Tobacco smoking-associated genome-wide DNA methylation changes in the EPIC study
Publication date
2016-05-01
Authors
Ambatipudi, Srikant
Cuenin, Cyrille
Hernandez-Vargas, Hector
Ghantous, Akram
Le Calvez-Kelm, Florence
Kaaks, Rudolf
Barrdahl, Myrto
Boeing, Heiner
Aleksandrova, Krasimira
Trichopoulou, Antonia
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Document Type
Article
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Abstract
Aim: Epigenetic changes may occur in response to environmental stressors, and an altered epigenome pattern may represent a stable signature of environmental exposure. Materials & methods: Here, we examined the potential of DNA methylation changes in 910 prediagnostic peripheral blood samples as a marker of exposure to tobacco smoke in a large multinational cohort. Results: We identified 748 CpG sites that were differentially methylated between smokers and nonsmokers, among which we identified novel regionally clustered CpGs associated with active smoking. Importantly, we found a marked reversibility of methylation changes after smoking cessation, although specific genes remained differentially methylated up to 22 years after cessation. Conclusion: Our study has comprehensively cataloged the smoking-associated DNA methylation alterations and showed that these alterations are reversible after smoking cessation.
Keywords
DNA methylome, epigenetic signature, prospective cohort, tobacco smoking, Genetics, Cancer Research, Journal Article
Citation
Ambatipudi, S, Cuenin, C, Hernandez-Vargas, H, Ghantous, A, Le Calvez-Kelm, F, Kaaks, R, Barrdahl, M, Boeing, H, Aleksandrova, K, Trichopoulou, A, Lagiou, P, Naska, A, Palli, D, Krogh, V, Polidoro, S, Tumino, R, Panico, S, Bueno-De-Mesquita, B, Peeters, P HM, Quirós, J R, Navarro, C, Ardanaz, E, Dorronsoro, M, Key, T, Vineis, P, Murphy, N, Riboli, E, Romieu, I & Herceg, Z 2016, 'Tobacco smoking-associated genome-wide DNA methylation changes in the EPIC study', Epigenomics, vol. 8, no. 5, pp. 599-618. https://doi.org/10.2217/epi-2016-0001