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Decellularized Biohybrid Nerve Promotes Motor Axon Projections.
Abijeet Singh Mehta1, Sophia L Zhang2,3,4,5, Xinran Xie1
1Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA.
Advanced Healthcare Materials
|September 2, 2024
Summary
Researchers developed advanced biohybrid nerve grafts using decellularized nerve tissue and conductive polymers. These grafts effectively promote directed motor axon growth, offering a promising solution for nerve repair and neurological dysfunction treatment.
Area of Science:
- Biomaterials Science
- Neuroscience
- Tissue Engineering
Background:
- Nerve grafts are crucial for treating neurological dysfunctions by restoring nerve connections.
- Promoting directed axon growth within grafts is a key challenge in nerve regeneration.
Purpose of the Study:
- To develop and characterize biohybrid nerve grafts for enhanced nerve repair.
- To evaluate the efficacy of these grafts in promoting directed motor axon growth.
Main Methods:
- Decellularized rat sciatic nerve was modified via in situ polymerization of poly(3,4-ethylenedioxythiophene) (PEDOT).
- Optimal polymerization conditions (1:1 FeCl3:EDOT, cycled twice) were identified through material characterization.
- Human spinal cord spheroids (hSCSs) were used to assess motor axon outgrowth in the biohybrid nerve conduits.
Main Results:
- The optimized biohybrid nerve exhibited superior conductivity (>0.2 mS cm-1), mechanical alignment, and intact mesostructures.
- The material showed high biocompatibility with cells and blood.
- Biohybrid nerves effectively promoted directed motor axon growth from hSCSs, with further improvement upon Schwann cell seeding.
Conclusions:
- Optimized biohybrid nerve grafts demonstrate excellent conductivity and biocompatibility.
- These grafts successfully facilitate directed motor axon regeneration.
- The study presents a promising strategy for axonal tract reconstruction in human nerve repair applications.
