Phosphodiesterase-5 inhibitors and the heart: compound cardioprotection?

Phosphodiesterase-5 inhibitors and the heart: compound cardioprotection?
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DOI:
10.1136/heartjnl-2017-312865
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发表时间:
2018-08
期刊:
Heart (British Cardiac Society)
影响因子:
--
通讯作者:
Trafford AW
Trafford AW
中科院分区:
其他
文献类型:
--
作者:
Hutchings DC;Anderson SG;Caldwell JL;Trafford AW

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心力衰竭(HF)和心肌梗塞都需要新型心脏保护剂。越来越多的细胞研究和动物模型证据表明磷酸二酯酶 5 (PDE5) 抑制剂具有保护作用,这种药物通常用于治疗勃起功能障碍和肺动脉高压。 PDE5 抑制剂已被证明可以改善收缩期心力衰竭的收缩功能、消退左心室肥厚、减少心肌梗塞面积并抑制缺血引起的室性心律失常。这些作用的基础是复杂的,但人们日益了解的细胞机制涉及心肌细胞和脉管系统中蛋白激酶-G 的环 GMP 激活。在临床试验中,PDE5 抑制剂可改善收缩性心力衰竭的症状和心室功能,并且不断积累的流行病学数据表明,心血管高危人群的 PDE5 抑制剂使用者的心血管事件和死亡率有所降低。在这里,我们专注于将基础科学转化为临床研究,并报告 PDE5 抑制剂通过多种心脏保护机制发挥作用,包括独立于脉管系统的直接心肌作用。我们的结论是,未来的临床试验在设计时应考虑到这些机制,以确定从这些新型心脏保护剂中获得最大治疗益处的患者亚群。
Novel cardioprotective agents are needed in both heart failure (HF) and myocardial infarction. Increasing evidence from cellular studies and animal models indicate protective effects of phosphodiesterase-5 (PDE5) inhibitors, drugs usually reserved as treatments of erectile dysfunction and pulmonary arterial hypertension. PDE5 inhibitors have been shown to improve contractile function in systolic HF, regress left ventricular hypertrophy, reduce myocardial infarct size and suppress ischaemia-induced ventricular arrhythmias. Underpinning these actions are complex but increasingly understood cellular mechanisms involving the cyclic GMP activation of protein kinase-G in both cardiac myocytes and the vasculature. In clinical trials, PDE5 inhibitors improve symptoms and ventricular function in systolic HF, and accumulating epidemiological data indicate a reduction in cardiovascular events and mortality in PDE5 inhibitor users at high cardiovascular risk. Here, we focus on the translation of underpinning basic science to clinical studies and report that PDE5 inhibitors act through a number of cardioprotective mechanisms, including a direct myocardial action independent of the vasculature. We conclude that future clinical trials should be designed with these mechanisms in mind to identify patient subsets that derive greatest treatment benefit from these novel cardioprotective agents.
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