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- W2039316428 abstract "We describe a novel approach to conjugate a targeting ligand to plasmid DNA without affecting either its supercoiled conformation or its ability to be efficiently transcribed. A 14-mer peptide nucleic acid (PNA) containing lysine and cysteine on each end was designed to target to a unique sequence located at the antibiotic resistance gene of the plasmid. The binding of PNA to the plasmid was found to be dose-dependent and sequence-specific and not to change the conformation of the plasmid. Transferrin (Tf) was conjugated with PNA via a reversible disulfide bond using N-succinimidyl-3-(2-pyridyldithio)propionate. Tf-PNA retained the ability to the plasmid in a sequence-specific manner. The efficiency of this bioconjugate for delivering plasmid was examined in cultured myoblasts and myotubes. Naked DNA and Tf-PNA/DNA showed no transfection activity in either myoblasts or myotubes. Polyethyleneimine (PEI) is required for significant increase of the transfection efficiency. At N:P ratio of 5, Tf-PNA enhanced gene transfection about fourfold over that of the DNA/PEI complex in both myoblasts and myotubes. This enhancement could be inhibited by excess free Tf, indicating that the enhancement of transfection was through Tf-mediated endocytosis. These findings suggest that this targeting system may have the potential for gene transfer to myogenic cells in vivo." @default.
- W2039316428 created "2016-06-24" @default.
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- W2039316428 date "2000-03-01" @default.
- W2039316428 modified "2023-10-06" @default.
- W2039316428 title "Targeted Delivery of Plasmid DNA to Myogenic Cells via Transferrin-Conjugated Peptide Nucleic Acid" @default.
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- W2039316428 doi "https://doi.org/10.1006/mthe.2000.0043" @default.
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