PCM1协调中心体不对称性与极化内分体动态,以调节子细胞命运
Xiang Zhao1,2, Vincent Mouilleau3, Yiqi Wang4
1Department of Bioengineering and Therapeutic Sciences, Pharmaceutical Chemistry, Programs in Biological Sciences and Quantitative Biosciences, Institute of Human Genetics, Kavli Institute for Fundamental Neuroscience, Bakar Aging Research Institute, University of California, San Francisco, California, USA. xiang.zhao@czbiohub.org.
Nature communications
|November 28, 2025
概括
周心质物质1 (Pcm1) 通过控制放射性质原生细胞如何分裂来调节大脑发育. Pcm1通过将中心体不对称性与内体体贩运联系起来,确保适当的细胞命运,保持祖先的自我更新.
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体 (RGP) 通过不对称细胞分裂 (ACD) 平衡自我更新和分化.
- 不平等的中心体遗传对ACD至关重要,但指导细胞命运的潜在机制仍然不清楚.
- 了解中心体不对称如何影响细胞命运对于理解大脑发育至关重要.
研究的目的:
- 为了确定关键分子参与调节细胞命运决策在RGP不对称细胞分裂期间.
- 阐明中心体不对称性指导脊椎动物RGP细胞命运的机制.
- 研究围心物质1 (Pcm1) 在RGP自我更新和分化中的作用.
主要方法:
- 在斑马鱼胚胎中的体内时间延迟成像.
- 纳米级分辨率扩展显微镜.
- 生物化学试验用于研究蛋白质相互作用和内分体动力学.
主要成果:
- 在胚胎RGP中的母中心体上,Pcm1与Cep83不对称地局部化.
- Pcm1与含有诺奇联体的内体相结合,并与Par-3和dynein相互作用.
- 丢失Pcm1会扰乱内体运输,导致神经元分化增加和RGP自我更新减少.
- Pcm1促进Rab5b向Rab11a的过渡,并促进大分子复合体在循环内分泌体上的组合.
- 在人类皮质大脑器官中观察到保留的PARD3-PCM1-CEP83-RAB11关联.
结论:
- 在RGP中,PCM1起到中心体不对称性和极化内分体贩运之间的关键联系作用.
- Pcm1通过调节内体动力学来调节RGP命运决策,从而平衡自我更新和分化.
- 已识别的PCM1依赖性途径在物种中得到保护,突出显示了它在脊椎动物大脑发育中的基本作用.
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