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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 8 (1994), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background: Treatment of omeprazole induces profound inhibition of gastric acid secretion, resulting in hypergastrinaemia. In rats hypergastrinaemia induced by chronic administration of high doses of omeprazole resulted in ECL-cell hyperplasia and subsequent carcinoid formation. This finding may limit long-term therapy in man. The synthetic prostaglandin E2 analogue enprostil not only inhibits gastric acid secretion but also reduces serum gastrin in normal subjects and in peptic ulcer patients. The present study was undertaken to determine whether enprostil reduces serum gastrin in patients on long-term treatment with omeprazole. Methods: Eight patients with reflux oesophagitis treated with 40 mg omeprazole once daily for at least 3 months received 3 5 μg enprostil t.d.s. during a 5-day treatment course. Basal and postprandial serum gastrin concentrations and pepsinogen A and C levels were measured on the day before, the first and the final day, and on the day after cessation of treatment. Results: Enprostil significantly (P 〈 0.05) reduced basal serum gastrin from 65±15 pmol/L to 51 ± 13 pmol/L on the first treatment day, and to 41 ± 9 pmol/L on the final day. Enprostil also significantly (P 〈 0.05) reduced postprandial integrated serum gastrin from 6173 ± 849 pmol.h/L to 4516 ± 906 pmol.h/L and to 3532 ± 706 pmol.h/L on the first and final treatment days, respectively. On the day after cessation of treatment basal (57± 11 pmol/L) and postprandial integrated serum gastrin concentrations (5766 ± 864 pmol.h/L) were not significantly different when compared to pretreatment values. Enprostil had no significant influence on serum pepsinogens A and C. Conclusion: Short-term co-administration of enprostil lowers the serum gastrin levels in patients on long-term treatment with omeprazole.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-2568
    Keywords: prostaglandin E2 analog ; enprostil ; omeprazole ; gastrin ; pepsinogen A ; pepsinogen C
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study was undertaken to determine whether the synthetic prostaglandin E2 analog enprostil is able to inhibit basal and postprandial hypergastrinemia induced by omeprazole. We also studied the effect of omeprazole, enprostil, and the combination of both drugs on serum pepsinogen A and C levels. Eight normal subjects received in random order five-day courses of 40 mg omeprazole once a day, 35 µg enprostil three times a day, the combination of both drugs, and placebo. Omeprazole induced significant increases in basal and postprandial serum gastrin and in pepsinogen A and C levels. These increments persisted on the day after stopping treatment. Coadministration of enprostil inhibited omeprazole-induced basal hypergastrinemia and postprandial integrated serum gastrin, but not basal serum pepsinogen A and C, while the inhibition on the day after the treatment courses only reached statistical significance for the postprandial integrated serum gastrin concentration. It is concluded that enprostil inhibits omeprazole-induced basal and postprandial hypergastrinemia, with a tendency to protracted inhibition after stopping the drugs, and that enprostil does not significantly influence omeprazole-induced increases in pepsinogen A and C level. Coadministration of enprostil may be helpful in preventing pronounced hypergastrinemia in the few patients who show large serum gastrin increases during treatment with omeprazole.
    Type of Medium: Electronic Resource
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