title: Transfection of cells mediated by biodegradable polymer materials with surface-bound polyethyleneimine.
abstract: Poly(epsilon-CBZ-L-lysine) can be mixed with biodegradable polymers such as poly(D,L-lactic-co-glycolic acid) or poly(L-lactic acid) and formed into films, foams, or microspheres. Surface amino groups may then be deprotected with acid or lithium/liquid ammonia. The amino groups serve as a method to modify the surface by attachment of other molecules. In the present experiments, we show that these polymer materials, as films or foams, may be surface modified by the attachment of polyethyleneimine (PEI). Plasmid DNA attached to the PEI can transfect cells plated on the surface over several days. Covalent atachment of PEI was required for transfection to be efficient. PEI was also attached to surface-bound collagen on cell culture plates and was shown to mediate transfection.
authors.affiliation: Huffington Center on Aging and Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030, USA.
authors.forename: J
authors.initials: J
authors.lastname: Zheng
authors.forename: W S
authors.initials: WS
authors.lastname: Manuel
authors.forename: P J
authors.initials: PJ
authors.lastname: Hornsby
mesh_terms: D016475:3T3 Cells; D000818:Animals; D001672:Biocompatible Materials; D001673:Biodegradation, Environmental; D002460:Cell Line; D003094:Collagen / Q000737:chemistry; D046508:Culture Techniques / Q000379:methods; D049452:Green Fluorescent Proteins; D006801:Humans; D008164:Luminescent Proteins / Q000235:genetics; D008239:Lysine / Q000031:analogs & derivatives / Q000737:chemistry; D051379:Mice; D010957:Plasmids / Q000235:genetics; D011094:Polyethyleneimine; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes; D013499:Surface Properties; D014162:Transfection / Q000379:methods*
chemical_list: D001672:Biocompatible Materials; D008164:Luminescent Proteins; D011108:Polymers; D011137:Polystyrenes; C077785:N(epsilon)-carbobenzoxylysine; D049452:Green Fluorescent Proteins; D011094:Polyethyleneimine; D003094:Collagen; D008239:Lysine