Effect of platelet-activating factor on gastrin release from cultured rabbit G-cells

Beales, ILP (2001) Effect of platelet-activating factor on gastrin release from cultured rabbit G-cells. Digestive Diseases and Sciences, 46 (2). pp. 301-306. ISSN 1573-2568

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Abstract

Gastric infection with Helicobacter pylori is associated with hypergastrinemia. Platelet activating factor (PAF) is produced in H. pylori-infected mucosa. The effects of PAF on gastrin release from cultured antral rabbit G cells were examined. Rabbit antral G-cells were obtained by collagenase-EDTA digestion and enriched by centrifugal elutriation. After 40 hr in culture, gastrin release in response to PAF was assessed. PAF stimulated gastrin release in a dose-dependent manner. A maximal release of 67% above basal was seen with PAF at 100 nM. PAF also enhanced the gastrin release stimulated by forskolin and bombesin. PAF-stimulated gastrin release was abolished by a PAF-receptor antagonist. Gastrin release stimulated by PAF was abolished by chelation of intra- or extracellular calcium or the L-type calcium channel inhibitor verapamil as well as by the protein kinase C inhibitor chelerythrine. Platelet-activating factor may contribute to the hypergastrinemia of H. pylori infection by stimulating gastrin release from G cells. PAF-stimulated gastrin release involves influx of extracellular calcium via L-type channels and activation of protein kinase C.

Item Type: Article
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
Related URLs:
Depositing User: EPrints Services
Date Deposited: 25 Nov 2010 11:09
Last Modified: 15 Dec 2022 01:47
URI: https://ueaeprints.uea.ac.uk/id/eprint/12194
DOI: 10.1023/A:1005553722093

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