| Title |
The effect of MC1R variants and sunscreen on the response of human melanocytes in vivo to ultraviolet radiation and implications for melanoma
|
|---|---|
| Published in |
Pigment Cell & Melanoma Research, September 2013
|
| DOI | 10.1111/pcmr.12157 |
| Pubmed ID | |
| Authors |
Elke Hacker, Zachary Boyce, Michael G. Kimlin, Leesa Wockner, Thomas Pollak, Sam A. Vaartjes, Nicholas K. Hayward, David C. Whiteman |
| Abstract |
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. |
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X Demographics
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Australia | 4 | 50% |
| Mexico | 1 | 13% |
| France | 1 | 13% |
| United States | 1 | 13% |
| Unknown | 1 | 13% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 6 | 75% |
| Scientists | 1 | 13% |
| Practitioners (doctors, other healthcare professionals) | 1 | 13% |
Mendeley readers
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Ireland | 1 | 3% |
| Switzerland | 1 | 3% |
| Unknown | 30 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 6 | 19% |
| Student > Master | 5 | 16% |
| Student > Bachelor | 4 | 13% |
| Student > Doctoral Student | 2 | 6% |
| Professor | 2 | 6% |
| Other | 4 | 13% |
| Unknown | 9 | 28% |
| Readers by discipline | Count | As % |
|---|---|---|
| Biochemistry, Genetics and Molecular Biology | 8 | 25% |
| Medicine and Dentistry | 8 | 25% |
| Agricultural and Biological Sciences | 5 | 16% |
| Mathematics | 1 | 3% |
| Nursing and Health Professions | 1 | 3% |
| Other | 1 | 3% |
| Unknown | 8 | 25% |