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首页> 外文期刊>Circulation journal >Production of Reactive Oxygen Species in the Diabetic Heart – Roles of Mitochondria and NADPH Oxidase –
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Production of Reactive Oxygen Species in the Diabetic Heart – Roles of Mitochondria and NADPH Oxidase –

机译:糖尿病心脏中活性氧的产生–线粒体和NADPH氧化酶的作用–

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Reactive oxygen species (ROS) are the main facilitators of cardiovascular complications in diabetes mellitus (DM), and the ROS level is increased in cultured cells exposed to high glucose concentrations or in diabetic animal models. Emerging evidence shows that mitochondria and nicotinamide adenine dinucleotide phosphate (NADPH) oxidase are dominant mechanisms of ROS production in the diabetic heart. Hyperpolarization of the mitochondrial inner membrane potentials and impaired mitochondrial function promote ROS production in the mitochondria of the diabetic heart. Uncoupling proteins are upregulated and may reduce the ROS level by depolarizing the mitochondrial inner membrane potential. NADPH oxidase is another major site of ROS production and its contribution to DM-induced ROS increase has been elucidated not only in vascular smooth muscle cells and endothelial cells, but also in cardiomyocytes. Protein kinase C, angiotensin II, and advanced glycation endproducts (AGEs)/receptor for AGEs can activate NADPH oxidase. Increased intracellular calcium level mediated via the Na+-H+ exchanger and subsequent activation of Ca2+/calmodulin-dependent protein kinase II may also activate NADPH oxidase. This review presents the current understanding of the mechanisms of ROS production, focusing especially on the roles of mitochondria and NADPH oxidase.??( Circ J ?2014; 78: 300–306)
机译:活性氧(ROS)是糖尿病(DM)中心血管并发症的主要促进因素,并且在暴露于高葡萄糖浓度的培养细胞中或在糖尿病动物模型中,ROS水平升高。新兴证据表明,线粒体和烟酰胺腺嘌呤二核苷酸磷酸(NADPH)氧化酶是糖尿病心脏中ROS产生的主要机制。线粒体内膜电位的超极化和线粒体功能受损会促进糖尿病心脏线粒体中ROS的产生。解偶联蛋白被上调,并可能通过使线粒体内膜电位去极化来降低ROS水平。 NADPH氧化酶是ROS产生的另一个主要部位,不仅在血管平滑肌细胞和内皮细胞中,而且在心肌细胞中都阐明了其对DM诱导的ROS增加的贡献。蛋白激酶C,血管紧张素II和AGEs的高级糖基化终产物(AGEs)/受体可以激活NADPH氧化酶。 Na + -H + 交换子介导的细胞内钙水平升高以及随后的Ca 2 + /钙调蛋白依赖性蛋白激酶II的激活也可能激活NADPH氧化酶。这篇综述提供了对ROS产生机理的当前理解,特别是关注线粒体和NADPH氧化酶的作用。(Circ J?2014; 78:300–306)

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