title: Chitosan microspheres of aceclofenac: in vitro and in vivo evaluation.
abstract: The objective of this investigation was to achieve controlled drug release of Aceclofenac (ACE) microspheres and to minimize local side-effects in the gastrointestinal tract (GIT). Sustained release chitosan microspheres containing ACE were prepared using double-emulsion solvent evaporation method (O/W/O). Chitosan microspheres were prepared by varying drug to polymer ratio (1:3, 1:4, 1:5 and 1:6). Microspheres were characterized for morphology, swelling behavior, mucoadhesive properties, FTIR and DSC study, drug loading efficiency, in vitro release, release kinetics, and in vivo study was performed on rat model. ACE-loaded microspheres were successfully prepared having production yield, 57-70% w/w. Drug encapsulation efficiency was ranging from 53-72% w/w, Scanning electron microscopy (SEM) revealed particle size of microspheres was between 39 and 55 mum. FTIR spectra and DSC thermograms demonstrated no interaction between drug and polymer. The in vitro release profiles of drug from chitosan microspheres showed sustained-release pattern of the drug in phosphate buffer, pH 6.8. In vitro release data showed correlation (r2 > 0.98), good fit with Higuchi/Korsmeyer-Peppas models, and exhibited Fickian diffusion. ACE microspheres demonstrated controlled delivery of aceclofenac and apparently, no G.I.T. erosion was noticed.
authors.affiliation: Indukaka Ipcowala College of Pharmacy, Vithal Udyognagar, New Vallabh Vidyanagar, Anand.
authors.forename: Chirag
authors.initials: C
authors.lastname: Nagda
authors.forename: Narendra
authors.initials: N
authors.lastname: Chotai
authors.forename: Sandip
authors.initials: S
authors.lastname: Patel
authors.forename: Dhruti
authors.initials: D
authors.lastname: Nagda
authors.forename: Upendra
authors.initials: U
authors.lastname: Patel
authors.forename: Tejal
authors.initials: T
authors.lastname: Soni
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D002626:Chemistry, Pharmaceutical; D048271:Chitosan; D003692:Delayed-Action Preparations; D004008:Diclofenac / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000737:chemistry; D004058:Diffusion; D004337:Drug Carriers; D016503:Drug Delivery Systems; D008297:Male; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D051381:Rats; D017208:Rats, Wistar; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D004008:Diclofenac; D048271:Chitosan; C056498:aceclofenac