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Stromal cell derived factor-1 (sdf-1) targeting reperfusion reduces myocardial infarction in isolated rat hearts

机译:靶向再灌注的基质细胞衍生因子-1(sdf-1)减少了离体大鼠心脏的心肌梗塞

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摘要

Recent studies have shown that stromal cell derived factor-1 (SDF-1), first known as a cytokine involved in recruiting stem cells into injured organs, confers myocardial protection in myocardial infarction, which is not dependent on stem cell recruitment but related with modulation of ischemia-reperfusion (I/R) injury. However, the effect of SDF has been studied only in a preischemic exposure model, which is not clinically relevant if SDF is to be used as a therapeutic agent. Our study was aimed at evaluating whether or not SDF-1 confers cardioprotection during the reperfusion period. Hearts from SD rats were isolated and perfused with the Langendorff system. Proximal left coronary artery ligation, reperfusion, and SDF perfusion in KH buffer was done according to study protocol. Area of necrosis (AN) relative to area at risk (AR) was the primary endpoint of the study. Significant reduction of AN/AR by SDF in an almost dose-dependent manner was noted during both the preischemic exposure and reperfusion periods. In particular, infusion of a high concentration of SDF (25 nM/L) resulted in a dramatic reduction of infarct size, which was greater than that achieved with ischemic pre- or postconditioning. SDF perfusion during reperfusion was associated with a similar significant reduction of infarct size as preischemic SDF exposure. Further studies are warranted to assess the potential of SDF as a therapeutic agent for reducing I/R injury in clinical practice.
机译:最近的研究表明,基质细胞衍生因子-1(SDF-1)首先被称为细胞因子,参与将干细胞募集到受伤的器官中,赋予心肌梗死心肌保护,心肌梗死不依赖于干细胞募集,但与调节有关缺血再灌注(I / R)损伤。但是,仅在缺血前暴露模型中研究了SDF的作用,如果将SDF用作治疗剂,则在临床上不相关。我们的研究旨在评估SDF-1在再灌注期间是否具有心脏保护作用。分离SD大鼠的心脏,并用Langendorff系统灌注。根据研究方案,在KH缓冲液中进行左冠状动脉近端结扎,再灌注和SDF灌注。相对于危险区域(AR)的坏死面积(AN)是研究的主要终点。在缺血前和再灌注期间,SDF以几乎剂量依赖性的方式显着降低了AN / AR。特别是,输注高浓度的SDF(25 nM / L)会导致梗死面积的显着减少,大于缺血性预处理或后处理所能达到的程度。再灌注期间的SDF灌注与缺血前SDF暴露具有相似的显着减小的梗死面积。有必要进行进一步的研究来评估SDF在临床实践中作为减少I / R损伤的治疗剂的潜力。

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