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During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
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Related Experiment Video

Updated: Jun 26, 2025

Three and Four-Dimensional Visualization and Analysis Approaches to Study Vertebrate Axial Elongation and Segmentation
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Neuromesodermal specification during head-to-tail body axis formation.

C Martins-Costa1, V Wilson2, A Binagui-Casas2

  • 1Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna BioCenter, Vienna, Austria.

Current Topics in Developmental Biology
|May 10, 2024
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Summary
This summary is machine-generated.

Neuromesodermal progenitors (NMPs) are key to vertebrate body axis development. Understanding the balance of signals regulating NMP fate is crucial for developmental biology and clinical applications.

Keywords:
Axis elongationMesodermNeurectodermNeuromesodermal competent cells (NMC)Neuromesodermal progenitors (NMP)Sox2Tail budTbxt

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Area of Science:

  • Developmental biology
  • Stem cell biology
  • Regenerative medicine

Background:

  • Vertebrate body axis development relies on axial progenitors at the posterior embryo.
  • Neuromesodermal competent cells (NMCs) or Neuromesodermal Progenitors (NMPs) generate neural tube and somites.
  • NMPs have significant clinical potential due to their dual lineage commitment.

Purpose of the Study:

  • To overview signaling and gene regulatory networks in NMCs/NMPs.
  • To discuss the balance of mesodermal and neural fate decisions.
  • To highlight lesser-studied proteins in axial progenitor maintenance and differentiation.

Main Methods:

  • Review of signaling pathways (Wnt/β-catenin, FGF, retinoic acid).
  • Analysis of transcription factor regulation (Brachyury, Sox2).
  • Examination of mutant phenotypes associated with axial defects.

Main Results:

  • NMP maintenance requires a balance of Wnt/β-catenin, FGF, and retinoic acid signaling.
  • Co-expression of Brachyury and Sox2 maintains progenitor identity.
  • Imbalances in signaling lead to mesodermal or neural lineage commitment.

Conclusions:

  • The precise mechanisms achieving mesodermal vs. neural fate balance in NMPs are not fully understood.
  • Mutant phenotypes suggest roles for uncharacterized proteins in NMP function.
  • Further research into NMP regulation could advance developmental biology and regenerative medicine.