期刊
CARBOHYDRATE POLYMERS
卷 81, 期 2, 页码 372-376出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2010.02.034
关键词
Chitosan; Dextran sulfate; Targeted drug delivery; Hydrogels, Iron oxide nanoparticles
The purpose of this study was to examine chitosan (CS)-dextran sulfate (DS) nanoparticles coated iron oxide as drug carriers detectable using magnetic resonance imaging (MRI) technique. The 5-aminosalicylic acid (5-ASA) was chosen as model drug molecule. CS-DS hydrogels were formulated by a complex coacervation process under mild conditions. The influence of process variables, including the two ionic polymers, on particle size, and hydrogel entrapment of 5-ASA was studied. The in vitro release of 5-ASA were also evaluated, and the integrity of 5-ASA in the release fraction was assessed using sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The release of 5-ASA from hydrogel was based on the ion-exchange mechanism. The CS-DS hydrogel developed based on the modulation of ratio show promise as a system for controlled delivery of drug detectable using magnetic resonance imaging (MRI) technique. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
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