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Expression of Matrix Metalloproteinase-9 Correlates with Poor Prognosis in Human Malignant Fibrous Histiocytoma

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Abstract

Purpose: 92 kDa matrix metalloproteinase-9 (MMP-9) is believed to play an important role in degrading the matrix and basement membrane, contributing to the invasion and metastasis of malignant solid tumors. However, little is known about its involvement in a malignant fibrous histiocytoma. The aim of this study was to investigate the expression of MMP-9 and to correlate its expression with clinicopathologic parameters in human malignant fibrous histiocytomas. Materials and Methods: Archival tumor tissues from 20 patients with a malignant fibrous histiocytoma were analyzed by immunohistochemistry for the expression of MMP-9. Clinical information was obtained through the computerized retrospective database from the tumor registry. Results: Seventeen of 20 (85%) tumors showed a positive reaction for MMP-9. MMP-9 activity was inversely correlated with patients' survival time (p=.011). There was no significant correlation between the activated MMP-9 expression and all the other clinicopathologic variables. Conclusion: Our data demonstrate that MMP-9 activation is likely to occur in human malignant fibrous histiocytomas. It is also noteworthy that the expression of MMP-9 may aid in predicting patients' poor prognosis.(Cancer Res Treat. 2004;36:384-388)

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