在急性SARS-CoV-2感染中,IL-33/ST2信号轴驱动病原体
bioRxiv : the preprint server for biology
|December 9, 2024
概括
阻止IL-33/ST2通路显著改善了COVID-19小鼠模型中的结果. 这表明,准IL-33/ST2信号可能是治疗2019年冠状病毒严重疾病 (COVID-19) 的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 传染病的发病原因 传染病的发病原因
背景情况:
- 严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 导致COVID-19,导致全球重大健康问题.
- 免疫病理损伤有助于严重的COVID-19症状,如肺炎,ARDS和多器官衰竭.
- 2型细胞因子IL-13与COVID-19严重程度的增加有关,这表明驱动2型免疫力的上游途径至关重要.
研究的目的:
- 研究IL-33/ST2信号轴的作用,这是2型免疫的关键诱导因子,在COVID-19的小鼠模型中.
- 确定抑制IL-33/ST2信号是否可以减轻疾病严重程度并改善SARS-CoV-2感染小鼠的存活率.
主要方法:
- 使用了一种适应小鼠的SARS-CoV-2 MA10感染模型.
- 在ST2淘汰赛 (ST2-/-) 小鼠和野生型小鼠中比较疾病结局.
- 给受感染的小鼠用HpBARI_Hom2,一种阻断IL-33/ST2信号传递的虫衍生的蛋白质,并将其与对照治疗的小鼠进行比较.
主要成果:
- 与野生型小鼠相比,ST2-/-小鼠的体重减轻显著,生存率有所提高.
- 使用HpBARI_Hom2对IL-33/ST2信号的药理学阻断也导致显著改善体重减轻和生存率.
- 独立于病毒载量减少观察到保护,这表明IL-33/ST2信号传递具有免疫病原作用.
结论:
- IL-33/ST2信号轴加剧了COVID-19疾病的严重程度.
- 针对IL-33/ST2信号提供了一个潜在的治疗策略,用于严重的COVID-19.
- 通过增强2型免疫反应,例如IL-5的产生,IL-33/ST2信号可能会驱动严重的疾病.
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