ArticleFrontiers in medicine2025
Distinct infectivity and neutralization antibody responses in the highly homologous AAV Go.1 and AAV5.
Article in Frontiers in medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Goat-derived adeno-associated virus (AAV) vectors, such as AAV Go.1, represent a novel platform for gene therapy due to their unique origin and potential advantages in transduction efficiency and immune evasion. However, their therapeutic potential and biological properties remain underexplored. Methods: In this study, we developed a recombinant AAV (rAAV) Go.1 by replacing the goat AAV rep gene with the standard AAV2-rep gene to improve packaging efficiency. We compared the transduction efficiency of rAAV Go.1 with that of AAV5, a closely related serotype with 95% genome similarity, both Results: The rep gene modification led to a significantly higher packaging efficiency for rAAV Go.1 compared to the original goat AAV. rAAV Go.1 exhibited markedly higher transduction efficiency than AAV5 in both in vitro and in vivo models. Furthermore, rAAV Go.1 demonstrated a 4-fold increase in resistance to neutralization by sera from rAAV5-immunized mice. A study involving 20 healthy volunteers revealed that high-titer neutralizing antibodies had a more pronounced inhibitory effect on rAAV5 compared to rAAV Go.1. Mutagenesis studies identified key modifications that enhanced viral properties: K32R, K91R, and K122R mutations in the VP1u region significantly improved viral production, while K137R (VP1u) enhanced transduction efficiency Discussion: Our findings highlight the potential of rAAV Go.1 as an improved gene therapy vector with superior transduction efficiency and enhanced immune evasion. The identified VP1 mutations further optimize viral properties, making rAAV Go.1 a promising candidate for future therapeutic applications.
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