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UV-induced immunosuppressive and anti-inflammatory actions: Mechanisms and clinical applications

par Dupont, Etienne ;Ruscas-Craciun, Ligia Ioana
Référence Immunotherapy, 1, 2, page (205-210)
Publication Publié, 2009

Article révisé par les pairs

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Résumé :

The introduction in 1974 of psoralens UVA (PUVA) therapy followed in 1987 by extracorporeal photopheresis (ECP) has launched UV light in medicine field. A significant number of potential mechanisms could be linked to the basic cellular UV action (i.e., DNA damage and subsequent cells apoptosis). Phagocytosis by macrophages and dendritic cells (DCs) leads, through a receptor-mediated process, to their modulation. A state of antigen-specific tolerance is induced by induction of Treg cells, inhibition of DCs, which remain at a an immature state, inhibition of production of the proinflammatory cytokines IL-2, IFN-γ, TNF-α and IL-12, and induction of production of cytokines IL-10, TGF-β and IL-1Ra. Beside cutaneous T-cell lymphoma, use of ECP remains experimental except for graft-versus-host disease, especially the chronic-resistant form. The sparing action of corticosteroids as described in studies on transplantation deserves further attention. © 2009 Future Medicine Ltd.