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. 1996 Apr;38(4):518–524. doi: 10.1136/gut.38.4.518

Effect of allopurinol, sulphasalazine, and vitamin C on aspirin induced gastroduodenal injury in human volunteers.

M E McAlindon 1, A F Muller 1, B Filipowicz 1, C J Hawkey 1
PMCID: PMC1383107  PMID: 8707080

Abstract

BACKGROUND--The mechanisms of aspirin induced gastroduodenal injury are not fully understood. Aspirin induces the release of reactive oxygen metabolites in animal models, which may contribute to mucosal injury. AIMS--To investigate the effects of aspirin administered with placebo or antioxidants on gastric mucosal reactive oxygen metabolite release and gastroduodenal injury in human volunteers. SUBJECTS--Fourteen healthy volunteers participated in the study (seven male; mean age 27 years, range 20-40). METHODS--In a double blind, randomised, crossover study, volunteers received aspirin 900 mg twice daily and either placebo, allopurinol 100 mg twice daily, sulphasalazine 1 g twice daily or vitamin C 1 g twice daily for three days. Injury was assessed endoscopically and by quantifying mucosal reactive oxygen metabolite release by measuring chemiluminescence before and after each treatment. The effect on prostanoids was determined by measuring ex vivo antral prostaglandin E2 (PGE2) synthesis and serum thromboxane B2 (TXB2). RESULTS--No drug reduced any parameter of gastric injury but vitamin C reduced duodenal injury assessed by Lanza score (p < 0.005). Chemiluminescence increased after aspirin both with placebo (p < 0.05) and vitamin C (p < 0.05). Post-treatment chemiluminescence was lower in subjects taking allopurinol (p < 0.05) or sulphasalazine (p < 0.005) than in those taking placebo with aspirin. CONCLUSIONS--In this study, aspirin induced gastric injury was associated with reactive oxygen metabolite release. This was reduced by sulphasalazine and allopurinol, although macroscopic injury was not affected. Vitamin C, however, was shown to have a previously unrecognised protective effect against aspirin induced duodenal injury.

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Selected References

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