A photocurable hydrogel/elastomer composite scaffold with bi-continuous morphology for cell encapsulation

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Load-bearing soft tissue injuries require advanced biomaterials for effective repair.
• Current tissue engineering scaffolds often struggle to balance mechanical properties with cell viability and function.
• A bi-continuous scaffold morphology offers potential for improved integration and nutrient transport.

Purpose of the Study:

• To design and characterize a photocurable, two-phase scaffold with a bi-continuous morphology for load-bearing soft tissue repair.
• To evaluate the scaffold's ability to support chondrocyte proliferation, metabolic activity, and extracellular matrix deposition.
• To assess the material's stability and degradation over a 14-day culture period.

Main Methods:

• Fabrication of a photocurable two-phase scaffold using N-methacrylate glycol chitosan (MGC) hydrogel and a star-poly(ε-caprolactone-co-D,L-lactide) triacrylate elastomer.
• Incorporation and photocrosslinking of chondrocytes within the bi-continuous scaffold structure.
• In vitro culture of chondrocytes within the scaffold for 14 days.
• Assessment of cell proliferation, metabolic activity, and extracellular matrix accumulation.

Main Results:

• The bi-continuous scaffold successfully supported chondrocyte proliferation and increased metabolic activity.
• Significant accumulation of extracellular matrix was observed over the 14-day culture period.
• No significant material degradation was detected during the study duration, indicating good stability.

Conclusions:

• The developed photocurable two-phase scaffold demonstrates promising potential for load-bearing soft tissue regeneration.
• The scaffold's unique bi-continuous morphology and composition effectively support chondrocyte function and tissue formation.
• This biomaterial represents a viable option for advancing soft tissue repair strategies.