Background: Diminished systemic serum butyrylcholinesterase (BChE), a biomarker for chronic inflammation, cachexia, and advanced tumor stage, has shown to play a prognostic role in various malignancies. Aim of this study was to investigate the prognostic value of pretherapeutic BChE levels in patients with resectable adenocarcinoma of the gastroesophageal junction (AEG), treated with or without neoadjuvant therapy.
Methods: Data of a consecutive series of patients with resectable AEG at the Department for General Surgery, Medical University of Vienna were analyzed. Preoperative serum BChE levels were correlated to clinic-pathological parameters as well as treatment response. Prognostic impact of serum BChE levels on disease free (DFS) and overall survival (OS) were evaluated by univariate and multivariate cox regression analysis, Kaplan-Meier curves used for illustration.
Results: 319 patients were included in this study, with an overall mean (Standard deviation, SD) pretreatment serum BChE level of 6.22 (+/-1.91) IU/l. In univariate models, diminished preoperative serum BChE levels were significantly associated with shorter overall (OS, p<0.003) and disease-free survival (DFS, p<0.001) in patients who received neoadjuvant treatment and/or primary resection. In multivariated analysis, decreased BChE was significantly associated with shorter DFS (HR: 0.92, 95%-CI: 0.84-1.00, p 0.049) and OS (HR: 0.92, 95%-CI: 0.85-1.00, p<0.49) in patients receiving neoadjuvant therapy. Backward regression identified the interaction between preoperative BChE and neoadjuvant chemotherapy as an predictive factor for DFS and OS.
Conclusion: Serum BChE serves as strong, independent, and cost-effective prognostic biomarker for worse outcome in patients with resectable AEG who had received neoadjuvant chemotherapy.
Synopsis
Diminished systemic serum Butyrylcholinesterase (BChE) serves as a strong and independent prognostic biomarker for shortened DFS and OS in patients with resectable adenocarcinoma of the gastroesophageal junction (AEG) after preoperative neoadjuvant treatment. BChE levels could be of use in clinical practice when measured prior to surgery, especially in those patients who had received neoadjuvant chemotherapy.