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Preparation of Dexamethasone-Based Cationic Liposome and Its Application to Gene Delivery In Vitro

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In this study, dexamethasone was conjugated to PAMAM dendrimer (generation 0) and its gene transfection efficiency was investigated. To make a liposomal solution for gene delivery, DOPE was used as a fusogenic helper lipid. In gel retardation assay, PAMAM-dexamethasone conjugate (PAM-Dex)/DOPE liposome/DNA complex was completely retarded at 8:1 N/P (nitrogen/phosphate) ratio. The physicochemical characteristics are studied by measuring the average size distribution and ζ-potential values of the complexes. In vitro transfection assay showed that the PAM-Dex/DOPE liposome/DNA complex displayed higher gene delivery efficiency compared to PAMAM/DNA complex. In addition, PAM-Dex/DOPE liposome showed the lowest toxicity compared to PAMAM, PEI 25 kD and Lipofectamine. These results indicate that PAM-Dex/DOPE liposome has a potential to be used as an efficient gene carrier for gene therapy.
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Keywords: CATIONIC LIPOSOME; DENDRIMER; DEXAMETHASONE; GENE TRANSFECTION

Document Type: Research Article

Publication date: February 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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