对肺囊的保护性先天免疫不需要Stat6依赖的巨细胞两极分化
T Mousso1, S J Pollock1, P C Inzerillo1
1Department of Pediatrics, University of Rochester School of Medicine and Dentistry, Rochester, New York, USA.
Infection and immunity
|August 16, 2024
概括
FVB/NJ小鼠通过天生的免疫,独立于Stat6信号,抵抗肺囊炎感染. 替代途径可能调节这种巨细胞依赖的抗性,突出显示新的免疫机制.
科学领域:
- 免疫学 免疫学 免疫学
- 菌类学 菌类学是指菌类学.
- 传染性疾病 传染性疾病
背景情况:
- 肺囊菌种在免疫受损个体中引起机会性感染.
- 在没有CD4+T细胞的情况下,FVB/NJ小鼠表现出独特的与生俱来的免疫力对抗肺囊炎,这种免疫力由膜巨细胞介导,即使没有CD4+T细胞.
- 在FVB/NJ小鼠中,膜巨体表现出M2偏向的表型,这表明它在抗感染性中起着作用.
研究的目的:
- 为了研究Stat6信号在FVB/NJ小鼠对肺囊炎感染的先天性耐药性的作用.
- 为了确定Stat6是否对Pneumocystis刺激后FVB/NJ膜巨细胞的M2极化至关重要.
- 探索涉及巨细胞介导的与生俱来的免疫力对肺囊的替代途径.
主要方法:
- 产生FVB Stat6缺乏的小鼠 (FVB Stat6-/-).
- 对 Th2 细胞因子和 Pneumocystis 的反应中膜巨细胞 M2 两极分化的评估.
- 在FVB Stat6-/-和FVB MerTK-/-小鼠中评估肺囊炎感染易感性.
主要成果:
- FVB Stat6-/-小鼠仍然对肺囊炎感染有抗性,这表明 Stat6 无需先天性抗性.
- 在FVB Stat6缺陷的膜巨细胞中,M2偏向与Th2细胞因子受损,但在直接刺激Pneumocystis时保持M2标记物和上调M2基因.
- 在FVB MerTK-/-小鼠中,对肺囊炎感染的敏感性仅略有增加.
结论:
- 对于FVB/NJ小鼠对Pneumocystis的天生的免疫,不需要Stat6信号.
- 除了Stat6,其他途径可能调节由FVB/NJ膜巨细胞介导的M2极化和先天性抵抗.
- 这些发现揭示了针对真菌呼吸道病原体的先天免疫防御的新机制.
相关概念视频
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
Immune Surveillance by NK Cells and Phagocytes
1.4K
Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
1.4K
Cell-mediated Immune Responses
67.9K
Overview
67.9K
Immune Response Against Viral Pathogens
766
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...
766
Cells of the Innate Immune Response
1.6K
The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
1.6K


