相关实验视频
Updated: Jul 21, 2025

11:20
Alveolar Macrophage Phagocytosis and Bacteria Clearance in Mice
Published on: March 2, 2019
11.2K
乙酸亚酸酸酶通过防止膜巨细胞的耐受性来促进肺部防御
Xiaofang Cheng1, Wei Jiang2, Yeying Chen1
1Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People's Hospital, Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Shanghai Institute of Infectious Disease and Biosecurity, Fudan University, Shanghai, China.
PLoS pathogens
|July 27, 2023
概括
肠道脂多糖 (LPS) 可以使肺部免疫细胞变得不敏感,从而损害肺部的防御能力. 酶乙氧酸酶 (AOAH) 禁用肠道LPS,促进肺部的抗菌反应.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 肺部医学 肺部医学
背景情况:
- 膜巨细胞 (AMs) 对于肺部免疫非常重要.
- 暴露于LPS可以诱导免疫耐受性.
- 在健康的动物中对AMS的调控还不太清楚.
研究的目的:
- 调查肠道LPS是否影响AMS和肺免疫.
- 确定乙烯基酸酸酶 (AOAH) 在LPS耐受性和肺部防御中的作用.
主要方法:
- 对AOAH缺乏的 (Aoah-/-) 和野生型 (Aoah+/+) 鼠标进行比较.
- 评估AM反应能力,细胞化和细胞因子的产生.
- 用Pseudomonas aeruginosa引起的肺部挑战.
- 使用LPS和抗菌药物.
- 对TLR4参与的评估.
主要成果:
- Aoah-/- AMs对LPS表现出低反应性和减少的细胞化.
- 在Aoah-/-小鼠中,先天免疫反应受损,肺部感染易感性增加.
- 肠道LPS以TLR4依赖的方式诱导了AM耐受性.
- 在Aoah-/-小鼠中,抗菌治疗恢复了AM反应.
结论:
- 交叉肠LPS可以通过TLR4耐受膜巨细胞,从而损害肺免疫力.
- AOAH使肠道LPS无活化,从而支持肺部抗菌防御.
- 针对AOAH或肠道LPS可能为肺部感染提供治疗策略.
相关概念视频
Chronic Obstructive Pulmonary Disease-II: Pathophysiology
2.9K
Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Inflammation
2.9K
Defense Against Bacterial Pathogens
1.4K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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...
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...
1.4K
Alveoli and Alveolar Ducts
2.7K
The respiratory zone of the human body, which stands in contrast to the conducting zone, comprises the structures that actively participate in the exchange of gases. The initiation of this zone is marked by the terminal bronchioles converging into respiratory bronchioles, the tiniest bronchiole classification. The respiratory bronchioles give way to the alveolar ducts that opens into a congregation of alveoli. Actively involved in gas exchange, alveoli resemble tiny sacs similar to clusters of...
2.7K
Antiasthma Drugs: Leukotriene Modifiers
365
Leukotriene modifiers, or cysteinyl leukotriene receptor antagonists, are medications used to manage chronic asthma. These agents target specific inflammatory mediators produced during arachidonic acid metabolism, an essential process in generating inflammation in the body.
Leukotriene modifiers work through two distinct mechanisms:
Leukotriene modifiers work through two distinct mechanisms:
365
Cystic Fibrosis: Pathogenesis
290
Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
290

