alexa Induction of IL-4 expression in CD4(+) T cells by thymic stromal lymphopoietin.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Omori M, Ziegler S

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Abstract The cytokine thymic stromal lymphopoietin (TSLP) has been implicated in the development and progression of allergic inflammation in both humans and mice. Although the underlying mechanism is not known, TSLP-stimulated dendritic cells have been shown to prime human CD4(+) T cells into Th2 cytokine-producing cells. However, its direct effect on CD4(+) T cells has not been extensively investigated. In this study, we show that TSLP can drive Th2 differentiation in the absence of exogenous IL-4 and APCs. IL-4 blockade inhibited TSLP-mediated Th2 differentiation, demonstrating that IL-4 is involved in this process. Further analysis has shown that TSLP-induced Th2 differentiation is dependent on Stat6 and independent of IL-2 and that TSLP treatment leads to immediate, direct Il-4 gene transcription. Taken together, these data demonstrate that TSLP is directly involved in Th2-mediated responses via the induction of IL-4 production.
This article was published in J Immunol and referenced in Journal of Clinical & Cellular Immunology

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