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Vasopressin. Human vasopressin, also called antidiuretic hormone (ADH), arginine vasopressin (AVP) or argipressin, [5] is a hormone synthesized from the AVP gene as a peptide prohormone in neurons in the hypothalamus, [6] and is converted to AVP. It then travels down the axon terminating in the posterior pituitary, and is released from vesicles ...
Vasopressin receptor antagonists (VRAs) are drugs that block vasopressin receptors. Most commonly VRAs are used to treat hyponatremia caused by syndrome of inappropriate antidiuretic hormone secretion (SIADH), congestive heart failure (CHF) and cirrhosis. [2] Somatostatin is a competitive inhibitor.
Early studies showed a link between calcium and the release of vasopressin by the secondary messenger system. [25] Vasopressin levels are reduced after the ingestion of alcohol. [26] The lower levels of vasopressin from the consumption of alcohol have been linked to ethanol acting as an antagonist to voltage-gated calcium channels (VGCCs).
It also participates in calcium regulation by reabsorbing Ca 2+ in response to parathyroid hormone. [1] PTH effect is mediated through phosphorylation of regulatory proteins and enhancing the synthesis of all transporters within the distal convoluted tubule. Arginine vasopressin receptor 2 is also expressed in the DCT.
Vasopressin is used to manage anti-diuretic hormone deficiency. It has off-label uses and is used in the treatment of gastrointestinal bleeding, ventricular tachycardia and ventricular defibrillation. Vasopressin is used to treat diabetes insipidus related to low levels of antidiuretic hormone. It is available as Pressyn.
Vasopressin receptor 2. Vasopressin receptor 2 (V2R), or arginine vasopressin receptor 2 (officially called AVPR2), is a protein that acts as receptor for vasopressin. [5] AVPR2 belongs to the subfamily of G-protein-coupled receptors. Its activity is mediated by the G s type of G proteins, which stimulate adenylate cyclase.
Inhibits vasopressin secretion Water: Inhibits vasopressin secretion Acidifying salts: calcium chloride, ammonium chloride: 1. Arginine vasopressin receptor 2 antagonists: amphotericin B, lithium [13] [14] Inhibits vasopressin's action 5. collecting duct: Selective vasopressin V2 antagonist (sometimes called aquaretics) tolvaptan, [15] conivaptan
Vasopressin receptor antagonist. A vasopressin receptor antagonist (VRA) is an agent that interferes with action at the vasopressin receptors. Most commonly VRAs are used in the treatment of hyponatremia, especially in patients with congestive heart failure, liver cirrhosis or SIADH. [1]