中性粒细胞介导炎症与粘附分子之间的关系

Role of adhesion molecules in neutrophil-mediated inflammation

粘附分子与中性粒细胞介导的炎症反应之间有密切关系。炎症过程中,粘附分子介导的中性粒细胞与血管内皮细胞之间的粘附是第1步也是较为关键的步骤。主要有3类粘附分子家族参与中性粒细胞-内皮细胞之间的粘附:选择素家族、整合素家族和免疫球蛋白超家族分子。不同种类的粘附分子依次表达或活化与去活化在这一粘附过程中起着重要作用。首先,中性粒细胞减速,在血管内皮细胞表面滚动,这由选择素介导;接着,活化的整合素分子与内皮细胞表面的免疫球蛋白超家族分子（ICAM_s）结合使中性粒细胞-内皮细胞之间牢固结合;然后,中性粒细胞游出管,这依赖于趋化因子、整合素及PECAM-1。因粘附分子与炎症有密切关系,故可考虑用粘附分子抑制剂来治疗炎症。

Adhesion molecules are involved in neutrophil-mediated inflammation. Neutropil adhesion to endothelial cell mediated by cell adhesion molecules (CAMs) is the first and critical step during the process of inflammation. Three families of CAMs play a central role in neutrophil-endothe-lial cell interactions : the selectins, the integrins, and the immunoglobulin superfamily. These different types of CAMs interact in a programmed, sequential manner to form neutrophil-endothelial cell adhesion cascade. The initial phase of inflammation, neulrophil slowing and rolling, is mediated by selectins; subsequently, firm adhesion of neu-trophils to vessel endothelial cells occurs via binding of the activated integrins and the endothelial receptors such as intercellular adhesion molecule-1 (ICAM-1); Then, neutrophils transmigrate into the tissues, this process requires chemotactic factors, integrins and PEC AM-1. Because of the important role of CAMs in the process of inflammation. Agents may be used to block the function of CAMs as a strategy of antiinflammatory therapy.