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Photodermatol Photoimmunol Photomed. 2017 May;33(3):135-142. doi: 10.1111/phpp.12298. Epub 2017 Mar 2.

Prevention of DNA damage in human skin by topical sunscreens.

Author information

1
Population Health Department, QIMR Berghofer Medical Research Institute, Herston, Qld, Australia.
2
School of Public Health, the University of Queensland, Herston, Qld, Australia.
3
Cancer Research UK Manchester Institute and Institute of Inflammation and Repair, University of Manchester, Manchester, UK.

Abstract

BACKGROUND/PURPOSE:

There is strong evidence that topical sunscreens, designed to protect against ultraviolet radiation (UVR)-induced erythema, decrease the amount of UVR to which the skin is exposed, but their effectiveness in reducing UVR-induced DNA damage in vivo has not been well quantified.

METHODS:

We systematically reviewed the published literature (1990-2015) to determine whether sunscreens prevent DNA damage in human skin when applied prior to UVR exposure. We included experimental studies measuring UVR-induced DNA damage in human skin in vivo with and without sunscreens and excluded studies conducted in animal models and cell lines. Eligible studies were identified by computerized search of bibliographic databases, supplemented by hand-searching the reference lists of retrieved articles.

RESULTS:

We identified ten eligible studies. Despite heterogeneity in methodological approaches, including the sun protection factors of the sunscreens assessed, range of skin types examined, the UVR exposure time and dose, the timing of post-irradiation biopsies and in the markers of DNA damage examined, all studies reported markedly reduced (or nil) UVR-induced DNA damage on sunscreen-protected skin.

CONCLUSION:

Our review of the experimental evidence supports a protective effect of topical sunscreens in preventing UVR-induced DNA damage in human skin cells in vivo.

KEYWORDS:

DNA damage; melanoma; sunscreen; ultraviolet

PMID:
28165636
DOI:
10.1111/phpp.12298
[Indexed for MEDLINE]

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