Efficient recovery of dysferlin deficiency by dual adeno-associated vector-mediated gene transfer.

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 Genet

journal_title

Human molecular genetics

authors

Lostal W,Bartoli M,Bourg N,Roudaut C,Bentaïb A,Miyake K,Guerchet N,Fougerousse F,McNeil P,Richard I

doi

10.1093/hmg/ddq065

subject

Has Abstract

pub_date

2010-05-15 00:00:00

pages

1897-907

issue

10

eissn

0964-6906

issn

1460-2083

pii

ddq065

journal_volume

19

pub_type

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