vasopressin

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vasopressin

(văz'ōprĕs`ĭn): see antidiuretic hormoneantidiuretic hormone
, polypeptide hormone secreted by the posterior pituitary gland. Its principal action is to regulate the amount of water excreted by the kidneys. Antidiuretic hormone (ADH), known also as vasopressin, causes the kidneys to resorb water directly from the
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Vasopressin

 

a hormone secreted by the posterior lobe of the hypophysis; causes constriction of vessels (acting on the smooth muscles of their walls) and increased blood pressure (pressor effect); also maintains at a proper level the reverse absorption of water in the straight tubules of the kidneys, that is, decreases the quantity of urine discharged (antidiuretic effect). Vasopressin is formed in the neurosecretory cells of the anterior nuclei of the hypothalmus, from which it enters the hypophysis along the nerve fibers. The antidiuretic action of the hormone is one of the factors that maintain the relative constancy of the water-salt metabolism in the bodies of vertebrate animals and man. A deficiency of vasopressin may lead to diabetes insipidus, in which discharge of urine is sharply increased. Vasopressin is contained in preparations obtained from the posterior hypophysis—Pituitrin and adiurekrin. Chemically, vasopressin is an octapeptide constructed of eight amino acids (in the majority of animals and in humans vasopressin consists of cysteine, tyrosine, phenylalanine, glutamine, asparagin, proline, arginine, and glycine; in pigs lysine is found instead of arginine). In structure and effect vasopressin is similar to another hormone of the hypophysis—oxytocin.

G. N. KASSIL’

vasopressin

[‚vā·zō′pres·ən]
(biochemistry)
A peptide hormone which is elaborated by the posterior pituitary and which has a pressor effect; used medicinally as an antidiuretic. Also known as antidiuretic hormone (ADH).
References in periodicals archive ?
Terlipressin has a selective effect on vasoconstriction, and thus is one of the recommended therapeutics in type I HRS.3 Arginine vasopressin receptor 1a (AVPR1A) antagonist can block the vasoconstrictor effect.4 It has been found that AVPR1A gene promoter -6951 locus' single nucleotide polymorphisms (SNPs) in primary hypertension patients are closely associated with vasoconstrictor effect.5
Bridges, "Central actions of arginine vasopressin and a V1a receptor antagonist on maternal aggression, maternal behavior, and grooming in lactating rats," Pharmacology Biochemistry and Behavior, vol.
Hyponatremia in marathon runners due to inappropriate arginine vasopressin secretion.
Ze Xie (Alisma orientate (Sam.) Juzep., rhizome) 8 Arginine vasopressin (AVP) is a cyclic nonapeptide synthesized by neurosecretory cells of the central nervous system (CNS).
Increased thirst and plasma arginine vasopressin levels during 2-deoxy-d-glucose-induced glucoprivation in humans.
Key Words: arginine vasopressin, one-lung ventilation, shunt, systemic oxygenation
10.The efficacy of arginine vasopressin receptor antagonists as adjunctive treatment for EAH-induced encephalopathy deserves study as they become available.
This is in part due to its physical and biological similarity to arginine vasopressin. (11,69,70) AVP is a hormone that controls fluid metabolism, pain, and memory.
Adjunctive short-term arginine vasopressin antagonism may be considered for the patient with established low [ejection fraction]," Dr.
Intracerebroverttricular and septal injections of arginine vasopressin are not antipyretic in the rabbit, Peptides, 4, 195 198.
Their study last September examined the levels of serotonin, a neurotransmitter that contributes to mood, and arginine vasopressin receptor la, a hormone associated with social communication and bonding.
Consistent with their circadian timekeeping function, these cells rhythmically release certain brain chemicals (i.e., neuropeptides), such as brain-derived neurotrophic factor (BDNF) and arginine vasopressin (AVP).

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