微管相关蛋白1B(microtubule associated protein 1B,MAP1B)是神经细胞骨架蛋白的重要成分,广泛表达于中枢及外周神经系统,分布于神经元胞体、轴突、树突和突触部位,可以调节微管动力学状态并促进微管聚合成束,对轴突导向、延长及突触...微管相关蛋白1B(microtubule associated protein 1B,MAP1B)是神经细胞骨架蛋白的重要成分,广泛表达于中枢及外周神经系统,分布于神经元胞体、轴突、树突和突触部位,可以调节微管动力学状态并促进微管聚合成束,对轴突导向、延长及突触发育起重要作用。本文对MAP1B的基因、生物化学特性、磷酸化调节、轴突导向作用、突触塑型作用及其与神经系统疾病的关系进行综述。展开更多
Objective To explore the regulatory effect of fragile X mental retardation protein （FMRP） on the translation of microtubule associated protein 1B （MAP1B）. Methods The expressions of MAP1B protein and MAP1B mRNA in...Objective To explore the regulatory effect of fragile X mental retardation protein （FMRP） on the translation of microtubule associated protein 1B （MAP1B）. Methods The expressions of MAP1B protein and MAP1B mRNA in the brains of 1-week and 6-week old fragile X mental retardation-1 （FmrI） knockout （KO） mice were investigated by immunohistochemistry, Western blot, and in situ hybridization, with the age-matched wild type mice （WT） as controls. Results The mean optical density （MOD） of MAP1B was significantly decreased in each brain region in KO6W compared with WT6W, whereas in KO1W, this decrease was only found in the hippocampus and cerebellum. MAP1B in 6-week mice was much less than that in 1-week mice of the same genotype. The results of Western blot and in situ hybridization showed that MAP1B protein and MAP1B mRNA were significantly decreased in the hippocampus of both KO1W and KO6W. Conclusion The decreased MAP1B protein and MAP1B mRNA in the Fmrl knockout mice indicate that FMRP may positively regulate the expression of MAP1B.展开更多
文摘微管相关蛋白1B(microtubule associated protein 1B,MAP1B)是神经细胞骨架蛋白的重要成分,广泛表达于中枢及外周神经系统,分布于神经元胞体、轴突、树突和突触部位,可以调节微管动力学状态并促进微管聚合成束,对轴突导向、延长及突触发育起重要作用。本文对MAP1B的基因、生物化学特性、磷酸化调节、轴突导向作用、突触塑型作用及其与神经系统疾病的关系进行综述。
文摘Objective To explore the regulatory effect of fragile X mental retardation protein （FMRP） on the translation of microtubule associated protein 1B （MAP1B）. Methods The expressions of MAP1B protein and MAP1B mRNA in the brains of 1-week and 6-week old fragile X mental retardation-1 （FmrI） knockout （KO） mice were investigated by immunohistochemistry, Western blot, and in situ hybridization, with the age-matched wild type mice （WT） as controls. Results The mean optical density （MOD） of MAP1B was significantly decreased in each brain region in KO6W compared with WT6W, whereas in KO1W, this decrease was only found in the hippocampus and cerebellum. MAP1B in 6-week mice was much less than that in 1-week mice of the same genotype. The results of Western blot and in situ hybridization showed that MAP1B protein and MAP1B mRNA were significantly decreased in the hippocampus of both KO1W and KO6W. Conclusion The decreased MAP1B protein and MAP1B mRNA in the Fmrl knockout mice indicate that FMRP may positively regulate the expression of MAP1B.
