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Cationic polybutyl cyanoacrylate nanoparticles for DNA delivery.

Duan J, Zhang Y, Chen W, Shen C, Liao M, Pan Y, Wang J, Deng X, Zhao J - J. Biomed. Biotechnol. (2009)

Bottom Line: Qualitative results showed highly efficient expression of GFP that remained stable for up to 96 hours.Quantitative results from FACS showed that PBCA-NPs were significantly more effective in transfecting HepG2 cells after 72 hours postincubation.The results of this study suggested that PBCA-NPs have favorable properties for nonviral delivery.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Nanobiological Technology, Ministry of Health National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha, Hunan 410008, China.

ABSTRACT
To enhance the intracellular delivery potential of plasmid DNA using nonviral vectors, we used polybutyl cyanoacrylate (PBCA) and chitosan to prepare PBCA nanoparticles (NPs) by emulsion polymerization and prepared NP/DNA complexes through the complex coacervation of nanoparticles with the DNA. The object of our work is to evaluate the characterization and transfection efficiency of PBCA-NPs. The NPs have a zeta potential of 25.53 mV at pH 7.4 and size about 200 nm. Electrophoretic analysis suggested that the NPs with positive charges could protect the DNA from nuclease degradation and cell viability assay showed that the NPs exhibit a low cytotoxicity to human hepatocellular carcinoma (HepG2) cells. Qualitative and quantitative analysis of transfection in HepG2 cells by the nanoparticles carrying plasmid DNA encoding for enhanced green fluorescent protein (EGFP-N1) was done by digital fluorescence imaging microscopy system and fluorescence-activated cell sorting (FACS). Qualitative results showed highly efficient expression of GFP that remained stable for up to 96 hours. Quantitative results from FACS showed that PBCA-NPs were significantly more effective in transfecting HepG2 cells after 72 hours postincubation. The results of this study suggested that PBCA-NPs have favorable properties for nonviral delivery.

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(a) Size distribution and (b) zeta potential of the prepared chitosan-coated PBCA-NPs.
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fig2: (a) Size distribution and (b) zeta potential of the prepared chitosan-coated PBCA-NPs.

Mentions: The sizedistribution and zeta potential of the NPs in NaCl solution were investigated by dynamic light scattering. Dynamic size distribution and zeta potential may play important roles indetermining the fate of NPs after administration [37]. Figure 2(a) shows a unimodalparticle size distribution (number average) between 100 and 200 nm. It was reported that largeparticles hardly reach the cells [38], while smaller particles tended toaccumulate in the tumor sites due to the enhanced permeability and retention (EPR)effect and a greater internalization was also observed [6]. Additionally, gene carrierswith a diameter larger than 200 nm are readily scavenged nonspecifically bymonocytes and the reticuloendothelial system [39].


Cationic polybutyl cyanoacrylate nanoparticles for DNA delivery.

Duan J, Zhang Y, Chen W, Shen C, Liao M, Pan Y, Wang J, Deng X, Zhao J - J. Biomed. Biotechnol. (2009)

(a) Size distribution and (b) zeta potential of the prepared chitosan-coated PBCA-NPs.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2655361&req=5

fig2: (a) Size distribution and (b) zeta potential of the prepared chitosan-coated PBCA-NPs.
Mentions: The sizedistribution and zeta potential of the NPs in NaCl solution were investigated by dynamic light scattering. Dynamic size distribution and zeta potential may play important roles indetermining the fate of NPs after administration [37]. Figure 2(a) shows a unimodalparticle size distribution (number average) between 100 and 200 nm. It was reported that largeparticles hardly reach the cells [38], while smaller particles tended toaccumulate in the tumor sites due to the enhanced permeability and retention (EPR)effect and a greater internalization was also observed [6]. Additionally, gene carrierswith a diameter larger than 200 nm are readily scavenged nonspecifically bymonocytes and the reticuloendothelial system [39].

Bottom Line: Qualitative results showed highly efficient expression of GFP that remained stable for up to 96 hours.Quantitative results from FACS showed that PBCA-NPs were significantly more effective in transfecting HepG2 cells after 72 hours postincubation.The results of this study suggested that PBCA-NPs have favorable properties for nonviral delivery.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Nanobiological Technology, Ministry of Health National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha, Hunan 410008, China.

ABSTRACT
To enhance the intracellular delivery potential of plasmid DNA using nonviral vectors, we used polybutyl cyanoacrylate (PBCA) and chitosan to prepare PBCA nanoparticles (NPs) by emulsion polymerization and prepared NP/DNA complexes through the complex coacervation of nanoparticles with the DNA. The object of our work is to evaluate the characterization and transfection efficiency of PBCA-NPs. The NPs have a zeta potential of 25.53 mV at pH 7.4 and size about 200 nm. Electrophoretic analysis suggested that the NPs with positive charges could protect the DNA from nuclease degradation and cell viability assay showed that the NPs exhibit a low cytotoxicity to human hepatocellular carcinoma (HepG2) cells. Qualitative and quantitative analysis of transfection in HepG2 cells by the nanoparticles carrying plasmid DNA encoding for enhanced green fluorescent protein (EGFP-N1) was done by digital fluorescence imaging microscopy system and fluorescence-activated cell sorting (FACS). Qualitative results showed highly efficient expression of GFP that remained stable for up to 96 hours. Quantitative results from FACS showed that PBCA-NPs were significantly more effective in transfecting HepG2 cells after 72 hours postincubation. The results of this study suggested that PBCA-NPs have favorable properties for nonviral delivery.

Show MeSH
Related in: MedlinePlus