Fig 2. SA and SB effectively prevented UVB-produced ROS in HaCaT cells.

HaCaT cells were treated with 100 μM SA or SB for 24 h, followed by exposure to 30 mJ/cm² of UVB. The levels of ROS were measured by the DCFH-DA assay. (A) Representative laser scanning confocal microscopy images, 400 × magnification. (B) Quantification of the fluorescence intensities of the images in panel A. #P < 0.05 was considered as a significant difference compared with the control group. *P < 0.05 was considered as a significant difference compared with the only UVB-irradiated group.