CFM: Confinement Force Microscopy-a dynamic, precise and stable microconfiner for traction force microscopy in spatial confinement

Confinement Force Microscopy reveals two-phase cellular stress response to dynamic spatial confinement, with a 2-stage increase in traction forces during migration.

• Why it matters: Understanding how cells adapt mechanically to changing tissue environments is crucial for insights into migration, invasion, and tissue development, yet current methods lack real-time control and force measurement capabilities.
• What they did: The study developed a programmable microconfiner platform for live-cell imaging, enabling real-time modulation of confinement and simultaneous measurement of traction forces, termed confinement force microscopy (CFM).
• The result: CFM uncovered that cells initially respond with a rapid passive stress increase, followed by an active contractility-driven stress rise, with bleb formation modulating pressure, providing a versatile tool for studying cellular mechanical adaptation.