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- W1973184210 abstract "Cationic peptides have been used successfully to transfer macromolecules into living cells. Previously, we have reported a short arginine peptide-based gene delivery system. However, the mechanisms that allow arginine peptides to promote gene delivery yet remain unknown. In the present study, we investigated the effect of the arginine peptide/DNA complex size on the transfection efficiency. After combining peptides with DNA, a 400 nm complex was observed. As the incubation time was increased, the complex grew larger, reaching 6 microm after 1 h of incubation. Transfection and cellular uptake efficiency were likewise investigated for the effects of the different sizes of complexes. Large complexes were found to be advantageous for transfection. However, better internalization efficiency was found with small complexes, indicating that the amount of peptide/DNA complexes taken up by cells is not the rate-limiting step in the final transfection efficiency. The intracellular path of the peptide/DNA complex was studied using fluorescent labeling and confocal microscopy. In the early stages of transfection, complexes were observed only on the cell surface, and these complexes migrated into cytoplasm however, after 6 h, the presence of complexes in the perinuclear region was noted. We were able to detect colocalization of green and red fluorescence in both the cytoplasm and the nucleus. These results suggest that peptide/DNA complexes reach the nucleus as associated complexes." @default.
- W1973184210 created "2016-06-24" @default.
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- W1973184210 date "2006-11-01" @default.
- W1973184210 modified "2023-10-14" @default.
- W1973184210 title "An insight into the gene delivery mechanism of the arginine peptide system: Role of the peptide/DNA complex size" @default.
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- W1973184210 doi "https://doi.org/10.1016/j.bbagen.2006.09.011" @default.
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