An increased risk of differentiated thyroid carcinoma in Iran with the 677C→T homozygous polymorphism in the MTHFR Gene

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Abstract

Background: Methylenetetrahydrofolate reductase (MTHFR) involves in folic acid metabolism which influences DNA methylation. A single nucleotide polymorphism (SNP) called 677C→T in MTHFR gene causes producing a thermolabile enzyme with reducing function and eventually defects DNA methylation. To determine association between germ-line polymorphism in MTHFR gene with differentiated thyroid carcinoma (DTC), this preliminary study was designed. Methods: This was a case-control study of 154 DTC patients and 198 cancer free individuals. Genotyping was performed by a multiplex PCR method and the frequencies of the 677C→T SNP in cases and controls were compared. The risk estimation was done by multivariate logistic regression analysis. Results: Compared to CC genotype, an increased risk of DTC for the 677C→T homozygous genotype was demonstrated (odds ratio [OR]: 2.08, 95% confidence interval [CI]: 0.82-5.25). Also, multivariate analysis demonstrated an increased risk of DTC in recessive fashion (TT vs. CC or CT) (OR: 2.38, 95% CI: 0.97-5.82). Conclusion: The MTHFR 677C→T homozygous variant allele may be associated with increased risk of DTC. © 2010 Elsevier Ltd.

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Fard-Esfahani, P., Fard-Esfahani, A., Saidi, P., Fayaz, S., Mohabati, R., & Majdi, M. (2011). An increased risk of differentiated thyroid carcinoma in Iran with the 677C→T homozygous polymorphism in the MTHFR Gene. Cancer Epidemiology, 35(1), 56–58. https://doi.org/10.1016/j.canep.2010.10.001

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