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Engineering fibrinogen-binding VSV-G envelope for spatially- and cell-controlled lentivirus delivery through fibrin hydrogels

Paper ID Volume ID Publish Year Pages File Format Full-Text
8039 574 2011 10 PDF Available
Title
Engineering fibrinogen-binding VSV-G envelope for spatially- and cell-controlled lentivirus delivery through fibrin hydrogels
Abstract

We recently demonstrated that fibrin hydrogels can be used as vehicles for efficient lentivirus gene delivery. Gene transfer in fibrin gels was strongly dependent on matrix degradation by target cells but a fraction of lentiviral particles diffused out of the gels over time compromising spatial control of gene transfer. To overcome this challenge, we engineered lentiviral particles that bind covalently to fibrin during polymerization. To this end, we fused into the viral envelope glycoprotein (VSV-G) peptide domains that are recognized by factor XIII and protease cleavage sites that are recognized by plasmin. Lentivirus pseudotyped with the modified envelopes bound to fibrinogen in a factor XIII dose dependent manner and was released upon plasmin treatment. The peptide/VSV-G fusion envelope variants did not compromise the transduction efficiency of the resulting virus except when lacking any flexible linkers separating the peptide from the VSV-G envelope. Diffusion of virus from the gels decreased dramatically, especially at high concentrations of FXIII, even for fibrin gels with low fibrinogen concentration that were loaded with high titer virus. Lentivirus arrays prepared with fibrin-conjugated lentivirus yielded highly efficient gene transfer that was confined to virus-containing fibrin spots. As a result, signal/noise ratio increased and cross-contamination between neighboring sites was minimal. Finally, in addition to lentivirus microarrays this strategy may be used to achieve spatially-controlled gene transfer for therapeutic applications.

Keywords
Lentivirus; Genetically engineered envelope; Fibrin; Live cell array; Microarray
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Engineering fibrinogen-binding VSV-G envelope for spatially- and cell-controlled lentivirus delivery through fibrin hydrogels
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 32, Issue 12, April 2011, Pages 3330–3339
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us