
handle: 10495/27731
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
Levodopa, Melanina, Epinephrine, Virulence Factors, Melanin, 610, Epinefrina, Paracoccidioidomicosis, Paracoccidioides, Factores de Virulencia, Paracoccidioidomycosis
Levodopa, Melanina, Epinephrine, Virulence Factors, Melanin, 610, Epinefrina, Paracoccidioidomicosis, Paracoccidioides, Factores de Virulencia, Paracoccidioidomycosis
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