在整个胚胎和产后小鼠视觉皮层发育过程中,细胞类型的持续多样化
Yuan Gao1, Cindy T J van Velthoven1, Changkyu Lee1
1Allen Institute for Brain Science, Seattle, WA, USA.
bioRxiv : the preprint server for biology
|January 20, 2025
概括
这项研究绘制了开发小鼠视觉皮层细胞类型的地图,使用单细胞转录组学和表观组学. 它揭示了细胞在整个发育过程中不断的细胞多样化和分子调节,揭示了细胞身份改进背后的逻辑.
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
- 基因组学就是基因组学.
背景情况:
- 哺乳动物皮层发育涉及多种细胞类型和时间调节的事件.
- 细胞类型发育的机制尚未完全理解.
- 单细胞转录组学可以在发育过程中对细胞类型进行系统的研究.
研究的目的:
- 创建一个高分辨率的转录基因和表观基因地图,对小鼠视觉皮层的发展.
- 在整个发育过程中绘制细胞类型的出现和多样化.
- 识别分子特征和调控机制,推动细胞身份的精细化.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 的568,674个细胞.
- 单核多原子测序 (snMultiome) 194,545个核的转录和染色体可访问性.
- 发展轨迹的计算重建.
- 对基因表达和染色质可访问性动态的分析.
主要成果:
- 从胚胎到产后阶段的激发性,抑制性和非神经元细胞类型的综合图谱 (E11.5-P56).
- 识别新细胞类型出现的分支点和多样化的分子特征.
- 在产后观察到持续的细胞类型细化,在眼睛开放和关键时期出现迟.
- 基因表达和染色体可访问性之间的动态相互作用,识别调节元素和转录因子.
- 证明单个基因可以通过细胞类型和发育阶段的多个元素来调节.
结论:
- 该研究提供了开发视觉皮层细胞类型的最详细的动态分子地图.
- 它揭示了细胞类型不断改进的基础分子逻辑.
- 这些发现为控制皮层发育和细胞身份形成的复杂过程提供了洞察力.
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