RESUMO
Objective To investigate the effect of ligustrazine on autophagy-related proteins Beclin 1,LC3 and P62 after spinal cord ischemia-reperfusion injury.Methods A total of 48 SD rats were randomly divided into sham operation group,model group,ligustrazine group and 3-MA group.The rats were intraperitoneally injected with ligustrazine injection 0.16 mg/kg in the Ligustrazine group,the rats were intraperitoneally injected with 3-methyladenine injection 0.015 mg/kg in the inhibitor group,and the rats were intraperitoneally injected with normal saline of equal volume in the sham operation group and model group.Spinal cord ischemia-reperfusion model was established in all groups except sham-operated group after administration.After molding behavioral scores were scored after 3 and 6 hours of ischemia,and the expression of Beclin 1,LC3 and P62 was detected by immunohis-tochemistry.Results After 3 and 6 hours,compared with the model group,the behavioral score (3 h:2.33 ± 0.58 vs.0.67 ± 0.58,6 h:3.33 ± 0.58 vs.1.33 ± 0.58) of the rats in ligustrazine group significantly increased (P＜0.05).Compared with the model group,the expression of Beclinl (3 h:348.00×104± 0.27×104 vs.659.00×104± 0.11×104;6 h:38.00×104± 0.19×104 vs.557.00×104± 0.26×104),LC3 (3 h:357.00×104± 0.48×104 vs.686.00×104± 0.33×104'6 h:334.00×104± 0.51×104 vs.673.00×104 ± 0.22×104),P62 (3 h:357.00×104 ± 0.48×104 vs.830.00×104 ± 0.48×104;6 h:315.00×104 ± 0.12× 104 vs.591.00× 104± 0.36× 104) in ligustrazine group were significantly decreased (P＜0.05).Conclusions The ligustrazine may regulate autophagy in two directions and protect nerve cells.
RESUMO
Objective to investigate the clinical efficacy of decompression and pedicle screw fixation through posterior approach for complete thoracic spine fracture dislocation.Methods The clinical data of six patients with complete thoracic spine fracture and dislocation treated from September 2002 to June 2016 were analyzed retrospectively by case series study.There were five males and one female,aged 21-67 years old (mean,47.2 years).The injury segments were T3～4 dislocation in one case,T5～6 dislocation in two cases,T6 ～7 dislocation in two cases and T8 ～9 dislocation in one case.There was one case of ASIA grade E and five cases of Grade A,and all of six cases were associated with multiple rib fractures and hemopneumothorax.The companied status was one case of sternal fracture,one case of atlantoaxial complex fractures and three cases of pulmonary contusion.The posterior median incision decompression and pedicle screw system fixation were performed,and the intervertebral bone grafting was conducted after restoration.The surgery time,bleeding volume during surgery,fracture restoration,bone grafting fusion,failure of internal fixation and other complications were recorded.The Visual Analogue Scale (VAS) and American Spinal Injury Association (ASIA) classification were used to assess the pain and neurological function improvement between the preoperative visit and final follow-up visit.Results The surgery time was 150-240 minutes (mean,205 minutes).The bleeding volume during the surgery was 700-2 100 ml (mean,1167 ml).One case was died of pulmonary infection at one week after surgery,the others were followed up for 3-14 months (mean,7.4 months).After operation,five patients were satisfied with the reduction,and the lateral displacement was partially restored in one cases.Five cases of intervertebral bone grafting all had bone fusion.There was no fixation failure.The VAS was (7.4 ± 0.6) points before surgery,(4.5 ± 1.6) points at one week after surgery and (1.8 ± 0.3) points at final visit of follow-up,which had significant difference from the preoperative status (P ＜ 0.05).One case of ASIA grade E had no postoperative aggravation and four cases of grade A had no improvement.Conclusion Posterior decompression and pedicle screw fixation system is optimal choice of treatment for complete thoracic fractures and dislocations for it can attain reduction of fracture and dislocation as well as bone fusion,provide stability for spine and relieve pain.