七氟醚预处理中核因子-κB的激活对大鼠心肌缺血/再灌注损伤的保护作用

被引:7
作者
覃琴
王琛
朱江
刘霞
姜琳
谢红
机构
[1] 苏州大学附属第二医院麻醉科
关键词
七氟醚; 预处理; 缺血/再灌注损伤; 心肌; 核转录因子-κB;
D O I
暂无
中图分类号
R96 [药理学];
学科分类号
100602 ; 100706 ;
摘要
目的研究七氟醚预处理中NF-κB的激活对大鼠在体心肌缺血/再灌注损伤的保护作用。方法48只雄性SD大鼠,阻断左冠状动脉前降支缺血30 min,开放再灌注120 min,随机分为6组。①对照组进行单纯心肌缺血/再灌注;②DMSO组于心肌缺血前15 min腹腔内注射二甲亚砜(DMSO);③PTN组于缺血前15 min腹腔内注射核转录因子-κB(NF-κB)特异性阻断剂小白菊内酯(PTN)500μg/kg;④七氟醚组于吸入2.5%七氟醚30 min,继之15 min药物排出;⑤PTN+七氟醚组于七氟醚预处理前15 min腹腔内注射PTN;⑥七氟醚+PTN组于七氟醚预处理后即刻腹腔内注射PTN。实验中监测血液动力学变化,实验结束用氯化三苯四氮唑染色法(TPT)测定心肌梗死范围。结果平衡期,各组间心率(HR),平均动脉压(MAP)和心率-收缩压乘积(RPP)无统计学意义(P>0.05)。七氟醚组、PTN+七氟醚组和七氟醚+PTN组在吸入七氟醚期间HR、MAP和RPP明显降低,再灌注1h和2h引起各组MAP和RPP明显降低(P<0.05)。与对照组(52.48±6.04)%相比,七氟醚组的心肌梗死范围显著减少(33.73±5.72)%,而PTN+七氟醚组(52.60±5.01)%和七氟醚+PTN组(52.39±7.00)%的心肌梗死范围明显高于七氟醚组(33.73±5.72)%(P<0.05)。结论七氟醚预处理缩小了大鼠心肌梗死范围,而PTN阻断了七氟醚的心肌保护作用,NF-κB可能参与了七氟醚预处理的心肌保护机制。
引用
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页码:197 / 200 +204
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