在髓状细胞中,Irgm1对于对病原性细菌的免疫耐药性的不同作用
Brian E Fee1, Lanette R Fee1, Aemilia R Sprouse1
1Department of Medicine, Division of Geriatrics, and Center for the Study of Aging and Human Development, Duke University Medical Center, PO Box 3003, Durham, NC 27710, United States.
Journal of leukocyte biology
|November 20, 2025
概括
免疫蛋白IRGM1对于对抗髓状细胞中的细胞内病原体至关重要. 它还需要其他免疫细胞来防御肠道细菌,从而影响炎症疾病的风险.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 与免疫相关的GTPase (IRG) 对于对各种病原体的宿主防御至关重要.
- IRGM蛋白与克罗恩病等炎症性疾病有关,但它们在体内特定的细胞功能尚不清楚.
研究的目的:
- 确定IRGM1在体内控制感染的特定细胞类型.
- 研究IRGM1在骨髓细胞中的作用与感染期间的其他造血细胞的作用.
主要方法:
- 产生的条件淘汰赛小鼠 (Irgm1fl/flLyz2-Cre+) 具有骨髓特异性缺失的Irgm1.
- 挑战这些小鼠和其他条件淘汰模式 (Irgm1fl/flVav-Cre+) 与细胞内 (沙门氏菌,李斯特菌,毒菌) 和细胞外 (Citrobacter rodentium) 病原体.
- 在淘汰赛模型中评估敏感性和表征巨细胞功能.
主要成果:
- 骨髓细胞特定的Irgm1删除 (Irgm1fl/flLyz2-Cre+) 导致对细胞内病原体的敏感性,类似于全球的Irgm1-/-小鼠.
- 这些小鼠对细胞外细菌Citrobacter rodentium表现出正常的耐药性,与血液形成缺失小鼠 (Irgm1fl/flVav-Cre+) 不同.
- 来自骨髓细胞特异性淘汰赛小鼠的巨细胞表现出全球淘汰赛小鼠所见的病理,证实了删除的有效性.
结论:
- 髓状细胞中的IRGM1功能对抗细胞内病原体的抵抗至关重要.
- 在额外的造血细胞群中,IRGM1的功能是对抗细胞外肠道病原体的防御所需的.
- 了解细胞特异性的IRGM1作用可以为炎症和传染病的策略提供信息.
相关概念视频
Defense Against Bacterial Pathogens
2.6K
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...
2.6K
Differentiation of Common Myeloid Progenitor Cells
3.9K
Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
3.9K
Antimicrobial Proteins
12.9K
Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
12.9K
Cell-mediated Immune Responses
83.4K
Overview
83.4K
T Cell Types and Functions
2.1K
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
2.1K
Immune Surveillance by NK Cells and Phagocytes
7.8K
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...
7.8K


