Effects of the NQO1 609C>T Polymorphism on Leukemia Susceptibility: Evidence from a Meta-analysis

  • Han, Fei-Fei (Beijing Chao-Yang Hospital Affiliated with Beijing Capital Medical University) ;
  • Guo, Chang-Long (Reproductive and Genetic Center of National Research Institute for Family Planning) ;
  • Gong, Li-Li (Beijing Chao-Yang Hospital Affiliated with Beijing Capital Medical University) ;
  • Jin, Zhu (Beijing Chao-Yang Hospital Affiliated with Beijing Capital Medical University) ;
  • Liu, Li-Hong (Beijing Chao-Yang Hospital Affiliated with Beijing Capital Medical University)
  • Published : 2013.09.30


A functional polymorphism in the NQO1 gene, featuring a 609C>T substitution,leading to proline to serine amino-acid and enzyme activity changes, has been implicated in cancer risk. However, individually published investigations showed inconclusive results, especially for leukemia. In this study, we therefore performed a meta-analysis of 21 publications with a total of 3,634 cases and 4,827controls, mainly for leukemia. We summarized the data on the association between the NQO1 609C>T polymorphism and risk of leukemia and performed subgroup analyses by ethnicity and leukemia type. We found that the variant TT homozygous genotype o was associated with a modestly increased risk of leukemia (TT versus CT/CC: OR=1.23, 95%CI=1.00-1.51, heterogeneity=0.76; $I^2$=0%). Following further stratified analyses, increased risk was only observed in subgroups of Caucasians. This meta-analysis suggests that the NQO1 609T allele is a high-penetrance risk factor for leukemia in Caucasians. The effect on leukemia may be modified by ethnicity and leukemia type, and the small sample sizes of the subgroup analyses suggest that further larger studies are needed.


NQO1 609C>T polymorphism;leukemia;meta-analysis


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