Wolfe MM, Short GM, McGuigan JE. Beta-adrenergic stimulation of gastrin release mediated by gastrin-releasing peptide in rat antral mucosa.
REGULATORY PEPTIDES 1987;
17:133-42. [PMID:
2884697 DOI:
10.1016/0167-0115(87)90022-x]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The present studies were directed to examine the effects of beta-adrenergic and cholinergic stimulation on gastrin release and to assess the potential role of gastrin-releasing peptide in exerting these effects, utilizing incubated rat antral mucosa. Rat antral mucosa was incubated at 37 degrees C in Krebs-Henseleit bicarbonate buffer, pH 7.4, continuously gassed with 95% O2-5% CO2. After 1 h media were sampled for radioimmunoassay measurement of gastrin content. Inclusion of carbachol (2.5 X 10(-6) M) in culture medium increased medium gastrin concentration by 106 +/- 28% (P less than 0.01); addition of specific antibodies to gastrin-releasing peptide to the culture medium did not affect carbachol-stimulated gastrin release. Inclusion of isoproterenol (10(-9) M) in culture medium did not affect somatostatin release into the medium, but increased medium gastrin by 234 +/- 24% (P less than 0.001). However, in contrast to carbachol, addition of antibodies to gastrin-releasing peptide to culture medium decreased isoproterenol-stimulated gastrin release by 67 +/- 9% (P less than 0.001). Results of these studies indicate that, under the conditions of these experiments, beta-adrenergic, but not muscarinic, stimulation of gastrin release may be mediated, at least in part, through gastrin-releasing peptide.
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