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Expression of Smad4 in hepatic stellate cells treated with TGF-β1 or TGF-β1 and miRNA-122. *P<0.05 vs. TGF-β1 groups or TGF-β1 and negative lentiviral vector groups. (A) Relative mRNA expression of Smad4 in hepatic stellate cells treated with 10 µg TGF-β1. (B) Relative protein expression of Smad4 in hepatic stellate cells.
