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Related Concept Videos

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.
Hormones of the Adrenal Glands01:31

Hormones of the Adrenal Glands

Adrenal hormones play a pivotal role in maintaining the body's electrolyte balance and orchestrating responses to stress, showcasing the intricate functions of the adrenal cortex and medulla.
The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and corticosterone...
Anatomy of the Adrenal Glands01:17

Anatomy of the Adrenal Glands

The adrenal or supra-renal glands, situated above the kidneys and aligned with the twelfth rib, are paired pyramid-shaped structures crucial for the body's stress response. During stress, these glands secrete hormones vital for adaptive physiological reactions.
These glands possess a distinctive yellow tinge due to the stored cholesterol and fatty acids required for hormone synthesis. They are encased in a fibrous capsule and cushioned by fat.
The adrenal gland comprises two distinct regions...
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,...

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Related Experiment Video

Updated: May 26, 2026

Primary Culture of Rat Adrenocortical Cells and Assays of Steroidogenic Functions
04:33

Primary Culture of Rat Adrenocortical Cells and Assays of Steroidogenic Functions

Published on: March 12, 2019

Angiotensin-II-directed glomerulosa cell function in fetal adrenal cells.

W E Rainey1, I M Bird, J I Mason

  • 1Department of Obstetrics & Gynecology, The Green Center for Reproductive Biology Sciences, The University of Texas Southwestern Medical Center at Dallas, Dallas, TX 72535-9032, USA.

The Journal of Steroid Biochemistry and Molecular Biology
|January 6, 2012
PubMed
Summary

Angiotensin II (A-II) supports fetal adrenal cell differentiation, boosting aldosterone production by regulating steroid enzyme expression via AT(1) receptors. This research highlights A-II

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Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation
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Last Updated: May 26, 2026

Primary Culture of Rat Adrenocortical Cells and Assays of Steroidogenic Functions
04:33

Primary Culture of Rat Adrenocortical Cells and Assays of Steroidogenic Functions

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Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation
06:39

Glomerular Outgrowth as an Ex Vivo Assay to Analyze Pathways Involved in Parietal Epithelial Cell Activation

Published on: August 19, 2020

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Cell Biology

Background:

  • Adrenal glomerulosa cell differentiation is crucial for aldosterone production.
  • Long-term regulation of steroid-metabolizing enzymes is key to adrenal steroidogenesis.
  • The role of angiotensin II (A-II) in fetal adrenal cell differentiation requires further investigation.

Purpose of the Study:

  • To investigate the role of angiotensin II (A-II) in regulating adrenal glomerulosa cell differentiation.
  • To determine A-II's ability to support aldosterone production in fetal adrenal cells.
  • To examine the effects of A-II on aldosterone production and aldosterone synthase cytochrome P450 (P450c18) expression.

Main Methods:

  • Primary cultures of fetal bovine adrenal (FBA) cells were utilized.
  • Cells were treated with A-II to assess effects on aldosterone production and P450c18 expression.
  • Receptor binding studies and second messenger assays (inositol phosphates, cAMP) were performed.

Main Results:

  • A-II treatment maintained glomerulosa cell functions and increased aldosterone production 10-fold within 3 days.
  • A-II rapidly and dose-dependently stimulated aldosterone production and enhanced P450c18 activity.
  • Effects were mediated via angiotensin II type 1 (AT(1)) receptors, as blocked by Dup753, and involved stimulation of inositol phosphates and cAMP.

Conclusions:

  • Angiotensin II plays a significant role in the differentiation of fetal adrenal cells into glomerulosa cells.
  • A-II promotes aldosterone production through the regulation of steroid-metabolizing enzyme expression.
  • These findings elucidate a key mechanism in adrenal steroidogenesis regulation.