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- W1966312117 abstract "Despite the importance of interleukin-13 (IL-13) in systemic sclerosis (SSc) and other fibrotic diseases, its mechanisms of action are not understood. We have reported that excessive amounts of IL-13 are produced by peripheral blood effector CD8+ T cells from patients with diffuse cutaneous SSc (dcSSc). The aim of the present study was to establish the molecular basis of IL-13 dysregulation in the pathogenesis of SSc.Quantitative polymerase chain reaction analysis and intracellular staining were used to study the transcription factors that control naive peripheral blood CD8+ T cell differentiation into type 1 and type 2 cytokine-secreting cells. Intracellular staining revealed that GATA-3 levels in freshly isolated naive CD8+ T cells correlated with specific clinical manifestations. We therefore assessed the effects of GATA-3 inhibition on IL-13 production in CD8+ T cells from the SSc patients.Freshly isolated naive peripheral blood CD8+ T cells expressed high levels of GATA-3 and failed to down-regulate IL-13 production when cultured under type 1-skewing conditions, but maintained adequate levels of interferon-γ production. Cellular GATA-3 levels were significantly higher in patients with dcSSc and early inflammatory disease. Silencing of GATA-3 with small interfering RNA significantly reduced IL-13 production by CD8+ T cells, demonstrating a causal relationship between GATA-3 and IL-13.These results provide important new insights into SSc pathogenesis and suggest that increased GATA-3 expression in CD8+ T cells could be a highly relevant biomarker of immune dysfunction in patients with dcSSc. GATA-3 could be a novel therapeutic target for this currently incurable disease." @default.
- W1966312117 created "2016-06-24" @default.
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- W1966312117 date "2011-06-01" @default.
- W1966312117 modified "2023-09-25" @default.
- W1966312117 title "GATA-3 up-regulation in CD8+ T cells as a biomarker of immune dysfunction in systemic sclerosis, resulting in excessive interleukin-13 production" @default.
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- W1966312117 doi "https://doi.org/10.1002/art.30489" @default.
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