摘要
目的建立一种损伤更小、存活率更高、适用范围更广的改良的脊髓半横断损伤大鼠模型。方法将20只雌性SpragueDawley大鼠随机分为常规脊髓半横断模型组和改良脊髓半横断模型组,分别采用常规和改良的脊髓半横断法制备大鼠脊髓损伤模型,分别于术后1 d、3 d、1周和2周通过Basso-Beattie-Bresnahan(BBB)运动功能学评分评价大鼠后肢运动功能的恢复情况,并结合手术时间、术中出血量、术中脊髓后正中线定位以及二次手术显露脊髓的成功率等主要参数,比较2组间的差异。结果改良脊髓半横断模型组较常规脊髓半横断模型组手术时间更短,术中出血量明显减少,BBB运动功能学评分更优,术中脊髓后正中线定位更准确,二次手术显露脊髓的成功率更高。在改良的脊髓半横断模型基础上,成功建立了脊髓瘢痕组织移植模型,成功率可达70%以上。结论改良的脊髓半横断模型在手术时间、术中出血量、运动功能学评分、术中脊髓后正中线定位及二次手术显露脊髓方面均表现出明显优势,更适用于脊髓损伤研究,尤其是非急性期脊髓损伤研究。
Objective To establish an improved hemisection model of spinal cord injury（SCI）in rats with less severe injury and increased survival rate. Methods Female Sprague-Dawley rats（n =20）were randomly divided into 2 groups：standard and improved hemisection model of SCI. Basso-Beattie-Bresnahan（BBB）scores were carried out to determine the hindlimb locomotor function at 1 d,3 d,1 week and 2 weeks post SCI,respectively. In addition,duration of operation,blood loss,location of posterior midline,and success rate of spinal cord exposure during the second surgery were used as the main parameters to evaluate the significance of the new model. Results Compared with the standard hemisection model,the improved hemisection model of SCI exhibited shorter duration of operation,less blood loss,higher BBB score,more accurate location of posterior midline,and higher success rate of spinal cord exposure during the second surgery. Based on the improved hemisection model of SCI,transplantation model of scar tissue in spine cord was then successfully constructed with a success rate above 70%. Conclusion The improved hemisection model of SCI shows significant advantages in many aspects related to the operation,which is applicable to the study of SCI,especially the non-acute SCI.
出处
《中国医科大学学报》
CAS
CSCD
北大核心
2017年第3期223-226,237,共5页
Journal of China Medical University
基金
辽宁省自然科学基金(2013021032)
关键词
脊髓损伤
大鼠模型
改良
spinal cord injury
rat models
modification
