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Protective effect of DK against UVB-induced damage in HDF cells. (A) Intracellular ROS scavenging effect of DK in UVB-irradiated HDF cells, and (B) protective effect of DK on UVB-induced cell death in HDF cells. Cell viability was measured by MTT assay and intracellular ROS level was measured by DCF-DA assay. The data were expressed as the mean ± SE (n = 3). * p < 0.05, ** p < 0.01 as compared to the UVB-irradiated group, and ## p < 0.01 as compared to the control group.
