title: Association between Peroxisome Proliferator-activated Receptor Gamma Gene Polymorphisms and Atherosclerotic Diseases: A Meta-analysis of Case-control Studies.
abstract: OBJECTIVE
  The aim of this study was to perform a meta-analysis to investigate the association between PPARγ rs1801282/rs3856806 polymorphisms and atherosclerotic diseases.
  
  
  METHODS
  The meta-analysis was performed by searching the PubMed, Embase and Web of Science databases from the first available year to September 10, 2013. Additionally, reference lists from the identified articles, reviews and abstracts presented at the meetings of related scientific societies were also checked. All case-control studies investigating the association between PPARγ rs1801282/rs3856806 polymorphisms and the risk of atherosclerotic disease were included. The association was assessed according to the odds ratio (OR) with a 95% confidence interval (CI). Publication bias was analyzed using Begg's funnel plot and Egger's regression test.
  
  
  RESULTS
  A total of 29 studies reporting PPARγ rs1801282/rs3856806 polymorphism were included in the final meta-analysis. Neither the rs1801282 (Pro12Ala) nor rs3856806 (C161T) polymorphisms showed any significant associations with susceptibility to atherosclerotic diseases. In the meta-analysis performed to assess the association between the rs3856806 gene polymorphism and atherosclerotic disease based on ethnicity and the type of disease, significant associations were found in the Caucasian subgroup, Asian, CAD and MI subgroups.
  
  
  CONCLUSIONS
  The present data suggest that there is no statistical evidence of a significant association between the PPARγ gene rs1801282/rs3856806 polymorphism and the risk of atherosclerotic disease. In contrast, the rs3856806 polymorphism was associated with an increased risk in the Caucasian and MI subgroups, whereas decreased risks were noted in the Asian and CAD subgroups. Due to significant between-study heterogeneity, further studies with a larger sample size involving homogeneous AS patients and well-matched controls are required in the future.
authors.affiliation: Department of Cardiology, The First Affiliated Hospital, Chengdu Medical College.
authors.forename: Peijian
authors.initials: P
authors.lastname: Wang
authors.forename: Qiulin
authors.initials: Q
authors.lastname: Wang
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Yin
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yang
authors.forename: Wenzhang
authors.initials: W
authors.lastname: Li
authors.forename: Dengpan
authors.initials: D
authors.lastname: Liang
authors.forename: Peng
authors.initials: P
authors.lastname: Zhou
mesh_terms: D000483:Alleles; D044466:Asian People; D050197:Atherosclerosis / Q000208:ethnology / Q000235:genetics* / Q000503:physiopathology; D016022:Case-Control Studies; D003324:Coronary Artery Disease / Q000235:genetics; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D009203:Myocardial Infarction / Q000235:genetics; D016017:Odds Ratio; D047495:PPAR gamma / Q000235:genetics*; D011110:Polymorphism, Genetic; D020641:Polymorphism, Single Nucleotide; D044465:White People
chemical_list: D047495:PPAR gamma