Selective Survival of Embryos Can Explain DNA Methylation Signatures of Adverse Prenatal Environments

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

An adverse intrauterine environment is associated with long-term physiological changes in offspring. These are believed to be mediated by epigenomic marks, including DNA methylation (DNAm). Changes in DNAm are often interpreted as damage or plastic responses of the embryo. Here, we propose that stochastic DNAm variation, generated during remodeling of the epigenome after fertilization, contributes to DNAm signatures of prenatal adversity through differential survival of embryos. Using a mathematical model of re-methylation in the early embryo, we demonstrate that selection, but not plasticity, will generate a characteristic reduction in DNAm variance at loci that contribute to survival. Such a reduction in DNAm variance was apparent in a human cohort prenatally exposed to the Dutch famine, illustrating that it is possible to detect a signature of selection on epigenomic variation. Selection should be considered as a possible mechanism linking prenatal adversity to subsequent health and may have implications when evaluating interventions. Tobi et al. hypothesize that prenatal adversity can cause selection on epigenomic profiles in utero. Their model predicts that such selection reduces the variance in DNA methylation at genomic regions that contribute to survival, which is testable and detectable in empirical data from the Dutch famine.

Detaljer

Författare
  • Elmar W. Tobi
  • Joost van den Heuvel
  • Bas J. Zwaan
  • L. H. Lumey
  • Bastiaan T. Heijmans
  • Tobias Uller
Enheter & grupper
Externa organisationer
  • Leiden University Medical Centre
  • Wageningen University
  • University of Newcastle upon Tyne
  • Columbia University
  • University of Oxford
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Cellbiologi
  • Evolutionsbiologi

Nyckelord

Originalspråkengelska
Sidor (från-till)2660-2667.e4
TidskriftCell Reports
Volym25
Utgivningsnummer10
StatusPublished - 2018
PublikationskategoriForskning
Peer review utfördJa