Role of prostaglandin E2 on gastric ulcers induced by non-steroidal anti-inflammatory compounds (NOSAC)

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Abstract
We investigated the effect of indomethacin and aspirin on the prostaglandin E2 (PGE2) levels in rat gastric mucosa. In untreated controls, the PGE2 level was 1085 ± 80 ng/g in the fundic- and 2435 ± 339 ng/g in the antral mucosa; it was markedly reduced by indomethacin (6 or 20mg/kg) in a dose-related manner prior to the formation of gastric ulcers. Aspirin (200mg/kg) also decreased the mucosal PGE2 content. The simultaneous infusion of 5Μg/kg 16, 16-dimethyl PGE2 and 20 mg/kg indomethacin inhibited the formation of gastric ulcers. Our experimental results suggested that the indomethacin- or aspirin-induced gastric mucosal lesions are due to a deficiency of endogenous mucosal PGE2.