Journal
PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE
Volume 16, Issue 5, Pages 195-201Publisher
MUNKSGAARD INT PUBL LTD
DOI: 10.1034/j.1600-0781.2000.160501.x
Keywords
UVB; sunburn cells; apoptosis; death receptors; DNA damage
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Sunburn cells, single standing cells with typical morphologic features occurring in UV-exposed skin, have been recognized as keratinocytes undergoing apoptosis following UV irradiation, Induction of apoptosis following UV exposure appears to be a protective mechanism, getting rid off severely damaged cells that bear the risk of malignant transformation. UV-mediated apoptosis is a highly complex process in which different molecular pathways are involved. These include DNA damage, activation of the tumor suppressor gene p53, triggering of cell death receptors either directly by UV or by autocrine release of death ligands, mitochondrial damage and cytochrome C release. Detailed knowledge about the interplay between these pathways will increase our understanding of photocarcinogenesis. This review briefly discusses recent findings concerning the molecular mechanisms underlying UV-induced apoptosis.
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