Complete correction of hyperphenylalaninemia following liver-directed, recombinant AAV2/8 vector-mediated gene therapy in murine phenylketonuria.

Journal Article

Novel recombinant adeno-associated virus vectors pseudotyped with serotype 8 capsid (rAAV2/8) have recently shown exciting promise as effective liver-directed gene transfer reagents. We have produced a novel liver-specific rAAV2/8 vector expressing the mouse phenylalanine hydroxylase (Pah) cDNA and have administered this vector to hyperphenylalaninemic PAH-deficient Pah(enu2) mice, a model of human phenylketonuria (PKU). Our hypothesis was that this vector would produce sufficient hepatocyte transduction frequency and PAH activity to correct blood phenylalanine levels in murine PKU. Portal vein injection of recombinant AAV2/8 vector into five adult Pah(enu2) mice yielded complete and stable (up to 17 weeks) correction of serum phenylalanine levels. Liver PAH activity was corrected to 11.5+/-2.4% of wild type liver activity and was associated with a significant increase in phenylalanine clearance following parenteral phenylalanine challenge. Although questions of long-term safety and stability of expression remain, recombinant AAV2/8-mediated, liver-directed gene therapy is a promising novel treatment approach for PKU and allied inborn errors of metabolism.

Full Text

Duke Authors

Cited Authors

  • Harding, CO; Gillingham, MB; Hamman, K; Clark, H; Goebel-Daghighi, E; Bird, A; Koeberl, DD

Published Date

  • March 2006

Published In

Volume / Issue

  • 13 / 5

Start / End Page

  • 457 - 462

PubMed ID

  • 16319949

International Standard Serial Number (ISSN)

  • 0969-7128

Digital Object Identifier (DOI)

  • 10.1038/sj.gt.3302678

Language

  • eng

Conference Location

  • England