Interplay between motility and cell-substratum adhesion in amoeboid cells

Area of Science:

• Cell Biology
• Biophysics
• Mechanobiology

Background:

• Amoeboid cell migration relies on precise control of cell-substratum adhesion.
• Biophysical and biochemical cues regulate cell migration and adhesion dynamics.

Purpose of the Study:

• To investigate the role of calcium-based mechanosensation in regulating cell-substratum adhesion and migratory adaptability.
• To identify optimal mechanosensitive conditions for directed cell migration across diverse substrates.

Main Methods:

• Utilized mechanotactically driven Dictyostelium discoideum.
• Manipulated extracellular calcium concentrations to assess mechanosensory activity and cell adhesion.
• Inhibited mechanosensitive ion channels using gadolinium to study adhesion reduction.

Main Results:

• Discovered optimal extracellular calcium levels enhance Dictyostelium migration directionality and speed on different substrates.
• Identified a minimum in cell-substratum adhesion within a narrow calcium concentration range, amplifying adhesion differences between substrates.
• Blocking mechanosensitive channels impaired active adhesion reduction, leading to reduced directed migration.

Conclusions:

• Calcium-based mechanosensation is crucial for actively regulating cell-substratum adhesion and achieving migratory adaptability in amoeboid cells.
• Dictyostelium cells' adaptive responses suggest potential for novel surface analyses using their mechanobiological probing capabilities.