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老年仓鼠的呼吸道长期COVID特征是运动后肺功能受损,有支气管和纤维化
Laura Heydemann1, Małgorzata Ciurkiewicz1, Theresa Störk1
1Department of Pathology, University of Veterinary Medicine Foundation, Hanover, Germany.
Nature communications
|February 28, 2025
概括
长期的COVID会损害肺功能,并导致雄性仓鼠的持续性纤维化. 这种模型突出显示了肺部修复中的气道基底和俱乐部细胞,暗示了疾病风险因素.
科学领域:
- 肺部医学 肺部医学
- 病毒学 病毒学
- 再生医学是一种再生医学.
背景情况:
- 长期影响的SARS-CoV-2感染,或长期COVID,影响全球数百万人.
- 驱动长期COVID病理的精确机制在很大程度上是未知的.
- 动物模型对于理解SARS-CoV-2病原和开发干预措施至关重要.
研究的目的:
- 在雄性仓鼠模型中研究SARS-CoV-2Delta感染后的长期肺再生过程.
- 描述肺部变化和功能缺陷的时间动态,直到感染后112天 (dpi).
- 识别导致长期COVID中慢性肺部后果的细胞机制.
主要方法:
- 在SARS-CoV-2感染的雄性仓鼠中进行了形态,转录和功能评估的组合.
- 在感染后的不同时间点,评估休息和运动 (跑步机) 期间的肺功能.
- 组织病理学分析以确定肺组织中的纤维变化和细胞群.
主要成果:
- SARS-CoV-2 感染导致严重的急性肺功能障碍.
- 慢性肺纤维化和气泡支气管支气管化持续至112dpi.
- 气道基底细胞CK14+和SCGB1A1+俱乐部细胞填充了支气管形成的区域,表达了增殖标志物.
结论:
- 雄性仓鼠模型复制了人类长期COVID中出现的关键肺纤维化变化.
- 持续性肺纤维化和特定的细胞变化可能是长期COVID幸存者未来疾病的风险因素.
- 需要进一步的研究来阐明这些细胞群在长期呼吸系统健康中的作用.
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