在直接重编程中对血统和身份进行单细胞映射
Brent A Biddy1,2,3, Wenjun Kong1,2,3, Kenji Kamimoto1,2,3
1Department of Developmental Biology, Washington University School of Medicine in St Louis, St Louis, MO, USA.
Nature
|December 7, 2018
概括
这项研究引入了CellTagging,一种在重新编程过程中追踪细胞谱系的新方法. 细胞标记揭示了不同的重编程路径,并确定了Mettl7a1作为成功细胞身份转换的关键.
科学领域:
- 细胞生物学
- 发育生物学
- 遗传学
背景情况:
- 直接血统重新编程可以转换细胞的身份, 但异质性使得轨迹分析复杂.
- 现有的单细胞技术在处理过程中经常丢失关键的血统信息.
- 重建细胞轨迹需要保存身份和克隆历史的方法.
研究的目的:
- 开发一种组合细胞索引方法,同时捕获克隆史和细胞身份.
- 在直接细胞重编程过程中构建多层次的血统树.
- 研究纤维细胞的动态和异质性,以诱导内皮原生细胞的重编程.
主要方法:
- 开发了"细胞标记",一种使用序列细胞标记的组合细胞索引方法.
- 应用CellTagging用于纤维细胞的纵向跟踪以诱导内皮原生细胞的重新编程.
- 分析细胞身份和克隆史以重建血统关系.
主要成果:
- 确定了两个不同的重编程轨迹:一个成功的,一个"死胡同"的状态.
- 确定在血统转换的早期建立了轨迹路径.
- 发现Mettl7a1的表达与成功的重编程相关,并且在添加到重编程尾酒时增强诱导的内皮祖先产量.
结论:
- 细胞标记有效地捕捉了克隆史和细胞身份,从而实现了详细的血统追踪.
- 该方法揭示了直接重编程过程的动态和异质性的关键见解.
- Mettl7a1被认为是促进成功直系重编程的关键因素.
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