title: Phenylpiperidine selective serotonin reuptake inhibitors interfere with multidrug efflux pump activity in Staphylococcus aureus.
abstract: Structural variants of phenylpiperidine selective serotonin reuptake inhibitors (P-SSRIs) inhibited the function of two unique Staphylococcus aureus multidrug efflux pumps. The most active compound was the paroxetine isomer NNC 20-7052, which had an IC(50) for ethidium, acriflavine, and pyronin Y efflux of 9, 53, and 18% of its MIC, respectively, against the NorA pump. The unbalanced effect of NNC 20-7052 on the efflux of different substrates suggests the possibility that P-SSRIs function by a physical interaction with NorA. Under the conditions employed pump inhibition partially extended to the resistance-nodulation-division (RND) pump AcrAB-TolC, but not to the Pseudomonas aeruginosa RND pumps MexAB-OprM or MexCD-OprJ.
mesh_terms: D001693:Biological Transport, Active / Q000187:drug effects; D024901:Drug Resistance, Multiple, Bacterial; D006863:Hydrogen-Ion Concentration; D008564:Membrane Potentials / Q000187:drug effects; D017374:Paroxetine / Q000737:chemistry / Q000494:pharmacology; D010880:Piperidines / Q000737:chemistry / Q000494:pharmacology; D017367:Selective Serotonin Reuptake Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000187:drug effects* / Q000378:metabolism*
chemical_list: D017374:Paroxetine; D010880:Piperidines; D017367:Selective Serotonin Reuptake Inhibitors; C010655:femoxetine