Comparative effects of GLP-1-(7-36) amide, oxyntomodulin and glucagon on rabbit gastric parietal cell function

Eur J Pharmacol. 1995 Feb 15;288(3):319-27. doi: 10.1016/0922-4106(95)90044-6.


We have investigated in vitro, the effects of glucagon-like peptide-1-(7-36) amide (GLP-1-(7-36) amide), oxyntomodulin and glucagon on two rabbit parietal cell-enriched fractions (F3, F3n), with parietal cell contents of 60% and 88%, respectively. Histamine (10(-5) M) stimulated [14C]aminopyrine accumulation to an amount of 850% in excess of the basal level, whereas GLP-1-(7-36) amide (10(-7) M) and oxyntomodulin (10(-6) M) induced increases of 50% and 30%, respectively. With a histamine concentration of 10(-6) M, [14C]aminopyrine accumulation was stimulated to 498% in excess of the basal level; GLP-1-(7-36) amide (10(-7) M) and oxyntomodulin (10(-7) M) induced increases of 18% and 15%, respectively. With these parameters, oxyntomodulin[19-37] and glucagon were without effect. Specific binding of [125I]GLP-1-(7-36) amide to parietal cell plasma membranes was inhibited dose-dependently by GLP-1-(7-36) amide, oxyntomodulin and glucagon with inhibitory concentrations of 0.25 nM, 65 nM and 800 nM, respectively. No specific binding of [125I]oxyntomodulin or [125I]glucagon was detectable. GLP-1-(7-36) amide receptor mRNA was only detected in parietal cell-enriched fractions. GLP-1-(7-36) amide, oxyntomodulin and glucagon stimulated parietal cell cAMP production to similar maximal levels with median values close to 0.28 nM, 10.5 nM and 331.7 nM, whereas oxyntomodulin[19-37] had no effect. The maximal cAMP production induced by GLP-1-(7-36) amide, oxyntomodulin or glucagon was additive to that induced by histamine.(ABSTRACT TRUNCATED AT 250 WORDS)

Publication types

  • Comparative Study

MeSH terms

  • Aminopyrine / metabolism
  • Animals
  • Blotting, Northern
  • Cyclic AMP / biosynthesis
  • Glucagon / pharmacology*
  • Glucagon-Like Peptide 1
  • Glucagon-Like Peptides / pharmacology*
  • Histamine / pharmacology
  • Oxyntomodulin
  • Parietal Cells, Gastric / drug effects*
  • Parietal Cells, Gastric / metabolism
  • Peptide Fragments / pharmacology*
  • RNA, Messenger / genetics
  • Rabbits
  • Somatostatin / pharmacology


  • Oxyntomodulin
  • Peptide Fragments
  • RNA, Messenger
  • Aminopyrine
  • glucagon-like peptide 1 (7-36)amide
  • Somatostatin
  • Glucagon-Like Peptides
  • Histamine
  • Glucagon-Like Peptide 1
  • Glucagon
  • Cyclic AMP