AI Article Synopsis
- Reengineering AAV receptor footprints can improve variants for clinical use.
- A panel of synthetic AAV2 vectors was developed by modifying a heparan sulfate receptor footprint, resulting in chimeric capsids with systemic delivery capabilities in mice.
- One variant, AAV2i8, demonstrated enhanced muscle targeting, reduced liver accumulation, and a unique antigenic profile, making it promising for gene therapy in musculoskeletal disorders.
Article Abstract
Reengineering the receptor footprints of adeno-associated virus (AAV) isolates may yield variants with improved properties for clinical applications. We generated a panel of synthetic AAV2 vectors by replacing a hexapeptide sequence in a previously identified heparan sulfate receptor footprint with corresponding residues from other AAV strains. This approach yielded several chimeric capsids displaying systemic tropism after intravenous administration in mice. Of particular interest, an AAV2/AAV8 chimera designated AAV2i8 displayed an altered antigenic profile, readily traversed the blood vasculature, and selectively transduced cardiac and whole-body skeletal muscle tissues with high efficiency. Unlike other AAV serotypes, which are preferentially sequestered in the liver, AAV2i8 showed markedly reduced hepatic tropism. These features of AAV2i8 suggest that it is well suited to translational studies in gene therapy of musculoskeletal disorders.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2912150 | PMC |
| http://dx.doi.org/10.1038/nbt.1599 | DOI Listing |
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