The MPO-463G>A polymorphism and lung cancer risk: a meta-analysis based on 22 case-control studies.

ABSTRACT:

Background

Myeloperoxidase (MPO) is an endogenous oxidant enzyme that produces reactive oxygen species (ROS) and may be involved in lung carcinogenesis. The MPO-463G>A polymorphism influences MPO transcription and has been associated with lung cancer susceptibility. However, the association between the MPO-463G>A polymorphism and lung cancer risk remains controversial.

Method

To investigate the effect of this polymorphism on lung cancer susceptibility, we performed a meta-analysis based on 22 published case-control studies including 7,520 patients with lung cancer and 8,600 controls. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to assess the strength of the association.

Results

Overall, there was no evidence for significant association between MPO-463G>A polymorphism and lung cancer susceptibility (for AA versus GG: OR?=?0.91, 95%CI?=?0.67-1.24; for GA versus GG: OR?=?0.87, 95% CI?=?0.78-0.98; for AA/GA versus GG: OR?=?0.90, 95% CI?=?0.80-1.01; for AA versus

Ga/gg

OR?=?0.96, 95% CI?=?0.72-1.28). In the stratified analyses by ethnicity, source of controls and smoking status, we also did not find any significant association between them.

Conclusions

In summary, this meta-analysis suggests MPO-463G>A polymorphism may not be a risk factor for developing lung cancer. However, further prospective well-designed population-based studies with larger sample size are expected to validate the results.

SUBMITTER: Yang JP 

PROVIDER: S-EPMC3688689 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature