Matrix-degrading metalloproteinases in photoaging.
UV radiation from the sun impacts skin health adversely through complex, multiple molecular pathways. Premature skin aging (photoaging) is among the most widely appreciated harmful effects of chronic exposure to solar UV radiation. Extensive damage to the dermal connective tissue is a hallmark of photoaged skin. Disruption of the normal architecture of skin connective tissue impairs skin function and causes it to look aged. UV irradiation induces expression of certain members of the matrix metalloproteinase (MMP) family, which degrade collagen and other extracellular matrix proteins that comprise the dermal connective tissue. Although the critical role of MMPs in photoaging is undeniable, important questions remain. This article summarizes our current understanding of the role of MMPs in the photoaging process and presents new data that (1) describe the expression and regulation by UV irradiation of all members of the MMP family in human skin in vivo and (2) quantify the relative contributions of epidermis and dermis to the expression of UV irradiation-induced MMPs in human skin in vivo.Journal of Investigative Dermatology Symposium Proceedings (2009) 14, 20-24; doi:10.1038/jidsymp.2009.8.
Quan
Taihao
T
Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, USA.
Qin
Zhaoping
Z
Xia
Wei
W
Shao
Yuan
Y
Voorhees
John J
JJ
Fisher
Gary J
GJ
D004817:Epidermis / Q000201:enzymology / Q000528:radiation effects; D015870:Gene Expression / Q000528:radiation effects; D006801:Humans; D020782:Matrix Metalloproteinases / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012867:Skin / Q000201:enzymology / Q000528:radiation effects; D015595:Skin Aging / Q000235:genetics / Q000502:physiology*; D014466:Ultraviolet Rays / Q000009:adverse effects
D012333:RNA, Messenger; D020782:Matrix Metalloproteinases
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