Intravenous Injection of an AAV-PHP.B Vector Encoding Human Acid α-Glucosidase Rescues Both Muscle and CNS Defects in Murine Pompe Disease.

Published online

Journal Article

Pompe disease, a severe and often fatal neuromuscular disorder, is caused by a deficiency of the lysosomal enzyme acid alpha-glucosidase (GAA). The disease is characterized by the accumulation of excess glycogen in the heart, skeletal muscle, and CNS. Currently approved enzyme replacement therapy or experimental adeno-associated virus (AAV)-mediated gene therapy has little effect on CNS correction. Here we demonstrate that a newly developed AAV-PHP.B vector can robustly transduce both the CNS and skeletal muscles in GAA-knockout (GAAKO) mice. A single intravenous injection of an AAV-PHP.B vector expressing human GAA under the control of cytomegalovirus (CMV) enhancer-chicken β-actin (CB) promoter into 2-week-old GAAKO mice resulted in widespread GAA expression in the affected tissues. Glycogen contents were reduced to wild-type levels in the brain and heart, and they were significantly decreased in skeletal muscle by the AAV treatment. The histological assay showed no visible glycogen in any region of the brain and spinal cord of AAV-treated mice. In this study, we describe a set of behavioral tests that can detect early neurological deficits linked to extensive lysosomal glycogen accumulation in the CNS of untreated GAAKO mice. Furthermore, we demonstrate that the therapy can help prevent the development of these abnormalities.

Full Text

Duke Authors

Cited Authors

  • Lim, J-A; Yi, H; Gao, F; Raben, N; Kishnani, PS; Sun, B

Published Date

  • March 15, 2019

Published In

Volume / Issue

  • 12 /

Start / End Page

  • 233 - 245

PubMed ID

  • 30809555

Pubmed Central ID

  • 30809555

International Standard Serial Number (ISSN)

  • 2329-0501

Digital Object Identifier (DOI)

  • 10.1016/j.omtm.2019.01.006

Language

  • eng

Conference Location

  • United States