Cited by 118Virus-based gene therapy researchRNA Interference and Gene DeliveryHemophilia Treatment and Research

Liver Transduction with Recombinant Adeno-Associated Virus Is Primarily Restricted by Capsid Serotype Not Vector Genotype

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Grimm, Dirk, Pandey, Kusum, Nakai, Hiroyuki, Storm, Theresa A., Kay, Mark A.·2006·Journal of Virology

Abstract

We and others have recently reported highly efficient liver gene transfer with adeno-associated virus 8 (AAV-8) pseudotypes, i.e., AAV-2 genomes packaged into AAV-8 capsids. Here we studied whether liver transduction could be further enhanced by using viral DNA packaging sequences (inverted terminal repeats [ITRs]) derived from AAV genotypes other than 2. To this end, we generated two sets of vector constructs carrying expression cassettes embedding a gfp gene or the human factor IX ( hfIX ) gene flanked by ITRs from AAV genotypes 1 through 6. Initial in vitro analyses of gfp vector DNA replication, encapsidation, and cell transduction revealed a surprisingly high degree of interchangeability among the six genotypes. For subsequent in vivo studies, we cross-packaged the six hfIX variants into AAV-8 and infused mice via the portal vein with doses of 5 × 10 10 to 1.8 × 10 12 particles. Notably, all vectors expressed comparably high plasma hFIX levels within a dose cohort over the following 6 months, concurrent with the finding of equivalent vector DNA copy numbers per cell. Partial hepatectomies resulted in ∼80% drops of hFIX levels and vector DNA copy numbers in all groups, indicating genotype-independent persistence of predominantly episomal vector DNA. Southern blot analyses of total liver DNA in fact confirmed the presence of identical and mostly nonintegrated molecular vector forms for all genotypes. We conclude that, unlike serotypes, AAV genotypes are not critical for efficient hepatocyte transduction and can be freely substituted. This corroborates our current model for AAV vector persistence in the liver and provides useful information for the future design and application of recombinant AAV.

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Crossref · 10.1128/jvi.80.1.426-439.2006

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Authors
Grimm, D., Pandey, K., Nakai, H., Storm, T. A., & Kay, M. A.
Affiliations
Stanford Medicine (US)
Corresponding author
Kay, Mark A.
Venue
Journal of Virology
Published
2006-01
Volume
80
Issue
1
Pages
426-439
ISSN
  • 0022-538X (ISSN-L)
  • 1098-5514
OpenAlex
W2158777932
Cited by
118
References
12
Citations by year
2026: 1 · 2025: 5 · 2024: 6 · 2023: 5 · 2022: 8 · 2021: 5 · 2020: 4 · 2019: 8 · 2018: 4 · 2017: 9 · 2016: 3 · 2015: 7 · 2014: 8 · 2013: 4 · 2012: 4
FWCI
3.78
Type
journal article
Language
en
Open access
Locations
  • Journal of Virology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL66948, U01HL066948)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Health Sciences › Medicine › Hematology › Hemophilia Treatment and Research
Keywords
adeno-associated virus, inverted terminal repeats, liver gene transfer, hepatocyte transduction, factor IX, partial hepatectomy, portal vein infusion
MeSH terms
Dependovirus, Animals, Capsid, DNA, Viral, Genetic Vectors, HeLa Cells, Humans, Liver, Mice, Inbred C57BL, Recombination, Genetic, Transduction, Genetic, Mice

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