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Antihypertrophic Effects of Small Molecules that Maintain Mitochondrial ATP Levels Under Hypoxia

机译:在低氧条件下维持线粒体ATP水平的小分子的抗肥大作用

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Since impaired mitochondrial ATP production in cardiomyocytes is thought to lead to heart failure, a drug that protects mitochondria and improves ATP production under disease conditions would be an attractive treatment option. In this study, we identified small-molecule drugs, including the anti-parasitic agent, ivermectin, that maintain mitochondrial ATP levels under hypoxia in cardiomyocytes. Mechanistically, transcriptomic analysis and gene silencing experiments revealed that ivermectin increased mitochondrial ATP production by inducing Cox6a2, a subunit of the mitochondrial respiratory chain. Furthermore, ivermectin inhibited the hypertrophic response of human induced pluripotent stem cell-derived cardiomyocytes. Pharmacological inhibition of importin @b, one of the targets of ivermectin, exhibited protection against mitochondrial ATP decline and cardiomyocyte hypertrophy. These findings indicate that maintaining mitochondrial ATP under hypoxia may prevent hypertrophy and improve cardiac function, providing therapeutic options for mitochondrial dysfunction.
机译:由于认为心肌细胞中线粒体ATP产生受损会导致心力衰竭,因此在疾病条件下保护线粒体并提高ATP产生的药物将是一种有吸引力的治疗选择。在这项研究中,我们确定了小分子药物,包括抗寄生虫药伊维菌素,它们在心肌细胞低氧下维持线粒体ATP的水平。从机理上讲,转录组分析和基因沉默实验表明,伊维菌素通过诱导线粒体呼吸链的一个亚基Cox6a2来增加线粒体ATP的产生。此外,伊维菌素抑制人诱导的多能干细胞衍生的心肌细胞的肥大反应。伊维菌素的靶标之一,importin @b的药理抑制作用显示出针对线粒体ATP下降和心肌肥大的保护作用。这些发现表明,在低氧条件下维持线粒体ATP可以预防肥大并改善心脏功能,为线粒体功能障碍提供治疗选择。

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