title: Long-term correction of murine glycogen storage disease type Ia by recombinant adeno-associated virus-1-mediated gene transfer.
abstract: Glycogen storage disease type Ia (GSD-Ia) is caused by a deficiency in glucose-6-phosphatase-alpha (G6Pase-alpha), a nine-transmembrane domain, endoplasmic reticulum-associated protein expressed primarily in the liver and kidney. Previously, we showed that infusion of an adeno-associated virus (AAV) serotype 2 vector carrying murine G6Pase-alpha (AAV2-G6Pase-alpha) into neonatal GSD-Ia mice failed to sustain their life beyond weaning. We now show that neonatal infusion of GSD-Ia mice with an AAV serotype 1-G6Pase-alpha (AAV1-G6Pase-alpha) or AAV serotype 8-G6Pase-alpha (AAV8-G6Pase-alpha) results in hepatic expression of the G6Pase-alpha transgene and markedly improves the survival of the mice. However, only AAV1-G6Pase-alpha can achieve significant renal transgene expression. A more effective strategy, in which a neonatal AAV1-G6Pase-alpha infusion is followed by a second infusion at age one week, provides sustained expression of a complete, functional, G6Pase-alpha system in both the liver and kidney and corrects the metabolic abnormalities in GSD-Ia mice for the 57 week length of the study. This effective use of gene therapy to correct metabolic imbalances and disease progression in GSD-Ia mice holds promise for the future of gene therapy in humans.
authors.affiliation: Section on Cellular Differentiation, Heritable Disorders Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
authors.forename: A
authors.initials: A
authors.lastname: Ghosh
authors.forename: M
authors.initials: M
authors.lastname: Allamarvdasht
authors.forename: C-J
authors.initials: CJ
authors.lastname: Pan
authors.forename: M-S
authors.initials: MS
authors.lastname: Sun
authors.forename: B C
authors.initials: BC
authors.lastname: Mansfield
authors.forename: B J
authors.initials: BJ
authors.lastname: Byrne
authors.forename: J Y
authors.initials: JY
authors.lastname: Chou
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D000229:Dependovirus / Q000235:genetics* / Q000276:immunology; D015870:Gene Expression; D015316:Genetic Therapy / Q000379:methods*; D005822:Genetic Vectors / Q000008:administration & dosage* / Q000235:genetics; D005952:Glucose-6-Phosphatase / Q000235:genetics*; D005953:Glycogen Storage Disease Type I / Q000201:enzymology / Q000628:therapy*; D007262:Infusions, Intravenous; D007527:Isoenzymes / Q000235:genetics*; D007668:Kidney / Q000201:enzymology; D008099:Liver / Q000201:enzymology; D051379:Mice; D008817:Mice, Mutant Strains; D008861:Microsomes; D012703:Serotyping; D019076:Transgenes
chemical_list: D007527:Isoenzymes; D005952:Glucose-6-Phosphatase