Cited by 547Virus-based gene therapy researchRNA Interference and Gene DeliveryViral Infectious Diseases and Gene Expression in Insects

Adeno-associated virus terminal repeat (TR) mutant generates self-complementary vectors to overcome the rate-limiting step to transduction in vivo

McCarty, D M, Fu, H, Monahan, P E, Toulson, C E, Naik, P, Samulski, R J·2003·Gene Therapy

Abstract

An important limitation of recombinant adeno-associated virus (rAAV) vector efficiency is the requirement of hostcell-mediated synthesis of double-stranded DNA from the single-stranded genome. We have bypassed this step in a specialized self-complementary rAAV (scAAV) vector, by utilizing the tendency of AAV to package DNA dimers when the replicating genome is half the length of the wild type (wt). To produce these vectors efficiently, we have deleted the terminal resolution site (trs) from one rAAV TR, preventing the initiation of replication at the mutated end. These constructs generate single-stranded, inverted repeat genomes, with a wt TR at each end, and a mutated TR in the middle. After uncoating, the viral DNA folds through intramolecular base pairing within the mutant TR, which then proceeds through the genome to form a double-stranded molecule. We have used the scAAV to investigate barriers to rAAV transduction in the mouse liver, muscle and brain. In each tissue, scAAV was characterized by faster onset of gene expression and higher transduction efficiency. This study confirms earlier predictions that complementary-strand DNA synthesis is the primary barrier to rAAV-2 transduction. The scAAV is unaffected by this barrier, and provides an extremely efficient vector for gene transfer into many types of cells in vivo.

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Crossref · 10.1038/sj.gt.3302134

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Authors
McCarty, D. M., Fu, H., Monahan, P. E., Toulson, C. E., Naik, P., & Samulski, R. J.
Affiliations
University of North Carolina at Chapel Hill (US)
Venue
Gene Therapy
Published
2003-11-17
Volume
10
Issue
26
Pages
2112-2118
ISSN
  • 0969-7128 (ISSN-L)
  • 1476-5462
OpenAlex
W2081064825
Cited by
547
References
3
Citations by year
2026: 18 · 2025: 14 · 2024: 24 · 2023: 25 · 2022: 23 · 2021: 23 · 2020: 23 · 2019: 22 · 2018: 24 · 2017: 20 · 2016: 21 · 2015: 25 · 2014: 28 · 2013: 36 · 2012: 33
FWCI
6.36
Type
journal article
Language
en
Open access
closed
Locations
  • Gene Therapy (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (P01HL051818, HL 03960, P01-HL51818-06, P01HL066973, P01-HL66973-01)
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
adeno-associated virus, terminal repeats, self-complementary AAV vectors, intramolecular base pairing, transduction efficiency, in vivo gene delivery, liver, muscle, brain
MeSH terms
Dependovirus, Animals, Brain, DNA Replication, DNA, Viral, Genetic Vectors, Transduction, Genetic, Gene Deletion, Terminal Repeat Sequences, Hepatocytes, Muscle Cells, Mice

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