"子"使中性粒细胞能够在高剪切率下滚动
Prithu Sundd1, Edgar Gutierrez, Ekaterina K Koltsova
1Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California 92037, USA.
Nature
|July 6, 2012
概括
中性粒细胞表现出独特的独特特征.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 白细胞沿着血管壁滚动.
- 中性粒细胞通过细胞平坦化和后部带在高剪切应力下滚动.
- 之前的模型建议在滚动后进行绳索收缩.
研究的目的:
- 为了研究在高剪压中性粒细胞滚动过程中膜带的行为.
- 阐明炎症中抗剪白细胞粘附的机制.
主要方法:
- 使用急性炎症模型进行体内研究.
- 使用P-选择素和中性粒细胞的体外实验.
- 高速显微镜观察细胞基质相互作用.
主要成果:
- 膜连线在滚动中性粒细胞的前部以""形式存在,而不是收缩.
- P-选择蛋白糖蛋白连接体-1 (PSGL-1) 局部化在上的斑点上,而LFA-1分布广泛.
- 由于PSGL-1补丁在水力动力力下发生故障,从P-选择素基板逐步剥离.
结论:
- 中性粒细胞在高切割应力下滚动,涉及到持久的"",形成细胞自主粘合基质.
- 这种"逐步剥离绳索"机制不同于以前的"拉绳索"模型.
- 片在炎症微环境中促进中性粒细胞的粘附和迁移.
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