title: A novel biodegradable system based on gelatin nanoparticles and poly(lactic-co-glycolic acid) microspheres for protein and peptide drug delivery.
abstract: Gelatin nanoparticle-poly(lactic-co-glycolic acid) (PLGA) microsphere composites were prepared by encapsulating protein-loaded gelatin nanoparticles in PLGA microspheres. This encapsulation was conducted by using a phase separation method and a solvent extraction method. The average diameter of the gelatin nanoparticle-PLGA microsphere composites is between 160 and 175 microm. Protein loading efficiency is 93.2% for the nanoparticle-microsphere composite prepared by the phase separation method, while it is 31.31% for the composite prepared by the solvent extraction method. Protein release experiments indicate that this new composite system possesses sustained release characteristics. This system also demonstrates the capability of preventing the denaturation of protein drugs.
authors.affiliation: Division of Pharmaceutics and Industrial Pharmacy, Arnold & Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, NY 11201, USA.
authors.forename: J K
authors.initials: JK
authors.lastname: Li
authors.forename: N
authors.initials: N
authors.lastname: Wang
authors.forename: X S
authors.initials: XS
authors.lastname: Wu
mesh_terms: D001711:Biotransformation; D004337:Drug Carriers; D019075:Electrophoresis, Capillary; D005780:Gelatin / Q000737:chemistry*; D019344:Lactic Acid / Q000737:chemistry*; D008863:Microspheres; D010316:Particle Size; D010455:Peptides / Q000008:administration & dosage* / Q000737:chemistry; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000737:chemistry*; D011489:Protein Denaturation; D012710:Serum Albumin, Bovine / Q000008:administration & dosage* / Q000737:chemistry
chemical_list: D004337:Drug Carriers; D010455:Peptides; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D012710:Serum Albumin, Bovine; D019344:Lactic Acid; D005780:Gelatin