The Journal of Experimental Medicine
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Published 18 January 2005. doi:10.1084/jem.20041257
Rockefeller University Press, 0022-1007 $8.00
JEM, Volume 201, Number 2, 233-240
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ARTICLE

IL-23 drives a pathogenic T cell population that induces autoimmune inflammation

Claire L. Langrish1, Yi Chen1, Wendy M. Blumenschein2, Jeanine Mattson2, Beth Basham3, Jonathan D. Sedgwick1, Terrill McClanahan2, Robert A. Kastelein1, and Daniel J. Cua1

1 Discovery Research, DNAX Research Inc., Palo Alto, CA 94304
2 Experimental Pathology and Pharmacology, DNAX Research Inc., Palo Alto, CA 94304
3 Bioinformatics, DNAX Research Inc., Palo Alto, CA 94304

CORRESPONDENCE Daniel J. Cua: daniel.cua{at}dnax.org

Interleukin (IL)-23 is a heterodimeric cytokine composed of a unique p19 subunit, and a common p40 subunit shared with IL-12. IL-12 is important for the development of T helper (Th)1 cells that are essential for host defense and tumor suppression. In contrast, IL-23 does not promote the development of interferon-{gamma}–producing Th1 cells, but is one of the essential factors required for the expansion of a pathogenic CD4+ T cell population, which is characterized by the production of IL-17, IL-17F, IL-6, and tumor necrosis factor. Gene expression analysis of IL-23–driven autoreactive T cells identified a unique expression pattern of proinflammatory cytokines and other novel factors, distinguishing them from IL-12–driven T cells. Using passive transfer studies, we confirm that these IL-23–dependent CD4+ T cells are highly pathogenic and essential for the establishment of organ-specific inflammation associated with central nervous system autoimmunity.


Abbreviations used: CIA, collagen-induced arthritis; CNS, central nervous system; DLN, draining LN; EAE, experimental autoimmune encephalomyelitis; MOG, myelin-oligodendrocyte glycoprotein peptide; PLP, proteolipid protein peptide.


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