title: Preparation and characterization of molecularly imprinted poly(hydroxyethyl methacrylate) microspheres for sustained release of gatifloxacin.
abstract: Molecularly imprinted poly(hydroxyethyl methacrylate) microspheres (PHEMA MIPMs) were prepared via precipitation polymerization in this article, using gatifloxacin (GFLX), hydroxyethyl methacrylate (HEMA), and ethylene glycol dimethacrylate (EGDMA) as template molecule, functional monomer and cross-linker, respectively. The effects of reaction medium, initial total monomers, cross-linker and molecular imprinting on the polymerization were investigated systematically. The interaction between GFLX and HEMA in pre-solution was studied by UV-Visible spectrophotometer, both size and morphology of products were characterized by a scanning electron microscope. When the total initial monomer concentration was 1 vol%, EGDMA content was 70 mol%, a group of uniform PHEMA MIPMs were prepared at different GFLX/MAA molar ratios, with diameter range from 2.06 ± 0.07 to 2.82 ± 0.20 μm. The results of drug loading and in vitro release experiments demonstrated that PHEMA MIPMs could achieve a higher GFLX loading content and a more acceptable sustained release than non-imprinted ones.
authors.affiliation: Institute of Biomedical Engineering, Jinan University, Guangzhou, 510632, People's Republic of China.
authors.forename: Xue-Fei
authors.initials: XF
authors.lastname: Lu
authors.forename: Yun-feng
authors.initials: YF
authors.lastname: Shi
authors.forename: Hong-Ling
authors.initials: HL
authors.lastname: Lv
authors.forename: Ye-Yun
authors.initials: YY
authors.lastname: Fu
authors.forename: Dong
authors.initials: D
authors.lastname: Ma
authors.forename: Wei
authors.initials: W
authors.lastname: Xue
mesh_terms: D000179:Acrylates / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000138:chemical synthesis; D002214:Capsules / Q000008:administration & dosage / Q000138:chemical synthesis*; D003692:Delayed-Action Preparations / Q000008:administration & dosage* / Q000138:chemical synthesis*; D004058:Diffusion; D024841:Fluoroquinolones / Q000008:administration & dosage* / Q000737:chemistry*; D000077734:Gatifloxacin; D008422:Materials Testing; D054802:Molecular Imprinting / Q000379:methods*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000179:Acrylates; D000900:Anti-Bacterial Agents; D002214:Capsules; D003692:Delayed-Action Preparations; D024841:Fluoroquinolones; D011108:Polymers; C487693:poly(hydroxylethyl acrylate); D000077734:Gatifloxacin