title: Artery wall binding peptide-poly(ethylene glycol)-grafted-poly(L-lysine)-based gene delivery to artery wall cells.
abstract: Artery wall binding peptide (AWBP; Cys-Gly-Arg-Ala-Leu-Val-Asp-Thr-Leu-Lys-Phe-Val-Thr-Gln-Ala-Glu-Gly-Ala-Lys), a specific targeting peptide, was conjugated to poly(ethylene glycol)-grafted-poly(L-lysine) (PEG-g-PLL) to enhance the gene transfer to artery wall cells. AWBP-PEG-PLL was synthesized by the reaction between the vinylsulfone group of PEG-g-PLL and the thiol group of cysteine in AWBP. 1H-NMR analysis confirmed the composition of the obtained polymer and indicated that four mol of AWBP were reacted to one mole of VS-PEG-PLL. The particles of AWBP-PEG-PLL/pDNA complexes were determined spherical with a size of approximately 100 nm by dynamic light scattering (DLS) and atomic force microscopy (AFM). Agarose gel retardation assay indicated that AWBP-PEG-PLL was able to condense plasmid DNA and reach complete complexation at and above a charge ratio 1/1 (+/-). Transfection efficiency of AWBP-PEG-PLL/pDNA complexes was 150-180 times higher than that of control systems, such as PEG-g-PLL/pDNA and PLL/pDNA, in both bovine aorta endothelial cells and smooth muscle cells. Luciferase activities of AWBP-PEG-PLL depended on the amount of free AWBP, while those of the control carriers such as PLL and PEG-g-PLL were not affected by free AWBP. These results supported that gene transfer of AWBP-PEG-PLL/pDNA complexes to bovine aorta wall cells was mediated by specific artery wall cell receptor-mediated endocytosis.
authors.affiliation: Department of Polymer Science and Engineering, Sunchon National University, 540-742, Chonnam, Republic of Korea.
authors.forename: Jae-Woon
authors.initials: JW
authors.lastname: Nah
authors.forename: Lei
authors.initials: L
authors.lastname: Yu
authors.forename: Sang-oh
authors.initials: SO
authors.lastname: Han
authors.forename: Cheol-Hee
authors.initials: CH
authors.lastname: Ahn
authors.forename: Sung Wan
authors.initials: SW
authors.lastname: Kim
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001158:Arteries / Q000378:metabolism*; D001161:Arteriosclerosis / Q000188:drug therapy; D002352:Carrier Proteins / Q000737:chemistry*; D002417:Cattle; D018014:Gene Transfer Techniques; D015316:Genetic Therapy; D008969:Molecular Sequence Data; D010316:Particle Size; D011092:Polyethylene Glycols / Q000737:chemistry*; D011107:Polylysine / Q000737:chemistry*
chemical_list: D002352:Carrier Proteins; D011107:Polylysine; D011092:Polyethylene Glycols