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Modeling digits. Digit patterning is controlled by a Bmp-Sox9-Wnt Turing network modulated by morphogen gradients.

J Raspopovic1, L Marcon1, L Russo1

  • 1Systems Biology Program, Centre for Genomic Regulation (CRG), and Universitat Pompeu Fabra (UPF), Dr. Aiguader 88, 08003 Barcelona, Spain.

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Summary
This summary is machine-generated.

Researchers identified key molecular players, Bone Morphogenetic Proteins (Bmp), Sox9, and Wnt signaling, that drive digit formation during limb development through a self-organizing Turing mechanism.

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Area of Science:

  • Developmental biology
  • Systems biology
  • Computational modeling

Background:

  • Limb development involves digit formation from mesenchymal tissue.
  • A self-organizing Turing mechanism is proposed to control digit patterning.
  • The specific molecular components of this mechanism remain unidentified.

Purpose of the Study:

  • To identify the molecular network driving digit specification during limb development.
  • To investigate the role of Bone Morphogenetic Proteins (Bmp), Sox9, and Wnt signaling in this process.
  • To model and validate the proposed Turing mechanism using computational simulations.

Main Methods:

  • Experimental studies combined with realistic two-dimensional computational modeling.
  • Development of a simulation of digit patterning incorporating morphogen gradients.
  • Analysis of gene expression patterns in wild-type and perturbed conditions.

Main Results:

  • Evidence suggests a Turing network involving Bmp, Sox9, and Wnt drives digit specification.
  • The computational model successfully recapitulated Sox9 expression patterns.
  • The model accurately predicted patterns in both wild-type and perturbation experiments.

Conclusions:

  • A Bmp, Sox9, and Wnt-based Turing network, modulated by morphogen gradients, underlies digit patterning.
  • This systems biology approach demonstrates robust pattern formation through growth, gradients, and self-organization.
  • The study elucidates a key molecular mechanism in vertebrate limb development.