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Abstract
The range of diagnostic and therapeutic applications of ultraviolet A (UVA) radiation has been continuously expanding. UVA radiation is a well-known mutagenic factor capable of damaging both cells and tissues. At the same time there is a very limited information on long-term consequences of irradiating the skin with different doses of UVA and long-wavelength ultraviolet B (UVB) radiation used in therapies of skin disorders. It was demonstrated that for UVA doses of 0.1 to 1000 mJ/cm2 the sensitivity of the porcine skin to the UVA-induced breaking of nuclear DNA is similar to that of the human skin. Results indicate that porcine skin may serve as a model system for population studies of the deleterious effects of UVA irradiation of the skin cells.