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Updated: Jun 22, 2025
Electrically Conductive Scaffold to Modulate and Deliver Stem Cells
Published on: April 13, 2018
Electrical stimulation enhances sciatic nerve regeneration using a silk-based conductive scaffold beyond traditional
Alireza Soltani Khaboushan1,2, Ashkan Azimzadeh1, Saman Behboodi Tanourlouee1
1Pediatric Urology and Regenerative Medicine Research Center, Gene, Cell and Tissue Research Institute, Children's Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419733151, Iran.
Electrical stimulation (ES) with conductive nerve conduits significantly improved sciatic nerve regeneration in rats. This approach enhanced axonal growth and functional recovery, outperforming non-conductive conduits and ES alone.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Neuroscience
Background:
- Peripheral nerve regeneration faces challenges in creating conduits with effective chemical and physical cues.
- Enhancing glial cell function and supporting axonal growth are critical for successful nerve repair.
Purpose of the Study:
- To assess the impact of electrical stimulation (ES) using a conductive nerve conduit on sciatic nerve regeneration.
- To evaluate the efficacy of silk fibroin/Au nanoparticle conduits filled with ADSC-seeded hydrogel in a rat transection model.
Main Methods:
- Fabrication of conductive nerve conduits using silk fibroin and gold nanoparticles (AuNPs).
- Filling conduits with collagen hydrogel containing GFP-positive adipose-derived mesenchymal stem cells (ADSCs).
- Application of conductive/non-conductive conduits with and without ES in rat sciatic nerve injury models, followed by functional and histological analysis.
Main Results:
- The ES + conductive conduit group showed significantly higher S100 and neurofilament expression.
- Conductive scaffolds with ES minimized Wallerian degeneration and improved myelin sheath thickness.
- Locomotor recovery was significantly enhanced in the conductive conduit with ES group compared to controls.
Conclusions:
- Silk/AuNPs conduits filled with ADSC-seeded hydrogel, combined with ES, effectively aid sciatic nerve regeneration.
- ES demonstrated a greater impact on functional recovery than conductive conduits alone, though conduits enhanced ES effects.
- This combined approach shows promise for restoring function in substantial peripheral nerve gaps.
