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Cell lineage branching as a strategy for proliferative control
BMC Biology
|April 11, 2015
Summary
Regulated lineage branching, termed fate control, effectively manages stem cell system disturbances. This strategy, unlike renewal control, addresses limitations in tissue growth and size specification.
Area of Science:
- Developmental Biology
- Stem Cell Biology
- Systems Biology
Background:
- Tissue and organ size specification remains a fundamental unsolved problem in biology.
- Feedback control of cell lineage progression is implicated in size regulation, but its precise function is unclear.
Purpose of the Study:
- To investigate the functional consequences of different stem cell lineage feedback mechanisms.
- To identify feedback strategies that overcome limitations in biological system robustness and size control.
Main Methods:
- Mathematical modeling and simulation of stem cell lineage dynamics under various perturbations.
- Analysis of steady-state and dynamic behaviors of lineage feedback control systems.
Main Results:
- Renewal control, a simple feedback mechanism, exhibits significant drawbacks due to fundamental conservation laws.
- Introducing lineage branching (fate control) effectively mitigates a wide range of perturbations.
- Fate control promotes branching at the expense of renewal and differentiation, demonstrating superior performance.
Conclusions:
- Regulated lineage branching is a robust strategy for managing disturbances in stem cell systems.
- This finding provides a dynamics-based rationale for in vivo cell fate feedback control in tissue growth.
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