期刊
JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY
卷 134, 期 6, 页码 1422-+出版社
MOSBY-ELSEVIER
DOI: 10.1016/j.jaci.2014.05.011
关键词
IL-33; lung fibrosis; alternatively activated macrophages; type 2 innate lymphoid cells
资金
- Arthritis Research UK [AR UK 18912]
- Medical Research Council UK
- Wellcome Trust
- Medical Research Council [G0901113] Funding Source: researchfish
- Versus Arthritis [19213, 18912] Funding Source: researchfish
- MRC [G0901113] Funding Source: UKRI
Background: The initiation and regulation of pulmonary fibrosis are not well understood. IL-33, an important cytokine for respiratory diseases, is overexpressed in the lungs of patients with idiopathic pulmonary fibrosis. Objectives: We aimed to determine the effects and mechanism of IL-33 on the development and severity of pulmonary fibrosis in murine bleomycin-induced fibrosis. Methods: Lung fibrosis was induced by bleomycin in wild-type or Il33r (St2)(-/-) C57BL/6 mice treated with the recombinant mature form of IL-33 or anti-IL-33 antibody or transferred with type 2 innate lymphoid cells (ILC2s). The development and severity of fibrosis was evaluated based on lung histology, collagen levels, and lavage cytology. Cytokine and chemokine levels were quantified by using quantitative PCR, ELISA, and cytometry. Results: IL-33 is constitutively expressed in lung epithelial cells but is induced in macrophages by bleomycin. Bleomycin enhanced the production of the mature but reduced full-length form of IL-33 in lung tissue. ST2 deficiency, anti-IL-33 antibody treatment, or alveolar macrophage depletion attenuated and exogenous IL-33 or adoptive transfer of ILC2s enhanced bleomycin-induced lung inflammation and fibrosis. These pathologic changes were accompanied, respectively, by reduced or increased IL-33, IL-13, TGF-beta 1, and inflammatory chemokine production in the lung. Furthermore, IL-33 polarized M2 macrophages to produce IL-13 and TGF-beta 1 and induced the expansion of ILC2s to produce IL-13 in vitro and in vivo. Conclusions: IL-33 is a novel profibrogenic cytokine that signals through ST2 to promote the initiation and progression of pulmonary fibrosis by recruiting and directing inflammatory cell function and enhancing profibrogenic cytokine production in an ST2- and macrophage-dependent manner.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据