Hydroxyapatite/Chondoroitin Sulfate Microparticles as Time-Controlled Release Carrier of Proteins

摘要

Time-controlled releases of proteins from hydroxyapatite/chondroitin sulfate (HAp/ChS) spherical microparticles were achieved by the addition of zinc cation into the mixture solutions of HAp/ChS and protein as a novel formulation. The initial bursts of proteins, such as cytochrome c and bovine serum albumin, were apparently suppressed by the amount of zinc cation, which could be attributed to the formation of coordinate bonds of zinc cation among proteins and/or ChS moleculars. The increase of molecular lengths of ChS chains decreased the adsorbed amount of proteins, which did not apparently affected to the release of proteins.