title: Quinoline derivatives as promising inhibitors of antibiotic efflux pump in multidrug resistant Enterobacter aerogenes isolates.
abstract: Efflux pumps protect the bacterial cell by expelling toxic compounds before they reach intracellular targets. Because this mechanism actively contributes to the resistance of a given bacterium to more than one class of antibiotics, molecules that are able to block the relevant efflux pump are of potential significance to combat drug resistance caused by efflux pumps. Different quinoline derivatives including alkoxy, alkylamino, thioalkoxy and chloroquinolines have been previously reported to make Enterobacter aerogenes resistant isolates that over express the mechanism of efflux, noticeably more susceptible to structurally unrelated antibiotics. In addition, various quinoline derivatives significantly increase the intracellular concentration of chloramphenicol as reported with other inhibitors, thereby suggesting the inhibition of the drug transport by AcrAB-TolC pump, which is fully active in the clinicaly resistant isolates investigated. Here, we discuss the respective properties of this molecular family, taking into account the recent insights into the structural data of AcrB pump.
authors.affiliation: EA2197, IFR48, Faculté de Médecine, 27 Boulevard Jean Moulin, 13385 Marseille Cedex 5, France.
authors.forename: Abdallah
authors.initials: A
authors.lastname: Mahamoud
authors.forename: Jacqueline
authors.initials: J
authors.lastname: Chevalier
authors.forename: Anne
authors.initials: A
authors.lastname: Davin-Regli
authors.forename: Jacques
authors.initials: J
authors.lastname: Barbe
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Pagès
mesh_terms: D018435:ATP Binding Cassette Transporter, Subfamily B / Q000037:antagonists & inhibitors* / Q000378:metabolism; D000890:Anti-Infective Agents / Q000494:pharmacology; D002701:Chloramphenicol / Q000494:pharmacology; D024901:Drug Resistance, Multiple, Bacterial / Q000187:drug effects*; D004357:Drug Synergism; D021902:Enterobacter aerogenes / Q000187:drug effects* / Q000378:metabolism; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D011804:Quinolines / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D018435:ATP Binding Cassette Transporter, Subfamily B; D000890:Anti-Infective Agents; D011804:Quinolines; D002701:Chloramphenicol