缺血后处理与大鼠心肌能量代谢的关系

被引:11
作者
李旭光 [1 ]
康少平 [1 ]
田立强 [1 ]
董嘉良 [1 ]
张敏 [2 ]
张艳君 [1 ]
康英姿 [1 ]
于公元 [1 ]
机构
[1] 天津医科大学生物化学教研室
[2] 天津武警医学院生物化学教研室
关键词
心肌再灌注损伤; 缺血后处理; 三磷酸腺苷; 腺苷;
D O I
暂无
中图分类号
R363 [病理生理学];
学科分类号
100104 ;
摘要
目的:探讨缺血后处理对大鼠体外心脏缺血再灌注损伤的作用。方法:48只Wistar大鼠,随机均分为2组;缺血后处理组、缺血再灌注组(对照组)。采用大鼠体外心脏Langendorff灌流模型,缺血后处理组全心缺血30 min后,再灌注30 s后,缺血30 s,反复3次,然后持续灌注57 min;对照组全心缺血30 min,再灌注60 min。TTC染色观察心肌梗死面积,高压液相色谱仪(HPLC)分析心肌组织中ATP的含量、灌流液腺苷(adenosine,ADO)含量,测定超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽还原酶(GR)活性。结果:缺血后处理可减少心肌梗死面积[(15.32±2.05)%],与对照组比较[(40.21±3.24)%],差异有统计学意义(P<0.05);减少ATP降解[(3.32±0.63)μmol/g],与对照组比较[(4.73±0.59)μmol/g]差异有统计学意义(P<0.05);心肌冠状动脉流出液中ADO清除速率[(4.33±1.87)nmol.min-1.g-1]小于对照组[(6.17±1.80)nmol.min-1.g-1],P<0.05;心肌SOD、CAT和GR酶活性均高于对照组(P<0.05),有更大的抗氧化能力。结论:缺血后处理可延缓ADO清除,减少ATP的降解,减轻活性氧的损伤作用而发挥心肌保护作用。
引用
收藏
页码:936 / 939
页数:4
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