Increased gelatinase A (MMP-2) and gelatinase B (MMP-9) activities in human brain after focal ischemia

Clark, Arthur W., Krekoski, Craig A., Bou, Shao-Sun, Chapman, Kevin R. and Edwards, Dylan R. (1997) Increased gelatinase A (MMP-2) and gelatinase B (MMP-9) activities in human brain after focal ischemia. Neuroscience Letters, 238 (1-2). pp. 53-6. ISSN 0304-3940

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Abstract

Matrix metalloproteinases (MMPs) are involved in remodelling extracellular matrix. Gelatinase B (MMP-9) is an inducible 92 kDa MMP expressed by neutrophils, microglia, and endothelial cells. Gelatinase A (MMP-2) is a 72 kDa MMP, constitutively expressed in brain. Elevated MMP activity has been linked to various pathologic conditions, and the therapeutic benefit of MMP inhibitors is under study in a few experimental models. Using gelatin zymography, we have compared activities of these MMPs in infarcted and matched non-infarcted cerebral tissue from eight subjects dying at intervals of less than 2 h to several years after a stroke. Gelatinase B activity was markedly elevated in the infarcted tissue at two days post-infarction, and remained elevated in cases dying months after the event. Increases in gelatinase A activity were subtle at 2-5 days; they were marked and significant in cases dying at 4 months and later. The findings indicate distinct temporal profiles of post-ischemic gelatinase activity in human brain, with earlier but equally persistent elevation in gelatinase B when compared to gelatinase A.

Item Type: Article
Uncontrolled Keywords: aged,aged, 80 and over,brain ischemia,collagenases,female,gelatinases,humans,male,matrix metalloproteinase 2,matrix metalloproteinase 9,metalloendopeptidases,middle aged,time factors
Faculty \ School: Faculty of Science > School of Biological Sciences
Depositing User: Pure Connector
Date Deposited: 25 Mar 2015 13:52
Last Modified: 22 Apr 2020 00:03
URI: https://ueaeprints.uea.ac.uk/id/eprint/52960
DOI: 10.1016/S0304-3940(97)00859-8

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