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中国临床药理学与治疗学 ›› 2011, Vol. 16 ›› Issue (10): 1090-1095.

• 基础研究 • 上一篇    下一篇

大豆异黄酮预防离体大鼠心肌缺血再灌注损伤

陶静1,2, 胡杰2, 高琴3, 马善峰3, 关宿东3, 吕正梅1   

  1. 1安徽医科大学组织胚胎学教研室,合肥 230032, 安徽;
    2蚌埠医学院机能实验中心,蚌埠 233030,安徽;
    3蚌埠医学院生理教研室, 蚌埠 233030, 安徽
  • 收稿日期:2011-06-22 修回日期:2011-09-08 出版日期:2011-10-26 发布日期:2011-11-02
  • 通讯作者: 吕正梅,女,副教授,硕士生导师,研究方向:生殖机理。
  • 作者简介:陶静,女,实验师,研究方向:心血管疾病。Tel: 13966061822, E-mail: xtjz13579@sina.com
  • 基金资助:
    蚌埠医学院科研项目(BY00703)

Effects of soy isoflavones preconditioning on myocardial ischem ia/reperfusion injury in isolated hearts of rats

TAO Jing1,2, HU Jie3, GAO Qin3, MA Shan-feng3, GUAN Su-dong3, LV Zheng-mei1   

  1. 1Department of embryology, Anhui Medical University, Hefei 230032, Anhui, China;
    2Centre of Function Experiment,Bengbu Medical College,Bengbu 233030,Anhui,China;
    3Depariment of Physiology, Bengbu Medical College, Bengbu 233030, Anhui, China
  • Received:2011-06-22 Revised:2011-09-08 Online:2011-10-26 Published:2011-11-02

摘要: 目的: 观察大豆异黄酮(SI)预处理对离体大鼠心肌缺血再灌注损伤的影响。方法: 应用Langendorff灌注大鼠离体心脏,停灌/复灌方式制备缺血再灌注模型。SD雄性大鼠40只, 随机分为正常对照组、缺血再灌注组( I/R)、低剂量SI组( L-SI)、中剂量SI组(M-SI)、高剂量SI组( H-SI), L-SI、M-SI、H-SI 组分别予SI 30、60、120 mg·kg-1·d-1灌胃, 第15 天末采集心脏收缩期左心室内压上升的最大变化速率(+LVdp/dtmax)、舒张期左心室内压下降的最大变化速率(-LVdp/dtmax)及左室发展压(LVDP)、左心室舒张末压(LVEDP)及心率与发展压的乘积(RPP)并分析;电镜观察心肌细胞超微结构改变。结果: 与正常对照组比较,I/R组LVEDP明显升高(P<0.01);LVDP,+dp/dtmax, -dp/dtmax,RPP均明显降低(P<0.05,P<0.01)。与I/R组比较,M-SI组LVEDP明显降低(P<0.01),RPP明显升高(P<0.05)。与I/R组比较,H-SI组LVDP、+dp/dtmax、-dp/dtmax均明显升高(P<0.05,P<0.01)。I/R组中,心肌纤维断裂,线粒体肿胀,嵴破坏消失,此变化在M-SI、H-SI预处理组中明显减轻。结论: 中、高剂量SI对离体缺血再灌注大鼠受损伤的心肌有保护作用。

关键词: 心肌再灌注损伤, 大豆异黄酮, 大鼠

Abstract: AIM: To observe the influence of soy isoflavones preconditioning on ischemia/reperfusion injury(IRI) in isolated hearts in rats. METHODS: The ischemia/reperfusion(I/R) model of isolated perfused hearts was established by stopping and reperfusing Krebs-Henseleit (KH) fluid to the hearts of the rats. Forty SD rats were randomly divided into five groups: control group,ischemia/reperfusion group (I/R),three SI treatment groups(L-SI,M-SI,H-SI).0.5%CMC-Na were given in I/R group,SI 30,60,120 mg·kg-1·d-1 were given in L-SI,M-SI,H-SI groups.After 15 days, the changes of maximal rate of the pressure(+LVdp/dtmax) increase,maximal rate of the pressure(-LVdp/dtmax) decrease, left ventricular developed pressure(LVDP), left ventricular end-diastolic pressure (LVEDP)of heart, and rate-pressure product (RPP) were observed and analysis. The ultrastructure of heart cells were oberserved by electron micronscopy. RESULTS: Compared with control group,the level of LVEDP was increased obviously in I/R group(P<0.01), the levels of LVDP,+dp/dtmax, -dp/dtmax,RPP were decreased (P<0.05,P<0.01). Compared with I/R group, the level of LVEDP was decreased obviously in M-SI group(P<0.01), the level of RPP was increased(P<0.05). Compared with I/R group, the levels of LVDP,+dp/dtmax, -dp/dtmax were increased in H-SI group(P<0.05,P<0.01). In I/R group,the mitochondria was swelling, myocardium muscle fibers was breaked and the iliac crest destruction was disappeared,the above changes were reduced obviously in M-SI,H-SI groups. CONCLUSION: M-SI,H-SI behave a protective effect on ischemia/reperfusion inisolated rat hearts.

Key words: Myocardial reperfusion injury, Soy isoflavones, Rat

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