伽玛刀照射癫痫大鼠海马神经元超微结构及线粒体计量分析

目的观察低剂量伽玛刀照射对癫大鼠海马神经元超微结构的影响。方法建立大鼠青霉素局灶性癫动物模型,将58只SD大鼠分为对照组、癫模型组和伽玛刀照射组。对大鼠行伽玛刀照射,照射中心剂量24 Gy、周边剂量12 Gy、等剂量曲线50%,术后3 h～60 d取靶区海马,透射电镜观察并采用图像分析系统对线粒体形态进行计量分析。结果对照组细胞结构基本正常;癫模型组可见神经元细胞器明显空化,线粒体体密度、数密度、比表面和嵴膜密度较对照组明显减少(均P<0.05),线粒体平均体积和平均截面积较对照组明显增大(均P<0.05)。伽玛刀照射组早期线粒体的平均体积、平均截面积、数密度、比表面与对照组相比差异显著(均P<0.05),中期和晚期线粒体各项参数与对照组相比差异不显著。结论大鼠癫发作早期线粒体形态结构变化明显,低剂量伽玛刀照射对神经元修复起重要作用。

Cell ultrastructural changes and quantitative analysis of mitochondria in hippocampal neurons of epilepsy rats after the treatment of gamma knife radiation

Objective To observe the effect of low-dose gamma knife radiation on ultrastoructure in hippocampal neurons of epilepsy rats.Methods The rat models of epilepsy were established by injection of penicillin into the cortex.Fifty eight rats were randomly divided into control group,epilepsy model group and low-dose gamma knife radiation group.The radiation was carried out with a central dose of 24 Gy,a peripheral dose of 12 Gy and isodose curve of 50%.The rat hippocampal samples were taken 3 h to 60 d after the ...