Efficient mouse genome engineering by CRISPR-EZ technology.

Efficient mouse genome engineering by CRISPR-EZ technology.
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DOI:
10.1038/nprot.2018.012
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发表时间:
2018-06
期刊:
影响因子:
14.8
通讯作者:
He L
He L
中科院分区:
生物学1区
文献类型:
--
作者:
Modzelewski AJ;Chen S;Willis BJ;Lloyd KCK;Wood JA;He L

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CRISPR/Cas9技术以前所未有的精度、效率和易用性改变了小鼠基因组编辑;然而,目前将CRISPR试剂微注射到原核阶段胚胎的做法仍然是有限的。因此,我们开发了CRISPR - ez (CRISPR RNP受精卵电穿孔),这是一种基于电穿孔的技术,在效率、简单性、成本和吞吐量方面优于原核和细胞质微注射。在C57BL/6J和C57BL/6N小鼠品系中,CRISPR-EZ实现了Cas9/sgRNA核糖核蛋白(RNPs)的100%递送,促进了indel突变(插入或缺失)、外显子缺失、点突变和小插入。在高通量敲除小鼠项目(KOMP)管道中的并排比较中,CRISPR-EZ的表现始终优于微注射。在这里,我们提供了一个优化的方案,包括单导RNA (sgRNA)合成,胚胎收集,RNP电穿孔,小鼠生成和基因分型策略。使用CRISPR-EZ,具有基本胚胎操作技能的研究生水平的研究人员可以在6周内获得转基因小鼠。总之,CRISPR-EZ是一种简单、经济、高效和高通量的技术,可能适用于其他哺乳动物物种。
CRISPR/Cas9 technology has transformed mouse genome editing with unprecedented precision, efficiency, and ease; however, the current practice of microinjecting CRISPR reagents into pronuclear-stage embryos remains rate-limiting. We thus developed CRISRP-EZ (CRISPR RNP Electroporation of Zygotes), an electroporation-based technology that outperforms pronuclear and cytoplasmic microinjection in efficiency, simplicity, cost, and throughput. In C57BL/6J and C57BL/6N mouse strains, CRISPR-EZ achieves 100% delivery of Cas9/sgRNA ribonucleoproteins (RNPs), facilitating indel mutations (insertions or deletions), exon deletions, point mutations, and small insertions. In a side-by-side comparison in the high-throughput KnockOut Mouse Project (KOMP) pipeline, CRISPR-EZ consistently outperformed microinjection. Here, we provide an optimized protocol covering single guide RNA (sgRNA) synthesis, embryo collection, RNP electroporation, mouse generation, and genotyping strategies. Using CRISPR-EZ, a graduate-level researcher with basic embryo manipulation skills can obtain genetically modified mice in 6 weeks. Altogether, CRISPR-EZ is a simple, economic, efficient, and high-throughput technology that is potentially applicable to other mammalian species.
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