Exon-Skipping Oligonucleotides Restore Functional Collagen VI by Correcting a Common COL6A1 Mutation in Ullrich CMD.
Collagen VI
Ullrich muscular dystrophy
antisense oligonucleotide
congenital muscular dystrophy
deep intronic mutation
exon skipping
extra cellular matrix
Journal
Molecular therapy. Nucleic acids
ISSN: 2162-2531
Titre abrégé: Mol Ther Nucleic Acids
Pays: United States
ID NLM: 101581621
Informations de publication
Date de publication:
04 Sep 2020
04 Sep 2020
Historique:
received:
07
04
2020
revised:
12
05
2020
accepted:
26
05
2020
pubmed:
26
6
2020
medline:
26
6
2020
entrez:
26
6
2020
Statut:
ppublish
Résumé
Collagen VI-related congenital muscular dystrophies (COL6-CMDs) are the second most common form of congenital muscular dystrophy. Currently, there is no effective treatment available. COL6-CMDs are caused by recessive or dominant mutations in one of the three genes encoding for the α chains of collagen type VI (COL6A1, COL6A2, and COL6A3). One of the most common mutations in COL6-CMD patients is a de novo deep intronic c.930+189C > T mutation in COL6A1 gene. This mutation creates a cryptic donor splice site and induces incorporation of a novel in-frame pseudo-exon in the mature transcripts. In this study, we systematically evaluated the splice switching approach using antisense oligonucleotides (ASOs) to correct this mutation. Fifteen ASOs were designed using the RNA-tiling approach to target the misspliced pseudo-exon and its flanking sequences. The efficiency of ASOs was evaluated at RNA, protein, and structural levels in skin fibroblasts established from four patients carrying the c.930+189C > T mutation. We identified two additional lead ASO candidates that efficiently induce pseudo-exon exclusion from the mature transcripts, thus allowing for the restoration of a functional collagen VI microfibrillar matrix. Our findings provide further evidence for ASO exon skipping as a therapeutic approach for COL6-CMD patients carrying this common intronic mutation.
Identifiants
pubmed: 32585628
pii: S2162-2531(20)30155-4
doi: 10.1016/j.omtn.2020.05.029
pmc: PMC7321786
pii:
doi:
Types de publication
Journal Article
Langues
eng
Pagination
205-216Subventions
Organisme : Wellcome Trust
Pays : United Kingdom
Informations de copyright
Copyright © 2020 The Author(s). Published by Elsevier Inc. All rights reserved.
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