Controlled Magnesium Ion Delivery via Mg-Sputtered Nerve Conduit for Enhancing Peripheral Nerve Regeneration

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Neuroscience

Background:

• Autologous nerve grafting is limited by donor nerve availability and donor site morbidity.
• Biodegradable nerve conduits offer a promising alternative for peripheral nerve repair.
• Magnesium possesses beneficial biocompatibility and neuroprotective properties for nerve regeneration.

Purpose of the Study:

• To develop and evaluate a novel magnesium-sputtered collagen nerve conduit for enhanced peripheral nerve regeneration.
• To address the limitations of rapid magnesium corrosion and material hardness in previous magnesium-based conduits.

Main Methods:

• Sputtering magnesium onto a soft collagen sheet to create a biodegradable nerve conduit.
• Assessing biocompatibility, controlled magnesium ion release, and material softness.
• Evaluating axon regeneration, muscle reinnervation, and functional recovery in a rat sciatic nerve defect model.

Main Results:

• The Mg-sputtered collagen sheet exhibited excellent biocompatibility and controlled magnesium ion release.
• The conduit demonstrated significantly improved axon regeneration and muscle reinnervation compared to controls.
• Enhanced functional recovery was observed in the sciatic nerve defect model using the novel conduit.

Conclusions:

• The innovative Mg-sputtered collagen conduit effectively promotes nerve regeneration and functional recovery.
• This biodegradable nerve conduit represents a significant advancement over traditional nerve grafts and existing conduit technologies.
• The findings suggest transformative potential for Mg-based biodegradable conduits in treating peripheral nerve injuries and other medical applications.