Allergen endotoxins induce T-cell-dependent and non-IgE-mediated nasal hypersensitivity in mice

被引:24
|
作者
Iwasaki, Naruhito [1 ,2 ]
Matsushita, Kazufumi [1 ]
Fukuoka, Ayumi [1 ]
Nakahira, Masakiyo [3 ]
Matsumoto, Makoto [3 ]
Akasaki, Shoko [1 ]
Yasuda, Koubun [3 ]
Shimizu, Takeshi [2 ]
Yoshimoto, Tomohiro [1 ,3 ]
机构
[1] Hyogo Coll Med, Inst Adv Med Sci, Lab Allerg Dis, Nishinomiya, Hyogo 6638501, Japan
[2] Shiga Univ Med Sci, Dept Otorhinolaryngol, Otsu, Shiga, Japan
[3] Hyogo Coll Med, Dept Immunol, Nishinomiya, Hyogo 6638501, Japan
关键词
Allergic rhinitis; CD4(+) T cell; endotoxin; histamine; hypersensitivity; IgE; monocyte/macrophage; nonallergic rhinitis; LPS; NONALLERGIC RHINITIS; MAST-CELLS; HISTIDINE-DECARBOXYLASE; HISTAMINE SYNTHESIS; INNATE IMMUNITY; INFLAMMATION; RESPONSES; MACROPHAGES; ACTIVATION; CHILDREN;
D O I
10.1016/j.jaci.2016.03.023
中图分类号
R392 [医学免疫学];
学科分类号
100102 ;
摘要
Background: Allergen-mediated cross-linking of IgE on mast cells/basophils is a well-recognized trigger for type 1 allergic diseases such as allergic rhinitis (AR). However, allergens may not be the sole trigger for AR, and several allergic-like reactions are induced by non-IgE-mediated mechanisms. Objective: We sought to describe a novel non-IgE-mediated, endotoxin-triggered nasal type-1-hypersensitivity-like reaction in mice. Methods: To investigate whether endotoxin affects sneezing responses, mice were intraperitoneally immunized with ovalbumin (OVA), then nasally challenged with endotoxin-free or endotoxin-containing OVA. To investigate the role of T cells and mechanisms of the endotoxin-induced response, mice were adoptively transferred with in vitro-differentiated OVA-specific T(H)2 cells, then nasally challenged with endotoxin-free or endotoxin-containing OVA. Results: Endotoxin-containing, but not endotoxin-free, OVA elicited sneezing responses in mice independent from IgE-mediated signaling. OVA-specific T(H)2 cell adoptive transfer to mice demonstrated that local activation of antigen-specific T(H)2 cells was required for the response. The Toll-like receptor 4-myeloid differentiation factor 88 signaling pathway was indispensable for endotoxin-containing OVA-elicited rhinitis. In addition, LPS directly triggered sneezing responses in OVA-specific T(H)2-transferred and nasally endotoxin-free OVA-primed mice. Although antihistamines suppressed sneezing responses, mast-cell/basophil-depleted mice had normal sneezing responses to endotoxin-containing OVA. Clodronate treatment abrogated endotoxin-containing OVA-elicited rhinitis, suggesting the involvement of monocytes/ macrophages in this response. Conclusions: Antigen-specific nasal activation of CD4 1 T cells followed by endotoxin exposure induces mast cell/basophilindependent histamine release in the nose that elicits sneezing responses. Thus, environmental or nasal residential bacteria may exacerbate AR symptoms. In addition, this novel phenomenon might explain currently unknown mechanisms in allergic(-like) disorders.
引用
收藏
页码:258 / +
页数:21
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