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(A) mRNA and (B) protein expression of TGF-β1 in fibroblasts prior to and after silencing of TGF-β1. Reverse-transcription quantitative polymerase chain reaction was used to determine the expression of mRNA and western blotting was employed to measure protein expression. *P<0.05; **P<0.01 compared with NC. TGF, transforming growth factor; NC, negative control transfected with scrambled control siRNA; siRNA, small interfering RNA; TGF, transforming growth factor.
