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  • As described recently in Nature Communications, Michigan Medicine researchers have developed a new variant of the much-touted tool CRISPR-Cas9, which improves both safety and effectiveness when editing DNA.

    Today, safety and efficacy continue to hold CRISPR-Cas9 gene targeting back from its full clinical potential.

    The new CRISPR-Cas9 variant improves efficiency when inserting a gene or DNA fragment to a precise location in the genome, known as ¡°knocking in.¡±  It also reduces the rate of unintended insertions or deletions of base pairs, known as ¡°indels,¡± that often happen while gene editing.

    The new variant is called ¡°meticulous integration Cas9,¡± or miCas9, to reflect its extraordinary capacity to enable maximum integration and create minimal indels.

    The team previously reported discoveries about Cas9 genome editing techniques in 2014 and they reported beneficial effects of a RAD51 agonist, called RS-1, in gene editing in 2016.

    References
    Nature Communications, November 2020, ¡°MiCas9 Increases Large Size Gene Knock-in Rates and Reduces Undesirable On-target and Off-target Indel Edits,¡± by Linyuan Ma, et al.  © 2020 Springer Nature Limited.  All rights reserved.

    To view or purchase this article, please visit:
    https://www.nature.com/articles/s41467-020-19842-2
    MiCas9 increases large size gene knock-in rates and reduces undesirable on-target and off-target indel edits chr(124)_pipe Nature Communications