Lonjou, ChristineDamiola, FrancescaMoissonnier, MonikaDurand, GeoffroyMalakhova, IrinaMasyakin, VladimirLe Calvez-Kelm, FlorenceCardis, ElisabethByrnes, GrahamKesminiene, AusreleLesueur, Fabienne2018-04-122018-04-122017Lonjou C, Damiola F, Moissonnier M, Durand G, Malakhova I, Masyakin V. et al. Investigation of DNA repair-related SNPs underlying susceptibility to papillary thyroid carcinoma reveals MGMT as a novel candidate gene in Belarusian children exposed to radiation.BMC Cancer. 2017 May 12;17(1):328. DOI: 10.1186/s12885-017-3314-51471-2407http://hdl.handle.net/10230/34341BACKGROUND: Genetic factors may influence an individual's sensitivity to ionising radiation and therefore modify his/her risk of developing papillary thyroid carcinoma (PTC). Previously, we reported that common single nucleotide polymorphisms (SNPs) within the DNA damage recognition gene ATM contribute to PTC risk in Belarusian children exposed to fallout from the Chernobyl power plant accident. Here we explored in the same population the contribution of a panel of DNA repair-related SNPs in genes acting downstream of ATM. METHODS: The association of 141 SNPs located in 43 DNA repair genes was examined in 75 PTC cases and 254 controls from the Gomel region in Belarus. All subjects were younger than 15 years at the time of the Chernobyl accident. Conditional logistic regressions accounting for radiation dose were performed with PLINK using the additive allelic inheritance model, and a linkage disequilibrium (LD)-based Bonferroni correction was used for correction for multiple testing. RESULTS: The intronic SNP rs2296675 in MGMT was associated with an increased PTC risk [per minor allele odds ratio (OR) 2.54 95% CI 1.50, 4.30, P per allele = 0.0006, P corr.= 0.05], and gene-wide association testing highlighted a possible role for ERCC5 (P Gene = 0.01) and PCNA (P Gene = 0.05) in addition to MGMT (P Gene = 0.008). CONCLUSIONS: These findings indicate that several genes acting in distinct DNA repair mechanisms contribute to PTC risk. Further investigation is needed to decipher the functional properties of the methyltransferase encoded by MGMT and to understand how alteration of such functions may lead to the development of the most common type of thyroid cancer.application/pdfeng© This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.Radiació -- Efectes fisiològics -- InfantsTiroide -- Càncer -- Aspectes molecularsADN -- Reparacióinfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1186/s12885-017-3314-5DNA repairGenetic susceptibilityMGMTPapillary thyroid carcinomaRadiation-induced cancerinfo:eu-repo/semantics/openAccess