title: Effect of additives on the release of a model protein from PLGA microspheres.
abstract: The purpose of this study was to investigate the effect of 2 additives, poly(ethylene glycol) (PEG) 1000 and 1,2,3-tridecanoyl glycerol (tricaprin), on the physico-chemical characteristics and in vitro release of a model protein, bovine serum albumin (BSA), form poly(D,L-lactic-co-glycolic acid) (PLGA) microspheres. BSA-loaded microspheres were prepared by the double emulsion solvent evaporation method. Additives were incorporated into microspheres to modify the release of protein. The addition of PEG 1000 and tricaprin changed the surface characteristics of microspheres from smooth and nonporous to porous and dimpled, respectively. The in vitro release profiles showed that the additives significantly (P < 0.05) increased the early-stage release of BSA from microspheres.
authors.affiliation: Department of Pharmaceutical Sciences, College of Pharmacy, North Dakota State University, Fargo, ND 58105, USA.
authors.forename: F
authors.initials: F
authors.lastname: Kang
authors.forename: J
authors.initials: J
authors.lastname: Singh
mesh_terms: D003692:Delayed-Action Preparations; D004337:Drug Carriers; D019344:Lactic Acid / Q000737:chemistry*; D008863:Microspheres; D010316:Particle Size; D011092:Polyethylene Glycols / Q000494:pharmacology*; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000737:chemistry*; D012710:Serum Albumin, Bovine / Q000008:administration & dosage*; D014280:Triglycerides / Q000494:pharmacology*
chemical_list: D003692:Delayed-Action Preparations; D004337:Drug Carriers; D011108:Polymers; D014280:Triglycerides; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D012710:Serum Albumin, Bovine; D019344:Lactic Acid; D011092:Polyethylene Glycols; C010800:tricaprin