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Title: Peroral delivery of insulin using chitosan derivatives: A comparative study of polyelectrolyte nanocomplexes and nanoparticles
Authors: Anchalee Jintapattanakit
Varaporn B. Junyaprasert
Shirui Mao
Johannes Sitterberg
Udo Bakowsky
Thomas Kissel
Mahidol University
Universitat Marburg
Shenyang Pharmaceutical University
Keywords: Pharmacology, Toxicology and Pharmaceutics
Issue Date: 5-Sep-2007
Citation: International Journal of Pharmaceutics. Vol.342, No.1-2 (2007), 240-249
Abstract: Polymeric delivery systems based on nanoparticles (NP) have emerged as a promising approach for peroral insulin delivery. Using a trimethyl chitosan (TMC) and a PEG-graft-TMC copolymer, polyelectrolyte complexes (PEC) and nanoparticles were prepared and their properties were compared. The amount of insulin was quantified by HPLC and the stability of PEC and NP upon exposure to simulated gastrointestinal (GI) fluid was monitored by dynamic laser light scattering. It was shown that polymer/insulin (+/-) charge ratio played an important role in PEC and NP formation. Stable, uniform, and spherical PEC/NP with high insulin association efficiency (AE) were formed at or close to optimized polymer/insulin (+/-) charge ratio, depending on polymer structure. All PEC were more stable in pH 6.8 simulated intestinal fluid (SIF) than NP. The PEC also appeared to play some role in protecting insulin from degradation at higher temperature and with proteolytic enzyme more efficiently than NP. On the basis of these results, polyelectrolyte complexation can be suggested as a potentially useful technique for generating insulin delivery systems for peroral administration. © 2007 Elsevier B.V. All rights reserved.
ISSN: 03785173
Appears in Collections:Scopus 2006-2010

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