Document Report Card

ID: ALA1122950

Journal: J Med Chem

Title: Structure-activity relationships of C-terminal tri- and tetrapeptide fragments that inhibit gastrin activity.

Authors: Martinez J, Bali JP, Magous R, Laur J, Lignon MF, Briet C, Nisato D, Castro B.

Abstract: A series of tri- and tetrapeptide derivatives, analogues of the gastrin C-terminal region with no phenylalanine residue, were synthesized. These peptides were tested for their ability to inhibit gastrin-stimulated acid secretion in vivo as well as binding of [125I]-(Nle11)-HG-13 to gastric mucosal cell receptors in vitro. Most of the peptides tested exhibited gastrin antagonist activity in vivo and in vitro. Most active derivatives were 20-30 times more potent than the well-known gastrin antagonist derivatives proglumide and benzotript and had 20-200 times more binding affinity. The smallest fragment exhibiting antagonist activity was the tripeptide Boc-L-tryptophyl-L-methionyl-L-aspartic acid amide.

CiteXplore: 3973899

DOI: 10.1021/jm00381a002