三七总皂苷对大鼠脑梗死区ICAM-1表达和中性粒细胞浸润的影响

目的:研究三七总皂苷对大鼠脑梗死区细胞间粘附分子-1(ICAM-1)表达和中性粒细胞浸润的影响.方法:大鼠大脑中动脉短暂阻塞制成局灶性脑缺血2 h再灌注24 h模型.再灌注后2 h腹腔注射三七总皂苷25或50 mg/kg.再灌注24 h后分光光度法测定缺血区大脑皮层和尾壳核髓过氧化物酶(MPO)活性,免疫组织化学染色测定大脑皮层和尾壳核细胞间粘附分子-1(ICAM-1)的表达.结果:大鼠局灶性脑缺血再灌注后,缺血区大脑皮层和尾壳核MPO活性和ICAM-1表达明显增加,三七总皂苷50 mg/kg治疗用药能降低MPO活性和抑制ICAM-1表达.结论:三七总皂苷可抑制大鼠局灶性脑缺血再灌注后ICAM-1表达和中性粒细胞浸润,减轻脑梗死区炎症反应.

Effect of Panax notoginseng Saponins on Intercellular Adhesion Molecule-1 Expression and Neutrophil Infiltration in Cerebral Infarction Tissue of Rats

OBJECTIVE: To investigate the effect of Panax notoginseng saponins (Pns) on the expression of intercellular adhesion molecule-1 (ICAM-1) and brain neutrophil infiltration induced by transient focal cerberal ischemia and reperfusion in rats. METHODS: Focal cerebral ischemia-reperfusion model in rats (male) were made by transient occlusion of the middle cerebral artery (MCA) for 2 h followed by 24 h reperfusion. Pns 25 and 50 mg/kg were administered ip at 2 h after reperfusion. At 24 h after reperfusion, neutrophil infiltration and the expression of intercellular adhesion molecule-1 (ICAM-1) were measured with myeloperoxidase (MPO) activity, and immunohistochemistry, respectively. RESULTS: After ischemia reperfusion, the expression of ICAM-1 and MPO activity in the ischemic hemisphere cortex of MCA area and caudate putamen were markedly increased. Treatment with 50 mg/kg Pns inhibited neutrophil infiltration and the expression of ICAM-1. CONCLUSION: Pns inhibited neutrophil infiltration and the expression of ICAM-1 following focal cerebral ischemia-reperfusion in rats, attenuated the ischemic brain inflammation.