Cited by 181Virus-based gene therapy researchRNA Interference and Gene DeliveryBarrier Structure and Function Studies

Molecular evolution of adeno-associated virus for enhanced glial gene delivery

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Koerber, James T, Klimczak, Ryan, Jang, Jae-Hyung, Dalkara, Deniz, Flannery, John G, Schaffer, David V·2009·Molecular Therapy

Abstract

The natural tropism of most viral vectors, including adeno-associated viral (AAV) vectors, leads to predominant transduction of neurons and epithelia within the central nervous system (CNS) and retina. Despite the clinical relevance of glia for homeostasis in neural tissue, and as causal contributors in genetic disorders such as Alzheimer's and amyotrophic lateral sclerosis, efforts to develop more efficient gene delivery vectors for glia have met with limited success. Recently, viral vector engineering involving high-throughput random diversification and selection has enabled the rapid creation of AAV vectors with valuable new gene delivery properties. We have engineered novel AAV variants capable of efficient glia transduction by employing directed evolution with a panel of four distinct AAV libraries, including a new semi-random peptide replacement strategy. These variants transduced both human and rat astrocytes in vitro up to 15-fold higher than their parent serotypes, and injection into the rat striatum yielded astrocyte transduction levels up to 16% of the total transduced cell population, despite the human astrocyte selection platform. Furthermore, one variant exhibited a substantial shift in tropism toward Müller glia within the retina, further highlighting the general utility of these variants for efficient glia transduction in multiple species within the CNS and retina.

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Authors
Koerber, J. T., Klimczak, R., Jang, J.-H., Dalkara, D., Flannery, J. G., & Schaffer, D. V.
Affiliations
University of California, Berkeley (US)
Corresponding author
Schaffer, David V
Venue
Molecular Therapy
Publisher
Elsevier BV
Published
2009-12
Volume
17
Issue
12
Pages
2088-2095
ISSN
1525-0016 (ISSN-L)
OpenAlex
W2117029319
Cited by
181
References
54
Citations by year
2026: 5 · 2025: 7 · 2024: 14 · 2023: 8 · 2022: 10 · 2021: 11 · 2020: 12 · 2019: 6 · 2018: 5 · 2017: 11 · 2016: 10 · 2015: 18 · 2014: 14 · 2013: 13 · 2012: 10
FWCI
7.21
Type
journal article
Language
en
Open access
Locations
  • Molecular Therapy (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Eye Institute (R21EY016994, R01EY014375)
  • National Institute of General Medical Sciences (T32 GM08352, T32GM008352)
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 › Neuroscience › Neurology › Barrier Structure and Function Studies
Keywords
adeno-associated virus vectors, Müller cells, viral tropism, directed evolution, AAV serotypes, central nervous system, retina, striatum, viral vector engineering
MeSH terms
Dependovirus, Animals, Astrocytes, Cells, Cultured, Genetic Vectors, Glioblastoma, Humans, Neuroblastoma, Serotyping, Transduction, Genetic, Drug Delivery Systems, Rats, Sprague-Dawley, Gene Transfer Techniques, Directed Molecular Evolution, Green Fluorescent Proteins, Rats

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