Induction of airway hyperreactivity by IL-25 is dependent on a subset of invariant NKT cells expressing IL-17RB.

Induction of airway hyperreactivity by IL-25 is dependent on a subset of invariant NKT cells expressing IL-17RB.
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DOI:
10.4049/jimmunol.0804213
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发表时间:
2009-04-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Akbari O
Akbari O
中科院分区:
其他
文献类型:
--
作者:
Stock P;Lombardi V;Kohlrautz V;Akbari O

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IL-25已被证明可诱导小鼠Th2反应和气道高反应性(AHR),但其作用机制尚不清楚,也不清楚哪些细胞介导了这种疾病。在这项研究中,我们发现IL-25的受体IL-17RB在初始和活化的CD4+不变NKT (iNKT)细胞亚群上高度表达,而在活化的T细胞上则不表达。IL-17RB+ iNKT细胞产生大量Th2细胞因子,IL-25刺激显著增加Th2细胞因子。此外,IL-17RB+ iNKT细胞能够恢复iNKT细胞缺陷小鼠的AHR,而IL-17RB−iNKT细胞不能重建AHR和肺部炎症。最后,在野生型小鼠的肺中检测到IL-17RB+ iNKT细胞,在iNKT细胞缺陷小鼠中,经鼻给药IL-25诱导AHR明显受损。总的来说,我们的数据表明iNKT细胞在il -25介导的AHR中起关键作用。这些结果可能会导致针对IL-17RB+ iNKT细胞治疗过敏性哮喘的新治疗方法。
IL-25 has been shown to induce Th2 responses and airway hyperreactivity (AHR) in mice, but the mechanism of action is not understood and it is unclear which cells mediate this disease. In this study we show that the receptor for IL-25, IL-17RB, is highly expressed on a subset of naive and activated CD4+ invariant NKT (iNKT) cells, but not on activated T cells. IL-17RB+ iNKT cells produced large amounts of Th2 cytokines that were substantially increased by IL-25 stimulation. Furthermore, IL-17RB+ iNKT cells were capable of restoring AHR in iNKT cell-deficient mice, whereas IL-17RB− iNKT cells failed to reconstitute AHR and lung inflammation. Finally, IL-17RB+ iNKT cells were detected in the lungs of wild-type mice, and induction of AHR by intranasal administration of IL-25 was significantly impaired in iNKT cell-deficient mice. Overall, our data suggest a critical role for iNKT cells in IL-25-mediated AHR. These results may lead to novel therapeutic approaches to target IL-17RB+ iNKT cells for the treatment of allergic asthma.
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