Dandelion Extracts Protect Human Skin Fibroblasts from UVB Damage and Cellular Senescence

Figure 2

Dandelion leaf and flower extracts protect HDFs from UVB irradiation-induced damage. Dandelion extracts at the indicated concentrations were added 30 minutes before UVB (200 mJ/cm²) (b) or promptly after UVB radiation (c). Cell viability was measured by MTT 24 hours after culture. ^# versus control; ^* versus UVB only. Images in (a) were taken under microscope showing UVB irradiation damages cells, but dandelion leaf and flower extracts (300 μg/mL) protected the cells added from either before or after UVB radiation. Under UVB irradiation, the cells became smaller and less in number. Scale bar: 20 μm. .

(a)

(b)

(c)