Journal of Materials Science: Materials in Medicine: Insight into the role of N,N-dimethylaminoethyl methacrylate : cell viability and gene transfection studies

In the present study, the effect of N,N-dimethylaminoethyl methacrylate (DMAEMA) conjugation onto branched poly(ethylenimine) (PEI) with different grafting degree was examined for gene delivery applications. The DMAEMA-grafted-PEI conjugates were characterized and complexed with plasmid DNA (pDNA) a...

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Bibliographic Details
Published in:Cellular polymers 2013-03, Vol.32 (2), p.108
Main Authors: Nouri, Alireza, Castro, R, Kairys, Visvaldas, Santos, J.L, Rodrigues, J, Yulin, Li, Tomas, H
Format: Article
Language:English
Subjects:
Gene therapy
Properties
Schiff bases
Testing
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Summary:In the present study, the effect of N,N-dimethylaminoethyl methacrylate (DMAEMA) conjugation onto branched poly(ethylenimine) (PEI) with different grafting degree was examined for gene delivery applications. The DMAEMA-grafted-PEI conjugates were characterized and complexed with plasmid DNA (pDNA) at various concentrations, and the physicochemical properties, cell viability, and in vitro transfection efficiency of the complexes were evaluated in HEK 293T cells. Computational techniques were used to analyse the interaction energies and possible binding modes between DNA and conjugates at different grafting degrees. The cytotoxicity analysis and in vitro transfection efficiency of the conjugate/pDNA complexes exhibited a beneficial effect of DMAEMA conjugation when compared to PEI alone. The computational results revealed that the DNA/vector interaction energy decreases with increasing grafting degree, which can be associated to an enhanced release of the pDNA from the carrier once inside cells. The results indicate the significance of DMAEMA conjugation onto PEI as a promising approach for gene delivery applications. 47 Refs.
ISSN:0262-4893