Effects of IFN and NAC on cell viability of HepG2 cells with p65 knock down. HepG2 cells were treated 24 h after siRNA duplexes transfection with IFN 2.5x104 U/mL and/or NAC 10 mM, and cell viability was determined after 24 hours of treatment. Values are shown as means and standard error of media (SEM). a- COsiRNA+NAC x COsiRNA x siRNAp65 p<0.01. b- siRNAp65 x COsiRNA x siRNAp65+IFN p<0.05. c- siRNAp65+IFN x COsiRNA x COsiRNA +NAC x siRNAp65 x siRNAp65+NAC (10 and 20 mM) p<0.05.