title: Accumulation of five fluoroquinolones by Mycobacterium tuberculosis H37Rv.
abstract: The accumulation of ciprofloxacin, norfloxacin, moxifloxacin, levofloxacin and ofloxacin by Mycobacterium tuberculosis H37Rv was determined with a modified fluorescence method. The time to achieve a steady-state concentration (SSC) of each agent in M. tuberculosis was 60-240 s. Moxifloxacin was accumulated to the lowest concentration and ciprofloxacin to the highest. However, ciprofloxacin took longer to achieve an SSC than the other four agents; levofloxacin reached steady state in the shortest time. Larger fluoroquinolones accumulated to the lowest concentration and more slowly. Although all five agents had low hydrophobicity values (P(app) < or =0.11), those with the lowest values accumulated to the higher concentrations.
authors.affiliation: Antimicrobial Agents Research Group, Division of Immunity and Infection, The Medical School, University of Birmingham, Vincent Drive, Edgbaston, Birmingham B15 2TT, UK. l.j.v.piddock@bham.ac.uk
authors.forename: L J
authors.initials: LJ
authors.lastname: Piddock
authors.forename: V
authors.initials: V
authors.lastname: Ricci
mesh_terms: D000890:Anti-Infective Agents / Q000493:pharmacokinetics*; D001372:Aza Compounds; D002939:Ciprofloxacin / Q000493:pharmacokinetics; D024841:Fluoroquinolones; D006801:Humans; D064704:Levofloxacin; D008826:Microbial Sensitivity Tests; D000077266:Moxifloxacin; D009169:Mycobacterium tuberculosis / Q000254:growth & development / Q000378:metabolism*; D009643:Norfloxacin / Q000493:pharmacokinetics; D015242:Ofloxacin / Q000493:pharmacokinetics; D011804:Quinolines
chemical_list: D000890:Anti-Infective Agents; D001372:Aza Compounds; D024841:Fluoroquinolones; D011804:Quinolines; D002939:Ciprofloxacin; D064704:Levofloxacin; D015242:Ofloxacin; D009643:Norfloxacin; D000077266:Moxifloxacin