To invest the effects of all-trans Retinoic Acid(t-RA) on UVA-induced collagen biosynthesis of human normal fibroblasts (FB) and provide experimental evidence for treating photoaged skin.

• 本文探讨全反式维甲酸对UVA诱导人成纤维细胞胶原合成的影响，为应用全反式纤维甲酸治疗光老化皮肤提供实验依据。