Are Tumor Cell Lineages Solely Shaped by Mechanical Forces?

Area of Science:

• Computational biology
• Biophysics
• Tumor microenvironment research

Background:

• Understanding tumor cell aggregate morphology is crucial for cancer research.
• Cell proliferation and spatial arrangement significantly influence tumor development.
• Existing models often simplify the complex mechanical interactions governing cell growth.

Purpose of the Study:

• To investigate cell proliferation dynamics in small tumor cell aggregates.
• To analyze the impact of division plane orientation on aggregate morphology.
• To explore the role of mechanical interactions in shaping cell populations and lineages.

Main Methods:

• Development of an individual-based model (IBM) simulating cell growth, division, and adhesion.
• Modeling cells as incompressible objects that grow and divide upon reaching a threshold size.
• Comparison of simulation results with experimental data using statistical indicators.

Main Results:

• The individual-based model successfully reproduced observed cell proliferation dynamics.
• Simulation results indicated that the orientation of the cell division plane influences aggregate morphology.
• Emergent morphologies in cell aggregates were linked to simple mechanical interactions.

Conclusions:

• Simple mechanical interactions are sufficient to explain the emergence of specific morphologies in tumor cell aggregates.
• The orientation of cell division plays a key role in determining the spatial organization of cells.
• The developed IBM provides a valuable tool for studying tumor growth and morphology.