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  • Title: Cytoprotective effect of rabeprazole against ethanol-induced gastric mucosal damage: possible involvement of nitric oxide.
    Author: Watanabe T, Higuchi K, Tominaga K, Fujiwara Y, Arakawa T.
    Journal: Drugs Exp Clin Res; 2000; 26(2):41-5. PubMed ID: 10894554.
    Abstract:
    The cytoprotective effect of rabeprazole, a new proton pump inhibitor, against ethanol-induced gastric mucosal damage was investigated in rats. Rats received intraperitoneal injections of rabeprazole once only or once daily for 3 days. Subsequently, the rats were given 1 ml of absolute ethanol by oral intubation. Some rats given rabeprazole were treated with N-omega-nitro-L-arginine methyl ester (L-NAME) or indomethacin. Repeated administration of rabeprazole significantly inhibited ethanol-induced gastric mucosal damage, although single administration of this drug did not. Pretreatment with L-NAME abolished the cytoprotective effect of rabeprazole. This inhibitory effect of L-NAME was reversed by L-arginine but not by D-arginine. Pretreatment with indomethacin did not influence the cytoprotective effect of rabeprazole. These results suggest that repeated intraperitoneal administration of rabeprazole has a cytoprotective effect against ethanol-induced gastric mucosal damage and that this effect may be mediated via nitric oxide but not via prostaglandins.
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