Journal
BIOMATERIALS
Volume 26, Issue 14, Pages 2157-2163Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biomaterials.2004.06.039
Keywords
magnesium phosphate; manganous phosphate; nanoparticles; non-viral vectors; gene delivery; transfection efficiency
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Nanoparticles of Mg and Mn (11) phosphates encapsulating pDNA were prepared. The sizes of these DNA loaded particles in aqueous dispersion were about 100-130nm diameter, and they aggregated with the progression of time. Although magnesium phosphate nanoparticles were crystalline, the manganous phosphate nanoparticles were found to be amorphous in nature. Nanoparticle dissolution and pDNA release were studied using atomic absorption spectroscopy and gel electrophoresis experiments. These inorganic phosphate nanoparticles dissolved in mild acidic pH (similar to5) releasing pDNA indicating that DNA release in the endosomal compartment is possible. In vitro transfection in HeLa cells demonstrated that while magnesium phosphate nanoparticles showed 100% efficiency, manganous phosphate nanoparticles exhibited about 85% transfection efficiency compared to that of 'polyfect', as control. (C) 2004 Elsevier Ltd. All rights reserved.
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