Abstract
In this study the expression levels of reversion-inducing-cysteine-rich protein with Kazal motifs (RECK) in gastric cancer cell lines and tissues have been analysed in order to assess their value as a prognostic indicator. The expressions of RECK, activated matrix metalloproteinase (MMP)-7, and vascular endothelial growth factor (VEGF) in gastric cancer tissues and cell lines were evaluated by Western blot analysis; and MMP-2 and MMP-9 were evaluated by gelatin zymography. RECK expression in the context of gastric cancer was also compared with various clinicopathologic parameters and compared to the expression of activated MMP-7, MMP-2, and MMP-9. Fifty-two percent of the 102 gastric cancer tissues and 81.8% of the 11 gastric cancer cell lines exhibited reduced RECK expression. We also detected a significant inverse correlation between RECK expression and macroscopic tumour growth ( P = 0.018), lymphatic invasion ( P = 0.018), lymph node metastasis ( P = 0.000), stage ( P = 0.000), and MMP-9 ( P = 0.039). No correlation between RECK expression and MMP-7 and MMP-2, VEGF were detected. Our data strongly supports the hypothesis that RECK is a suppressor of malignancy, and constitutes a good prognostic indicator in gastric cancer.
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