和厚朴酚对大鼠心肌缺血再灌注损伤的保护作用

被引:12
作者
宜全
谭芳慧
陈伟东
李伟达
张贵平
张根水
机构
[1] 广州医科大学药学院药理学教研室
关键词
心肌缺血再灌注; 和厚朴酚; 心功能; 心律失常; 钙瞬变;
D O I
10.13820/j.cnki.gdyx.20170802.003
中图分类号
R285.5 [中药实验药理];
学科分类号
1008 ;
摘要
目的研究和厚朴酚(Honokiol,HON)对大鼠急性心肌缺血再灌注损伤(I/R)的影响并初步探讨其可能机制。方法 SD大鼠分为3组。对照组假手术+腹腔注射HON 10-7g/kg,I/R组缺血30 min再灌注120min,HON组I/R+腹腔注射HON 10-7g/kg。观测各组大鼠左心室血流动力学、心电图(ECG)和血浆肌酸激酶(CK)的变化,分离成年大鼠心肌细胞,Ion Optix光谱荧光检测系统记录HON对钙瞬变的影响。结果 (1)与对照组比较,I/R组大鼠左心室收缩末压(LVSP)、左心室最大上升速率(+dp/dtmax)、左心室最大下降速率(-dp/dtmax)明显降低(P<0.05),左心室舒张末压(LVEDP)明显升高(P<0.05);心律失常的发生率和血浆肌酸激酶(CK)明显升高(P<0.05)。(2)与I/R组比较,HON组LVSP、+dp/dtmax、-dp/dtmax明显升高(P<0.05),LVEDP明显降低(P<0.05);同时,再灌注时出现心律失常时间明显延迟(P<0.05),再灌注后的前3 min内发生心律失常的时间总和和频率明显下降(P<0.05),室颤的发生率明显减少(P<0.05);血浆CK的活性显著降低(P<0.05)。(3)3μmol/L HON明显降低成年大鼠心肌细胞钙瞬变幅度。结论 HON能改善心肌I/R时心功能降低,并拮抗再灌早期出现的心律失常,机制可能与减少细胞内游离钙、减轻I/R时钙超载有关。
引用
收藏
页码:2276 / 2279
页数:4
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