摄入的室内灰尘虫有利于对小鼠卵白的敏感化,独立于其蛋白酶活性
Sara Benedé1, Leticia Pérez-Rodríguez1, David Menchén-Martínez1
1Instituto de Investigación en Ciencias de la Alimentación (CIAL), CSIC-UAM, Madrid, Spain.
Frontiers in immunology
|February 4, 2025
概括
摄入家用粉尘虫 (HDM) 可以通过增强对蛋白蛋白的过敏反应来促进食物过敏. 不活化的HDM也促进了反应,这表明蛋白酶活性对于这种辅助效应并不必不可少.
科学领域:
- 免疫学 免疫学 免疫学
- 过敏研究 研究过敏
- 胃肠病学 胃肠病学
背景情况:
- 众所周知,暴露于家尘虫 (HDM) 会导致组织损伤并激活天生的免疫力.
- 在促进胃肠道敏感性和食物蛋白质过敏性方面,HDM在促进胃肠道敏感性和食物蛋白质过敏性的作用是不太了解的.
研究的目的:
- 研究HDM对小鼠口腔对卵白 (EW) 敏感化的免疫刺激作用.
- 评估HDM蛋白酶活性对其使用非活化HDM (iHDM) 的辅助潜力的贡献.
主要方法:
- 在没有辅助剂的情况下对EW进行口腔敏感化的小鼠模型.
- 管理HDM和蛋白质过敏无活化HDM (iHDM).
- 对过敏反应的分析,包括巨细胞脱粒化,IgE/IgG1抗体的产生,基因表达和Th2反应.
主要成果:
- HDM和iHDM都增强了对EW的口腔过敏反应,通过肠道巨细胞脱粒表示.
- 只有iHDM诱导可检测血清EW特异性IgE和IgG1.
- HDM比iHDM增加了肠道紧结蛋白和警报基因表达,但对辅助作用不需要蛋白酶活性,因为iHDM促进了Th2反应.
结论:
- 摄入环境灰尘,如HDM,可能有助于食物过敏的发展.
- HDM在肠道中的辅助活性是复杂的,并且取决于情境,蛋白酶活性并不绝对必要.
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