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IL-22, not simply a Th17 cytokine.
MedLine Citation:
PMID:  23405899     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Interleukin-22 (IL-22) has important functions in host defense at mucosal surfaces as well as in tissue repair. It is unique as a cytokine that is produced by immune cells, including T-helper (Th) cell subsets and innate lymphocytes, but acts only on non-hematopoietic stromal cells, in particular epithelial cells, keratinocytes, and hepatocytes. Although IL-22 is beneficial to the host in many infectious and inflammatory disorders, depending on the target tissue it can be pathogenic due to its inherent pro-inflammatory properties, which are further enhanced when IL-22 is released together with other pro-inflammatory cytokines, in particular IL-17. To avoid pathology, IL-22 and IL-17 production have to be controlled tightly and independently. While common factors such as signal transducer and activator of transcription 3 (STAT3) and retinoid orphan receptor γt (RORγt) drive the expression of both cytokines, other factors, such as c-Maf act specifically on IL-22 and enable the separate expression of either cytokine. Here, we discuss the production of IL-22 from various T-cell populations as well as protective versus pathogenic roles of IL-22. Finally, we focus on recent advances in our understanding of the molecular regulation of IL-22 in T cells.
Authors:
Sascha Rutz; Céline Eidenschenk; Wenjun Ouyang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Immunological reviews     Volume:  252     ISSN:  1600-065X     ISO Abbreviation:  Immunol. Rev.     Publication Date:  2013 Mar 
Date Detail:
Created Date:  2013-02-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7702118     Medline TA:  Immunol Rev     Country:  England    
Other Details:
Languages:  eng     Pagination:  116-32     Citation Subset:  IM    
Copyright Information:
© 2013 John Wiley & Sons A/S. Published by Blackwell Publishing Ltd.
Affiliation:
Department of Immunology, Genentech, South San Francisco, CA, USA.
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