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Updated: Aug 16, 2026

Studying Chronic Exposure of Mice to Ultraviolet B Radiation
Published on: August 19, 2025
Ultraviolet B radiation-induced immunosuppression: molecular mechanisms and cellular alterations
Nicole Schade1, Charlotte Esser, Jean Krutmann
1Institut für Umweltmedizinische Forschung (IUF), (Institute for Environmental Medical Research at the Heinrich-Heine University Duesseldorf gGmbH), Auf'm Hennekamp 50, 40225 Düsseldorf, Germany.
Abstract:
About 30 years ago, the discovery of the connection between UV radiation and the immune system triggered the field of photoimmunology. In that time, many aspects were studied, and a complex picture emerged. UV absorption results in multi-tiered molecular and cellular UV radiation-induced events, eventually affecting the immune system. The shorter wavelengths of the UV spectrum, i.e. UVB appear to be the most critical players for impairing immune reactions. This review summarizes and discusses UVB radiation-induced effects on the skin, considering the primary efferent molecular events following energy absorption of UVB radiation, ending with the various afferent cellular changes, such as induction of regulatory T cells.
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