直流电刺激对鼠坐骨神经切断后脊髓运动神经元凋亡相关基因表达的影响李少华;侯铁胜;顾昕;陈正启;李振华;朱裕昌;史永振;张立国;文会龙【期刊名称】《中国组织工程研究》【年(卷),期】2004(008)011【摘要】背景:周围神经损伤能致脊髓神经元的凋亡,严重影响神经修复后功能的恢复.电刺激能有效促进神经的再生,但对神经元凋亡的影响研究较少.目的:观察直流电场对鼠坐骨神经切断后脊髓运动神经元bcl-2,bcl-X/L,bax及c-jun表达的作用,探讨电刺激对预防细胞凋亡的机制.设计:采用随机对照实验研究.地点和对象:实验在上海同济大学附属铁路医院骨科完成,对象为雄性SD大鼠30只,6周龄,体质量180~220 g.干预:将雄性SD大鼠随机分为对照组和实验组,每组15只大鼠.用10g/L硫喷妥钠(5 mg/100g)腹腔麻醉后,在大鼠右侧臀肌间隙显露坐骨神经,距梨状肌下缘0.5 cm处将坐骨神经切断,近端以5-0尼龙线作双重结扎,远端切除1 cm 后埋入股二头肌中,关闭切口.沿棘突后方正中切口,在T1o~L3右侧椎板及棘突间钝性剥离骶棘肌,切除椎板,将电刺激器阳性盘状电极板置入T10椎板下硬膜囊之腹侧,阴性盘状电极板置入L3椎板上硬膜囊背侧,对照组置入无输出电流的刺激器,分批于术后1,4,7,14,28 d取材.实验操作由同一组人员完成.主要观察指标:脊髓bcl-2,bcl-X/L,bax及c-jun的阳性运动神经元数.结果:坐骨神经切断后4,7,14 d,电刺激组脊髓运动神经元bcl-2阳性数分别为(28.67±1.53),(34.67±1.53),(41.33±1.53)个;bcl-X/L阳性数分别为(23.00±4.36),(32.67±2.52),(44.33±2.08)个,均高于对照组相应阳性数(19.67±1.53),(25.67±2.08),(33.67±1.53);(15.33±0.58),(36.33±2.52),(33.00±4.36).坐骨神经切断后4,7,14,28d,电刺激脊髓运动神经元bax阳性数均低于对照组,坐骨神经切断后7,14,28 d,电刺激脊髓运动神经元c-jun阳性数均少于对照组.结论:直流电刺激对鼠坐骨神经切断后脊髓运动神经元bcl-2,bcl-X/L,bax及c-jun的表达具有调节作用.%BACKGROUND: The injury of peripheral nerve would induce apoptosis ofspinal neuron, which affect severely recovery of nerve function after rehabilitation. It is proved that current stimulation can promote regeneration ofnerve, but it is scarcely reported on the effect of current stimulation onneuron apoptosis.OBJECTIVE: To observe the effect of direct-current field stimulation onbcl-2, bcl-X/L, bax and c-jun gene expression in spinal cord neurons aftertransection of sciatic nerve and to discuss the mechanism of preventive effectof electric stimulation on apoptosis.DESIGN: A randomized controlled experimentconducted.SETTING and PARTICIPANTS: The experiment was performed in theDepartment of Orthopaedics, the Affiliated Railway Hospital, Tongji University. A total of 30 male SD rats(6-week old, body mass of 180-220 g) wereexperimental objects.INTERVENTIONS: Thirty male SD rats were divided into experimentalgroup and control group randomly, 15 rats in each group. After abdominalanaesthetizing with penthiobarbital of 10 g/L concentration, the sciaticnerve was exposed at the interspace of right gluteus. It was transected 0. 5cm inferior to piriformis with proximal end ligtured by two nylon thread of5-0 and distal end cut off by 1 cm length and embedded into biceps formoris. Then the incision was closed. Another median incision was made along spinal process. The muscle on right lamina and spinal process of T10-L3 was blunt dissected. Afterlaminectomy, the discal anode of stimulatorwas put into the abdominal side of the dura under lamina of T10, the cathodedorsal side of dura under lamina of L3. In the control group, stimulatorswithout deferent current were put in the same way. The specimens weretaken 1, 4, 7, 14 and 28 days after operation. Experiments were performed bythe same group of people.MAIN OUTCOME MEASURES: With immunohistochemistry method(ABC method), the gene expression of bcl-2, bcl-X/L, bax and c-jun wouldbe investigated and motoneurons of spinal cord were numbered under lightmicroscope.RESULTS: 4, 7, 14 days after operation in theexperimental group, thenumber of positive spinal cord motor neurons with bcl-2, and bcl-X/L geneexpression were 28.67 ± 1.53, 34.67 ± 1.53, 41.33 ± 1.53 and 23.00 ±4. 36, 32.67 ±2.52, 44. 33 ±2.08, higher than controlled group(19.67 ±1.53,25.67 ± 2.08,33.67 ± 1.53; 15.33 ±0. 58,36. 33 ±2. 52,33.00 ±4.36). 4, 7, 14 and 28 days after operation, the number of positive spinalcord motor neurons with bax were lower than controlled group. 4, 7, 28 daysafter operation, the number of positive spinal cord motor neurons with c-junwere lower than controlled group.CONCLUSION: Direct-current field may modulate the expression of bcl-2,bcl-X/L, bax and c-jun gene after sciatic nerves transection in rats.【总页数】3页(P2125-2127)【作者】李少华;侯铁胜;顾昕;陈正启;李振华;朱裕昌;史永振;张立国;文会龙【作者单位】上海同济大学附属铁路医院骨科,上海市,200072;解放军第二军医大学长海医院骨科,上海市,200433;上海同济大学附属铁路医院骨科,上海市,200072;上海同济大学附属铁路医院骨科,上海市,200072;上海同济大学附属铁路医院骨科,上海市,200072;上海同济大学附属铁路医院骨科,上海市,200072;上海同济大学附属铁路医院骨科,上海市,200072;上海同济大学附属铁路医院骨科,上海市,200072;上海同济大学附属铁路医院骨科,上海市,200072【正文语种】中文【中图分类】R651.2【相关文献】1.直流电对鼠坐骨神经横断致L4-6脊髓前角运动神经元凋亡及bax基因表达的影响 [J], 李少华;侯铁胜2.大鼠坐骨神经切断后丙戊酸钠对相应脊髓运动神经元p-ERK1/2表达的影响 [J], 刘浩宇;吴广智;崔树森3.大鼠坐骨神经切断后丙戊酸钠对相应脊髓运动神经元p-S473-Akt表达的影响[J], 吴广智;刘浩宇;崔树森4.大鼠坐骨神经切断后经皮低频高强度电刺激相应脊髓节段中GAP-43表达的变化[J], 朱春雷;何娜;刘丽丽;马跃5.电刺激对鼠坐骨神经横断后脊髓运动神经元bcl-2,c-jun及bax表达的影响 [J], 李少华;侯铁胜因版权原因,仅展示原文概要,查看原文内容请购买。