Journal
FRONTIERS IN IMMUNOLOGY
Volume 12, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2021.694086
Keywords
immunosuppression; sunlight; phototherapy; T cells; B cells; T regulatory cells; natural killer cells; dendritic cells
Categories
Funding
- MS Western Australia
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Skin and circulating cells have constant communication, with exposure to sunlight leading to changes in circulating blood cells' number, phenotype, and function. Data from human studies show immune modulations induced by UV radiation exposure, highlighting the therapeutic effects of UVR beyond the skin and the influence of sunlight exposure on human health.
Cells of the skin and circulation are in constant two-way communication. Following exposure of humans to sunlight or to phototherapy, there are alterations in the number, phenotype and function of circulating blood cells. In this review, only data obtained from human studies are considered, with changes induced by UV radiation (UVR) exposure described for phagocytic leukocytes and peripheral blood mononuclear cells plus their component T and B cells, natural killer cells and dendritic cells. These immune modulations illustrate the potential of UVR to have therapeutic effects beyond the skin, and that sunlight exposure is an important environmental influence on human health.
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