Association between HIF-1α gene polymorphisms and lung cancer A meta-analysis

Hypoxia-inducible factor-1 (HIF-1), an important component of angiogenesis, is activated as a response to tumor hypoxia and facilitates tumor survival. Several case-control articles stressed the connection between lung cancer danger and HIF-1 alpha gene polymorphism, but the conclusions were conflicting. Thus, this meta-analysis was carried out to assess the connection between HIF-1 alpha gene polymorphisms (rs11549467, rs11549465, and rs2057482) and lung cancer risk. PubMed, Embase, Cochrane Library, and Google Scholar were systematically searched up to November 1, 2018. The study quality was quantified by the c. The odds ratios (ORs) and 95% confidence intervals (CIs) were pooled in 5 genetic models for assessment under a fixed- or random-effect model. Subgroup analyses were carried out by ethnicity and genotype method. Sensitivity analysis and publication bias were tested. Five eligible articles were enrolled. The rs11549467 significantly increased the lung cancer risk (OR [95% CI]: A vs G, 1.68 [1.03-2.76]; AA + AG vs GG, 1.70 [1.14-2.54]; AA vs GG, 1.59 [1.21-2.10]), whereas neither rs11549465 nor rs2057482 was related with the lung cancer risk. Subgroup analysis showed rs11549465 and rs11549467 increased lung cancer risk among Asians, but not whites. HIF-1 alpha rs2057482 was unrelated to the risk of lung cancer in Asians and whites. HIF-1 alpha gene rs11549465 and rs11549467, but not rs2057482, increased the risk of lung cancer among Asians.