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Regeneration across preserved peripheral nerve grafts
P J Evans1, S E Mackinnon, T J Best
1Department of Surgery, University of Toronto, Ontario, Canada.
Muscle & Nerve
|October 1, 1995
Summary
Storing nerve grafts at 5°C for up to 3 weeks preserves their function and promotes regeneration. This method yields results comparable to fresh grafts, offering potential for reduced immunosuppression in nerve allografts.
Area of Science:
- Regenerative Medicine
- Neurosurgery
- Transplantation Immunology
Background:
- Nerve grafts are crucial for repairing peripheral nerve injuries.
- Prolonged storage of nerve grafts can compromise their viability and efficacy.
- Optimizing nerve graft storage is essential for successful clinical application.
Purpose of the Study:
- To evaluate the long-term efficacy of stored nerve grafts in a rat model.
- To determine the optimal storage temperature and duration for nerve grafts.
- To assess the potential of stored nerve grafts for reducing host immunosuppression.
Main Methods:
- Syngeneic nerve grafts (3 cm) were stored in Belzer/University of Wisconsin solution at 5°C, 22°C, or 37°C for 6 hours, 24 hours, or 3 weeks.
- Functional recovery was assessed using walking track analysis.
- Histologic and electrophysiologic evaluations were performed 14 months post-transplantation.
Main Results:
- No significant functional differences were observed between storage times and temperatures initially.
- Grafts stored at 5°C demonstrated superior conduction velocities and myelinated fiber counts at 14 months compared to those stored at higher temperatures.
- Nerve grafts stored at 5°C for up to 3 weeks showed results equivalent to fresh grafts.
Conclusions:
- Cold storage at 5°C for up to 3 weeks is a viable method for preserving nerve graft quality.
- This storage protocol supports effective nerve regeneration and functional recovery.
- Stored nerve grafts may reduce the need for immunosuppression in nerve allografts, expanding their clinical utility.