title: MBG/PLGA composite microspheres with prolonged drug release.
abstract: Mesoporous bioactive glass (MBG) and composite microspheres with MBG particles embedded in biodegradable poly(D,L-lactide-co-glycolide) (PLGA) matrix have been prepared and used to load gentamicin (GS). The in vitro drug release experiments from both MBG and composite microspheres were conducted in distilled water and phosphate buffered saline (PBS) solution at 37 degrees C for more than 30 days. In both water and PBS, GS release from the MBG was very fast with about 60 wt % of the loaded drug released in the first 24 h, and more than 80 wt % released in two days. MBG/PLGA composite microspheres showed an initial release of about 33 wt % in the first day, and 48 wt % in 2 days, and a subsequent sustained release lasting for more than 4 weeks in PBS. MBG/PLGA composite microspheres may be used as an alternative drug release system, especially as a bone void filler for bone repair due to their combined advantages of sustained release of antibiotics and apatite-forming ability.
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People's Republic of China.
authors.forename: Xia
authors.initials: X
authors.lastname: Li
authors.forename: Xiupeng
authors.initials: X
authors.lastname: Wang
authors.forename: Lingxia
authors.initials: L
authors.lastname: Zhang
authors.forename: Hangrong
authors.initials: H
authors.lastname: Chen
authors.forename: Jianlin
authors.initials: J
authors.lastname: Shi
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000378:metabolism*; D001672:Biocompatible Materials / Q000737:chemistry / Q000378:metabolism; D004337:Drug Carriers / Q000737:chemistry*; D005839:Gentamicins / Q000737:chemistry / Q000378:metabolism*; D005898:Glass / Q000737:chemistry*; D006801:Humans; D019344:Lactic Acid / Q000737:chemistry*; D008422:Materials Testing; D008863:Microspheres; D010316:Particle Size; D011100:Polyglycolic Acid / Q000737:chemistry*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer
chemical_list: D000900:Anti-Bacterial Agents; D001672:Biocompatible Materials; D004337:Drug Carriers; D005839:Gentamicins; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid