Cytoskeletal transition in patterned cells correlates with interfacial energy model

Area of Science:

• Cell Biology
• Biophysics
• Materials Science

Background:

• Cell morphology is regulated by microenvironmental cues and intracellular signals.
• Cell fate is influenced by the mechanics and geometry of the surrounding matrix, particularly in 2D micropatterns.

Purpose of the Study:

• To investigate how the geometry of the surrounding matrix affects cell adhesion and morphology.
• To study endothelial cell behavior on micropatterned surfaces with varying stripe widths.

Main Methods:

• Endothelial cells were cultured on maleic acid copolymer surfaces patterned with fibronectin stripes using microcontact printing.
• Actin stress fiber spacing was measured in dependence on stripe width.
• Cells on stripes were simulated as droplet-like structures, varying interfacial energy, total volume, and nuclear dimensions.

Main Results:

• Experimental results showed a biphasic behavior of actin stress fiber spacing with a critical stripe width of approximately 15 μm.
• Simulations revealed a biphasic behavior in cell morphology and area, triggered by interfacial energy minimization.
• The critical stripe width in simulations closely matched the experimental findings.

Conclusions:

• The study suggests a correlation between experimental and simulation results, indicating a potential mechanism for cytoskeletal rearrangements based on interfacial energy.
• Cellular response to geometric cues is complex and can be modeled using biophysical principles.