发展性cis-regulatory元素的多重分析与定量单细胞表达报告器
Jean-Benoît Lalanne1, Samuel G Regalado1, Silvia Domcke1
1Department of Genome Sciences, University of Washington, Seattle, WA, USA.
Nature methods
|May 9, 2024
概括
研究人员开发了一种新方法,可以精确测量发育中的细胞中的基因活性. 这一突破使得复杂的生物系统中可扩展的,高分辨率的Cis调节元件 (CREs) 分析成为可能.
科学领域:
- 基因组学就是基因组学.
- 发展生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 在多细胞系统中以规模和精确度测量 cis-regulatory element (CRE) 活性是基因组学中的一个重大挑战.
- 现有的多重单细胞报告测定方法在检测和量化方面存在局限性.
- 准确地描述CREs对于理解发育过程至关重要.
研究的目的:
- 开发一种新型的记者测定方法,用于在多细胞系统中的单细胞中可扩展和精确测量CRE活性.
- 克服在量化发育CREs的瓶.
- 为了使高通量选和CREs的表征.
主要方法:
- 开发一套双RNA磁带系统,以分离在报告测试中的检测和量化.
- 通过循环化利用RNA条形码稳定,以提高记者稳定性和读数.
- 在早期哺乳动物发育的体外模型中,该试验的应用用于选200多个可访问的染色质区域.
- 对具有扰乱转录因子结合位点的CRE仿真对和CRE变异的分析.
主要成果:
- 开发的记者测定方法在多个数量级上提供了准确的测量,精度接近波桑极限.
- 鉴定了13种发育性CREs,包括8种以前未被描述的CREs,具有自主和细胞类型特定的活动.
- 证明,嵌合式CRE对可以在两种细胞类型中产生不同的活动概况.
- 从修改后的CRE中评估功能增益和功能丧失的表型.
结论:
- 单细胞定量表达报告器提供了一个可扩展,高灵敏度和高分辨率的方法,用于表征原生,扰乱和合成CREs.
- 这项技术显著提高了在发育和多细胞环境中研究CRE功能的能力.
- 这些发现为管理早期哺乳动物发育的调节机制提供了新的见解.
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