灯盏花素对大鼠脑缺血后细胞间粘附分子-1及其mRNA表达的影响

Effect of erigeron on intercellular adhesion molecule-1 and its mRNA expression during cerebral ischemia and reperfusion in rats

目的灯盏花素对大鼠脑缺血后细胞间粘附分子-1(ICAM-1)及其mRNA表达的影响。方法复制大鼠大脑中动脉闭塞/再灌注模型,应用RT-PCR及免疫组织化学的方法,观察各组大鼠脑缺血后细胞间粘附分子-1mRNA及其蛋白的表达。结果ICAM-1在假手术组大鼠脑组织呈低表达;单纯缺血组(缺血90min)ICAM-1表达上调(P<005);缺血再灌注组(缺血90min再灌24h)脑组织ICAM-1表达显著高于假手术组和单纯缺血组(P<001);灯盏花素治疗组于相同时限ICAM-1表达与单纯缺血、缺血再灌注组相比显著下调(P<001)。大鼠脑组织ICAM-1mRNA在假手术组呈低表达;单纯缺血组ICAM-1mRNA水平显著上调(P<001);药物治疗组于相同时限ICAM-1mRNA水平显著低于单纯缺血组及缺血再灌注组(P<001)。结论灯盏花素下调细胞间粘附分子-1mRNA及其蛋白的表达,减轻缺血后再灌注损伤,从而发挥脑保护作用。

AIM: To investigate the effect of erigeron on intercellular adhesion molecule-1 (ICAM-1) and mRNA expression during cerebral ischemia/reperfusion. METHODS: The rat models of middle cerebral artery (MCA) focal cerebral ischemic reperfusion were established with the suture method in the study. The ICAM-1 mRNA and protein expression were measured by RT-PCR and immunohistochemistry techniques, respectively. RESULTS: By down-regulating the expression of ICAM-1 protein and mRNA and alleviating inflammation in cerebral ischemic region, erigeron exerted a protective effect in cerebral ischemia and reperfusion. CONCLUSION: The results suggest that erigeron protects the brain against cerebral ischemia and reperfusion injury via inhibiting ICAM-1 expression. [