Journal
INTERNATIONAL JOURNAL OF PHARMACEUTICS
Volume 421, Issue 2, Pages 397-404Publisher
ELSEVIER
DOI: 10.1016/j.ijpharm.2011.10.019
Keywords
Heparin; Adeno-associated virus; Iron oxide nanoparticle; Magnetism
Categories
Funding
- Advanced Biomass R&D Center (ABC) of Korea [2010-0029734]
- National Research Foundation
- Korea Government (MEST) [2011-0027727]
- National Research Foundation of Korea [2010-0029734] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Superparamagnetic iron oxide nanoparticles (SPIONs) have been exploited as an elegant vehicle to enhance gene delivery efficiencies in gene therapy applications. We developed a magnetically guided adeno-associated virus (AAV) delivery system for enhancing gene delivery to HEK293T and PC12 cell lines. Wild-type AAV2 and a novel AAV vector, AAVr3.45, which was directly evolved in a previous study to possess diverse cell tropisms, were used as gene carriers. Additionally, the affinity of each viral vector to heparin was employed as a moiety to immobilize virus onto heparin-coated SPIONs (HpNPs). Magnetically guided AAV delivery resulted fast and efficient cellular transduction. Importantly, a short exposure of virus to target cells under a magnetic field (<180 min) yielded comparable transduction produced by the conventional gene-delivery protocol (i.e., 24 h-incubation of virus with target cells prior to replacing with fresh medium). Additionally, magnetic guidance of AAV encoding nerve growth factor (NGF) produced sufficient functional NGF, leading to robust neurite elongation by P02 as compared to direct NGF protein delivery or non-magnetic delivery. The successful establishment of a magnetically guided AAV delivery system, with the ability to efficiently and rapidly infect target cells, will provide a powerful platform for a variety of gene therapy applications. (C) 2011 Elsevier B.V. All rights reserved.
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