Journal
NEURAL REGENERATION RESEARCH
Volume 16, Issue 9, Pages 1829-+Publisher
WOLTERS KLUWER MEDKNOW PUBLICATIONS
DOI: 10.4103/1673-5374.306095
Keywords
angiogenesis; chitosan; electrical conduction; graphene oxide; regeneration; repair; scaffold; spinal cord injury
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Funding
- National Key Research and Development Program of China [2018YFC1106800]
- Sichuan Science and Technology Project of China [2018JY0535]
- Talents Training Program of Army Medical University of China [2019MPRC021/SWH2018QNWQ-05]
- Research on Key Technologies of Photoelectromagnetic Acoustic Intensity Brain of China [AWS16J025]
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The study demonstrated that a conductive graphene oxide composited chitosan scaffold could induce nerve cells growth and promote neural tissue regeneration, suggesting potential for repairing damaged nerve tissue.
The study illustrates that graphene oxide nanosheets can endow materials with continuous electrical conductivity for up to 4 weeks. Conductive nerve scaffolds can bridge a sciatic nerve injury and guide the growth of neurons; however, whether the scaffolds can be used for the repair of spinal cord nerve injuries remains to be explored. In this study, a conductive graphene oxide composited chitosan scaffold was fabricated by genipin crosslinking and lyophilization. The prepared chitosan-graphene oxide scaffold presented a porous structure with an inner diameter of 18-87 mu m, and a conductivity that reached 2.83 mS/cm because of good distribution of the graphene oxide nanosheets, which could be degraded by peroxidase. The chitosan-graphene oxide scaffold was transplanted into a T9 total resected rat spinal cord. The results show that the chitosan-graphene oxide scaffold induces nerve cells to grow into the pores between chitosan molecular chains, inducing angiogenesis in regenerated tissue, and promote neuron migration and neural tissue regeneration in the pores of the scaffold, thereby promoting the repair of damaged nerve tissue. The behavioral and electrophysiological results suggest that the chitosan-graphene oxide scaffold could significantly restore the neurological function of rats. Moreover, the functional recovery of rats treated with chitosan-graphene oxide scaffold was better than that treated with chitosan scaffold. The results show that graphene oxide could have a positive role in the recovery of neurological function after spinal cord injury by promoting the degradation of the scaffold, adhesion, and migration of nerve cells to the scaffold. This study was approved by the Ethics Committee of Animal Research at the First Affiliated Hospital of Third Military Medical University (Army Medical University) (approval No. AMUWEC20191327) on August 30, 2019.
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