甲型流感诱发的囊性纤维化,膜传导性调节器功能障碍增加了对Streptococcus pneumoniae的易感性
Erin Y Earnhardt1, Jennifer L Tipper1, Adonis D'Mello2
1Department of Anesthesiology and Perioperative Medicine, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.
JCI insight
|June 15, 2023
概括
流感A病毒感染通过降低囊性纤维化跨膜导电性调节器 (CFTR) 功能来损害呼吸道防御,增加对二次细菌性肺炎的易感性. 这突显了肺上皮在病毒感染期间宿主防御中的关键作用.
科学领域:
- 肺部病理学 肺部病理学
- 病毒学 病毒学
- 微生物学 微生物学
背景情况:
- 流感A型病毒 (IAV) 感染往往导致严重的二次细菌感染,增加患者的死亡率.
- IAV破坏了呼吸道平静,导致类似于囊性纤维化病理,由于囊性纤维化转膜导电调节器 (CFTR) 功能受损.
研究的目的:
- 调查IAV感染如何改变呼吸道微环境,增加对二次性肺炎链球菌 (Spn) 感染的易感性.
- 阐明CFTR功能障碍和气道上皮质变化在IAV诱导的二次细菌易感性中的作用.
主要方法:
- 利用人类呼吸道器官类型培养物来模拟IAV感染和随后的SPN挑战.
- 在IAV感染后,分析了呼吸道表皮和表面液体的转录和蛋白质变化.
主要成果:
- 由IAV引起的CFTR功能障碍和气道表面液体酸化被确定为增加SPN易感性的关键因素.
- IAV感染引发了呼吸道中显著的转录和蛋白质基因变化,影响了宿主防御通路.
- 无论是依赖CFTR的还是独立的机制,都对观察到的气道上皮功能和防御的变化作出了贡献.
结论:
- 在IAV之后,CFTR功能对维持呼吸道防御以抵抗二次细菌感染至关重要.
- 肺上皮在IAV后的二次细菌感染期间在宿主防御机制中发挥着核心作用.
- 了解这些机制可以为减轻与复杂流感感染相关的发病率和死亡率的策略提供信息.
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