Figure 4.

SOD activities of HDFs treated with P. betle, C. vulgaris and TRF. Blue, red, green and violet bars represent control, P. betle, C. vulgaris, and TRF treatments, respectively. ^ap < 0.05 compared to young HDFs, ^bp < 0.05 compared to P. betle-treated young HDFs, ^cp < 0.05 compared to C. vulgaris-treated young HDFs, ^dp < 0.05 compared to TRF-treated young HDFs, ^ep < 0.05 compared to pre-senescent HDFs, ^fp < 0.05 compared to P. betle-treated pre-senescent HDFs, ^gp < 0.05 compared to C. vulgaris-treated pre-senescent HDFs, ^hp < 0.05 compared to TRF-treated pre-senescent HDFs, ⁱp < 0.05 compared to senescent HDFs. Data are presented as mean ± SEM, n = 6.