Delpacibart (del-zota, AOC 1044) is a selective exon skipping inducer targeting the exon 44 mutation site of the dystrophin gene, and is an antibody-oligonucleotide conjugate (AOC). Delpacibart induces exon 44 skipping of the dystrophin gene, restoring the gene reading frame and producing a shortened but functional dystrophin protein, thereby improving muscle fiber integrity. Delpacibart can significantly and persistently reduce serum levels of creatine kinase, alanine aminotransferase, aspartate aminotransferase, and myoglobin to near-normal levels, improving muscle damage markers, and has a good safety profile. Delpacibart is used in the study of Duchenne muscular dystrophy (DMD44) suitable for exon 44 skipping mutations.