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Browsing by Subject "C. albicans"

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    Deletion of GLX3 in Candida albicans affects temperature tolerance, biofilm formation, and virulence
    (Oxford University Press, 2018-11-21) Cabello, Laura; Gómez Herreros, Estefanía; Fernández Pereira, Jordan; Maicas, Sergi; Groot, Piet W. J. de; Valentín, Eulogio; Martínez-Esparza Alvargonzález, María Concepción; Bioquímica y Biología Molecular B e Inmunología
    Candida albicans is a predominant cause of fungal infections in mucosal tissues as well as life-threatening bloodstream infections in immunocompromised patients. Within the human body, C. albicans is mostly embedded in biofilms, which provides increased resistance to antifungal drugs. The glyoxalase Glx3 is an abundant proteomic component of the biofilm extracellular matrix. Here, we document phenotypic studies of a glx3 null mutant concerning its role in biofilm formation, filamentation, antifungal drug resistance, cell wall integrity and virulence. First, consistent with its function as glyoxalase, the glx3 null mutant showed impaired growth on media containing glycerol as the carbon source and in the presence of low concentrations of hydrogen peroxide. Importantly, the glx3 mutant showed decreased fitness at 37◦C and formed less biofilm as compared to wild type and a reintegrant strain. At the permissive temperature of 28◦C, the glx3 mutant showed impaired filamentation as well as increased sensitivity to Calcofluor white, Congo red, sodium dodecyl sulfate and zymolyase, indicating subtle alterations in wall architecture even though gross quantitative compositional changes were not detected. Interestingly, and consistent with its impaired filamentation, biofilm formation and growth at 37◦C, the glx3 mutant is avirulent. Our results underline the role of Glx3 in fungal pathogenesis and the involvement of the fungal wall in this process.
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    Endocarditis por Candida sp. Experiencia en un hospital terciario y revisión de la literatura
    (Sociedad Española de Quimioterapia, 2013) Hernández-Torres, Alicia; García-Vázquez, Elisa; Laso-Ortiz, Alicia; Herrero- Martínez, José Antonio; Gómez-Gómez, Joaquín; Medicina
    RESUMEN: A pesar de la relativa alta frecuencia de candidemia, la endocarditis por Candida sp es una entidad rara. Describimos cinco casos de endocarditis por Candida ingresados en nuestro hospital en el período comprendido entre los años 2005-2011. Dos de los casos estaban causados por Candida albicans, dos por Candida parapsilosis, y en otro de ellos no se identificó la especie de Candida. Todos ellos, salvo uno, presentaban claros factores de riesgo de candidemia. El tratamiento consistió en anfotericina B con/sin flucitosina en cuatro de los pacientes, y en todos ellos se realizó cirugía de sustitución valvular y/o extracción de los dispositivos intravasculares. La mortalidad global fue del 60%, y en un 40% fue directamente relacionada con la endocarditis. A todos los pacientes que sobrevivieron se les administró tratamiento supresor con fluconazol durante un mínimo de dos años, tras cuya suspensión hubo un caso de recidiva.

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