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Petroff, Rebekah L.; Dolinoy, Dana C.; Wang, Kai; Montrose, Luke; Padmanabhan, Vasantha; Peterson, Karen E.; Ruden, Douglas M.; Sartor, Maureen A.; Svoboda, Laurie K.; Téllez-Rojo, Martha M.; Goodrich, Jaclyn M.
Environment international, April 2024, 2024-Apr, 2024-04-00, 20240401, 2024-04-01, Volume: 186Journal Article
Display omitted •Translational research is limited in environmental toxicology and epidemiology.•Perinatal DEHP and Pb exposure induces epigenetic (DNA methylation) changes in mice.•Homologous human gene methylation is altered after prenatal DEHP and Pb exposure.•Translational toxicoepigenetics can identify consistent cross-species effects. Although toxicology uses animal models to represent real-world human health scenarios, a critical translational gap between laboratory-based studies and epidemiology remains. In this study, we aimed to understand the toxicoepigenetic effects on DNA methylation after developmental exposure to two common toxicants, the phthalate di(2-ethylhexyl) phthalate (DEHP) and the metal lead (Pb), using a translational paradigm that selected candidate genes from a mouse study and assessed them in four human birth cohorts. Data from mouse offspring developmentally exposed to DEHP, Pb, or control were used to identify genes with sex-specific sites with differential DNA methylation at postnatal day 21. Associations of human infant DNA methylation in homologous mouse genes with prenatal DEHP or Pb were examined with a meta-analysis. Differential methylation was observed on 6 cytosines (adjusted-p < 0.05) and 90 regions (adjusted-p < 0.001). This translational approach offers a unique method that can detect conserved epigenetic differences that are developmentally susceptible to environmental toxicants.
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