title: Hydrogels based on poly(ethylene oxide) and poly(tetramethylene oxide) or poly(dimethyl siloxane): synthesis, characterization, in vitro protein adsorption and platelet adhesion.
abstract: In vitro protein adsorption, platelet adhesion and activation on new hydrogel surfaces, composed of poly(ethylene oxide) (PEO) and poly(tetramethylene oxide) (PTMO) or poly(dimethyl siloxane) (PDMS), were investigated. By varying PEO length (MW = 2000 or 3400), hydrophobic components (PTMO or PDMS) or polymer topology (block or graft copolymers), various physical hydrogels were produced. Their structures were verified by 1H NMR and ATR-IR and the molecular weights were determined by gel permeation chromatography. The hydrogels were soluble in a variety of organic solvents, while absorbed a significant amount of water with preserved three-dimensional structure by physical crosslinking. The dynamic contact angle measurement revealed that the surface hydrophilicity increased by incorporating longer PEO, PEO grafting, and adopting PDMS as a hydrophobic segment instead of PTMO. It was observed from in vitro protein adsorption study that the hydrogels exhibited significantly lower adsorption of human serum albumin (HSA), human fibrinogen (HFg), and IgG, when compared with Pellethane, a commercial polyurethane taken as a control. The hydrogels were attractive for HSA but not sensitive to HFg and IgG. And more than 65% of the proteins detected on the surfaces of the hydrogels were reversibly detached by being treated with an SDS solution. It was evident that the hydrogels synthesized in this study were much more resistant to platelet adhesion than the control, which might depend on the composition of proteins adsorbed on the surfaces and their degree of denaturation. Among the hydrogels tested, PEO3,4kPDMS exhibited albumin-rich and platelet-resistant surfaces, implying a potential candidate for biomaterial.
authors.affiliation: Center for Biomaterials and Biotechnology, Department of Materials Science and Engineering, Kwangju Institute of Science and Technology, Puk-gu, South Korea.
authors.forename: Jae Hyung
authors.initials: JH
authors.lastname: Park
authors.forename: You Han
authors.initials: YH
authors.lastname: Bae
mesh_terms: D000327:Adsorption; D001792:Blood Platelets / Q000166:cytology / Q000378:metabolism; D002448:Cell Adhesion; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D005340:Fibrinogen / Q000378:metabolism; D006018:Glycols / Q000737:chemistry*; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D007074:Immunoglobulin G / Q000378:metabolism; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D011092:Polyethylene Glycols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012709:Serum Albumin / Q000378:metabolism; D012828:Silicones / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D020099:Coated Materials, Biocompatible; D004129:Dimethylpolysiloxanes; D006018:Glycols; D007074:Immunoglobulin G; D011108:Polymers; D012709:Serum Albumin; D012828:Silicones; D012997:Solvents; D013501:Surface-Active Agents; C047554:polytetramethylene glycol; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D011092:Polyethylene Glycols; C013830:baysilon; D005340:Fibrinogen; C028210:monomethoxypolyethylene glycol