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相关概念视频

Antihypertensive Drugs: Direct Renin Inhibitors01:25

Antihypertensive Drugs: Direct Renin Inhibitors

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The renin-angiotensin-aldosterone system (RAAS) is an intricate physiological pathway involving numerous enzymes and hormones, including renin, angiotensin-converting enzyme (ACE), angiotensin I and II, and aldosterone. Imbalances within this system increase the production of angiotensin II and aldosterone. Increased angiotensin II levels promote vasoconstriction and blood pressure elevation. Concurrently, higher aldosterone levels stimulate sodium and water reabsorption in the kidneys,...
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Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors01:30

Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors

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Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
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Antihypertensive Drugs: Angiotensin II Receptor Blockers01:30

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In the renin-angiotensin-aldosterone system, a hormone called angiotensin II plays a crucial role. It binds to the AT1 receptors in vascular smooth muscles coupled with Gq proteins. The activation of these receptors activates an enzyme called phospholipase C, which releases two molecules: inositol trisphosphate and diacylglycerol. These molecules cause a chain reaction that leads to the phosphorylation of myosin light chains and promotes interaction between actin and myosin, leading to smooth...
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Heart Failure Drugs: Inhibitors of Renin-Angiotensin System01:26

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

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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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Hormonal Regulation01:33

Hormonal Regulation

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The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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Hormonal Regulation of Blood Pressure01:17

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Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction...
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相关实验视频

Updated: Jul 3, 2025

Receptor Autoradiography Protocol for the Localized Visualization of Angiotensin II Receptors
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另一种类型的氨酸-氨酸系统.

Michael Bader1,2,3,4, U Muscha Steckelings5, Natalia Alenina1,2

  • 1Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany (M.B., N.A.).

Hypertension (Dallas, Tex. : 1979)
|February 16, 2024
PubMed
概括

氨酸- ангиотензин系统有一个保护臂,涉及 ангиотензин-(1-7),Mas和AT2受体. 这个手臂可以抵消经典手臂的作用.

关键词:
在AT2受体的AT2受体.阿拉曼迪因 (Alamandine) 是一种药物.癌症 癌症 癌症 癌症 癌症心脏衰竭是因为心脏衰竭.恒常状态 (homeostasis) 是一种恒常的状态.

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科学领域:

  • 心血管生理学心血管生理学
  • 内分泌学 在内分泌学.
  • 分子生物学分子生物学

背景情况:

  • 氨酸 - - ангиотензин系统 (RAS) 对于心血管平衡至关重要.
  • 它的经典臂,由血管素II和AT1受体介导,增加血压并导致组织损伤.
  • 已经确定了RAS的第二个保护臂.

研究的目的:

  • 审查RAS的替代部门的历史发展和当前理解.
  • 为了突出ACE2的作用,血管酶-1-7),Mas,AT2,阿拉曼丁和MrgD.
  • 为了使保护臂与经典的RAS臂形成对比.

主要方法:

  • 关于RAS的历史和当前研究的文献综述.
  • 对激素通路和受体相互作用的分析.
  • 经典和替代RAS武器的比较.

主要成果:

  • 替代RAS臂包括血管素转化酶2 (ACE2),血管素-1-7),马斯受体,AT2受体,阿拉曼丁和与马斯相关的G蛋白结合受体D (MrgD).
  • 这些成分抵消了经典RAS臂的高血压和益纤维化作用.
  • 替代手臂在心血管调节中起着保护作用.

结论:

  • 另一个RAS手臂,涉及ACE2,血管素-1-7),Mas,AT2,阿拉曼丁和MrgD,为经典RAS提供了反调节机制.
  • 了解这种保护臂对于心血管研究和潜在的治疗策略至关重要.
  • 本次审查巩固了关于RAS替代途径的当前知识.