Abstract: The present disclosure provides a method of modifying a mutant dystrophin gene in the genome of a cell. The present disclosure further provides compositions and kits for modifying a mutant dystrophin gene in the genome of a cell.

Abstract: In various embodiments a polyrotaxane carrier for in vivo delivery of a nucleic acid is provided. In certain embodiments the carrier comprises: a multi-arm polyethylene glycol (PEG) backbone comprising at least three arms; at least one cyclic compound having a cavity, where an arm of said multi-arm PEG backbone is threaded into the cavity of said cyclic compound forming an inclusion complex; a bulky moiety capping the terminal of the arm(s) threaded into said cyclic compound where said moiety inhibits dethreading of the cyclodextrin from the arm(s) of said backbone; and where at least one arm of said PEG backbone is free of cyclic compounds; and where said carrier has a net positive charge.

Abstract: The present disclosure provides a method of modifying a mutant dystrophin gene in the genome of a cell. The present disclosure further provides compositions and kits for modifying a mutant dystrophin gene in the genome of a cell.

Abstract: Disclosed herein are guide sequences for modifying a dystrophin gene using CRISPR technology. Specifically, the disclosure provides a method of modifying a dystrophin gene in a cell or a subject, which comprises introducing into the cell or subject (a) a Cas protein or a nucleotide sequence encoding the Cas protein; and a single guide RNA (gRNA), or a first gRNA and a second gRNA, wherein the Cas protein is a type II CRISPR/Cas endonuclease. Further disclosed are gRNA nucleic acid sequences.

Abstract: In various embodiments a polyrotaxane carrier for in vivo delivery of a nucleic acid is provided. In certain embodiments the carrier comprises: a multi-arm polyethylene glycol (PEG) backbone comprising at least three arms; at least one cyclic compound having a cavity, where an arm of said multi-arm PEG backbone is threaded into the cavity of said cyclic compound forming an inclusion complex; a bulky moiety capping the terminal of the arm(s) threaded into said cyclic compound where said moiety inhibits dethreading of the cyclodextrin from the arm(s) of said backbone; and where at least one arm of said PEG backbone is free of cyclic compounds; and where said carrier has a net positive charge.

Abstract: The present disclosure provides a method of modifying a mutant dystrophin gene in the genome of a cell. The present disclosure further provides compositions and kits for modifying a mutant dystrophin gene in the genome of a cell.