Frontline Science: RIP2 promotes house dust mite-induced allergic airway inflammation

被引:18
|
作者
Miller, Madelyn H. [1 ]
Shehat, Michael G. [1 ]
Alcedo, Karel P. [2 ]
Spinel, Lina P. [1 ]
Soulakova, Julia [1 ]
Tigno-Aranjuez, Justine T. [1 ,2 ]
机构
[1] Univ Cent Florida, Burnett Sch Biomed Sci, Immun & Pathogenesis Div, Orlando, FL 32816 USA
[2] Univ N Carolina, Dept Cell Biol & Physiol, Chapel Hill, NC USA
关键词
airway epithelium; allergic asthma; dust mite; NOD2; Th2; INNATE LYMPHOID-CELLS; CYTOKINE PRODUCTION; EPITHELIAL-CELLS; INDOOR ALLERGENS; DENDRITIC CELLS; TYPE-2; IMMUNITY; TH2; RESPONSES; T-CELLS; ASTHMA; CHEMOKINE;
D O I
10.1002/JLB.4HI0118-017RR
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
House dust mites (HDMs) are one of the most significant environmental allergens in the establishment of the so-called "Atopic March." It is known that the immune response to HDM is Th2 dominant, but the innate mechanisms leading to HDM-induced type 2 responses are still not completely understood. A number of innate immune receptors have been implicated in the response to HDM including toll-like receptors, C-type lectin receptors, and protease activated receptors. NOD2 is a member of the NOD-like receptor family, which has been reported to be involved in the establishment of type 2 immunity and in blocking respiratory tolerance. NOD2 mediates its effects through its downstream effector kinase, receptor interacting protein (RIP2). It has not been shown if RIP2 is involved in the innate response to HDM and in the resulting generation of type 2 immunity. Furthermore, the role of RIP2 in modulating allergic airway inflammation has been controversial. In this study, we show that RIP2 is activated in airway epithelial cells in response to HDM and is important for the production of CCL2. Using a murine HDM asthma model, we demonstrate that lung pathology, local airway inflammation. inflammatory cytokines. HDM-specific IgG(1) antibody production, and HDM-specific Th2 responses are all reduced in RIP2 knockout mice compared to WT animals. These data illustrate that RIP2 can be activated by a relevant allergic stimulus and that such activation can contribute to allergic airway inflammation. These findings also suggest that RIP2 inhibitors might have some efficacy in down-regulating the inflammatory response in type 2 dominated diseases.
引用
收藏
页码:447 / 459
页数:13
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