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Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
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Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...

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肌动脉梗塞后雌激素受体-β淘汰小鼠心力衰竭的死亡率增加和恶化

Theo Pelzer1, Paula-Anahi Arias Loza, Kai Hu

  • 1Department of Medicine, University of Würzburg, Würzburg, Germany. pelzer_t@klinik.uni-wuerzburg.de

Circulation
|March 23, 2005
PubMed
概括

雌激素受体β (ERbeta) 在缓解心力衰竭方面起着至关重要的作用. 在雌性小鼠中,它的缺失显著增加了死亡率,并使心肌梗塞后心力衰竭标志物恶化.

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科学领域:

  • 心血管生物学 心血管生物学
  • 内分泌学 在内分泌学.
  • 分子医学是分子医学.

背景情况:

  • 慢性心力衰竭妇女的较低死亡率表明女性性激素,特别是雌激素的作用.
  • 雌激素的作用是由雌激素受体 (ER) 亚型介导的:ERalpha和ERbeta.
  • 这项研究调查了ERbeta在心肌梗塞 (MI) 后慢性心力衰竭发展中的特定作用.

研究的目的:

  • 确定雌激素受体β (ERbeta) 在慢性心力衰竭的发展中的作用.
  • 评估ERbeta缺乏对雌性小鼠实验性心肌梗塞后死亡率和心脏功能的影响.

主要方法:

  • 雌性ERbeta零 (BERKO) 和野生型 (WT) 鼠被卵巢切除并用17β-雌激醇治疗.
  • 小鼠接受了慢性前心肌梗塞 (MI) 或假手术.
  • 心脏功能,死亡率,体重,水分保留和蛋白质表达 (pro-ANP,福兰班) 被评估为MI后8周.

主要成果:

  • 与心脏病发作后的WT小鼠相比,ERbeta null小鼠的死亡率显著增加 (42%与23%相比).
  • 两种基因型都显示出相似的左心室重塑和心脏病发作大小,但ERbeta无细胞小鼠的体重增加和液体保留.
  • 埃尔贝塔缺乏导致了更高的腹腔亲ANP和心房 natriuretic血清水平,并增加了索兰班的表达.

结论:

  • 系统性删除ERbeta会加剧心力衰竭标志物,并增加MI后雌性小鼠的死亡率.
  • 缺少ERbeta会影响Ca2+处理蛋白的表达,导致心力衰竭.
  • 需要进一步的研究来澄清ERbeta和ERalpha在与心力衰竭相关的心脏和血管效应中的作用.