title: Release of ciprofloxacin from poloxamer-graft-hyaluronic acid hydrogels in vitro.
abstract: Recently, in situ gel formation has extensively been studied to enhance ocular bioavailability and duration of the drug activity. In this study, we report grafting of poloxamer onto the hyaluronic acid for application of tissue engineering oriented ophthalmic drug delivery system. Graft copolymers were prepared by coupling mono amine-terminated poloxamer (MATP) with hyaluronic acid (HA) backbone using 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) and N-hydroxylsuccinimide (NHS) as coupling agents. The coupling of MATP with HA was clarified by 1H NMR and FT-IR spectroscopy. The gelation temperature of graft copolymers was dependent on the content of HA and the concentration of poloxamer. From drug release studies in vitro, ciprofloxacin was sustainedly released from the poloxamer-g-hyaluronic acid hydrogel due to the in situ gel formation of the copolymer and viscous properties of HA.
authors.affiliation: School of Biological Resources and Materials Engineering, Seoul National University, Suwon 441-744, South Korea.
authors.forename: K Y
authors.initials: KY
authors.lastname: Cho
authors.forename: T W
authors.initials: TW
authors.lastname: Chung
authors.forename: B C
authors.initials: BC
authors.lastname: Kim
authors.forename: M K
authors.initials: MK
authors.lastname: Kim
authors.forename: J H
authors.initials: JH
authors.lastname: Lee
authors.forename: W R
authors.initials: WR
authors.lastname: Wee
authors.forename: C S
authors.initials: CS
authors.lastname: Cho
mesh_terms: D002939:Ciprofloxacin / Q000008:administration & dosage / Q000737:chemistry*; D016503:Drug Delivery Systems; D006820:Hyaluronic Acid / Q000737:chemistry*; D020100:Hydrogels; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D020442:Poloxamer / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D020100:Hydrogels; D020442:Poloxamer; D002939:Ciprofloxacin; D006820:Hyaluronic Acid