CYP1A1 MspI polymorphisms and lung cancer risk: an updated meta-analysis involving 20,209 subjects

Cytokine
Ya-nan JiLi-jun Suo

Abstract

Published data describing the association between CYP1A1 MspI gene polymorphism and lung cancer risk are inconclusive. To determine a more conclusive relationship, we performed an updated meta-analysis of all eligible studies and conducted the subgroup analysis by stratification according to the ethnicity source, histological types of lung cancer, gender and smoking status of case and control populations. A total of 51 studies comprising 20,209 subjects were included in the analysis. A significantly elevated lung cancer risk was associated with two variant genotypes (for TT vs CC: OR=1.24, 95% CI=1.11-1.40; for CT and TT combined vs CC: OR=1.19, 95% CI=1.12-1.27) in the overall population. In the stratified analysis, significantly higher risks associated with lung cancer were found in Asians, Caucasians, lung SCC, lung AC and the male population. In contrast, negligible risks were found in the mixed population, lung SCLC and the female population. Additionally, a significant association was found in the smoker population, whereas no association was found in non-smoker populations. This meta-analysis suggests that the MspI polymorphisms of CYP1A1 correlate with increased lung cancer susceptibility, and that there is an interacti...Continue Reading

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