Biomimetic alginate-based electroconductive nanofibrous scaffolds for bone tissue engineering application

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Nanotechnology

Background:

• Developing functional scaffolds is crucial for effective bone tissue engineering.
• Electrically conductive materials can enhance cellular responses in bone regeneration.
• Alginate and poly(vinyl alcohol) are common biomaterials, but often require modification for improved performance.

Purpose of the Study:

• To design and fabricate novel electrically conductive nanofibrous scaffolds for bone tissue engineering.
• To evaluate the physicochemical and biological properties of these advanced scaffolds.
• To assess their potential for promoting bone regeneration.

Main Methods:

• Grafting aniline monomer onto phenylamine-functionalized alginate (Alg-NH2).
• Electrospinning with poly(vinyl alcohol) (PVA) to create nanofibrous scaffolds.
• Comprehensive characterization including conductivity, morphology (SEM), hydrophilicity, mechanical testing, cytocompatibility (MTT assay), biodegradability, hemolysis, and protein adsorption.

Main Results:

• Scaffolds exhibited excellent hydrophilicity (contact angle 50-60°) and uniform 3D porous structures.
• Electrical conductivities ranged from 1.5 x 10^-3 to 2.7 x 10^-3 S cm^-1.
• Demonstrated acceptable cytocompatibility, enhanced cell adhesion and proliferation, and low hemolysis rate (<2%).
• Showed good protein adsorption capacities (65-68 μgmg^-1).

Conclusions:

• The developed electrically conductive nanofibrous scaffolds possess favorable physicochemical and biological properties.
• These scaffolds show significant potential for successful application in bone tissue engineering.
• The combination of conductivity, biocompatibility, and structural integrity supports their use in bone regeneration strategies.