植物雌激素对去势雌性大鼠缺血性脑损伤的神经保护作用Neuroprotective Effects of Phytoestrogen and Estrogen against Neuronal Injury in Focal Cerebral Ischemia of Female Rats
么晓轶,李颖
摘要(Abstract)：
目的对比研究植物雌激素和动物雌激素对去势雌性SD大鼠永久性局灶性脑缺血组织的神经保护作用。方法采用线栓法建立右侧永久性大脑中动脉阻断模型。缺血24h后立即断头取脑,冠状切片,HE染色后于光镜下观察缺血侧大脑皮层的病理变化,应用免疫组化法检测不同实验组大鼠缺血侧Cfos表达情况,以DNA缺口末端标记法原位检测细胞凋亡,通过TTC染色比较脑梗死体积百分比。结果动物雌激素(17β雌二醇)组及植物雌激素(葛根素)组与生理盐水组相比,光镜下正常神经细胞密度显著增加,缺血侧C-fos表达阳性的细胞数明显减少,凋亡细胞数显著减少,脑梗死体积百分比也明显缩小(P<0.05)。两种雌激素相比,上述4项指标差异均无显著性(P>0.05)。结论两种雌激素对缺血性脑损伤均有保护作用,可减弱大脑缺血梗死灶边缘区的Cfos表达,从而延缓神经细胞凋亡。这可能是雌激素脑保护作用的机制之一。
关键词(KeyWords)： 雌激素;植物雌激素;脑缺血;神经保护作用;C-fos;细胞凋亡
基金项目(Foundation):
作者(Author): 么晓轶,李颖
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