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Expression of matrix metalloproteinases, their inhibitors, and urokinase plasminogen activator in human meningiomas

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MMP-2, MMP-9, and uPA have been previously described as important to the invasive and metastatic potential of human tumors, including breast, lung, glioblastoma, and prostate. We examined the activity of these proteases and the levels of their inhibitors (TIMP-1 and TIMP-2) in a series of human meningioma tissue samples. Normal brain tissue did not show elevated levels of uPA, MMP-2 or MMP-9 activity. Meningiomas showed a mild, to moderate to significantly high level of uPA, MMP-2, and MMP-9. However, no increase in TIMP-1 or TIMP-2 levels was detected. Immunohistochemistry confirmed the assay findings and localized these molecules to the cell surface. The findings provide evidence for elevated levels of uPA and MMPs in meningiomas and suggest a therapeutic target for minimizing the malignant propensity of meningiomas using protease inhibitors.
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Document Type: Research Article

Affiliations: Department of Neurosurgery, University of Illinois College of Medicine at Peoria, IL 61656, USA

Publication date: February 1, 2003

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  • The International Journal of Oncology provides an international forum for the publication of the latest, cutting-edge research in the broad area of oncology and cancer treatment. The journal accepts original high quality works and reviews on all aspects of oncology research including carcinogenesis, metastasis, epidemiology, chemotherapy and viral oncology. Through fair and efficient peer review, the journal is dedicated to publishing top tier research in the field, offering authors rapid publication as well as high standards of copy-editing and production. The International Journal of Oncology is published on a monthly basis in both print and early online.
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