Mechanically-enhanced polysaccharide-based scaffolds for tissue engineering of soft tissues

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Collagen is widely used in tissue engineering but has limitations in mechanical properties.
• Developing mechanically robust and porous scaffolds is crucial for clinical translation.

Purpose of the Study:

• To investigate chitosan-xanthan gum blends as alternatives to collagen scaffolds.
• To enhance scaffold properties using a surfactant and silicone rubber for soft tissue engineering.

Main Methods:

• Fabrication of chitosan-xanthan gum (Ch-X) matrices.
• Incorporation of Kolliphor® P188 (K) for porosity and Silpuran® 2130A/B (S) for mechanical strength.
• Evaluation of porosity, mechanical properties (compressive and tensile loads), viscoelastic behavior, and biocompatibility.

Main Results:

• Addition of K increased scaffold porosity and pore size.
• Addition of S significantly improved elastic moduli (up to 156%) and elastic behavior (up to 85%).
• Scaffolds exhibited viscoelastic behavior and maintained favorable characteristics like liquid uptake and low cytotoxicity.

Conclusions:

• Chitosan-xanthan gum-silicone rubber (Ch-X-S) blends demonstrate promising potential as scaffolds for soft tissue engineering.
• The developed materials offer a balance of porosity and enhanced mechanical properties, addressing limitations of traditional collagen scaffolds.