Improving cellular migration in tissue-engineered laryngeal scaffolds

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Polyhedral oligomeric silsesquioxane poly(carbonate-urea) urethane is a promising material for tissue-engineered scaffolds.
• Non-porous scaffold surfaces can impede cell infiltration and integration.

Purpose of the Study:

• To modify the surface of a tissue-engineered laryngeal scaffold to enhance cell entry.
• To improve the biocompatibility and cellular integration of the scaffold material.

Main Methods:

• Characterization of mechanical properties, surface topography, and chemistry of the scaffold material.
• Introduction of surface perforations using a laser technique.
• Assessment of scaffold porosity using micro computed tomography.
• Seeding scaffolds with cells, followed by histological and proliferation studies.

Main Results:

• Laser perforation significantly increased scaffold porosity, connecting the internal structure to the external environment.
• Cellular studies demonstrated improved cell viability and adherence to the scaffold surface and within perforations.
• Histology confirmed cell migration into the laser-perforated scaffolds.
• Pore diameter decreased by 11% after 15 days of incubation, correlating with a reduction in Young's modulus.

Conclusions:

• Surface perforation via laser cutting is a viable strategy to enhance tissue-engineered scaffolds.
• This modification improves cell infiltration and integration, crucial for laryngeal regeneration.
• The modified scaffold shows potential for improved outcomes in tissue engineering applications.