PTK7/CCK-4是脊椎动物平面细胞极性的一种新型调节剂
Xiaowei Lu1, Annette G M Borchers, Christine Jolicoeur
1Department of Biological Sciences, Howard Hughes Medical Institute, Stanford, California 94305, USA.
Nature
|July 2, 2004
概括
蛋白氨酸激酶7 (PTK7) 是脊椎动物平面细胞极性 (PCP) 的新型调节剂. PTK7突变破坏神经管的闭合和毛细胞的方向,突出其在组织发育中的关键作用.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 平面细胞极性 (PCP) 路径在上皮细胞中建立组织极性,在物种之间保持.
- 关键的PCP基因,如纹和乱,是已知的Drosophila中的调节者.
- 在脊椎动物中,PCP影响神经管闭合和感官毛细胞发育.
研究的目的:
- 为了研究蛋白质氨酸激酶7 (PTK7) 在脊椎动物平面细胞极性中的作用.
- 确定PTK7在神经管闭合和感官毛细胞方向方面的功能.
主要方法:
- 对一只小鼠突变PTK7基因的分析.
- 用vangl2突变小鼠进行遗传相互作用研究.
- 在毛细胞极化过程中对PTK7的局部化研究.
- 开发中的Xenopus PTK7同类体的功能研究.
主要成果:
- PTK7突变破坏了小鼠的神经管的闭合和立体状束的方向.
- PTK7表现出与vangl2的遗传相互作用,这是已知的PCP成分.
- 在毛细胞极化过程中,PTK7表现出动态局部化.
- 克森诺普斯PTK7对于神经收延伸和神经管闭合至关重要.
结论:
- PTK7被确定为脊椎动物平面细胞极性的一种新型调节剂.
- PTK7在脊椎动物胚胎发育中起着至关重要的作用,特别是神经管形成和感觉器官发育.
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