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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-30112

Gyülvészi, G; Haak , S; Becher , B (2009). IL-23-driven encephalo-tropism and Th17 polarization during CNS-inflammation in vivo. European Journal of Immunology, 39(7):1864-1869.

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IL-23 but not IL-12 is essential for the development of autoimmune tissue inflammation in mice. Conversely, IL-12 and IL-23 impact on the polarization of Th1 and Th17 cells, respectively. While both polarized T helper populations can mediate autoimmune inflammation, their redundancy in the pathogenesis of EAE indicates that IL-23 exerts its crucial influence on the disease independent of its T helper polarizing capacity. To study the impact of IL-23 and IL-12 on the behavior of encephalitogenic T cells in vivo, we generated BM-chimeric mice in which we can trace individual populations of IL-23 or IL-12 responsive T helper cells during EAE. We observed that T cells, which lack IL-12Rbeta1 (no IL-12 and IL-23 signaling), fail to invade the CNS and do not acquire a Th17 phenotype. In contrast, loss of IL-12 signaling prevents Th1 polarization but does not prevent T-cell entry into the CNS. The loss of IL-12R engagement does not appear to alter T-cell expansion but leads to their accumulation in secondary lymphoid organs. We found that IL-23 licenses T cells to invade the target tissue and to exert their effector function, whereas IL-12 is critical for Th1 differentiation, but does not influence the pathogenic capacity of auto-reactive T helper cells in vivo.

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of Experimental Immunology
DDC:570 Life sciences; biology
610 Medicine & health
Deposited On:12 Feb 2010 07:53
Last Modified:27 Nov 2013 22:01
Publisher DOI:10.1002/eji.200939305
PubMed ID:19544494
Citations:Web of Science®. Times Cited: 29
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Scopus®. Citation Count: 31

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