Skeletal muscle regeneration using bioactive glass-alginate-cellulose composites

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Developing effective scaffolds is crucial for tissue regeneration.
• Alginate and cellulose are biocompatible polymers with potential in tissue engineering.

Purpose of the Study:

• To develop and characterize alginate-microcrystalline cellulose scaffolds enhanced with bioactive glass and gold nanoparticles.
• To evaluate the in vitro and in vivo performance of these scaffolds for muscle tissue regeneration.

Main Methods:

• Freeze-drying process for scaffold fabrication.
• Incorporation of bioactive glass and gold nanoparticles.
• In vitro testing for swelling, degradation, cell viability, and biomineralization.
• In vivo testing using a volumetric muscle loss model in rats.

Main Results:

• Scaffolds showed controlled swelling and degradation, influenced by cellulose content.
• Enhanced cell viability and biomineralization (apatite layer formation) in vitro.
• In vivo studies demonstrated scaffold-induced angiogenesis and myotube formation.
• Significant skeletal myofiber regeneration and scaffold degradation within four weeks post-injury.

Conclusions:

• Alginate-microcrystalline cellulose scaffolds, especially those with bioactive glass and gold nanoparticles, show great promise for muscle tissue regeneration.
• The developed scaffolds possess favorable biocompatibility, degradation profiles, and regenerative capabilities.
• These findings support the potential of these advanced biomaterials in treating volumetric muscle loss injuries.