title: Modification of the release characteristics of estradiol encapsulated in PLGA particles via surface coating.
abstract: BACKGROUND
  Drug-loaded poly(lactide-co-glycolide) particles (100-4500 nm in diameter) were prepared via the electrospraying method. An extensive study was then carried out to determine the parameters affecting the release profile of estradiol (the drug or active pharmaceutical ingredient) in order to facilitate minimum initial burst release of estradiol.
  
  
  CONCLUSIONS
  The three most important factors affecting estradiol release were identified as: particle size, coating of the particles with chitosan/gelatin and the concentration of the coating agent. It was shown that coating the particles with chitosan significantly reduced the burst and initial release without affecting the subsequent release profile.
  
  
  CONCLUSIONS
  This work demonstrates a powerful method of generating drug-loaded polymeric particles with modified release behavior and control over the initial release phase. The surface-modified particles may be useful in controlled therapeutic delivery systems to minimize undesirable side effects.
authors: Department of Mechanical Engineering, University College London, Torrington Place, London WCIE 7JE, UK.
authors: Marjan
authors: M
authors: Enayati
authors: Eleanor
authors: E
authors: Stride
authors: Mohan
authors: M
authors: Edirisinghe
authors: William
authors: W
authors: Bonfield
mesh_terms: D002626:Chemistry, Pharmaceutical; D048271:Chitosan / Q000737:chemistry; D020099:Coated Materials, Biocompatible; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D004339:Drug Compounding; D004958:Estradiol / Q000737:chemistry*; D005780:Gelatin / Q000737:chemistry; D007700:Kinetics; D019344:Lactic Acid / Q000737:chemistry*; D053758:Nanoparticles; D010316:Particle Size; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D012995:Solubility; D013499:Surface Properties; D013678:Technology, Pharmaceutical / Q000379:methods
chemical_list: D020099:Coated Materials, Biocompatible; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; D004958:Estradiol; D005780:Gelatin; D048271:Chitosan