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Temporal BMP4 effects on mouse embryonic and extraembryonic development.

Ron Hadas1, Hernan Rubinstein1, Markus Mittnenzweig2

  • 1Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel.

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|September 18, 2024
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Summary
This summary is machine-generated.

Mouse placental development relies on the extraembryonic ectoderm (ExE). New research reveals how BMP4 signaling from the ExE and embryo proper orchestrates placental and germ cell development during gastrulation.

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Area of Science:

  • Developmental Biology
  • Stem Cell Biology
  • Genomics

Background:

  • The placenta, originating from the extraembryonic ectoderm (ExE) in mice, is crucial for mammalian embryonic development.
  • Unbiased characterization of ExE differentiation dynamics and its interaction with the embryo proper is incomplete.

Purpose of the Study:

  • To develop a temporal single-cell model of mouse gastrulation to map differentiation in embryonic and extraembryonic lineages.
  • To investigate the role of signaling pathways, particularly BMP4, in ExE and embryonic development.

Main Methods:

  • Temporal single-cell RNA sequencing of mouse gastrulation.
  • Three-way perturbation approach targeting signaling from the embryo proper and/or ExE.
  • Analysis of cell differentiation dynamics and lineage specification.

Main Results:

  • ExE specification involves early spatial and transcriptional bifurcation of ectoplacental cone cells and chorion progenitors.
  • Early BMP4 signaling from chorion progenitors is essential for ExE differentiation and trophoblast giant cell specification.
  • Embryonic BMP4 exhibits biphasic regulation: early signaling promotes germ cell specification, while later signaling restricts germ cell numbers by promoting allantois fate.

Conclusions:

  • ExE and embryonic tissues are intricately linked in time, space, and signaling.
  • Integrated understanding and modeling of these interactions are vital for comprehending mammalian development in vivo and in vitro.