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Western blot detect the protein expression of HIF-1α, TGF-β, MMP-2, Twist, N-cad, E-cad in each group of cells (*p<0.05, **p<0.01, ***p<0.001, ****p<0.0001 compared with Control group; #p<0.05, ##p<0.01, ###p<0.001, ###p<0.0001 compared with shHIF-1α group).
