多重,单细胞CRISPRa查细胞类型特定的监管元素
Florence M Chardon1,2, Troy A McDiarmid1,2, Nicholas F Page3,4,5
1Department of Genome Sciences, University of Washington, Seattle, WA, USA.
Nature communications
|September 18, 2024
概括
这项研究介绍了一种基于CRISPR的基因激活 (CRISPRa) 框架,使用单细胞RNA测序来绘制细胞类型特定基因调节的地图. 该方法识别了可以精确控制特定细胞类型中的基因表达的调控元素,包括与神经发育障碍相关的基因表达.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 基因规则 基因规则
背景情况:
- 基于CRISPR的基因激活 (CRISPRa) 能够对基因表达进行有针对性的上调.
- 识别细胞类型特定的调控元素对于理解基因控制至关重要.
- 现有的方法缺乏分辨率,无法在不同类型的细胞中绘制精确的调节元件功能.
研究的目的:
- 开发和验证一个实验框架来识别特定于细胞类型的CRISPRa-响应性cis-regulatory元素.
- 发现能精确控制特定基因区域内邻近基因的表达的调节元件.
- 用CRISPRa.来研究增强剂活性的细胞类型特异性.
主要方法:
- 一个高度多重化的CRISPRa扰动系统与单细胞RNA测序 (sc-RNA-seq) 相结合.
- 随机组合的指导RNA (gRNAs) 针对候选 cis-调节元素被引入细胞.
- 细胞使用sc-RNA-seq进行了剖析,并分析了扰动,以评估测试对照组对基因表达的影响.
主要成果:
- 该框架成功识别了gRNAs,这些gRNAs专门调高了预期的基因,而不会影响1Mb内的邻近基因.
- 克里斯普拉α反应增强剂表现出细胞类型特异性的活性,表明细胞环境的依赖性.
- 使用这种方法实现了神经元中六个自闭症谱系障碍 (ASD) 和神经发育障碍 (NDD) 风险基因的升级.
结论:
- 开发的框架可以有效地发现细胞类型特定的调节元素及其向基因.
- 增强剂的活性高度依赖于细胞类型,受染色体格局和转化作用因子的影响.
- 这种方法促进了对CRISPR的大规模查,这些工具可以激活具有精确细胞类型特异性的基因.
相关概念视频
CRISPR
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
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Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
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CRISPR/Cas9 Genome Editing
The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...


