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Highly versatile cell-penetrating peptide loaded scaffold for efficient and localised gene delivery to multiple cell types: From development to application in tissue engineering

Raftery, Rosanne M.; Walsh, David P.; Blokpoel Ferreras, Lia; Mencía Castaño, Irene; Chen, Gang; LeMoine, Mark; Osman, Gizem; Shakesheff, Kevin M.; Dixon, James E.; O'Brien, Fergal J.

Authors

Rosanne M. Raftery

David P. Walsh

Lia Blokpoel Ferreras

Irene Mencía Castaño

Gang Chen

Mark LeMoine

Gizem Osman

James E. Dixon

Fergal J. O'Brien



Abstract

Gene therapy has recently come of age with seven viral vector-based therapies gaining regulatory approval in recent years. In tissue engineering, non-viral vectors are preferred over viral vectors, however, lower transfection efficiencies and difficulties with delivery remain major limitations hampering clinical translation. This study describes the development of a novel multi-domain cell-penetrating peptide, GET, designed to enhance cell interaction and intracellular translocation of nucleic acids; combined with a series of porous collagen-based scaffolds with proven regenerative potential for different indications. GET was capable of transfecting cell types from all three germ layers, including stem cells, with an efficiency comparable to Lipofectamine® 3000, without inducing cytotoxicity. When implanted in vivo, GET gene-activated scaffolds allowed for host cell infiltration, transfection localized to the implantation site and sustained, but transient, changes in gene expression – demonstrating both the efficacy and safety of the approach. Finally, GET carrying osteogenic (pBMP-2) and angiogenic (pVEGF) genes were incorporated into collagen-hydroxyapatite scaffolds and with a single 2μg dose of therapeutic pDNA, induced complete repair of critical-sized bone defects within 4 weeks. GET represents an exciting development in gene therapy and by combining it with a scaffold-based delivery system offers tissue engineering solutions for a myriad of regenerative indications.

Journal Article Type Article
Publication Date 2019-09
Journal Biomaterials
Print ISSN 0142-9612
Electronic ISSN 1878-5905
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 216
Article Number 119277
APA6 Citation Raftery, R. M., Walsh, D. P., Blokpoel Ferreras, L., Mencía Castaño, I., Chen, G., LeMoine, M., …O'Brien, F. J. (2019). Highly versatile cell-penetrating peptide loaded scaffold for efficient and localised gene delivery to multiple cell types: From development to application in tissue engineering. Biomaterials, 216, doi:10.1016/j.biomaterials.2019.119277
DOI https://doi.org/10.1016/j.biomaterials.2019.119277
Keywords GET; Gene delivery; Cell-penetrating peptide; Tissue engineering; Bone regeneration
Publisher URL https://www.sciencedirect.com/science/article/pii/S014296121930376X?via%3Dihub
Additional Information This article is maintained by: Elsevier; Article Title: Highly versatile cell-penetrating peptide loaded scaffold for efficient and localised gene delivery to multiple cell types: From development to application in tissue engineering; Journal Title: Biomaterials; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016...omaterials.2019.119277; Content Type: article; Copyright: © 2019 Elsevier Ltd. All rights reserved.