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  • Title: Comparative penetration of lomefloxacin and other quinolones into human phagocytes.
    Author: Perea EJ, García I, Pascual A.
    Journal: Am J Med; 1992 Apr 06; 92(4A):48S-51S. PubMed ID: 1316071.
    Abstract:
    The penetration of lomefloxacin into human polymorphonuclear leukocytes (PMNs) and peritoneal macrophages (PMphis) was evaluated using a fluorometric assay. Lomefloxacin reached high intracellular concentrations into PMNs at extracellular concentrations of 2 and 5 mg/L (cellular to extracellular concentration ratio [C/E] greater than 4). At the same conditions (20 minutes incubation; extracellular concentrations: 2 mg/L) lomefloxacin uptake by human PMNs (C/E: 7.9 +/- 2.6) was slightly higher than those of norfloxacin (C/E 5.1 +/- 1.8), ciprofloxacin (C/E: 6.2 +/- 2.0), and ofloxacin (C/E 7.1 +/- 2.6). Lomefloxacin penetration into human PMphis was significantly lower than PMNs but still with C/E ratios greater than 4. Entry of lomefloxacin into phagocytes was not affected by cell viability but was environmental-temperature dependent. It is concluded that lomefloxacin and the other quinolones evaluated reach high intracellular concentrations in human phagocytic cells.
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