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H19 promotes MCF-7/tamoxifen-resistant cell epithelial-mesenchymal transition via regulating Snail. Cells were transfected with H19-epv or siRNAH19 for 24 h. Snail (A) protein and (B) mRNA expression levels were measured via western blotting and reverse transcription-quantitative PCR, respectively. **P<0.05 vs. siRNAH19-NC, ##P<0.05 vs. H19-epv-NC. NC, negative control; epv, expression vector; siRNA, small interfering RNA.
