Ultraviolet protection

Ultraviolet (UV) protection refers to the biological and pharmacological processes used to safeguard the skin and eyes from the harmful effects of ultraviolet radiation (UVA and UVB). It is not a single molecular target but rather a multi-faceted physiological outcome involving exogenous physical/chemical barriers and endogenous cellular responses. In the skin, endogenous protection is primarily mediated by the production of melanin via the Melanocortin 1 receptor (MC1R) signaling pathway and the activation of nucleotide excision repair (NER) mechanisms to fix DNA lesions like cyclobutane pyrimidine dimers (CPDs). Chronic failure of UV protection leads to significant morbidity, including DNA mutations that drive melanoma and non-melanoma skin cancers, as well as the degradation of the extracellular matrix leading to photoaging. Therapeutic interventions include topical sunscreens that act as sacrificial absorbers or reflectors, and systemic agents like afamelanotide that induce protective tanning. For biotech analysts, UV protection should be viewed as a therapeutic category comprising DNA repair enzymes, antioxidants, and pigment-inducing agents rather than a distinct receptor or enzyme target.

Other names

PhotoprotectionSun protectionUV shieldingUltraviolet radiation protection

UV protection is achieved through the physical reflection or chemical absorption of UV radiation by exogenous filters, and the biological stimulation of endogenous pigments like melanin and DNA repair pathways to prevent and correct cellular damage.