促红细胞生成素促进坐骨神经再生的实验研究

目的 探讨人重组促红细胞生成素(rh-EPO)对大鼠坐骨神经断裂后神经再生的作用.方法 选用健康雄性Wistar大鼠36只,制备大鼠左侧坐骨神经修复模型.实验动物随机分为2组,每组18只,EPO组:腹腔注射rh-EPO 3 000 U/kg;对照组:注射同体积的生理盐水.术后第4周、8周分别进行坐骨神经功能指数(SFI)、生物力学检测、组织学观察、电生理检测、有髓纤维密度密度测定、有髓纤维截面积测定.结果 术后第4周,EPO组和对照组SFI分别为-65.26±3.42和-70.83±4.12,最大抗牵拉强度分别为(3.86±0.29)N/mm2和(3.38±0.21)N/mm2,运动神经潜伏期延迟比分别为2.34±0.23和2.78±0.29,运动神经波幅恢复比分别为0.23±0.05和0.14±0.03;术后第8周,EPO组和对照组SFI分别为-51.34±2.98和-57.23±4.86,最大抗牵拉强度分别为(4.67±0.36)N/mm2和(4.13±0.32)N/mm2,运动神经潜伏期延迟比分别为1.32±0.15和1.62±0.21,运动神经波幅恢复比分别为0.41±0.09和0.26±0.07,神经纤维通过比分别为0.57±0.05和0.38±0.03,有髓纤维截面积恢复比分别为0.81±0.06和0.58±0.03,两组之间差异均有统计学意义(P＜0.05),EPO组均优于对照组.结论 rh-EPO能促进坐骨神经再生和功能恢复.

Abstract：

Objective To investigate the effect of recombinant human erythropoietin(rh-EPO) on the nerve regeneration of adult rats sciatic nerves. Methods Tirty-six healthy male Wistar rats were involved and left sciatic nerve repaired model was used.The experimental rats were divided randomly into two groups:the EPO group and the control group,18 rats in each group.rh-EPO 3 000 U/kg was injected daily into the abdominal in EPO group,and normal saline was injected into the abdominal every day after operation in control group.On 4 and 8 weeks after operation,these items were determined,the sciatic function index (SFI),biomechanics examination,histological observation,electrophysiological examination,myelinated fibers density and sectional area measurement.Results On weeks 4 after operation,the SFI of EPO group and control group were-65.26 ± 3.42 and-70.83 ± 4.12,respectively,the maximum tensile resistance were (3.86 ± 0.29)N/mm2 and (3.38 ± 0.21 )N/mm2,the delayed ratio of latency of motor nerve were 2.34 ± 0.23 and 2.78 ± 0.29,and the recovery ratio of wave amplitude were 0.23 ± 0.05 and 0.14 ± 0.03 respectively.On eight weeks after operation,the SFI of EPO group and control group were-51.34 ± 2.98 and-57.23 ± 4.86,respcetively,the maximum tensile resistance were (4.67 ± 0.36) N/mm2 and (4.13 ± 0.32) N/mm2,the delayed ratio of latency of motor nerve were 1.32 ± 0.15 and 1.62 ± 0.21,the recovery ratio of wave amplitude were 0.41 ± 0.09 and 0.26 ± 0.07,the nerve fibers cross ratio were 0.57 ± 0.05 and 0.38 ± 0.03,and the recovery ratio of sectional area of myelinated fibers were 0.81 ± 0.06 and 0.58 ± 0.03,respectively.Those items in EPO group were significantly superior to those in the control group (P ＜ 0.05 ＝.Conclusion rh-EPO can promote the injured nerve regeneration and improve the recovery of their function.

Experimental study of recombinant human erythropoietin on sciatic nerve regeneration

Objective To investigate the effect of recombinant human erythropoietin(rh-EPO) on the nerve regeneration of adult rats sciatic nerves. Methods Tirty-six healthy male Wistar rats were involved and left sciatic nerve repaired model was used.The experimental rats were divided randomly into two groups:the EPO group and the control group,18 rats in each group.rh-EPO 3 000 U/kg was injected daily into the abdominal in EPO group,and normal saline was injected into the abdominal every day after operation in control group.On 4 and 8 weeks after operation,these items were determined,the sciatic function index (SFI),biomechanics examination,histological observation,electrophysiological examination,myelinated fibers density and sectional area measurement.Results On weeks 4 after operation,the SFI of EPO group and control group were-65.26 ± 3.42 and-70.83 ± 4.12,respectively,the maximum tensile resistance were (3.86 ± 0.29)N/mm2 and (3.38 ± 0.21 )N/mm2,the delayed ratio of latency of motor nerve were 2.34 ± 0.23 and 2.78 ± 0.29,and the recovery ratio of wave amplitude were 0.23 ± 0.05 and 0.14 ± 0.03 respectively.On eight weeks after operation,the SFI of EPO group and control group were-51.34 ± 2.98 and-57.23 ± 4.86,respcetively,the maximum tensile resistance were (4.67 ± 0.36) N/mm2 and (4.13 ± 0.32) N/mm2,the delayed ratio of latency of motor nerve were 1.32 ± 0.15 and 1.62 ± 0.21,the recovery ratio of wave amplitude were 0.41 ± 0.09 and 0.26 ± 0.07,the nerve fibers cross ratio were 0.57 ± 0.05 and 0.38 ± 0.03,and the recovery ratio of sectional area of myelinated fibers were 0.81 ± 0.06 and 0.58 ± 0.03,respectively.Those items in EPO group were significantly superior to those in the control group (P ＜ 0.05 ＝.Conclusion rh-EPO can promote the injured nerve regeneration and improve the recovery of their function.