The critical role of epithelial-derived Act1 in IL-17- and IL-25-mediated pulmonary inflammation.

The critical role of epithelial-derived Act1 in IL-17- and IL-25-mediated pulmonary inflammation.
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DOI:
10.4049/jimmunol.182.3.1631
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发表时间:
2009-02-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Li X
Li X
中科院分区:
其他
文献类型:
--
作者:
Swaidani S;Bulek K;Kang Z;Liu C;Lu Y;Yin W;Aronica M;Li X

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IL-25 启动、促进和增强 Th2 免疫反应。我们在这里报道 Act1 是 IL-17 介导的信号传导的关键成分,也是 IL-25 信号传导的重要信号分子。虽然与野生型小鼠相比,Act1 缺陷小鼠在 IL-17 刺激下 KC (CXCL1) 表达和气道中性粒细胞募集减少,但 Act1 缺陷消除了 IL-25 诱导的 IL-4、IL-5、IL-13、eotaxin-1 (CCL11) 和肺嗜酸粒细胞增多的表达。使用过敏性肺部炎症小鼠模型,我们观察到与野生型小鼠相比,Act1 缺陷小鼠的 Th2 反应和肺部炎症减弱。重要的是,上皮细胞中 Act1 缺陷分别由于 IL-17 诱导的中性粒细胞和 IL-25 诱导的嗜酸性粒细胞减少而减少了过敏性肺部炎症的表型。这些结果证明了上皮源性 Act1 通过 IL-17R-Act1 和 IL-25R-Act1 轴的独特影响在过敏性肺部炎症中的重要作用。这些发现对于理解包括过敏性哮喘在内的特应性疾病的病理学至关重要,过敏性哮喘将 Act1 确定为潜在的治疗靶点。
IL-25 initiates, promotes, and augments Th2 immune responses. We here report that Act1, a key component in IL-17-mediated signaling, is an essential signaling molecule for IL-25 signaling. While Act1-deficient mice showed reduced expression of KC (CXCL1) and neutrophil recruitment to the airway compared to wild-type mice in response to IL-17 stimulation, Act1 deficiency abolished IL-25-induced expression of IL-4, IL-5, IL-13, eotaxin-1 (CCL11), and pulmonary eosinophilia. Using a mouse model of allergic pulmonary inflammation, we observed diminished Th2 responses and lung inflammation in Act1-deficient mice compared to wild-type mice. Importantly, Act1 deficiency in epithelial cells reduced the phenotype of allergic pulmonary inflammation due to loss of IL-17-induced neutrophilia and IL-25-induced eosinophilia, respectively. These results demonstrate the essential role of epithelial-derived Act1 in allergic pulmonary inflammation through the distinct impact of the IL-17R-Act1 and IL-25R-Act1 axes. Such findings are crucial for the understanding of pathobiology of atopic diseases including allergic asthma, which identifies Act1 as a potential therapeutic target.
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