Abstract
The prognostic role of Bcl-2 in gastric cancer remains controversial. We systematically reviewed the evidence for the effect of Bcl-2 expression in gastric cancer to elucidate this issue. PubMed, EMBASE, and Web of Science were searched to identify eligible studies to evaluate the association between Bcl-2 expression and overall survival (OS) and clinicopathological features of gastric cancer. Hazard ratios (HRs) or odds ratios (ORs) with 95 % confidence interval (95 % CI) were pooled to estimate the effect. Bcl-2 expression was not significantly correlated with OS of gastric cancer patients (combined HR 0.88, 95 % CI 0.62–1.25). Subgroup analysis indicated that Bcl-2 expression had a favorable impact on OS in Asian countries (HR 0.60, 95 % CI 0.47–0.77) and cutoff value <15 % (HR 0.69, 95 % CI 0.48–0.97). Furthermore, Bcl-2 expression was significantly associated with TNM stage (OR 0.58, 95 % CI 0.41–0.80), the depth of invasion (OR 0.53, 95 % CI 0.37–0.76), and lymph node metastasis (OR 0.55, 95 % CI 0.42–0.71). Bcl-2 expression predicts less invasion and malignancy in clinicopathological features. Moreover, Bcl-2 could be a favorable prognostic marker for patients of Asian countries.
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We thank all colleagues from the Department of General Surgery, Chinese People’s Liberation Army General Hospital, for their help and supports in this study.
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Haidong Cheng and Xiumei Wang have contributed equally to this work.
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Cheng, H., Wang, X., Li, T. et al. Bcl-2 expression and patient survival in gastric cancer: a systematic review of the literature with meta-analysis. Med Oncol 32, 389 (2015). https://doi.org/10.1007/s12032-014-0389-6
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DOI: https://doi.org/10.1007/s12032-014-0389-6