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首页> 外文期刊>Allergology international: official journal of the Japanese Society of Allergology >Interleukin-19 downregulates interleukin-4-induced eotaxin production in human nasal fibroblasts.
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Interleukin-19 downregulates interleukin-4-induced eotaxin production in human nasal fibroblasts.

机译:白细胞介素19下调人鼻成纤维细胞中白细胞介素4诱导的嗜酸性粒细胞趋化因子的产生。

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摘要

BACKGROUND: Interleukin-19 (IL-19), a member of the IL-10 family, is characterized as the cytokine suppressing the release and function of several proinflammatory cytokines. For regulation of local reaction in allergic rhinitis (AR), IL-19 might play an especially important role. METHODS: We examined effects of IL-19 on IL-4-induced eotaxin production by human nasal fibroblasts. Early receptor-mediated events (expression of the suppressors of cytokine signaling (SOCS) and phosphorylation of signal transducer and activator of transcription 6 [STAT6]) by IL-19 was examined. Knockdown methods by RNAi were administered to investigate the involvement of those signal transductions. RESULTS: Pretreatment with IL-19 downregulates IL-4-induced eotaxin production, but not interferon-gamma(IFN-gamma)-induced RANTES. Pretreatment with IL-19 suppressed the IL-4-induced STAT6 phosphorylation. The IL-19 induced SOCS-1, but not SOCS-3 or SOCS-5. The SOCS-1 knockdown by RNAi diminished pretreatment with IL-19-induced down-regulation of eotaxin production. CONCLUSIONS: These results suggest that IL-19 down-regulates IL-4-induced eotaxin production via SOCS-1 in human nasal fibroblasts. In non-hematopoietic cells in AR, IL-19 might be an immunosuppressive factor.
机译:背景:白介素-19(IL-19)是IL-10家族的成员,其特征是抑制多种促炎细胞因子的释放和功能的细胞因子。为了调节变应性鼻炎(AR)中的局部反应,IL-19可能起特别重要的作用。方法:我们研究了IL-19对人鼻成纤维细胞IL-4诱导的嗜酸性粒细胞趋化因子产生的影响。检查了IL-19早期受体介导的事件(细胞因子信号转导抑制剂(SOCS)的表达以及信号转导子和转录激活子6 [STAT6]的磷酸化)。使用RNAi的抑制方法来研究这些信号转导的参与。结果:IL-19预处理可下调IL-4诱导的趋化因子生成,但不会干扰素-γ(IFN-γ)诱导的RANTES。用IL-19预处理可抑制IL-4诱导的STAT6磷酸化。 IL-19诱导了SOCS-1,但没有诱导SOCS-3或SOCS-5。 RNAi对SOCS-1的抑制作用减少了IL-19诱导的嗜酸性粒细胞趋化因子产生的下调。结论:这些结果表明IL-19通过人鼻成纤维细胞中的SOCS-1下调IL-4诱导的趋化因子的产生。在AR的非造血细胞中,IL-19可能是一种免疫抑制因子。

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