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A Modular Workflow for Quantitative, Structural and Functional Analysis of Leptospira Biofilms
Published on: December 19, 2025
Dynamic modelling of cell death during biofilm development
Magnus G Fagerlind1, Jeremy S Webb, Nicolas Barraud
1Systems Biology, School of Life Sciences, University of Skövde, Skövde, Sweden. magnus.fagerlind@his.se
Journal of Theoretical Biology
|November 22, 2011
Summary
Bacterial cell death significantly impacts biofilm development, particularly under low nutrient conditions. Damage accumulation appears to be the primary driver of cell death in biofilms, influencing their structure and dispersal.
Area of Science:
- Microbiology
- Biophysics
- Mathematical Biology
Background:
- Biofilms are the predominant bacterial lifestyle, influenced by processes including adhesion, detachment, and cell death.
- Cell death is a critical yet understudied factor in biofilm development and dispersal.
Purpose of the Study:
- To model the process of cell death during biofilm development, focusing on spatial localization.
- To evaluate rules governing cell death based on starvation, damage accumulation, and viability.
Main Methods:
- Developed a computational model simulating cell death during biofilm formation.
- Evaluated three distinct rules for cell death: starvation, damage accumulation, and viability.
- Designed laboratory experiments to validate model predictions.
Main Results:
- Model simulations revealed nutrient gradients within biofilms leading to cell death and detachment.
- High substrate concentrations accelerated cell death under two modeled rules.
- A damage accumulation rule predicted earlier cell death at low substrate concentrations.
Conclusions:
- Bacterial cell death is favored under low nutrient conditions in biofilms.
- Accumulation of damage is likely the primary cause of cell death during biofilm development.
- Modeling and experimental comparisons support damage accumulation as the key driver.
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