在年轻小鼠中,红状腺原始体通过清理IL-33抑制过敏喘
Chang Li1, Jie Liu1,2, Xiaoshi Li1
1Department of Biochemistry, Key University Laboratory of Metabolism and Health of Guangdong, Joint Laboratory of Guangdong-Hong Kong Universities for Vascular Homeostasis and Diseases, SUSTech Homeostatic Medicine Institute, School of Medicine, Southern University of Science and Technology, Shenzhen, China.
早期的红色素原始体 (EPs) 吸收IL-33,防止严重的过敏喘. 这些ST2+EP对年轻小鼠的免疫平衡至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 过敏学 过敏学
- 发展生物学 发展生物学
背景情况:
- 介素-33 (IL-33) /ST2信号与成人喘有关.
- 对于IL-33在早发过敏性喘中的作用尚不清楚.
- 调查产后IL-33动态和由脏ST2+红色素原始体 (EPs) 调节至关重要.
研究的目的:
- 为了检查IL-33.3的产后发育变化.
- 确定ST2+ EPs在IL-33上的调节作用.
- 了解IL-33/ST2信号传递对早发过敏性喘的贡献.
主要方法:
- 在新生儿和年轻小鼠中测量了血IL-33水平.
- 使用野生型 (WT) 和Il33-/-小鼠暴露在家用灰尘虫 (HDM) 中,以模拟喘.
- 分析了ST2+EP的IL-33响应性,转录基因/表观基因特征和IL-33清除能力;进行了EP耗尽.
主要成果:
- 血IL-33在出生后第7天 (PND7) 达到峰值,并减少了PND28.
- 与Il33-/-小鼠相比,WT小鼠表现出更严重的HDM诱导的气道炎症.
- 在生命早期存在的ST2+ EPs有效地清除了IL-33,它们的耗尽加剧了HDM诱导的炎症,增加了Tfh和IgE+B细胞.
结论:
- 脏ST2+EPs在生命早期充当过渡性IL-33清洁者.
- EPs可以减轻IL-33的亲喘效应.
- 这些发现凸显了EP在维护免疫平衡和预防早发过敏喘方面的作用.
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