| Literature DB >> 18945780 |
Alan L Parker1, Simon N Waddington, Suzanne M K Buckley, Jerome Custers, Menzo J E Havenga, Nico van Rooijen, Jaap Goudsmit, John H McVey, Stuart A Nicklin, Andrew H Baker.
Abstract
The deployment of adenovirus serotype 5 (Ad5)-based vectors is hampered by preexisting immunity. When such vectors are delivered intravenously, hepatocyte transduction is mediated by the hexon-coagulation factor X (FX) interaction. Here, we demonstrate that human sera efficiently block FX-mediated cellular binding and transduction of Ad5-based vectors in vitro. Neutralizing activity correlated well with the ability to inhibit Ad5-mediated liver transduction, suggesting that prescreening patient sera in this manner accurately predicts the efficacy of Ad5-based gene therapies. Neutralization in vitro can be partially bypassed by pseudotyping with Ad45 fiber protein, indicating that a proportion of neutralizing antibodies are directed against the Ad5 fiber.Entities:
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Year: 2008 PMID: 18945780 PMCID: PMC2612319 DOI: 10.1128/JVI.01878-08
Source DB: PubMed Journal: J Virol ISSN: 0022-538X Impact factor: 5.103