Stretching micropatterned cells on a PDMS membrane.

Area of Science:

• Cell biology
• Biomaterials science
• Mechanical engineering

Background:

• Mechanical forces are critical for cellular and tissue functions.
• Understanding cell and tissue responses to mechanical stress is essential for various biological processes.

Purpose of the Study:

• To present a novel, reproducible, and versatile device for applying mechanical forces to cells and tissues.
• To demonstrate a technique for micropatterning PolyDiMethylSiloxane (PDMS) membranes for controlled cell confinement.
• To facilitate studies on cell forces, mechanotransduction, and tissue morphogenesis.

Main Methods:

• Micropatterning of PDMS membranes using deep UV lithography.
• Mounting the PDMS membrane on a mechanical stretcher with a gliding chamber.
• Seeding cells onto micropatterned surfaces and allowing them to spread.
• Applying mechanical stretch (up to 30%) using a micrometric screw, with rapid application (<1 minute).

Main Results:

• The developed device enables reproducible mechanical stretching of cells on micropatterned PDMS.
• The technique is versatile, allowing for specific geometric confinement of cells or tissues.
• The system allows for multiple stretching and unstretching cycles.

Conclusions:

• The presented device offers a valuable tool for investigating the effects of mechanical forces on cells and tissues.
• The micropatterning capability enhances control over experimental conditions.
• Potential for future implementation of motorized or computer-controlled stretching for advanced applications.