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相关概念视频

Genetic Screens02:46

Genetic Screens

5.5K
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...
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CRISPR/Cas9 Genome Editing01:28

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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...
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相关实验视频

Updated: Jan 7, 2026

Pooled CRISPR-Based Genetic Screens in Mammalian Cells
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一个下一代双向导CRISPR系统用于基因相互作用库选.

Thomas Burgold1, Emre Karakoc1,2, Emanuel Gonçalves1,3,4

  • 1Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK.

Nature communications
|December 6, 2025
PubMed
概括

我们开发了一种新的CRISPR/Cas9系统,用于有效选基因相互作用. 这种方法简化了克隆,并改善了双导向RNA的表达,使得癌症治疗开发的大规模基因相互作用研究成为可能.

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相关实验视频

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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:

  • 在基因相互作用查中,CRISPR/Cas9使基因功能干扰成为可能.
  • 现有的双导向RNA系统在克隆,导向对纯度和表达平衡方面面临挑战.

研究的目的:

  • 为大规模的CRISPR/Cas9遗传查开发一个改进的双导向RNA传递系统.
  • 为了克服当前双向导表达系统的局限性.

主要方法:

  • 一种新的双导向RNA输送系统,利用tRNA间隔器进行单步克隆.
  • 用Streptococcus pyogenes Cas9 (SpCas9) 进行图书馆规模查的实施.
  • 在结直肠癌细胞中对100,136个指导对图书馆进行查.

主要成果:

  • 新系统允许采用单步克隆策略,使用最少的不需要的引导对 (低至2%).
  • 实现了两种交付导向RNA的高度平衡的表达.
  • 在结直肠癌细胞中成功确定了合成致命的遗传相互作用.

结论:

  • 这一下一代系统可促进高效,大规模的基因相互作用查.
  • 这种多功能系统可以适应各种CRISPR应用,包括组合疗法识别.
  • 展示了一种强大的方法来发现与癌症研究相关的基因相互作用.