Conclusions: In the current study matrix metalloproteinases (MMPs)-9 and -13 were associated with the prognosis in salivary gland cancer (SGC), indicating that they contribute to the progression and invasion of these malignant tumours.
Objectives: Elevated levels of certain MMPs have been detected in various advanced human cancer types. The purpose of the study was to analyse the expression of MMP-1, -9 and -13 in SGC by immunohistochemistry and correlate the results to the clinical data and 10-year survival of SGC patients in a nationwide material.
Materials And Methods: Immunohistochemistry for MMP-1, -9 and -13 was performed in series of 103 paraffin-embedded sections of SGC.
Results: High MMP-13 staining intensity predicted poor survival (3 vs 1; p=0.08) in the whole material studied. High MMP-13 intensity (2+3 vs 1; p=0.05), percentage (2 vs 1; p=0.03) and index (3 vs 1; p=0.02) were associated with poor survival in acinic cell carcinoma. However, high MMP-9 index in adenoid cystic carcinoma (p=0.06) and the percentage of positively staining cells in salivary duct carcinoma patients (p=0.05) was associated with poor survival. High MMP-1 staining intensity (2 vs 0; p=0.06) and index (% x intensity); (2 vs 1, p=0.04) were associated with better overall survival in the whole material.
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