Skip to main content
eScholarship
Open Access Publications from the University of California

Postnatal DNA demethylation and its role in tissue maturation.

  • Author(s): Reizel, Yitzhak
  • Sabag, Ofra
  • Skversky, Yael
  • Spiro, Adam
  • Steinberg, Benjamin
  • Bernstein, Diana
  • Wang, Amber
  • Kieckhaefer, Julia
  • Li, Catherine
  • Pikarsky, Eli
  • Levin-Klein, Rena
  • Goren, Alon
  • Rajewsky, Klaus
  • Kaestner, Klaus H
  • Cedar, Howard
  • et al.
Abstract

Development in mammals is accompanied by specific de novo and demethylation events that are thought to stabilize differentiated cell phenotypes. We demonstrate that a large percentage of the tissue-specific methylation pattern is generated postnatally. Demethylation in the liver is observed in thousands of enhancer-like sequences associated with genes that undergo activation during the first few weeks of life. Using. conditional gene ablation strategy we show that the removal of these methyl groups is stable and necessary for assuring proper hepatocyte gene expression and function through its effect on chromatin accessibility. These postnatal changes in methylation come about through exposure to hormone signaling. These results define the molecular rules of 5-methyl-cytosine regulation as an epigenetic mechanism underlying cellular responses to. changing environment.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View