脑源性神经营养因子前体蛋白干扰促进脊髓全横断大鼠运动功能恢复

目的 探讨脑源性神经营养因子(brain derived neurotrophic factor,BDNF)前体(proBDNF)在脊髓损伤中的作用.方法 建立SD大鼠T10脊髓全横断损伤模型.以随机数字表法将动物分为抗体封闭组和人工脑脊液对照组.抗体封闭组应用椎管内释放proBDNF抗体以封闭脊髓内proBDNF,采用免疫组化评价proBDNF抗体封闭的效果,行为学BBB评分研究proBDNF鞘内封闭对脊髓全横断大鼠运动功能的影响.结果 在全横断大鼠椎管内注入脑脊液的对照组没有观察到明显的运动功能改进,而proBDNF抗体鞘内封闭不仅有效减少脊髓内proBDNF,而且明显改善大鼠行为功能.proBDNF抗体封闭组行为学BBB评分较人工脑脊液对照组明显升高.结论 通过proBDNF抗体鞘内封闭减少脊髓内proBDNF能有效促进全横断脊髓损伤大鼠行为功能部分恢复.

Effect of brain derived neurotrophic factor precursor block on improvement of motor function in rats subjected to cord transaction

Objective To investigate the role of precursor of brain derived neurotrophic factor (proBDNF) in the improvement of motor function of rats subjected to cord transection. Methods Spinal cord transection was performed at T10 level. The rats were divided into sham operation group and artificial cerebrospinal fluid group. Then, the rats were subjected to proBDNF antibody treatment. The efficiency of proBDNF block was also determined by immunohistochemistry. BBB scale scores were used to e-valuate the effect of ProBDNF block on the motor function of the rats with spinal cord transection. Results Compared with control rats, proBDNF treatment showed a marked down-regulation of proBDNF protein in the spinal cord and could significantly improve the motor function. BBB scores in proBDNF block group was higher than those in artificial cerebrospinal fluid group. Conclusion The proBDNF block is available to the recovery of the motor function in hindlimbs in cord transected rats, suggesting that proBDNF could be as a member of candidate molecules for SCI therapy in the future.