Comparative study of poly (lactic-co-glycolic acid)-poly ethyleneimine-plasmid DNA microparticles prepared using double emulsion methods

Journal of Microencapsulation
Xue-Qing ZhangAliasger K Salem

Abstract

Controlled release of plasmid DNA (pDNA) from biodegradable poly lactic-co-glycolic acid (PLGA) microparticles has the potential to enhance transgene expression. However, barriers to this approach include limited encapsulation efficiency, pDNA damage during fabrication and confinement of the microparticles inside phagolysosomal compartments. Combining PLGA with poly ethyleneimine (PEI) can improve protection of pDNA during fabrication, increase encapsulation efficiencies and impart the PLGA microparticles with the capacity to escape the phagolysosomal compartments. This study compares three promising formulation methods for preparing PLGA PEI pDNA microparticles and evaluates for buffering capacity, cellular uptake, transfection efficiency and toxicity. In the first method, PLGA PEI pDNA microparticles are prepared by entrapping pDNA in blended PLGA/PEI using the double emulsion water-in-oil-in-water solvent evaporation technique (PA). In a second approach, PEI-pDNA polyplexes are prepared and then entrapped in PLGA microparticles using a double emulsion solvent evaporation method (PB). Microparticles prepared using formulation methods PA and PB are then compared against PLGA microparticles with PEI conjugated to the surface us...Continue Reading

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Citations

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