Artículo
Uptake and intracellular activity of trovafloxacin in human phagocytes and tissue-cultured epithelial cells
Autor/es | Pascual Hernández, Álvaro
Ballesta Mudarra, Sofía Perea Pérez, Evelio José |
Departamento | Universidad de Sevilla. Departamento de Microbiología |
Fecha de publicación | 1997-02-01 |
Fecha de depósito | 2017-10-04 |
Publicado en |
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Resumen | The penetration of trovafloxacin into human polymorphonuclear leukocytes (PMNs), human peritoneal macrophages, and tissue-cultured epithelial cells (McCoy cells) was evaluated. The cellular concentration to extracellular ... The penetration of trovafloxacin into human polymorphonuclear leukocytes (PMNs), human peritoneal macrophages, and tissue-cultured epithelial cells (McCoy cells) was evaluated. The cellular concentration to extracellular concentration (C/E) ratios of trovafloxacin were greater than 9 for extracellular concentrations ranging from 0.5 to 25 μg/ml. The uptake of trovafloxacin by PMNs was rapid, reversible, nonsaturable, not energy dependent, and significantly increased at pH 6. The C/E ratios of trovafloxacin were not affected by cell viability but were significantly increased at 4°C. Ingestion of opsonized zymosan, but not opsonized Staphylococcus aureus, significantly increased the amount of PMN-associated trovafloxacin. This agent at concentrations of 0.5 and 1 μg/ml induced a greater reduction in the survival of intracellular S. aureus in PMNs than ciprofloxacin and ofloxacin. It was concluded that trovafloxacin reaches concentrations within phagocytic and nonphagocytic cells several times higher than the extracellular ones, while it remains active in PMNs. |
Cita | Pascual Hernández, Á., Ballesta Mudarra, S. y Perea Pérez, E.J. (1997). Uptake and intracellular activity of trovafloxacin in human phagocytes and tissue-cultured epithelial cells. Antimicrobial Agents and Chemotherapy, 41 (2), 274-277. |
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