Document Type
Journal Article
Date of this Version
10-1-2002
Publication Source
Proceedings of the National Academy of Sciences
Volume
99
Issue
20
Start Page
13102
Last Page
13107
DOI
10.1073/pnas.192353499
Abstract
Dogs with mucopolysaccharidosis VII (MPS VII) were injected intravenously at 2–3 days of age with a retroviral vector (RV) expressing canine β-glucuronidase (cGUSB). Five animals received RV alone, and two dogs received hepatocyte growth factor (HGF) before RV in an attempt to increase transduction efficiency. Transduced hepatocytes expanded clonally during normal liver growth and secreted enzyme with mannose 6-phosphate. Serum GUSB activity was stable for up to 14 months at normal levels for the RV-treated dogs, and for 17 months at 67-fold normal for the HGF/RV-treated dog. GUSB activity in other organs was 1.5–60% of normal at 6 months for two RV-treated dogs, which was likely because of uptake of enzyme from blood by the mannose 6-phosphate receptor. The body weights of untreated MPS VII dogs are 50% of normal at 6 months. MPS VII dogs cannot walk or stand after 6 months, and progressively develop eye and heart disease. RV- and HGF/RV-treated MPS VII dogs achieved 87% and 84% of normal body weight, respectively. Treated animals could run at all times of evaluation for 6–17 months because of improvements in bone and joint abnormalities, and had little or no corneal clouding and no mitral valve thickening. Despite higher GUSB expression, the clinical improvements in the HGF/RV-treated dog were similar to those in the RV-treated animals. This is the first successful application of gene therapy in preventing the clinical manifestations of a lysosomal storage disease in a large animal.
Recommended Citation
Parker Ponder, K., Melniczek, J. R., Xu, L., Weil, M. A., O'Malley, T. M., O'Donnell, P. A., Knox, V. W., Aguirre, G. D., Mazrier, H., Ellinwood, N. M., Sleeper, M. M., Maguire, A. M., Volk, S. W., Mango, R. L., Zweigle, J., Wolfe, J. H., & Haskins, M. E. (2002). Therapeutic Neonatal Hepatic Gene Therapy in Mucopolysaccharidosis VII Dogs. Proceedings of the National Academy of Sciences, 99 (20), 13102-13107. http://dx.doi.org/10.1073/pnas.192353499
Included in
Comparative and Laboratory Animal Medicine Commons, Large or Food Animal and Equine Medicine Commons
Date Posted: 25 July 2013
This document has been peer reviewed.
Comments
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