超早期高压氧治疗对脊髓全横断大鼠脊髓水肿及后肢运动功能的影响

目的 探讨超早期高压氧治疗对脊髓全横断损伤大鼠脊髓水肿及后肢运动功能的影响.方法 (1)55只3月龄健康雌性SD大鼠随机分为假手术组(Sham组,15只)、模型组(CSCT组,20只)及高压氧组(HBO组,20只).Sham组仅行椎板切除术,其余2组均行T10椎板水平脊髓完全横向切断术.(2)HBO组于术后第3小时置于动物舱内开始高压氧治疗,10天1疗程,共3疗程,其中第1疗程每天2次,第2、3疗程均每天1次,每疗程休息6 d.(3)分别于建模型后第1～6周末.采用BBB运动功能评分法评价并比较两组大鼠后肢运动功能恢复程度;术后6周末取材,观察各组受损脊髓节段组织含水量变化.结果 CSCT组及HBO组大鼠术后第1-6周末BBB运动功能评分逐渐增高,HBO组在2～6周末的BBB运动功能评分均明显高于CSCT组(P<0.05);术后6周末,CSCT组受损脊髓节段组织含水量较Sham组明显增加(P<0.01),HBO组受损脊髓节段组织含水蛩较CSCT组有所减少(P<0.05).结论 超早期高压氧治疗可可减轻脊髓全横断损伤大鼠脊髓组织水肿,促进后肢运动功能的部分恢复,对脊髓有保护作用.

Abstract：

Objective To evaluate the effect of ultra-early hyperbaric oxygenation on spinal edema and hind limb motor function in rats with complete spinal cord transection. Methods Fifty-five healthy 3-month-old female SD rats were randomly divided into sham-operated group (n=15), complete spinal cord transection group (CSCT group, n=20) and hyperbaric oxygen group (HBO group, n=20). The rats in the sham-operated group underwent only laminectomy, while those in the other 2 groups underwent CSCT at the T10 level. The rats in HBO group were placed in an oxygen chamber 3 h after the operation for 10 days as a treatment course, and 3 treatment courses were administered at the interval of 6 days. In the first treatment course, 2 hyperbaric oxygenation sessions were given daily, and in the following 2 course, only 1 session was given daily. The recovery of hindlimb motor function was evaluated using the open-field Basso-Beattie-Bresnahan (BBB) scoring system once a week for 6 weeks. All the rats were sacrificed 6 weeks after the operation to measure the water content in the injured tissues. Results The BBB scores of CSCT group and HBO group gradually increased with the passage of time after the operation, and from week 2 to week 6, HBO group had significantly higher scores than CSCT group (P<0.05). The water content was markedly increased in CSCT group at 6 weeks after the operation as compared with that in the sham-operated group (P<0.01), and significantly reduced in HBO group in comparison with that in the CSCT group (P<0.05). Conclusion Ultra-early HBO can suppress spinal cord edema and promote hindlimb locomotor recovery in rats with complete spinal cord transection.

Effect of ultra-early hyperbaric oxygenation on spinal edema and hind limb motor function in rats with complete spinal cord transection

Objective To evaluate the effect of ultra-early hyperbaric oxygenation on spinal edema and hind limb motor function in rats with complete spinal cord transection. Methods Fifty-five healthy 3-month-old female SD rats were randomly divided into sham-operated group (n=15), complete spinal cord transection group (CSCT group, n=20) and hyperbaric oxygen group (HBO group, n=20). The rats in the sham-operated group underwent only laminectomy, while those in the other 2 groups underwent CSCT at the T10 level. The rats in HBO group were placed in an oxygen chamber 3 h after the operation for 10 days as a treatment course, and 3 treatment courses were administered at the interval of 6 days. In the first treatment course, 2 hyperbaric oxygenation sessions were given daily, and in the following 2 course, only 1 session was given daily. The recovery of hindlimb motor function was evaluated using the open-field Basso-Beattie-Bresnahan (BBB) scoring system once a week for 6 weeks. All the rats were sacrificed 6 weeks after the operation to measure the water content in the injured tissues. Results The BBB scores of CSCT group and HBO group gradually increased with the passage of time after the operation, and from week 2 to week 6, HBO group had significantly higher scores than CSCT group (P<0.05). The water content was markedly increased in CSCT group at 6 weeks after the operation as compared with that in the sham-operated group (P<0.01), and significantly reduced in HBO group in comparison with that in the CSCT group (P<0.05). Conclusion Ultra-early HBO can suppress spinal cord edema and promote hindlimb locomotor recovery in rats with complete spinal cord transection.