title: [Diminution of antifungal activity of fluconazole associated with ibuprofen and piroxicam in experimental histoplasmosis of hamsters (Mesocricetus auratus)]
abstract: The aim of this study was to determine if tha association of non-steroid antiinflammatory drugs (piroxicam and ibuprofen) with fluconazole, affects the antifungal activity of the azole compound, in an experimental model histoplasmosis in hamsters (Mesocricetus auratus). Sixty hamsters were intracardially inoculated with 4x10(6) yeasts of Histoplasma capsulatum var. capsulatum. Treatments began one week after the challenge and continued for three weeks. The hamsters were divided in six groups of ten animals each and received the following treatment: 1- fluconazole 8 mg/kg/day; 2- ibuprofen 20 mg/kg/day; 3- piroxicam 20 mg/kg/day; 4- fluconazole+ibuprofen; 5- fluconazole+piroxicam and 6- only received the solvent of these drugs. One week after ending the treatment, all the animals were sacrified and the evaluation of the treatments was based on the results of blood cultures, on the determination of colony forming units per gram of spleen, and the histopathologic studies of the same organ. The animals treated with fluconazole plus ibuprofen or piroxicam showed more colony colony forming units per gram (3.9x10(7) and 3.3x10(7)) when compared with the animals treated with fluconazole alone (0.9x10(7)). The histopathologic results of the hamsters that received fluconazole showed well-organized granulomas with few yeast-like elements inside the macrophages. In contrast, those which received fluconazole associated with antiinflammatory drugs presented lax granulomas containing numerous yeast-like elements. These findings let us to conclude that non-steroids antiinflammatory drugs diminish the antifungal efficacy of fluconazole in this animal model.
authors.affiliation: Centro de Micología, Departamento de Microbiología, Parasitología e Inmunología, Facultad de Medicina, Universidad de Buenos Aires, Paraguay 2155, 1121 Buenos Aires, Argentina. ctromic@janssen.com.ar
authors.forename: Jorge Luis
authors.initials: JL
authors.lastname: Finquelievich
authors.forename: Cristina
authors.initials: C
authors.lastname: Iovannitti
authors.forename: Fernanda
authors.initials: F
authors.lastname: Landaburu
authors.forename: Gabriel
authors.initials: G
authors.lastname: Raffin
authors.forename: Norberto
authors.initials: N
authors.lastname: SanJuan
authors.forename: Maria Rosa
authors.initials: MR
authors.lastname: Elías-Costa
authors.forename: Ricardo
authors.initials: R
authors.lastname: Negroni
vernacular_title: Disminución de la actividad antifúngica del fluconazol asociada a ibuprofeno y piroxicam en la histoplasmosis experimental del hámster (Mesocricetus auratus).