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不同细胞移植对大鼠心肌梗死后修复的影响 被引量:1

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摘要 目的观察骨髓间充质干细胞(MSCs)和MSCs诱导后分别移植对急性心肌梗死(AMI)修复的影响,比较不同细胞移植的作用。方法获取、培养大鼠骨髓MSCs;5-氮胞苷(5-aza)诱导MSCs,免疫细胞化学法和RT-PCR检测诱导后MSCs特性。结扎大鼠左冠状动脉前降支,建立急性心肌梗死模型,分三个组。对照组:梗死部位中央及四周移植磷酸盐缓冲液(PBS),50μl/点;MSCs移植组和MSCs诱导组:在上述部位分别移植MSCs、诱导的MSCs,2×106个/50μl/点。3周后,超声观察心室腔大小、室壁厚度及运动幅度,检测左室射血分数(EF%)、短轴缩短率(FS%);血流动力学测定左室收缩压(LVSP)、舒张末压(LVEDP)、压力变化最大速率(±dp/dtmax)等指标;免疫组化分析心肌组织中移植细胞情况。结果诱导的MSCs对心肌肌钙蛋白T(cTnT)、连结蛋白43(Cx-43)表达阳性。MSCs移植组、MSCs诱导组与对照组相比,左室前壁运动增强,FS%、LVSP、±dp/dtmax均升高、LVEDP降低(P<0·05),MSCs诱导组改变更明显(P<0·05)。MSCs移植组、MSCs诱导组心肌组织中移植细胞对cTnT、Cx-43表达阳性。结论MSCs移植、MSCs诱导后移植对大鼠AMI均有修复作用,MSCs诱导后移植对AMI心功能的改善作用更明显。
出处 《医药论坛杂志》 2007年第15期30-32,34,共4页 Journal of Medical Forum
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