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Extraembryonic gut endoderm cells undergo programmed cell death during development.

Julia Batki1, Sara Hetzel1, Dennis Schifferl2

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|June 7, 2024
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Summary
This summary is machine-generated.

Extraembryonic cells in mouse gut retain developmental memory and undergo programmed cell death. These cells disappear by midgestation in wild-type embryos but persist in p53-mutant ones.

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Area of Science:

  • Developmental Biology
  • Epigenetics
  • Cell Biology

Background:

  • Extraembryonic cells contribute to embryonic tissues like the gut endoderm.
  • These cells possess a unique epigenome distinct from embryonic cells.
  • Questions remain about epigenome resetting and extraembryonic cell persistence in the embryo.

Purpose of the Study:

  • To investigate the epigenetic memory and fate of extraembryonic cells within the developing mouse gut.
  • To determine if extraembryonic cells persist into later stages of embryonic development.

Main Methods:

  • Development of a two-colour lineage-tracing strategy.
  • Tracking and isolation of extraembryonic cells over time.
  • Analysis of DNA methylation landscape and transcriptional signatures.

Main Results:

  • Extraembryonic gut cells retain epigenetic memory of their origin, including DNA methylation patterns.
  • Extraembryonic cells undergo programmed cell death, with embryonic cells clearing their remnants.
  • Extraembryonic cells are cleared by midgestation in wild-type embryos.
  • Extraembryonic cells persist and differentiate in p53-mutant embryos.

Conclusions:

  • Extraembryonic cells in the mouse gut exhibit significant developmental origin memory.
  • Programmed cell death and phagocytosis eliminate extraembryonic cells in normal development.
  • p53 mutation affects the clearance of extraembryonic cells, leading to their persistence.