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- W2144455418 abstract "Gene delivering biomaterials have increasingly been employed to modulate the cellular microenvironment to promote tissue regeneration, yet low transduction efficiency has been a persistent challenge for in vivo applications. In this report, we investigated the surface modification of poly(lactide-co-glycolide) (PLG) scaffolds with polysaccharides, which have been implicated in binding lentivirus but have not been used for delivery. Chitosan was directly conjugated onto PLG scaffolds, whereas heparin and hyaluronan were indirectly conjugated onto PLG scaffolds with multi-amine crosslinkers. The addition of chitosan and heparin onto PLG promoted the association of lentivirus to these scaffolds and enhanced their transduction efficiency in vitro relative to hyaluronan-conjugated and control scaffolds that had limited lentivirus association and transduction. Transduction efficiency in vitro was increased partly due to an enhanced retention of virus on the scaffold as well as an extended half-life of viral activity. Transduction efficiency was also evaluated in vivo using porous, multiple channel PLG bridges that delivered lentivirus to the injured mouse spinal cord. Transgene expression persisted for weeks after implantation, and was able to enhance axon growth and myelination. These studies support gene-delivering PLG scaffolds for in vivo regenerative medicine applications." @default.
- W2144455418 created "2016-06-24" @default.
- W2144455418 creator A5036176854 @default.
- W2144455418 creator A5083516725 @default.
- W2144455418 date "2013-09-01" @default.
- W2144455418 modified "2023-10-07" @default.
- W2144455418 title "Polysaccharide-modified scaffolds for controlled lentivirus delivery in vitro and after spinal cord injury" @default.
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- W2144455418 doi "https://doi.org/10.1016/j.jconrel.2013.06.013" @default.
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