Abstract
The possible protective effects of pentagastrin on indomethacin-induced small intestinal ulceration were investigated in rats. Ulcers were induced by subcutaneous injection of 30 mg/kg indomethacin, 30 min after refeeding rats fasted for 24 h. Administration of pentagastrin at a dose of 250 or 400 micrograms/kg i.p., 3 h prior to refeeding, reduced total ulcer area from 27.6 +/- 6.5 to 7.2 +/- 1.97 mm2 (mean +/- SEM; p less than 0.02) in the proximal small intestine only. Cyclic adenosine monophasphate, but not prostaglandin E2 levels were significantly raised by 250 micrograms/kg pentagastrin (0.15 +/- 0.05 vs. 0.38 +/- 0.07 pmol/mg protein; mean +/- SEM; p less than 0.02) in the same intestinal segment.
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