| Literature DB >> 8467353 |
N M Griffiths1, B H Hirst, N L Simmons.
Abstract
The bidirectional transepithelial fluxes of ciprofloxacin, an antibacterial fluoroquinolone, across the human intestinal epithelial Caco-2 cell-line show marked asymmetry. Basal-to-apical flux of ciprofloxacin (10 microM) exceeds apical-to-basal flux indicating net secretion. Net ciprofloxacin secretion is abolished by azide/2-deoxy-D-glucose treatment, displays saturation kinetics (Km = 0.89 +/- 0.23 mM, Vmax 44.3 +/- 4.9 nmol cm-2.h) and competition by other fluoroquinolones. A specific, active secretion in Caco-2 epithelia may explain the transintestinal elimination of ciprofloxacin observed in pharmacokinetic studies in man.Entities:
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Year: 1993 PMID: 8467353 PMCID: PMC1908048 DOI: 10.1111/j.1476-5381.1993.tb12844.x
Source DB: PubMed Journal: Br J Pharmacol ISSN: 0007-1188 Impact factor: 8.739