Poly (acrylic acid) chitosan interpolymer complexes for stomach controlled antibiotic delivery

The aim of this study was to develop a stomach‐specific drug delivery system to increase the efficacy of amoxicillin against Helicobacter pylori. Polyacrylic acid (PAA), chitosan (CS), and amoxicillin (A) were employed to obtain polyionic complexes. The design of the hydrogel delivery system was bas...

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Bibliographic Details
Published in:Journal of biomedical materials research 2005-01, Vol.72B (1), p.191-197
Main Authors: de la Torre, Paloma M., Torrado, Guillermo, Torrado, Santiago
Format: Article
Language:English
Subjects:
Acrylic Resins - chemistry
Adult
Amoxicillin - administration & dosage
Amoxicillin - metabolism
amoxicillin release
chitosan
Chitosan - chemistry
Drug Delivery Systems - instrumentation
Drug Delivery Systems - methods
Female
Gastric Juice - metabolism
Helicobacter Infections - drug therapy
Helicobacter Infections - microbiology
Helicobacter pylori
Humans
Kinetics
Male
Microscopy, Electron, Scanning
Organ Specificity
polyacrylic acid
polyionic complex
Stomach - physiology
swelling systems
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Summary:The aim of this study was to develop a stomach‐specific drug delivery system to increase the efficacy of amoxicillin against Helicobacter pylori. Polyacrylic acid (PAA), chitosan (CS), and amoxicillin (A) were employed to obtain polyionic complexes. The design of the hydrogel delivery system was based on the swellable approach; with a floating feature to prolong the Gastric Residence Time (GRT). The polyionic complex (PAA:CS:A 2.5:5:2) showed a sustained drug release profile in enzyme‐free simulated gastric fluid (SGF) and pH 4.0. A pH independent swelling‐eroding pattern with adequate maximum swelling ratios of 17.76 and 13.42 was obtained at in SGF and pH 4.0, respectively, with similar eroding profiles in both pH media. This network carrier provides an amoxicillin protective effect towards the hydrolytic degradation in SGF. The in vivo study was performed on healthy volunteers, using the [13C] octanoic acid breath test. The proposed hydrogel showed a prolonged GRT of up to 3 h. The preliminary results from this study suggest that amoxicillin polyionic complexes have potential for improving local antibiotic therapy against H. pylori. © 2004 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 72B: 191–197, 2005
ISSN:1552-4973
0021-9304
1552-4981
DOI:10.1002/jbm.b.30134