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Gastric cytoprotection in man by prostaglandin E2
Scandinavian Journal of Gastroenterology
|January 1, 1981
Summary
Prostaglandin E2 (PGE2) protects the stomach lining by increasing mucus and bicarbonate secretion. This study shows PGE2 enhances gastric mucus production and prevents ethanol-induced cell damage in healthy volunteers.
Area of Science:
- Gastroenterology
- Pharmacology
Background:
- The gastric mucosa is protected by mucus and bicarbonate secretion.
- Prostaglandins play a role in maintaining mucosal integrity.
- Ethanol can damage the gastric lining.
Purpose of the Study:
- To investigate the effects of topical prostaglandins E2 (PGE2) on gastric mucosal function in healthy volunteers.
- To determine if PGE2 confers cytoprotection against ethanol-induced gastric injury.
Main Methods:
- Administration of topical PGE2 (1 mg) to healthy volunteers.
- Measurement of transmucosal potential difference (PD), mucus secretion, and epithelial cell turnover.
- Assessment of ethanol (40%) challenge with and without PGE2 pretreatment.
Main Results:
- PGE2 increased gastric PD by 10 mV and stimulated gastric mucus secretion by 50%.
- Ethanol reduced PD by 25 mV and increased epithelial cell shedding by 350%.
- PGE2 pretreatment prevented ethanol-induced epithelial cell exfoliation, demonstrating cytoprotection.
Conclusions:
- Topical PGE2 stimulates gastric mucus and potentially bicarbonate production in humans.
- PGE2-mediated gastric cytoprotection may involve enhanced mucus and/or bicarbonate secretion.