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Annals of Oncology 12:75-80, 2001
© 2001 European Society for Medical Oncology

research-article

Metalloproteinase expression and prognosis in soft tissue sarcomas

M. S. Benassi1, G. Gamberi1, G. Magagnoli1, L. Molendini1, M. Merli1, F. Chiesa2, A. Balladelli1, M. Manfrini3, F. Bertoni4, M. Mercuri3 and P. Picci1

1Laboratory of Oncologic Research,Rizzoli Orthopaedic Institute Bologna, Italy
2Department of Musculoskelelal Oncology,Rizzoli Orthopaedic Institute Bologna, Italy
3Fifth Orthopedic Division Rizzoli Orthopaedic Institute Bologna, Italy
4Department of Pathology, Rizzoli Orthopaedic Institute Bologna,Italy

Dr M S Benassi Laboratory of Oncologic Research Istituti Ortopedici Rizzoli Viadi Barbiano 1/10 40136 Bologna Italy E-mail manaserena.benassi{at}ior.it

BACKGROUND: Degradation of extracellular matrix by tumor-associated proteases can promote cell invasion and metastasis This study assessed the prognostic role of MMP2, MMP9 metalloproteinases, and of the metalloproteinase inhibitor TIMP2, related to disease-free survival (DFS), in soft tissue sarcoma (STS) patients

MATERIALS AND METHODS: Level and distribution of MMP2, MMP9, and TIMP2 expression were evaluated on 73 biopsies by immunohistochemistry and lmmunoblotting Biopsies included 29 hposarcomas, 29 synovial sarcomas, and 15 malignant peripheral nerve sheath tumors (MPNST) Association between DFS and overall survival with different variables was assessed.

RESULTS: In terms of DFS, increased MMP2 reactivity and lack of TIMP2 expression were significant for poor prognosis in all samples (P = 0.0005 and P = 0.006 respectively). MMP2 correlated to histologic grade (P = 0.005). Lack of TIMP2 expression was a poor prognostic factor for DFS in synovial sarcoma (P= 0 009), while MMP2 and MMP9 correlated with metastasis (P = 0.008 and P= 0.005, respectively) and grade (P = 0.001 and P = 0 04 respectively) in liposarcoma

CONCLUSIONS: These prognostic markers that influence growth and spread of tumor cells might be useful to define tumor aggressiveness and risk of the metastasic event

immunohistochemistry, metalloproteinases, metalloproteinase inhibitor, prognosis, soft tissue sarcoma


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