在流感A感染期间,抗ST2抗体减少了由单细胞衍生巨细胞介导的呼吸道过敏反应
Rohin Chakraborty1, Julia Chronopoulos1, Rui Sun1
1Meakins-Christie Laboratories, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.
Mucosal immunology
|May 4, 2025
概括
流感病毒感染导致呼吸道过敏反应. 用抗ST2抗体向IL-33受体复合体,通过减少单细胞衍生的巨细胞,独立于IL-13来减少这种反应,从而减少了这种反应.
科学领域:
- 免疫学 免疫学 免疫学
- 呼吸系统医学 呼吸系统医学
- 病毒学 病毒学
背景情况:
- 众所周知,A型流感病毒 (IAV) 感染会加剧喘并诱导呼吸道过敏反应 (AHR).
- 在IAV诱导的AHR背后的精确机制尚未完全理解.
- 介素-33 (IL-33) 和它的受体ST2 (抑制瘤性2) 在过敏呼吸道炎症中起作用.
研究的目的:
- 阐明IAV感染诱导AHR的机制.
- 研究IL-33/ST2通路在IAV诱导的AHR中的作用.
- 为了确定特定的免疫细胞种群参与IAV诱导的AHR.
主要方法:
- 在急性IAV感染期间在C57BL/6小鼠中用抗ST2抗体治疗.
- 对ILC2扩张和IL-13水平的分析.
- 评估单细胞衍生巨细胞 (MM) 种群,并使用CCR2-淘汰赛小鼠和抗Ly6C抗体进行招募.
- 在体外研究中,使用来自IL-33处理的巨细胞在气道光滑肌肉 (ASM) 细胞上的条件介质.
主要成果:
- 反ST2抗体治疗减少了IAV感染小鼠的AHR,独立于ILC2扩张和IL-13.
- 反-ST2抗体选择性地减少了肺中的单细胞衍生巨细胞 (MMs).
- 在CCR2-淘汰赛小鼠中,AHR降低了,这表明MM招募受损.
- MMs的耗尽也减少了AHR.
- 刺激IL-33的巨细胞释放了促进ASM收缩的调解剂.
结论:
- 单细胞衍生的巨细胞 (MMs) 通过依赖IL-33的方式在IAV感染后导致急性AHR.
- 这一贡献独立于ILC2/IL-13轴.
- 巨细胞的IL-33诱导媒介增强了气道光滑肌的收缩,提供了与IAV诱导的AHR的机械联系.
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