Cited by 29Virus-based gene therapy researchRetinal Development and DisordersRNA Interference and Gene Delivery

Novel AAV44.9-Based Vectors Display Exceptional Characteristics for Retinal Gene Therapy

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Boye, Sanford L., Choudhury, Shreyasi, Crosson, Sean, Di Pasquale, Giovanni, Afione, Sandra, Mellen, Russell, Makal, Victoria, Calabro, Kaitlyn R. +8 more·2020·Molecular Therapy

Abstract

The majority of inherited retinal diseases (IRDs) are caused by mutations in genes expressed in photoreceptors (PRs). The ideal vector to address these conditions is one that transduces PRs in large areas of retina with the smallest volume/lowest titer possible, and efficiently transduces foveal cones, the cells responsible for acute, daylight vision that are often the only remaining area of functional retina in IRDs. The purpose of our study was to evaluate the retinal tropism and potency of a novel capsid, AAV44.9, and rationally designed derivatives thereof. We found that AAV44.9 and AAV44.9(E531D) transduced retinas of subretinally injected (SRI) mice with higher efficiency than did benchmark AAV5- and AAV8-based vectors. In macaques, highly efficient cone and rod transduction was observed following submacular and peripheral SRI. AAV44.9- and AAV44.9(E531D)-mediated GFP fluorescence extended laterally well beyond SRI bleb margins. Notably, extrafoveal injection (i.e., fovea not detached during surgery) led to transduction of up to 98% of foveal cones. AAV44.9(E531D) efficiently transduced parafoveal and perifoveal cones, whereas AAV44.9 did not. AAV44.9(E531D) was also capable of restoring retinal function to a mouse model of IRD. These novel capsids will be useful for addressing IRDs that would benefit from an expansive treatment area.

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  • Extra-foveal SRI of AAV44.9-based vectors promoted 98% transduction of foveal cones in macaque without the need to detach the fovea during surgery.

    “extra-foveal SRI of such vectors (AAV44.9 based) promoted 98% transduction of foveal cones in macaque without the need to detach the fovea during surgery.112”

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Authors
Boye, S. L., Choudhury, S., Crosson, S., Di Pasquale, G., Afione, S., Mellen, R., Makal, V., Calabro, K. R., Fajardo, D., Peterson, J., Zhang, H., Leahy, M. T., Jennings, C. K., Chiorini, J. A., Boyd, R. F., & Boye, S. E.
Affiliations
  • University of Florida (US)
  • National Institutes of Health (US)
  • Charles River Laboratories (United States) (US)
Corresponding author
Boye, Shannon E.
Venue
Molecular Therapy
Publisher
Elsevier BV
Published
2020-06
Volume
28
Issue
6
Pages
1464-1478
ISSN
1525-0016 (ISSN-L)
OpenAlex
W3015577849
Cited by
29
References
62
Citations by year
2026: 4 · 2025: 5 · 2024: 1 · 2023: 4 · 2022: 7 · 2021: 6 · 2020: 2
FWCI
2.79
Type
journal article
Language
en
Open access
Locations
  • Molecular Therapy (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Dental and Craniofacial Research
  • University of Florida
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
Keywords
retinal gene therapy, inherited retinal disease, phototransduction, subretinal injection, AAV5, AAV8, rod photoreceptors
MeSH terms
Dependovirus, Animals, Disease Models, Animal, Fluorescent Antibody Technique, Genetic Engineering, Genetic Vectors, Macaca fascicularis, Ophthalmoscopy, Promoter Regions, Genetic, Retina, Retinal Diseases, Transduction, Genetic, Genetic Therapy, Gene Expression, Genes, Reporter, Retinal Rod Photoreceptor Cells, Retinal Cone Photoreceptor Cells, Gene Transfer Techniques, Microscopy, Confocal, Transgenes, Mice, Injections, Intraocular

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