脉络宁对兔肢体缺血再灌注损伤的防护作用

目的　探讨脉络宁对肢体缺血再灌注损伤的防护作用。　方法　将 2 0只家兔随机分为对照组和脉络宁组 ,制备肢体缺血再灌注损伤模型。在即将恢复血流灌注时 ,两组分别自耳缘静脉注射等渗盐水和脉络宁注射液。在再灌注前、后不同时间点上分别测定血清有关生化指标并取胫前肌行光、电镜观察。　结果　对照组再灌注后血清天冬氨酸氨基转移酶 (AST)、乳酸脱氢酶 (LDH)、肌酸激酶 (CK)、丙二醛 (MDA)明显升高 (P <0 .0 1) ,超氧化物歧化酶 (SOD)活力明显下降 (P <0 .0 1)。脉络宁组再灌注后各指标变化不明显 ,而与对照组同期相比 ,差异有非常显著性意义 (P <0 .0 1)。光、电镜观察可见再灌注后对照组组织损伤严重 ,而脉络宁组较轻。　结论脉络宁对肢体缺血再灌注损伤具有明显的防护作用。

Protective effect of Mailuoning on ischemia/reperfusion injury in extremities of rabbits

Objective To study the protective effect of Mailuoning on ischemia/reperfusion injury in extremities. Methods The experimental models of ischemia/reperfusion injury in extremities were produced in 20 healthy adult rabbits, which were randomly divided into control group and Mailuoning group (10 rabbits each). Normal saline and Mailuoning injection were infused intravenously into ear margin of rabbits in the control group and Mailuoning group respectively just before blood reperfusion. At preischemia, two hours post ischemia, one hour post reperfusion and four hours post reperfusion, blood sample was collected from the femoral veins respectively for measurements of aspartate aminotransferase (AST), lactic dehydrogenase (LDH), creatine kinase (CK), malondialdehyde (MDA) and superoxide dismutase (SOD). Meanwhile, the tibialis anterior muscles were harvested for examination of the microstructure and the ultrastructure by using optical microscope and electron microscope. Results The contents of AST, LDH, CK, MDA increased significantly ( P <0.01) and the activity of SOD obviously decreased in the control group after reperfusion ( P <0.01). The indices showed insignificant changes after reperfusion in the Mailuoning group but very significant difference compared with the control group ( P <0.01). The light microscope and electron microscope examinations showed severe tissue injury in the control group but mild in the Mailuoning group after reperfusion. Conclusion Mailuoning has a significant protective effect on ischemia/reperfusion injury in extremities.