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Poly-L-lysine improves gene transfer with adenovirus formulated in PLGA microspheres

Gene Therapy volume 6, pages 1558–1564 (1999)Cite this article

Abstract

In vivo gene transfer with recombinant adenovirus vectors can be hindered by the immunogenicity of the adenovirus capsid proteins. Previous work showed that formulation of the vector with biodegradable polymers such as poly-lactic-glycolic acid (PLGA), polyethylene glycol (PEG), or lipids, may shield the virus from inhibition by neutralizing antibodies. Formulation of adenovirus in PLGA microspheres also allowed for extended release in vitro. In experiments described here, we found that the surfactant used in the formation of the primary emulsion could significantly improve the overall yield of virus released. We also tested the effects of adding poly-L-lysine to adenovirus before encapsulation with PLGA. Our results show that although PLL did not effect the yield of virus encapsulated or released from the microspheres, it significantly improved the efficiency of gene transfer after release from the polymer.

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Acknowledgements

The authors would like to thank the University of Iowa Gene Transfer Vector Core supported, in part, by the Carver Foundation. This work was supported in part by the NIH (R43-CA67357). CBM is the recipient of a predoctoral fellowship from the Iowa Affiliate, American Heart Foundation.

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Authors and Affiliations

  1. Department of Internal Medicine, University of Iowa College of Medicine, Iowa City, IA, USA

    C B Matthews & B L Davidson

  2. Therapeutic Systems Research Laboratories, Inc, Ann Arbor, MI, USA

    G Jenkins & J M Hilfinger

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  1. C B Matthews
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  2. G Jenkins
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  3. J M Hilfinger
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  4. B L Davidson
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Matthews, C., Jenkins, G., Hilfinger, J. et al. Poly-L-lysine improves gene transfer with adenovirus formulated in PLGA microspheres. Gene Ther 6, 1558–1564 (1999). https://doi.org/10.1038/sj.gt.3300978

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