The Journal of Experimental Medicine
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Published online 9 October 2006 doi:10.1084/jem.20061082
Rockefeller University Press, 0022-1007 $8.00
JEM, Volume 203, Number 11, 2485-2494
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ARTICLE

IL-23 plays a key role in Helicobacter hepaticus–induced T cell–dependent colitis

Marika C. Kullberg1,2, Dragana Jankovic1, Carl G. Feng1, Sophie Hue3, Peter L. Gorelick4, Brent S. McKenzie5, Daniel J. Cua5, Fiona Powrie3, Allen W. Cheever6, Kevin J. Maloy3, and Alan Sher1

1 Immunobiology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Disease, National Institutes of Health, Bethesda, MD 20892
2 Immunology and Infection Unit, Department of Biology, University of York and The Hull York Medical School, York YO10 5YW, UK
3 Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK
4 Animal Health Diagnostic Laboratory, Laboratory Animal Sciences Program, National Cancer Institute-FCRDC, Science Applications International Corporation, Frederick, MD 21702
5 Department of Discovery Research, Schering-Plough Biopharma, Palo Alto, CA 94304
6 The Biomedical Research Institute, Rockville, MD 20852

CORRESPONDENCE Marika C. Kullberg: mk512{at}york.ac.uk

Inflammatory bowel disease (IBD) is a chronic inflammatory disorder of the gastrointestinal tract that is caused in part by a dysregulated immune response to the intestinal flora. The common interleukin (IL)-12/IL-23p40 subunit is thought to be critical for the pathogenesis of IBD. We have analyzed the role of IL-12 versus IL-23 in two models of Helicobacter hepaticus–triggered T cell–dependent colitis, one involving anti–IL-10R monoclonal antibody treatment of infected T cell–sufficient hosts, and the other involving CD4+ T cell transfer into infected Rag–/– recipients. Our data demonstrate that IL-23 and not IL-12 is essential for the development of maximal intestinal disease. Although IL-23 has been implicated in the differentiation of IL-17–producing CD4+ T cells that alone are sufficient to induce autoimmune tissue reactivity, our results instead support a model in which IL-23 drives both interferon {gamma} and IL-17 responses that together synergize to trigger severe intestinal inflammation.


Abbreviations used: CIA, collagen-induced arthritis; EAE, experimental autoimmune encephalomyelitis; Hh+, H. hepaticus–infected; IBD, inflammatory bowel disease; MLN, mesenteric lymph node; SHelAg, soluble H. hepaticus antigen.

K.J. Maloy and A. Sher contributed equally to this work.


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