Figure 4.

Capacity of DHCA to decrease antioxidant defense depletion induced by UVB. L929 cells were treated with 35 μM DHCA for 1 h, irradiated with UVB (600 mJ/cm²), and after 24 h, CAT (a) and SOD (b) activities and GSH levels (c) were evaluated by H₂O₂ consumption at 240 nm, pyrogallol oxidation and ο-phthalaldehyde assays, respectively. Each column represents the mean ± SD (n = 3). ^###p < 0.001 and ^##p < 0.01: significantly different from nonirradiated and nontreated cells (NC); ^∗p < 0.05 and ^∗∗∗p < 0.001: significantly different from irradiated and nontreated cells (UVB).