title: Controlled release from coated polymer microparticles embedded in tissue-engineered scaffolds.
abstract: The controlled release of proteins in tissue-engineered implants is being examined with the potential application to improve vascularization and hasten tissue growth. Bovine serum albumin (BSA), was encapsulated within poly(D,L-lactic-co-glycolic acid) [PLGA] microparticles. The microparticles were coated with poly(vinyl alcohol) and incorporated into PLGA tissue-engineered scaffolds during fabrication. The release of BSA from PLGA microparticles, coated PLGA microparticles, and microparticles embedded in a porous PLGA scaffold was measured. We have developed a novel approach that will permit incorporation of coated polymeric microparticles during PLGA scaffold fabrication. Growth factors or drugs could be incorporated into the microparticles resulting in a long-term, controlled release.
authors.affiliation: Bone Tissue-Engineering Center, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Hu
authors.forename: J O
authors.initials: JO
authors.lastname: Hollinger
authors.forename: K G
authors.initials: KG
authors.lastname: Marra
mesh_terms: D000818:Animals; D002417:Cattle; D020099:Coated Materials, Biocompatible / Q000008:administration & dosage; D003692:Delayed-Action Preparations / Q000008:administration & dosage / Q000493:pharmacokinetics*; D004337:Drug Carriers / Q000008:administration & dosage; D016503:Drug Delivery Systems / Q000379:methods*; D016650:Fluorescein-5-isothiocyanate / Q000008:administration & dosage / Q000031:analogs & derivatives / Q000493:pharmacokinetics; D019344:Lactic Acid / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D010316:Particle Size; D011100:Polyglycolic Acid / Q000737:chemistry; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000737:chemistry; D012710:Serum Albumin, Bovine / Q000008:administration & dosage / Q000493:pharmacokinetics; D023822:Tissue Engineering
chemical_list: D020099:Coated Materials, Biocompatible; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D011108:Polymers; C039217:fluorescein isothiocyanate bovine serum albumin; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D012710:Serum Albumin, Bovine; D019344:Lactic Acid; D016650:Fluorescein-5-isothiocyanate