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Cutting edge: TNF receptor-associated factor 4 restricts IL-17-mediated pathology and signaling processes
Journal article   Peer reviewed

Cutting edge: TNF receptor-associated factor 4 restricts IL-17-mediated pathology and signaling processes

Jarod A Zepp, Caini Liu, Wen Qian, Ling Wu, Muhammet F Gulen, Zizhen Kang and Xiaoxia Li
The Journal of immunology (1950), Vol.189(1), pp.33-37
07/01/2012
DOI: 10.4049/jimmunol.1200470
PMCID: PMC3590847
PMID: 22649194

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Abstract

The effector T cell subset, Th17, plays a significant role in the pathogenesis of multiple sclerosis and of other autoimmune diseases. The signature cytokine, IL-17, engages the IL-17R and recruits the E3-ligase NF-κB activator 1 (Act1) upon stimulation. In this study, we examined the role of TNFR-associated factor (TRAF)4 in IL-17 signaling and Th17-mediated autoimmune encephalomyelitis. Primary cells from TRAF4-deficient mice displayed markedly enhanced IL-17-activated signaling pathways and induction of chemokine mRNA. Adoptive transfer of MOG35-55 specific wild-type Th17 cells into TRAF4-deficient recipient mice induced an earlier onset of disease. Mechanistically, we found that TRAF4 and TRAF6 used the same TRAF binding sites on Act1, allowing the competition of TRAF4 with TRAF6 for the interaction with Act1. Taken together, the results of this study reveal the necessity of a unique role of TRAF4 in restricting the effects of IL-17 signaling and Th17-mediated disease.
Animals Encephalomyelitis, Autoimmune, Experimental - genetics Encephalomyelitis, Autoimmune, Experimental - immunology Encephalomyelitis, Autoimmune, Experimental - pathology HEK293 Cells HeLa Cells Humans Interleukin-17 - antagonists & inhibitors Interleukin-17 - genetics Interleukin-17 - physiology Mice Mice, Inbred C57BL Mice, Knockout RNA, Messenger - biosynthesis Signal Transduction - genetics Signal Transduction - immunology Th17 Cells - immunology Th17 Cells - pathology TNF Receptor-Associated Factor 4 - deficiency TNF Receptor-Associated Factor 4 - genetics TNF Receptor-Associated Factor 4 - physiology

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