Exon skipping therapies based on antisense phosphorodiamidate morpholino oligomer (PMO) have great potential to restore dystrophin in the skeletal muscle and treat Duchenne muscular dystrophy (DMD). Entrada Therapeutics Inc. has developed an endosomal escape vehicle conjugated to DMD exon skipping PMOs (exon 51 skipping), ENTR-601-51, for the potential treatment of DMD.