Enhancing Functional Recovery after Segmental Nerve Defect Using Nerve Allograft Treated with Plasma-Derived Exosome

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Neuroscience

Background:

• Peripheral nerve injuries often lead to poor functional outcomes.
• Autologous nerve grafts are the current gold standard but have limitations.
• Decellularized nerve allografts show potential but require enhancement for comparable results.

Purpose of the Study:

• To investigate the efficacy of plasma-derived exosomes in enhancing nerve regeneration and functional recovery.
• To evaluate exosomes as a therapeutic addition to decellularized nerve allografts for peripheral nerve repair.

Main Methods:

• Exosomes were assessed for their effect on Schwann cell proliferation and migration in vitro.
• A rat sciatic nerve repair model was established using decellularized nerve allografts with or without exosomes.
• Functional recovery was assessed via electrophysiology and biomechanical testing, complemented by histological analysis.

Main Results:

• Exosomes enhanced Schwann cell viability and migration.
• Nerve allografts treated with exosomes demonstrated functional recovery comparable to autografts.
• Histological analysis revealed similar axonal density, fascicular area, and myelin sheath thickness between treated allografts and autografts.

Conclusions:

• Plasma-derived exosomes combined with decellularized nerve allografts offer a promising strategy for peripheral nerve repair.
• This approach may provide clinical outcomes comparable to autologous nerve grafts.
• Exosome-treated allografts represent a potential off-the-shelf solution for segmental peripheral nerve injuries.