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Biodistribution and blood clearance of plasmid DNA administered in arginine peptide complexes

Author(s): Woo Jung | Kim Na | Yang Jai | Shin Sungho

Journal: Genetic Vaccines and Therapy
ISSN 1479-0556

Volume: 9;
Issue: 1;
Start page: 13;
Date: 2011;
Original page

Keywords: Arginine peptide | Biodistribution | Gene therapy | Peptide vector | Systemic gene delivery

Abstract Background Peptide/DNA complexes have great potential as non-viral methods for gene delivery. Despite promising results for peptide-mediated gene delivery technology, an effective systemic peptide-based gene delivery system has not yet been developed. Methods This study used pCMV-Luc as a model gene to investigate the biodistribution and the in vivo efficacy of arginine peptide-mediated gene delivery by polymerase chain reaction (PCR). Results Plasmid DNA was detected in all organs tested 1 h after intraperitoneal administration of arginine/DNA complexes, indicating that the arginine/DNA complexes disseminated widely through the body. The plasmid was primarily detected in the spleen, kidney, and diaphragm 24 h post administration. The mRNA expression of plasmid DNA was noted in the spleen, kidney, and diaphragm for up to 2 weeks, and in the other major organs, for at least 1 week. Blood clearance studies showed that injected DNA was found in the blood as long as 6 h after injection. Conclusions Taken together, our results demonstrated that arginine/DNA complexes are stable in blood and are effective for in vivo gene delivery. These findings suggest that intraperitoneal administration of arginine/DNA complexes is a promising tool in gene therapy.
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