The Roles of IL-17A and IL-17F in Mucosal Infection and Allergy
TH17 cells are a subset of CD4+ helper T cells that produce IL-17A, IL-17F, IL-9, IL-21, and IL-22. They play an important role in promoting allergic and auto-immune responses as well as in protecting hosts against pathogens. Because IL-17A and IL-17F have the highest homology among IL-17 family members and bind the same IL-17RA and IL-17RC receptor complex, it is suggested that these two cytokines have similar functions. However, accumulating evidence suggests that these cytokines have overlapping yet distinct roles in the immune system. In this review, we introduce how IL-17A and IL-17F are involved in inflammatory immune responses and host defense mechanisms and discuss their relationship with other cytokines in the development of inflammatory and infectious diseases.
KeywordsArthritis Tuberculosis Psoriasis Aspergillus Candida
This work is supported by Grants in Aid from the Ministry of Education, Culture, Sports, Science and Technology of Japan and Core Research for Evolutional Science and Technology of the Japan.
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