Fully deleted adenovirus persistently expressing GAA accomplishes long-term skeletal muscle glycogen correction in tolerant and nontolerant GSD-II mice.

Journal Article

Glycogen storage disease type II (GSD-II) patients manifest symptoms of muscular dystrophy secondary to abnormal glycogen storage in cardiac and skeletal muscles. For GSD-II, we hypothesized that a fully deleted adenovirus (FDAd) vector expressing hGAA via nonviral regulatory elements (PEPCK promoter/ApoE enhancer) would facilitate long-term efficacy and decrease propensity to generate anti-hGAA antibody responses against hepatically secreted hGAA. Intravenous delivery of FDAdhGAA into GAA-tolerant or nontolerant GAA-KO mice resulted in long-term hepatic secretion of hGAA. Specifically, nontolerant mice achieved complete reversal of cardiac glycogen storage and near-complete skeletal glycogen correction for at least 180 days and tolerant mice for minimally 300 days coupled with the preservation of muscle strength. Anti-hGAA antibody levels in both mouse strains were significantly less relative to those previously generated by CMV-driven hGAA expression in nontolerant GAA-KO mice. However, plasma GAA levels decreased in nontolerant GAA-KO mice despite long-term intrahepatic GAA expression from the persistent vector. This intriguing result is discussed in light of other examples of "tolerance" induction by gene-transfer-based approaches.

Full Text

Duke Authors

Cited Authors

  • Kiang, A; Hartman, ZC; Liao, S; Xu, F; Serra, D; Palmer, DJ; Ng, P; Amalfitano, A

Published Date

  • January 2006

Published In

Volume / Issue

  • 13 / 1

Start / End Page

  • 127 - 134

PubMed ID

  • 16169280

International Standard Serial Number (ISSN)

  • 1525-0016

Digital Object Identifier (DOI)

  • 10.1016/j.ymthe.2005.08.006

Language

  • eng

Conference Location

  • United States