title: Interaction of microbial DNA with cultured mammalian cells. Binding of the donor DNA to the cell surface.
abstract: Cultured fibroblasts grown in monolayer were incubated for a short time with radioactively labeled microbial DNA and diethylaminoethyl-dextran (DEAE-dextran), poly-L-lysine, or calcium phosphate, agents previously demonstrated by others to markedly enhance transfection. Immediately after such treatment of 1 by 10(-6)-1.5 by 10(6) cells with DNA, approx. 0.05-0.15 mug of donor DNA representing 10-30% of the input DNA became cell associated. In contrast, when the cells are similarly treated with only a DNA solution approx. 0.5-5% of the donor DNA was retained by the cells. More than 95% of the cell-associated donor DNA was shown to be bound to the surface of cells treated with polycation. It was also shown that in the absence of polycation treatment, most of the cell-associated donor DNA was bound to the cell surface.
mesh_terms: D000818:Animals; D001665:Binding Sites; D002460:Cell Line; D002462:Cell Membrane / Q000378:metabolism*; D002478:Cells, Cultured; D003090:Coliphages; D003637:DEAE-Dextran / Q000494:pharmacology; D004269:DNA, Bacterial / Q000378:metabolism*; D004279:DNA, Viral / Q000378:metabolism*; D004926:Escherichia coli; D005347:Fibroblasts / Q000378:metabolism; D006801:Humans; D008297:Male; D051379:Mice; D011107:Polylysine / Q000494:pharmacology; D012867:Skin / Q000378:metabolism; D014974:Xanthomonas
chemical_list: D004269:DNA, Bacterial; D004279:DNA, Viral; D011107:Polylysine; D003637:DEAE-Dextran