Dynamic Interfaces between Cells and Surfaces: Electroactive Substrates that Sequentially Release and Attach Cells
作者:Woon-Seok Yeo、Muhammad N. Yousaf、Milan Mrksich
DOI:10.1021/ja038265b
日期:2003.12.1
An electroactivesubstrate that combines dual dynamic properties is demonstrated. A monolayer is patterned to first release an immobilizedligand, and therefore adherent cells, on application of an electrical potential. Subsequently, electrical oxidation of the substrate results in immobilization of ligands, and migration of adherent cells.
A substrate comprises a surface, and a plurality of moieties, on at least a portion of the surface. The moieties are moieties of formula:
Surf-L-Q-T,
where -T comprises a reactant ligand, and Surf- designates where the moiety attaches to the surface. The substrate can be made into a protein chip by the reaction of a reactant ligand and a fusion polypeptide, where the fusion polypeptide includes a capture polypeptide moiety which corresponds to the reactant ligand.
The present invention provides a method, comprising (a) providing a reactant ligand attached to a substrate; (b) contacting the substrate with a fusion polypeptide, said fusion polypeptide comprising a capture polypeptide fused to a display polypeptide under conditions such that said reactant ligand covalently binds to said capture polypeptide; and (c) analyzing said display polypeptide.