空气道上皮细胞和巨细胞触发IL-6-CD95/CD95L轴,并介导COVID-19的初始免疫病理
Thais F C Fraga-Silva1, Ualter G Cipriano2, Marcilio J Fumagalli2
1Department of Biochemistry and Immunology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo 14049-900, Brazil.
感染SARS-CoV-2会触发气道上皮细胞,激活CD95/CD95L通路. 这一途径驱动巨细胞功能障碍和炎症,表明CD95/CD95L作为严重COVID-19的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 病毒学 病毒学
背景情况:
- 感染SARS-CoV-2的气道上皮细胞 (AEC) 可能导致COVID-19中巨细胞功能障碍.
- 通过CD95/CD95L或间接IL-6信号的直接AEC-巨相互作用被假设驱动严重的急性炎症.
研究的目的:
- 研究CD95/CD95L和IL-6信号在SARS-CoV-2引起的巨细胞功能障碍和肺炎中的作用.
主要方法:
- 巨细胞与亡/感染AEC的共培养.
- 巨细胞暴露于气管吸附物或复合IL-6的暴露.
- 对巨细胞表面标记物 (CD95,CD163,HLA-DR) 和细胞因子生产 (IL-1β) 的分析.
- 在感染后对IL-6或CD95缺乏的小鼠的炎症评估.
主要成果:
- 与缩性/感染性AEC的相互作用增加了CD95和CD163的表达,并诱导了巨细胞死亡.
- 暴露IL-6降低了HLA-DR,增加了CD95和CD163,并促进了IL-1β的产生.
- CD95/CD95L和IL-6受体对抗剂逆转了IL-6的影响.
- 缺乏IL-6或CD95的小鼠表现出减少的肺炎.
结论:
- 一个非正规的CD95L-CD95通路调解了巨细胞的激活和功能障碍.
- CD95/CD95L轴代表了减轻COVID-19相关严重炎症的潜在治疗标.
更多相关视频
10:39Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy
Published on: April 16, 2019
09:00Characterization of Immune Cells and Proinflammatory Mediators in the Pulmonary Environment
Published on: June 24, 2020
相关概念视频
T Cell Types and Functions
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Cell-mediated Immune Responses
Chronic Obstructive Pulmonary Disease-II: Pathophysiology
Chronic Inflammation
Defense Against Bacterial Pathogens
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
