在调节子细胞命运的过程中,PCM1传达了中心体不对称性到极化内体体动力学
bioRxiv : the preprint server for biology
|July 1, 2024
概括
神经干细胞中的中心体不对称性是由围心物质1 (Pcm1) 调节的. Pcm1控制内体动力学和Notch信号,影响细胞分裂和命运.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
背景情况:
- 脊椎动物的放射性质原始细胞 (RGP) 是神经干细胞,对大脑发育至关重要.
- 为了自我更新和差异化,RGP以不对称的方式分裂 (ACD).
- 在RGP ACD中观察到中心体不对称性,但其与子细胞命运的机制联系尚不清楚.
研究的目的:
- 调查中心细胞不对称性在调节RGP命运中的作用.
- 确定将中心体不对称性与细胞分裂和分化联系起来的分子机制.
- 探索神经前细胞中围心物质1 (Pcm1) 的功能.
主要方法:
- 斑马鱼胚胎RGP的体内时间延迟成像.
- 纳米级分辨率扩展显微镜.
- 对原始细胞的克隆分析.
- 对人类诱导的多能干细胞衍生的脑器官的分析.
主要成果:
- Pcm1在中心体分布不对称,并定位到含有Notch配体的内体体.
- Pcm1与极性调节器Par-3和dynein电机相互作用.
- 丢失Pcm1会扰乱内分体的动态,导致神经元的产生增加.
- Pcm1促进了Rab5b到Rab11a内体标记物交换和Par-3/dynein复合体的形成.
- 在人类神经祖先中观察到PCM1不对称性和与PARD3和RAB11A的同定位.
结论:
- Pcm1传达了中心体不对称性,以极化内分体动力学.
- Pcm1调节了参与ACD的Notch信号通路.
- 这个机制控制RGP的命运,平衡自我更新和差异化.
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