Provided herein are peptide-linked morpholino (PPMO) antisense oligonucleotides that target the poly CUG repeat tract in the 3' untranslated region of the gene encoding dystrophia myotonica-protein kinase (DMPK) and methods for systemic administration of the same for the treatment of mytonic dystrophy type I (DM1).本文提供經胜肽連結之嗎啉基(PPMO)反義寡核苷酸,其靶定編碼營養不良性肌強直症-蛋白激酶(DMPK)之基因的3’未轉譯區中的聚CUG重複序列束;以及用於全身性投與經胜肽連結之嗎啉基反義寡核苷酸以供治療第I型強直性肌失養症(DM1)的方法。