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Suppression of positional errors in biological development.

D M Holloway1, L G Harrison

  • 1H.C. Orsted Institute, Chemistry Laboratory III, Copenhagen University, Denmark. lionel@pepe.chem.ubc.ca

Mathematical Biosciences
|April 16, 1999
PubMed
Summary
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Embryonic cells use positional information for development. Inter-cell communication, modeled using reaction-diffusion systems, effectively suppresses positional errors caused by low molecule concentrations.

Area of Science:

  • Developmental biology
  • Systems biology
  • Biophysics

Background:

  • Developing embryos rely on positional information for cell differentiation.
  • Extracellular chemical gradients are the widely accepted mechanism for conveying positional signals.
  • Low molecule concentrations in gradients can lead to significant positional reading errors due to random fluctuations.

Purpose of the Study:

  • To investigate mechanisms by which embryos suppress positional reading errors.
  • To demonstrate the necessity of cell-to-cell communication for accurate positional information.
  • To model positional error suppression using reaction-diffusion systems.

Main Methods:

  • Utilized the reaction component of two established Turing-type reaction-diffusion models.

Related Experiment Videos

  • Simulated the local reading of spatial chemical gradients by individual cells.
  • Analyzed the effect of introducing diffusion into the reaction-diffusion models.

    • Main Results:

    • Identified that fluctuations in low molecule concentrations can cause unacceptable positional errors.
    • Showcased that cell-to-cell communication is crucial for mitigating these errors.
    • Demonstrated that incorporating diffusion effectively suppresses positional errors in the models.

    Conclusions:

    • Cellular communication is essential for accurate positional sensing in developing embryos.
    • Reaction-diffusion models provide a framework for understanding how embryos achieve precise spatial patterning.
    • The suppression of positional errors is vital for successful pattern formation during development.