Asymmetrical lysine dendrimers are promising as vectors for delivering gene expression constructs into mammalian cells. The condensing, protective, and transfection properties were studied for pentaspherical lysine dendrimer D5 and its analog D5C10, modified with capric acid residues at the outer sphere; in addition, the transfection activity was assayed for complexes DNA-dendrimer-endosomolytic peptide JTS-1. Fatty acid residues incorporated in lysine dendrimers proved to improve their ability to bind DNA, to protect DNA from nuclease degradation, and to ensure its transfer into the nucleus. Peptide JTS-1 introduced in DNA-dendrimer complexes significantly increased their transfection activity. The potentiating effect of JTS-1 was especially high with the DNA-D5C10 complex. An excess of JTS-1 changed the structure of the complexes and reduced their transfection activity. It was assumed that dendrimers D5 and D5C10 are promising vectors for DNA delivery to eukaryotic cells and provide a basis for constructing more refined nonviral module carriers.
Russian Journal of Genetics – Springer Journals
Published: Jun 28, 2007
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