title: Null Glutathione S-transferase T1 and M1 genotypes and oral cancer susceptibility in China and India--a meta-analysis.
abstract: OBJECTIVE
  Genetic variation is considered to strongly impact on detoxification of carcinogens and therefore is related to cancer risk. However, findings for the null genotypes of GSTT1 and GSTM1 have not always been consistent. Therefore the present meta-analysis was conducted.
  
  
  METHODS
  We accessed the reported study at different research areas and used various databases, including PubMed and Wanfang Med Onlion from 1990 to May 1st 2013. We calculated the odds ratio (OR), 95% confidence interval (CI) and P value for oral cancer by using Review Manager 5.1 and STATE 12.
  
  
  RESULTS
  We found that there was no increased oral cancer risk among subjects carrying GSTM1 and GSTT1 null genotype (OR=1.35, 95%CI=0.68-2.68, P=0.39) and (OR=1.41, 95%CI=0.72-2.77, P=0.31) in the Chinese population. In contrast, in studies in India a significant correlation between GSTM1 null genotype and oral cancer was observed (OR=1.59, 95%CI=1.20-2.11, P=0.001), but not in GSTT1 (OR=1.21, 95% CI = 0.84-1.74, P=0.31).
  
  
  CONCLUSIONS
  We discovered that GSTM1 deletion polymorphism had a significant effect on the susceptibility of oral cancer in the Indian population.
authors: Clinical Department of Stomatology, Zhongnan Hospital of Wuhan University, Wuhan, China E-mail : zhuyoujia1954@sina.com.
authors: Jie
authors: J
authors: Peng
authors: Hong-Zhou
authors: HZ
authors: Liu
authors: You-Jia
authors: YJ
authors: Zhu
mesh_terms: D002681:China; D020022:Genetic Predisposition to Disease; D005838:Genotype; D005982:Glutathione Transferase / Q000235:genetics*; D006801:Humans; D007194:India; D009062:Mouth Neoplasms / Q000235:genetics*
chemical_list: D005982:Glutathione Transferase; C413545:glutathione S-transferase T1