缺少CD146促进了肺部密码球菌病的2型炎症反应
Zhengxia Wang1, Wei Liu2, Huidi Hu3
1Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
Medical microbiology and immunology
|August 31, 2023
概括
加密球菌新型人感染减少了CD146的表达,使肺部加密球菌病恶化. 免疫细胞中CD146缺乏会加剧炎症和真菌负担.
科学领域:
- 免疫学 免疫学 免疫学
- 菌类学 菌类学是指菌类学.
- 病原体与宿主相互作用
背景情况:
- 新型菌 (Cryptococcus neoformans) 是一种重要的机会性真菌病原体,引起肺部感染.
- 之前的研究发现CD146是C. neoformans粘附于气道上皮的调解者.
- CD146在肺部密码球菌病期间的炎症反应中的作用仍然未被探索.
研究的目的:
- 为了研究CD146在肺部密码菌病的炎症反应中的功能.
- 为了确定CD146减少对C. neoformans感染的严重程度的影响.
主要方法:
- 对来自人类患者和感染小鼠的肺组织中CD146表达的分析.
- 使用CD146淘汰赛 (KO) 小鼠和骨髓模拟小鼠进行感染研究.
- 评估真菌负担,生存率,细胞因子概况,巨细胞激活和化学因子的产生.
主要成果:
- 在C. neoformans感染期间,肺组织中CD146的表达减少.
- 缺少CD146会加剧感染,导致真菌负荷增加和生存率降低.
- CD146 KO小鼠表现出2型炎性细胞因子 (IL-4,IL-5,TNF-α) 和替代激活的巨细胞的增加.
- 免疫细胞中的CD146缺乏,而不是非免疫细胞,增加了肺部真菌负担.
- 缺乏CD146的巨细胞产生了更多的KC和TNF-α,其杀菌活性和ROS产量减少.
结论:
- 新型冠状病毒感染会降低肺部CD146的调节,从而导致2型炎症反应.
- CD146在控制C. neoformans感染方面发挥着关键的保护作用,特别是通过免疫细胞.
- CD146的损失通过损害巨细胞的功能和促进炎症,加剧了肺部密码球菌病.
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