细胞增殖细胞核抗原 (PCNA) 在COVID-19中调节中性粒细胞过活化
Rodrigo de Oliveira Formiga1,2,3, Lucie Pesenti1,2, François Chable de la Héronnière1,2
1Université Paris Cité, CNRS UMR 8104, Inserm U1016, Paris 75014, France.
概括
中性粒细胞中细胞分裂细胞核抗原 (PCNA) 的升高导致严重的COVID-19炎症. 用T2AA抑制PCNA可减少活性氧物种 (ROS) 和中性粒细胞外细胞陷 (NET) 的形成,提供一种潜在的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 中性粒细胞在严重的SARS-CoV-2感染中观察到的高炎症反应中发挥着关键作用.
- 在重症和危急COVID-19患者的中性粒细胞中观察到增殖细胞核抗原 (PCNA) 的细胞质水平升高.
研究的目的:
- 为了调查PCNA在COVID-19期间中性粒细胞过活化中的作用.
- 探索PCNA抑制作为COVID-19相关炎症治疗策略的潜力.
主要方法:
- 从COVID-19患者的中性粒细胞中量化细胞质PCNA水平.
- 评估NADPH氧化酶依赖的ROS生成和中性粒细胞外细胞陷 (NET) 的形成.
- 利用T2AA,PCNA的小分子抑制剂,以评估其对中性粒细胞激活的影响.
- 使用生物化学测试研究PCNA和S100A8/S100A9 (calprotectin) 之间的相互作用.
- 使用贝塔冠状病毒小鼠模型来评估T2AA治疗的体内疗效.
主要成果:
- 中性粒细胞中细胞质PCNA水平升高与严重COVID-19患者的ROS生成和NET形成增加相关.
- T2AA治疗显著抑制了NADPH氧化酶激活和NET释放,特别是在对SARS-CoV-2RNA的反应中.
- 确定了PCNA和S100A8/S100A9复合体 (calprotectin) 之间的新型相互作用,调节中性粒细胞激活.
- T2AA以S100A8/S100A9依赖的方式抑制了ROS的产生.
- 在体内,T2AA治疗降低了肺炎,NETs和calprotectin水平,在小鼠模型中促进了向免疫解决的转变.
结论:
- 在COVID-19期间,细胞质PCNA充当中性粒细胞过活化的中心支架.
- 通过T2AA对PCNA的药理学干扰代表了一种有希望的宿主导治疗策略,以减轻严重的COVID-19中炎症和预防器官损伤.
- PCNA和calprotectin之间的相互作用是中性粒细胞激活的关键机制,也是潜在的治疗点.
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