[UV-induced immunosuppression and skin cancers].
BACKGROUND
The increased incidence of skin cancers is due to modifications of our behavior toward solar exposure. Photocarcinogenesis represents the sum of complex and intricate events that lead to the occurrence of skin cancers.


BACKGROUND
In epidermal cells UV light induces lesions of DNA that lead to modifications in oncogene and tumor suppressor gene expression. UV-induced immunosuppression is also important for tumoral promotion. UV exposure decreases the number of Langerhans cells in the epidermis and modifies their antigen-presenting cell capacity. Numerous experimental data obtained in animal models clearly indicate the existence of a relationship between UV-induced immune suppression and skin cancers. In humans, growing evidence suggests that skin cancers and photoimmunosuppression are linked.


CONCLUSIONS
Better knowledge of mechanisms involved in UV-induced immune suppression is essential for developing new strategies aimed at photoprotection and cancer prevention.
Service de dermatologie-allergologie-photobiologie, Hôpital Saint-Eloi, Montpellier, France.
L
L
Meunier
N
N
Raison-Peyron
J
J
Meynadier
D000818:Animals; D002280:Basal Cell Carcinoma / Q000209:etiology* / Q000517:prevention & control; D002294:Carcinoma, Squamous Cell / Q000209:etiology* / Q000517:prevention & control; D002648:Child; D006801:Humans; D007108:Immune Tolerance / Q000528:radiation effects; D008545:Melanoma / Q000209:etiology* / Q000517:prevention & control; D051379:Mice; D008875:Middle Aged; D009381:Neoplasms, Radiation-Induced / Q000209:etiology* / Q000517:prevention & control; D009893:Opossums; D011829:Radiation Dosage; D012867:Skin / Q000276:immunology / Q000528:radiation effects; D012878:Skin Neoplasms / Q000209:etiology* / Q000517:prevention & control; D013473:Sunscreening Agents / Q000627:therapeutic use; D014466:Ultraviolet Rays / Q000009:adverse effects*
D013473:Sunscreening Agents
Immunosuppression photo-induite et cancers cutanés.