新生鼠和成年鼠脊髓损伤后胚胎脊髓移植对大鼠损伤脊髓功能恢复的影响

Effect of fetal transplants on functional recovery after spinal cord transecti on in newborn and adult rats

目的研究新生鼠和成年鼠脊髓损伤后胚胎脊髓移植对大鼠损伤脊髓功能恢复的影响。方法将新生鼠和成年鼠腰段脊髓半切洞损伤,取E14胚胎脊髓组织移植到损伤区,手术后4、8、12周,进行组织学检查,联合行为评分,感觉诱发电位,运动诱发电位检查。结果组织学检查发现移植的胚胎脊髓在宿主脊髓中存活。联合行为评分,感觉诱发电位,运动诱发电位潜峰时的恢复,新生鼠移植组均优于成鼠移植组(P<0.05)。结论通过各种功能检查(CBS,SEP,MEP)表明胚胎脊髓移植能够促进脊髓损伤后新生鼠和成鼠运动功能的恢复。

Objective To study the effect of fetal transplants on the fu nctional recovery after spinal cord transection in new born and adult rats. Meth ods The spinal cord tissue at E14 of a rat fetal was transferred into the hemise ction cavity at lumbar spinal cord in the newborn and adult rats. 4, 8, 12 weeks after the operation, spinal cord tissue morphology, combined behavioral score ( CBS), somatosensory evoked potentials (SEP), and motor evoked potentials (MEP) w ere examined. Results The transplanted tissue survived in the host spinal cord. There was a statistical difference in CBS between the newborn graft group and th e adult graft group. The peak latencies of early waves in SEPs and MEPs of the n ewborn graft group were superior to those of the adult graft group (P< 0.05). Co nclusion The assessments of CBS, SEP, and MEP changes suggest that graft of feta l spinal cord tissues can promote recovery of motor function in both newborn and adult rats.