Research Article
Antiphotoaging Effects of 3,5-Dicaffeoyl-epi-quinic Acid via Inhibition of Matrix Metalloproteinases in UVB-Irradiated Human Keratinocytes
Figure 3
Effect of DCEQA on the secretion levels of MMP-1, MMP-2, MMP-9, and type Iα1 procollagen. Cells were treated with DCEQA at the indicated concentrations for 24 h following UVB irradiation (15 mJ/cm2). Released protein amounts from conditioned HaCaT cell culture medium were quantified by an ELISA kit. Values are mean ± SD of three independent experiments run in triplicate. a-eMeans with different letters are significantly different at level.
(a) |
(b) |
(c) |
(d) |