title: [Gene delivery system based on low molecular weight polyethylenimine and its transfection activity in the skin tissue].
abstract: Low molecular weight polyethylenimine (LMW-PEI) was linked to an expressing plasmid contains a green fluorescence protein (GFP) reporter gene and effective gene transfer was observed in CM7221 cell line tested. We examined the relationship among the molecular weight, structure of PEI and their transfection activity and cytotoxicity on CM7221 cell line. We also examined the position and continuance time of the GFP reporter gene expressed in the skin tissue of mouse. Results showed that LMW-PEI/DNA complexes led to high levels of expression in the CM7221 cell line (about 55%). However, with the increasing of PEI molecular weight, the transfection activity of PEI was decreasing. There was an increasing cytotoxicity with the larger PEI molecules. Further research showed that LMW-PEI induced a significant and long-lasting (7 days) expression of the GFP reporter gene in the hair vesicle, sweat, gland, sebaceous gland in the mouse skin tissues. The LMW-PEI described here is a new, highly efficient and non-cytotoxic vector. It would be a useful non-viral vector for gene delivery technology, particular useful as simple skin-specific vehicles of therapeutic genes.
authors.affiliation: Center of Basic Research, Shaanxi Chao Ying Biotechnology Limited Company, Xi'an 710061, China.
authors.forename: Yong Jun
authors.initials: YJ
authors.lastname: Liu
authors.forename: Ya Ping
authors.initials: YP
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Jing Fen
authors.initials: JF
authors.lastname: Jia
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
mesh_terms: D000818:Animals; D045744:Cell Line, Tumor; D004247:DNA / Q000235:genetics; D005786:Gene Expression Regulation / Q000187:drug effects; D017930:Genes, Reporter / Q000235:genetics*; D005822:Genetic Vectors / Q000235:genetics; D049452:Green Fluorescent Proteins / Q000096:biosynthesis* / Q000235:genetics; D006801:Humans; D008113:Liver Neoplasms / Q000378:metabolism / Q000473:pathology; D051379:Mice; D008970:Molecular Weight; D010957:Plasmids; D011094:Polyethyleneimine / Q000737:chemistry / Q000494:pharmacology / Q000633:toxicity; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000235:genetics; D012867:Skin / Q000378:metabolism*; D014162:Transfection / Q000379:methods*
chemical_list: D011994:Recombinant Proteins; D049452:Green Fluorescent Proteins; D011094:Polyethyleneimine; D004247:DNA