title: Silencing of exogenous DNA in cultured cells.
abstract: The intranuclear disposition of exogenous DNA is highly important for the therapeutic effects of the administrated DNA. Naked luciferase-plasmid DNA was transfected into cultured cells including HeLa by electroporation, and the amounts of intranuclear plasmid DNA and luciferase were quantitated at various time points. Decrease in expression efficiency from one copy of the exogenous DNA over time occurred as the case of mouse liver, and its degrees varied between cell lines. These results suggest that exogenous DNA is 'silenced' in the cultured cells as well as in mouse hepatocytes.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ochiai
authors.forename: Hideyoshi
authors.initials: H
authors.lastname: Harashima
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kamiya
mesh_terms: D000818:Animals; D019556:COS Cells; D002522:Chlorocebus aethiops; D004247:DNA / Q000008:administration & dosage* / Q000235:genetics*; D018274:Electroporation; D020868:Gene Silencing; D006367:HeLa Cells; D006801:Humans; D008156:Luciferases / Q000235:genetics / Q000378:metabolism; D051379:Mice; D041681:NIH 3T3 Cells; D010957:Plasmids; D014162:Transfection
chemical_list: D004247:DNA; D008156:Luciferases