Cited by 1,381Virus-based gene therapy researchRNA Interference and Gene DeliveryViral Infectious Diseases and Gene Expression in Insects

Production of High-Titer Recombinant Adeno-Associated Virus Vectors in the Absence of Helper Adenovirus

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Xiao, Xiao, Li, Juan, Samulski, Richard Jude·1998·Journal of Virology

Abstract

Recently, efficient and long-term in vivo gene transfer by recombinant adeno-associated virus type 2 (rAAV) vectors has been demonstrated in a variety of tissues. Further improvement in vector titer and purity will expedite this in vivo exploration and provide preclinical information required for use in human gene therapy. In an effort to obtain higher titers, we constructed a novel AAV helper plasmid which utilizes translational control of AAV Rep genes (J. Li et al., J. Virol. 71:5236–5243, 1997). To address the issue of purity, in this study we report the first rAAV production method which is completely free of adenovirus (Ad) helper virus. The new production system uses a plasmid construct which contains a mini-Ad genome capable of propagating rAAV in the presence of AAV Rep and Cap genes. This construct is missing some of the early and most of the late Ad genes and is incapable of producing infectious Ad. Transfection of 293 cells with the new mini-Ad helper and AAV packaging plasmids results in high-titer rAAV vectors with yields greater than 1,000 transducing units, or 10 5 viral particles per cell. When rAAV vectors were produced by using this production scheme and compared to traditional heat-inactivated rAAV preparations in vitro and in vivo, we observed transduction equivalent to or better than normal levels. The complete removal of infectious Ad from AAV production should facilitate a better understanding of immune response to AAV vectors in vivo, eliminate the need for developing replication-competent Ad assays, and provide a more defined reagent for clinical use.

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Crossref · 10.1128/jvi.72.3.2224-2232.1998

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Authors
Xiao, X., Li, J., & Samulski, R. J.
Affiliations
  • <!--label omitted: 1-->Gene Therapy Center,1
  • University of North Carolina at Chapel Hill (US)
Venue
Journal of Virology
Published
1998-03
Volume
72
Issue
3
Pages
2224-2232
ISSN
  • 0022-538X (ISSN-L)
  • 1098-5514
OpenAlex
W2148223197
Cited by
1,381
References
3
Citations by year
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FWCI
29.99
Type
journal article
Language
en
Open access
Locations
  • Journal of Virology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01hl048347-09)
  • National Heart, Lung, and Blood Institute (P01HL051818, HL 48347, HL51818)
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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Viral Infectious Diseases and Gene Expression in Insects
Keywords
recombinant adeno-associated virus, transduction efficiency, vector titer, gene therapy vectors, 293 cells
MeSH terms
Dependovirus, Adenoviridae, Cell Line, Transformed, Cell Transformation, Viral, Genetic Vectors, Helper Viruses, Humans, Plasmids, Recombination, Genetic

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