Easi-CRISPR for creating knock-in and conditional knockout mouse models using long ssDNA donors.
Easi-CRISPR for creating knock-in and conditional knockout mouse models using long ssDNA donors.
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DOI:
10.1038/nprot.2017.153
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发表时间:
2018-01
期刊:
影响因子:
14.8
通讯作者:
Ohtsuka M
中科院分区:
文献类型:
--
作者:
Miura H;Quadros RM;Gurumurthy CB;Ohtsuka M
CRISPR/Cas9-based genome editing can easily generate knockout mouse models by disrupting the gene sequence, but its efficiency for creating models that require either insertion of exogenous DNA (knock-in) or replacement of genomic segments is very poor. The majority of mouse models used in research are knock-in (reporters or recombinases) or gene-replacement (for example, conditional knockout alleles containing LoxP sites flanked exons). A few methods for creating such models have been reported using double-stranded DNA as donors, but their efficiency is typically 1–10% and therefore not suitable for routine use. We recently demonstrated that long single-stranded DNAs serve as very efficient donors, both for insertion and for gene replacement. We call this method Easi-CRISPR (Efficient additions with ssDNA inserts-CRISPR), a highly efficient technology (typically 30%−60%, and up to 100% in some cases). The protocol takes approximately two months to generate the founder mice.
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