The catecholamines are a series of structurally similar amines (e.g., DOPAMINE, epinephrine, NOREPINEPHRINE that function as hormones, as NEUROTRANSMITTERS, or both. Catecholamines are produced by the enzymatic conversion of tyrosine, sharing the...

Catecholamines are chemical compounds derived from the amino acid tyrosine containing catechol and amine groups. Some of them are biogenic amines. Catecholamines are water-soluble and are 50% bound to plasma proteins, so they circulate in the...

SUMMARY Catecholamine-resistant shock is not uncommon in intensive care. Bolus dose terlipressin (a vasopressin analogue) has been used successfully in this setting allowing cessation of other vasopressor agents. The relative vasopressin deficiency in combination with the restoration of the vascular tone (by blocking...

5 Nonstandard abbreviations: AADC, aromatic-L-amino acid decarboxylase; APUD, amine precursor uptake and decarboxylation; MEN, multiple endocrine neoplasia; TH, tyrosine hydroxylase; DBH, dopamine-beta-hydroxylase; PNMT, phenylethanolamine-N-methyltransferase; 5-HIAA, 5-hydroxyindoleacetic acid; URL, upper reference limit; PBS, phosphate-buffered saline; and BSA, bovine serum albumin. Background: Serotonin is the...

The most infamous feud in American folklore, the long-running battle between the Hatfields and McCoys, may be partly explained by a rare, inherited disease that can lead to hair-trigger rage and violent outbursts.Dozens of McCoy descendants apparently have the disease, which causes high blood pressure,...