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Enhanced peripheral nerve regeneration by mechano-electrical stimulation.
Youyi Tai1, Thamidul Islam Tonmoy1, Shwe Win1
1Department of Bioengineering, University of California, Riverside, CA, 92521, USA.
NPJ Regenerative Medicine
|October 17, 2023
Summary
This study shows that piezoelectric nerve conduits delivering mechanical stimuli promote significant peripheral nerve regeneration in rats. This approach offers a promising new treatment for critical-sized nerve gaps.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Neuroscience
Background:
- Current treatments for large peripheral nerve defects face limitations.
- Developing effective strategies for nerve regeneration is crucial for restoring function.
Purpose of the Study:
- To evaluate functional material-mediated physical stimuli for peripheral nerve regeneration.
- To assess the efficacy of piezoelectric nanofibers in bridging critical-sized nerve defects.
Main Methods:
- Electrospun piezoelectric poly(vinylidene fluoride-trifluoroethylene) nanofibers were used to create nerve conduits.
- Conduits were implanted in a rat sciatic nerve transection model (15 mm defect).
- Mechanical actuation-activated electrical stimulation (mechano-electrical stimulation, MES) was applied via a shockwave system.
Main Results:
- MES significantly enhanced peripheral nerve regeneration, achieving full axon and myelin reconnection across the nerve gap.
- Unstimulated piezoelectric conduits failed to promote regeneration.
- MES led to reduced myelination damage, increased myelinated nerves, and larger axonal diameters compared to controls.
- Superior functional nerve recovery was observed in the MES group.
Conclusions:
- Piezoelectric nerve conduits delivering MES represent a viable strategy for treating peripheral nerve injuries.
- This non-invasive physical stimulation approach shows significant potential for nerve regeneration and functional recovery.
