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使用基于毛细血管的微解剖系统对脑器官进行微区域转录学分析.

Kaiqiang Ye1, Yunxia Guo1,2, Ning Chang1

  • 1State Key Laboratory of Digital Medical Engineering, School of Biological Science & Medical Engineering, Southeast University, Nanjing, Jiangsu, China. xwzhao@seu.edu.cn.

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一个新的基于毛细血管的系统有效地将微区域与大脑器官分离出来,用于空间转录学 (ST). 这种方法绘制细胞类型和基因表达的地图,揭示神经前细胞和星体细胞的发育变化.

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科学领域:

  • 神经科学是一个神经科学.
  • 基因组学就是基因组学.
  • 发展生物学 发展生物学

背景情况:

  • 在转录学中保存空间信息对于理解细胞命运至关重要.
  • 对于空间转录学 (ST) 来说,对感兴趣的微区域 (mROI) 的精确隔离是具有挑战性的.

研究的目的:

  • 开发一种有效的方法,用于大脑器官的空间转录学分析.
  • 在特定的mROI中描述细胞组成和基因表达.
  • 为了研究大脑器官的空间发育轨迹.

主要方法:

  • 建立了基于毛细血管的组织微解剖系统 (CMS) 来获取mROI.
  • 在从大脑有机体中分离的mROI上进行mRNA测序 (CMS-seq).
  • 标注细胞类型 (NPC,IP,神经元,星细胞) 和分析不同发育阶段 (20日和60日) 的基因表达.
  • 利用基因本体学 (GO) 和KEGG途径分析用于差异表达的基因.

主要成果:

  • 从使用CMS培养的大脑器官中成功获得mROI.
  • 在第20天和第60天注释神经前体细胞,中间前体,成熟神经元和星体细胞.
  • 在不同阶段的星细胞中观察到不同的基因表达模式 (SPARC在第20天,NTRK2在第60天).
  • 通过GO和KEGG分析,在第60天确定了神经发育的增加.
  • 为mROIs构建了一个空间单元类型的注释地图.

结论:

  • 开发的CMS提供了一种有效的方法,用于在脑器官中进行ST分析.
  • 这种技术可以在有机体内详细地绘制细胞类型和基因表达.
  • 这项研究促进了对大脑空间发育轨迹的进一步探索.