Cited by 52Retinal Development and DisordersCRISPR and Genetic EngineeringVirus-based gene therapy research

High-efficiency base editing in the retina in primates and human tissues

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Muller, Alissa, Sullivan, Jack, Schwarzer, Wibke, Wang, Mantian, Park-Windhol, Cindy, Hasler, Pascal W., Janeschitz-Kriegl, Lucas, Duman, Mert +41 more·2025·Nature Medicine

Abstract

Stargardt disease is a currently untreatable, inherited neurodegenerative disease that leads to macular degeneration and blindness due to loss-of-function mutations in the ABCA4 gene. We have designed a dual adeno-associated viral vector encoding a split-intein adenine base editor to correct the most common mutation in ABCA4 (c.5882G>A, p.Gly1961Glu). We optimized ABCA4 base editing in human models, including retinal organoids, induced pluripotent stem cell-derived retinal pigment epithelial (RPE) cells, as well as adult human retinal explants and RPE/choroid explants in vitro. The resulting gene therapy vectors achieved high levels of gene correction in mutation-carrying mice and in female nonhuman primates, with average editing of 75% of cones and 87% of RPE cells in vivo, which has the potential to translate to a clinical benefit. No off-target editing was detectable in human retinal explants and RPE/choroid explants. The high editing rates in primates show promise for efficient gene editing in other ocular diseases that are targetable by base editing.

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Authors
Muller, A., Sullivan, J., Schwarzer, W., Wang, M., Park-Windhol, C., Hasler, P. W., Janeschitz-Kriegl, L., Duman, M., Klingler, B., Matsell, J., Hostettler, S. M., Galliker, P., Hou, Y., Balmer, P., Virág, T., Barrera, L. A., Young, L., Xu, Q., Magda, D. P., Kilin, F., Khadka, A., Moreau, P.-H., Fellmann, L., Azoulay, T., Quinodoz, M., Karademir, D., Leppert, J., Fratzl, A., Kosche, G., Sharma, R., Montford, J., Cattaneo, M., Croyal, M., Cronin, T., Picelli, S., Grison, A., Cowan, C. S., Kusnyerik, Á., Anders, P., Renner, M., Nagy, Z. Z., Szabó, A., Bharti, K., Rivolta, C., Scholl, H. P. N., Bryson, D., Ciaramella, G., Roska, B., & György, B.
Affiliations
  • University of Basel (CH)
  • Beam Therapeutics (United States) (US)
  • Semmelweis University (HU)
  • Université de Strasbourg (FR)
  • University of Leicester (GB)
  • National Institutes of Health (US)
  • Centre National de la Recherche Scientifique (FR)
Corresponding author
  • Roska, Botond
  • György, Bence
Venue
Nature Medicine
Published
2025-01-08
Volume
31
Issue
2
Pages
490-501
ISSN
  • 1078-8956 (ISSN-L)
  • 1546-170X
OpenAlex
W4406152275
Cited by
52
References
53
Citations by year
2026: 26 · 2025: 26
FWCI
15.63
Type
journal article
Language
en
Open access
Locations
  • Nature Medicine (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by)
Funders
  • National Science Foundation
  • European Molecular Biology Organization (postdoctoral fellowship ALTF 688-2022)
  • Wellcome Trust
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (204285, 192665, 51NF40, 138726, 182895, 202756, 201165, 310030)
  • Semmelweis Egyetem (TKP 2021 EGA-25)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
Keywords
Stargardt disease, ABCA4, base editing, adeno-associated virus vectors, retinal organoids, retinal pigment epithelial cells, retinal explants, choroid, non-human primates, macular degeneration, gene therapy, off-target editing
MeSH terms
Gene Editing, Stargardt Disease, Dependovirus, Animals, Female, Genetic Vectors, Humans, Macular Degeneration, Male, Mutation, Organoids, Primates, Retina, Genetic Therapy, ATP-Binding Cassette Transporters, Mice, Retinal Pigment Epithelium, Induced Pluripotent Stem Cells

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