Gardenia jasminoides Extract Attenuates the UVB-Induced Expressions of Cytokines in Keratinocytes and Indirectly Inhibits Matrix Metalloproteinase-1 Expression in Human Dermal Fibroblasts
Effects of plant extracts on UVB cytotoxicity in HaCaT cells. In (a), HaCaT cells were irradiated with 5~15 mJ cm−2 UVB. In (b), cells were irradiated with 10 mJ cm−2 UVB in PBS in the absence or presence of plant extracts (10, 30, or 100 μg mL−1). Irradiated cells were subsequently incubated for 24 h and cell viabilities were determined using an MTT assay. Cell viabilities are presented as percentages of the vehicle control (means ± SEs, ). # versus the unirradiated control. * versus the vehicle control irradiated with UVB.