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硒化钠对高龄大鼠心肌氧化应激的保护作用 被引量:1

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摘要 目的探讨硒化钠对大龄大鼠心肌氧应激及心肌缺血再灌注(I/R)的保护作用。方法采用离体大鼠Langendorff灌注系统建立氧应激灌注及全心I/R模型;建立过氧化氢灌注模型,将30只Wistar大鼠随机分为硒化钠(100 nmol/L)给药组、过氧化氢灌注组和对照组,离体心预灌注20 min,过氧化氢灌注20 min,观察硒化钠对血流动力学指标的影响;建立黄嘌呤联合黄嘌呤氧化酶灌注模型,将30只Wistar大鼠随机分为硒化钠(100 nmol/L)给药组、黄嘌呤联合黄嘌呤氧化酶灌注组和对照组,离体心预灌注20 min,黄嘌呤联合黄嘌呤氧化酶灌注20 min,观察硒化钠对血流动力学指标的影响。建立全心I/R模型,将30只Wistar大鼠随机分为硒化钠(100 nmol/L)组、I/R组和对照组,离体心预灌注20 min,缺血30 min,再灌注30 min,观察硒化钠对血流动力学指标的影响。结果 100 nmol/L硒化钠改善过氧化氢或黄嘌呤灌注模型氧应激引起的左心室收缩功能异常(P<0.05)。缺血前硒化钠(100 nmol/L)给药能明显恢复大鼠I/R前后心脏的左室发展压,左心室舒张末期压亦明显下降(P<0.05)。结论硒化钠能够改善I/R损伤大鼠的心功能,这种保护作用可能与降低氧紧张有关。
出处 《中国老年学杂志》 CAS CSCD 北大核心 2012年第15期3239-3241,共3页 Chinese Journal of Gerontology
基金 吉林省科技发展计划项目(No.20070728-2)
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