Interfacial Energy Balance Governs Initial Cell Spreading Dynamics.

Area of Science:

• Biophysics
• Cell Biology
• Biomaterials Science

Background:

• Cell spreading is crucial for tissue formation, wound healing, and cancer metastasis.
• Early cell spreading (<1 min) is understudied, with prior research focusing on later stages (1-10 min).

Purpose of the Study:

• To develop a quantitative model for initial cell spreading dynamics (<1 min).
• To investigate cell spreading behaviors of different breast cell lines on extracellular matrix-coated substrates.

Main Methods:

• Developed a deterministic model based on interfacial energy balance (strain energy, adhesion energy, viscous dissipation).
• Utilized interference reflection microscopy (IRM) to observe cell spreading.
• Employed atomic force microscopy (AFM) to measure biomechanical and biochemical parameters.

Main Results:

• Model predictions showed strong agreement with experimental observations of cell spreading.
• Characterized spreading behaviors of MCF-10A, MCF-7, and MDA-MB-231 breast cell lines.
• Integrated biophysical and biochemical parameters to quantitatively describe initial spreading.

Conclusions:

• The study presents a universal framework for understanding initial cell spreading dynamics.
• Findings offer insights into regulating cell spreading for potential applications in cancer therapy and tissue engineering.