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Regulation of immune responses by interleukin-27

Authors

  • Hiroki Yoshida,

    1. Department of Biomolecular Sciences, Division of Molecular and Cellular Immunoscience, Faculty of Medicine, Saga University, Saga, Japan.
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  • Miyazaki Yoshiyuki

    1. Department of Biomolecular Sciences, Division of Molecular and Cellular Immunoscience, Faculty of Medicine, Saga University, Saga, Japan.
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Errata

This article is corrected by:

  1. Errata: Corrigendum Volume 227, Issue 1, 283, Article first published online: 19 December 2008


Hiroki Yoshida
Department of Biomolecular Sciences
Division of Molecular and Cellular Immunoscience
Saga University
Faculty of Medicine
5-1-1 Nabeshima
Saga 849-8501
Japan
Tel.: +81 952 34 2290
Fax: +81 952 34 2062
e-mail: yoshidah@med.saga-u.ac.jp

Abstract

Summary: Cytokine-mediated immunity plays a crucial role in the pathogenesis of various diseases including autoimmunity. Recently, interleukin-27 (IL-27) was identified, which, along with IL-12, IL-23, and IL-35, belongs to the IL-12 cytokine family. These family members play roles in the regulation of T helper (Th) cell differentiation. IL-27 is unique in that while it induces Th1 differentiation, the same cytokine suppresses immune responses. In the absence of IL-27-mediated immunosuppression, hyper-production of various pro-inflammatory cytokines concomitant with severe inflammation in affected organs was observed in IL-27 receptor α chain (WSX-1)-deficient mice infected with Trypanosoma cruzi. Experimental allergic or inflammatory responses were also enhanced in WSX-1-deficient mice. The immunosuppressive effects of IL-27 depend on inhibition of the development of Th17 cells (a newly identified inflammatory T-helper population) and induction of IL-10 production. Moreover, administration of IL-27 or augmentation of IL-27 signaling suppresses some diseases of autoimmune or allergic origin, demonstrating its potential in therapy of diseases mediated by inflammatory cytokines. In this review, we discuss recent studies on the role of IL-27 in immunity to parasitic and bacterial infections as well as in allergy and autoimmunity in view of its pro- and anti-inflammatory properties.

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