AIM: To observe the effect of plumbagin on the mRNA and protein expression of nicotinamide adenine dinucleotidephosphate oxidase 4( Nox4),reactive oxygen species( ROS) level and protein expression of α-smooth muscle actin( α-SMA) in the HSC-LX2 cells stimulated with transforming growth factor β1( TGF-β1) in vitro. METHODS: HSC-LX2 cells were cultured in vitro and divided into blank group,model group,high-,medium- and low-dose( 2,1. 5 and 1 μmol / L) plumbagin groups. After incubated with each drug for 72 h,...