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一个单一的原始事件阻止了口服对花生的耐受性
Johanna M Smeekens1,2, Robert M Immormino1, Janelle R Kesselring1,2
1Department of Pediatrics, UNC School of Medicine, Chapel Hill, North Carolina, USA.
概括
一次与辅助剂一起接触花生可以导致花生过敏,即使在高剂量口服养后. 早期引入花生至关重要,以防止通过非口腔途径引起敏感性.
科学领域:
- 免疫学 免疫学 免疫学
- 过敏研究 研究过敏
- 环境健康 环境健康
背景情况:
- 室内灰尘含有花生蛋白和LPS等辅助剂,可以促进气道对花生敏感.
- 了解早期接触花生的免疫反应对于预防花生过敏至关重要.
研究的目的:
- 调查是否单次接触花生加上辅助剂的气道暴露足以防止口服耐受性.
- 为了确定早期气道预制对花生过敏与耐受性发展的影响.
主要方法:
- 小鼠通过气道一次暴露于花生加辅助剂,随后口服或气道暴露于花生.
- 在呼吸道敏感化之前,通过食高剂量的花生来评估口服耐受性.
- 量化了花生特定的IgE,IgG1和CD4+记忆T细胞.
主要成果:
- 气道接触花生与辅助剂的小鼠对过敏,超过口服耐受性.
- 一次使用花生和辅助剂的气道开事件导致过敏,即使在高剂量口服花生养后也是如此.
- 特定于花生的CD4+记忆T细胞在呼吸道初始化后很早就被检测出来,随后的食时间影响了耐受性.
结论:
- 一次接触花生和辅助剂的呼吸道暴露可以为免疫系统做好过敏的准备,超过口服耐受性.
- 早期引入花生很重要,以防止通过非口腔途径引起敏感性.
- 口服暴露的时间相对于呼吸道预制有显著影响过敏的发展.
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