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Morphogenesis02:19

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Using Confocal Analysis of Xenopus laevis to Investigate Modulators of Wnt and Shh Morphogen Gradients
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Published on: December 14, 2015

Nodal morphogens.

Alexander F Schier1

  • 1Department of Molecular and Cellular Biology, Harvard Stem Cell Institute, Center for Brain Science, Broad Institute, Harvard University, Cambridge, Massachusetts 02138, USA. schier@mcb.harvard.edu <schier@mcb.harvard.edu>

Cold Spring Harbor Perspectives in Biology
|January 13, 2010
PubMed
Summary
This summary is machine-generated.

Nodal signals, crucial for embryonic development and left-right axis formation, act as morphogens. Their activity is finely tuned by various regulatory mechanisms, ensuring proper tissue patterning.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Cell Signaling

Background:

  • Nodal signals are part of the TGF-beta superfamily.
  • They are critical for mesoderm and endoderm induction and left-right axis determination.
  • Nodal signals function as morphogens with concentration-dependent effects.

Purpose of the Study:

  • To describe how Nodal morphogens pattern embryonic fields.
  • To discuss the modulation of Nodal morphogen signaling.

Main Methods:

  • Review of existing literature on Nodal signaling.
  • Analysis of Nodal's role in reaction-diffusion models.
  • Examination of regulatory mechanisms influencing Nodal activity.

Main Results:

  • Nodal signals pattern embryonic fields through concentration-dependent mechanisms.
  • Nodal and Lefty form an activator/inhibitor pair, mimicking reaction-diffusion models.
  • Nodal activity is modulated by microRNAs, convertases, TGF-beta signals, coreceptors, and trafficking factors.

Conclusions:

  • Nodal signaling is a complex and highly regulated process essential for embryonic development.
  • Understanding Nodal modulation provides insights into tissue patterning and developmental mechanisms.