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PEG shielded MMP sensitive CPPs for efficient and tumor specific gene delivery in vivo
Stockholm University, Faculty of Science, Department of Neurochemistry. University of Tartu, Estonia.ORCID iD: 0000-0002-6440-7577
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Number of Authors: 7
2015 (English)In: Journal of Controlled Release, ISSN 0168-3659, E-ISSN 1873-4995, Vol. 209, 238-247 p.Article in journal (Refereed) Published
Abstract [en]

Gene therapy has great potential to treat a range of different diseases, such as cancer. For that therapeutic gene can be inserted into a plasmid vector and delivered specifically to tumor cells. The most frequently used applications utilize lipoplex and polyplex approaches where DNA is non-covalently condensed into nanoparticles. However, lack of in vivo efficacy is the major concern that hinders translation of such gene therapeutic applications into clinics. In this work we introduce a novel method for in vivo delivery of plasmid DNA (pDNA) and efficient tumor-specific gene induction using intravenous (i.v) administration route. To achieve this, we utilize a cell penetrating peptide (CPP), PepFect14 (PF14), double functionalized with polyethylene glycol (PEG) and a matrix metalloprotease (MMP) substrate. We show that this delivery vector effectively forms nanoparticles, where the condensed CPP and pDNA are shielded by the PEG, in an MMP-reversible manner. Administration of the complexes results in efficient induction of gene expression specifically in tumors, avoiding normal tissues. This strategy is a potent gene delivery platform that can be used for tumor-specific induction of a therapeutic gene.

Place, publisher, year, edition, pages
2015. Vol. 209, 238-247 p.
Keyword [en]
Gene delivery, Tumor, PEGylation, Cell-penetrating peptide, Non-covalent complexes, Matrix metalloprotease
National Category
Chemical Sciences Biological Sciences Pharmacology and Toxicology
URN: urn:nbn:se:su:diva-119123DOI: 10.1016/j.jconrel.2015.04.038ISI: 000355674300025OAI: diva2:843813
Available from: 2015-07-31 Created: 2015-07-29 Last updated: 2015-09-04Bibliographically approved

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Lehto, TönisLangel, Ülo
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Department of Neurochemistry
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ReferencesLink to record
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