epithelial-mesenchymal transition in diabetic nephropathy. Streptozotocin was used to generate diabetes mellitus in rats.

Results: In podocytes after high glucose treatment, serum response factor and mesenchymal markers increased, while epithelial markers declined. Similar changes were observed in vivo. Serum response factor overexpression in podocytes induced expression of Snail, an important transcription factor mediating epithelial-mesenchymal transition. Blockade of serum response factor reduced Snail induction, protected podocytes from epithelial-mesenchymal transition and ameliorated proteinuria.

Conclusion: Together, increased serum response factor activity provokes podocytes' epithelial-mesenchymal transition and dysfunction in diabetic nephropathy. Targeting serum response factor by small-molecule inhibitor may be an attractive therapeutic strategy for diabetic nephropathy.

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http://dx.doi.org/10.1177/1479164115588545DOI Listing

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