Cited by 101Virus-based gene therapy researchRNA Interference and Gene DeliveryViral Infectious Diseases and Gene Expression in Insects

The woodchuck hepatitis virus post-transcriptional regulatory element reduces readthrough transcription from retroviral vectors

Higashimoto, T, Urbinati, F, Perumbeti, A, Jiang, G, Zarzuela, A, Chang, L-J, Kohn, D B, Malik, P·2007·Gene Therapy

Abstract

The woodchuck hepatitis virus post-transcriptional regulatory element (WPRE) increases transgene expression from a variety of viral vectors, although the precise mechanism is not known. WPRE is most effective when placed downstream of the transgene, proximal to the polyadenylation signal. We hypothesized that WPRE likely reduces viral mRNA readthrough transcription by improving transcript termination, which in turn would increase viral titers and expression. Using a Cre-lox-mediated plasmid-based assay, we found significant readthrough transcription from gamma-retroviral vector (RV) long terminal repeat (wt RV-LTR) and RV LTR with a self-inactivating deletion (SIN RV-LTR). WPRE, when placed upstream of the RV LTRs, significantly reduced readthrough transcription. Readthrough, present at much lower levels with the SIN HIV-1 LV-LTR, was also reduced with WPRE. When placed in RV vectors, WPRE increased total RV genomic mRNA; and increased viral titers from transiently transfected 293T cells and stable PG13 producer cells by 7- to 15-fold. The mechanism of increased titers and expression was not due to increased nuclear mRNA export, increased rate of viral transcription or a significant increase in viral mRNA half-life. Our results showed that WPRE improved vector genomic transcript termination to increase titers and expression from RVs.

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Crossref · 10.1038/sj.gt.3302979

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  • WPRE is often included in AAV cassettes to improve viral titer and transduction efficiency via stabilizing mRNA and regulating transcriptional termination.

    “The woodchuck hepatitis post-transcriptional regulatory element (WPRE) is often included in AAV cassettes to improve viral titer and transduction efficiency via stabilizing mRNA and regulating transcriptional termination [26, 27].”

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Authors
Higashimoto, T., Urbinati, F., Perumbeti, A., Jiang, G., Zarzuela, A., Chang, L.-J., Kohn, D. B., & Malik, P.
Affiliations
  • University of Southern California (US)
  • University of Florida (US)
Corresponding author
Malik, P
Venue
Gene Therapy
Published
2007-06-28
Volume
14
Issue
17
Pages
1298-1304
ISSN
  • 0969-7128 (ISSN-L)
  • 1476-5462
OpenAlex
W1975554944
Cited by
101
References
34
Citations by year
2026: 13 · 2025: 9 · 2024: 10 · 2023: 2 · 2022: 10 · 2021: 4 · 2020: 3 · 2019: 3 · 2018: 1 · 2017: 6 · 2016: 3 · 2015: 2 · 2014: 6 · 2013: 3 · 2012: 5
FWCI
2.86
Type
journal article
Language
en
Open access
closed
Locations
  • Gene Therapy (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5u54hl070595-05)
  • National Heart, Lung, and Blood Institute (P01HL073104, U54-HL070595, R01-HL70135-01, R01HL070135)
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
read-through transcription, retroviral vectors, long terminal repeat, HIV-1 long terminal repeat, viral titer, transgene expression, polyadenylation signal
MeSH terms
Animals, Cell Line, Genetic Engineering, Genetic Vectors, Humans, Leukemia Virus, Murine, Retroviridae, RNA Processing, Post-Transcriptional, Transcription, Genetic, Transfection, Simian Immunodeficiency Virus, Gene Expression, Gene Expression Regulation, Viral, Reading Frames, Hepatitis B Virus, Woodchuck, Transgenes, Terminal Repeat Sequences, Regulatory Elements, Transcriptional

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