Competitive protein adsorption to polymer surfaces from human serum.
Surface modification by "soft" plasma polymerisation to obtain a hydrophilic and non-fouling polymer surface has been validated using radioactive labelling. Adsorption to unmodified and modified polymer surfaces, from both single protein and human serum solutions, has been investigated. By using different radioisotopes, albumin and Immunoglobulin G (IgG) adsorption has been monitored simultaneously during competitive adsorption processes, which to our knowledge has not been reported in the literature before. Results show that albumin and IgG adsorption is dependent on adsorption time and on the presence and concentration of other proteins in bulk solutions during adsorption. Generally, lower albumin and IgG adsorption was observed on the modified and more hydrophilic polymer surfaces, but otherwise the modified and unmodified polymer surfaces showed the same adsorption characteristics.
Polymer Department, Risø National Laboratory, Technical University of Denmark, Building 124, P.O. Box 49, 4000, Roskilde, Denmark. maria.holmberg@risoe.dk
Maria
M
Holmberg
Karin B
KB
Stibius
Niels B
NB
Larsen
Xiaolin
X
Hou
D000327:Adsorption; D000418:Albumins / Q000737:chemistry; D001672:Biocompatible Materials / Q000737:chemistry; D001703:Biophysics / Q000379:methods; D004987:Ethers / Q000737:chemistry; D005026:Ethylene Glycols / Q000737:chemistry; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood* / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D011485:Protein Binding; D011487:Protein Conformation; D011506:Proteins / Q000737:chemistry*; D044967:Serum / Q000737:chemistry; D013499:Surface Properties; D013997:Time Factors; D014753:Vinyl Compounds / Q000737:chemistry
D000418:Albumins; D001672:Biocompatible Materials; D004987:Ethers; D005026:Ethylene Glycols; D007074:Immunoglobulin G; D011108:Polymers; D011506:Proteins; D014753:Vinyl Compounds; C529627:diethylene glycol vinyl ether; C013484:diethylene glycol