Cited by 10Virus-based gene therapy researchRNA Interference and Gene DeliveryRetinal Development and Disorders

Neutralisation of adeno-associated virus transduction by human vitreous humour

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Andrzejewski, Sławomir, Moyle, Peter M., Stringer, Brett W., Steel, Jason C., Layton, Christopher J.·2021·Gene Therapy

Abstract

Neutralising antibodies (NAbs), caused by past adeno-associated virus (AAV) infection, represent a critical challenge for AAV-mediated gene therapy, with even low NAb titres capable of inhibiting gene transfer, however in protein-rich environments such as the vitreous it is expected that other constituents could also interact with the transduction process. Inhibition of AAV2/2, AAV2/5, AAV2/6 and AAV2/8 transduction by human vitreous humour (VH) obtained from 80 post-mortem eye cups was investigated in this report, with clinically relevant vitreous dilutions as low as 1:2. Unexpectedly, the highest prevalence of inhibition of transduction was observed against AAV2/6, with 66% of tested samples displaying neutralisation at a 1:2 VH dilution. Only two samples showed inhibition of AAV2/8, indicating this serotype is an attractive vector for use in non-vitrectomised eyes of unscreened individuals. Levels of anti-AAV NAbs observed in the VH were much lower than previously observed in serum of a similar Australian population. Among ten tested eye cup pairs, we observed only small variation in anti-AAV NAbs levels between the left and right eye cups. Interaction with 1:2 diluted VH had an augmentation effect on AAV2/8 transduction (p = 0.004), a phenomenon which was not due to albumin or transferrin and which, if developed, might benefit the use of AAV2/8 in clinical settings.

Integrity signals

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Crossref · 10.1038/s41434-020-0162-8

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55 of 55 references verified0 citation errors · 0 not checkable

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  • It is unclear at what level vitreous fluid antibodies become clinically impactful, though even low levels might exert functional consequences.

    “It is unclear at what level vitreous fluid antibodies become clinically impactful, though even low levels might exert functional consequences39.”

    From Investigation of Cas9 Antibodies in the Human Eye (2022) · cites this paper as [39]

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Authors
Andrzejewski, S., Moyle, P. M., Stringer, B. W., Steel, J. C., & Layton, C. J.
Affiliations
  • Translational Research Institute (AU)
  • The University of Queensland (AU)
  • Central Queensland University (AU)
Corresponding author
Layton, Christopher J.
Venue
Gene Therapy
Published
2020-06-15
Volume
28
Issue
5
Pages
242-255
ISSN
  • 0969-7128 (ISSN-L)
  • 1476-5462
OpenAlex
W3035160354
Cited by
10
References
55
Citations by year
2026: 2 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 2
FWCI
1.02
Type
journal article
Language
en
Open access
Locations
  • Gene Therapy (publishedVersion)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
Funders
  • Layton Vision Foundation
  • CQUniversity
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 › Retinal Development and Disorders
Keywords
adeno-associated virus, AAV2/8, AAV serotypes, vitreous humor, neutralizing antibodies, ocular gene therapy, vitrectomy, albumin, transferrin
MeSH terms
Dependovirus, Australia, Genetic Vectors, Humans, Transduction, Genetic, Vitreous Body, Genetic Therapy

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