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Related Concept Videos

Gastrulation01:56

Gastrulation

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Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
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Cleavage and Blastulation01:33

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After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller.
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Related Experiment Video

Updated: May 29, 2025

Visualizing the Node and Notochordal Plate In Gastrulating Mouse Embryos Using Scanning Electron Microscopy and Whole Mount Immunofluorescence
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Visualizing the Node and Notochordal Plate In Gastrulating Mouse Embryos Using Scanning Electron Microscopy and Whole Mount Immunofluorescence

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Organizer activity in the mouse embryo.

Jenny Kretzschmar1, Katharine Goodwin1, Katie McDole1

  • 1MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge CB2 0QH, United Kingdom.

Cells & Development
|February 8, 2025
PubMed
Summary
This summary is machine-generated.

The Spemann-Mangold organizer, crucial for axis induction in vertebrates, is conserved. This review explores the mouse gastrula organizer, its role in early development, and the debate surrounding a mammalian head organizer.

Keywords:
AVEGastrulaMouseNodeOrganizerPre-chordal plate

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Area of Science:

  • Developmental Biology
  • Embryology
  • Evolutionary Developmental Biology

Background:

  • The discovery of the embryonic organizer by Spemann and Mangold in 1924 revolutionized developmental biology.
  • The Spemann-Mangold organizer, an axis-inducing center, is evolutionarily conserved across vertebrates.
  • Identifying similar organizing centers in mammals has remained a significant challenge since the initial discovery.

Purpose of the Study:

  • To provide a historical overview of the mouse gastrula organizer's discovery.
  • To discuss the potential role of the mouse organizer in early post-implantation development.
  • To examine the evidence for and against a head organizer in mice, including the roles of the anterior visceral endoderm and prechordal plate.

Main Methods:

  • Review of historical literature on embryonic organizers.
  • Analysis of cell migration patterns within the mouse organizer region.
  • Examination of morphogenetic processes in organizer cells and tissues.
  • Evaluation of experimental evidence regarding head organizer function in mice.

Main Results:

  • The mouse gastrula organizer shows potential for organizing early post-implantation development.
  • Cellular migrations and tissue morphogenesis in the mouse organizer region are critical for development.
  • Evidence for and against a distinct head organizer in mice is presented, highlighting the roles of specific signaling centers.

Conclusions:

  • The mouse gastrula organizer plays a significant role in mammalian embryonic development.
  • Further research is needed to fully elucidate the existence and function of a mammalian head organizer.
  • Understanding these organizing centers is key to comprehending vertebrate embryonic patterning.