1型糖尿病对免疫反应的破坏加剧了SARS-CoV-2介导的肺损伤
Sara Kass-Gergi1,2,3,4, Gan Zhao1,2,3, Joanna Wong1,2,3
1Department of Biomedical Sciences, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States.
American journal of physiology. Lung cellular and molecular physiology
|September 25, 2024
概括
1型糖尿病在小鼠中加剧了COVID-19肺炎的严重程度. 糖尿病小鼠的肺部损伤增加,免疫反应受损,T细胞招募减少,以及炎症性巨细胞,突出显示T1DM是关键的并发症.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 病理学 病理学 病理学
背景情况:
- COVID-19通常会引起肺炎,其严重程度受到伴随疾病的影响.
- 1型糖尿病 (T1DM) 是一种影响传染病结果的重要并发症.
研究的目的:
- 在小鼠模型中调查药理学诱导的T1DM对COVID-19肺炎严重性的影响.
- 阐明SARS-CoV-2感染的糖尿病小鼠中严重肺损伤的基础免疫机制.
主要方法:
- 利用适应小鼠的SARS-CoV-2模型在野生型小鼠中诱导COVID-19肺炎.
- 在小鼠的一个子集中用药物诱导T1DM创建高血糖队列.
- 采用转录组分析,单细胞RNA测序 (scRNA-Seq) 和流细胞测量用于免疫细胞分析.
- 适应了一种新的组织消化技术,用于固定组织的流动细胞计分析.
主要成果:
- 糖尿病小鼠的体重减轻增加,血液中氧气和降低,表明肺部受伤更严重.
- 转录组分析显示,糖尿病小鼠的肺部适应性免疫反应受损.
- scRNA-Seq和流细胞测量证实T细胞招募减少,并在T1DM小鼠中确定了一种促炎性巨形状.
- 新的组织分析技术成功地在高度固定的样本上实现了流动细胞计分析.
结论:
- 在小鼠中,T1DM显著加剧了COVID-19肺炎的严重程度,其特征是肺部损伤增加和免疫反应受损.
- 损伤的T细胞透和明显的炎症性巨细胞表型有助于糖尿病COVID-19模型中的疾病恶化.
- 开发的组织分析方法扩大了在有限的环境中研究复杂病理的能力.
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