Abstract
Glia synthesize, package, and secrete several species of matrix proteases, including the gelatinases (pro-)MMP-2 and (pro-)MMP-9. In appropriate settings (e.g., experimental ischemia), these MMPs can be assayed from cerebral tissues or from astrocytes and microglia in culture by enzymatic substrate-dependent assays and by gelatin-based zymography. We describe the methodologies for the sensitive quantitative development of the inactive and active forms of both MMP-2 and MMP-9 from tissues and cells, by means of lysis of the collagen substrate in collagen-impregnated gel electropheresis by the zymogen and active gelatinases. These methodologies are a refinement of those used commonly, with instructions to increase sensitivity. Serious and often overlooked issues regarding sources of sample contamination and elements confounding the MMP band development and their interpretation are discussed.
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Acknowlegments
This work was supported in part by NIH grants NS 053716, NS 038710, and NS 036945 to Dr. del Zoppo. Special thanks to Greta Berg for manuscript preparation.
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Frankowski, H., Gu, YH., Heo, J.H., Milner, R., del Zoppo, G.J. (2012). Use of Gel Zymography to Examine Matrix Metalloproteinase (Gelatinase) Expression in Brain Tissue or in Primary Glial Cultures. In: Milner, R. (eds) Astrocytes. Methods in Molecular Biology, vol 814. Humana Press. https://doi.org/10.1007/978-1-61779-452-0_15
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DOI: https://doi.org/10.1007/978-1-61779-452-0_15
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