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In vitro release of bovine serum albumin from alginate/HPMC hydrogel beads

Nochos, Argyrios, Douroumis, Dionysios, Bouropoulos, Nikolaos (2008) In vitro release of bovine serum albumin from alginate/HPMC hydrogel beads. Carbohydrate Polymers, 74 (3). pp. 451-457. ISSN 0144-8617. (doi:10.1016/j.carbpol.2008.03.020) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1016/j.carbpol.2008.03.020

Abstract

In recent years, the use of swelling polymeric matrices for the encapsulation and controlled release of protein drugs has received significant attention. The purpose of the present study was to investigate the release of albumin, a model protein from alginate/hydroxypropyl-methylcellulose (HPMC) gel beads. A hydrogel system comprised of two natural, hydrophilic polymers; sodium alginate and HPMC was studied as a carrier of bovine serum albumin (BSA) which was used as a model protein. The morphology, bead size and the swelling ratio were studied in different physical states; fully swollen, dried and reswollen using scanning electron microscopy and image analysis. Finally the effect of different alginate/HPMC ratios on the BSA release profile in physiological saline solution was investigated. Swelling experiments revealed that the bead diameter increases with the viscosity of the alginate solution while the addition of HPMC resulted in a significant increase of the swelling ratio. The BSA release patterns showed that the addition of HPMC increased the protein-release rate while the release mechanism fitted the Peppas model. Alginate/HPMC beads prepared using the ionic gelation exhibited high BSA loading efficiency for all formulations. The presence of HPMC increased the swelling ability of the alginate beads while the particle size remained unaffected. Incorporation of HPMC in the alginate gels also resulted in improved BSA release in physiological saline solution. All formulations presented a non-Fickian release mechanism described by the Peppas model. In addition, the implementation of non-parametric tests showed significant differences in the release patterns between the alginate/HPMC and the pure alginate beads, respectively.

Item Type: Article
DOI/Identification number: 10.1016/j.carbpol.2008.03.020
Additional information: number of additional authors: 2;
Uncontrolled keywords: Calcium alginate beads; Hydrogels; Swelling; Release mechanism; Peppas model
Subjects: Q Science
Divisions: Faculties > Sciences > Medway School of Pharmacy
Depositing User: Stewart Brownrigg
Date Deposited: 07 Mar 2014 00:05 UTC
Last Modified: 29 May 2019 12:24 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/40431 (The current URI for this page, for reference purposes)
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