摘要目的 将从大鼠嗅黏膜中获取的鼻嗅黏膜固有层(OLP)组织薄片移植到大鼠脊髓横断区,同时应用神经节苷脂(GM1)治疗,观察其对损伤脊髓的修复作用.方法 采用SD大鼠胸脊髓半切损伤模型,随机分为5组:OLP+GM1组、GM1组、OLP组,单纯损伤组、空白对照组.术后应用电生理学及病理学检查,观察大鼠神经功能恢复情况.结果 OLP+GM1组部分大鼠出现刺激右后肢的逃避反应,其余各组运动功能无明显改善.组织学检查显示,OLP+GM1组嗅组织在移植区成活,并沿着一定路线辐射,核转录因子阳性纤维穿行于移植区.与GM1、OLP,单纯损伤组比较,术后4周OLP+GM1组N1波潜伏期(4.71±0.72)ms(P<0.01);术后8周OLP+GM1组核转录因子(NF)密度(7.31±0.26)×104个/mm2(P<0.05).结论 鼻嗅组织移植及GM1联合治疗脊髓损伤,具有明显的协同作用.

abstractsObjective To observe the effects of olfactory lamina propria (OLP) transplantation and ganglioside GM1 treatment on spinal cord injury (SCI) in rats.Methods Totally 50 healthy pure breed female Sprague-Dawley (SD) rats after spinal cord hemiseetion were randomly divided into 5 groups and were given different treatments: (OLP + GM1) treatment group (group A), GM1 treatment group (group B), OLP treatment group (group C), spinal cord injury but without treatment group (group D) and healthy control group (group E). The recovery of neurological function was evaluated by somatosensory evoked potential (SEP) and pathological examination after surgery. Results In group A, in some rats an escaping response in right hind leg occurred, but in other groups, the motor function was not significantly improved. Histological examination showed that transplanted olfactory lamina propria survived in the transplantation area and expanded on certain routes. NF positive nerve fibers passed through the transplantation area. Compared with group B, C, D, the N1-wave latency was(4.71±0. 72)ms 4 weeks after operation(P<0. 01), and the NF density was(7. 31±0. 26) ×104/mm28 weeks after operation in group A(P<0. 05). Conclusions Olfactory lamina propria (OLP) transplantation and ganglioside GM1 treatment have a synergistic effect on SCI.