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Desmopressin (1-deamino-8-D-arginine vasopressin) is a synthetic form of the normal human hormone arginine vasopressin (the antidiuretic hormone, or ADH), a peptide containing nine amino acids. Compared to vasopressin, desmopressin's first amino acid has been deaminated , and the arginine at the eighth position is in the dextro rather than the ...
Vasopressin analogues are synthetic peptides structurally and functionally similar to arginine vasopressin (AVP), a naturally occurring hormone in mammals. These compounds have been developed to target specific vasopressin receptors (V1, V2, and V3) with varying affinities, allowing for more tailored therapeutic applications.
Although both vasopressors, vasopressin and epinephrine differ in that vasopressin does not have direct effects on cardiac contractility as epinephrine does. [18] Thus, vasopressin is theorized to be of increased benefit over epinephrine in cardiac arrest due to its properties of not increasing myocardial and cerebral oxygen demands. [18]
The most common side effects during treatment with vasopressin are dizziness, angina, chest pain, abdominal cramps, heartburn, nausea, vomiting, trembling, fever, water intoxication, pounding sensation in the head, diarrhoea, sweating, paleness, and flatulence. The most severe adverse reactions are myocardial infarction and hypersensitivity. [53]
The "vaptan" drugs act by directly blocking the action of vasopressin at its receptors (V 1A, V 1B and V 2).These receptors have a variety of functions, with the V 1A and V 2 receptors are expressed peripherally and involved in the modulation of blood pressure and kidney function respectively, while the V 1A and V 1B receptors are expressed in the central nervous system.
V 2 receptor (V 2 R) differs from V 1 R primarily in the number of sites susceptible to N-linked glycosylation; the V 1 R has sites at both the amino-terminus and at the extracellular loop, whereas the V 2 R has a single site at the extracellular amino-terminus.
Vasopressin receptor antagonists that are selective for the V2 receptor include: . Tolvaptan (FDA-approved); Lixivaptan; Mozavaptan; Satavaptan; Their main uses are in hyponatremia, such as that caused by syndrome of inappropriate antidiuretic hormone (SIADH) and heart failure, however these agents should be avoided in patients with cirrhosis.
Desmopressin rapidly improves short-term memory and enhances memory imprinting. Desmopressin is sometimes used for the treatment of diabetes insipidus, a condition of frequent urination and extreme thirst. In some countries, Desmopressin is used for amnesia and to treat narcotic-related mental problems.