SARS-CoV-2 诱导中性粒细胞的脱粒化和分化为与严重的COVID-19相关的髓状细胞衍生的抑制细胞
Leon L Hsieh1,2, Elizabeth A Thompson2, Nirvani P Jairam1
1Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
Science translational medicine
|May 21, 2025
概括
严重的COVID-19涉及具有增加LOX-1表达的中性粒细胞,作为髓质衍生抑制细胞. SARS-CoV-2 直接激活中性粒细胞,促进免疫抑制,并建议PD-L1 抑制作为治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 严重的COVID-19表现出独特的免疫变化,包括中性粒细胞升高和淋巴细胞减少.
- 在住院COVID-19患者中观察到中性粒细胞脱粒化和莱克类氧化低密度脂蛋白受体-1 (LOX-1) 的表达增加.
- 中性粒细胞上的LOX-1标志着多态核核髓原抑制细胞 (PMN-MDSCs),与严重的疾病进展有关.
研究的目的:
- 调查组织损伤或炎症是否会在COVID-19中诱导PMN-MDSC.
- 要确定SARS-CoV-2是否直接激活中性粒细胞成为PMN-MDSCs.
- 探索在COVID-19中针对PMN-MDSC的治疗潜力.
主要方法:
- 用SARS-CoV-2化健康的人类中性粒细胞.
- 对中性粒细胞LOX-1和PD-L1表达的分析.
- 评估中性粒细胞诱导的T细胞抑制在体外.
主要成果:
- 在健康的中性粒细胞上,SARS-CoV-2迅速诱导LOX-1表面表达,独立于生产性感染.
- LOX-1诱导涉及颗粒细胞外和增加反应性氧物种,CD63和PD-L1表达.
- 在实验室中,LOX-1+中性粒细胞抑制了T细胞自主增殖.
结论:
- SARS-CoV-2 直接激活中性粒细胞成为PMN-MDSC,从而导致严重的COVID-19 病原体.
- 在急性SARS-CoV-2感染期间,PMN-MDSCs在调解免疫反应方面发挥着重要作用.
- 在中性粒细胞上抑制PD-L1是一种潜在的治疗策略,用于严重的COVID-19.
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