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Related Concept Videos

Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors01:30

Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors

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...
Antihypertensive Drugs: Angiotensin II Receptor Blockers01:30

Antihypertensive Drugs: Angiotensin II Receptor Blockers

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...
Antihypertensive Drugs: Direct Renin Inhibitors01:25

Antihypertensive Drugs: Direct Renin Inhibitors

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,...
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System01:26

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...
Hormonal Regulation01:33

Hormonal Regulation

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.
Antihypertensive Drugs: Action of β1 Blockers01:17

Antihypertensive Drugs: Action of β1 Blockers

β1-receptors are primarily located in the heart and kidneys. In cardiac myocytes, these receptors interact with neurotransmitters released by the sympathetic nervous system during heightened activity or danger. As a result, β1-receptors get activated, initiating a series of biochemical processes. Excessive activation of beta receptors due to chronic stress can abnormally increase heart rate and contractility, resulting in high blood pressure or hypertension. To counteract this, β1-blockers...

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Related Experiment Video

Updated: Jul 5, 2026

Receptor Autoradiography Protocol for the Localized Visualization of Angiotensin II Receptors
12:03

Receptor Autoradiography Protocol for the Localized Visualization of Angiotensin II Receptors

Published on: June 7, 2016

New angiotensins.

Jasmina Varagic1, Aaron J Trask, Jewell A Jessup

  • 1The Hypertension and Vascular Research Center, Department of Physiology and Pharmacology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA. jvaragic@wfubmc.edu

Journal of Molecular Medicine (Berlin, Germany)
|April 26, 2008
PubMed
Summary
This summary is machine-generated.

The renin-angiotensin system (RAS) is complex, with angiotensin-(1-7) balancing angiotensin II in cardiovascular health. Angiotensin-(1-12) emerges as a novel precursor peptide.

More Related Videos

Nitropeptide Profiling and Identification Illustrated by Angiotensin II
07:31

Nitropeptide Profiling and Identification Illustrated by Angiotensin II

Published on: June 16, 2019

Related Experiment Videos

Last Updated: Jul 5, 2026

Receptor Autoradiography Protocol for the Localized Visualization of Angiotensin II Receptors
12:03

Receptor Autoradiography Protocol for the Localized Visualization of Angiotensin II Receptors

Published on: June 7, 2016

Nitropeptide Profiling and Identification Illustrated by Angiotensin II
07:31

Nitropeptide Profiling and Identification Illustrated by Angiotensin II

Published on: June 16, 2019

Area of Science:

  • Cardiovascular Physiology
  • Endocrinology
  • Renal Physiology

Background:

  • The renin-angiotensin system (RAS) is a complex hormonal cascade regulating cardiovascular and renal functions.
  • Evidence highlights the critical balance between angiotensin II and angiotensin-(1-7) in cardiovascular pathophysiology.
  • Novel peptides and pathways are continually being discovered, expanding our understanding of the RAS.

Purpose of the Study:

  • To review the role of angiotensin-(1-7) in cardiovascular function and growth.
  • To introduce angiotensin-(1-12) as a potential novel precursor within the RAS.
  • To emphasize the importance of peptide balance in cardiovascular health.

Main Methods:

  • Literature review of recent studies on the RAS.
  • Analysis of the biochemical cascade involving novel peptides.
  • Focus on functional relevance of angiotensin-(1-7) and angiotensin-(1-12).

Main Results:

  • Angiotensin-(1-7) plays a significant role in cardiovascular function and growth.
  • Angiotensin-(1-12) has been identified as a potential precursor to other angiotensin peptides.
  • The balance between angiotensin peptides is crucial for cardiovascular homeostasis.

Conclusions:

  • The RAS is a dynamic system with newly identified components influencing cardiovascular and renal health.
  • Understanding the roles of angiotensin-(1-7) and angiotensin-(1-12) offers new insights into cardiovascular regulation.
  • Further research into novel angiotensin precursors like angiotensin-(1-12) is warranted.