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在病毒感染中,内皮AHR活动可以防止肺屏障的破坏
Jack Major1,2, Stefania Crotta3, Katja Finsterbusch3
1Immunoregulation Laboratory, Francis Crick Institute, London, UK. jack.major@nyulangone.org.
肺内皮细胞中的基碳水化合物受体 (AHR) 能防止流感引起的肺损伤和二次感染. 饮食中的AHR配体维持了这种保护功能,突出显示了呼吸系统疾病中的肠肺轴.
科学领域:
- 免疫学
- 细胞生物学
- 呼吸系统医学
背景情况:
- 呼吸道病毒感染会破坏肺内皮膜屏障,损害气体交换并加剧组织损伤.
- 肺内皮对宿主抗病毒病原体的作用尚不清楚.
研究的目的:
- 调查肺内皮细胞中亚利碳水化合物受体 (AHR) 在预防流感引起的肺血管泄漏和损伤方面的作用.
- 阐明内皮细胞的AHR信号影响组织保护和宿主对二次感染的易感性的机制.
主要方法:
- 使用具有内皮特异性AHR缺失的小鼠模型.
- 评估肺血管泄漏,免疫细胞透和上皮细胞反应.
- 研究了AHR介导的转录网络,包括apelin-APJ系统.
- 研究了饮食中的AHR配体对肺内皮功能和疾病结果的影响.
主要成果:
- 在流感感染期间,内皮AHR的损失加剧了肺损伤,增加了血管泄漏,并促进了免疫细胞的透.
- 内皮AHR缺陷增加了对二次细菌感染的易感性.
- 肺内皮质中的AHR信号阻止了异常的上皮细胞反应,并保持了屏障完整性.
- 流感感染抑制了保护性AHR信号;饮食中的AHR配体恢复了其功能,促进了疾病耐受性.
结论:
- 细胞内膜AHR对肺屏障免疫和对病毒诱导的损伤和二次感染的保护至关重要.
- 由饮食中的AHR配体影响的肠肺轴在调节肺损伤和疾病结果方面发挥着重要作用.
- 通过饮食维持内皮细胞功能对于预防严重的呼吸系统疾病至关重要.
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