title: Protein adsorption resistance and oxygen permeability of chemically crosslinked phospholipid polymer hydrogel for ophthalmologic biomaterials.
abstract: The biomimetic structure of a polymer hydrogel bearing phosphorylcholine groups was obtained from 2-methacryloyloxyethylphosphorylcholline (MPC) and a novel crosslinker, 2-(methacryloyloxy)ethyl-N-(2-methacryloyloxy)ethyl]phosphorylcholine (MMPC), to prepare biocompatible ocular materials. MMPC is a dimethacrylate with phosphorylcholine-analogous linkage. Previous reports clarified that the affinity of MMPC to MPC enables the water contents and mechanical properties of the poly(MPC) hydrogels to be varied without disturbing the bulk phases. In this study, we examined the protein adsorption resistance, water wettability, oxygen permeability, and electrolyte permeability of the mechanically enhanced poly(MPC) hydrogel crosslinked with MMPC. The amount of protein adsorbed on this hydrogel was 0.9 microg/cm(2), which accounted for 30% of Omafilcon A and 3% of Etafilcon A. Water contact angle experiments revealed the high wettability of the poly(MPC) hydrogels. The oxygen permeability and NaCl diffusion constant of the poly(MPC) hydrogels were 64 barrer and 48 x 10(-6) cm(2)/s, respectively. This high permeability resulted from the high water content, similar to the case of the human cornea. These results suggested that poly(MPC) hydrogels have good potential for use in ophthalmologic biomaterials.
authors.affiliation: Department of Materials Engineering, School of Engineering, The University of Tokyo, Tokyo, Japan.
authors.forename: Tatsuro
authors.initials: T
authors.lastname: Goda
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Matsuno
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Konno
authors.forename: Madoka
authors.initials: M
authors.lastname: Takai
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Ishihara
mesh_terms: D000327:Adsorption; D001672:Biocompatible Materials / Q000737:chemistry*; D003263:Contact Lenses, Hydrophilic; D003432:Cross-Linking Reagents / Q000737:chemistry; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D008422:Materials Testing; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry*; D010539:Permeability; D010743:Phospholipids / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011506:Proteins / Q000737:chemistry*; D017155:Wettability
chemical_list: D001672:Biocompatible Materials; D003432:Cross-Linking Reagents; D010743:Phospholipids; D011108:Polymers; D011506:Proteins; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D010100:Oxygen