通过Cas9进行RNA引导的人类基因组工程
Prashant Mali1, Luhan Yang, Kevin M Esvelt
1Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
概括
科学家们为人类基因组编辑设计了细菌聚类定期间隔的短平行体重复 (CRISPR) 系统. 这种新型的RNA导向工具能够在人类细胞中精确和多重编辑基因.
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:
- 细菌和古生物拥有称为CRISPR/Cas的自适应性免疫系统,它们利用RNA向和降解外来核酸.
- 这些系统为真核细胞中针对性基因组操纵提供了潜在的框架.
研究的目的:
- 设计II型细菌CRISPR系统,用于在人体细胞中使用定制导向RNA (gRNA) 进行基因组编辑应用.
- 评估这种工程CRISPR系统的效率和特异性,以准各种人体细胞类型的内源基位.
主要方法:
- 适应II型CRISPR系统与人体细胞系 (293T,K562) 和诱导多能干细胞中的合成gRNA一起工作.
- 在内源性AAVS1位点对准效率的评估.
- 通过同时引入多个gRNA来证明序列特异性和多重编辑能力.
- 计算分析以生成针对人类前子的潜在gRNA的全基因组资源.
主要成果:
- 在293T细胞中达到10-25%的向率,在K562细胞中达到8-13%,在AAVS1位点诱导的多能干细胞中达到2-4%.
- 确认编辑过程依赖于CRISPR组件,并且是特定于序列的.
- 通过同时使用多个gRNAs成功证明了目标位点的多重编辑.
- 开发了大约19万个独特的gRNA的综合资源,目标是超过40%的人类外型.
结论:
- 工程CRISPR系统为人类基因组工程提供了一个简单,强大和可复合的工具.
- 这种RNA引导的编辑技术在推进人类遗传学研究和治疗开发方面具有重大潜力.
相关概念视频
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