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Related Experiment Video

Updated: May 13, 2026

Mouse Mammary Epithelial Cells form Mammospheres During Lactogenic Differentiation

Mouse Mammary Epithelial Cells form Mammospheres During Lactogenic Differentiation

Published on: October 6, 2009

Eomesodermin is required for mouse trophoblast development and mesoderm formation.

A P Russ¹, S Wattler, W H Colledge

¹Wellcome/CRC Institute for Cancer and Developmental Biology, and Department of Physiology, University of Cambridge, UK. apr@mole.bio.cam.ac.uk

|March 15, 2000

Summary

This summary is machine-generated.

The T-box gene Eomesodermin is crucial for early mammalian development, regulating both trophoblast differentiation for placental formation and mesoderm development during gastrulation. Embryos lacking Eomesodermin fail to form these essential lineages.

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Area of Science:

Developmental Biology
Genetics
Stem Cell Biology

Background:

Mammalian embryonic development involves critical cell fate decisions, including trophoblast lineage specification and germ layer formation during gastrulation.
The T-box gene Eomesodermin (Eomes) is a key regulator in early embryonic development, but its precise roles in mammalian trophoblast and embryonic lineages require further elucidation.

Purpose of the Study:

To investigate the essential functions of Eomesodermin in mammalian trophoblast development and embryonic gastrulation.
To determine the role of Eomesodermin in the formation of trophoblast stem cells and germ layers.

Main Methods:

Analysis of mouse embryos lacking functional Eomesodermin.
Examination of trophoectoderm differentiation and epiblast development in mutant embryos.
Assessment of mesoderm formation and primitive streak recruitment.

Main Results:

Mouse embryos deficient in Eomesodermin arrest at the blastocyst stage.
Mutant trophoectoderm fails to differentiate into trophoblast, suggesting a role in trophoblast stem cell development.
Eomesodermin is essential for mesoderm formation, as prospective mesodermal cells are not recruited into the primitive streak, despite intact anterior-posterior axis specification.

Conclusions:

Eomesodermin plays critical roles in both extra-embryonic (trophoblast) and embryonic lineages during mammalian development.
Eomesodermin regulates conserved morphogenetic pathways for germ layer formation and has acquired a specific function in mammalian trophoblast differentiation.