Light-Responsive Hierarchically Structured Liquid Crystal Polymer Networks for Harnessing Cell Adhesion and Migration

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Cellular Biology

Background:

• The extracellular microenvironment's dynamic nature, including matrix topography, critically regulates cellular behavior.
• Mimicking the natural microenvironment with stimuli-responsive materials is key in regenerative medicine.

Purpose of the Study:

• To engineer adaptive biomaterials for directing cell migration using light-responsive liquid crystal polymer networks.
• To investigate the impact of dynamic topographical changes on cell behavior.

Main Methods:

• Fabrication of hybrid surfaces with co-existing micrometer-scale topographical cues and nanoscale roughness using light-responsive liquid crystal polymer networks.
• Utilizing light to induce temporal changes in surface nanoroughness in situ.
• Quantifying cell migration speed and patterns in response to topographical stimuli.

Main Results:

• Cell migration speed and patterns were significantly influenced by the height of micrometer-scale topographies and variations in surface nanoroughness.
• Cell migration patterns could be dynamically switched by altering surface nanoroughness in real-time.
• Demonstrated the creation of photoswitchable topographies, enabling reversible control over surface characteristics.

Conclusions:

• Light-responsive liquid crystal polymer networks can effectively present dynamic topographical cues to direct cell migration.
• The ability to modulate both microscale and nanoscale features allows for precise control over cellular responses.
• Photoswitchable topographies offer a promising platform for on-demand, reversible control of cell behavior in regenerative medicine applications.