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Meta-Analysis
. 2014 Jun 24;9(6):e100489.
doi: 10.1371/journal.pone.0100489. eCollection 2014.

Association of Gln27Glu and Arg16Gly polymorphisms in Beta2-adrenergic receptor gene with obesity susceptibility: a meta-analysis

Hongxiu Zhang  1 , Jie Wu  2 , Lipeng Yu  3
Affiliations
Meta-Analysis

Association of Gln27Glu and Arg16Gly polymorphisms in Beta2-adrenergic receptor gene with obesity susceptibility: a meta-analysis

Hongxiu Zhang et al. PLoS One. .

Abstract

Background: The beta2-adrenergic receptor (ADRB2) gene polymorphism has been implicated in susceptibility to obesity, but study results are still controversial.

Objective: The present meta-analysis is performed to determine whether there are any associations between the Gln27Glu (rs1042714) or the Arg16Gly (rs1042713) polymorphisms in ADRB2 and obesity susceptibility.

Methods: The PubMed (1950-2014), Embase (1974-2014), and China National Knowledge Infrastructure (CNKI, 1994-2014) databases were searched using the search terms ("Beta2-adrenergic receptor", "β2-adrenergic receptor" or "ADRB2"), "polymorphism," and "obesity". Fixed- or random-effects pooled measures were determined on the bias of heterogeneity tests across studies. Publication bias was examined by Egger's test and the modified Begg's test.

Results: Eighteen published articles were selected for meta-analysis. Overall analyses showed that rs1042714 (Gln27Glu) was associated with significantly increased obesity risk in the heterozygote model (Gln/Glu vs. Gln/Gln: OR: 1.16, 95% CI: 1.04-1.30, I2 = 49%, P = 0.009) and the dominant model (Gln/Glu + Glu/Glu vs. Gln/Gln: OR: 1.2, 95% CI: 1.00-1.44, I2 = 55%, P = 0.04), whereas no significant association was found in the other models for rs1042714. Also, no significant association was found between the rs1042713 (Arg16Gly) gene polymorphism and the risk of obesity in all genetic models. In addition, neither rs1042713 (Arg16Gly) nor rs1042714 (Gln27Glu) showed any significant association with obesity susceptibility when the population were stratified based on gender.

Conclusion: Our meta-analysis revealed that the rs1042714 (Gln27Glu) polymorphism is associated with obesity susceptibility. However, our results do not support an association between rs1042713 (Arg16Gly) polymorphisms and obesity in the populations investigated. This conclusion warrants confirmation by more case-control and cohort studies.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Figure 1
Figure 1. Flow diagram of articles selection process for ADRB2 gene polymorphism and obesity risk.
Figure 2
Figure 2. Association between rs1042714 (Gln27Glu) gene polymorphism and obesity risk under heterozygote model.
(Gln/Glu vs. Gln/Gln: OR: 1.16, 95% CI: 1.04–1.30, I 2 = 49%, P = 0.009).
Figure 3
Figure 3. Association between rs1042714 (Gln27Glu) gene polymorphism and obesity risk under dominant model.
(Gln/Glu + Glu/Glu vs. Gln/Gln: OR: 1.2, 95% CI: 1.00–1.44, I 2 = 55%, P = 0.04).
Figure 4
Figure 4. Funnel plot for rs1042714 (Gln27Glu) gene polymorphism on heterozygote Gln/Glu vs.
Gln/Gln. The funnel plot showed no apparent evidence of publication bias.
See this image and copyright information in PMC

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