title: Determining the protein drug release characteristics and cell adhesion to a PLLA or PLGA biodegradable polymer membrane.
abstract: Biodegradable polymers are of interest for developing controlled protein drug delivery platforms. In this study, two poly (alpha-hydroxy) esters were formulated with Aerosol-OT, a surfactant stabilizer, to encapsulate the protein keratinocyte growth factor (KGF) for controlled release KGF is involved in a number of crucial biologic processes, most notably epithelial growth and repair. The concentration of KGF that caused a biological response in vitro was determined (optimally 10 ng/mL) and compared with the release of KGF from the two biodegradable polymer membrane formulations. Each polymer formulation released biologically relevant levels, 10 ng/mL of active KGF, although with different times release kinetics. The membrane composed of PLGA/AOT/KGF exhibited a faster release rate of KGF into solution after 120 h of degradation time than the release rate of the PLLA/AOT/KGF matrices. Cell seeding assays showed that both polymer matrices, when formulated with AOT, sustained cell growth. Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS) was used to characterize the distribution of AOT and KGF through the polymer membrane. (c) 2010 Wiley Periodicals, Inc. J Biomed Mater Res, 2010.
authors.affiliation: Department of Chemistry, University at Buffalo, Buffalo, New York 14260, USA.
authors.forename: Sarah A
authors.initials: SA
authors.lastname: Burns
authors.forename: Robert
authors.initials: R
authors.lastname: Hard
authors.forename: Wesley L
authors.initials: WL
authors.lastname: Hicks
authors.forename: Frank V
authors.initials: FV
authors.lastname: Bright
authors.forename: David
authors.initials: D
authors.lastname: Cohan
authors.forename: Lynn
authors.initials: L
authors.lastname: Sigurdson
authors.forename: Joseph A
authors.initials: JA
authors.lastname: Gardella
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry / Q000378:metabolism*; D002448:Cell Adhesion / Q000502:physiology*; D002460:Cell Line; D004337:Drug Carriers / Q000737:chemistry / Q000378:metabolism*; D016503:Drug Delivery Systems; D051523:Fibroblast Growth Factor 7 / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D019344:Lactic Acid / Q000737:chemistry / Q000378:metabolism*; D008422:Materials Testing; D011091:Polyesters; D011100:Polyglycolic Acid / Q000737:chemistry / Q000378:metabolism*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000737:chemistry / Q000378:metabolism*
chemical_list: D001672:Biocompatible Materials; D004337:Drug Carriers; D011091:Polyesters; D011108:Polymers; D051523:Fibroblast Growth Factor 7; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; C033616:poly(lactide)