FIG. 3.

Increased expression of growth factors following UVB preconditioning (gray bars; control, black bars: UVB treatment). (A) Growth factor chip array analysis showed that the protein expression of bFGF, KGF, HGF, and VEGF in ASCs was significantly induced by UVB treatment. (B) In addition, mRNA expression of these proteins was upregulated, as assessed by RT-PCR. Relative band densities revealed significant differences between control and UVB-treated cells. **P<0.01. bFGF, basic fibroblast growth factor; KGF, keratinocyte growth factor; RT-PCR, reverse transcription–polymerase chain reaction.