title: A new hair follicle-derived human epidermal model for the evaluation of sunscreen genoprotection.
abstract: Induction of skin cancer is the most deleterious effect of excessive exposure to sunlight. Accurate evaluation of sunscreens to protect the genome is thus of major importance. In particular, the ability of suncare products to prevent the formation of DNA damage should be evaluated more directly since the Sun Protection Factor is only related to erythema induction. For this purpose, we developed an in vitro approach using a recently characterized reconstituted human epidermis (RHE) model engineered from hair follicle. The relevance of this skin substitute in terms of UV-induced genotoxicity was compared to ex vivo explants exposed to solar-simulated radiation (SSR). The yield of bipyrimidine photoproducts, their rate of repair, and the induction of apoptosis were very similar in both types of skin samples. In order to evaluate the protection afforded by sunscreen against DNA damage, bipyrimidine photoproducts were quantified in tissue models following SSR exposure in the presence or absence of a SPF50+ formula. A rather high DNA protection factor of approximately 20 was found in RHE, very similar to that determined for explants. Thus, RHE is a good surrogate to human skin, and also a convenient and useful tool for investigation of the genoprotection of sunscreens.
authors.affiliation: Service de Pharmacologie et Pharmacocinétique cutanée, Centre R&D Pierre Fabre, Toulouse, France. Electronic address: daniel.bacqueville@pierre-fabre.com.
authors.forename: D
authors.initials: D
authors.lastname: Bacqueville
authors.affiliation: Univ. Grenoble Alpes, INAC, LCIB, LAN, F-38000 Grenoble, France; CEA, INAC, SCIB, LAN, F-38000 Grenoble, France.
authors.forename: T
authors.initials: T
authors.lastname: Douki
authors.affiliation: Service de Pharmacologie et Pharmacocinétique cutanée, Centre R&D Pierre Fabre, Toulouse, France.
authors.forename: L
authors.initials: L
authors.lastname: Duprat
authors.affiliation: Univ. Grenoble Alpes, INAC, LCIB, LAN, F-38000 Grenoble, France; CEA, INAC, SCIB, LAN, F-38000 Grenoble, France.
authors.forename: S
authors.initials: S
authors.lastname: Rebelo-Moreira
authors.affiliation: Service de Pharmacologie et Pharmacocinétique cutanée, Centre R&D Pierre Fabre, Toulouse, France.
authors.forename: B
authors.initials: B
authors.lastname: Guiraud
authors.affiliation: Service de Pharmacologie et Pharmacocinétique cutanée, Centre R&D Pierre Fabre, Toulouse, France.
authors.forename: H
authors.initials: H
authors.lastname: Dromigny
authors.affiliation: Service de Pharmacologie et Pharmacocinétique cutanée, Centre R&D Pierre Fabre, Toulouse, France.
authors.forename: V
authors.initials: V
authors.lastname: Perier
authors.affiliation: Service de Pharmacologie et Pharmacocinétique cutanée, Centre R&D Pierre Fabre, Toulouse, France.
authors.forename: S
authors.initials: S
authors.lastname: Bessou-Touya
authors.affiliation: Service de Pharmacologie et Pharmacocinétique cutanée, Centre R&D Pierre Fabre, Toulouse, France.
authors.forename: H
authors.initials: H
authors.lastname: Duplan
mesh_terms: D000328:Adult; D017209:Apoptosis / Q000187:drug effects; D053148:Caspase 3 / Q000378:metabolism; D004260:DNA Repair / Q000187:drug effects; D004353:Drug Evaluation, Preclinical / Q000379:methods*; D004817:Epidermis; D005260:Female; D018859:Hair Follicle / Q000166:cytology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009152:Mutagenicity Tests; D011740:Pyrimidine Dimers / Q000378:metabolism; D015203:Reproducibility of Results; D012867:Skin / Q000187:drug effects; D013472:Sunlight / Q000009:adverse effects; D013473:Sunscreening Agents / Q000494:pharmacology* / Q000633:toxicity
chemical_list: D011740:Pyrimidine Dimers; D013473:Sunscreening Agents; D053148:Caspase 3
keywords: DNA protection factor; Genotoxicity; Reconstructed human epidermis; Solar-simulated radiation; Sunlight; Sunscreen