Multiple scale model for cell migration in monolayers: Elastic mismatch between cells enhances motility.

Area of Science:

• Cell biology
• Biophysics
• Computational modeling

Background:

• Cell migration is crucial for biological processes, but cancer cell motility is complex.
• Existing models often include multiple factors influencing cancer cell movement.
• Isolating the role of specific physical properties, like elasticity, is challenging.

Purpose of the Study:

• To investigate the impact of elasticity mismatch on cancer cell migration.
• To model a simplified system of motile cells with varying stiffness.
• To understand how differences in cell elasticity affect migration potential.

Main Methods:

• Developed a multiscale model for cell monolayers using a phase-field description.
• Modeled individual cells as self-propelled, deformable droplets.
• Simulated monolayers with a single soft cancer cell in a stiff normal cell layer.

Main Results:

• Elasticity mismatch alone significantly enhances cancer cell motility.
• Cancer cell trajectories show speed bursts due to relaxation from deformed shapes.
• Observed qualitative agreement between simulation results and experimental data on motility and bursts.

Conclusions:

• Cellular elasticity is a key factor influencing cancer cell migration.
• The model provides insights into the physical mechanisms driving cancer cell movement.
• This simplified approach can explain experimental observations of enhanced motility and speed bursts.