Journal
DERMATOLOGIC CLINICS
Volume 38, Issue 1, Pages 37-+Publisher
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.det.2019.08.004
Keywords
Phototherapy; UV radiation; Apoptosis; Immunosuppression; Urocanic acid; Platelet-activating factor; IL-23TTH17 axis; Regulatory T cells (Tregs center dot)
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Phototherapeutic modalities induce apoptosis of keratinocytes and immune cells, impact cytokine production, downregulate the IL-23/Th17 axis, and induce regulatory T cells. As in anti-IL-17 or anti-IL-23 antibody treatment, the dual action of phototherapy on skin and the immune system is likely responsible for sustained resolution of lesions in diseases such as psoriasis. In cutaneous T cell lymphoma, phototherapy may function by causing tumor cell apoptosis and eliminating the neoplastic and inflammatory infiltrate. Further research on phototherapeutic mechanisms will help advance, optimize, and refine dermatologic treatments and may open up novel avenues for treatment strategies in dermatology and beyond.
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