title: Stearyl poly(ethylene oxide) grafted surfaces for preferential adsorption of albumin.
abstract: An ideal surface for many biomedical applications would resist non-specific protein adsorption while at the same time triggering a specific biological pathway. Based on the approach of selectively binding albumin to free fatty acids, stearyl groups were immobilized onto poly(styrene) backbone via poly(ethylene oxide) side chains. X-ray photoelectron spectroscopy (XPS) analysis indicates substantial surface enrichment of the stearyl poly(ethylene oxide) (SPEO). In an aqueous environment, the surface rearrangement is limited, as proved by dynamic contact angle tests. The comb-like copolymer presents a special hydrophobic surface with high SPEO surface density, which may be due to the 'tail like' SPEO architecture at the copolymer/water interface. Protein adsorption tests confirm that the comb-like surfaces adsorb high levels of albumin and resist fibrinogen adsorption very significantly. The surfaces prepared in this research attract and reversibly bind albumin due to the synergistic action of the PEO chains and the stearyl end groups.
authors.affiliation: Department of Polymer Science, Zhejiang University, Hangzhou, China. jija_99@yahoo.com
authors.forename: J
authors.initials: J
authors.lastname: Ji
authors.forename: L
authors.initials: L
authors.lastname: Feng
authors.forename: M A
authors.initials: MA
authors.lastname: Barbosa
mesh_terms: D000327:Adsorption; D001672:Biocompatible Materials; D004577:Electron Probe Microanalysis; D005340:Fibrinogen / Q000493:pharmacokinetics; D006801:Humans; D066298:In Vitro Techniques; D008024:Ligands; D008422:Materials Testing; D011092:Polyethylene Glycols; D011137:Polystyrenes; D012709:Serum Albumin / Q000493:pharmacokinetics*; D013228:Stearates; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials; D008024:Ligands; D011137:Polystyrenes; D012709:Serum Albumin; D013228:Stearates; C103390:polyethylene glycol-polystyrene; C439572:stearyl poly(ethylene oxide); D011092:Polyethylene Glycols; D005340:Fibrinogen