Ex vivo gene transfer using adenovirus-mediated full-length dystrophin delivery to dystrophic muscles

Gene Therapy
S S FloydJ Huard

Abstract

Duchenne muscular dystrophy (DMD) is an X-linked recessive muscle disease characterized by a lack of dystrophin expression. Myoblast transplantation and gene therapy have the potential of restoring dystrophin, thus decreasing the muscle weakness associated with this disease. In this study we present data on the myoblast mediated ex vivo gene transfer of full-length dystrophin to mdx (dystrophin deficient) mouse muscle as a model for autologous myoblast transfer. Both isogenic primary mdx myoblasts and an immortalized mdx cell line were transduced with an adenoviral vector that has all viral coding sequences deleted and encodes beta-galactosidase and full-length dystrophin. Subsequently, these transduced myoblasts were injected into dystrophic mdx muscle, where the injected cells restored dystrophin, as well as dystrophin-associated proteins. A greater amount of dystrophin replacement occurred in mdx muscle following transplantation of mdx myoblasts isolated from a transgenic mouse overexpressing dystrophin suggesting that engineering autologous myoblasts to express high amounts of dystrophin might be beneficial. The ex vivo approach possesses attributes that make it useful for gene transfer to skeletal muscle including: (1) cre...Continue Reading

Citations

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