LC3B globular structures correlate with survival in esophageal adenocarcinoma

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El-Mashad, Shereen M.
O'Donovan, Tracey R.
Kay, Elaine W.
Abdallah, Ayat R.
Cathcart, Mary-Clare
O'Sullivan, Jacintha
O'Grady, Anthony
Reynolds, John
O'Reilly, Seamus
O'Sullivan, Gerald C.
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Biomed Central Ltd.
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Background: Esophageal adenocarcinoma has the fastest growing incidence of any solid tumor in the Western world. Prognosis remains poor with overall five-year survival rates under 25 %. Only a limited number of patients benefit from chemotherapy and there are no biomarkers that can predict outcome. Previous studies have indicated that induction of autophagy can influence various aspects of tumor cell biology, including chemosensitivity. The objective of this study was to assess whether expression of the autophagy marker (LC3B) correlated with patient outcome. Methods: Esophageal adenocarcinoma tumor tissue from two independent sites, was examined retrospectively. Tumors from 104 neoadjuvant naïve patients and 48 patients post neoadjuvant therapy were assembled into tissue microarrays prior to immunohistochemical analysis. Kaplan-Meier survival curves and log-rank tests were used to assess impact of LC3B expression on survival. Cox regression was used to examine association with clinical risk factors. Results: A distinct globular pattern of LC3B expression was found to be predictive of outcome in both patient groups, irrespective of treatment (p < 0.001). Multivariate analysis found that this was a strong independent predictor of poor prognosis (p < 0.001). Conclusions: This distinctive staining pattern of LC3B represents a novel prognostic marker for resectable esophageal adenocarcinoma.
Stone like structures , Light chain 3b , Cancer cells , Prognostic relevance , Markers beclin-1 , Breast-cancer , Autophagy , Carcinomas , LC3B protein , Cell viability , Lymph node metastasis , Lymph vessel metastasis , Major clinical study , Overall survival , Perineural invasion , Retrospective study , Survival time , Treatment outcome , Tumor differentiation , Microtubule associated protein , Antibody specificity , Cancer adjuvant therapy , Cancer survival , Esophageal adenocarcinoma
EL-MASHED, S., O’DONOVAN, T. R., KAY, E. W., ABDALLAH, A. R., CATHCART, M.-C., O’SULLIVAN, J., O’GRADY, A., REYNOLDS, J., O’REILLY, S., O’SULLIVAN, G. C. & MCKENNA, S. L. 2015. LC3B globular structures correlate with survival in esophageal adenocarcinoma. BMC Cancer, 15:582, 1-12.