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IL-6 prevents Th2 cell polarization by promoting SOCS3-dependent suppression of IL-2 signaling

ABSTRACT: Defective interleukin-6 (IL-6) signaling has been associated with Th2 bias and elevated IgE. However, the underlying mechanism by which IL-6 may prevent the development of Th2-driven diseases remains unknown. Using a model of house-dust-mite (HDM)-induced Th2 differentiation and allergic airway inflammation, we show here that IL-6 signaling in allergen-specific T cells was required to prevent Th2 development and subsequent IgE response and allergic inflammation. Th2 cell lineage commitment required strong sustained IL-2 signaling. Importantly, we found that IL-6 turned off IL-2 signaling during early T cell activation and thus inhibited Th2 cell priming. Mechanistically, we found that IL-6-driven inhibition of IL-2 signaling in responding T cells was mediated by upregulation of suppressor of cytokine signaling 3 (SOCS3). Therapeutically, this mechanism can be mimicked by JAK1 inhibition. Collectively, our results identify an unrecognized mechanism that prevents the development of unwanted Th2 cell responses and associated diseases and outline potential preventive interventions.

ORGANISM(S): Mus musculus

PROVIDER: GSE212158 | GEO | 2023/04/07

REPOSITORIES: GEO

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