Abstract:
:Splice modulation therapy has shown great clinical promise in Duchenne muscular dystrophy, resulting in the production of dystrophin protein. Despite this, the relationship between restoring dystrophin to established dystrophic muscle and its ability to induce clinically relevant changes in muscle function is poorly understood. In order to robustly evaluate functional improvement, we used in situ protocols in the mdx mouse to measure muscle strength and resistance to eccentric contraction-induced damage. Here, we modelled the treatment of muscle with pre-existing dystrophic pathology using antisense oligonucleotides conjugated to a cell-penetrating peptide. We reveal that 15% homogeneous dystrophin expression is sufficient to protect against eccentric contraction-induced injury. In addition, we demonstrate a >40% increase in specific isometric force following repeated administrations. Strikingly, we show that changes in muscle strength are proportional to dystrophin expression levels. These data define the dystrophin restoration levels required to slow down or prevent disease progression and improve overall muscle function once a dystrophic environment has been established in the mdx mouse model.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Godfrey C,Muses S,McClorey G,Wells KE,Coursindel T,Terry RL,Betts C,Hammond S,O'Donovan L,Hildyard J,El Andaloussi S,Gait MJ,Wood MJ,Wells DJdoi
10.1093/hmg/ddv155subject
Has Abstractpub_date
2015-08-01 00:00:00pages
4225-37issue
15eissn
0964-6906issn
1460-2083pii
ddv155journal_volume
24pub_type
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