失血性休克复合氰化钠中毒对兔血清氧化应激水平的影响

目的探讨失血性休克复合氰化钠中毒对兔血清氧化应激水平的影响.方法日本大耳白兔15只,随机分为对照、失血性休克、氰化钠中毒、失血性休克复合氰化钠中毒和4-DMAP治疗共5组.动物麻醉后行左侧颈总动脉插管手术,连接三通管和RM6240生理信号系统,建立失血性休克复合中毒模型(血压控制在5.3 kPa).腹腔注射2.5 mg/kg氰化钠及抗氰药物4-二甲氨基苯酚(4-dimethyl aminophenol,4-DMAP)3.2 mg/kg,分别于0.5 h、1 h以及2 h抽取血液样本,采用分光光度法检测血清超氧化物歧化酶(superoxide dismutase,SOD)活力、丙二醛(malondialdehyde,MDA)和活性氧(active oxygen,ROS)的含量.结果失血性休克、氰化钠中毒以及失血复合中毒后SOD活力明显下降(P＜0.01),MDA、ROS含量显著上升(P＜0.01),复合致伤组与单纯休克以及单纯中毒组有明显差异(P＜0.01);4-DMAP干预后SOD活力较复合致伤组明显提高,MDA和ROS的含量则明显降低(P＜0.01).结论失血性休克条件下,氰化钠中毒严重影响兔血清氧化应激水平,4-DMAP能部分改善此作用.

Effects of hemorrhagic shock and sodium cyanide intoxication on rabbit serum oxidative stress

Objective To investigate the effects of sodium cyanide (NaCN) and hemorrhagic shock on the level of serum oxidative stress in rabbits. Methods A total of 15 Japanese white rabbits were randomly divided into 5 groups: sham operation, hemorrhagic shock (HS), NaCN intoxation, HS NaCN and HS NaCN 4-dimethy laminophenol (4-DMAP). The rabbits were anesthetized for left arteria carotis communis cannulation, and connected with three-way tube and RM6240 electronic physiological signal recording system. The models of hemorrhagic shock and/or sodium cyanide intoxation (blood pressure was controlled at 5.3 kPa) were established. At 0.5, 1 and 2 h after the intraperitoneal injection of 2.5 mg/kg NaCN and/or 3.2 mg/kg 4-DMAP, the blood were drawn. The serum superoxide dismutases (SODs), content of malonaldehyde (MDA) and active oxygen (ROS) were detected by spectrophotometric method. Results After HS, NaCN intoxation, HS NaCN, the SODs decreased significantly (P<0.01), the content of MDA and ROS ascended obviously (P<0.01). The SODs ascended significantly (P<0.01), the content of MDA and ROS decreased obviously (P<0.01) after the intervention of 4-DMAP. Conclusion Under the condition of hemorrhagic shock, NaCN can cause severe interference in the level of serum oxidative stress in rabbits, and 4-DMAP can partially improve the interference of NaCN.