系统性细胞因子驱动在细菌和病毒感染中保存的严重程度相关的髓质反应
Kimberly Kajihara1, Donghong Yan2, Gretchen L Seim1
1Department of Infectious Diseases, Genentech, South San Francisco, CA, USA.
Communications biology
|July 23, 2025
概括
严重的感染引发紧急骨髓形成 (EM),其特征是IL1R2+骨髓细胞增加. 颗粒细胞殖民地刺激因子 (G-CSF) 和干白素-6 (IL-6) 协同驱动这种反应,将髓状细胞失调与器官损伤联系起来.
科学领域:
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
- 基因组学就是基因组学.
背景情况:
- 细菌和病毒感染可能导致严重的宿主反应,导致免疫病理学和器官功能障碍.
- 在细菌性败血症和COVID-19中观察到失调的髓状细胞状态,但它们在其他病毒感染和组织损伤中的作用尚不清楚.
- 紧急骨髓形成 (EM) 和单细胞和中性粒细胞中IL1R2表达的增加与败血症和COVID-19严重程度有关.
研究的目的:
- 为了研究在不同严重感染中保存的髓状细胞特征.
- 为了确定驱动紧急骨髓形成 (EM) 和IL1R2在骨髓细胞中的表达的因素.
- 阐明骨髓组织失调在感染引起的组织损伤中的作用.
主要方法:
- 从25项研究中对1845名患者的单细胞和批量转录组数据进行了多队列分析.
- 进行元分析以确定保存的严重性相关基因特征.
- 对托西利祖马布治疗的COVID-19患者进行分析,以评估IL-6信号封锁效应.
- 在体内验证使用鼠标模型的流感感染与细胞因子阻塞.
主要成果:
- 在细菌性败血症,COVID-19和流感中发现了一种保存的严重性相关基因特征,表明紧急骨髓形成 (EM) 和单细胞和中性粒细胞中IL1R2表达的增加.
- IL-6信号封锁部分减少了这一签名,G-CSF的补偿增加.
- 结合IL-6和G-CSF阻塞在小鼠流感模型中抑制了与严重性相关的IL1R2+髓状细胞的产生.
结论:
- 颗粒细胞殖民地刺激因子 (G-CSF) 和干白素-6 (IL-6) 协同驱动与严重感染相关的IL1R2+髓状细胞的产生.
- 骨髓细胞失调,特别是IL1R2+单细胞和中性粒细胞的出现,与严重感染期间的组织损伤有关.
- 了解这些机制为管理严重传染病提供了潜在的治疗点.
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