Suppressing collective cell motion with bidirectional guidance cues

Area of Science:

• Cell Biology
• Biophysics
• Collective Cell Migration

Background:

• Cells navigate complex environments using various chemical and physical cues.
• Dictyostelium discoideum (Dicty) is a model organism for studying guided cell migration.
• Chemical signals typically induce collective streaming and aggregation in Dicty cells.

Purpose of the Study:

• To investigate the competition between chemical and physical guidance cues in Dicty cell group motion.
• To understand how physical cues influence collective cell streaming and aggregation behaviors.

Main Methods:

• Utilized Dictyostelium discoideum as a model system for guided cell migration experiments.
• Employed parallel nanoridges as a physical guidance cue.
• Combined experimental observations with numerical simulations to analyze cell behavior.

Main Results:

• Parallel nanoridges, acting as a physical cue, suppressed chemical signal-induced streaming and aggregation.
• The bidirectional nature of physical guidance by nanoridges was crucial for suppressing collective behaviors.
• A physical guidance cue of comparable strength to chemical signals effectively altered cell migration patterns.

Conclusions:

• Physical guidance cues can override or compete with chemical cues in directing collective cell migration.
• The bidirectional property of physical cues plays a significant role in modulating cell aggregation and streaming.
• Combining diverse guidance cues offers a versatile strategy for controlling and understanding collective cell behaviors.