CAERULEIN

Absorption

Absorbed following intravenous administration.

Originator

Ceosunin,Kyowa Hakko,Japan,1976

The Uses of CAERULEIN

Caerulein is a ten amino acid oligopeptide that stimulates smooth muscle and increases digestive secretions. It is similar in action and composition to cholecystokinin. It stimulates gastric, biliary, and pancreatic secretion; and certain smooth muscle. It is used in paralytic ileus and as diagnostic aid in pancreatic malfunction. It is used to induce pancreatitis in experimental animal models.

The Uses of CAERULEIN

Stimulant (gastric secretory).

Indications

Caerulein is used in the treatment of paralytic ileus and as diagnostic aid in pancreatic malfunction.

Background

Caerulein is a specific decapeptide similar in action and composition to the natural gastrointestinal peptide hormone cholecystokinin. It exerts stimulatory effects on the gastric, biliary, and pancreatic secretion, as well as on certain smooth muscles.

Definition

ChEBI: A decapeptide comprising 5-oxoprolyl, glutamyl, aspartyl, O-sulfotyrosyl, threonyl, glycyl, tryptopyl, methionyl, aspartyl and phenylalaninamide residues in sequence. Found in the skins of certain Australian amphibians, it is an analogue of the gastrointes inal peptide hormone cholecystokinin and stimulates gastric, biliary, and pancreatic secretion. It is used in cases of paralysis of the intestine (paralytic ileus) and as a diagnostic aid in pancreatic malfunction.

Manufacturing Process

The tetrapeptide, L-pyroglutamyl-L-glutaminyl-L-aspartyl-L-tyrosine-azide (I), is condensed with the hexapeptide, L-threonyl-glycyl-L-tryptophanyl-L-methionyl-L-aspartyl-L-phenylalaninamide (II), having the hydroxyl of the threonyl radical blocked by an acyl radical in a suitable solvent, such as dimethylformamide, to obtain the decapeptide, L-pyroglutamyl-L-glutaminyl-L-aspartyl-L-tyrosyl-L-threonylglycyl-L-tryptophanyl-L-methionyl-L-aspartyl-Lphenylaninamide (III) having the hydroxy group of the threonyl radical blocked by an acyl radical. The decapeptide (III) is treated, at low temperature, with the complex anhydrous pyridine sulfuric anhydride finally to obtain the decapeptide, L-pyroglutamyl-L-glutaminyl-L-aspartyl-L-tyrosyl-L-threonyl-glycyl-L-tryptophanyl-L-methionyl-L-aspartyl-L-phenylalaninamide (IV) having the phenolic group of the tyrosyl radical protected by a sulfate radical and the hydroxyl of the threonyl radical protected by an acyl radical.
Finally, by mild alkaline hydrolysis of the decapeptide (IV) one obtains the decapeptide product.

Therapeutic Function

Stimulant (gastric secretory)

Hazard

A poison.

Pharmacokinetics

Caerulein is a specific decapeptide similar in action and composition to the natural gastrointestinal peptide hormone cholecystokinin that stimulates gastric, biliary, and pancreatic secretion. It also exerts stimulatory actions on certain smooth muscles.

Safety Profile

A poison by subcutaneous route. When heated to decomposition it emits toxic vapors of NOx and SOx

Metabolism

Not Available

Storage

Store at -20°C