Photoprotective Effects of a SPF50+ Sunscreen on Skin Genotoxicity Induced by Repeated Chronic Outdoor Sun Exposure

Between 2 and 3 million non-melanoma skin cancers and 132,000 melanoma skin cancers occur globally each year. Sun protection continues to be a major public health issue and has always been a priority research area for Pierre Fabre laboratories. The involvement of ultraviolet radiation of the solar spectrum in skin carcinogenesis is well known, through its ability to damage the DNA of skin cells and the induction of oxidative processes. The aim of this exploratory study is to perform the quantification of: * DNA photoproducts excised from the genome by the biological repair systems in urine samples * cellular DNA damage in the epidermis following chronic exposure to natural sunlight. This study will allow us to better understand and quantify the benefit of sunscreens on photoinduced cellular damage and their elimination in urine.