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在未成熟的小鼠中,鼻病毒诱导的喘表型需要细胞
Yiran Li1, Mingyuan Han1, Shilpi Singh1
1Department of Pediatrics.
JCI insight
|December 7, 2023
概括
气道细胞通过产生IL-25激活免疫细胞,在年轻小鼠中驱动犀牛病毒诱导的喘. 这一发现揭示了一种机制,将早期病毒感染与以后的过敏呼吸道疾病联系起来.
科学领域:
- 免疫学 免疫学 免疫学
- 呼吸系统医学 呼吸系统医学
- 发育生物学 发展生物学
背景情况:
- 在未成熟的小鼠中,犀牛病毒 (RV) 感染会导致一种类似喘的表型.
- 这种表型涉及2型炎症,粘膜转化和呼吸道过敏反应.
- 介质素-25 (IL-25) 和2型先天性淋巴细胞 (ILC2s) 对这种反应至关重要.
研究的目的:
- 为了研究双丁类激酶1-阳性 (DCLK1+) 细胞在RV诱导的喘中的作用.
- 为了确定状细胞是否对于未成熟小鼠中喘表型的发展至关重要.
- 为了检查Pou2f3缺乏的影响,一个关键的转录因子为状细胞的发展,在RV感染的结果.
主要方法:
- 不同年龄的未成熟C57BL/6J小鼠感染了犀牛病毒血清型RV-A1B和RV-A2.
- 在气道中分析DCLK1+状细胞群.
- 对RV感染的野生类型小鼠与Pou2f3淘汰 (Pou2f3-/-) 小鼠进行比较,评估IL-25表达,ILC2扩张,II型细胞因子,粘膜转化,乙素计数和呼吸道反应.
主要成果:
- 在未成熟小鼠的大气道中,RV感染增加了DCLK1+状细胞.
- 在RV感染后,Pou2f3-/-小鼠的IL-25 mRNA和蛋白质水平与野生类型对照相比降低.
- 感染RV的Pou2f3-/-小鼠显示ILC2扩张显著降低,2型细胞因子表达,粘膜转化,肺异osinophils和气道过敏反应.
结论:
- 在未成熟小鼠重复感染RV后,气道细胞对于喘样表型的发展是不可或缺的.
- 由RV诱导的细胞增殖和IL-25产生是将早期病毒感染与2型炎症反应的强化联系起来的关键机制.
- 这项研究强调了状细胞作为了解和潜在治疗生命早期病毒引起的喘恶化症的关键细胞标.
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