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Generation of Stem Cell-Based Mouse Embryo-Like Structures.

Charlotte E Handford1,2, Pallavi Panda1, Ikbal B Mohammad Choudhury1

  • 1Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA.

Methods in Molecular Biology (Clifton, N.J.)
|June 7, 2023
PubMed
Summary

Researchers created stem cell-based ETiX-embryoids that mimic early mouse embryo development. These structures successfully formed key embryonic features like a brain, heart, and gut tube within 8 days.

Keywords:
ETiX-embryoidsEmbryo-like structuresNeurulationOrganogenesisStem cells

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Area of Science:

  • Developmental Biology
  • Stem Cell Biology
  • Embryology

Background:

  • Studying early embryonic development is crucial for understanding implantation and congenital disorders.
  • Existing models often lack the complexity to fully recapitulate post-implantation stages.
  • Stem cell-based embryo models offer a promising alternative for investigating these critical developmental periods.

Purpose of the Study:

  • To detail the protocol for generating ETiX-embryoids, a novel stem cell-based model.
  • To demonstrate the capacity of ETiX-embryoids to mimic key developmental events of post-implantation mouse embryos.
  • To establish a platform for studying early embryogenesis in vitro.

Main Methods:

  • Combining embryonic stem cells, trophoblast stem cells, and Gata4-expressing embryonic stem cells.
  • Utilizing AggreWell dishes for aggregate formation and subsequent 8-day culture.
  • Monitoring morphological and developmental milestones via microscopy and established developmental markers.

Main Results:

  • ETiX-embryoids successfully formed aggregates resembling post-implantation mouse embryos within 4 days.
  • Development included establishment of an anterior signaling center and gastrulation by day 6.
  • By day 8, neurulation occurred, forming an anterior-posterior axis, brain, heart-like structure, and gut tube.

Conclusions:

  • ETiX-embryoids provide a robust and reproducible model for studying post-implantation mouse embryonic development in vitro.
  • This model recapitulates key developmental milestones, including axis formation and organogenesis.
  • ETiX-embryoids represent a significant advancement in developmental biology research, offering new avenues for investigation.