Figure 6.

Cell viability and IL-8 concentration measured on GTL-16 and Caco-2 cells maintained for equal time (3 h plus 3 h; 24 h plus 24 h) without iron treatments. In (a) and (b) cell viability, measured by MTT assay, and in (c) and (d) IL-8 concentration, measured by ELISA kit, on both cell types are reported. Data are expressed as means ± SD (% vs. control) of four independent experiments for each cell type. * p < 0.05 vs. control; ** p < 0.05 vs. correspondent column at different time; bars p < 0.05 among different treatments at the same time.