Dystrophin isoform induction in vivo by antisense-mediated alternative splicing.

TitleDystrophin isoform induction in vivo by antisense-mediated alternative splicing.
Publication TypeJournal Article
Year of Publication2010
AuthorsFletcher S, Adams AM, Johnsen RD, Greer K, Moulton HM, Wilton SD
JournalMolecular therapy : the journal of the American Society of Gene Therapy
Volume18
Issue6
Pagination1218-23
Date Published2010 Jun
ISSN1525-0024
KeywordsAlternative Splicing, Animals, Dystrophin, Mice, Oligonucleotides, Antisense, Protein Isoforms
Abstract

Antisense oligomer-induced manipulation of dystrophin pre-mRNA processing can remove exons carrying mutations, or exclude exons flanking frameshifting mutations, and restore dystrophin expression in dystrophinopathy models and in Duchenne muscular dystrophy (DMD) patients. Splice intervention can also be used to manipulate the normal dystrophin pre-mRNA processing and ablate dystrophin expression in wild-type mice, with signs of pathology being induced in selected muscles within 4 weeks of commencing treatment. The disruption of normal dystrophin pre-mRNA processing to alter the reading frame can be very efficient and offers an alternative mechanism to RNA silencing for gene suppression. In addition, it is possible to remove in-frame exon blocks from the DMD gene transcript and induce specific dystrophin isoforms that retain partial functionality, without having to generate transgenic animal models. Specific exon removal to yield in-frame dystrophin transcripts will facilitate mapping of functional protein domains, based upon exon boundaries, and will be particularly relevant where there is either limited, or conflicting information as to the consequences of in-frame dystrophin exon deletions on the clinical severity and progression of the dystrophinopathy.

DOI10.1038/mt.2010.45
Alternate JournalMol. Ther.