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Fabrication of the Composite Regenerative Peripheral Nerve Interface (C-RPNI) in the Adult Rat
Published on: February 25, 2020
Repairing peripheral nerve defects with tissue engineered artificial nerves in rats
Ai-lin Wei1, Shi-qing Liu, Hai-ying Tao
1Department of Orthopaedics, Renmin Hospital, Wuhan University, Wuhan 430060, China. wal1973@163.com
Chinese Journal of Traumatology = Zhonghua Chuang Shang Za Zhi
|January 31, 2008
Summary
Tissue engineered nerves effectively repaired peripheral nerve defects in rats, showing results comparable to autologous nerve grafts. This approach offers a promising solution for clinical applications in nerve regeneration.
Area of Science:
- Regenerative Medicine
- Biomaterials Science
- Neuroscience
Background:
- Peripheral nerve injuries often result in significant functional deficits.
- Current treatments like autologous nerve grafts have limitations, including donor site morbidity and nerve mismatch.
- Tissue-engineered nerves offer a potential alternative for bridging nerve gaps.
Purpose of the Study:
- To evaluate the efficacy of tissue-engineered nerves in repairing 1.5 cm peripheral nerve defects in a rat model.
- To compare the outcomes of tissue-engineered nerves with autologous nerve grafts and acellular matrix scaffolds.
- To provide data supporting the clinical application of tissue-engineered nerves.
Main Methods:
- Preparation of homologous dermal acellular matrix from rat sciatic nerves.
- Isolation, proliferation, and identification of Schwann cells (SCs) from neonatal rat sciatic nerves.
- Surgical implantation of tissue-engineered nerves (SCs + acellular matrix), acellular matrix alone, autologous nerves, or no graft into 1.5 cm sciatic nerve defects in adult rats (n=40).
- Assessment of functional recovery, muscle weight, nerve electrophysiology, and histological regeneration at 12 weeks post-operation.
Main Results:
- Tissue-engineered nerves (Group A) and autologous nerves (Group C) showed comparable functional recovery and histological regeneration, with axons penetrating the entire graft.
- Acellular matrix scaffolds without SCs (Group B) resulted in limited regeneration and poor functional outcomes.
- The blank control group (Group D) exhibited significant muscle atrophy, foot ulceration, and neuroma formation, with no nerve regeneration.
- Compound muscle action potential (CMAP) was robust in Group A and C, but significantly reduced in Group B and D.
Conclusions:
- Tissue-engineered nerves, comprising Schwann cells and homologous dermal acellular matrix, are effective in repairing long peripheral nerve defects in rats.
- The outcomes achieved with tissue-engineered nerves are comparable to those of autologous nerve grafts.
- This study demonstrates the potential of tissue-engineered nerves for clinical application in peripheral nerve repair.
