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在单细胞CRISPR屏幕中使用CLEANSER对环境gRNA进行表征和生物信息过
Siyan Liu1, Marisa C Hamilton2, Thomas Cowart3
1Computational Biology and Bioinformatics Program, Duke University, Durham, NC, USA; Center for Advanced Genomic Technologies, Duke University, Durham, NC USA.
Cell genomics
|February 6, 2025
概括
在CRISPR屏幕中的环境gRNAs会引起噪音. 我们开发了CLEANSER,一种用于过这些污染物的新方法,提高了单细胞RNA测序实验中的基因表达分析准确度.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 生物信息学是一种生物信息学.
背景情况:
- Perturb-seq是一种单细胞RNA测序CRISPR查方法,可以进行高通量基因组调查.
- 环境导向RNAs (gRNAs) 是噪声的重要来源,导致这些实验中的错误阳性gRNA分配.
研究的目的:
- 在扰乱-seq屏幕中对环境gRNA进行表征.
- 开发一种用于过环境gRNA和减少噪音的计算方法.
- 评估环境gRNA过对下游分析的影响.
主要方法:
- 采用CRISPR场测试来识别和量化环境gRNAs.
- 开发了CLEANSER (用于增强单细胞RNA-seq的CRISPR图书馆评估和环境噪声抑制),这是环境gRNA过的混合模型.
- 在CLEANSER中纳入了gRNA和细胞特异性规范化参数,以纠正技术变异.
主要成果:
- 清洁器有效地过环境gRNA,减少扰动序列数据中的噪声.
- 该方法提供了gRNA细胞分配的概率,区分本地和环境分布.
- 环境gRNA过显著影响差异性基因表达分析结果.
- 与替代方法相比,CLEANSER在提高跨各种屏幕格式的gRNA细胞分配精度方面表现出卓越的性能.
结论:
- 清洁器是一种有效的工具,用于提高单细胞RNA测序CRISPR屏幕中的gRNA细胞分配的准确性.
- 准确的环境gRNA过对于可靠的下游分析至关重要,例如差异基因表达.
- 开发的方法提高了大规模基因组扰乱研究的可靠性和可解释性.
相关概念视频
01:59CRISPR
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...
02:53CRISPR and crRNAs
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
01:59CRISPR
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...
01:28CRISPR/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...