富含血小板的中性粒细胞-血小板聚合物的肺微血管封闭促进了香烟烟雾引起的严重流感
Tomasz W Kaminski1,2, Tomasz Brzoska2,3, Xiuying Li4
1Thrombosis and Hemostasis Program, VERSITI Blood Research Institute, Milwaukee, Wisconsin, USA.
JCI insight
|December 7, 2023
概括
暴露于香烟烟雾 (CS) 恶化了流感,导致严重的肺损伤. 富含血小板的中性粒细胞-血小板聚合物 (NPA) 在肺部形成,阻断血液流动,导致小鼠急性呼吸功能障碍.
科学领域:
- 肺部医学 肺部医学
- 免疫学 免疫学 免疫学
- 毒理学 毒理学 毒理学
背景情况:
- 吸烟 (CS) 与严重的流感结局和ICU入院有关.
- 通过CS加剧流感病毒感染的确切机制尚不清楚.
研究的目的:
- 调查CS诱导的流感恶化的病因机制.
- 阐明血小板激活和聚合在CS恶化呼吸道疾病中的作用.
主要方法:
- 预先将小鼠暴露在香烟烟雾 (CS) 或室内空气中4周.
- 随后,小鼠被感染了轻量级的流感A病毒.
- 实时静脉肺成像用于观察微循环事件.
主要成果:
- 暴露于CS的小鼠在流感感染后出现严重的肺损伤,与对照群不同.
- 在2天内,在肺微血管中观察到富含血小板的中性粒细胞-血小板聚合物 (NPA) 的积累.
- NPAs阻塞了微血管,导致肺缺血症,血管泄漏和气囊透.
结论:
- 在感染甲型流感病毒后,CS暴露使肺部为严重损伤做好了准备.
- 血小板驱动的血栓炎症,以NPA形成和微血管封闭为特征,是CS加剧流感的关键机制.
- 这些发现强调了一种新的途径,该途径有助于在感染流感的吸烟者中导致严重的呼吸道结果.
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