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Cell Immunol. 2005 Oct;237(2):123-30. Epub 2005 Dec 28.

Therapeutic efficacy of IL-17 neutralization in murine experimental autoimmune encephalomyelitis.

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1
Clinical Research Group for Multiple Sclerosis, Department of Neurology, University of Würzburg, Würzburg, Germany.

Abstract

Experimental autoimmune encephalomyelitis (EAE) is widely regarded as an animal model of the human disease multiple sclerosis. A multitude of studies has investigated the neuroantigen-specific T-cell mediated cytokine pattern present in animals with EAE. In particular, the role of the so-called Th1- and Th2-cytokines has been addressed. In a recent study, it has been demonstrated that IL-23 rather than IL-12 is critical for modulating the character of the developing immune response towards a proinflammatory response and leading to EAE. IL-17 is a crucial effector cytokine, whose production is specifically triggered by IL-23, and it has been shown to be an essential inflammatory mediator in other autoimmune diseases and inflammatory conditions. This led us to investigate the role of IL-17 in EAE. Strong antigen-specific production of IL-17 was demonstrated both in peripheral immune organs and in the CNS in acute and chronic EAE, as demonstrated by ELISPOT and RT-PCR analysis. Therapeutic neutralization of IL-17 with IL-17-receptor-Fc-protein in acute EAE ameliorated clinical symptoms. Neutralization of IL-17 with a monoclonal antibody also ameliorated the disease course. We conclude that IL-17 is crucially involved in the cytokine network as an effector cytokine in EAE.

PMID:
16386239
DOI:
10.1016/j.cellimm.2005.11.002
[Indexed for MEDLINE]
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