Fig. 1

Cell viability and ROS production of HGFs treated with Premier® or Premier® + NAC. a HGFs viability in XTT assay after incubation with the eluates of Premier®, Premier® + NAC(0.1 wt.%)and Premier® + NAC(1 wt.%)for 24 h. Control cells received medium only, positive control cells were treated with 1% Triton X-100. Data are expressed as percentage of control (Eq. (1)) and represent mean ± SD (n = 3); ^∗∗ p < 0.01; ^∗∗∗ p < 0.001 (b) Intracellular ROS level evaluated by flow cytometry after a 24 h exposure period. Data represent mean ± SD (n = 3); ^∗ p < 0.05; ^∗∗ p < 0.01