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Related Concept Videos

Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
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...
Hypertension and Regulation of Blood Pressure01:18

Hypertension and Regulation of Blood Pressure

Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
Disorders of the Autonomic Nervous System01:18

Disorders of the Autonomic Nervous System

The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
Raynaud's disease, also known as Raynaud's phenomenon, is a...
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...
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...

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Related Experiment Video

Updated: Jun 23, 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

Hypertension and the bradykinin system.

Jagdish N Sharma1

  • 1Department of Applied Therapeutics, Faculty of Pharmacy, Health Sciences Center, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait. j.n.sharma@hsc.edu.kw

Current Hypertension Reports
|May 16, 2009
PubMed
Summary

The bradykinin system helps lower blood pressure and is crucial for cardiovascular and renal health. Enhancing its activity may offer new treatments for hypertension and related diseases.

Area of Science:

  • Cardiovascular Physiology
  • Renal Physiology
  • Pharmacology

Background:

  • The bradykinin system plays a vital role in regulating blood pressure.
  • It modulates the renin-angiotensin system and vasodilators like nitric oxide.
  • Reduced bradykinin activity is linked to hypertension in clinical and experimental models.

Purpose of the Study:

  • To explore the role of the bradykinin system in blood pressure regulation.
  • To investigate the antihypertensive mechanisms of bradykinin-enhancing therapies.
  • To assess the potential of kallikrein gene delivery and bradykinin agonists for treating cardiovascular and renal diseases.

Main Methods:

  • Review of existing literature on the bradykinin system and hypertension.
  • Analysis of the mechanisms of angiotensin-converting enzyme (ACE) inhibitors and kininase II inhibitors.

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Assessment of Vascular Function in Patients With Chronic Kidney Disease

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Last Updated: Jun 23, 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

Assessing Murine Resistance Artery Function Using Pressure Myography
07:25

Assessing Murine Resistance Artery Function Using Pressure Myography

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Assessment of Vascular Function in Patients With Chronic Kidney Disease
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Assessment of Vascular Function in Patients With Chronic Kidney Disease

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  • Discussion of kallikrein gene therapy and bradykinin agonist development.
  • Main Results:

    • The bradykinin system's blood pressure-lowering effects are well-established.
    • ACE inhibitors and kininase II inhibitors leverage the bradykinin pathway for antihypertensive effects.
    • Kallikrein gene delivery shows promise for treating hypertension and cardiovascular/renal diseases.

    Conclusions:

    • The bradykinin system is a key target for managing hypertension.
    • Kallikrein gene therapy offers a potential therapeutic strategy for cardiovascular and renal disorders.
    • Future development of stable bradykinin agonists could provide novel treatments for these conditions.