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Gonçalves, M.A. et al.

Gonçalves, Holkers, Cudré-Mauroux, van Nierop, Knaän-Shanzer, van der Velde, Valerio, de Vries,

Transduction of myogenic cells by retargeted dual high-capacity hybrid viral vectors: robust dystrophin synthesis in duchenne muscular dystrophy muscle cells.

Duchenne muscular dystrophy (DMD) is caused by mutations in the dystrophin gene (DMD), making it amenable to gene- or cell-based therapies. Another possible treatment entails the combination of both principles by transplantation of autologous myogenic cells after their genetic complementation. This approach requires efficient and stable transduction of these cells with recombinant DMD. Recently, we generated a dual high-capacity (hc) adenovirus (Ad)-adeno-associated virus (AAV) hybrid vector (HV) that can deliver two full-length dystrophin-encoding modules into target cells. We showed that HV transduction of human cells containing AAV Rep proteins leads to the insertion of foreign DNA into the AAVS1 locus. Here, we improved HV entry into muscle cells from DMD patients. After having verified that these cells barely express the coxsackie B virus and Ad receptor (CAR), which constitutes the attachment molecule for Ad serotype 5 (Ad5) fibers, we equipped dual hcAd/AAV HV particles with Ad serotype 50 fiber domains to achieve CAR-independent uptake. These retargeted vectors complemented much more efficiently the genetic defect of dystrophin-defective myoblasts and myotubes than their isogenic counterparts with conventional Ad5 fibers. Importantly, the accumulation of beta-dystroglycan along the membranes of vector-treated DMD myotubes indicated proper assembly of dystrophin-associated glycoprotein complexes.[1]

References

Transduction of myogenic cells by retargeted dual high-capacity hybrid viral vectors: robust dystrophin synthesis in duchenne muscular dystrophy muscle cells. Gonçalves, M.A., Holkers, M., Cudré-Mauroux, C., van Nierop, G.P., Knaän-Shanzer, S., van der Velde, I., Valerio, D., de Vries, A.A. Mol. Ther. (2006) [Pubmed]

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