title: PLGA/mesoporous silica hybrid structure for controlled drug release.
abstract: In this paper, we report a poly(D,L-lactide-co-glycolide) (PLGA)/mesoporous silica hybrid structure (PS hybrid structure), which was synthesized via a novel sol-gel route assisted by single emulsion solvent evaporation. The in intro drug release properties of both the mesoporous silica and the PS hybrid structure were investigated. It was observed that gentamicin-loaded mesoporous silica showed a sharp initial burst during the first day followed by a rather constant and low release over the subsequent period of 3 weeks. In comparison with the mesoporous silica without biodegradable polymer encapsulation, the PS hybrid structure could realize a reduced initial burst, with a plateau stage for nearly 3 weeks of slow release, followed by a sustained release stage lasting for nearly 2 weeks. The whole release period could last as long as 5 weeks. These distinct behaviors make the hybrid structure material promising as a new drug release material for bone filling applications.
authors.affiliation: Department of Materials Science, National University of Singapore, 117543, Singapore. masxuejm@nus.edu.sg
authors.forename: J M
authors.initials: JM
authors.lastname: Xue
authors.forename: M
authors.initials: M
authors.lastname: Shi
mesh_terms: D001682:Biological Availability; D003692:Delayed-Action Preparations / Q000138:chemical synthesis / Q000737:chemistry* / Q000493:pharmacokinetics; D004337:Drug Carriers / Q000138:chemical synthesis / Q000737:chemistry / Q000493:pharmacokinetics; D005839:Gentamicins / Q000008:administration & dosage / Q000493:pharmacokinetics; D019344:Lactic Acid / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008859:Microscopy, Polarization; D008863:Microspheres; D008970:Molecular Weight; D010316:Particle Size; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D003692:Delayed-Action Preparations; D004337:Drug Carriers; D005839:Gentamicins; D011108:Polymers; D012821:Silanes; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid; C040733:tetraethoxysilane; D012822:Silicon Dioxide