Cdk-5过度表达对Tau蛋白磷酸化的影响

被引:6
作者
陈娟
李宏莲
王建枝
冯友梅
机构
[1] 华中科技大学同济医学院生物化学与分子生物学系
[2] 华中科技大学同济医学院解剖学系
[3] 华中科技大学同济医学院病理生理学系
[4] 华中科技大学同济医学院生物化学与分子生物学系 武汉
[5] 武汉
关键词
细胞周期蛋白依赖性蛋白激酶5; 微管相关蛋白; 阿尔茨海默病;
D O I
暂无
中图分类号
R749.16 [];
学科分类号
100203 ;
摘要
目的 实验旨在细胞水平研究cdk 5过度表达对微管相关蛋白tau的磷酸化的影响。方法 利用基因转染技术建立过度表达cdk 5的鼠成神经瘤细胞株 (N2a细胞株 ) ,免疫沉淀及酶活性检测法检测cdk 5的酶活性 ,免疫荧光技术和免疫印迹技术检测细胞内tau蛋白的磷酸化状况。结果 在N2a细胞株转染组中 ,cdk 5表达增加 ,并使得抗体tau 1显色减弱 ,PHF 1显色增强 ,提示tau蛋白在Ser199/ 2 0 2 ,Ser396 / 4 0 4位点过度磷酸化。与此同时 ,cdk 5酶活性较未转染组提高 3 5倍。结论 这些结果提示细胞水平的cdk 5的过度表达会导致cdk 5酶活性增加和tau蛋白过度磷酸化 ,而过度磷酸化的tau蛋白可能参与了AD的病理过程。
引用
收藏
页码:174 / 179
页数:6
相关论文
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