黄芪注射液对大鼠失血性休克再灌注肠黏膜NO和ET的影响

目的 :探讨黄芪注射液对失血性休克 再灌注后肠黏膜组织一氧化氮 (NO)和内皮素 (ET)含量的影响。方法 :雄性SD大鼠 32只 ,随机分成 :正常组、模型组、黄芪低剂量组 (黄芪注射液 10g·kg^-1)和黄芪高剂量组 (黄芪注射液 20g·kg^-1)。复制重度失血性休克及复苏动物模型 ,黄芪注射液于再灌注前静脉注入 ,造模完成后观察各组动物肠黏膜病理学变化 ,检测肠黏膜组织乳酸、一氧化氮和和内皮素含量。结果 :病理检查结果显示 :模型组肠黏膜损伤最重 ,黄芪具有保护失血再灌注肠黏膜的作用 ,以黄芪高剂量组效果最佳 ,正常组肠黏膜正常 (P <0 .0 1)。模型组和黄芪低剂量组小肠黏膜组织乳酸含量高于黄芪高剂量组和正常组 (P <0 .0 5 )。模型组和黄芪低剂量组小肠黏膜组织NO含量低于黄芪高剂量组和正常组 (P <0 .0 1)。小肠黏膜组织ET含量以模型组最高 ,与其他 3组比较均有统计学意义 (P <0 .0 5或P <0 .0 1) ,黄芪低剂量组黏膜组织ET含量高于正常组和黄芪高剂量组 (P <0 .0 5 )。结论 :黄芪注射液能减轻大鼠失血性休克再灌注肠黏膜损害 ,可能与其减轻肠黏膜组织血管内皮功能紊乱有关。

Effects of Astragalus membranaceus injection on nitric oxide and endothelin concentration of intestinal mucosa after hemorrhage shock-reperfusion in rats

Objective: To observe the effects of Stragalus membranaceus injection on nitric oxide and endothelin levels of intestinal mucosa in reperfusion injury after hemorrhage shock. Method: 32 SD rats were randomly divided into four groups: normal group, model group, low dosage group, (treated with Astragalus membranaceus 10 g·kg ^-1 );high dosage group( treated with Astragalus membranaceus 20 g·kg ^-1 ). Models of hemorrhagic shock for 60 minutes and reperfusion for 90 minutes were created. The animals were administrated 3 mL therapeutic solution before reperfusion. At the end of study, intestinal pathology was observed, and the concentration of lactic acid (LD), nitric oxide (NO), endothelin(ET) of intestinal mucosa were detected. Result: The intestinal pathology showed that intestinal mucosa epithelial cells damage in model group was severe, in low dosage group was medium, in high dosage group was slight, and no obvious damage was found in normal group. The concentration of LD and NO of small intestine mucous membrane in model group and low dosage group were significantly higher than those in high dosage group and normal group(P <0.05), but there were no significant differences between high dosage group and normal group ( P >0.05). The concentration of ET of small intestine mucous membrane in model group was the highest of the four groups ( P <0.05). The concentration of ET in low dosage group was significantly higher than that in high dosage group and normal group ( P <0.05). but there were no significant differences between high dosage group and normal group ( P >0.05). Conclusion: Stragalus membranaceus injection can reduce small intestine mucous damage by protecting endothelium function in injury after hemorrhage shock-reperfusion.