title: A meta-analysis of the associations between the Q141K and Q126X ABCG2 gene variants and gout risk.
abstract: BACKGROUND
  Gout is an inflammatory disease in which genetic factors play a role. ABCG2 is a urate transporter, and the Q141K and Q126X variants of ABCG2 have been associated with a risk of developing gout, though previous studies of these associations have been inconsistent. Therefore, we conducted a meta-analysis to explore the relationship between these genetic variants and gout.
  
  
  METHODS
  We examined 8 electronic literature databases. In total, 9 eligible articles on the associations between the Q141K (rs2231142) and Q126X (rs72552713) variants and gout risk, including 11 case-control studies were selected. We used odds ratios (OR) and 95% confidence intervals (CI) to assess the strength of these relationships in dominant, recessive, and co-dominant models.
  
  
  RESULTS
  This study included 6652 participants (2499 gout patients and 4153 controls). The Q141K variant was found to significantly increase the risk of gout in Asians (dominant model: OR=2.64, 95% CI=2.04-3.43, P=0.02 for heterogeneity; recessive model: OR=3.19, 95% CI=2.56-3.97, P=0.28 for heterogeneity; co-dominant model: OR=1.37, 95% CI=1.18-1.59, P=0.09 for heterogeneity) and other populations (dominant model: OR=1.85, 95% CI=1.20-2.85, P<0.0001 for heterogeneity; recessive model: OR=3.78, 95% CI=2.28-6.27, P=0.19 for heterogeneity; co-dominant model: OR=1.48, 95% CI=1.26-1.74, P=0.19 for heterogeneity). The Q126X variant also significantly increased the risk of gout in Asians (dominant model: OR=3.87, 95% CI=2.07-7.24, P=0.06 for heterogeneity).
  
  
  CONCLUSIONS
  These results suggest associations between the rs2231142 and rs72552713 ABCG2 gene polymorphisms and gout risk, which led to unfavorable outcomes. However, studies with larger sample sizes and homogeneous populations should be performed to confirm these results.
authors.affiliation: School of Public Health, Xinjiang Medical University Urumqi, Xinjiang, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Li
authors.affiliation: School of Public Health, Xinjiang Medical University Urumqi, Xinjiang, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Miao
authors.affiliation: School of Public Health, Xinjiang Medical University Urumqi, Xinjiang, China.
authors.forename: Liyan
authors.initials: L
authors.lastname: Qin
authors.affiliation: School of Public Health, Xinjiang Medical University Urumqi, Xinjiang, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Xiang
authors.affiliation: The First Affiliated Hospital of Xinjiang Medical University Urumqi, Xinjiang, China.
authors.forename: Xiaojin
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Clinical Laboratory, Traditional Chinese Medical Hospital of Xinjiang Uygur Autonomous Region Urumqi, Xinjiang, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Peng
authors.affiliation: School of Public Health, Xinjiang Medical University Urumqi, Xinjiang, China.
authors.lastname: Mailamuguli
authors.affiliation: School of Basic Medical Sciences, Xinjiang Medical University Urumqi, Xinjiang, China.
authors.forename: Yuping
authors.initials: Y
authors.lastname: Sun
authors.affiliation: The First Affiliated Hospital of Xinjiang Medical University Urumqi, Xinjiang, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Yao
mesh_terms: D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters / Q000235:genetics*; D044466:Asian People / Q000235:genetics; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D006073:Gout / Q000235:genetics*; D006801:Humans; D009363:Neoplasm Proteins / Q000235:genetics*; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*
chemical_list: C116614:ABCG2 protein, human; D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters; D009363:Neoplasm Proteins
keywords: Gout; Q126X; Q141K; meta-analysis; single nucleotide polymorphism