The Journal of Experimental Medicine
We report that like other T cells cultured in the presence of transforming growth factor (TGF) beta, Th17 cells also produce interleukin (IL) 9. Th17 cells generated in vitro with IL-6 and TGF-beta as well as purified ex vivo Th17 cells both produced IL-9. To determine if IL-9 has functional consequences in Th17-mediated inflammatory disease, we evaluated the role of IL-9 in the development and progression of experimental autoimmune encephalomyelitis, a mouse model of multiple sclerosis. The data show that IL-9 neutralization and IL-9 receptor deficiency attenuates disease, and this correlates with decreases in Th17 cells and IL-6-producing macrophages in the central nervous system, as well as mast cell numbers in the regional lymph nodes. Collectively, these data implicate IL-9 as a Th17-derived cytokine that can contribute to inflammatory disease.
Nowak, Elizabeth C.; Weaver, Casey T.; Turner, Henrietta; Begum-Haque, Sakhina; Becher, Burkhard; Schreiner, Bettina; Coyle, Anthony J.; Kasper, Lloyd H.; and Noelle, Randolph J., "IL-9 as a Mediator of Th17-driven Inflammatory Disease" (2009). Open Dartmouth: Faculty Open Access Articles. 1190.