Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (1): 42-48.doi: 10.3969/j.issn.2095-4344.2016.01.008

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Partition-type spinal cord catheter combined with bone marrow stromal stem cells in the repair of spinal cord transection injury in rats

Zhao Xi-wu, Liu Xin, Yu Da-peng, Rong Hui, Yu Xing-sheng, Yang Chang-sheng, Liu Tong, Zhao Ting-bao   

  1. Department of Spinal Cord Injury, General Hospital of Jinan Military Area Command of Chinese PLA, Jinan 250031, Shandong Province, China
  • Received:2015-11-20 Online:2016-01-01 Published:2016-01-01
  • Contact: Zhao Ting-bao, M.D., Chief physician, Professor, Doctoral supervisor, Department of Spinal Cord Injury, General Hospital of Jinan Military Area Command of Chinese PLA, Jinan 250031, Shandong Province, China
  • About author:Zhao Xi-wu, Master, Attending physician, Department of Spinal Cord Injury, General Hospital of Jinan Military Area Command of Chinese PLA, Jinan 250031, Shandong Province, China

Abstract:

BACKGROUND: There is a high morbidity after spinal cord injury, and the therapeutic strategy is limited to early surgical intervention, medication and post-treatment exercise that only can improve the motor function slightly. However, there is no effective cure method.
OBJECTIVE: To study the effect of partition-type spinal cord catheter combined with bone marrow stromal stem cells on T8 spinal cord transection damage in rats.
METHODS: Fifty rats were randomized into five groups (n=10 per group): group I, T8 spinal cord transection    (5 mm) was made in rats with no treatment; group II, the partition-type tube was inserted into the injured site after modeling; group III, partition-type tube combined with bone marrow stromal stem cells was implanted into the injured site after modeling; group IV, partition-type tube combined with polyglycolic acid fibers was implanted into the injured site after modeling; group V, partition-type tube combined with bone marrow stromal stem cells and polyglycolic acid fibers was implanted into the injured site after modeling.
RESULTS AND CONCLUSION: At 2 and 12 weeks postoperatively, Basso, Beattie and Bresnahan scores were significantly higher in the groups III and IV than the groups I, II, IV (P < 0.05). At 12 weeks postoperatively, the latency of motor evoked potential below the injury plane was significantly decreased in group V compared with groups I, II, III, IV (P < 0.05). Immunohistochemical results displayed that in the groups III and V, regenerated nerve fibers grew positively and arranged orderly among the tubes, and there was no obvious winding phenomenon. Under transmission electron microscopy, a certain number of myelinated nerve fibers were found as bridges among groups. These findings indicate that the partition-type chitosan tube combined with bone marrow stromal stem cells has a good connection with the injured spinal cord a good connection to restore part of electrophysiological properties, accelerate the axon regeneration, recover the motor function, thereby providing a new direction for the treatment of spinal cord injury. 

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