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The effect of MC1R variants and sunscreen on the response of human melanocytes in vivo to ultraviolet radiation and implications for melanoma
Journal article   Peer reviewed

The effect of MC1R variants and sunscreen on the response of human melanocytes in vivo to ultraviolet radiation and implications for melanoma

E Hacker, Z Boyce, Michael G Kimlin, L Wockner, T Pollak, S A Vaartjes, N K Hayward and D C Whiteman
Pigment Cell & Melanoma Research, Vol.26(6), pp.835-844
2013
url
https://doi.org/10.1111/pcmr.12157View
Published Version

Abstract

MC1R melanocytes sun exposure melanoma proliferation
Summary: We conducted a clinical trial to compare the molecular and cellular responses of human melanocytes and keratinocytes in vivo to solar-simulated ultraviolet radiation (SSUVR) in 57 Caucasian participants grouped according to MC1R genotype. We found that, on average, the density of epidermal melanocytes 14 days after exposure to 2 minimal erythemal dose (MED) SSUVR was twofold higher than baseline (unirradiated) skin. However, the change in epidermal melanocyte counts among people carrying germline MC1R variants (97% increase) was significantly less than those with wild-type MC1R (164% increase; P = 0.01). We also found that sunscreen applied to the skin before exposure to 2 MED SSUVR completely blocked the effects of DNA damage, p53 induction, and cellular proliferation in both melanocytes and keratinocytes. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

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Cell Biology
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