摘要
目的探讨黄芪多糖对再灌注后心脏血流动力学的影响、作用机制及其与氧自由基的关系。方法应用大鼠离体工作心脏模型进行缺血-再灌注,并设定程序对照组、缺血-再灌注损伤组、黄芪多糖(50mg/mL灌注液)治疗组。结果缺血-再灌注组主动脉压(AP)、左室收缩压(LVSP)、左室内压最大变化速率(±dp/dtmax)显著下降(P<0.05),而左室舒张末期压(LVEDP)、等容舒张期心室内压下降的时间常数(T值)显著增高(P<0.05),心输出量(CO)、每搏量(SV)、心脏指数(CI)、每搏指数(SI)显著减小(P<0.05,或P<0.01),冠脉流量(CF)显著下降(P<0.05),黄芪多糖治疗组其收缩舒张功能均得以良好的恢复,有显著扩冠作用(P<0.05)。缺血-再灌注组心肌组织超氧化物歧化酶(SOD)含量明显下降,LPO含量增高、心肌组织氧自由基波谱信号(OFR)增强,黄芪多糖治疗组SOD含量增高,LPO含量、OFR波谱信号降低,与缺血-再灌注组比较均P<0.05。结论黄芪多糖抗氧自由基的作用可能是其改善心脏血流动力学、抗心肌缺血-再灌注损伤的重要机制。
Objective To research the cardioprotective effect of Astragalus Membranaceus Polysaccharide (AMP) on hemodynamic and oxygen free radicals in myocardial ischemia followed by reperfusion. Methods By using experimental rats cardiac model, rats.were divided into 3 groups: CG (control group), IR (Ischemia-Referpusion) and AMP (Astragalus Membranaceus Polysaccharide)..Results AMP could promote the restoration ofLVSP, ±dp/dtmax, CF, CO, SV, SL CI, and decrease the rising of LVEDP and T value distinctively. The recovery of left ventricular function in AMP group was better than that of the ischemia-reperfusion group, which was accompanied with the significant reduction of oxygen free radicals and increase of superoxide dismutase. Conclusion AMP could attenuate ischemia- reperfusion injury and ameliorate functional recovery in isolated rat hearts.
出处
《中国中医药信息杂志》
CAS
CSCD
2007年第2期33-34,共2页
Chinese Journal of Information on Traditional Chinese Medicine
关键词
黄芪多糖
心肌缺血-再灌注损伤
Astragalus Membranaceus Polysaccharide: ischemia-reperfusion injury