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Distention ulcer as a model for testing of drugs for ulcerogenic side effects

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Abstract

A modification of the distention ulcer was studied in albino rats and a new possibility of testing ulcerogenic side effects of drugs was described. The distention alone was not sufficient to produce lesions. The severity of ulcer lesions was highly dependent on the volume of the acid solution. Large volumes of 0.1 N HCl evoked severe ulcers within 1 h. Small amounts of weak acid solution did not cause any ulceration. Anti-inflammatory drugs administered in therapeutic doses, which did not yet produce any ulcers in animals, increased the sensitivity of the gastric mucosa against the aggresive factor, the acid. In animals pretreated by anti-inflammatory drugs in toxic doses an earlier development of ulceration was observed by distention with acid. Stress also accelerated and aggravated the formation of distention ulcers.

Zusammenfassung

Das sog. „distention“-Ulkus wurde an Albinoratten untersucht und als neue Möglichkeit für die Feststellung ulzerogener Nebenwirkungen von Substanzen beschrieben. Die Dehnung des Magens in sich war nicht ausreichend um ulzerogene Läsionen auszulösen, denn die Dehnung des Magens mit physiologischer Kochsalzlösung führte nicht zur Ulzeration. Die Säure ist ein entscheidender Faktor in der Bildung des „distention“-Ulkus. Große Volumina von 0,1 N Salzsäure riefen innerhalb von 1 Std massive Ulzeration hervor. Kleine Mengen von dieser Säurelösung verursachten keine Ulzeration im Magen. Entzündungshemmer, die in noch von ulzerogenen Nebenwirkungen freien therapeutischen Dosen verabreicht wurden, erhöhten die Empfindlichkeit der gastralen Mukosa dem aggressiven Faktor, der Säure, gegenüber. Bei den mit bekanntlich ulzerogen wirkenden Dosen von Entzündungshemmern vorbehandelten Ratten wurde eine schnellere Bildung von Ulzera durch die Dehnung des Magens mit Säure beobachtet. Auch die Stressvorbehandlung beschleunigte und verstärkte die Bildung der durch Dehnung hervorgerufenen ulzerogenen Veränderungen im Magen.

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Some of the results have been communicated at the International Workshop on Pharmacological Methods in Precinical Safety-Evaluation of New Drugs, October 10–13, 1977, Zurich

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Szelenyi, I., Thiemer, K. Distention ulcer as a model for testing of drugs for ulcerogenic side effects. Arch. Toxicol. 41, 99–105 (1978). https://doi.org/10.1007/BF00351774

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  • DOI: https://doi.org/10.1007/BF00351774

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