Structure-guided chemical modification of guide RNA enables potent non-viral in vivo genome editing

Efficient Cas9 genome editing in vivo is achieved without viral vectors using chemically modified single-guide RNAs. Efficient genome editing with Cas9–sgRNA in vivo has required the use of viral delivery systems, which have limitations for clinical applications. Translational efforts to develop other RNA therapeutics have shown that judicious chemical modification of RNAs can improve therapeutic efficacy by reducing susceptibility to nuclease...