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IL-1 family members and STAT activators induce cytokine production by Th2, Th17, and Th1 cells.

Guo L., Wei G., Zhu J., Liao W., Leonard W.J., Zhao K., Paul W.

Expression of T1ST2, the IL-33R, by Th2 cells requires GATA3. Resting Th2 cells express little GATA3, which is increased by IL-33 and a STAT5 activator, in turn increasing T1ST2 from its low-level expression on resting Th2 cells. Th2 cells that have upregulated T1ST2 produce IL-13, but not IL-4, in response to IL-33 plus a STAT5 activator in an antigen-independent, NF-kappaB-dependent, cyclosporin A (CsA)-resistant manner. Similarly, Th17 cells produce IL-17A in response to IL-1beta and a STAT3 activator and Th1 cells produce IFNgamma in response to IL-18 and a STAT4 inducer. Thus, each effector Th cell produces cytokines without antigenic stimulation in response to an IL-1 family member and a specific STAT activator, implying an innate mechanism through which memory CD4 T cells are recruited by an induced cytokine environment.

Proc. Natl. Acad. Sci. U.S.A. 106:13463-13468(2009) [PubMed] [Europe PMC]

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