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Dandelion leaf and flower extracts inhibit UVB irradiation-stimulated MMP activity. UVB irradiation strengthened the fluorescent intensity of DQ gelatin, reflecting higher MMP activity; however, dandelion leaf and flower extracts (300 μg/mL) significantly decreased MMP activity when added both before and after UVB irradiation. Scale bar: 20 μm. (b) was the statistical analysis from (a) by imageJ software. # P < 0.05 versus control; * P < 0.05 versus UVB only. n = 3. Scale bar: 20 μm.
