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In Vitro enzymatic degradation of poly (glycerol sebacate)-based materials

Paper ID Volume ID Publish Year Pages File Format Full-Text
7240 542 2011 11 PDF Available
Title
In Vitro enzymatic degradation of poly (glycerol sebacate)-based materials
Abstract

Enzymatic degradation is a major feature of polyester implants in vivo. An in vitro experimental protocol that can simulate and predict the in vivo enzymatic degradation kinetics of implants is of importance not only to our understanding of the scientific issue, but also to the well-being of animals. In this study, we explored the enzymatic degradation of PGS-based materials in vitro, in tissue culture medium or a buffer solution at the pH optima and under static or cyclic mechanical-loading conditions, in the presence of defined concentrations of an esterase. Surprisingly, it was found that the in vitro enzymatic degradation rates of the PGS-based materials were higher in the tissue culture medium than in the buffered solution at the optimum pH 8. The in vitro enzymatic degradation rate of PGS-based biomaterials crosslinked at 125 °C for 2 days was approximately 0.6–0.9 mm/month in tissue culture medium, which falls within the range of in vivo degradation rates (0.2–1.5 mm/month) of PGS crosslinked at similar conditions. Enzymatic degradation was also further enhanced in relation to mechanical deformation. Hence, in vitro enzymatic degradation of PGS materials conducted in tissue culture medium under appropriate enzymatic conditions can quantitatively capture the features of in vivo degradation of PGS-based materials and can be used to indicate effective strategies for tuning the degradation rates of this material system prior to animal model testing.

Keywords
Enzymatic degradation; Esterase; Poly(glycerol sebacate); In vitro
First Page Preview
In Vitro enzymatic degradation of poly (glycerol sebacate)-based materials
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 32, Issue 33, November 2011, Pages 8486–8496
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering