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Title: 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
Author: Lonjou, Christine
Damiola, Francesca
Moissonnier, Monika
Durand, Geoffroy
Malakhova, Irina
Masyakin, Vladimir
Le Calvez-Kelm, Florence
Cardis, Elisabeth
Byrnes, Graham
Kesminiene, Ausrele
Lesueur, Fabienne
Keywords: Efectes fisiològics de les radiacions
Physiological effects of radiation
Thyroid gland
Issue Date: 12-May-2017
Publisher: Biomed Central
Abstract: BACKGROUND: 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.
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It is part of: BMC Cancer, 2017, vol. 17, num. 1, p. 328
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ISSN: 1471-2407
Appears in Collections:Articles publicats en revistes (ISGlobal)

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