Cited by 195Virus-based gene therapy researchRNA Interference and Gene DeliveryViral Infectious Diseases and Gene Expression in Insects

The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.

Titration of AAV-2 particles via a novel capsid ELISA: packaging of genomes can limit production of recombinant AAV-2

Abstract

We demonstrate the rapid and reliable quantification of physical AAV-2 (adeno-associated virus type 2) particles via a novel ELISA based on a monoclonal antibody which selectively recognizes assembled AAV-2 capsids. Titration of a variety of recombinant AAV-2 (rAAV) preparations revealed that at least 80+percent of all particles were empty, compared with a maximum of 50percent in wild-type AAV-2 stocks, indicating that the recombinant genomes were less efficiently encapsidated. This finding was confirmed upon titration of CsCl gradient fractions from recombinant and wild-type AAV-2 stocks. ELISA-based measurement of capsid numbers revealed a large number of physical particles with low densities corresponding to empty capsids in the recombinant, but not in the wild-type AAV-2 preparations. Moreover, additional expression of VP proteins during rAAV production was found to result in an excessive capsid formation, whilst yielding only minor increases in DNA-containing or transducing rAAV particles. We conclude that encapsidation of viral genomes rather than capsid assembly can be limiting for rAAV production, provided that a critical level of VP expression is maintained. The feasibility of quantifying AAV-2 capsid numbers via the ELISA allows determination of physical to DNA-containing or infectious particle ratios. These are important parameters which should help to optimize and standardize the production and application of recombinant AAV-2.

Overview

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Crossref · 10.1038/sj.gt.3300946

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42 of 42 references verified0 citation errors · 0 not checkable

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Research works printed but not linked: 1

  1. Rittner K, Stoppler H, Pawlita M, Sczakiel G . Versatile eucaryotic vectors for strong and constitutive transient and stable gene expression Meth Mol Cell Biol 1991 2: 176–181

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Items 101–195 of 195

Metadata

Authors
Grimm, D., Kern, A., Pawlita, M., Ferrari, F. K., Samulski, R. J., & Kleinschmidt, J. A.
Affiliations
  • German Cancer Research Center (DE)
  • Princeton University (US)
  • University of North Carolina at Chapel Hill (US)
Venue
Gene Therapy
Published
1999-07
Volume
6
Issue
7
Pages
1322-1330
ISSN
  • 0969-7128 (ISSN-L)
  • 1476-5462
OpenAlex
W2079090019
Cited by
195
References
42
Citations by year
2026: 5 · 2025: 6 · 2024: 9 · 2023: 8 · 2022: 3 · 2021: 10 · 2020: 9 · 2019: 5 · 2018: 5 · 2017: 4 · 2016: 3 · 2015: 2 · 2014: 5 · 2013: 6 · 2012: 13
FWCI
3.53
Type
journal article
Language
en
Open access
closed
Locations
  • Gene Therapy (publishedVersion)
  • PubMed (publishedVersion)
Funders
Bundesministerium für Bildung und Forschung
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 type 2, empty capsids, capsid assembly, viral vector production, monoclonal antibodies
MeSH terms
Dependovirus, Antibodies, Monoclonal, Capsid, Enzyme-Linked Immunosorbent Assay, Genetic Engineering, Genetic Vectors, Humans, Genetic Therapy

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