Figure 3.

The effect of the pre-treatment of cells with lipophilic antioxidants vitamin E and/or zeaxanthin on the viability of ARPE-19 cells after 1 h exposure to visible light in the presence of liposomes containing 0.5 mM ATR. Cell viability was measured by MTT assay 24 h after the exposure. The symbols represent viability of cells in independent experiments, the heights of the bars indicate the means, while the error bars indicate SDs (N = 96 for experiments with no antioxidants (NoAntiox); N = 48 for experiments on cells supplemented with zeaxanthin (Zea) or α-tocopherol (TOH), N = 66 for experiments on cells supplemented with both zeaxanthin and α-tocopherol (Zea + TOH)).