Figure 2: Time course of TiO2 NPs incubated with HepG2 cells transfected with BTG2 promoter-reporter plasmid. Scattergram of lg-logistic growth curve plot of BTG2 response (fold induction) of HepG2 cells transfected with BTG2 promoter-luciferase reporter plasmid exposed to 10 μg/mL TiO2 NPs for various lengths of time. Each plot was produced from at least 3 times replicated measurements. All values are presented as mean ± s.d. (n ≥ 3). Data were statistically analyzed with the Student’s t test (*p<0.05).