Figure 6.

Cocoa treatment modulated antioxidant enzymes in senescence auditory cells. (A) SOD, (B) CAT, and (C) GPx activities were measured by a colorimetric assay in cell lysates of HEI-OC1, OC-k3, and SV-k1 cells post-treatments. Experimental groups: CTR group (0, 0.5 and 5 μg/mL of CPE for 20 h) and H₂O₂ group (induced cellular senescence with 100 µM for 1 h in all groups: 0, 0.5 and 5 μg/mL of CPE for 20 h). The values represent the mean ± SD of Units/mL (U/mL) (A) and (nmol/min/mL) (B,C) in triplicate. * p < 0.05 vs. CTR group; # p < 0.05 vs. H₂O₂ group (n = 4).