概括
多态核中性粒细胞 (PMN) 显示出对内皮细胞的特定粘附,这是炎症的关键过程. 这种相互作用受到细胞表面电荷和化疗剂的影响.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 生物医学研究生物医学研究
背景情况:
- 多态核中性粒细胞 (PMN) 是关键的免疫细胞,参与急性炎症反应.
- 内皮细胞形成血管的内膜,并起到调节免疫细胞贩运的作用.
- 了解PMN-内皮细胞相互作用对于了解体内炎症过程至关重要.
研究的目的:
- 为了研究多态核核中性粒细胞 (PMN) 和培养的内皮细胞之间的粘合特异性.
- 探索调节PMN-内皮细胞粘附的因素,包括双价离子,神经aminidase和化学毒剂.
- 建立一个模型系统来研究急性炎症期间的PMN边缘化.
主要方法:
- 使用单层采集试验量化PMN附着在内皮细胞上的数量.
- 通过扫描电子显微镜直接使用细胞计数来精确测量粘附.
- 评估了双价离子,神经氨基酶和化学毒剂对PMN-内皮细胞相互作用的影响.
主要成果:
- 与其他细胞类型相比,PMN对内皮细胞具有显著的粘合特异性.
- 表明双价离子和神经氨基酶调节PMN-内皮细胞粘附,这表明表面电荷的作用.
- 观察到PMN对内皮细胞粘附的增加,在有化疗剂的情况下.
结论:
- 这项研究证实了PMN和内皮细胞之间的特定粘合相互作用.
- 表面电荷似乎在PMN-内皮细胞粘附中发挥作用,这种粘附可以调节.
- 开发的系统可以作为一种有价值的模型,用于在炎症中PMN边缘化的体内研究.
相关概念视频
01:24Adherens Junctions
5.8K
Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types – adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
Adherens Junctions are Dynamic
5.8K
01:20Cell Adhesion Molecules - Types and Functions
8.1K
Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical interactions between cells and provide mechanical strength to tissues. They also function as receptors for signal transmission across the plasma membrane. The CAMs are broadly classified into four families - integrins, cadherins, selectins, and immunoglobulin-like CAMs (IgCAMs).
CAM Families
The Integrin family of proteins is primarily involved...
CAM Families
The Integrin family of proteins is primarily involved...
8.1K
01:25Selectins
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
01:31Immunoglobulin-like Cell Adhesion Molecules
3.3K
Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
3.3K
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