Association of Methylenetetrahydrofolate reductase genetic polymorphisms and folate intake with susceptibility of esophageal squamous cell carcinoma: A meta-analysis

Abstract

Objectives: We conducted an update meta-analysis to investigate the association of MTHFR C677T and folate intake with esophageal cancer risk.Methodology: PubMed, EMBASE and the CNKI were searched in our study. The pooled Odds ratio (ORs) and 95% confidence intervals (CIs) of MTHFR C677T and folate intake and ESCC risk from each study were pooled using meta-analysis.Results: Twenty studies (4271 cases and 5559 controls) were included for meta-analysis. MTHFR 677 CT and TT genotypes were associated with an increased risk of ESCC, with OR(95%CI) of 1.48(1.25-1.77) and 1.65(1.24-2.20). By subgroup analysis, we found individuals carrying CT+TT genotype and low intake of folate had an increased risk of ESCC risk when compared with CC genotype [OR(95CI%)=1.55(1.02-2.57)]. There was a significant interaction between folate intake and ESCC. No publication bias was found among studies regarding MTHFR 677 CT and TT by Egger’s test.Conclusions: Our meta-analysis indicated MTHFR 677CT and/or TT genotypes are associated with the risk of ESCC, and folate could modify their association.doi: http://dx.doi.org/10.12669/pjms.292.2928How to cite this:Shujuan Y, Yuanyuan W, Jianxing Z, Xin-yue C. Association of Methylenetetrahydrofolate reductase genetic polymorphisms and folate intake with susceptibility of esophageal squamous cell carcinoma: A meta-analysis. Pak J Med Sci 2013;29(2):693-698. doi: http://dx.doi.org/10.12669/pjms.292.2928This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.