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The fibronectin protein expression of cardiac fibroblasts in different groups determined using Western blot. 1, Control; 2, 5 ng/mL transforming growth factor beta 1 (TGFβ1) stimulation for 6 h; 3, 5 ng/mL TGFβ1 stimulation for 24 h; 4, 10−6 mol/L tanshinone (TSN) pretreatment + 5 ng/mL TGFβ1 stimulation; 5, 10−5 mol/L TSN pretreatment + 5 ng/mL TGFβ1 stimulation; 6, 10−4 mol/L TSN pretreatment + 5 ng/mL TGFβ1 stimulation
