title: Association between ErbB4 single nucleotide polymorphisms and susceptibility to schizophrenia: A meta-analysis of case-control studies.
abstract: BACKGROUND
  Accumulating studies have reported inconsistent association between ErbB4 single nucleotide polymorphisms (SNPs) and predisposition to schizophrenia. To better interpret this issue, here we conducted a meta-analysis using published case-control studies.
  
  
  METHODS
  We conducted a systematic search of MEDLINE (Pubmed), Embase (Ovid), Web of Science (Thomson-Reuters) to identify relevant references. The association between ErbB4 SNPs and schizophrenia was assessed by odds ratios (ORs) and 95% confidence intervals (CIs). Between-study heterogeneity was evaluated by I squared (I) statistics and Cochran's Q test. To appraise the stability of results, we employed sensitivity analysis by omitting 1 single study each time. To assess the potential publication bias, we conducted trim and fill analysis.
  
  
  RESULTS
  Seven studies published in English comprising 3162 cases and 4264 controls were included in this meta-analysis. Meta-analyses showed that rs707284 is statistically significantly associated with schizophrenia susceptibility among Asian and Caucasian populations under the allelic model (OR = 0.91, 95% CI: 0.83-0.99, P = 0.035). Additionally, a marginal association (P < 0.1) was observed between rs707284 and schizophrenia risk among Asian and Caucasian populations under the recessive (OR = 0.85, 95% CI: 0.72-1.01, P = 0.065) and homozygous (OR = 0.84, 95% CI: 0.68-1.03, P = 0.094) models. In the Asian subgroup, rs707284 was also noted to be marginally associated with schizophrenia under the recessive model (OR = 0.84, 95% CI: 0.70-1.00, P = 0.053). However, no statistically significant association was found between rs839523, rs7598440, rs3748962, and rs2371276 and schizophrenia risk.
  
  
  CONCLUSIONS
  This meta-analysis suggested that rs707284 may be a potential ErbB4 SNP associated with susceptibility to schizophrenia. Nevertheless, due to the limited sample size in this meta-analysis, more large-scale association studies are still needed to confirm the results.
authors.affiliation: Department of Psychiatry, Henan Mental Hospital, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
authors.forename: Yanguo
authors.initials: Y
authors.lastname: Feng
authors.forename: Dejun
authors.initials: D
authors.lastname: Cheng
authors.forename: Chaofeng
authors.initials: C
authors.lastname: Zhang
authors.forename: Yuchun
authors.initials: Y
authors.lastname: Li
authors.forename: Zhiying
authors.initials: Z
authors.lastname: Zhang
authors.forename: Juan
authors.initials: J
authors.lastname: Wang
authors.forename: Xiao
authors.initials: X
authors.lastname: Feng
mesh_terms: D044466:Asian People / Q000235:genetics; D020022:Genetic Predisposition to Disease; D006801:Humans; D020641:Polymorphism, Single Nucleotide; D066247:Receptor, ErbB-4 / Q000235:genetics*; D012559:Schizophrenia / Q000208:ethnology / Q000235:genetics*; D044465:White People / Q000235:genetics
chemical_list: C587689:ERBB4 protein, human; D066247:Receptor, ErbB-4