Epithelial cell-derived IL-25, but not Th17 cell-derived IL-17 or IL-17F, is crucial for murine asthma.

Epithelial cell-derived IL-25, but not Th17 cell-derived IL-17 or IL-17F, is crucial for murine asthma.
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DOI:
10.4049/jimmunol.1200461
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发表时间:
2012-10-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Nakae S
Nakae S
中科院分区:
其他
文献类型:
--
作者:
Suzukawa M;Morita H;Nambu A;Arae K;Shimura E;Shibui A;Yamaguchi S;Suzukawa K;Nakanishi W;Oboki K;Kajiwara N;Ohno T;Ishii A;Körner H;Cua DJ;Suto H;Yoshimoto T;Iwakura Y;Yamasoba T;Ohta K;Sudo K;Saito H;Okumura K;Broide DH;Matsumoto K;Nakae S

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IL-17A、IL-17F和IL-25是IL-17RA的配体。在本研究中,我们证明IL-25缺陷小鼠,而不是IL-17A、IL-17F、IL-17A/F、IL-23p19和RoR-γT缺陷小鼠,在卵白蛋白诱导的Th2型/嗜酸性气道炎症中,显著抑制了支气管肺泡灌洗液中嗜酸粒细胞的数量和促炎介质的水平,对乙酰甲胆碱的高反应性,或血清中卵白蛋白特异性的IgG1IgG1和IgE水平,在抗原致敏期间对肺DC迁移或抗原特异性记忆Th2细胞的扩张没有任何影响。通过过继转移IL-25缺陷小鼠的T细胞、肥大细胞或骨髓细胞,我们发现,由上皮细胞等呼吸道结构细胞产生的IL-25,而不是由T细胞和肥大细胞等造血干细胞来源的免疫细胞产生的IL-25,对于通过激活肺上皮细胞和嗜酸性粒细胞来诱导Th2型/嗜酸性粒细胞炎症是必不可少的。因此,在Th2型/嗜酸性气道炎的激发阶段,通过促进肺上皮细胞和嗜酸性粒细胞的激活,而不是Th17细胞来源的IL-17A和IL-17F,呼吸道结构细胞来源的IL-25-而不是Th17细胞来源的IL-17A和IL-17F负责局部炎症的诱导,但不是抗原特异性Th2细胞分化所必需的。
IL-17A, IL-17F and IL-25 are ligands for IL-17RA. In the present study, we demonstrated that IL-25-deficient mice, but not IL-17A-, IL-17F-, IL-17A/F-, IL-23p19- and ROR-γt-deficient mice, showed significant suppression of the number of eosinophils and the levels of proinflammatory mediators in bronchoalveolar lavage fluids, airway hyperresponsiveness to methacholine, or ovalbumin-specific IgG1 and IgE levels in the serum during ovalbumin-induced Th2-type/eosinophilic airway inflammation, without any effect on lung DC migration or antigen-specific memory-Th2-cell expansion during antigen sensitization. By adoptive transfer of either T cells, mast cells or bone marrow cells from IL-25-deficient mice, we found that IL-25 produced by airway structural cells such as epithelial cells—but not by such hematopoietic stem-cell-origin immune cells as T cells and mast cells—was indispensable for induction of Th2-type/eosinophilic airway inflammation by activating lung epithelial cells and eosinophils. Therefore, airway structural-cell-derived IL-25—rather than Th17-cell-derived IL-17A and IL-17F—is responsible for induction of local inflammation by promoting activation of lung epithelial cells and eosinophils in the elicitation phase—but is not required for antigen-specific Th2 cell differentiation in the sensitization phase—of Th2-type/eosinophilic airway inflammation.
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