| arginine vasopressin | [8-arginine]vasopressin; [Arg8]vasopressin;vasopressin containing an arginyl residue in position 8 (as in chickens and most mammals, including man); porcine vasopressin has a lysyl residue at position 8. All are vasopressors. Synonym: argipressin. (05 Mar 2000) |
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| vasopressin | <protein> A peptide hormone released from the posterior pituitary lobe but synthesised in the hypothalamus. There are 2 forms, differing only in the amino acid at position 8: arginine vasopressin is widespread, while lysine vasopressin is found in pigs. Has antidiuretic and vasopressor actions. Used in the treatment of diabetes insipidus. (18 Nov 1997) |
| vasopressin-converting aminopeptidase | <enzyme> Activity found in brain which converts vasopressin into centrally active metabolites Registry number: EC 3.4.11.- Synonym: vp-c aminopeptidase (26 Jun 1999) |
| vasopressin level | This test measures the amount of ADH in the serum. It is used to detect disorders that may affect the level of ADH in the serum. Normal values are: 0 to 4.7 pg/ml. Elevated ADH levels can indicate a CNS infection, fluid imbalance, CNS tumour, SIADH or acute porphyria. Low levels can indicate: diabetes insipidus or damage to the pituitary gland. (27 Sep 1997) |
| vasopressin-resistant diabetes | Diabetes insipidus due to inability of the kidney tubules to respond to antidiuretic hormone; X-linked inheritance, with full expression in males and partial defect in heterozygous females. Synonym: vasopressin-resistant diabetes. (05 Mar 2000) |
| receptors, vasopressin | Specific molecular sites or structures on or in cells that vasopressins react or to which they bind in order to modify the function of the cells. Two types of vasopressin receptor exist, the v1 receptor and the v2 receptor. The v1 receptor can be subdivided into v1a and v1b (formerly v3) receptors. (12 Dec 1998) |
| unit of vasopressin | The pressor activity of 0.5 mg of the USP Posterior-pituitary Reference Standard; 1 mg of synthetic vasopressin corresponds to 600 IU. (05 Mar 2000) |
| 8-lysine vasopressin | <chemical> 8-lysyl vasopressin. The porcine antidiuretic hormone most frequently used clinically. A cyclic nonapeptide with lysine in position 8 of the chain; it is used to treat diabetes insipidus and as haemostatic because of its vasoconstrictor action. Pharmacological action: haemostatics, renal agents, vasoconstrictor agents. Chemical name: Vasopressin, 8-L-lysine- (12 Dec 1998) |
| AMP | <abbreviation> Adenosine monophosphate; specifically, the 5'-monophosphate unless modified by a numerical prefix. See: adenylic acid. (05 Mar 2000) |
| AMP-activated protein kinase kinase | <enzyme> An endogenous kinase kinase; reactivates the inactive form of AMP-activated protein kinase (AMP-pk); phosphorylates the 63-kD subunit of AMP-pk Registry number: EC 2.7.1.- Synonym: AMP-pk reactivator, hmg CoA reductase kinase kinase (26 Jun 1999) |
| AMP deaminase | <enzyme> An enzyme that catalyses the deamination of AMP to imp. Chemical name: AMP aminohydrolase Registry number: EC 3.5.4.6 (12 Dec 1998) |
| receptors, cyclic AMP | Cell surface proteins that bind cyclic AMP with high affinity and trigger intracellular changes which influence the behaviour of cells. The best characterised cyclic AMP receptors are those of the slime mold dictyostelium discoideum. The transcription regulator cyclic AMP receptor protein of prokaryotes is not included nor are the eukaryotic cytoplasmic cyclic AMP receptor proteins which are the regulatory subunits of cyclic AMP-dependent protein kinases. (12 Dec 1998) |
| polyphosphate AMP phosphotransferase | <enzyme> From acinetobacter; catalyses (polyphosphate)n and AMP to (polyphosphate)n-1 and ADP Registry number: EC 2.7.4.- Synonym: pamp phosphotransferase (26 Jun 1999) |
| cyclic AMP | <molecular biology> 3'5' cyclic ester of AMP. The first second messenger hormone signalling system to be characterised. Generated from ATP by the action of adenyl cyclase that is coupled to hormone receptors by G-proteins (GTP-binding proteins). CAMP activates a specific (cAMP dependent) protein kinase and is inactivated by phosphodiesterase action giving 5'AMP. Also functions as an extracellular morphogen for some slime moulds. (18 Nov 1997) |
| cyclic AMP-dependent protein kinase | Enzymes which attach phosphate groups to the serine or tyrosine amino acids on proteins as a means of regulating the proteins' activity in metabolic reactions. (09 Oct 1997) |