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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Adenoviral gene delivery to solid tumors by recombinant silk-elastinlike protein polymers.

PURPOSE: The purpose of this study was to investigate the potential of silk-elastinlike protein polymers (SELPs) in controlling the release rate of adenoviruses in vitro and in vivo while preserving their bioactivity. MATERIALS AND METHODS: A hydrogel system composed of SELP/adenovirus mixture was prepared. The release of the adenovirus particles from the hydrogels was quantified by Real Time-PCR and the bioactivity of the released viruses was evaluated using confocal microscopy and beta-galactosidase assay. To demonstrate the ability of SELP in entrapping virus cargo and releasing it over a prolonged period of time in vivo, a SELP/adenovirus mixture was prepared and injected directly into xenograft tumor models of breast and head and neck cancer in mice. At various time points mice were sacrificed, tumors dissected, and tissue sections studied under confocal microscope. RESULTS: In vitro studies demonstrated that SELP hydrogels release viruses over a period of 4 weeks while preserving their bioactivity. After intratumoral injection, a prolonged and localized expression of adenoviruses was observed. CONCLUSIONS: These results suggest the potential of SELPs in local adenoviral delivery to solid tumors as an alternative approach to intratumoral virus infusion.[1]


  1. Adenoviral gene delivery to solid tumors by recombinant silk-elastinlike protein polymers. Hatefi, A., Cappello, J., Ghandehari, H. Pharm. Res. (2007) [Pubmed]
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