Fig. 6

Influence of incubation time on the cytotoxic action of hydrogen peroxide in ARPE-19 cells. 50,000 cells were incubated for the indicated time (30, 60 and 120 min) with various concentrations of the peroxide (0.01, 0.05, 0.1, 0.5, 1, 5, 10, 25 mM) in free serum culture medium (a) and with serum (b). Data are means of at least three independent experiments