中性粒细胞介导的对细菌性肺炎的先天性免疫抵抗性取决于Tet2功能
Candice Quin1,2,3, Erica N DeJong1,2, Elina K Cook4
1Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.
The Journal of clinical investigation
|April 4, 2024
概括
克隆性血液形成 (CHIP) 增加了肺炎的风险. CHIP 损害了中性粒细胞的功能,损害了天生的免疫系统,增加了对肺炎等细菌感染的易感性.
科学领域:
- 免疫学 免疫学 免疫学
- 血液学 血液学 血液学
- 遗传学 遗传学 是一个
背景情况:
- 不确定潜力的克隆性血液形成 (CHIP) 与与衰老相关的疾病和死亡率有关.
- CHIP对感染风险,特别是细菌性肺炎的影响尚不清楚.
研究的目的:
- 调查CHIP和肺炎风险之间的关联.
- 阐明细菌性肺炎中CHIP相关免疫功能障碍的潜在机制.
主要方法:
- 分析英国生物库数据 (n=438,421) 以将CHIP与肺炎发病率相关联.
- 使用一个小鼠模型 (Tet2-/-小鼠) 受到Streptococcus pneumoniae的挑战.
- 来自Tet2-/-小鼠的中性粒细胞的转录造型和活体成像.
主要成果:
- CHIP与人类发生的肺炎有积极的关联.
- 2-/-小鼠表现出造血异常,中性粒细胞功能受损 (流动性,NET形成),以及对S. pneumoniae的易感性增加.
- 与炎症相关的通路得到了高调,而在Tet2-/-中性粒细胞中,迁移通路受到损害.
结论:
- CHIP是细菌性肺炎的一个危险因素.
- 与CHIP相关的先天性免疫损伤,特别是中性粒细胞功能,有助于增加肺炎易感性.
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