Background: The role of tumor matrix metalloproteinase-9 (MMP-9) expression in non-small cell lung cancer (NSCLC) remains controversial. In this study, we investigated the prognostic value of tumor MMP-9 expression and other clinicopathologic factors in patients with completely resected NSCLC. Methods: This retrospective study included patients who underwent complete resection of pathological stage I-IIIA NSCLC at Severance Hospital, Seoul, Korea, between 1998 and 2009. Tumor samples of 417 patients were stained by immunohistochemistry, and the expression of MMP-9 in tumor cells was evaluated, using the median immunohistochemical score of 10 (range, 0-300) as the cut-off. Results: Tumor MMP-9 expression was observed in 161 (38.6%) of 417 patients. Log-rank analysis showed a significant association of tumor MMP-9 expression with shortened disease-free survival (p=0.01) but not with overall survival (p=0.109). Multivariate analysis demonstrated that tumor MMP-9 expression was not an independent prognostic factor of recurrence (p=0.142) or survival (p=0.807). However, among patients with adenocarcinoma, tumor MMP-9 expression was associated with relapse (p=0.003) and poor survival (p=0.033). Furthermore, tumor MMP-9 expression was an independent prognostic indicator of relapse in patients with adenocarcinoma (p=0.035). Conclusions: Among patients with NSCLC, tumor MMP-9 expression was associated with poor outcomes in those with adenocarcinoma, but not in those with squamous cell carcinoma. In addition, MMP-9 expression was identified as an independent predictor of relapse of completely resected lung adenocarcinoma.
CITATION STYLE
Lee, C. Y., Shim, H. S., Lee, S., Lee, J. G., Kim, D. J., & Chung, K. Y. (2015). Prognostic effect of matrix metalloproteinase-9 in patients with resected Non small cell lung cancer. Journal of Cardiothoracic Surgery, 10(1). https://doi.org/10.1186/s13019-015-0248-3
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