Bioactivated Oxidized Polyvinyl Alcohol towards Next-Generation Nerve Conduits Development.

Area of Science:

• Biomaterials Engineering
• Tissue Engineering
• Neuroscience

Background:

• Nerve autografts present limitations in nerve function recovery after injury.
• Advanced nerve conduits (NCs) utilizing smart materials are crucial for next-generation nerve repair.
• Partially oxidized polyvinyl alcohol (OxPVA) is explored as a novel biomaterial for nerve conduit fabrication.

Purpose of the Study:

• To evaluate the potential of OxPVA as a bioactivated platform for effective nerve conduits.
• To compare the biological effects of patterned OxPVA scaffolds with and without specific bioactive cues on neuronal cells.
• To assess the influence of scaffold surface ultrastructure and biochemical functionalization on cell behavior.

Main Methods:

• OxPVA-patterned scaffolds were fabricated using a 3D-printed mold.
• Scaffolds were functionalized with IKVAV peptide (covalently bound) or EAK peptide (mechanically incorporated).
• Neuronal SH-SY5Y cell adhesion and proliferation were assessed using MTT assay over 21 days.

Main Results:

• Patterned grooves on scaffolds alone promoted cell colonization.
• OxPVA scaffolds functionalized with EAK peptide (OxPVA+EAK) demonstrated superior bioactivity.
• Significantly higher total cell amounts were observed in the OxPVA+EAK group at 21 days compared to other scaffolds.

Conclusions:

• Patterned OxPVA scaffolds, particularly those incorporating the EAK peptide, show significant potential for nerve regeneration.
• The combination of precise surface patterning and bioactive cues enhances neuronal cell response.
• These findings support the development of OxPVA-based materials for advanced nerve conduit devices.