TY - JOUR AU - Fisher, G J; Voorhees, J J TI - Molecular mechanisms of photoaging and its prevention by retinoic acid: ultraviolet irradiation induces MAP kinase signal transduction cascades that induce Ap-1-regulated matrix metalloproteinases that degrade human skin in vivo JO - J Investig Dermatol Symp Proc VL - 3 PY - 1998 L3 - PubMed-ID: 9732061 SP - 61 EP - 68 ER -