鼻病毒感染通过B细胞依赖的炎症单细胞的招募诱导喘恶化
Kody A Waldstein1, Arman Issimov1, Maria Ganama1
1Department of Otolaryngology-Head and Neck Surgery, University of Iowa, Iowa City, Iowa, USA.
上呼吸道病毒感染 (URVI) 通过激活炎症单细胞,使喘恶化. 这项研究揭示了一个B细胞单细胞通路驱动这些恶化,提供了新的治疗点.
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
- 过敏研究 研究过敏
背景情况:
- 上呼吸道病毒感染 (URVI) 引发了80%的喘恶化.
- 在URVI引起的喘恶化背后的精确机制尚未完全理解.
研究的目的:
- 调查URVI对喘表型的影响,并阐明潜在机制.
- 确定关键的细胞参与者和参与URVI恶化喘的信号通路.
主要方法:
- 使用了URVI的小鼠模型,特别是鼻受限呼吸道同胞病毒 (RSV) 感染.
- 在肺部检查了呼吸道过敏反应 (AHR),炎症细胞招募 (单细胞,B细胞) 和化学激素表达 (CCL2,CCL7) 的变化.
- 使用B细胞缺乏的小鼠和CCR2淘汰的小鼠来评估特定细胞类型和信号通路的作用.
主要成果:
- 鼻腔RSV感染单独导致轻微的鼻腔炎症,但显著增强了TH2/TH17反应和AHR在小鼠与家尘引发的喘.
- 在URVI后观察到Ly6C+炎症单细胞 (IMs) 招募到肺部,与增加的CCL2和CCL7表达相关.
- 在IM枯竭的小鼠和CCR2-/-小鼠中,URVI诱导的AHR被废除,突出显示了IMs的关键作用.
- 招募IMs取决于B细胞,RSV感染增加了肺部CCL2+CCL7+B细胞的数量.
结论:
- 通过涉及B细胞和单细胞的调节轴,URVI会加剧过敏气道炎症和AHR.
- 这种B细胞-单细胞相互作用代表了一种新的机制,有助于病毒诱导的喘恶化.
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