自然杀手细胞效应因子功能对于宿主防御与酒精相关的细菌性肺炎至关重要
Daniel N Villageliu1, Kelly C Cunningham1, Deandra R Smith2
1Department of Internal Medicine, Division of Pulmonary, Critical Care, & Sleep, University of Nebraska Medical Center, Omaha, NE, USA.
NPJ biofilms and microbiomes
|September 3, 2024
概括
酒精会损害自然杀手 (NK) 细胞的功能和招募,增加对细菌性肺炎的易感性. 醇补充剂可以通过醇碳化合物受体 (AhR) 信号恢复NK细胞活性.
科学领域:
- 免疫学 免疫学 免疫学
- 肺部病理学 肺部病理学
- 毒理学 毒理学 毒理学
背景情况:
- 饮酒是细菌性肺炎的一个重要危险因素.
- 酒精会损害天生的免疫细胞功能,包括自然杀手 (NK) 细胞活动和招募.
- 在酒精相关肺炎中NK细胞的具体作用尚不清楚.
研究的目的:
- 为了研究内和NK细胞在对酒精相关细菌肺炎的宿主防御中的作用和相互作用.
- 确定酒精如何影响NK细胞效应器功能和肺部招募.
- 探索酒精对NK细胞影响的信号通路.
主要方法:
- 使用了长期饮酒过度养的小鼠模型.
- 评估NK细胞对克莱布西拉肺炎的细胞分解活性.
- 分析了NK细胞对各种化学因子 (CXCR3,CCR2,CXCR4,CX3CR1) 的迁移反应.
- 研究了转化生长因子β (TGF-β) 和酸受体 (AhR) 信号通路的参与.
主要成果:
- 酒精消费降低了NK细胞杀死Klebsiella pneumoniae的能力.
- 酒精调节了NK细胞的招募,显示了针对特定化学因子的改变迁移模式.
- 酒精增加了转化生长因子β (TGF-β) 信号传递,同时抑制了NK细胞中的酸受体 (AhR) 信号传递.
- 醇补充剂减轻了酒精诱导的NK细胞招募障碍,这取决于AhR信号.
结论:
- 酒精会破坏NK细胞特异性的TGF-β和AhR信号通路.
- 这些干扰导致NK细胞肺部招募和细胞分解活性降低.
- 这种损伤增加了与酒精相关的细菌性肺炎的易感性.
- 通过调节这些通路并恢复NK细胞功能,Indole可能提供一种治疗策略.
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