血小板的RANTES沉积触发了炎症和动脉样硬化内皮上单细胞的停滞
P von Hundelshausen1, K S Weber, Y Huo
1Institut für Prophylaxe der Kreislaufkrankheiten, Ludwig-Maximilians-Universität, Munich, Germany.
Circulation
|April 3, 2001
概括
血小板释放RANTES,这是一种化学激素,有助于单细胞粘附在炎症的血管壁上,导致炎症和动脉样硬化. 这种血小板衍生的RANTES是这些疾病中单细胞招募的关键.
科学领域:
- 心血管生物学 心血管生物学
- 免疫学 免疫学 免疫学
- 动脉样硬化研究 动脉样硬化研究
背景情况:
- 像RANTES这样的血小板和化基因与炎症和动脉样硬化疾病有关.
- 这些因素影响单细胞和内皮细胞的相互作用.
研究的目的:
- 为了研究血小板衍生的RANTES在单细胞对炎症内皮的粘附中的作用.
- 确定血小板的RANTES沉积是否有助于动脉样硬化中单细胞的招募.
主要方法:
- 通过ELISA和免疫光检测可以检测RANTES结合.
- 并行壁流室和视频显微镜用于研究单细胞结.
- 使用RANTES受体对抗剂 (Met-RANTES) 和阻断抗体的抑制研究.
- 动脉样硬化的小鼠模型中的免疫组织化学.
- 鼠 carotid 动脉的活体输液. 鼠 carotid 动脉的活体输液.
主要成果:
- 血栓激素刺激的血小板将RANTES固定在炎症的内皮上.
- 固定式RANTES触发了耐切割单细胞的停止,被Met-RANTES或抗体阻断.
- 对于RANTES的沉积和作用,需要内皮细胞激活 (例如,通过互白素-1β).
- 在小鼠动脉中的动脉样硬化病变上存在RANTES.
- 这些动脉中的单细胞积累涉及RANTES受体.
结论:
- 血小板衍生的RANTES沉积会在炎症或动脉样硬化性内皮上启动单细胞结.
- 兰特斯的血小板输送代表了一种用于炎症和动脉动脉原性单细胞招募的新机制.
更多相关视频
相关概念视频
01:38Inflammation
46.6K
Overview
46.6K
01:22Formation of the Platelet Plug
6.2K
The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
6.2K
01:26Coronary Artery Disease II: Pathophysiology
1.1K
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...
1.1K
01:30Atherosclerosis I: Introduction
2.5K
Atherosclerosis is a progressive disorder characterized by the buildup of plaques on the arterial inner wall, causing them to narrow and harden over time. These plaques comprise lipids, calcium, blood components, carbohydrates, and fibrous tissue. The process primarily affects the intima of large and medium-sized arteries, reducing blood flow in any artery.Etiology and risk factorsThe cause of atherosclerosis is multifactorial, involving a complex interplay among endothelial injury, lipid...
2.5K
01:30Peripheral Artery Disease I: Introduction
659
Peripheral artery disease (PAD) predominantly results from atherosclerosis, which involves the accumulation of fatty deposits, or plaques, within the walls of arteries. This causes them to narrow and harden, significantly reducing blood flow. PAD predominantly affects the legs, particularly the arteries supplying the thighs and calves. In rare cases, it may involve other arteries, including those in the arms.Etiology of PAD:The principal cause of PAD is atherosclerosis, which results from fatty...
659
01:26Acute Inflammation I: Cellular Phase
82
The cellular phase of acute inflammation is a tightly orchestrated sequence of events that recruits leukocytes, primarily neutrophils, to sites of tissue injury or infection. Following the initial vascular changes, this phase ensures effective immune cell migration, activation, and function at the affected site to eliminate pathogens and initiate tissue repair.Leukocyte Recruitment CascadeLeukocyte recruitment happens in four steps: margination, adhesion, transmigration, and chemotaxis. Reduced...
82