Human cleaving embryos enable robust homozygotic nucleotide substitutions by base editors

Meiling Zhang, Changyang Zhou, Yu Wei, Chunlong Xu, Hong Pan, Wenqin Ying, Yidi Sun, Yun Sun, Qingquan Xiao, Ning Yao, Wanxia Zhong, Yun Li, Keliang Wu, Gao Yuan, Shoukhrat Mitalipov, Zi Jiang Chen, Hui Yang

    Research output: Contribution to journalArticlepeer-review

    14 Scopus citations


    Base editing installs a precise nucleotide change in specific gene loci without causing a double-strand break. Its efficiency in human embryos is generally low, limiting its utility in functional genetic studies. Here, we report that injecting base editors into human cleaving two-cell and four-cell embryos results in much higher (up to 13-fold) homozygotic nucleotide substitution efficiency as opposed to MII oocytes or zygotes. Furthermore, as a proof-of-principle study, a point mutation can be efficiently corrected by our method. Our study indicates that human cleaving embryos provide an efficient base editing window for robust gene disruption and correction.

    Original languageEnglish (US)
    Article number101
    JournalGenome biology
    Issue number1
    StatePublished - May 22 2019


    • Base editing
    • Homozygotic nucleotide substitution
    • Human cleaving embryos

    ASJC Scopus subject areas

    • Ecology, Evolution, Behavior and Systematics
    • Genetics
    • Cell Biology


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