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Engineering viral vectors for acoustically targeted gene delivery
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Journal Article
Engineering viral vectors for acoustically targeted gene delivery
2024
Overview
Targeted gene delivery to the brain is a critical tool for neuroscience research and has significant potential to treat human disease. However, the site-specific delivery of common gene vectors such as adeno-associated viruses (AAVs) is typically performed via invasive injections, which limit its applicable scope of research and clinical applications. Alternatively, focused ultrasound blood-brain-barrier opening (FUS-BBBO), performed noninvasively, enables the site-specific entry of AAVs into the brain from systemic circulation. However, when used in conjunction with natural AAV serotypes, this approach has limited transduction efficiency and results in substantial undesirable transduction of peripheral organs. Here, we use high throughput in vivo selection to engineer new AAV vectors specifically designed for local neuronal transduction at the site of FUS-BBBO. The resulting vectors substantially enhance ultrasound-targeted gene delivery and neuronal tropism while reducing peripheral transduction, providing a more than ten-fold improvement in targeting specificity in two tested mouse strains. In addition to enhancing the only known approach to noninvasively target gene delivery to specific brain regions, these results establish the ability of AAV vectors to be evolved for specific physical delivery mechanisms.
Targeted gene delivery to the brain is a critical tool for neuroscience research and has significant potential to treat human disease. Here the authors engineer the protein shell of a common gene therapy vector for enhanced efficiency and specificity of brain delivery in ultrasound-targeted brain regions.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
