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Exploratory analysis of the human breast DNA methylation profile upon soymilk exposure

Louis Coussement (UGent) , Selin Bolca (UGent) , Wim Van Criekinge (UGent) , Geert Trooskens (UGent) , Klaas Mensaert (UGent) , Katrien Poels, Nathalie Roche (UGent) , Phillip Blondeel (UGent) , Lode Godderis, Herman Depypere (UGent) , et al.
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Abstract
Upon soy consumption, isoflavone metabolites attain bioactive concentrations in breast tissue possibly affecting health. Though in vitro epigenetic activity of soy metabolites has been described, the in vivo impact on the epigenome is largely unknown. Therefore, in this case-control study, the breast glandular tissue DNA methylome was explored in women undergoing an aesthetic breast reduction. After a run-in phase, 10 generally healthy Belgian or Dutch women received soymilk for 5 days. MethylCap-seq methylation profiles were compared with those of 10 matched controls. Isoflavones and their microbial metabolites were quantified in urine, serum, and glandular breast tissue (liquid chromatography-mass spectrometry) and 17 beta-estradiol in glandular breast tissue (immunoassay). Global DNA methylation levels were obtained for 6 cases and 5 controls using liquid chromatography-mass spectrometry. Although lower MethylCap-seq coverages were observed, mass spectrometry results and computational LINE-1 methylation analysis did not provide evidence supporting global methylation alterations upon treatment. At a false discovery rate of 0.05, no differentially methylated loci were identified. Moreover, a set of previously identified loci was specifically tested, but earlier reported results could not be validated. In conclusion, after a 5-day soymilk treatment, no major general epigenetic reprogramming in breast tissue could be found in this exploratory study.
Keywords
CANCER-CELLS, POSTMENOPAUSAL WOMEN, SOY ISOFLAVONES, PATHWAY, HYPOMETHYLATION, EXCRETION, TUMOR

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Chicago
Coussement, Louis, Selin Bolca, Wim Van Criekinge, Geert Trooskens, Klaas Mensaert, Katrien Poels, Nathalie Roche, et al. 2018. “Exploratory Analysis of the Human Breast DNA Methylation Profile Upon Soymilk Exposure.” Scientific Reports 8.
APA
Coussement, L., Bolca, S., Van Criekinge, W., Trooskens, G., Mensaert, K., Poels, K., Roche, N., et al. (2018). Exploratory analysis of the human breast DNA methylation profile upon soymilk exposure. SCIENTIFIC REPORTS, 8.
Vancouver
1.
Coussement L, Bolca S, Van Criekinge W, Trooskens G, Mensaert K, Poels K, et al. Exploratory analysis of the human breast DNA methylation profile upon soymilk exposure. SCIENTIFIC REPORTS. 2018;8.
MLA
Coussement, Louis, Selin Bolca, Wim Van Criekinge, et al. “Exploratory Analysis of the Human Breast DNA Methylation Profile Upon Soymilk Exposure.” SCIENTIFIC REPORTS 8 (2018): n. pag. Print.
@article{8575166,
  abstract     = {Upon soy consumption, isoflavone metabolites attain bioactive concentrations in breast tissue possibly affecting health. Though in vitro epigenetic activity of soy metabolites has been described, the in vivo impact on the epigenome is largely unknown. Therefore, in this case-control study, the breast glandular tissue DNA methylome was explored in women undergoing an aesthetic breast reduction. After a run-in phase, 10 generally healthy Belgian or Dutch women received soymilk for 5 days. MethylCap-seq methylation profiles were compared with those of 10 matched controls. Isoflavones and their microbial metabolites were quantified in urine, serum, and glandular breast tissue (liquid chromatography-mass spectrometry) and 17 beta-estradiol in glandular breast tissue (immunoassay). Global DNA methylation levels were obtained for 6 cases and 5 controls using liquid chromatography-mass spectrometry. Although lower MethylCap-seq coverages were observed, mass spectrometry results and computational LINE-1 methylation analysis did not provide evidence supporting global methylation alterations upon treatment. At a false discovery rate of 0.05, no differentially methylated loci were identified. Moreover, a set of previously identified loci was specifically tested, but earlier reported results could not be validated. In conclusion, after a 5-day soymilk treatment, no major general epigenetic reprogramming in breast tissue could be found in this exploratory study.},
  articleno    = {13617},
  author       = {Coussement, Louis and Bolca, Selin and Van Criekinge, Wim and Trooskens, Geert and Mensaert, Klaas and Poels, Katrien and Roche, Nathalie and Blondeel, Phillip and Godderis, Lode and Depypere, Herman and De Meyer, Tim},
  issn         = {2045-2322},
  journal      = {SCIENTIFIC REPORTS},
  language     = {eng},
  pages        = {11},
  title        = {Exploratory analysis of the human breast DNA methylation profile upon soymilk exposure},
  url          = {http://dx.doi.org/10.1038/s41598-018-31767-x},
  volume       = {8},
  year         = {2018},
}

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