Secretory and vascular effects of adrenomedullin in gastric ulcer: role of CGRP- and adrenomedullin-receptors.

Abstract Adrenomedullin prevents damage of gastric mucosa in either reserpine-treated or pylorus-ligated rats. Pre-treatment with CGRP 8–37 resulted in a decrease of the gastro-protective effect of adrenomedullin in both models and reversed the inhibitory effect of adrenomedullin on gastric acid output in the pylorus-ligated rats. These adrenomedullin actions were less effectively modified by pre-treatment with adrenomedullin 22–52 . These data suggest that the anti-ulcer effect of adrenomedullin is mainly related to its anti-secretory action, presumably mediated through CGRP-receptors.