Published in:
01-04-2015 | Original Article - Clinical Oncology
The prognostic significance of p53 expression in gastric cancer: a meta-analysis
Published in: Journal of Cancer Research and Clinical Oncology | Issue 4/2015
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Objective
This meta-analysis was conducted to quantitatively assess the prognostic significance of p53 expression in gastric cancer patients.
Methods
A systematic literature search was conducted to identify eligible studies in PubMed and Embase. The pooled hazard ratios (HRs) or odds ratios (ORs) with their corresponding 95 % confidence intervals (95 % CIs) were used to estimate the effect sizes. Moreover, meta-regression analysis and subgroup analysis were carried out.
Results
A total of 34 studies comprising 6,599 patients were subjected to final analysis. Positive/high p53 expression was significantly associated with poorer overall survival (HR 1.56, 95 % CI 1.23–1.98) and disease-specific survival (HR 1.52, 95 % CI 1.35–1.73). The results also indicated that positive/high p53 expression was significantly associated with gender (OR 1.26, 95 % CI 1.09–1.45), Lauren’s classification (OR 1.68, 95 % CI 1.23–2.29), the depth of invasion (OR 0.68, 95 % CI 0.56–0.83), lymph node metastasis (OR 1.56, 95 % CI 1.23–1.97), TNM stage (OR 0.57, 95 % CI 0.47–0.69), vascular invasion (OR 1.51, 95 % CI 1.18–1.92) and lymphatic invasion (OR 1.38, 95 % CI 1.11–1.72), but not with Bormann type (OR 1.24, 95 % CI 0.91–1.70), grade of differentiation (OR 1.08, 95 % CI 0.82–1.44) or distant metastasis (OR 1.37, 95 % CI 0.92–2.03).
Conclusions
This meta-analysis suggests positive/high p53 expression may be a useful biomarker to predict a poorer prognosis for patients with gastric cancer.