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Repulsive expansion dynamics in colony growth and gene expression
Yangxiaolu Cao1, John Neu1, Andrew E Blanchard2
1Department of Biomedical Engineering, Duke University, Durham, North Carolina.
Plos Computational Biology
|March 18, 2021
Summary
Cellular colonies expand through continuous growth, pushing outer cells outward. This study introduces a repulsive-expansion kinetics model for efficient simulation of colony growth and gene expression dynamics.
Area of Science:
- Cell Biology
- Biophysics
- Mathematical Modeling
Background:
- Cellular spatial expansion is fundamental to tissue development and pattern formation.
- Colony expansion is typically driven by cell division and outward displacement of peripheral cells.
- This process generates a complex velocity field within the colony.
Purpose of the Study:
- To develop a simplified kinetic framework for simulating cellular spatial expansion.
- To enable accurate and efficient modeling of growth and gene expression dynamics in cell colonies.
- To provide mechanistic insights into colony development.
Main Methods:
- Approximation of colony expansion using coarse-grained repulsive-expansion kinetics.
- Development of a mathematical framework for simulation.
- Validation across various cell types and sizes, including non-spherical cells.
Main Results:
- The repulsive-expansion kinetics framework accurately simulates colony growth and gene expression.
- The model is efficient and robust, handling variations in cell shape and size.
- The simplified framework facilitates mechanistic understanding of spatial pattern generation.
Conclusions:
- Repulsive-expansion kinetics offers a powerful and efficient approach for modeling cellular colony expansion.
- This framework is applicable to diverse biological systems, including microorganisms, plant, and mammalian cells.
- The model provides valuable mechanistic insights into tissue development and spatial pattern programming.
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