Figure 7.

Protecting effect of quercetin (a), quer-3-LA (b) and quer-7-ALA (c) against photo-oxidized A2E, represented as cell viability (%) in function of the used drug concentration (µM) i.e., cells exposed to A2E and non-treated. Results are expressed in mean ± SD and are from at least n = 3 independent experiments. Results are normalized with 100% viability for non-treated and non-exposed to A2E toxicity control cells. ¹ Concentration of lipophenol needed to inhibit 50% of the toxicity induced by photo-oxidized A2E. Mann-Whitney’s test, # p < 0.05, ## p < 0.01, ### p < 0.001, versus natural quercetin. Mann-Whitney’s test, * p < 0.05, ** p < 0.01, *** p < 0.001, versus non-treated cells exposed to photo-oxidized A2E.