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- W1967644328 abstract "Herein, we report on the relative in vitro efficacies of nine novel non-glycerol based cationic amphiphiles with increasing hydrophobic tails and the amino acids serine, alanine and beta-alanine as the headgroup functionalities (lipids 1-9, Scheme 1) in transfecting multiple cultured cells including CHO, COS-1, MCF-7, and HepG2. The gene transfer efficiencies of lipids 1-9 were evaluated using the reporter gene assays in all the four cell lines and the whole cell histochemical X-gal staining assays in representative CHO cells. In CHO, HepG2, and MCF-7 cells, cationic lipids with alanine (4-6) and beta-alanine (7-9) headgroups were found to be remarkably more transfection efficient than their serine headgroup counterparts (1-3). Most notably, in CHO, HepG2, and MCF-7 cells, in combination with cholesterol as auxiliary lipid, the transfection efficiencies of the cationic lipids with alanine and beta-alanine headgroups and myristyl and palmityl tails (lipids 4, 5, 7 and 8) were significantly higher (2-3-fold) than that of LipofectAmine-2000, a widely used commercially available liposomal tranfection vectors. Surprisingly, in COS-1 cells, although cationic lipids with beta-alanine headgroups (7-9) were strikingly transfection efficient (3-4-fold more efficacious than LipofectAmine-2000), the gene transfer properties of both their structural isomers (4-6) and their serine headgroup counterparts (1-3) were adversely affected. In summary, the present structure-activity investigation demonstrate that high gene delivery efficacies of cationic amphiphiles containing alanine or beta-alanine headgroups can get seriously compromised by substituting the alanine or beta-alanine with serine presumably due to the enhanced sensitivity of DNA associated with such serine-head-containing cationic lipids." @default.
- W1967644328 created "2016-06-24" @default.
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- W1967644328 date "2005-07-01" @default.
- W1967644328 modified "2023-10-17" @default.
- W1967644328 title "Gene Transfer Efficacies of Novel Cationic Amphiphiles with Alanine, β-Alanine, and Serine Headgroups: A Structure−Activity Investigation" @default.
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- W1967644328 doi "https://doi.org/10.1021/bc0500443" @default.
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