Pentagastrin

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Pentagastrin
Systematic (IUPAC) name
4-(1-carbamoyl-2-phenyl-ethyl)amino-3-[2-[3-(1H-indol-3-yl)-2- [3-(2-methylpropoxycarbonylamino)propanoylamino]propanoyl]amino- 4-methylsulfanyl-butanoyl]amino-4-oxo-butanoic acid
Identifiers
CAS number 5534-95-2
ATC code V04CG04
PubChem 444007
DrugBank APRD01172
Chemical data
Formula C37H49N7O9S 
Mol. mass 767.893 g/mol
Pharmacokinetic data
Bioavailability  ?
Metabolism  ?
Half life 10 minutes or less
Excretion  ?
Therapeutic considerations
Pregnancy cat.

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Legal status
Routes  ?

Pentagastrin is a synthetic polypeptide that has effects like gastrin when given parenterally. It stimulates the secretion of gastric acid, pepsin, and intrinsic factor, and has been used as a diagnostic aid as the pentagastrin-stimulated calcitonin test.

Pentagastrin binds to the cholecystokinin-B receptor, which is expressed widely in the brain. Activation of these receptors activates the phospholipase C second messenger system. When given intravenously it causes panic attacks.

Pentagstrin's IUPAC chemical name is "L-Phenylalaninamide, N-((1,1-dimethylethoxy)carbonyl)-beta-alanyl-L-tryptophyl-L-methionyl-L-alpha-aspartyl".