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Original Article

Estudio Citoquimico De Las Principales Enzimas Hidroliticas Del Paracoccidioides brasiliensis

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Pages 139-143 | Published online: 09 Jul 2009
 

Summary

The hydrolytic capacity, possible lysosomic reaction and the role of proteolytic enzymes of Paracoccidioides brasiliensis were studied. Alkaline and acid phosphotase and L-leucyl aminopeptidase were investigated in vivo and in vitro.

Alkaline phosphotase and aminopeptidase activity was detected in the yeast phase both in vivo and in vitro but acid phosphotase was absent. In the mycelial phase there was less alkaline phosphotase activity, relatively more aminopeptidase and no acid phosphotase activity.

The effect of sulphamethoxipiridazine, Amphotericin B and pH on these enzymes was investigated. The pathogenicity of P. brasiliensis appears to be related to the activity of aminopeptidase.

Abstract

En el presente trabajo se estudian la capacidad hidrolitica, la posible reacción lisosomial y el papel de las enzimas proteoliticas del Paracoccidiodes brasiliensis. Las fosfatasas alcalina y ácida y la L-leucyl aminopeptidasa fueron investigadas in vivo e in vitro.

La actividad de la fosfatasa alcalina y de la aminopeptidasa fué observada en la forma levaduriforme tanto in vivo como in vitro; no encontramos reacción para la fosfatasa ácida. En la forma micelial la actividad para la fosfatasa alcalina fué menor, algo más marcada para la aminopeptidasa y negativa para la fosfatasa ácida.

La acción de la sulfametoxipiridazina, Amfotericin B. y el pH de estas enzimas fueron investigadas. La patogenicidad del P. brasiliensis parece estar relacionada con la actividad de la aminopeptidasa.

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