AUTHORS : Bernerd F. Lelièvre D Thillou F



2024 Journal of Photochemistry and Photobiology
EPISKIN, Lyon, France - La Roche-Posay Laboratoire Dermatologique, France - L'Oréal Research and Innovation, France

Use of reconstructed skin model to assess the photoprotection afforded by three sunscreen products having different SPF values against DNA lesions and cellular alterations

Both UVB and UVA rays induce biological damages in the epidermis and the dermis that contribute to photo-carcinogenesis and photoaging. In the present study, the photoprotective effect of 2 ISO standard sunscreens, P3 (Sun Protection Factor [SPF]15) and P6 (SPF40) and of an SPF50+ labeled commercial sunscreen product was tested in reconstructed skin tissues exposed to increasing doses of UV Solar Simulated Radiation (UV-SSR). UV-induced damages were evaluated using several biological markers, including DNA lesions in the presence or absence of sunscreen protection.