王江栓 李变锋
【摘要】 目的:研究行为学观察和热辐射缩足反应潜伏期(PWTL)及机械缩足反应潜伏期(MWT)实验筛选建立脊神经选择性结扎(SNL)镜像痛大鼠模型。方法:选取100只成年雄性SD大鼠,将其随机分为SNL组90只和假手术组(Sham组)10只,于术前1 d和术后1、3、7、14、21、28 d进行行为学观察和双足PWTL及MWT实验检测。结果:两组术前行为学观察、PWTL及MWT值比较差异均无统计学意义(P>0.05),术后SNL组手术足均出现添足、咬足等行为学现象,且PWTL值和MWT值术后1~28 d均明显低于Sham组,差异均有统计学意义(P<0.05)。SNL组有14只大鼠为手术足,于术后7 d出现添足、咬足等行为学现象,术后14、21、28 d的MWT值均明显低于Sham组,且术后21、28 d的PWTL值均明显低于Sham组,差异均有统计学意义(P<0.05)。结论:大鼠SNL镜像痛模型筛选和建立成功。
【关键词】 脊神经选择性结扎; 镜像痛; 模型
【Abstract】 Objective:To study choice and establishment of mirror-image pain model of selective spinal nerve ligation (SNL) in rats through the behavior observation,paw withdrawal thermal latency(PWTL) and mechanical withdrawal threshold(MWT) test.Method:100 adult male SD rats were randomly divided into the SNL group for 90 rats and the sham operation group(Sham group) for 10 rats.All rats were observed behaviors,detected PWTL and MWT at the 1 day before operation and the 1,3,7,14,21,28 day after operation.Result:There had no significant differences in behavioral observation,PWTL and MWT values between the two groups at the 1 day before operation(P>0.05).Post-operation,SNL groups operated-foot appeared hit feet,bite feet behavioral phenomenon,and the PWTL values and MWT values were significantly lower compared with Sham group at 1-28 d post-operation,the differences were statistically significant(P<0.05).There were 14 rats of the SNL group appeared hit feet,bite feet behavioral phenomenon in 7 d post-operation at un-operation foot,appeared MWT values were significantly lower compared with Sham group at 14,21,28 d post-operation and PWTL values were significantly lower compared with Sham group at 21,28 d post-operation,the differences were statistically significant(P<0.05).Conclusion:The choice and establishment of mirror-image pain model of SNL rats are successful.
【Key words】 Spinal nerve selective ligation; Mirror-image pain; Model
First-authors address:Luohe Medical College,Luohe 462000,China
doi:10.3969/j.issn.1674-4985.2014.18.010
镜像痛是指当躯体某一组织和部位发生损伤后,导致损伤侧和对侧相应部位均出现疼痛和痛敏现象[1]。临床上一些复杂的区域疼痛综合征及慢性病理性疼痛等均可出现镜像痛[2]。临床治疗效果不佳,动物实验研究较少。目前对镜像痛模型的研究多集中在对坐骨神经损伤后建立神经病理性疼痛模型的基础上筛选镜像痛模型,但在筛选方法、筛选标准、筛选成功率方面鲜见报道。本实验在建立坐骨神经选择性结扎(SNL)神经病理性疼痛模型基础上进行筛选以建立镜像痛模型,为镜像痛的机制研究提供实验依据,现报告如下。
1 材料与方法
1.1 实验动物分组 选取100只成年SD大鼠(漯河医学高等专科学校实验动物中心),雄性,体重250~300 g,将其随机分为SNL组90只和假手术组(Sham组)10只,两组大鼠的一般资料比较差异均无统计学意义(P>0.05),具有可比性。
1.2 制作方法
1.2.1 坐骨神经选择性结扎模型组(SNL组) SNL组90只,制作方法如下……