Abstract:
:Deficiency of the dysferlin protein presents as two major clinical phenotypes: limb-girdle muscular dystrophy type 2B and Miyoshi myopathy. Dysferlin is known to participate in membrane repair, providing a potential hypothesis to the underlying pathophysiology of these diseases. The size of the dysferlin cDNA prevents its direct incorporation into an adeno-associated virus (AAV) vector for therapeutic gene transfer into muscle. To bypass this limitation, we split the dysferlin cDNA at the exon 28/29 junction and cloned it into two independent AAV vectors carrying the appropriate splicing sequences. Intramuscular injection of the corresponding vectors into a dysferlin-deficient mouse model led to the expression of full-length dysferlin for at least 1 year. Importantly, systemic injection in the tail vein of the two vectors led to a widespread although weak expression of the full-length protein. Injections were associated with an improvement of the histological aspect of the muscle, a reduction in the number of necrotic fibers, restoration of membrane repair capacity and a global improvement in locomotor activity. Altogether, these data support the use of such a strategy for the treatment of dysferlin deficiency.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Lostal W,Bartoli M,Bourg N,Roudaut C,Bentaïb A,Miyake K,Guerchet N,Fougerousse F,McNeil P,Richard Idoi
10.1093/hmg/ddq065subject
Has Abstractpub_date
2010-05-15 00:00:00pages
1897-907issue
10eissn
0964-6906issn
1460-2083pii
ddq065journal_volume
19pub_type
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