在病毒感染后恢复期间,I型和III型干扰肺上皮的修复
Jack Major1, Stefania Crotta1, Miriam Llorian2
1Immunoregulation Laboratory, The Francis Crick Institute, London, UK.
Science (New York, N.Y.)
|June 13, 2020
概括
过度的干扰素 (IFN) 信号破坏病毒感染后的肺部修复. 具体来说,IFN-λ通过阻碍上皮再生,增加疾病的严重性和对二次感染的易感性来驱动这种效应.
科学领域:
- 免疫学
- 呼吸系统医学
- 分子生物学
背景情况:
- 细胞因子信号传递,特别是干扰素 (IFN),在对抗呼吸道病毒感染的宿主防御中起着至关重要的作用.
- 虽然I型干扰素 (IFN-α,IFN-β) 可以引起有害的炎症,但III型干扰素 (IFN-λ) 主要作用于上皮细胞,以建立局部抗病毒免疫力.
- 失调或延长的IFN反应可能会加剧肺组织损伤并阻碍恢复.
研究的目的:
- 在小鼠模型中研究干扰素信号在流感感染后的肺部修复中的作用.
- 为了确定不同类型的干扰素 (I型与 导致肺损伤和再生障碍.
- 识别干扰肺上皮的分子机制.
主要方法:
- 利用流感感染的小鼠模型研究肺组织修复动态.
- 在恢复阶段分析了I型和III型干扰素的表达和信号通路.
- 研究了IFN诱导的蛋白p53在上皮细胞增殖和分化中的功能.
- 评估疾病的严重程度和对细菌超级感染的易感性.
主要成果:
- 在小鼠感染流感后,干扰干扰肺部修复过程.
- IFN-λ被确定为肺上皮再生受损的强有力的驱动因素.
- 发现IFN诱导的蛋白质p53直接抑制了上皮细胞的增殖和分化.
- 肺部修复功能受损导致疾病严重程度增加,并增加了对二次细菌感染的易感性.
结论:
- 过度或长期产生干扰素,特别是IFN-λ,通过阻碍肺上皮再生,加剧病毒性呼吸道感染.
- IFN诱导的蛋白质p53是干扰素驱动的肺修复抑制的关键媒介.
- 内源性干扰素作用的时间和持续时间是病毒病变和恢复的关键因素.
- 这些发现对开发针对流感和COVID-19等病毒感染的干扰素途径的治疗策略有意义.
更多相关视频
08:42Isolating Bronchial Epithelial Cells from Resected Lung Tissue for Biobanking and Establishing Well-Differentiated Air-Liquid Interface Cultures
Published on: May 26, 2023
3.8K
09:02Infection of Primary Nasal Epithelial Cells Grown at an Air-Liquid Interface to Characterize Human Coronavirus-Host Interactions
Published on: September 22, 2023
2.0K
相关概念视频
01:29Immune Response Against Viral Pathogens
1.5K
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
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...
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...
1.5K
01:17Drugs Used in Lower Respiratory Disorders: Overview
908
Lower respiratory tract disorders present challenges that often require skilled and nuanced approaches for effective management. Common ailments, such as asthma and chronic obstructive pulmonary disease (COPD), have prompted the development of intricate treatment strategies involving bronchodilators and anti-inflammatory drugs, each tailored to ease breathing and revitalize the lungs.
Bronchodilators, the first step of respiration enhancement, come in various forms, each with its own mechanism...
Bronchodilators, the first step of respiration enhancement, come in various forms, each with its own mechanism...
908
01:28Phases of Wound Repair
7.5K
Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among resident skin cells, blood mononuclear cells, extracellular matrix, growth factors, and cytokines to complete the healing cascade.
Formation of Blood Clot
In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...
Formation of Blood Clot
In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...
7.5K
01:29Pneumonia II: Pathophysiology
2.3K
The pathophysiology of pneumonia involves the following steps:
2.3K