慢性肝病患者血清可溶性细胞间粘附分子-1和透明质酸水平的变化及意义

目的:探讨血清可溶性细胞间粘附分子-1(sICAM-1)和透明质酸(HA)与肝纤维化及肝损害的关系。方法:用ELISA法检测正常人、慢性肝炎肝硬变患者血清sICAM-1;用RIA法测定正常人、慢性肝炎及肝硬变患者血清HA。结果:慢性肝病患者各组血清sICAM-1均显著高于正常人,各组间存在显著的差异。血清HA水平在慢性肝炎中度组、重度组、肝硬变组明显高于正常人。在不同临床类型的慢性肝病患者中HA血清水平也存在显著的差异。病情越重,血清sICAM-1和HA水平越高。两者与血清草酰乙酸转氨酶(AST)、总胆红素、球蛋白呈显著正相关,与血清白蛋白呈显著负相关。结论:慢性肝病患者血清sICAM-1和血清HA可作为判断肝纤维化及肝损伤程度的指标。

Changes of pulmonary intercellular adhesion molecule-1 and CD11b/CD18 in peripheral polymorphonuclear neutrophils and their significance at the early stage of burns

Objective: To investigate the role of intercellular adhesion molecule 1 (ICAM 1) in the accumulation of polymorphonuclear neutrophils (PMN) in the lungs at the early stage of burns. Methods: Myeloperoxidase content in lung tissues and bronchoalveolar lavage fluid (BALF) were detected. ICAM 1 and its mRNA expression in lung tissues were determined by immunohistochemical method and in situ hybridization. CD11b/CD18 expression on the peripheral PMNs was measured by flowcytometry. Results: The levels of myeloperoxidase in lung tissues and BALF after burn injury were markedly higher than those of control. Expression of ICAM 1 and its mRNA in the lung tissues and CD11b/CD18 on peripheral PMNs surface was significantly increased at 2, 6, 12, 24 h after burns. Conclusions: PMNs accumulation in the lungs is related to increased ICAM 1 expression on pulmonary microvascular endothelial cells and CD11b/CD18 expression on PMN at the early stage of burn injury.