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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Is the cardioprotective effect of the ACE2 activator diminazene aceturate more potent than the ACE inhibitor enalapril on acute myocardial infarction in rats?
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Is the cardioprotective effect of the ACE2 activator diminazene aceturate more potent than the ACE inhibitor enalapril on acute myocardial infarction in rats?

机译:是ACE2活化剂二氨基丙烯酸酯的心脏保护作用比ACE抑制剂enalapril在大鼠中急性心肌梗塞的急性有效吗?

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摘要

Myocardial infarction is a major cause of cardiac dysfunction. All components of the cardiac renin-angiotensin system (RAS) are upregulated in myocardial infarction. Angiotensin-converting enzyme (ACE) and ACE2 are key enzymes involved in synthesis of components of RAS and provide a counter-regulatory mechanism within RAS. We compared the cardioprotective effect of the ACE2 activator diminazene aceturate (DIZE) versus the ACE inhibitor enalapril on post acute myocardial infarction (AMI) ventricular dysfunction in rats. Adult male rats received subcutaneous injections of either saline (control) or isoproterenol (85 mg/kg) to induce AMI. Rats with AMI confirmed biochemically and by ECG, were either left untreated (AMI) or administered DIZE (AMI + DIZE) or enalapril (AMI + enalapril) daily for 4 weeks. DIZE caused a significant activation of cardiac ACE2 compared with enalapril. DIZE caused a significantly greater enhancement of cardiac hemodynamics. DIZE also caused greater reductions in heart-type fatty acid binding protein (H-FABP), beta-myosin heavy chain (beta-MYH), and in heart mass to total body mass ratio. These results indicated that activation of cardiac ACE2 by DIZE enhanced the protective axis of RAS and improved myocardial function following AMI, whereas enalapril was not sufficient to restore all cardiac parameters back to normal.
机译:心肌梗塞是心脏功能障碍的主要原因。心脏肾素 - 血管紧张素系统(RAS)的所有组分在心肌梗死中上调。血管紧张素转化酶(ACE)和ACE2是参与RA的组分的关键酶,并在RAS内提供反调节机制。我们比较了ACE2活化剂二氨基丙酮(DIZE)对急性心肌梗塞(AMI)心室功能障碍的ACE抑制剂enalapril的心脏保护作用。成年雄性大鼠接受过皮下注射盐水(对照)或异丙肾上腺素(85mg / kg)以诱导ami。 AMI的大鼠证实生物化学和ECG,每天留下未经处理的(AMI)或施用DIIZ(AMI + DIZE)或烯丙醇(AMI + ENALAPRIL)4周。与烯丙醇相比,Dize引起了心脏ACE2的显着激活。 Dize引起了显着提高了心脏血流动力学的增强。 Dize还引起了心脏型脂肪酸结合蛋白(H-FABP),β-肌蛋白重链(β-MYH)和心脏质量的更大减少,以及全体质量比。这些结果表明,通过Dize激活Cize增强了RA的保护轴和改善了AMI后的心肌功能,而Enalapril则不能将所有心脏参数恢复到正常。

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