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Effects of Wnt-1 on the differentiation of anterior subventricular zone neural stem cells in vitro
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF NEUROSURGERY
- Issue:
- 7
- DOI:
- 10.3760/j.issn:1001-2346.2005.07.006
- Key Word:
- 神经干细胞;Wnt-1;室管膜前下区;分化
Abstract： 目的探讨室管膜前下区(anterior subventricular zone,SVZa)神经干细胞体外分化过程中,Nestin和Wnt-1表达的变化,以及Wnt-1对SVZa神经干细胞体外分化的影响.方法以免疫荧光染色方法观察在SVZa神经干细胞体外分化过程中,Nestin和Wnt-1在不同时间点的表达水平,同时以基因转染方法增强SVZa神经干细胞Wnt-1表达,观察Nestin、Wnt-1和Mash-1的表达以及神经元分化比例的改变.结果 (1)Nestin主要表达于SVZa神经干细胞分化的早期阶段,随着细胞的分化和成熟,Nestin的表达迅速减弱.(2)SVZa神经干细胞贴壁分化2h即有Wnt-1表达,其表达高峰在细胞分化开始后12h,以后随着细胞分化的进行而迅速降低.(3)SVZa神经干细胞转染Wnt-1基因后,Nestin的表达减弱,Mash-1的表达增强,神经元的分化比例增高,Mash-1的增强与神经元分化之间有很高的一致性.结论 (1)Wnt-1表达于SVZa神经干细胞分化过程之中,在细胞分化成熟后则不表达,Wnt-1可能参与调节SVZa神经干细胞的体外分化,并可作为神经干细胞处于分化状态的标志.(2)SVZa神经干细胞转染Wnt-1后表达Mash-1增强,并更多分化为神经元,Wnt-1可能通过Mash-1途径促使SVZa神经干细胞向神经元方向分化.
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