Induction of immune tolerance and reduction of aggravated lung eosinophilia by co-exposure to Asian sand dust and ovalbumin for 14 weeks in mice.

Induction of immune tolerance and reduction of aggravated lung eosinophilia by co-exposure to Asian sand dust and ovalbumin for 14 weeks in mice.
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DOI:
10.1186/1710-1492-9-19
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发表时间:
2013
期刊:
Allergy, asthma, and clinical immunology : official journal of the Canadian Society of Allergy and Clinical Immunology
影响因子:
--
通讯作者:
Shibamoto T
Shibamoto T
中科院分区:
其他
文献类型:
--
作者:
He M;Ichinose T;Yoshida S;Takano H;Nishikawa M;Sun G;Shibamoto T

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亚洲沙尘(ASD)风暴造成的大气污染会加重成人和儿童的哮喘。本研究旨在调查同时暴露于过敏原和 ASD 6 周和 14 周引起的过敏性气道疾病的一系列表现。 CD-1 小鼠气管内滴注 0.1 mg ASD/小鼠,每两周一次(总剂量为 0.4 mg 或 0.8 mg/小鼠)四次(6 周)或八次(14 周),有或没有卵清蛋白 (OVA)。检测治疗 CD-1 小鼠的气道病理变化、支气管肺泡灌洗液 (BALF) 的细胞学变化、BALF 中炎症细胞因子/趋化因子的水平以及血清中 OVA 特异性 IgE 和 IgG1 抗体。四次同时暴露于 OVA 和 ASD 会加重过敏性气道炎症,同时还会加重 BALF 中的 Th2 细胞因子 IL-13 和嗜酸性粒细胞相关细胞因子/趋化因子 IL-5、嗜酸性粒细胞趋化因子和 MCP-3,以及气道上皮下层的纤维增厚。另一方面,八次共同暴露减弱了这些变化,同时 BALF 中 TGF-β1 显着增加。然而,在八次共同暴露中仍然可以看到 ASD 对血清中 IgG1 和 IgE 产生的佐剂作用。这些结果表明,四次同时暴露于 ASD 和 OVA 会加剧气道中的免疫反应,但八次共同暴露时会出现抑制反应,表明这些反应是由 TGF-β1 相关的免疫耐受引起的。
Atmospheric contamination caused by Asian sand-dust (ASD) storms aggravates asthma in both human adults and children. This study aims to investigate a series of manifestations in allergic airway disease caused by co-exposure to allergens and ASD for 6 weeks and 14 weeks. CD-1 Mice were instilled intratracheally with 0.1 mg of ASD/mouse four times (6 weeks) or eight times (14 weeks) at 2-week intervals (total dose of 0.4 mg or 0.8 mg/mouse) with or without ovalbumin (OVA). The pathologic changes in the airway, cytological alteration in bronchoalveolar lavage fluid (BALF), and levels of inflammatory cytokines/chemokines in BALF, and OVA-specific IgE and IgG1 antibodies in serum were measured in the treated CD-1 mice. Four-time co-exposure to OVA and ASD aggravates allergic airway inflammation along with Th2-cytokine IL-13 and eosinophil-relevant cytokine/chemokines IL-5, Eotaxin and MCP-3 in BALF, and fibrous thickening of the subepithelial layer in the airway. On the other hand, eight-time co-exposure attenuates these changes along with a significant increase of TGF-β1 in BALF. Adjuvant effects of ASD toward IgG1 and IgE production in sera were, however, still seen in the eight-time co-exposure. These results indicate that the immune responses in airways are exacerbated by four-time co-exposure to ASD with OVA, but that there is a shift to suppressive responses in eight-time co-exposure, suggesting that the responses are caused by TGF-β1-related immune tolerance.
CD4+ CD25+调节T细胞体内转移后气道炎症和过度反应性的分辨率取决于白介素10。
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