title: Glutathione S-transferase M1 and T1 gene polymorphism and COPD risk in smokers: an updated analysis.
abstract: We evaluated the association between GSTM1 and GSTT1 gene polymorphisms and susceptibility to chronic obstructive pulmonary disease (COPD) in smokers. A meta-analysis of the published case-control studies was performed. Published literature was retrieved from PubMed, EMBASE, and China National Knowledge Infrastructure (CNKI), with last update in February, 2011. Data were extracted and a fixed- or random-effects model was used to calculate pooled odds ratios with 95% confidence intervals depending on statistical heterogeneity. Fourteen eligible studies, comprising 1,665 COPD cases and 1,614 controls, were included in the meta-analysis. The combined analyses showed that there was a significant difference in GSTM1 genotype distribution between COPD cases and controls among Caucasians, but not among Asians. The combined GSTM1/GSTT1 null genotype conferred a 1.36-fold greater risk for COPD in Asian smokers. The GSTT1 null genotype alone was not associated with enhanced risk for COPD. The GSTM1 null genotype is significantly associated with an increasing susceptibility to COPD in Caucasian smokers, but not in Asian smokers. The GSTM1/GSTT1 null genotype is a significant risk factor for developing COPD in Asian smokers. The GSTT1 null genotype, however, was not associated with COPD.
authors.affiliation: Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing, 210029, Jiangsu, People's Republic of China.
authors.forename: Hong
authors.initials: H
authors.lastname: Xue
authors.forename: Jian
authors.initials: J
authors.lastname: Su
authors.forename: Kai
authors.initials: K
authors.lastname: Sun
authors.forename: Weiping
authors.initials: W
authors.lastname: Xie
authors.forename: Hong
authors.initials: H
authors.lastname: Wang
mesh_terms: D044466:Asian People / Q000235:genetics; D016001:Confidence Intervals; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D017594:Publication Bias; D029424:Pulmonary Disease, Chronic Obstructive / Q000201:enzymology* / Q000235:genetics*; D012307:Risk Factors; D012907:Smoking / Q000235:genetics*; D044465:White People / Q000235:genetics
chemical_list: D005982:Glutathione Transferase; C413545:glutathione S-transferase T1