Abstract
The role of hypoxia-inducible factors-1 alpha (HIF-1α) expression in gastric cancer remains controversial. We performed a systematic review of the literature with meta-analysis. Electronic databases were used to identify published studies before December 1, 2012. Pooled hazard ratio (HR) or odds ratio (OR) with 95 % confidence interval (95 % CI) was used to estimate the strength of the association between HIF-1α expression and survival of gastric cancer patients. Heterogeneity and publication bias were also assessed. Final analysis of 1,268 patients from 9 eligible studies was performed. High HIF-1α expression was significantly correlated with poor overall survival (OS) of gastric cancer patients (HR = 2.14, 95 % CI = 1.32–3.48). Subgroup analysis indicated that HIF-1α over-expression had an unfavorable impact on OS in Asian patients (HR = 2.35, 95 % CI = 1.41–3.92). Moreover, up-regulation of HIF-1α was significantly associated with the depth of invasion (OR = 2.49, 95 % CI = 1.28–4.83), lymph node metastasis (OR = 2.15, 95 % CI = 1.27–3.66), and vascular invasion (OR = 2.23, 95 % CI = 1.20–4.14). HIF-1α expression might be a predicative factor of poor prognosis for gastric cancer particularly in Asia.
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Acknowledgments
This work was partly supported by the Grants from Committee of Education project of Anhui province (Code: KJ2012A151), and the National Natural Science Foundation of China (81272397). We thank all the people who give the help for this study.
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The auhtors declare that they have no conflict of interest.
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Zhu, Cl., Huang, Q., Liu, Ch. et al. Prognostic value of HIF-1α expression in patients with gastric cancer. Mol Biol Rep 40, 6055–6062 (2013). https://doi.org/10.1007/s11033-013-2715-z
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DOI: https://doi.org/10.1007/s11033-013-2715-z