Abstract
Aim. To investigate clinical significance of runt-related transcription factor (RUNX)-2 in epithelial ovarian cancer (EOC). Methods. RUNX2 protein expression and its subcellular localization were detected by immunohistochemistry in 116 patients with EOC. Results. RUNX2 protein was predominantly expressed in cell nucleus of EOC tissues. The expression level of RUNX2 in EOC tissues was significantly higher than that in normal ovarian tissues (P < 0.001). In addition, the nuclear labeling index (LI) of RUNX2 in tumor cells was significantly associated with the advanced clinical stage of EOC tissues (P = 0.001). Moreover, EOC patients with high RUNX2 LI had significantly shorter overall (P < 0.001) and progression-free (P = 0.002) survival than those with low RUNX2 LI. Especially, subgroup analysis revealed that EOC patients with high clinical stages (III~IV) in high RUNX2 expression group demonstrated a significantly worse clinical outcome than those in low RUNX2 expression group, but patients with low clinical stages (I~II) had no significantly different prognosis between high and low RUNX2 expression groups. Conclusions. Our data suggest for the first time that RUNX2 overexpression is associated with advanced tumor progression and poor clinical outcome of EOC patients. RUNX2 might be a novel prognostic marker of EOC.
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