The effect of a hydroxamic acid-containing polymer on active matrix metalloproteinases
| Autor: | Gary A. Skarja, Michael H. May, Allison L. Brown, Rebecca K. Ho, Michael V. Sefton |
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| Rok vydání: | 2008 |
| Předmět: |
chemistry.chemical_classification
Materials science Hydroxamic acid Polymers Biophysics Bioengineering Biocompatible Materials Polymer Matrix metalloproteinase Hydroxamic Acids Matrix Metalloproteinases Microspheres Fluid extract Microsphere Catalysis Biomaterials Enzyme Activation chemistry.chemical_compound chemistry Biochemistry Mechanics of Materials Ceramics and Composites Copolymer Humans Derivatization |
| Zdroj: | Biomaterials. 30(10) |
| ISSN: | 1878-5905 |
| Popis: | Matrix metalloproteinase (MMP) sequestering polymer microspheres were prepared by a post-polymerization hydroxamic acid derivatization of poly(methyl methacrylate-co-methacrylic acid). The microspheres were designed to selectively bind MMPs from solutions on contact through a direct interaction between the polymer-bound hydroxamic acid groups and the characteristic catalytic site zinc atom common to all MMPs. MMP activity assays showed that the hydroxamic acid microspheres reduce MMP activity on contact in a time and concentration-dependent fashion. This effect was observed for several MMP subclasses (MMP-2, -3, -8 and -13) suggesting that the microspheres possess a broad-spectrum MMP binding capacity. However, inactive pro-forms of MMPs showed little binding affinity for the microspheres indicating that the interaction was dependent on MMP activation. The preferential binding of active MMPs was confirmed by MMP-3 and MMP-8 activation studies, which demonstrated significant increases in microsphere binding on activation. The MMP sequestering effect of the microspheres was also demonstrated in a physiologically relevant solution (human chronic wound fluid extract) indicating that the binding interaction was effective in a multi-component, competitive adsorption environment. Thus, the hydroxamic acid-containing microspheres may find use as localized, broad-spectrum MMP inhibitors for the treatment of a number of disease conditions characterized by elevated MMP activity. |
| Databáze: | OpenAIRE |
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