Calcitonin gene-related peptides I and II and calcitonin: Distinct effects on gastric acid secretion in humans
1988
Abstract The human calcitonin gene-related peptides I and II (CGRP I and CGRP II) are two neuropeptides that have been recognized throughout the gastrointestinal system including the stomach. The present study was undertaken to compare in healthy volunteers the effects of intravenous infusions of CGRP I and CGRP II (79 pmol/kg · h) on pentagastrinstimulated acid secretion to those of calcitonin (88 pmol/kg · h). Calcitonin gene-related peptide I did not inhibit basal or pentagastrin-stimulated acid secretion. However, CGRP II and calcitonin inhibited pentagastrin-stimulated acid responses by 20% and 28%, respectively (p
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