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Expresión de melanina en Paracoccidioides brasiliensis : inducción química con L-DOPA y L-epinefrina

Authors: Urán Jiménez, Martha Eugenia; Castañeda A., Lina Marcela; Restrepo Moreno, Ángela; Cano Restrepo, Luz Elena;

Expresión de melanina en Paracoccidioides brasiliensis : inducción química con L-DOPA y L-epinefrina

Abstract

RESUMEN : Introducción. Paracoccidioides brasiliensis es el agente etiológico de la paracoccidioidomicosis (PCM), una de las micosis más importantes en Latinoamérica, es un hongo dimórfico que crece a 36°C (levadura-forma parasítica) y a temperatura ambiente 18ºC (moho-forma saprofítica). Objetivo. Determinar la expresión in vitro de melanina por P. brasiliensis mediante el uso de factores químicos como L-DOPA y L-epinefrina. Materiales y métodos. Cepa ATCC 60855 de P. brasiliensis crecida en medio sintético ajustado individualmente a pH 5,5 y suplementado con L-dihidroxifenilalanina (L-DOPA) 1mM o L-epinefrina 0,8 mg/ml. Resultados. Se observó que la inducción química con 1mM de L-DOPA o con 0,8 mg/ml de L-epinefrina resultaba en la melanización de las levaduras de P. brasiliensis. Conclusiones. Se vio que P. brasiliensis tiene la capacidad de crecer in vitro en medio ácido a pH 5,5 y sintetizar melanina a partir de inductores químicos externos como L-DOPA y L-epinefrina.

ABSTRACT : Introduction. Paracoccidioides brasiliensis is the etiological agent of paracoccidioidomycosis (PCM), one of the most important mycoses in Latin America, it is a thermo dimorphic fungi that growth at 36°C (yeast-parasitic form) and 18ºC (mycelia- saprophytic form). Objective. To determine in vitro the expression of melanin by P. brasiliensis using L-DOPA and L-epinephrine chemical factors. Materials and methods. ATCC 60855 P. brasiliensis strain growth in pH 5,5 synthetic media supplemented with L-dihidroxifenilalanina or L-epinephrine. Results. Was observed that chemical induction with L-DOPA 1mM or L-epinephrine 0,8 mg/ml generated melanization of the P. brasiliensis yeast. Conclusions. P. brasiliensis yeast could growth in vitro in acid media (pH 5,5) and synthesizes melanin using external chemical induction as L-DOPA or L-epinephrine.

COL0013709

Country
Colombia
Keywords

Levodopa, Melanina, Epinephrine, Virulence Factors, Melanin, 610, Epinefrina, Paracoccidioidomicosis, Paracoccidioides, Factores de Virulencia, Paracoccidioidomycosis

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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