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SIRT1 knockdown regulates epithelial-mesenchymal transition-associated markers of A549 cells. E-cadherin, vimentin and N-cadherin expression in siSIRT1 and siControl A549 cells were determined by western blot analysis. GAPDH was used as the loading control, and data are representative of three independent experiments. SIRT1, Sirtuin 1; si, small interfering RNA.
