在外周听力系统中,Rac1和Nectin3对于PCP导向的轴突引导至关重要
Shaylyn Clancy1, Nicholas Xie1, Tess Eluvathingal Muttikkal1
1Department of Cell Biology, University of Virginia Health System, Charlottesville, VA, 22903, United States.
bioRxiv : the preprint server for biology
|June 19, 2024
概括
平面细胞极性 (PCP) 途径调节螺旋质神经元 (SGN) 的发育. 这项研究确定Nectin3和Rac1是控制SGN轴突导向的关键下游效应因子.
科学领域:
- 神经科学是一个神经科学.
- 发育生物学 发展生物学
- 细胞生物学 细胞生物学
背景情况:
- 螺旋质神经元 (SGN) 对于听力至关重要,连接听觉受体与大脑.
- 第二种类型的SGN (SGNII) 内化外部毛细胞,并表现出特定的发育转变行为.
- 已知平面细胞极性 (PCP) 途径会影响SGNII afferent转向,但其分子机制尚不清楚.
研究的目的:
- 阐明PCP途径调节SGNII afferent轴突引导的下游分子机制.
- 为了确定特定的基因和蛋白质参与SGNII转换中介环境线索.
- 了解耳支细胞在SGNII发育中的作用.
主要方法:
- 在小鼠模型中进行体内遗传分析.
- 对基因定位和蛋白质相互作用的研究.
- 表观性分析以确定遗传通路的关系.
主要成果:
- 核心PCP基因Vangl2调节了Rac1和Nectin3在耳支细胞中的定位.
- 在Rac1或Nectin3的损失部分回顾了在Vangl2突变体中观察到的SGNII转向缺陷.
- 在SGNII转换中,Rac1通过影响PCP蛋白位址,发挥非自主作用.
结论:
- 在SGNII轴突引导中,Nectin3和Rac1是PCP通路的新型下游影响者.
- 这些分子调节支持细胞中的细胞粘附和细胞骨动态,指导SGNII afferents.
- 这些发现揭示了PCP导向的轴突路径寻找在发育中的尾细胞中保存的机制.
关键词:
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