title: Electrospun diclofenac sodium loaded Eudragit® L 100-55 nanofibers for colon-targeted drug delivery.
abstract: Eudragit® L 100-55 nanofibers loaded with diclofenac sodium (DS) were successfully prepared using an electrospinning process, and characterized for structural and pharmacodynamic properties. The influence of solvent and drug content on fiber formation and quality was also investigated. Fiber formation was successful using a solvent mixture 5:1 (v/v) ethanol:DMAc. XRD and DSC analysis of fibers confirm electron microscopic evidence that DS is evenly distributed in the nanofibers in an amorphous state. FTIR analysis indicates hydrogen bonding occurs between the drug and the polymer, which accounts for the molecular integration of the two components. In vitro dissolution tests verified that all the drug-loaded Eudragit® L 100-55 nanofibers had pH-dependent drug release profiles, with limited, less than 3%, release at pH 1.0, but a sustained and complete release at pH 6.8. This profile of properties indicates drug-loaded Eudragit® L 100-55 nanofibers have the potential to be developed as oral colon-targeted drug delivery systems.
authors.affiliation: College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China.
authors.forename: Xiaxia
authors.initials: X
authors.lastname: Shen
authors.forename: Dengguang
authors.initials: D
authors.lastname: Yu
authors.forename: Limin
authors.initials: L
authors.lastname: Zhu
authors.forename: Christopher
authors.initials: C
authors.lastname: Branford-White
authors.forename: Kenneth
authors.initials: K
authors.lastname: White
authors.forename: Nicholas P
authors.initials: NP
authors.lastname: Chatterton
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000284:Administration, Oral; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics; D002152:Calorimetry, Differential Scanning; D003106:Colon / Q000378:metabolism*; D004008:Diclofenac / Q000008:administration & dosage / Q000737:chemistry* / Q000493:pharmacokinetics; D004337:Drug Carriers / Q000737:chemistry*; D055664:Electrochemical Techniques; D006860:Hydrogen Bonding; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D057139:Nanofibers / Q000737:chemistry*; D010316:Particle Size; D012995:Solubility; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013678:Technology, Pharmaceutical / Q000379:methods*; D013817:Thermography
chemical_list: D000180:Acrylic Resins; D000894:Anti-Inflammatory Agents, Non-Steroidal; D004337:Drug Carriers; C446821:Eudragit L100-55; D012996:Solutions; D004008:Diclofenac