通过阻断中性粒细胞外细胞陷来减少腹腔大动脉动脉瘤的进展取决于血栓的形成
Nahla Ibrahim1, Sonja Bleichert1, Johannes Klopf1
1Division of Vascular Surgery, Department of General Surgery, Medical University of Vienna and University Hospital Vienna, Vienna, Austria.
JACC. Basic to translational science
|April 1, 2024
概括
针对上游中性粒细胞外细胞陷 (NETs) 的形成,有效地防止了小鼠模型中的腹腔大动脉瘤 (AAA) 进展,与下游抑制剂不同,为AAA疾病提供了新的治疗见解.
科学领域:
- 血管生物学 血管生物学
- 免疫学 免疫学 免疫学
- 心血管研究研究心血管研究
背景情况:
- 中性粒细胞外细胞陷 (NETs) 在腹腔大动脉动脉瘤 (AAA) 发病过程中发挥作用,这种病原体存在于前列腺和内血栓中.
- 在AAA中,NET是潜在的治疗点,但针对NET形成不同阶段的有效性需要研究.
研究的目的:
- 在小鼠AAA模型中,比较上游与下游NET形成媒介的向治疗疗效.
- 在模仿人类疾病的AAA模型中评估NET抑制的潜力,包括血栓发育.
主要方法:
- 使用了两种不同的小鼠AAA模型:一种是通过血管新素II输液诱导的,另一种是通过周周冒险弹性酶的应用.
- 在治疗干预开始时,在已确定的动脉瘤中确认了NET.
- 针对上游或下游分子的NET抑制剂被用于评估它们对AAA进展的影响.
主要成果:
- 在弹性酶诱导的AAA模型中,NET抑制剂无效.
- 然而,NET抑制剂成功地阻止了血管激素II诱导的AAA的进展,特别是在血栓形成的模型中.
- 针对上游的NET介质,与干扰下游的NET分子相比,在血管素II模型中显示出更高的治疗潜力.
结论:
- 针对上游NET形成的治疗策略在预防AAA进展方面更有希望,特别是在类似于人类AAA与血栓的疾病环境中.
- 这些发现强调了基于向途径和使用的特定AAA模型的NET抑制的差异性疗效.
相关概念视频
01:16Clot Retraction and Fibrinolysis
5.8K
After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
5.8K
01:22Formation of the Platelet Plug
6.1K
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...
6.1K
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
690
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
690