Abstract
Background
Melanoma antigen-encoding gene-1 (MAGE-1), a cancer/testis antigen, has been reported to be expressed in various types of cancer. We investigated the clinicopathological features and prognostic significance of MAGE-1 expression in advanced gastric cancer (AGC).
Methods
Immunohistochemical staining for MAGE-1 was performed on surgical specimens obtained from 135 patients with AGC.
Results
Positive expression of MAGE-1 detected in cytoplasm was observed in 44 of 135 cases (32.6%) in primary tumors and 26 of 96 (27.1%) in lymph node metastases. In noncancerous gastric tissues, apparent MAGE-1 expression was not detected. MAGE-1 in primary tumor was correlated with advanced age (P < 0.001), macroscopic infiltrated type (P = 0.035), and presence of vascular invasion (P = 0.027). The 5-year cancer-specific survival rates of AGC patients with positive MAGE-1 expression were significantly lower than those of patients with negative MAGE-1 (positive: 31.6%, negative: 57.6%, P = 0.038). On multivariate analysis, MAGE-1 expression was not an independent prognostic predictor of AGC (P = 0.064). In differentiated AGC patients, MAGE-1 expression was correlated with advanced age (P = 0.003), macroscopic infiltrated type (P = 0.009), and presence of lymph node metastasis (P = 0.033). The cancer-specific survival rates of differentiated AGC patients with positive MAGE-1 were significantly lower than those of patients with negative MAGE-1 (P = 0.003). Positive MAGE-1 expression was an independent prognostic factor of differentiated AGC patients on multivariate analysis (P = 0.031).
Conclusions
These findings suggest that MAGE-1 protein expression can serve as a predictive marker of poor prognosis in differentiated AGC patients.
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Acknowledgement
The authors would like to thank M. Sakai, T. Kobayashi, E. Yamaki, and K. Araki for helpful discussions. We are also grateful to R. Aoyagi for excellent technical assistance.
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Ogata, K., Aihara, R., Mochiki, E. et al. Clinical Significance of Melanoma Antigen-Encoding Gene-1 (MAGE-1) Expression and its Correlation with Poor Prognosis in Differentiated Advanced Gastric Cancer. Ann Surg Oncol 18, 1195–1203 (2011). https://doi.org/10.1245/s10434-010-1399-z
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DOI: https://doi.org/10.1245/s10434-010-1399-z