title: DNA transfection screening from single beads.
abstract: The solid-phase synthesis of a library of arginine-containing lipid transfection agents on high-loading beads is described. The transfection activity of the cationic lipids was determined using compound cleaved from single beads (single-bead screening) and showed, in some cases, comparable or higher DNA transfection activities as compared to commercially available reagents. Lipids with one arginine headgroup and a cholesterol tail were found to be the most active, even though their DNA binding strength (retardation assays) was relatively weak. Single-bead screening of transfection activity facilitates the rapid analysis of libraries of transfection reagents and will allow the rapid optimization of gene delivery into cells, both in culture and in vivo.
authors.affiliation: Department of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K.
authors.forename: Boon-Ek
authors.initials: BE
authors.lastname: Yingyongnarongkul
authors.forename: Mark
authors.initials: M
authors.lastname: Howarth
authors.forename: Tim
authors.initials: T
authors.lastname: Elliott
authors.forename: Mark
authors.initials: M
authors.lastname: Bradley
mesh_terms: D001120:Arginine; D002412:Cations; D002460:Cell Line; D002470:Cell Survival; D020650:Combinatorial Chemistry Techniques; D019791:Guanidine; D006801:Humans; D008055:Lipids / Q000138:chemical synthesis* / Q000633:toxicity; D008863:Microspheres; D014162:Transfection / Q000379:methods* / Q000592:standards
chemical_list: D002412:Cations; D008055:Lipids; D001120:Arginine; D019791:Guanidine