Results: 182

Commercial drugs containing flavonoids are active in mice with malaria and in vitro against chloroquine-resistant Plasmodium falciparum

Mem. Inst. Oswaldo Cruz; 113 (12), 2018
BACKGROUND The main strategy to control human malaria still relies on specific drug treatment, limited now by Plasmodium falciparum-resistant parasites, including that against artemisinin derivatives. Despite the large number of active compounds described in the literature, few of them reached full devel...

Plasmodium falciparum parasites overexpressing farnesyl diphosphate synthase/geranylgeranyl diphosphate synthase are more resistant to risedronate

Mem. Inst. Oswaldo Cruz; 113 (10), 2018
Farnesyl diphosphate synthase/geranylgeranyl diphosphate synthase (FPPS/GGPPS) is a key enzyme in the synthesis of isoprenic chains. Risedronate, a bisphosphonate containing nitrogen (N-BP), is a potent inhibitor of blood stage Plasmodium. Here, we show that P. falciparum parasites overexpressing FPPS/GG...

Ascorbate peroxidase overexpression protects Leishmania braziliensis against trivalent antimony effects

Mem. Inst. Oswaldo Cruz; 113 (12), 2018
Ascorbate peroxidase (APX) is a redox enzyme of the trypanothione pathway that converts hydrogen peroxide (H2O2) into water molecules. In the present study, the APX gene was overexpressed in Leishmania braziliensis to investigate its contribution to the trivalent antimony (SbIII)-resistance phenotype. We...

Overexpression of eukaryotic initiation factor 5A (eIF5A) affects susceptibility to benznidazole in Trypanosoma cruzi populations

Mem. Inst. Oswaldo Cruz; 113 (9), 2018
Eukaryotic initiation factor 5A (eIF5A) is a conserved protein with an essential role in translation elongation. Using one and two-dimensional western blotting, we showed that the eIF5A protein level was 2-fold lower in benznidazole (BZ)-resistant (BZR and 17LER) Trypanosoma cruzi populations than in the...

Resistencia a la poliquimioterapia en pacientes con enfermedad de Hansen

Rev. salud pública; 19 (6), 2017
RESUMEN Se describe un reporte de caso de un paciente del Sanatorio Agua de Dios Cundinamarca con diagnóstico de lepra lepromatosa histioide con sospecha de resistencia a la poliquimioterapia (PQT), evidenciando la importancia de los criterios clínicos para inicio de terapia alterna ante las limitacion...

Brotes hospitalarios de bacterias resistentes a colistina: revisión sistemática de la literatura

Infectio; 21 (4), 2017
Objetivo: La colistina se ha constituido en un medicamento de uso común en países endémicos en resistencia a carbapenémicos; sin embargo, con su uso ha emergido el reporte de resistencia. El objetivo de este estudio es describir los brotes hospitalarios por bacterias resistentes a colistina Materia...

Detection of tuberculosis drug resistance: a comparison by Mycobacterium tuberculosis MLPA assay versus Genotype®MTBDRplus

Mem. Inst. Oswaldo Cruz; 112 (6), 2017
BACKGROUND To cope with the emergence of multidrug-resistant tuberculosis (MDR-TB), new molecular methods that can routinely be used to screen for a wide range of drug resistance related genetic markers in the Mycobacterium tuberculosis genome are urgently needed. OBJECTIVE To evaluate the performance...

Urinary tract infection caused by community-acquired extended-spectrum β-lactamase-producing bacteria in infants

J. pediatr. (Rio J.); 93 (3), 2017
Abstract Objective: Urinary tract infection (UTI) caused by resistant strains of bacteria is increasingly prevalent in children. The aim of this study was to investigate the clinical characteristics and risk factors for UTI caused by community-acquired extended-spectrum β-lactamase (CA-ESBL)-produc...

Minimal inhibitory concentration distributions and epidemiological cutoff values of five antifungal agents against Sporothrix brasiliensis

Mem. Inst. Oswaldo Cruz; 112 (5), 2017
BACKGROUND Sporothrix brasiliensis is the most virulent sporotrichosis agent. This species usually responds to antifungal drugs, but therapeutic failure can occur in some patients. Antifungal susceptibility tests have been performed on this species, but no clinical breakpoints (CBPs) are available. In th...

Localização subcelular de XIAP: implicações na proliferação celular, resistência às drogas e prognóstico no câncer de mama

O câncer de mama é o tipo tumoral que mais acomete as mulheres no Brasil e no mundo, além de causar elevadas taxas de morbidade e mortalidade. Essa neoplasia tem como importante característica o desbalanço entre proliferação e morte celular. Nesse contexto, se insere a XIAP, uma proteína inibidor...