雷帕霉素抗神经胶质瘤的活性及其机制

被引:3
作者
宋和勇
马春兰
薛婷
燕楠
机构
[1] 青海省第五人民医院
关键词
雷帕霉素; 神经胶质瘤; mTOR信号通路; survivin;
D O I
暂无
中图分类号
R739.41 [颅内肿瘤及脑肿瘤];
学科分类号
100115 [医学神经生物学];
摘要
目的探讨雷帕霉素抗神经胶质瘤的肿瘤活性及其相关作用机制。方法 MTT细胞毒实验检测雷帕霉素对神经胶质瘤细胞C6的生长抑制活性,Annexin V/PI双染流式细胞仪检测细胞凋亡的发生,PI单染流式细胞仪检测细胞周期的变化,提取细胞总RNA,RT-PCR检测survivin mRNA的表达变化,提取细胞总蛋白Western印迹检测survivin蛋白的表达变化。结果雷帕霉素对神经胶质瘤细胞C6显示了高效的抗肿瘤活性,IC50值为(8.34±0.62)μmol/L。流式细胞仪凋亡分析显示0、5、10、20μmol/L雷帕霉素作用C6细胞48 h后,细胞的凋亡率分别为(3.56%±1.04%)、(13.34%±3.86%)、(22.84%±4.53%)、(51.91%±6.29%),各组间有统计学差异(P<0.01)。细胞周期分析显示0、5、10、20μmol/L雷帕霉素处理C6细胞48h后,细胞增殖指数分别为(64.54%±6.04%)、(50.24%±4.86%)、(39.26%±5.61%)、(30.08%±6.42%)。RT-PCR和Western印迹检测显示雷帕霉素可以下调survivin mRNA和蛋白的表达。结论雷帕霉素具有高效的抗神经胶质瘤活性,其作用机制可能与其抑制了m TOR信号通路下调survivin靶蛋白的表达有关。
引用
收藏
页码:4202 / 4204
页数:3
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