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Related Experiment Videos

Cell-based simulation of dynamic expression patterns in the presomitic mesoderm.

Hendrik B Tiedemann1, Elida Schneltzer, Stefan Zeiser

  • 1Institute of Experimental Genetics, GSF-National Research Centre for Environment and Health, Ingolstädter Landstrasse 1, D-85764 Neuherberg, Germany.

Journal of Theoretical Biology
|June 20, 2007
PubMed
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We developed a Java application to simulate gene regulatory networks in somitogenesis, modeling collective cell behavior and dynamic gene expression patterns. This tool aids in understanding vertebrate embryonic development and segmentation processes.

Area of Science:

  • Developmental Biology
  • Computational Biology
  • Systems Biology

Background:

  • Somitogenesis, the formation of body segments in vertebrate embryos, is regulated by the 'clock-and-wave-front' model.
  • This model involves a 'segmentation clock' with oscillating gene expression (e.g., Hes1, Hes7) and a 'wave front' moving caudally.
  • The segmentation clock relies on negative feedback loops where gene products repress their own transcription.

Purpose of the Study:

  • To develop a computational tool for simulating gene regulatory networks in multicellular systems.
  • To model dynamic gene expression patterns during somitogenesis using a parallel simulation approach.
  • To visualize the collective behavior of thousands of cells in silico.

Main Methods:

  • Developed a Java application for parallel simulation of gene regulatory networks.

Related Experiment Videos

  • Utilized the Java3D API for visualization of simulated cellular behavior.
  • Coupled Hes1 mRNA decay to a gradient mechanism similar to the mesodermal Fgf8 gradient.
  • Simulated Delta-Notch signaling to synchronize oscillations across multiple cells.

    • Main Results:

    • Successfully simulated dynamic Hes1 expression patterns consistent with experimental observations.
    • Demonstrated the ability to model the collective behavior of thousands of cells.
    • Showcased synchronization of Hes1 oscillations in simulated cells via Delta-Notch signaling.
    • Validated the 'clock-and-wave-front' model through computational simulation.

    Conclusions:

    • The developed Java application provides a powerful tool for studying somitogenesis and gene regulatory networks.
    • Computational modeling can effectively replicate complex biological processes like segmentation clock dynamics.
    • Simulated Delta-Notch signaling highlights its role in coordinating cellular oscillations during development.