伪菌 (Pseudomonas aeruginosa) 的肺部感染导致S100A8/A9依赖的心脏功能障碍
Naresh Kumar1, Matthew J Pestrak1, Qian Wu1
1Department of Microbial Infection and Immunity, College of Medicine, The Ohio State University, Wexner Medical Center, Columbus, Ohio, United States of America.
PLoS pathogens
|August 25, 2023
概括
伪菌的肺部感染会通过炎症途径引起心脏功能障碍. 虽然S100A8/A9限制了细菌的生长,但缺少它会使心脏问题和肺炎死亡率恶化.
科学领域:
- 传染性疾病 传染性疾病
- 心脏病学 心脏病学
- 免疫学 免疫学 免疫学
背景情况:
- 伪菌 (Pseudomonas aeruginosa,简称P.A.) 是一种病毒. 是医院获得的肺炎的主要原因,死亡率高.
- 这就是P.A.A. 感染引发炎症,这可能导致心脏功能障碍.
- 连接P.a.的精确机制. 肺部感染与心脏功能障碍的关系尚不清楚.
研究的目的:
- 调查P.a.的机制. 肺部感染导致心脏功能障碍.
- 阐明S100A8/A9和相关信号通路在这个过程中的作用.
主要方法:
- 一个小鼠模型的PA. 使用了肺炎.
- 评估了心脏功能,电活动和炎症标志物.
- 评估了S100A8/A9删除对感染结果的影响.
主要成果:
- 这就是P.A.A. 在小鼠中,肺部感染诱导了严重的左心室功能障碍和电气异常.
- 中性粒细胞的招募和S100A8/A9释放激活了TLR4/RAGE信号,促进了全身炎症和心脏功能障碍.
- 全球删除S100A8/A9加剧了由于增加的细菌负担而导致的心脏功能障碍和死亡率.
结论:
- 这就是P.A.A. 感染引发复杂的炎症反应,影响心脏功能.
- S100A8/A9具有双重作用,缓解细菌的传播,同时有助于心脏功能障碍的风险.
- 针对S100A8/A9或相关途径可能为P.a.提供治疗潜力. 肺炎引起的心脏并发症.
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