Mechanosensitive Adhesion Explains Stepping Motility in Amoeboid Cells.

Area of Science:

• Cell Biology
• Biophysics
• Computational Biology

Background:

• Amoeboid motility involves cyclical cell shape changes and force generation.
• Coordination between cell length dynamics and surface adhesion is poorly understood.

Purpose of the Study:

• To develop a mechanochemical model explaining periodic length changes and traction forces in Dictyostelium discoideum.
• To investigate the role of cell-environment interactions in amoeboid locomotion.

Main Methods:

• Developed a simple mechanochemical model.
• Explored various cell-environment interaction models.
• Analyzed spatiotemporal adhesion patterns and cell length dynamics.

Main Results:

• The model successfully explains emergent periodic changes in cell length and traction forces.
• Mechanosensitive adhesions are crucial for reproducing observed adhesion patterns.
• Variations in surface properties naturally lead to different motility modes, like gliding.

Conclusions:

• Amoeboid locomotion features emerge from biomechanical principles, particularly mechanosensitive adhesions.
• Biophysics plays a significant role in dictating the dynamics of cell movement.
• The model provides a framework for understanding diverse amoeboid motility patterns.