Ginsenoside Rg1 inhibit transdifferentiation in rat renal tubular epethelial cells induced by TGF-β1 Mechanism of tanshinone ⅡA in inhibiting transformation of aortic valvular myofibroblast to osteoblast-like phenotype Effect of salvianolic acid B on generation and activation of myofibroblast in rat with renal interstitial fibrosis