ERCC1 expression is a predictor of survival in gastric cancer patients treated with surgery and adjuvant chemotherapy
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The aim of this study was to evaluate the effect of the excision repair cross-complementing (ERCC1) expression on survival in advanced gastric cancer patients who underwent surgical resection and treated with oxaliplatinbased adjuvant chemotherapy.
Sixty-three patients who underwent surgical resection for cure and treated with oxaliplatin-based adjuvant chemotherapy were included in this study. The expressions of ERCC1 of gastric cancer were examined by immunohistochemistry and the patients were categorized into ERCC1-(+) and ERCC1-(-) groups. The relation between ERCC1 expression and survival of patients was examined.
Of the 63 eligible patients, 36 patients (57.1%) had tumor with a positive expression of ERCC1 and the remaining 27 patients had tumor with a negative ERCC1 expression. Expression differences of ERCC1 didn’t correlated with age (P = 0.827), gender (P = 0.12), differentiation (P = 0.113), histological type (P = 0.942), site of tumor (P = 0.221), size of tumor (P = 0.608), stage (P = 0.815) and lymphatic invasion (P = 0.165). Overall survival (OS) was significantly longer in patients without ERCC1 expression, when compared to patients with ERCC1 expression (P = 0.023). Multivariate analysis revealed that ERCC1 expression significantly impacted on OS (HR: 4.049; P = 0.000).
We concluded that resected and treated with oxaliplatin-based adjuvant chemotherapy gastric cancer patients without ERCC1 expression have a better survival when compared to patients with ERCC1 expression. ERCC1 expression will hopefully provide a rational basis for improving adjuvant chemotherapeutic strategies for gastric cancer patients. ERCC1, itself, may be a prognostic factor for gastric cancer.
Key wordsadjuvant chemotherapy oxaliplatin ERCC1 gastric cancer survival
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