Carcinogenic Effect of Sequential Artificial Sunlight and UV-A Irradiation in Hairless Mice

Authors:
  • BSBent Staberg
    Bent Staberg
  • HWHans Christian Wulf
    Hans Christian Wulf
  • TPThomas Poulsen
    Thomas Poulsen
  • PKPer Klemp
    Per Klemp
  • HBHolger Brodthagen
    Holger Brodthagen

Abstract
• The carcinogenic effect of artificial UV sunlight followed by UV-A irradiation in human solaria doses has been studied with the use of the hairless mouse as an animal model. Artificial sunlight exposure alone induced only a moderate skin tumor incidence (animals with at least one tumor) of 0.15 after one year, and UV-A irradiation alone induced no tumor formation. However, the combination of artificial sunlight exposure and subsequent UV-A irradiation significantly increased the tumor incidence to 0.72. We conclude that, in humans, tanning with UV-A for cosmetic purposes may not be an innocuous procedure. (Arch Dermatol1983;119:641-643)

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