Orthogonally engineering matrix topography and rigidity to regulate multicellular morphology.

Area of Science:

• Biomaterials Science
• Cell Biology
• Tissue Engineering

Background:

• Living systems feature dynamic extracellular matrices (ECM) that regulate cell behavior.
• Understanding how ECM properties influence multicellular structures is crucial for regenerative medicine and developmental biology.
• Programmable polymer substrates offer a tunable platform to mimic ECM variations.

Purpose of the Study:

• To investigate the role of cell-matrix adhesion in regulating multicellular morphology.
• To explore how modulating matrix topography and elasticity affects cell-structure formation.
• To establish a link between cell-matrix interactions and the resulting multicellular organization.

Main Methods:

• Fabrication of programmable polymer substrates with controlled topography and elasticity.
• Culturing cells on these substrates to observe multicellular arrangements.
• Quantifying cell-matrix adhesion and cell-cell adhesion forces.
• Analyzing cytoskeleton organization and cell migration dynamics.

Main Results:

• Multicellular morphology is governed by the balance between cell-matrix and cell-cell adhesion.
• Decreasing cell-matrix adhesion triggers cytoskeleton reorganization.
• Reduced cell-matrix adhesion inhibits lamellipodial crawling, leading to increased multicellular leakiness.

Conclusions:

• Programmable polymer substrates effectively mimic dynamic ECMs to control multicellular structures.
• Cell-matrix adhesion is a key regulator of multicellular morphology and integrity.
• The findings provide insights into controlling cell organization for tissue engineering applications.