niacinamide;
nicotinamide;
skin cancer;
RADIATION-INDUCED IMMUNOSUPPRESSION;
CUTANEOUS MALIGNANT-MELANOMA;
DNA-DAMAGE;
HUMAN KERATINOCYTES;
INDUCED SUPPRESSION;
SUN PROTECTION;
RETINOIC ACID;
UV-RADIATION;
DOUBLE-BLIND;
GREEN TEA;
D O I:
10.1111/phpp.12328
中图分类号:
R75 [皮肤病学与性病学];
学科分类号:
100206 ;
摘要:
Ultraviolet radiation (UVR) causes DNA damage in melanocytes by producing photolesions such as cyclobutane pyrimidine dimers and 8-oxo-7-hydrodeoxyguanosine. The production of reactive oxygen species by UVR also induces inflammatory cytokines that, together with the inherent immunosuppressive properties of UVR, propagate carcinogenesis. Nicotinamide (Vitamin B-3) enhances DNA repair, modulates the inflammatory environment produced by UVR, and reduces UV-induced immunosuppression. As nicotinamide reduces the incidence of actinic keratoses and nonmelanoma skin cancers in high-risk individuals and enhances repair of DNA damage in melanocytes, it is a promising agent for the chemoprevention of melanoma in high-risk populations.