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Polyenantibiotica und Corticosteroide

Untersuchungen mit Hamycin

Polyene antibiotics and corticosteroids

Experiments with hamycin

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Summary

The susceptibility of microbial organisms to the action of polyene antibiotics depends upon the presence of sterols in the cell membranes. In vitro, sterols have been shown to protect against the fungicidal and fungistatic effects of various polyenes. This fact raised the question whether corticosteroids would impair the action of polyenes when both types of compounds are applied simultaneously in local therapy. In this paper, experiments are reported on the action of hamycin and hydrocortisone when acting together on Candida albicans and Saccharomyces cerevisiae. Antimycotic effects were determined by measuring oxygen consumption of the two stains of yeast (Warburg-technique). It could be demonstrated that the presence of hydrocortisone (30 mcg/ml) decreases significantly the antimycotic action of hamycin. These data which are different from previous observations with nystatin and pimaricin were discussed in respect to the differences in mode of action of various polyenes. The data collected in this study suggest to abstain from a simultaneous application of hamycin and hydrocortisone in topical dermatological therapy.

Zusammenfassung

Nur solche Mikroorganismen unterliegen der antibiotischen Wirkung von Polyenen, die in ihrer Zellwand Sterole enthalten. In vitro bedingen Sterole einen Schutz verschiedener Pilze vor den antimykotischen Effekten einiger Polyenantibiotica. Aus dieser Tatsache ergab sich die Frage, ob nicht der gleichzeitige Einsatz von Glucocorticoiden in dermatologischen Externa die Wirksamkeit von Polyenantibiotica abschwächt. Die vorliegenden Untersuchungen beschäftigen sich mit der Beeinflussung der antimykotischen Effekte von Hamycin, einem neueren Antibioticum aus der Heptaenreihe, durch Hydrocortison. Als Testorganismen dienten Candida albicans und Saccharomyces cerevisiae. Als Maß für antimykotische Wirkungen wurde die Verringerung des Sauerstoffverbrauches registriert (Warburg-Methode). Die Untersuchungen ergaben, daß die Anwesenheit von Hydrocortison (30 mcg/ml) zu einer deutlichen Abnahme der antimykotischen Wirkung von Hamycin führt. Dieser Befund, der im Gegensatz zu den Ergebnissen früherer Untersuchungen mit Nystatin und Pimaricin stehr, wird im Hinblick auf die Unterschiede in der Wirkungsweise verschiedener Antibiotica der Polyenreihe diskutiert. Die vorliegenden Ergebnisse sprechen gegen die Zweckmäßigkeit eines kombinierten Einsatzes von Hamycin und Hydrocortison in der dermatologischen Lokalbehandlung.

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Raab, W., Windisch, J. Polyenantibiotica und Corticosteroide. Arch. klin. exp. Derm. 238, 436–442 (1970). https://doi.org/10.1007/BF00525736

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  • DOI: https://doi.org/10.1007/BF00525736

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