Ixora parviflora Protects against UVB-Induced Photoaging by Inhibiting the Expression of MMPs, MAP Kinases, and COX-2 and by Promoting Type I Procollagen Synthesis

Figure 4

Effect of Ixora parviflora extract on the UV-induced type I procollagen expression in human fibroblasts (a) and total collagen synthesis (b). IPE will upregulate type I procollagen expression and synthesis in a dose-dependent manner. (𝑛=4; significant difference versus control (non-UV-exposed): ^∗∗∗𝑃<0.001. Significant inhibition versus UV-exposed group: ^#𝑃<0.05; ^##𝑃<0.01; ^###𝑃<0.001. EGCG: (−)-epigallocatechin gallate.).

(a)

(b)