在腹膜病变期间,从内皮表面连接的隔间中针对PECAM的有针对性的回收
Zahra Mamdouh1, Xia Chen, Lynda M Pierini
1Department of Pathology and Laboratory Medicine, Weill Medical College, 1300 York Avenue, New York, New York 10021, USA.
Nature
|March 1, 2003
概括
白细胞的超内皮移动 (TEM) 涉及一个亚等离子体内膜网络. 这个包含PECAM-1的网络在TEM期间动态准结点,促进白细胞通过.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 内皮细胞生物学 内皮细胞生物学
背景情况:
- 白细胞扩散对于免疫反应和炎症至关重要.
- 超内皮移动 (TEM) 允许白细胞穿过内皮屏障.
- 在TEM期间快速,可逆的内皮细胞边界变化仍然不太了解.
研究的目的:
- 为了研究白细胞TEM期间内皮细胞的动态膜变化.
- 确定使移徙白细胞快速适应内皮细胞边界的分子机制.
主要方法:
- 利用实时成像技术在TEM期间观察内皮细胞边界动态.
- 研究了白细胞迁移期间PECAM-1的作用和局部化.
- 使用抗体阻塞来评估对膜招募和TEM的影响.
主要成果:
- 在内皮细胞边界连接到连接处的亚等离子体膜网络.
- 证明PECAM-1在这个网络中被构成性地回收,并在TEM期间向迁移白细胞接触点.
- 表明用抗PECAM-1抗体阻断TEM可以防止膜向迁移区域招募.
结论:
- 在内皮细胞表面下的动态膜网络在TEM期间促进了快速的边界变化.
- PECAM-1在准这种膜网络,以促进白细胞迁移方面发挥着至关重要的作用.
- 了解这种机制,可以了解免疫细胞贩运和炎症过程.
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