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首页> 外文期刊>Journal of cellular and molecular medicine. >iPSC-derived human mesenchymal stem cells improve myocardial strain of infarcted myocardium
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iPSC-derived human mesenchymal stem cells improve myocardial strain of infarcted myocardium

机译:iPSC衍生的人间充质干细胞可改善梗死心肌的心肌应变

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We investigated global and regional effects of myocardial transplantation of human induced pluripotent stem cell (iPSC)-derived mesenchymal stem cells (iMSCs) in infarcted myocardium. Acute myocardial infarction (MI) was induced by ligation of left coronary artery of severe combined immunodeficient mice before 2?×?105 iMSCs or cell-free saline were injected into peri-infarcted anterior free wall. Sham-operated animals received no injection. Global and regional myocardial function was assessed serially at 1-week and 8-week by segmental strain analysis by using two dimensional (2D) speckle tracking echocardiography. Early myocardial remodelling was observed at 1-week and persisted to 8-week with global contractility of ejection fraction and fractional area change in saline- (32.96?±?14.23%; 21.50?±?10.07%) and iMSC-injected (32.95?±?10.31%; 21.00?±?7.11%) groups significantly depressed as compared to sham control (51.17?±?11.69%, P?
机译:我们调查了梗死心肌中人类诱导的多能干细胞(iPSC)衍生的间充质干细胞(iMSCs)心肌移植的全局和区域效应。重度合并免疫缺陷小鼠左冠状动脉结扎可诱发急性心肌梗死(MI),然后将2××105 iMSCs或无细胞盐水注入梗死前壁游离壁。假手术动物不注射。通过使用二维(2D)散斑跟踪超声心动图进行分段应变分析,分别在1周和8周连续评估整体和局部心肌功能。在1周时观察到早期心肌重塑,并持续8周,在生理盐水(32.96?±?14.23%; 21.50?±?10.07%)和iMSC注射(32.95?与假手术对照组相比,±0.01.31%; 21.00±±7.11%)组的抑郁显着降低(51.17±±11.69%,P <0.05); 34.86±±9.82%,P <0.05。但是,与假手术对照(3.74±±3)相比,注射盐水的动物(4.40±±0.62μmm,P << 0.05)观察到心肌扩张,而iMSC(4.29±±0.57μmm)没有观察到。 0.32?mm)。此外,应变分析显示,与假手术对照组相比,iMSC组基底前壁应变显着改善(28.86±±8.16%,P << 0.05),但未注射生理盐水(15.81±±13.92%)。 22.18±±4.13%)。与假对照组(34.88)相比,仅在注射生理盐水(21.50%±5.31%,P 0.05)而不是iMSC(25.67±±12.53%)的情况下,径向应变的多段恶化得到了证实。 ±±5.77%)。心肌应变的改善与心脏梗死前节的间隙中存在相互连接的tel细胞相吻合。我们的研究结果表明,局部注射iMSC可以减轻心室重构,并通过旁分泌驱动对梗死心肌的实质和间质细胞相互作用的新血管生成和心肌变形/顺应性的旁分泌驱动作用,维持整体和局部心肌应变。

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