title: Functionalized hydrogel surfaces for the patterning of multiple biomolecules.
abstract: Patterning of multiple proteins and enzymes onto biocompatible surfaces can provide multiple signals to control cell attachment and growth. Acrylamide-based hydrogels were photo-polymerized in the presence of streptavidin-acrylamide, resulting in planar gel surfaces functionalized with the streptavidin protein. This surface was capable of binding biotin-labeled biomolecules. The proteins fibronectin and laminin, the enzyme alkaline phosphatase, and the photo-protein R-phycoerythrin were patterned using soft lithographic techniques. Polydimethylsiloxane stamps were used to transfer biotinylated proteins onto streptavidin-conjugated hydrogel surfaces. Stamped biomolecules were spatially resolved to feature sizes of 10 mum. Fluorescence measurements were used to assess protein transfer and enzyme functionality on modified surfaces. Our results demonstrate that hydrogel surfaces can be patterned with multiple proteins and enzymes, with retention of biological and catalytic activity. These surfaces are biocompatible and provide cues for cell attachment and growth. (c) 2006 Wiley Periodicals, Inc. J Biomed Mater Res 2007.
authors.affiliation: Laboratory of Nervous System Disorders, Wadsworth Center, PO Box 509, Empire State Plaza, Albany, New York 12201-0509, USA. mhynd@wadsworth.org
authors.forename: Matthew R
authors.initials: MR
authors.lastname: Hynd
authors.forename: John P
authors.initials: JP
authors.lastname: Frampton
authors.forename: Mary-Rose
authors.initials: MR
authors.lastname: Burnham
authors.forename: David L
authors.initials: DL
authors.lastname: Martin
authors.forename: Natalie M
authors.initials: NM
authors.lastname: Dowell-Mesfin
authors.forename: James N
authors.initials: JN
authors.lastname: Turner
authors.forename: William
authors.initials: W
authors.lastname: Shain
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D001710:Biotin / Q000737:chemistry; D002460:Cell Line; D004798:Enzymes / Q000737:chemistry; D006801:Humans; D020100:Hydrogels; D008422:Materials Testing; D011485:Protein Binding; D011506:Proteins / Q000737:chemistry*; D019809:Streptavidin / Q000737:chemistry; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials; D004798:Enzymes; D020100:Hydrogels; D011506:Proteins; D001710:Biotin; D019809:Streptavidin