补充剂依赖性中性粒细胞的招募对于弹性酶诱导的腹腔大动脉动脉瘤的发展至关重要
Monica B Pagano1, Hui-fang Zhou, Terri L Ennis
1Department of Surgery, Section of Vascular Surgery, Washington University School of Medicine, St Louis, Mo., USA.
Circulation
|March 25, 2009
概括
补体系统,特别是它的替代途径,对于招募中性粒细胞和推动腹腔大动脉瘤 (AAA) 发展至关重要. 向补充剂为AAA提供了一个新的治疗策略.
科学领域:
- 血管生物学 血管生物学
- 免疫学 免疫学 免疫学
- 补充系统 补充系统
背景情况:
- 中性粒细胞在实验性腹腔大动脉动脉瘤 (AAA) 发育中至关重要.
- 发起中性粒细胞流入大动脉壁的特定信号是未知的.
研究的目的:
- 测试补充激活在AAA中为中性粒细胞招募提供化学反应信号的假设.
- 研究补充系统在AAA病理生理学中的作用.
主要方法:
- 利用了EAA的弹性酶诱导的小鼠模型.
- 施用了蛇毒因子来削弱血清补充活性.
- 在缺乏B因子的小鼠中检查了AAA的发展.
- 评估过敏毒素C3a和C5a的作用.
- 分析了人类AAA组织.
主要成果:
- 通过蛇毒因子的补充物耗尽显著保护AAA发展.
- 在AAA中,B因子缺乏表明替代补充途径在AAA中起着重要作用.
- 替代途径的激活产生了C3a和C5a,招募了中性粒细胞.
- 阻断C3a和C5a是抑制AAA所必需的.
- 在实验和人类AAA中观察到补充替代途径的参与.
结论:
- 补体系统与腹腔大动脉动脉瘤的病理生理学有关.
- 这一发现确定了补充系统作为AAA的潜在治疗点.
相关概念视频
Inflammation
46.6K
Overview
46.6K
Selectins
3.6K
Cell adhesion is an essential aspect of multicellularity. While stable cell interactions usually occur between cells of the same type, transient cell interactions occur between cells of different tissue types, such as between neutrophils and endothelial cells. Selectins are one class of cell adhesion molecules (CAMs) that bind carbohydrate ligands to form transient cell adhesion. They are rod-like proteins with a long extracellular part of variable length ending with the lectin domain,...
3.6K
Acute 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


