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Effects of pantoprazole on ulcer healing delay associated with NSAID treatment

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Abstract

Nonsteroidal anti-inflammatory drugs delay gastric ulcer healing, and the ability of proton pump inhibitors to counteract this detrimental effect is debated. This study evaluates the effects of pantoprazole on experimental gastric ulcer healing in the presence of indomethacin. Rats with acetic-acid-induced gastric ulcers were orally treated for 3 or 7 days with pantoprazole (15 μmol/kg/day) or famotidine (20 μmol/kg/day), alone or in combination with indomethacin (3 μmol/kg/day). Ulcerated tissues were processed to assess ulcer area, malondialdehyde, proliferating cell nuclear antigen (PCNA) and cleaved caspase-3. Experiments on pylorus-ligated rats indicated that pantoprazole and famotidine were employed at equivalent inhibitory doses on gastric acid secretion (−67.9% and −64.5%, respectively). Indomethacin delayed ulcer healing both at days 3 and 7 (+22 and +35 mm2 vs control ulcer, respectively). At day 3, pantoprazole was more effective than famotidine in promoting ulcer healing in indomethacin-treated animals (−53.6 and −31.6 mm2 vs indomethacin, respectively). Malondialdehyde levels and caspase-3 activation in ulcers were increased by indomethacin (+79% and +3.7 folds vs control ulcer, respectively), and these effects were counteracted by pantoprazole (−77.9% and −3.5 folds vs indomethacin, respectively), but not famotidine. Increments of ulcer PCNA expression (+2.5 folds vs normal) were enhanced further by pantoprazole or famotidine, alone or in combination with indomethacin (+8.6 and +10.3 folds vs normal, respectively). Similar results were obtained after 7-day treatments of ulcerated animals with test drugs. It is concluded that, along with acid suppression, pantoprazole exerts acid-independent effects on ulcer healing, which can be ascribed to a decrease in tissue oxidation and apoptosis.

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Correspondence to Corrado Blandizzi.

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Fornai, M., Colucci, R., Antonioli, L. et al. Effects of pantoprazole on ulcer healing delay associated with NSAID treatment. Naunyn-Schmied Arch Pharmacol 379, 305–313 (2009). https://doi.org/10.1007/s00210-008-0355-y

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  • DOI: https://doi.org/10.1007/s00210-008-0355-y

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