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Aldosterone is the main mineralocorticoid steroid hormone produced by the zona glomerulosa of the adrenal cortex in the adrenal gland. [4][5] It is essential for sodium conservation in the kidney, salivary glands, sweat glands, and colon. [6]
Renin–angiotensin system. The renin-angiotensin system (RAS), or renin-angiotensin-aldosterone system (RAAS), is a hormone system that regulates blood pressure, fluid, and electrolyte balance, and systemic vascular resistance. [2][3] When renal blood flow is reduced, juxtaglomerular cells in the kidneys convert the precursor prorenin (already ...
Mineralocorticoid. Mineralocorticoids are a class of corticosteroids, which in turn are a class of steroid hormones. Mineralocorticoids are produced in the adrenal cortex and influence salt and water balances (electrolyte balance and fluid balance). The primary mineralocorticoid is aldosterone.
Spironolactone is used in the treatment of hyperaldosteronism (high aldosterone levels or mineralocorticoid excess), for instance primary aldosteronism (Conn's syndrome). [46] Antimineralocorticoids like spironolactone and eplerenone are first-line treatments for hyperaldosteronism. [ 46 ]
The adrenal glands (also known as suprarenal glands) are endocrine glands that produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol. [1][2] They are found above the kidneys. Each gland has an outer cortex which produces steroid hormones and an inner medulla.
The mineralocorticoid receptor (or MR, MLR, MCR), also known as the aldosterone receptor or nuclear receptor subfamily 3, group C, member 2, (NR3C2) is a protein that in humans is encoded by the NR3C2 gene that is located on chromosome 4q31.1-31.2. [5] MR is a receptor with equal affinity for mineralocorticoids and glucocorticoids.
Aldosterone synthase is a protein which is only expressed in the zona glomerulosa [5] of the adrenal cortex and is primarily regulated by the renin–angiotensin system. [6] It is the sole enzyme capable of synthesizing aldosterone in humans and plays an important role in electrolyte balance and blood pressure. [7]
Potassium-sparing diuretics or antikaliuretics[1] refer to drugs that cause diuresis without causing potassium loss in the urine. [2] They are typically used as an adjunct in management of hypertension, cirrhosis, and congestive heart failure. [3] The steroidal aldosterone antagonists can also be used for treatment of primary hyperaldosteronism.