Cobalt/Bioglass Nanoparticles Enhanced Dermal Regeneration in a 3-Layered Electrospun Scaffold

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Nanotechnology

Background:

• Skin tissue engineering requires advanced scaffolds that mimic its complex multilayered structure.
• Bioglass nanoparticles offer potential for stimulating cellular activity in regenerative medicine.

Purpose of the Study:

• To develop and evaluate a 3-layer engineered skin scaffold incorporating 45s5 bioglass nanoparticles doped with cobalt ions.
• To assess the scaffold's ability to promote fibroblast proliferation, protein secretion, and gene expression for skin regeneration.

Main Methods:

• A 3-layer scaffold composed of polyurethane (PU), polycaprolactone (PCL), collagen, and nanoparticle composites was fabricated.
• Scaffolds were characterized using SEM, FTIR, tensile testing, and hydrophilicity measurements.
• Biological assessments included cell survival, adhesion, and gene expression analysis (TGF β1, VEGF).

Main Results:

• The scaffold with cobalt-doped bioglass nanoparticles exhibited enhanced mechanical properties (higher Young's modulus) and reduced surface hydrophilicity.
• Significant weight loss was observed due to the alkaline effect of metal ions, indicating degradation.
• Improved cell proliferation, adhesion, and reduced toxicity were confirmed, alongside upregulation of TGF β1 and VEGF genes.

Conclusions:

• The 3-layered scaffold loaded with cobalt ions-bonded bioglass nanoparticles serves as a superior substrate for fibroblast culture.
• This engineered scaffold demonstrates significant potential for advancing skin tissue regeneration applications.