电针对局灶性脑缺血再灌注大鼠细胞间黏附分子-1表达的影响

目的：研究电针对局灶性脑缺血再灌注大鼠ICAM-1表达的影响。方法：采用SD大鼠80只，随机分为正常对照组、假手术组、模型组、电针组，每组20只。采用大脑中动脉线栓法制备MCAO缺血再灌注模型，神经功能障碍评分参照Zea—Longa评分标准；分别应用免疫组化SABC方法检测脑缺血再灌注大鼠缺血脑区微血管内皮细胞ICAM-1的表达和ELISA法检测外周血中sICAM-1含量及电针对其的影响。结果：脑缺血再灌注后，缺血脑区微血管内皮细胞CAM-1表达水平和外周血中sICAM-1含量均增高（模型组与正常组、假手术组比较P〈0．01）；电针治疗后缺血脑区微血管内皮细胞ICM-1表达水平和外周血中sICAM-1含量下调（电针组与模型组比较P〈0．05）。结论：脑缺血再灌注后缺血脑区微血管内皮细胞释放ICAM-1，对脑组织产生炎性损伤；电针治疗可减少ICAM-1的表达，从而发挥脑保护作用。

EFFECTS OF ELECTROACUPUNCTURE ON EXPRESSION OF INTERCELLULAR ADHESION MOLECULE-1 IN THE RAT OF LOCAL CEREBRAL ISCHEMIA-REPERFUSION

Objective To investigate effects of electroacupuncture (EA) on expression of intercellular adhesion molecule-1 (ICAM-1) in the rat of local cerebral ischemia-reperfusion. Methods Eighty SD rats were randomly divided into a normal control group, a sham operation group, a model group and an EA treatment group, 20 rats in each group. The thread-obstruction method was used for preparation of ischemia-reperfusion model. Zea-Longa rating criteria were used for evaluation of nervous function disorder; Immunohistochemical SABC method was used for detection of ICAM-1 expression in the microvascular endothelial cell of the ischemic brain region, and ELISA method for the soluble ICAM-1 (sICAM-1) content in peripheral blood. Results After cerebral ischemia-reperfusion, both ICAM-1 expression level in the microvascular endothelium cell of the ischemic brain region and sICAM-1 content in the peripheral blood significantly increased in the model group as compared with the normal group and the sham operation group (P<0.01); After EA treatment, the ICAM-1 expression level in the microvascular endothelial cell of the ischemic brain region and sICAM-1 content in the peripheral blood were significantly down-regulated in the EA treatment group as compared with the model group (P<0.05). Conclusion After cerebral ischemia-reperfusion, the microvascular endothelial cell of the ischemic brain region releases ICAM-1, which induces inflammatory injury of cerebral tissues; EA treatment can decease the expression of ICAM-1, so as to prevent the brain from the injury.