机体发生炎症时 ,白细胞经血管壁进入组织间隙的过程称为白细胞的游出。白细胞的游出是炎症反应最重要的特征 ,游出的中性粒细胞和单核细胞可吞噬和降解细菌、病毒和坏死的组织碎片等 ,构成炎症反应的主要防御环节。1　白细胞游出有关的分子1.1　 P-选择蛋白　在白细胞游出过程 Inflammation occurs in the body, the process of white blood cells into the tissue gap through the blood vessel wall called leukocytes swim out. The outflow of white blood cells is the most important feature of the inflammatory response, swimming out of neutrophils and monocytes can phagocytosis and degradation of bacteria, viruses and necrotic tissue fragments, constitute the main part of the inflammatory response. 1 Leukocyte migration-related molecules 1.1 P-selectin in leukocyte migration process