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• 基础研究 • 上一篇    下一篇

人参Rb组皂苷对大鼠实验性心肌缺血再灌注损伤的保护作用

曲绍春1,睢 诚1,2,于晓风1,王绚卉1,何小溪1,徐华丽1   

  1. 1.吉林大学药学院药理学教研室,吉林 长春 130021;2.中国药科大学药学院药剂系,江苏 南京 210038
  • 收稿日期:2007-05-31 修回日期:1900-01-01 出版日期:2007-09-28 发布日期:2007-09-28
  • 通讯作者: 徐华丽

Protective effects of Ginsenoside-Rb on experimental myocardial ischemia-reperfusion injury in rats

QU Shao-chun1,SUI Cheng1,2,YU Xiao-feng1,WANG Xuan-hui1,HE Xiao-xi,XU Hua-li1   

  1. 1.Department of Pharmacology,School of Pharmacy,Jilin University,Changchun 130021,China;2.Department of Pharmaceutics,School of Pharmacy,China Pharmaceutical University,Nanjing 210038,China
  • Received:2007-05-31 Revised:1900-01-01 Online:2007-09-28 Published:2007-09-28
  • Contact: XU Hua-li

摘要: 目的:观察人参Rb组皂苷(G-Rb)对大鼠实验性心肌缺血再灌注损伤的保护作用。方法:在体大鼠结扎冠状动脉前降支30 min,再灌注24 h制备实验性心肌缺血再灌注损伤模型,G-Rb按25、50和100 mg•kg-1•d-1给大鼠连续灌胃7 d,假手术组及再灌模型组灌胃0.5%羧甲基纤维素钠,计算心肌梗塞范围(MIS),测定血清天冬氨酸氨基转移酶(AST)、乳酸脱氢酶(LDH)、心肌型肌酸激酶同功酶(CK-MB)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活性及丙二醛(MDA)含量,血浆前列环素(PGI2)及血栓素A2(TXA2)水平,测定血小板聚集活性。结果:与再灌模型组比较,G-Rb 50、100 mg•kg-1组大鼠的MIS缩小(P<0.05或P<0.01),血清AST、LDH、CK-MB活性及MDA含量降低(P<0.05或P<0.01),SOD及GSH-Px活性升高(P<0.05或P<0.01),血浆TXA2水平下降,PGI2水平及PGI2/TXA2比值增高(P<0.05或P<0.01),1、3和5 min的血小板聚集率(PAR)及最大血小板聚集率(MPAR)降低(P<0.05或P<0.01)。结论:G-Rb对大鼠实验性心肌缺血再灌注损伤具有明显保护作用,可能与其增强抗氧化酶活性,减少自由基对心肌的氧化损伤,纠正PGI2/TXA2失衡以及抑制血小板聚集活性等机制有关。

关键词: 心肌缺血再灌注损伤, 心肌酶, 自由基, 血管活性物质, 血小板聚集功能

Abstract: Objective To observe the protective effects of Ginsenoside-Rb(G-Rb) on experimental myocardial ischemia-reperfusion injury in rats.Methods The myocardial ischemia-reperfusion model was induced by 30 min left anterior descending coronary occulusion and 24 h reperfusion in openchest anesthetized rat.The changes of aspartate aminotransferase (AST),lactate dehydrogenase (LDH),MB isoenzyme of creatine kinase(CK-MB),superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities and malondialdehyde(MDA) content in serum,and prostacycline(PGI2) and thromboxane A2 (TXA2) levels in plasma were determined.At the same time,the activity of platelet aggregation was also determined.Results In rats treated with G-Rb (with dose of 50 and 100 mg•kg-1 i.g for 7 d),the MIS was significantly reduced (P<0.05 or P<0.01),the AST,LDH and CK-MB activities in serum and the TXA2 level in plasma were declined (P<0.05 or P<0.01),while PGI2 level in plasma and PGI2/TXA2 ratio were increased signficatly (P<0.05 or P<0.01).In addition,the LPO content in serum was declined,SOD and GSH-Px activities in serum were increased markedly (P<0.05 or P<0.01).The platelet aggregation rate(PAR) at 1,3 and 5 min and maximum platelet aggregation rate(MOAR) were decreased markedly (P<0.05 or P<0.01).Conclusion G-Rb has protective effects on myocardial ischemia-reperfusion injury through improving free radicals metabolism,decreasing TXA2 level in plasma,increasing PGI2 level in plasma and PGI2/TXA2 ratio,and inhibitting the activity of platelet aggregation etc.

Key words: myocardial ischemia-reperfusion injury, myocardialenzyme, free radicals, vasoactive factors, platelet aggregation function

中图分类号: 

  • R285.5