期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-017-06962-x
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT Japan) [26221305, 00707193]
- Ministry of Health, Labor and Welfare
- Practical Research Project for Allergic Diseases and Immunology from Japan Agency for Medical Research and Development (AMED)
- Astellas Foundation for Research on Metabolic Disorders
- Uehara Memorial Foundation
- Osaka Foundation for Promotion of Fundamental Medical Research
- Kanae Foundation for the Promotion of Medical Science
- Takeda Science Foundation
- Naito Foundation
- Grants-in-Aid for Scientific Research [17K08876, 26221305] Funding Source: KAKEN
The lung develops an unique epithelial barrier system to protect host from continuous invasion of various harmful particles. Interleukin (IL-)33 released from epithelial cells in the lung drives the type 2 immune response by activating ST2-expressed immune cells in various allergic diseases. However, the involvement of memory-type ST2(+)CD4(+)T cells in such lung inflammation remains unclear. Here we demonstrated that intratracheal administration of IL-33 resulted in the substantial increase of numbers of tissue-resident memory-type ST2(+)CD4(+)T cells in the lung. Following enhanced production of IL-5 and IL-13, eosinophilic lung inflammation sequentially developed. IL-33-mediated eosinophilic lung inflammation was not fully developed in T cell-deficient Foxn1(nu) mice and NSG mice. Dexamethasone treatment showed limited effects on both the cell number and function of memory-type ST2(+)CD4(+)T cells. Thus our study provides novel insight into the pathogenesis of eosinophilic lung disease, showing that memory-type ST2(+)CD4(+)T cells are involved in IL-33-induced eosinophilic inflammation and elicited steroid-resistance.
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