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The C825T Polymorphism of the G-Protein β3 Subunit Gene and Its Association with Hypertension and Stroke: An Updated Meta-Analysis

Author

Listed:
  • Lu Guo
  • Li-Li Zhang
  • Bo Zheng
  • Yun Liu
  • Xiao-Jie Cao
  • Yan Pi
  • Bing-Hu Li
  • Jing-Cheng Li

Abstract

Objective: Several epidemiological studies have evaluated the association between the GNB3 C825T polymorphism and hypertension or stroke. The results of these studies were inconsistent; therefore, we performed a meta-analysis to clarify these discrepancies. Methods: We systematically searched the PubMed, Embase, Web of Science, CNKI, and CBM databases, and manually searched reference lists of relevant papers, meeting abstracts, and relevant journals. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated for dominant, recessive, and allelic models. A fixed or random effects model was separately adopted depending on study heterogeneity. Subgroup and sensitivity analyses were performed to detect study heterogeneity and examine result stability, respectively. Publication bias was tested using funnel plots, the Egger's regression test, and Begg's test. Results: We screened 66 studies regarding hypertension and eight concerning stroke. A combined analysis showed that only the allelic model found a marginal association with hypertension (OR = 1.07, 95% CI = 1.01–1.13) and female gender (OR = 1.11, 95% CI = 0.99–1.24). However, no comparison models found an association with stroke (allelic model: OR = 1.11, 95% CI = 0.94–1.32; dominant model: OR = 1.16, 95% CI = 0.92–1.48; and recessive model: OR = 1.05, 95% CI = 0.97–1.14). Sensitivity analysis suggested that all models did not yield a relationship to hypertension or stroke among Asians. Besides, there was a lack of statistical association with hypertension in Caucasians, which maybe due to a small sample size. When we restricted the included studies to normal populations according to the Hardy–Weinberg equilibrium, no association was found. Conclusions: There was no evidence indicating that the 825T allele or TT genotype was associated with hypertension or stroke in Asians or hypertension in Caucasians. However, further studies regarding Africans and other ethnicities are needed to identify further correlations.

Suggested Citation

  • Lu Guo & Li-Li Zhang & Bo Zheng & Yun Liu & Xiao-Jie Cao & Yan Pi & Bing-Hu Li & Jing-Cheng Li, 2013. "The C825T Polymorphism of the G-Protein β3 Subunit Gene and Its Association with Hypertension and Stroke: An Updated Meta-Analysis," PLOS ONE, Public Library of Science, vol. 8(6), pages 1-13, June.
  • Handle: RePEc:plo:pone00:0065863
    DOI: 10.1371/journal.pone.0065863
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    References listed on IDEAS

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    1. Wenquan Niu & Yue Qi, 2011. "Association of α-Adducin and G-Protein β3 Genetic Polymorphisms with Hypertension: A Meta-Analysis of Chinese Populations," PLOS ONE, Public Library of Science, vol. 6(2), pages 1-7, February.
    2. Zhenglun Pan & Thomas A Trikalinos & Fotini K Kavvoura & Joseph Lau & John PA Ioannidis, 2005. "Local Literature Bias in Genetic Epidemiology: An Empirical Evaluation of the Chinese Literature," PLOS Medicine, Public Library of Science, vol. 2(12), pages 1-1, November.
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