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Metyrapone, sold under the brand name Metopirone, is a medication which is used in the diagnosis of adrenal insufficiency and occasionally in the treatment of Cushing's syndrome (hypercortisolism). It is part of the steroidogenesis inhibitor class of drugs.
Cortisol synthesis inhibitors: These drugs, such as metyrapone, aminoglutethimide, and ketoconazole, work by blocking the production of cortisol in the adrenal glands. [6] Glucocorticoid receptor antagonists: Mifepristone (RU-486) is the primary example of this class, which directly blocks the action of cortisol at its receptor sites. [3] [6]
Mitotane is an inhibitor of the adrenal cortex.It acts as an inhibitor of cholesterol side-chain cleavage enzyme (P450scc, CYP11A1), and also of 11β-hydroxylase (CYP11B1), 18-hydroxylase (aldosterone synthase, CYP11B2), and 3β-hydroxysteroid dehydrogenase (3β-HSD) to a lesser extent.
Aminoglutethimide (AG), sold under the brand names Elipten, Cytadren, and Orimeten among others, is a medication which has been used in the treatment of seizures, Cushing's syndrome, breast cancer, and prostate cancer, among other indications.
The mechanism of action of aspirin involves irreversible inhibition of the enzyme cyclooxygenase; [17] therefore suppressing the production of prostaglandins and thromboxanes, thus reducing pain and inflammation. This mechanism of action is specific to aspirin and is not constant for all nonsteroidal anti-inflammatory drugs (NSAIDs). Rather ...
Antimineralocorticoid mechanism of action. Aldosterone is a mineralocorticoid which is synthesized in the adrenal glands. [5] When aldosterone is secreted from the adrenal glands, it binds to the mineralocorticoid receptor in the renal tubule cell and forms a complex. [6]
Steroidogenesis.Trilostane inhibits 3β-HSD. Trilostane is a steroidogenesis inhibitor. [1] It is specifically an inhibitor of 3β-hydroxysteroid dehydrogenase (3β-HSD). [1] [15] As a result of this action, trilostane blocks the conversion of Δ 5-3β-hydroxysteroids, including pregnenolone, 17α-hydroxypregnenolone, dehydroepiandrosterone (DHEA), and androstenediol, into Δ 4-3-ketosteroids ...
The peripheral action of methylnaltrexone makes it effective for decreasing the constipating effects of opioids, without interfering with the analgesic effects (of opioids) on the central nervous system. [10] This is the primary characteristic that makes methylnaltrexone behave differently than naltrexone. [11]