| Literature DB >> 19854504 |
Tae-il Kim1, Minhyung Lee, Sung Wan Kim.
Abstract
Guanidinylated bioreducible polymer (GBP) was developed for gene delivery systems utilizing cellular penetrating ability of guanidine groups. GBP could retard pDNA from a weight ratio of 5 completely in agarose gel electrophoresis but pDNA was released from GBP polyplexes even at a weight ratio of 20 in reducing condition (2.5mm DTT) due to their biodegradation. GBP also could construct 200 nm-sized and positively charged (approximately 30 mV) polyplex nanoparticles with pDNA. The cytotoxicity of GBP was found to be minimal and GBP showed about 8 folds improved transfection efficiency than a scaffold polymer, poly(cystaminebisacrylamide-diaminohexane) (poly(CBA-DAH)) and even higher transfection efficiency than PEI25k in mammalian cell lines. Its high cellular uptake efficiency (96.1%) and strong nuclear localization ability for pDNA delivery due to the structural advantage of bioreducible polymer and guanidine groups were also identified, suggesting GBP is a promising candidate for efficient gene delivery systems. (c) 2009 Elsevier Ltd. All rights reserved.Entities:
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Year: 2009 PMID: 19854504 PMCID: PMC2813999 DOI: 10.1016/j.biomaterials.2009.10.034
Source DB: PubMed Journal: Biomaterials ISSN: 0142-9612 Impact factor: 12.479