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• W2068167911 abstract "Background Chemical capsid modification of adenovirus vectors with synthetic polymers has been shown to aid in overcoming typical barriers for adenovirus vector-mediated gene transfer. Carbohydrate-based polymers for covalent modification of adenovirus vectors have been largely neglected so far. We utilized a reductive amination strategy to generate a novel class of adenovirus-based glycovectors with a mannan derivative. Methods Reductive amination to covalently couple polysaccharides to the capsid surface of adenovirus serotype 5-based vectors was investigated utilizing an oxidized derivative of mannan. After biochemical and physical characterization of mannanylated vectors, their performance was analysed in vitro in cell lines and primary human cells, and in vivo in mice after local and systemic vector injection. Results We describe the successful modification of adenovirus vectors with large polysaccharides by reductive amination. The particles were efficiently modified, physically intact and, importantly, detargeted from the natural Coxsackie and adenovirus receptor/integrin pathway in vitro. In addition, they exhibited significantly decreased transduction of muscle after local delivery and of liver after systemic delivery in mice. However, despite the modification of 60% of capsid surface amino groups, mannanylated particles were unable to evade neutralizing anti-Ad5 antibodies. Conclusions Mannanylated vectors are a paradigm for a novel class of glycoviruses modified with large polysaccharides. Vector promiscuity as one of the important hurdles for Ad-mediated gene transfer could be significantly decreased in vivo, whereas mannanylated vectors were unable to escape from anti-adenovirus antibodies. Our studies provide a detailed analysis of mannan-modified Ad vectors and suggest further improvements for this novel class of glycovectors. Copyright © 2008 John Wiley & Sons, Ltd." @default.
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• W2068167911 date "2008-12-01" @default.
• W2068167911 modified "2023-09-26" @default.
• W2068167911 title "Reductive amination as a strategy to reduce adenovirus vector promiscuity by chemical capsid modification with large polysaccharides" @default.
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• W2068167911 doi "https://doi.org/10.1002/jgm.1262" @default.
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