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早期前脑连接:使用条件Celsr3突变小鼠进行基因剖析.

Libing Zhou1, Isabelle Bar, Younès Achouri

  • 1Developmental Neurobiology, Université Catholique de Louvain, 1200 Bruxelles, Belgique.

Science (New York, N.Y.)
|May 20, 2008
PubMed
概括

细胞粘附分子Celsr3对于哺乳动物的轴突通道形成至关重要. 它的局部无活化揭示了它在指导神经元和支持细胞正确途径发育中的重要作用.

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科学领域:

  • 神经科学是一个神经科学.
  • 发展生物学 发展生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 轴突通道的形成对于神经电路的发展至关重要.
  • 已知Celsr3基因在大脑发育中起着重要作用.
  • 之前的研究表明,Celsr3在轴突指导中的重要性.

研究的目的:

  • 研究Celsr3在轴突通道形成过程中在不同大脑区域的特定作用.
  • 了解Celsr3在神经元和周围细胞中的功能.
  • 确定轴突发育中的Celsr3依赖和独立路径.

主要方法:

  • 生成一个有条件的Celsr3淘汰赛小鼠模型.
  • 在特定的大脑区域 (半脑,腹前脑,皮层) 中,Celsr3基因的区域性失活.
  • 对轴突通道发育的分析,包括前部部位和内部囊.

主要成果:

  • 条件 Celsr3 无活化在脑前脑,腹前脑或皮质中,破坏了特定的轴突通道.
  • 在神经元中,Celsr3对于向前脑和脑下目标投射的神经元至关重要.
  • 在细胞中,Celsr3也是指导轴突通过内部囊的关键.
  • 皮层特异性无活化损害了脑下线的投射,但并没有损害皮质体的轴突,这表明了其他指导线索.

结论:

  • 生长和指导杆细胞之间的Celsr3介导的相互作用对于哺乳动物轴突通道的形成至关重要.
  • 这项研究提供了体内证据,证明Celsr3在引导不同轴突群体中的多方面的作用.
  • 存在不同的指导机制,Celsr3独立的线索支持某些投射,如皮质体轴突.