Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (20): 3200-3204.doi: 10.3969/j.issn.2095-4344.2015.20.016

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Different thawing methods for cryopreserved rabbit limbs: activity of Schwann cells after thawing

Zhu Ze-xing1, Wang Dan2, Zhang Shu-ming1, Zhao Yan-dong3, Fan Kai-bin4, Zhao Yong-jun5,  Li Hong-jiang6, Li Bo7, Qiao Lin1     

  1. 1Department of Orthopedics, 2Department of Pharmacology, the Second Artillery General Hospital of Chinese PLA, Beijing 100088, China; 2Fourth People’s Hospital of Linfen City, Linfen 041000, Shanxi Province, China; 4Handan Central Hospital, Handan 056001, Hebei Province, China; 5Department of Orthopedics, Affiliated Hospital of Logistics University of People’s Armed Police Force, Tianjin 300162, China; 6Department of Orthopedics, Tieying Hospital of Fengtai Distirct, Beijing 100078, China; 7Department of Orthopedics, Teda Hospital, Tianjin 300457, China
  • Online:2015-05-14 Published:2015-05-14
  • Contact: Qiao Lin, M.D., Associate chief physician, Department of Orthopedics, the Second Artillery General Hospital of Chinese PLA, Beijing 100088, China
  • About author:Zhu Ze-xing, Master, Attending physician, Department of Orthopedics, the Second Artillery General Hospital of Chinese PLA, Beijing 100088, China

Abstract:

BACKGROUND: According to the characteristics of nerve regeneration, the integrity of Schwann cells as regenerative scaffold is very important. Therefore, to save the Schwann cell structure and activity is most important for nerve cryopreservation.
OBJECTIVE: To investigate the optimal thawing procedures for the survival of peripheral nerves in cryopreserved rabbit limbs.
METHODS: Forty hindlimbs from New Zealand White rabbits were randomized into four groups: blank, fast-thawing, slow-thawing and control groups. The control group was subjected to perfusion with protective agent. The severed limbs in fast-thawing and slow-thawing groups were perfused with protective agent followed by gradient cryopreservation and storage in liquid nitrogen for 72 hours. Then, the slow-thawing group was given 
gradient thawing procedures, and the fast-thawing group was subjected to fast thawing in 37 ℃ water bath. After thawing, the tibial nerves were harvested for light microscope, electron microscope, immunofluorescence and confocal microscope observation. SPSS17.0 was used for statistical analysis.
RESULTS AND CONCLUSION: No significant difference was found between the blank and control groups. Nerve fiber breakage, axonal damage and mitochondrial swelling were severer in the fast-thawing and slow-thawing groups than the control and blank groups. In addition, the fast-thawing group was superior to the slow-thawing group. These findings indicate that the fast-thawing method has the minimal effects on the survival of nerve fibers in cryopreserved rabbit limbs.

Key words: Replantation, Cryopreservation, Rewarming

CLC Number: