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Effects of AA on Snail, E-cadherin, N-cadherin and vimentin expression levels in TGF-β1-treated A549 cells, as assessed by reverse transcription-quantitative polymerase chain reaction. *P<0.05. AA, asiatic acid; GSK-3β, glycogen synthase kinase-3β; Snail, snail family transcriptional repressor; TGF-β1, transforming growth factor-β1.
