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Gene delivery to skeletal muscle results in sustained expression and systemic delivery of a therapeutic protein

By Paul D. Kessler, Gregory M. Podsakoff, Xiaojuan Chen, Susan A. McQuiston, Peter C. Colosi, Laura A. Matelis, Gary J. Kurtzman and Barry J. Byrne

Abstract

Somatic gene therapy has been proposed as a means to achieve systemic delivery of therapeutic proteins. However, there is limited evidence that current methods of gene delivery can practically achieve this goal. In this study, we demonstrate that, following a single intramuscular administration of a recombinant adeno-associated virus (rAAV) vector containing the β-galactosidase (AAV-lacZ) gene into adult BALB/c mice, protein expression was detected in myofibers for at least 32 weeks. A single intramuscular administration of an AAV vector containing a gene for human erythropoietin (AAV-Epo) into mice resulted in dose-dependent secretion of erythropoietin and corresponding increases in red blood cell production that persisted for up to 40 weeks. Primary human myotubes transduced in vitro with the AAV-Epo vector also showed dose-dependent production of Epo. These results demonstrate that rAAV vectors are able to transduce skeletal muscle and are capable of achieving sustained expression and systemic delivery of a therapeutic protein following a single intramuscular administration. Gene therapy using AAV vectors may provide a practical strategy for the treatment of inherited and acquired protein deficiencies

Topics: Biological Sciences
Publisher: The National Academy of Sciences of the USA
Year: 1996
OAI identifier: oai:pubmedcentral.nih.gov:19498
Provided by: PubMed Central
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