Development and evaluation of BDNF-loaded PCL/PVA two-layer nerve guidance conduit with enhanced biomechanical and biological properties for peripheral nerve regeneration

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

The repair of damaged peripheral nerves and the following restoration of functionality remain significant therapeutic challenges. Hollow nerve conduits currently available do not align with the ideal human model. Successfully mending nerve gaps requires incorporating biomimetic and functional features into neural conduit design. In this research, a new two-layer conduit that combines topographic support and controlled growth factor release was developed. We used a two-layered framework to amplify the mechanical reinforcement and reduce the risk of tissue collapse post-grafting. The hollow nerve conduits were fabricated through three-dimensional printing, employing Polycaprolactone (PCL) and a slowly biodegradable nanofiber for the intraluminal brain-derived neurotrophic factors (BDNF)-loaded polyvinyl alcohol (PVA)/PCL core-shell. The contact angle was indicated to show the hydrophilicity properties and degradation rate for biocompatibility. The scanning electron microscope ( SEM) images were analyzed to determine the fiber's diameters, structure morphology, and stem cell adhesion. The performance of core-shell conduits was investigated in human dental pulp stem cells ( hDPSC) culture and their differentiation into Schwann cells (SCs) invitro . The vitality of samples was assessed using SEM, MTT assay, and differentiation potential with real-time and Immunofluorescence staining

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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