目的探讨电针预处理对大鼠脑缺血再灌注损伤后神经功能的影响及其机制。方法雄性Sprague-Dawley大鼠36只随机分为假手术组(n=12)、模型组(n=12)和电针预处理组(n=12)。后两组线栓法制备大鼠脑缺血2 h再灌注模型。电针预处理组在缺血前给予电针百会干预2周。再灌注24 h后,采用改良神经功能缺损评分进行评定,HE染色观察缺血侧脑组织脑损伤程度,Western blotting检测脑缺血半暗区Tolls样受体4 (TLR4)、核转录因子κB (NF-κB)蛋白表达。结果与模型组比较,电针预处理组神经功能缺损评分降低(P<0.05),脑组织损伤程度减轻,缺血半暗区TLR4、NF-κB蛋白表达下调(P<0.05)。结论电针预处理通过下调缺血半暗区TLR4、NF-κB蛋白表达,诱导脑保护作用,降低炎性损伤程度,改善脑缺血再灌注损伤后大鼠的神经功能。
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