流感病毒诱导的I型干扰素会破坏发育中的肺部中膜上皮的修复和紧密结合的完整性
Abigail P Onufer1, Joshua Chang Mell1, Laura Cort1
1Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA, United States.
Mucosal immunology
|February 21, 2025
概括
干扰素I (IFN-I) 信号破坏了感染甲型流感病毒 (IAV) 的发育小鼠的肺部修复. 阻断IFN-I改善了新生儿的生存率和肺障碍完整性,与成人反应相反.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 肺部病理学 肺部病理学
背景情况:
- 甲型流感病毒 (IAV) 感染呈现出不同的年龄特异性病原体.
- 在IAV感染后,缺乏功能性INTERFERON-I受体 (IFNAR-/-) 的新生小鼠与野生型 (WT) 新生小鼠相比,显示出更好的生存率和减少的肺病理.
- 成人IFNAR-/-小鼠在IAV感染后患病率增加,与WT成年人相比.
研究的目的:
- 研究IAV诱导的IFN-I信号在初级新生儿II型膜上皮细胞 (TIIECs) 中的作用.
- 了解IFN-I信号如何促进发育中的肺部年龄特定的病毒病原发生.
主要方法:
- 从IAV感染和WT新生儿的净化TIIEC的多因素转录分析.
- 途径分析以确定IFNAR-/-新生儿中的上调基因.
- 针对性分析修复基因表达和免疫光定量ZO-1和ocludin在感染后的2天和6天 (dpi).
主要成果:
- 年龄,而不是感染状况,是TIIEC中转录差异的主要驱动因素.
- 艾滋病病毒感染的IFNAR-/-新生儿显著上调细胞增殖,组织修复和紧结基因2dpi.
- 与WT新生儿相比,IFNAR-/-新生儿在6dpi时显示出更高的全肺封闭素染色和修复基因表达.
结论:
- 在发育中的肺部中,IFN-I信号是致病的.
- 在新生儿的IAV感染期间,IFN-I信号破坏了膜修复和肺屏障完整性.
- 阻止IFN-I信号传递可能是新生儿流感感染的治疗策略.
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