Carboxymethyl Cellulose Entrapped in a Poly(vinyl) Alcohol Network: Plant-Based Scaffolds for Cartilage Tissue...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Cartilage exhibits limited self-healing due to avascularity and low cellularity.
• Tissue engineering offers a promising approach for creating functional cartilage substitutes.
• Developing suitable biomaterial scaffolds is crucial for supporting engineered cartilage formation.

Purpose of the Study:

• To investigate the effects of carboxymethyl cellulose (CMC) incorporation and crosslinking density on polyvinyl alcohol (PVA) scaffold properties.
• To evaluate the potential of tailored PVA/CMC scaffolds for cartilage tissue engineering applications.

Main Methods:

• Polyvinyl alcohol (PVA) was crosslinked with glutaraldehyde (GA) at varying GA/PVA ratios.
• Carboxymethyl cellulose (CMC) was incorporated into the PVA matrix.
• Porous scaffolds were fabricated using a freeze-drying technique.
• Scaffold characterization included ATR-FTIR, swelling tests, mechanical property analysis (Young's modulus), and cell attachment/toxicity assays.

Main Results:

• ATR-FTIR confirmed CMC incorporation into the PVA scaffolds.
• PVA/CMC scaffolds exhibited lower glass transition temperatures and Young's modulus compared to pure PVA scaffolds.
• CMC addition modulated scaffold pore architecture and significantly increased swelling ratios.
• Scaffolds demonstrated good cytocompatibility and supported cell attachment.

Conclusions:

• The incorporation of CMC into PVA scaffolds allows for tailoring of physical and swelling properties.
• PVA/CMC composite scaffolds show promise as suitable biomaterials for engineered cartilage development.
• Further research can optimize these scaffolds for enhanced cartilage regeneration.