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Related Experiment Video

Updated: Feb 12, 2026

Reconstitution of Cell-cycle Oscillations in Microemulsions of Cell-free Xenopus Egg Extracts
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Delay models for the early embryonic cell cycle oscillator.

Jan Rombouts1, Alexandra Vandervelde1, Lendert Gelens1

  • 1Laboratory of Dynamics in Biological Systems, Department of Cellular and Molecular Medicine, University of Leuven, 3000 Leuven, Belgium.

Plos One
|March 27, 2018
PubMed
Summary
This summary is machine-generated.

Biological oscillations, like the frog Xenopus laevis embryonic cell cycle, depend on time delays. Modeling these delays differently significantly impacts the resulting oscillations, suggesting crucial parameter constraints.

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Area of Science:

  • * Developmental Biology
  • * Mathematical Biology
  • * Cell Cycle Regulation

Background:

  • * Biological oscillations are fundamental to many cellular processes.
  • * Time delays are critical for generating these oscillations, as seen in the Xenopus laevis early embryonic cell cycle.
  • * Existing mathematical models for this system do not fully clarify how to best represent the time delay.

Purpose of the Study:

  • * To investigate the impact of different time delay implementations on biological oscillations.
  • * To analyze a simple cell cycle model featuring an ultrasensitive, time-delayed negative feedback loop.
  • * To constrain model parameters using experimental data.

Main Methods:

  • * Implementing a time delay in three distinct ways: fixed, distributed, and state-dependent.
  • * Analyzing the resulting system dynamics for each time delay implementation.
  • * Interpreting model dynamics against experimental observations from Xenopus laevis.

Main Results:

  • * Different methods of implementing time delays lead to significant variations in oscillation patterns.
  • * The choice of time delay model influences the dynamics of the cell cycle.
  • * Experimental data can be used to refine and constrain parameters in these models.

Conclusions:

  • * The precise modeling of time delays is crucial for accurately simulating biological oscillations.
  • * The study provides insights into parameter constraints for cell cycle models.
  • * Findings highlight the importance of considering delay implementations in systems biology.