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Prognostic value of vascular endothelial growth factor A expression in gastric cancer: a meta-analysis

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Tumor Biology

Abstract

Vascular endothelial growth factor A (VEGF-A) is considered as a prime mediator of angiogenesis and has been implicated in carcinogenesis and metastasis. Various studies examined the relationship between VEGF-A overexpression with the clinical outcome in patients with gastric cancer, but yielded conflicting results. Electronic databases updated to September 2013 were searched to find relevant studies. A meta-analysis was conducted with eligible studies which quantitatively evaluated the relationship between VEGF-A overexpression and survival of patients with gastric cancer. Survival data were aggregated and quantitatively analyzed. We performed a meta-analysis of 20 studies that evaluated the correlation between VEGF-A overexpression and survival in patients with gastric cancer. Combined hazard ratios suggested that VEGF-A overexpression had an unfavorable impact on overall survival (OS) (hazard ratio [HR] = 1.57; 95 % confidence interval [CI], 1.30–1.84) and disease-free survival (DFS) (HR = 1.85; 95 % CI, 1.39–2.32) in patients with gastric cancer. No significant heterogeneity (P = 0.487) was observed among 16 studies for OS and among 7 studies for DFS (P = 0.435). VEGF-A overexpression indicates a poor prognosis for overall survival and disease-free survival in patients with gastric cancer.

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Correspondence to Zhi Wang.

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Y-N. Ji, Q. Wang, and Y. Li contributed equally to this work and should be considered as co-first authors.

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Ji, Yn., Wang, Q., Li, Y. et al. Prognostic value of vascular endothelial growth factor A expression in gastric cancer: a meta-analysis. Tumor Biol. 35, 2787–2793 (2014). https://doi.org/10.1007/s13277-013-1371-1

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