细胞自主调节的补充C3由H因子限制了巨细胞增多,并加剧了动脉样硬化
Máté G Kiss1, Nikolina Papac-Miličević2, Florentina Porsch1
1Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria; CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.
Immunity
|July 27, 2023
概括
补充因子H (CFH) 调节补充成分3 (C3) 的消耗. 巨细胞中CFH缺乏会通过增强细胞增生和限制斑块亡来减少动脉样硬化.
科学领域:
- 免疫学 免疫学 免疫学
- 血管生物学 血管生物学
- 补充系统生物学 补充系统生物学
背景情况:
- 补充因子H (CFH) 是补充成分3 (C3) 消耗的关键调节者,防止过度的补充激活.
- CFH的遗传变异与患慢性炎症疾病的倾向有关.
- 在慢性炎症性血管疾病动脉样硬化中CFH的作用仍然不完全理解.
研究的目的:
- 研究CFH对动脉样硬化的发展和进展的影响.
- 阐明CFH影响巨细胞功能和动脉样硬化斑块内的炎症过程的特定机制.
主要方法:
- 利用动脉样硬化的小鼠模型来研究CFH缺乏的影响.
- 在单细胞衍生的炎症性巨细胞中检查了CFH表达和C3消耗.
- 评估了CFH缺乏和野生类型小鼠的斑块亡,细胞和斑块大小.
- 分析了人类动脉样硬化斑块,以检测巨细胞中C3和CFH的存在.
主要成果:
- 在动脉样硬化的小鼠模型中,CFH缺乏以C3依赖的方式限制了斑块亡.
- 巨细胞中CFH的删除导致了不受控制的细胞内C3消耗,增强的细胞效应,以及减少斑块大小.
- 在单细胞和巨细胞中发现了CFH表达,在炎症期间增加,与细胞内C3积累相关.
- 人类动脉样硬化斑块含有单细胞衍生的巨细胞,表达C3和CFH.
结论:
- CFH在细胞内C3水平的调节中发挥着关键作用,在巨细胞内以细胞自主的方式调节.
- 巨细胞衍生的CFH减轻炎症的解消,并损害了细胞形成.
- 针对这种CFH-巨细胞调节轴可能为诸如动脉样硬化等炎症性疾病提供治疗策略.
相关概念视频
Complement System
2.4K
The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a...
2.4K
Inflammation
53.9K
Overview
53.9K
Phagocytosis of Apoptotic Cells
3.9K
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or immature dendritic cells. Non-professional phagocytes such as epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes.
Normal cells contain receptors that prevent them from being recognized...
Normal cells contain receptors that prevent them from being recognized...
3.9K
Regulation of Hematopoietic Stem Cells
3.2K
All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
3.2K
Coronary Artery Disease II: Pathophysiology
13
Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
13


