WNT proteins are a family of secreted, cysteine-rich proteins containing 19 members. Signaling through WNT proteins is reported to be involved in carcinogenesis and cancer progression of gastrointestinal tumors, such as gastric cancer and colon cancer. The expression status of WNT6 in ESCCs and their clinico-prognostic significances remain to be elucidated. In this study, One-hundred and thirty-six patients with ESCC were explored. Paraffin-embedded tumor sections were stained with WNT6 antibody. The correlations between WNT6 expression and survival parameters were analyzed. The overall frequency of WNT6 over-expression was 50.7% (69/136) of advanced EC patients. For DMS and OS, over-expression of WNT6 remained the independent factor for worse prognosis (hazard ratio (HR), 2.425; 95% CI, 1.631-3.605; P < 0.001 for OS and HR, 2.238; 95% CI, 1.507-3.323; P < 0.001 for DMS, respectively). To conclude, our results support the concept that WNT6 may play a role in tumor progression. WNT6 over-expression inversely correlates with the poor long-term survival in ESCC patients. WNT6 can be considered as a predictor for recurrence.
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