中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (49): 7982-7987.doi: 10.3969/j.issn.2095-4344.2015.49.019

• 周围神经损伤动物模型 Animal models of peripheral nerve injury • 上一篇    下一篇

制备坐骨神经损伤大鼠模型:脊髓与局部神经电刺激的修复效果比较

裴保安1,訾金花1,吴立生1,张存华1,陈允震2   

  1. 1临沂市人民医院创伤二科,山东省临沂市 276000;2山东大学附属齐鲁医院,山东省济南市 250012
  • 收稿日期:2015-09-07 出版日期:2015-11-30 发布日期:2015-11-30
  • 通讯作者: 吴立生,硕士,主任医师,硕士生导师,临沂市人民医院,山东省临沂市 276000
  • 作者简介:裴保安,男,1984年生,山东省平邑县人,汉族,山东大学在读博士,主治医师,主要从事周围神经损伤研究。
  • 基金资助:

    临沂市科技攻关课题(201313026)

Establishing rat models of sciatic nerve injury: repair effect of spinal cord electrical stimulation versus local nerve electrical stimulation

Pei Bao-an1, Zi Jin-hua1, Wu Li-sheng1, Zhang Cun-hua1, Chen Yun-zhen2   

  1. 1Second Department of Trauma, Linyi People’s Hospital, Linyi 276000, Shandong Province, China; 2Qilu Hospital of Shandong University, Jinan 250012, Shandong Province, China
  • Received:2015-09-07 Online:2015-11-30 Published:2015-11-30
  • Contact: Wu Li-sheng, Master, Chief physician, Master’s supervisor, Second Department of Trauma, Linyi People’s Hospital, Linyi 276000, Shandong Province, China
  • About author:Pei Bao-an, Studying for doctorate, Attending physician, Second Department of Trauma, Linyi People’s Hospital, Linyi 276000, Shandong Province, China
  • Supported by:

    the Science and Technology Research Project of Linyi City, China, No.201313026

摘要:

背景:周围神经损伤后,损伤远端神经纤维出现Wallerian变性,近端相应节段脊髓出现神经元凋亡,导致轴突再生困难,影响神经损伤修复后的效果。目前针对周围神经损伤的研究大都局限在对损伤局部的修复与刺激,而对近端神经元胞体的研究相对较少。
目的:比较脊髓电刺激与局部电刺激治疗周围神经损伤的疗效,探讨脊髓电刺激促进周围神经损伤修复的机制。
方法:建立大鼠坐骨神经损伤模型,按随机数字表法分为3组,脊髓电刺激组、局部电刺激组和对照组各15只。测定造模后不同时期3组大鼠坐骨神经功能指数、小腿三头肌湿质量、脊髓神经元计数和超微结构、再生神经纤维髓鞘厚度及传导速度。
结果与结论:造模后2周,大鼠坐骨神经功能指数比较脊髓电刺激组>对照组,局部电刺激组>对照组(P < 0.05);造模后4,6,8周,大鼠坐骨神经功能指数比较脊髓电刺激组>局部电刺激组>对照组(P < 0.05)。造模后2周,大鼠小腿三头肌湿重测定脊髓电刺激组>对照组,局部电刺激组>对照组(P < 0.05);造模后4,8周,大鼠小腿三头肌湿质量比较脊髓电刺激组>局部电刺激组>对照组(P < 0.05)。造模后2,4,8周,各组大鼠脊髓前角神经元计数脊髓电刺激组>局部电刺激组>对照组(P < 0.05)。造模后4,8周,各组大鼠再生神经纤维髓鞘厚度、坐骨神经传导速度比较,脊髓电刺激组>局部电刺激组>对照组(P均< 0.05)。提示周围神经损伤后给予相应节段脊髓电刺激,可以有效预防中枢神经元凋亡,促进轴突再生及神经功能恢复,且效果优于局部电刺激。 

 

关键词: 实验动物模型, 周围神经损伤动物模型, 周围神经, 电刺激, 脊髓损伤, 神经再生, 神经传导

Abstract:

BACKGROUND: After peripheral nerve injury, the nerve fibers distal to the injury site exhibited Wallerian degeneration, and neuronal apoptosis also appeared in the spinal cord segments proximal to the injury site, which inhibit axonal regeneration and affect the repair effect of nerve injury. At present, most researches of peripheral nerve injury are limited to the repair and stimulation of local injured nerve, and little is reported on neuron cell body in the nerve fibers proximal to the injury site.
OBJECTIVE: To compare the efficacy on the treatment of peripheral nerve injury between spinal cord electrical 
 
stimulation and local nerve electrical stimulation, and investigate the mechanisms of promoting peripheral nerve injury repair by spinal cord electrical stimulation.
METHODS: Rats were divided into 3 groups according to the random number table: spinal cord electricalstimulation, local nerve electrical stimulation and control groups (n=15 rats/group). Rat models of sciatic nerve injury were established in three groups. Sciatic functional index, triceps wet weight, spinal cord neuron count and ultrastructure, myelin sheath thickness of regenerating nerve fibers and conduction velocity of rats in three groups were measured at different time points after modeling.
RESULTS AND CONCLUSION: At 2 weeks after modeling, rat sciatic functional index was significantly higher in the spinal cord electrical stimulation group or local nerve electrical stimulation group than in the control group (P < 0.05). At 4, 6 and 8 weeks after modeling, rat sciatic functional index was highest in the spinal cord electrical stimulation group, followed by the local nerve electrical stimulation group, and lowest in the control group (P < 0.05). At 2 weeks after modeling, rat triceps wet weight was significantly greater in the spinal cord electrical stimulation group or local nerve electrical stimulation group than in the control group (P < 0.05). At 4 and 8 weeks after modeling, rat triceps wet weight was highest in the spinal cord electrical stimulation group, followed by the local nerve electrical stimulation group, and lowest in the control group (P < 0.05). At 2, 4 and 8 weeks after modeling, spinal cord anterior horn neuron counts were highest in the spinal cord stimulation group, followed by the local nerve electrical stimulation group, and lowest in the control group (P < 0.05). At 4 and 8 weeks after modeling, myelin sheath thickness of regenerating nerve fibers and conduction velocity of sciatic nerve were highest in the spinal cord electrical stimulation group, followed by the local nerve electrical stimulation group, and lowest in the control group (all P < 0.05). These results suggest that electrical stimulation to the corresponding spinal cord segments after peripheral nerve injury can effectively prevent neuronal apoptosis in the central nervous system, promote axonal regeneration and neurological function recovery, and the results are better than those produced by local nerve electrical stimulation.  

 

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