中国神经再生研究(英文版) ›› 2016, Vol. 11 ›› Issue (6): 963-970.doi: 10.4103/1673-5374.184496

• 原著:脊髓损伤修复保护与再生 • 上一篇    下一篇

平头螺钉植入构建慢性胸腰段脊髓压迫损伤大鼠模型

  

  • 收稿日期:2015-12-22 出版日期:2016-06-30 发布日期:2016-06-30
  • 基金资助:

    中国军事医学研究基金项目(06ma283)

Establishment of a rat model of chronic thoracolumbar cord compression with a flat plastic screw

Yong Sun1, Li-hai Zhang1, Yang-mu Fu1, Zhi-rui Li1, Jian-heng Liu1, Jiang Peng2, Bin Liu2, Pei-fu Tang1, *   

  1. 1 Department of Orthopedics, Chinese PLA General Hospital, Beijing, China 2 Department of Orthopedics Research Institute, Chinese PLA General Hospital, Beijing, China
  • Received:2015-12-22 Online:2016-06-30 Published:2016-06-30
  • Contact: Pei-fu Tang, M.D., pftang301@163.com.
  • Supported by:

    This study is supported by the Military Medical Research Foundation of China, No. 06MA283.

摘要:

以往脊髓压迫损伤动物模型主要集中在颈段和胸段损伤,而胸腰段较少,而临床中脊髓胸腰段慢性压迫损伤较为常见,所以建立胸腰段脊髓损伤慢性压迫动物模型模拟病理生理变化更有意义。实验通过渐进的螺钉植入的方法构建慢性脊髓压迫动物模型,采用专门设计的平头塑料螺钉植入脊髓,每周拧入一整圈(0.5 mm),持续4周,建立不同压迫程度的胸腰段(T12-S1)脊髓慢性损伤模型大鼠。结果显示,随着螺钉的不断植入,大鼠后肢的运动功能逐渐下降,术后30 min皮质体感诱发电位波幅明显下降,潜伏期明显延长。反映椎管狭窄程度的mirco-CT测量参数逐渐增加,运动神经元严重丧失,形成白质脱髓鞘和空洞。说明以实验采用渐进性螺钉植入法可成功构建胸腰段脊髓慢性压迫损伤大鼠模型,能够模拟慢性脊髓压迫损伤的过程。 

orcid: 0000-0003-4279-1704 (Pei-fu Tang)

关键词: 神经再生, 脊髓损伤, 脊髓压迫症, 慢性损伤, 皮质体感诱发电位, 电生理学, 微计算机体层摄影术, 动物模型, 行为学评价, BBB评分, 病理学

Abstract:

Previous studies of animal models of chronic mechanical compression of the spinal cord have mainly focused on cervical and thoracic lesions, but few studies have investigated thoracolumbar injury. The specific pathophysiological mechanism of chronic thoracolumbar cord injury has not yet been elucidated. The purpose of this study was to improve animal models of chronic thoracolumbar cord compression using the progressive screw. A custom-designed flat plastic screw was implanted in the spinal cord between thoracic vertebrae 12 and lumbar 1 of rats. The screw was tightened one complete turn (0.5 mm) every 7 days for 4 weeks to create different levels of chronic spinal cord compression. Following insertion of the screw, there was a significant decline in motor function of the hind limbs, and severe stenosis of micro-computed tomography parameters in the spinal cord. Cortical somatosensory evoked potential amplitudes were reduced remarkably, and latencies were prolonged at 30 minutes after surgery. The loss of motor neurons in the gray matter was marked. Demyelination and cavitation were observed in the white matter. An appropriate rat model of chronic thoracolumbar cord compression was successfully created using the progressive screw compression method, which simulated spinal cord compression injury.

Key words: nerve regeneration, spinal cord compression, chronic spinal cord injury, cortical somatosensory evoked potential, electrophysiology, micro-computed tomography, animal model, behavioral evaluation, Basso, Beattie and Bresnahan score, histopathology, neural regeneration