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首页> 外文期刊>Scientific reports. >Nanoparticle-Mediated Targeting of Cyclosporine A Enhances Cardioprotection Against Ischemia-Reperfusion Injury Through Inhibition of Mitochondrial Permeability Transition Pore Opening
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Nanoparticle-Mediated Targeting of Cyclosporine A Enhances Cardioprotection Against Ischemia-Reperfusion Injury Through Inhibition of Mitochondrial Permeability Transition Pore Opening

机译:纳米粒子介导的环孢菌素A通过抑制线粒体渗透过渡孔口开口来增强心肌保护反应缺血再灌注损伤

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Myocardial ischemia-reperfusion (IR) injury limits the therapeutic effects of early reperfusion therapy for acute myocardial infarction (MI), in which mitochondrial permeability transition pore (mPTP) opening plays a critical role. Our aim was to determine whether poly-lactic/glycolic acid (PLGA) nanoparticle-mediated mitochondrial targeting of a molecule that inhibits mPTP opening, cyclosporine A (CsA), enhances CsA-induced cardioprotection. In an in vivo murine IR model, intravenously injected PLGA nanoparticles were located at the IR myocardium mitochondria. Treatment with nanoparticles incorporated with CsA (CsA-NP) at the onset of reperfusion enhanced cardioprotection against IR injury by CsA alone (as indicated by the reduced MI size at a lower CsA concentration) through the inhibition of mPTP opening. Left ventricular remodeling was ameliorated 28 days after IR, but the treatment did not affect inflammatory monocyte recruitment to the IR heart. In cultured rat cardiomyocytes in vitro, mitochondrial PLGA nanoparticle-targeting was observed after the addition of hydrogen peroxide, which represents oxidative stress during IR, and was prevented by CsA. CsA-NP can be developed as an effective mPTP opening inhibitor and may protect organs from IR injury.
机译:心肌缺血再灌注(IR)损伤限制了早期再灌注治疗对急性心肌梗死(MI)的治疗效果,其中线粒体渗透率过渡孔(MPTP)开口起着关键作用。我们的目的是确定多乳酸/乙醇酸(PLGA)纳米粒子介导的分子抑制MPTP开口,环孢菌素A(CSA)的分子的线粒体靶向增强CSA诱导的心脏保护。在体内鼠IR模型中,静脉内注射的PLGA纳米粒子位于IR心肌线粒体。通过抑制MPTP开口,用CSA的再灌注增强的CSA(CSA-NP)与CSA(CSA-NP)掺入的纳米颗粒加工,通过CSA(通过降低CSA浓度下的MI浓度降低),通过抑制MPTP开口。 IR后28天改善左心室重塑,但治疗不影响对红外心脏的炎症单核细胞招募。在体外培养的大鼠心肌细胞中,在加入过氧化氢后观察到线粒体PLGA纳米颗粒靶向,这在IR期间表示氧化应激,并通过CSA预防。 CSA-NP可以作为有效的MPTP开度抑制剂,可以保护器官免受IR损伤。

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