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膜上皮细胞塑造了脂多糖诱导的炎症反应和膜巨细胞的重编程

Wei Jiang^1,2, Yeying Chen¹, Cheng-Yun Yu¹

¹Department of Immunology, School of Basic Medical Sciences, Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People's Hospital, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China.

European journal of immunology

|November 5, 2024

概括

膜上皮细胞 (AECs) 增强膜巨细胞 (AM) 对细菌感染的免疫反应. 这种相互作用增强了宿主抵抗力,防止了内毒素耐受性,并促进了肺部的先天免疫力.

科学领域:

免疫学免疫学免疫学
肺部医学肺部医学
微生物学微生物学

背景情况:

膜巨细胞 (AMs) 是肺部的关键免疫细胞,感知病原体.
与其他巨细胞不同,AMs通常抵抗内毒素耐受性,这表明微环境的影响.
膜上皮细胞 (AEC) 在调节对感染的AM反应中的作用尚不清楚.

研究的目的:

调查AEC如何影响AM对传染病原体的先天免疫反应.
为了确定AEC是否影响AM内毒素耐受性.
阐明AECs调节AM功能的机制.

主要方法:

通过鼻内灌注,小鼠暴露于脂多糖 (LPS).
评估了AM反应,细胞活性和杀菌能力.
在体外研究中检查了LPS刺激的AEC及其对AMs的影响.
分析了细胞因子的产生 (TNF-α,GM-CSF).

主要成果:

渴望的LPS暴露增强了对TLR激动剂的AM反应,并在小鼠中增加了细胞/杀菌活性.
在LPS预暴露后,至少在35天内对格拉姆阴性细菌感染产生了耐药性.
由LPS刺激的AEC增强了AM的先天免疫反应,并防止了体外耐受性.
确定了一个积极的反循环:由AM衍生的TNF-α诱导的AEC释放GM-CSF,进一步增强AM反应.

结论:

AECs在促进AM先天性免疫反应方面发挥着至关重要的作用.
AECs防止AMs发展内毒素耐受性.
这种AEC-AM相互作用增强了宿主对肺部感染的抵抗力.

关键词:

膜上皮细胞 (AECs) 是一种膜上皮细胞.膜细胞巨细胞 (AMs) 是一个颗粒细胞-巨细胞殖民地刺激因子 (GM-CSF)大细胞重编程的重编程

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