Cited by 76Virus-based gene therapy researchRNA Interference and Gene DeliverySARS-CoV-2 and COVID-19 Research

AAVrh.10 immunogenicity in mice and humans. Relevance of antibody cross-reactivity in human gene therapy

Thwaite, R, Pagès, G, Chillón, M, Bosch, A·2015·Gene Therapy

Abstract

Simian adeno-associated virus (AAV) serotype rh.10 is a promising gene therapy tool, achieving safe, sustained transgene expression in the nervous system, lung, liver and heart in animal models. To date, preexisting immunity in humans has not been confirmed, though exposure is unexpected. We compared the humoral immune response with serotypes AAVrh.10 and AAV9 in mice, and AAVrh.10, AAV9 and AAV2 in 100 healthy humans. Mice, injected-intravenously, raised significantly more anti-AAV9 than anti-AAVrh.10 IgG (immunoglobulins), and sera demonstrated greater neutralizing capacity, correspondingly. Antibody cross-binding studies in mice showed negligible cross-recognition between AAVrh.10, AAV9 and AAV2. In humans, IgG prevalence against the most common human serotype, AAV2, was 72%; AAV9, 47% and AAVrh.10, a surprising, 59%. Yet, neutralizing-antibody seroprevalences were 71% for AAV2, 18% for AAV9 and 21% for AAVrh.10. Thus, most anti-AAV9 and anti-AAVrh.10 IgG were nonneutralizing. Indeed, sera generally neutralized AAV2 more strongly than AAVrh.10. Further, all samples neutralizing AAVrh.10 or AAV9 also neutralized AAV2, suggesting antibody cross-recognition. This contrasts with the results in mice, and highlights the complexity of tailoring gene therapy to minimize the immune response in humans, when multiple-mixed infections during a lifetime evoke a broad repertoire of preexisting antibodies capable of cross reacting with non-human serotypes.

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Crossref · 10.1038/gt.2014.103

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Authors
Thwaite, R., Pagès, G., Chillón, M., & Bosch, A.
Affiliations
  • Universitat Autònoma de Barcelona (ES)
  • Institució Catalana de Recerca i Estudis Avançats (ES)
Corresponding author
Bosch, A
Venue
Gene Therapy
Published
2014-11-20
Volume
22
Issue
2
Pages
196-201
ISSN
  • 0969-7128 (ISSN-L)
  • 1476-5462
OpenAlex
W2034346308
Cited by
76
References
32
Citations by year
2026: 4 · 2025: 5 · 2024: 6 · 2023: 4 · 2022: 13 · 2021: 6 · 2020: 6 · 2019: 6 · 2018: 6 · 2017: 10 · 2016: 4 · 2015: 6
FWCI
4.37
Type
journal article
Language
en
Open access
closed
Locations
  • Gene Therapy (publishedVersion)
  • PubMed (publishedVersion)
Funders
Instituto de Salud Carlos III
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 › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
Keywords
adeno-associated virus serotypes, pre-existing immunity, humoral immune response, neutralizing antibodies, antibody cross-reactivity, AAV9, AAV2, seroprevalence, gene therapy vectors
MeSH terms
Dependovirus, Animals, Antibodies, Viral, Cross Reactions, Humans, Male, Mice, Inbred ICR, Protein Binding, Transduction, Genetic, Genetic Therapy

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