相关实验视频

Updated: May 5, 2026

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays

Published on: November 12, 2012

评估Cas13d作为基因相互作用映射的工具

Ghanem El Kassem¹, Jasmine Hillmer¹, Michael Boettcher²

¹Universitätsmedizin Halle, Martin Luther University Halle-Wittenberg, Halle (Saale), 06120, Halle, Germany.

Nature communications

|February 14, 2025

概括

与DNA向Cas9和Cas12a相比,Cas13dRNA向为基因相互作用 (GI) 绘制提供了更快的基因扰动. 这种CRISPR工具增强了瘤性途径的胃肠道分析,改善了对药物反应的理解.

科学领域:

分子生物学分子生物学
遗传学是一个遗传学.
生物技术是生物技术.

背景情况:

遗传相互作用 (GI) 是理解复杂遗传网络的关键.
像Cas9和Cas12a这样的CRISPR-Cas系统是GI绘图的成熟工具.
向RNA的CRISPR系统为遗传扰乱提供了替代方法.

研究的目的:

评估Cas13d的有效性,一个向RNA的CRISPR系统,用于基因相互作用映射.
将Cas13d的性能与向DNA的Cas9和Cas12a系统进行比较.
开发和优化用于增强Cas13d介导的基因扰乱的策略.

主要方法:

利用Cas13d,Cas9和Cas12a系统进行遗传相互作用映射.
开发了一种双促进器gRNA表达策略,以克服gRNA-gRNA与Cas13d的干扰.
采用连接导向RNA (gRNA),准单个或多个基因.
量化增殖表型,以评估瘤信号通路中的遗传相互作用.

主要成果:

与Cas9或Cas12a相比,Cas13d表现出更快的目标基因扰动和更均的细胞群,用于双重扰动.
一个双促进子策略成功地减轻了Cas13d gRNA-gRNA干扰.
将三个针对同一基因的gRNA连接在一起,最大限度地实现了Cas13d介导的淘汰.
优化的Cas13d策略增强了繁殖表型,并使可重复的GI量化成为可能.

结论:

Cas13d是基因相互作用映射的强大工具,与传统的DNA向CRISPR系统相比,它具有优势.
优化的Cas13d策略促进了高效和可重复的GI分析,特别是在复杂的途径中.
这项工作推动了RNA向CRISPR的应用,以了解遗传网络和药物反应途径.

更多相关视频

In Vivo Modeling of the Morbid Human Genome using Danio rerio

In Vivo Modeling of the Morbid Human Genome using Danio rerio

Published on: August 24, 2013

Using Caenorhabditis elegans to Screen for Tissue-Specific Chaperone Interactions

Using Caenorhabditis elegans to Screen for Tissue-Specific Chaperone Interactions

Published on: June 7, 2020

相关概念视频

Genetic Screens

Genetic Screens

Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which...

Epistasis Analysis

Epistasis Analysis

Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...