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Endothelial nitric oxide (eNOS) gene G894T and VNTR polymorphisms are closely associated with the risk of ischemic stroke development for Asians: meta-analysis of epidemiological studies

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Abstract

Although the relationships between endothelial nitric oxide synthase (eNOS) gene polymorphisms (including G894T, VNTR and T786C) and risk of ischemic stroke (IS) have been extensively studied, controversial results have been reported. The aim of this study was to assess the relationships between them by using a meta-analysis. Literatures were retrieved through the following databases: Medline, Embase and Wangfang (updated to January 1st, 2013). Fixed- or random-effects model was used to calculate pooled odds ratio and 95 % confidence interval (OR and 95 % CI). A total of 31 case–control studies including 8,547 patients and 9,117 controls were included in this meta-analysis eventually. For eNOS G894T polymorphism, the results indicated that TT genotype was significantly associated with increased risk of IS incidence compared to G allele (OR and 95 % CI 1.25 (1.09–1.42) for TT vs. GT+GG, P < 0.001). When subgroup analysis was conducted according to ethnicities, T allele was significantly associated with risk of IS for Asians rather than for Caucasians. For eNOS VNTR polymorphism, 4aa genotype was significantly associated with risk of IS incidence compared to 4bb genotype (OR (95 % CI) 2.22 (1.66–2.97) for aa vs. bb, P < 0.001). Similarly, when subgroup analyses were conducted, 4aa was closely associated with increased risk of IS for Asians rather than for Caucasians. For eNOS T786C polymorphism, it was not associated with risk of IS incidence. In conclusion, this study indicated that eNOS 894T and VNTR 4a allele was significantly associated with risk of IS incidence for Asians. However, eNOS T786C polymorphism was not a likely risk factor for IS incidence.

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  1. Department of Neurosurgery, The First Affiliated Hospital of Henan University of Science and Technology, Jinghua Road No. 24, Jianxi, Luoyang, Henan, People’s Republic of China

    Xiaolong Guo

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Guo, X. Endothelial nitric oxide (eNOS) gene G894T and VNTR polymorphisms are closely associated with the risk of ischemic stroke development for Asians: meta-analysis of epidemiological studies. Mol Biol Rep 41, 2571–2583 (2014). https://doi.org/10.1007/s11033-014-3115-8

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