Abstract:
:Gene-targeted animal models that are generated by injecting Cas9 and sgRNAs into zygotes are often accompanied by undesired double-strand break (DSB)-induced byproducts and random biallelic targeting due to uncontrollable Cas9 targeting activity. Here, we establish a parental allele-specific gene-targeting (Past-CRISPR) method, based on the detailed observation that pronuclear transfer-mediated cytoplasmic dilution can effectively terminate Cas9 activity. We apply this method in embryos to efficiently target the given parental alleles of a gene of interest and observed little genomic mosaicism because of the spatiotemporal control of Cas9 activity. This method allows us to rapidly explore the function of individual parent-of-origin effects and to construct animal models with a single genomic change. More importantly, Past-CRISPR could also be used for therapeutic applications or disease model construction.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Li Y,Weng Y,Bai D,Jia Y,Liu Y,Zhang Y,Kou X,Zhao Y,Ruan J,Chen J,Yin J,Wang H,Teng X,Wang Z,Liu W,Gao Sdoi
10.1038/s41467-020-18391-ysubject
Has Abstractpub_date
2020-09-14 00:00:00pages
4593issue
1issn
2041-1723pii
10.1038/s41467-020-18391-yjournal_volume
11pub_type
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