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Original Article

On the mechanism of action of griseofulvin in dermatophytosis

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Pages 274-278 | Published online: 09 Jul 2009
 

Abstract

Guinea pig hair absorbed or adsorbed with griseofulvin was less efficiently hydrolyzed by the extracellular and cell-bound keratinases of Trichophyton mentagrophytes than untreated control hair. The same observations were made using hair from guinea pigs treated orally with griseofulvin. This antibiotic and 3 related compounds had no effect on the active sites of the keratinases. The results of these studies support the hypothesis that resistance to dermatophytic attack is the result of griseofulvin incorporation into keratinous structures causing substrate modification.

Resume

Des poils de cobaye ayant fixé par adsorption ou absorption de la griséofulvine sont moins facilement hydrolysés par les kératinases exocellulaires ou cellulaires de Trichophyton mentagrophytes, que les poils témoins. Les mêmes observations sont faites avec des poils de cobayes d'un animal préalablement traité par de la griséofulvine orale. Cet antibiotique ainsi que trois composés voisins n'ont pas d'effet sur les sites actifs des kératinases. Ces résultats corroborent l'hypothèse, selon laquelle la résistance à l'attaque des dermatophytes serait liée aux modifications de structure de la kératine induites par la griséofulvine.

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