Title |
Cutting Edge: ABIN-1 Protects against Psoriasis by Restricting MyD88 Signals in Dendritic Cells
|
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Published in |
The Journal of Immunology, July 2013
|
DOI | 10.4049/jimmunol.1203335 |
Pubmed ID | |
Authors |
Joseph A. Callahan, Gianna E. Hammer, Alexander Agelides, Bao H. Duong, Shigeru Oshima, Jeffrey North, Rommel Advincula, Nataliya Shifrin, Hong-An Truong, Jonathan Paw, Julio Barrera, Anthony DeFranco, Michael D. Rosenblum, Barbara A. Malynn, Averil Ma |
Abstract |
Psoriasis is a chronic, inflammatory skin disease caused by a combination of environmental and genetic factors. The Tnip1 gene encodes A20 binding and inhibitor of NF-κB-1 (ABIN-1) protein and is strongly associated with susceptibility to psoriasis in humans. ABIN-1, a widely expressed ubiquitin-binding protein, restricts TNF- and TLR-induced signals. In this study, we report that mice lacking ABIN-1 specifically in dendritic cells (DCs), ABIN-1(fl) CD11c-Cre mice, exhibit perturbed immune homeostasis. ABIN-1-deficient DCs display exaggerated NF-κB and MAPK signaling and produce more IL-23 than do normal cells in response to TLR ligands. Challenge of ABIN-1(fl) CD11c-Cre mice with topical TLR7 ligand leads to greater numbers of Th17 and TCRγδ T cells and exacerbated development of psoriaform lesions. These phenotypes are reversed by DC-specific deletion of the TLR adaptor MyD88. These studies link ABIN-1 with IL-23 and IL-17, and they provide cellular and molecular mechanisms by which ABIN-1 regulates susceptibility to psoriasis. |
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