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miR-21 affects the TGF-β1-induced differentiation of LR-MSCs into myofibroblasts by regulating PTEN expression. A–C The mRNA and protein expression levels of myofibroblast markers (α-SMA, type I collagen, and Vimentin) in LR-MSCs with or without PTEN silencing, combined with or without treatment with TGF-β1 and miR-21 inhibitor. β-Actin was used as a reference gene. Scale bars = 20 μm, **P < 0.01
