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Biological and clinical significance of T helper 17 cell deficiency: insight into monogenic defects


A. U. Anka1, I. N. Abdullahi1, K. Umar1, Z. Mohammed Bello1, M. Mohammed2, S. Gachpaz Sarkhiz3, N. Abubakar Kaoje4, M. Alsabbagh5, A. N. Kamali6, G. Azizi azizi@abzums.ac.ir 7

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Doi
http://doi.org/10.23822/EurAnnACI.1764-1489.160

Summary
T helper 17 (Th17) are a CD4+ T subpopulation cells which are involved in the host protection against microbes such as extracellular and intracellular bacteria, parasites, fungi, and viruses. Monogenic defects including those mutations in some genes such as the signal transducer and activator of transcription (STAT)1 and 3, dedicator of cytokinesis 8 (DOCK8), autoimmune regulator (AIRE), and interleukin 17 receptor A (IL-17RA) can lead to impairment in Th17 cell development and function along with the concomitant increased risk for chronic mucocutaneous candidiasis (CMC). The immunologic abnormalities in these patients include low frequency of Th17 cells; defective cutaneous or in vitro T cell response to Candida species, and/or autoantibodies against relevant cytokines. This review outlines the biological characteristics and functionality of Th17 cells, as well as the clinical features of individuals with genetic defects associated with Th17 deficiency.

Key words
Th17 cells; STAT1; STAT3; DOCK8, AIRE; IL-17RA; chronic mucocutaneous candidiasis

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