Sensing Traction Force on the Matrix Induces Cell-Cell Distant Mechanical Communications for Self-Assembly

Area of Science:

• Cell Biology
• Biophysics
• Biomaterials Science

Background:

• Cell-cell communication is vital for collective cell behaviors like tissue formation.
• Mechanisms of long-range communication within cell populations remain poorly understood.
• Biomechanical forces may play a role in coordinating distant cellular responses.

Purpose of the Study:

• To investigate how cells communicate and self-assemble via long-range biomechanical forces.
• To elucidate the role of matrix properties in mediating these long-range interactions.
• To understand the implications for collective cell migration and tissue patterning.

Main Methods:

• 3D cell culture on Matrigel with type I collagen (COL).
• Microscopy to observe cell behavior and protrusion formation.
• Traction force microscopy and bead tracking assays.
• Finite element method modeling.

Main Results:

• Airway smooth muscle cells (ASMCs) and HUVEC cells self-assembled into networks mediated by long-range forces.
• ASMCs extended protrusions towards distant cells (100-300 μm), sensing each other's forces.
• Force transmission and directional sensing were dependent on matrix properties, being lost in cross-linked gels.
• Traction forces transmitted up to 400 μm through the matrix, correlating with cell movement patterns.
• ASMCs actively remodeled the matrix, recruiting COL to stabilize the assembled network.

Conclusions:

• Cells can sense and utilize long-range biomechanical forces transmitted through extracellular matrices for communication.
• This mechanosensing enables coordinated cell migration, self-assembly, and matrix remodeling.
• The findings reveal a novel mechanism for collective cell behavior with implications for tissue development and diseases like cancer metastasis.