Development of DG9 peptide-conjugated single- and multi-exon skipping therapies for the treatment of Duchenne muscular dystrophy

Author:

Lim Kenji Rowel Q.1ORCID,Woo Stanley1ORCID,Melo Dyanna1,Huang Yiqing1ORCID,Dzierlega Kasia1,Shah Md Nur Ahad1ORCID,Aslesh Tejal1,Roshmi Rohini Roy1,Echigoya Yusuke2ORCID,Maruyama Rika1ORCID,Moulton Hong M.3,Yokota Toshifumi14

Affiliation:

1. Department of Medical Genetics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB T6G2H7, Canada

2. Laboratory of Biomedical Science, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa 252-0880, Japan

3. Department of Biomedical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331

4. The Friends of Garrett Cumming Research and Muscular Dystrophy Canada Endowed Research Chair, University of Alberta Faculty of Medicine and Dentistry, Edmonton, AB T6G2H7, Canada

Abstract

Significance Duchenne muscular dystrophy (DMD) is a fatal disorder of progressive body-wide muscle weakness, considered the most common muscular dystrophy worldwide. Most patients have out-of-frame deletions in the DMD gene, leading to dystrophin absence in muscle. There is no cure for DMD, but exon skipping is emerging as a potential therapy that uses antisense oligonucleotides to convert out-of-frame to in-frame mutations, enabling the production of truncated, partially functional dystrophin. Currently approved exon skipping therapies, however, have limited applicability and efficacy. Here, we developed a more economical approach to skip DMD exons 45 to 55 (a strategy that could treat nearly half of all DMD patients) and identified DG9 peptide conjugation as a powerful way to improve exon skipping efficiencies in vivo.

Funder

Gouvernement du Canada | Canadian Institutes of Health Research

Jesse''''s Journey

Heart and Stroke Foundation of Canada

Women and Children''''s Health Research Institute

he Friends of Garrett Cumming Research & Muscular Dystrophy Canada HM Toupin Neurological Science Research Chair Fund

Alberta Innovates Graduate Studentship

Publisher

Proceedings of the National Academy of Sciences

Subject

Multidisciplinary

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