白细胞滚动和扩散在P选择因缺乏的小鼠中严重受损
T N Mayadas1, R C Johnson, H Rayburn
1New England Medical Center, Department of Medicine, Boston, Massachusetts.
Cell
|August 13, 1993
概括
缺乏P选择素的小鼠,一个关键的细胞粘附分子,在炎症期间显示出中性粒细胞运动和招募受损. 这突显了P选择素在白细胞相互作用和炎症反应中的关键作用.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 血液学 血液学 血液学
背景情况:
- 选择蛋白是一种粘附受体,在激活的内皮细胞和血小板上发现.
- 它在白细胞与血管壁之间的相互作用中起作用.
研究的目的:
- 研究P选择因在白细胞行为和炎症反应中的功能.
- 通过基因向生成的P选择因缺乏的小鼠的特征.
主要方法:
- 在胚胎干细胞中准基因以创建缺乏P选择因的小鼠.
- 在体内观察白细胞行为,包括中性粒细胞计数和招募.
- 分析白细胞在介质静脉中滚动的情况.
主要成果:
- 缺乏P选择因的小鼠表现出高的循环中性粒细胞数量.
- 在这些小鼠中,白细胞在介质静脉中滚动几乎不存在.
- 在炎症期间,中性粒细胞向腹腔招募显著延迟.
结论:
- 皮选择素对于白细胞与血管壁的相互作用至关重要.
- 它在白细胞招募到炎症部位的早期阶段起着至关重要的作用.
- 缺乏P选择因的小鼠是研究炎症和血小板功能的宝贵工具.
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