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LILRA5 功能诱导 ROS 生产在天生的免疫细胞上

Zuyi Fu¹, Matevž Rumpret¹, Irina Kube-Golovin²

¹Department of Infectious Diseases, Centre for Bacterial Resistance Biology, Section of Molecular Microbiology, Imperial College London, London, UK.

European journal of immunology

|October 21, 2025

概括

白细胞免疫球蛋白类受体A5 (LILRA5) 是细胞上的激活受体,可刺激ROS的产生. 它的表达在有系统性感染的患者中是动态的和改变的,这表明它在免疫反应中的作用.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
分子生物学分子生物学

背景情况:

细胞上的免疫受体对于杀死微生物至关重要.
白血球免疫球蛋白类受体A5 (LILRA5) 是人类细胞上的孤儿受体,特征不佳.
LILRA5与FcRγ共定位.

研究的目的:

描述LILRA的功能和调节5.
研究LILRA5在免疫反应中的作用,特别是在感染和败血症中.

主要方法:

开发一种特定的激动性抗LILRA5单克隆抗体.
对单细胞和中性粒细胞LILRA5表达的分析.
在LILRA5结合时测量ROS产量.
在患有败血症和全身感染的患者中评估LILRA5水平.
通过LPS刺激和其脱落来研究LILRA5调节.

主要成果:

LILRA5在原始单细胞和中性粒细胞上表达,并在结合后刺激ROS的产生.
在败血症患者中观察到LILRA5转录和可溶性LILRA5 (sLILRA5) 的增加.
LPS刺激动态改变了LILRA5表达的表面表达,这表明了转录后调节.
LILRA5的泄露有助于溶解的形式,并调节表面表达.
变化的表面LILRA5表达会影响ROS生产能力.

结论:

LILRA5是细胞上的动态调节的激活受体.
LILRA5的激活刺激了ROS的产生,这是一个关键的杀菌机制.
通过分泌和动态表达来调节LILRA5,这表明它在感染期间调节免疫反应中发挥了作用.

关键词:

在LILRA5中,LILRA5是第五个.激活接收器的接收器感染的感染感染.有活性氧物种的反应性氧物种.这是一种血症.

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