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

作者：Wen Kuo Ching; Fan Pei Ching; Tsai Shang Yuan; Shih I Chen; Chiang Hsiu Mei^*

来源：Evidence-Based Complementary and Alternative Medicine, 2012, 417346.

DOI：10.1155/2012/417346

Ixora parviflora with high polyphenol content exhibited antioxidant activity and reducing UVB-induced intracellular reactive oxygen species production. In this study, results of the photoaging screening experiments revealed that IPE at 1000 mu g/mL reduced the activity of bacterial collagenase by 92.7 +/- 4.2% and reduced the activity of elastase by 32.6 +/- 1.4%. Therefore, we investigated the mechanisms by which IPE exerts its anti-photoaging activity. IPE at 1 mu g/mL led to an increase in type I procollagen expression and increased total collagen synthesis in fibroblasts at 5 mu g/mL. We found that IPE inhibited MMP-1, MMP-3, and MMP-9 expression at doses of 1, 5, and 10 mu g/mL, respectively, in fibroblasts exposed to UV irradiation (40 mJ/cm(2)). Gelatin zymography assay showed that IPE at 50 mu g/mL inhibited MMP-9 secretion/activity in cultured fibroblasts after UVB exposure. In addition, IPE inhibited the phosphorylation of p38, ERK, and JNK induced by UVB. Furthermore, IPE inhibited the UVB-induced expression of Smad7. In addition, IPE at 1 mu g/mL inhibited NO production and COX-2 expression in UV-exposed fibroblasts. These findings show that IPE exhibits anti-inflammatory and anti-photoaging activities, indicating that IPE could be a potential anti-aging agent.

• 出版日期2012
• 单位中国医科大学