Journal
NATURE IMMUNOLOGY
Volume 11, Issue 3, Pages 250-U9Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ni.1846
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Funding
- NIH
- Royal Thai government
- Trust Fellow of the MD Anderson Cancer Center
- Leukemia and Lymphoma Society Scholar
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The physiological regulation of the expression of interleukin (IL)-9, a cytokine traditionally regarded as being T(H)2 associated, remains unclear. Here, we show that IL-9-expressing T cells generated in vitro in the presence of transforming growth factor-beta and IL-4 express high levels of mRNA for IL-17 receptor B (IL-17RB), the receptor for IL-25. Treatment of these cells with IL-25 enhances IL-9 expression in vitro. Moreover, transgenic and retroviral overexpression of IL-17RB in T cells results in IL-25-induced IL-9 production that is IL-4 independent. In vivo, the IL-25-IL-17RB pathway regulates IL-9 expression in allergic airway inflammation. Thus, IL-25 is a newly identified regulator of IL-9 expression.
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