鼠缺血脑组织中Fas抗原表达及细胞凋亡的动态研究

Dynamic Study of Fas Expression and Cell Apoptosis in the Cerebral Ischemic Tissues

目的 :探讨脑缺血后Fas抗原表达及与细胞凋亡的关系。方法 :以鼠局灶脑缺血为动物模型 ,在缺血后不同时间点 (30min ,6 0min ,2 4h ,3d ,7d)分别以免疫组化法和TUNEL法动态检测Fas抗原表达和细胞凋亡情况。结果 :缺血后 30min ,Fas抗原呈阳性表达 ,6 0min至高峰 ,2 4h开始回落 ,3d时已为阴性。TUNEL阳性细胞于缺血后 6 0min开始出现 ,3d达高峰。 1周时有回降。结论 :脑缺血后有细胞凋亡发生 ,Fas抗原的大量表达与神经细胞凋亡有密切关系。

Objective: Our purpose was to study the relationship between the Fas antigen expression and neuron apoptosis after cerebral ischemia. Methods: We detected the Fas antigen expression and neuron apoptosis dynamically in the animal models with cerebral ischemia by immunohistochemistry and terminal deoxynucleotidyl transferase mediated dUTP biotin nick end labeling (TUNEL) method. Results: Fas antigen was positive after 30 minutes of ischemia and reached peak at 60 minutes. At the 24th hour, it began to decrease, and negative on the 3th day. While the positive cell for TUNEL method appeared after 60 minutes of ischemia, reached peak on 3 day, and decreased on 7 day. Conclusion: Neuron apoptosis after cerebral ischemia is closely related to the over expression of Fas antigen.