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The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
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Nodal Signaling: A Paradigm for TGFβ Signaling in Embryonic Development.

Jakob El Kholtei1,2, Mireia Codina-Tobias1, Alexander F Schier1,2

  • 1Biozentrum, Universität Basel, Basel, Switzerland;

Annual Review of Cell and Developmental Biology
|August 8, 2025
PubMed
Summary
This summary is machine-generated.

Nodal signaling, a key pathway in embryonic development, regulates cell fate and tissue patterning through complex mechanisms. Further research is needed to fully understand how Nodal signaling controls gene expression and tissue formation in vertebrates.

Keywords:
NodalTGFβembryonic developmentendodermgastrulationleft-right asymmetrymesodermmorphogenpatterningpluripotencysignaling

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Evolutionary Biology

Background:

  • Nodal signaling molecules are TGFβ family ligands critical for bilaterian embryonic development.
  • They regulate mesoderm/endoderm specification, body patterning, left-right asymmetry, and pluripotency.
  • Nodal acts as a morphogen utilizing multiple patterning mechanisms.

Purpose of the Study:

  • To elucidate the conserved developmental functions of Nodal signaling in vertebrates.
  • To clarify the mechanisms underlying Nodal-induced transcriptional responses.
  • To understand how Nodal signaling patterns embryonic tissues.

Main Methods:

  • Analysis of Nodal signaling pathways.
  • Investigating gene regulatory networks.
  • Studying morphogen dynamics in embryonic development.

Main Results:

  • Nodal signaling activates diverse target genes involved in cell specification and morphogenesis.
  • Nodal's effects are tissue-specific and involve interactions with other signaling pathways.
  • Concentration-dependent effects, feedback, and reaction-diffusion are key patterning mechanisms.

Conclusions:

  • Nodal signaling is essential for conserved developmental processes across vertebrates.
  • Understanding Nodal's mechanisms is crucial for developmental biology.
  • Further research is required to fully map Nodal's transcriptional control and tissue patterning roles.