title: Synthesis and evaluation of PSSRI-based inhibitors of Staphylococcus aureus multidrug efflux pumps.
abstract: Phenylpiperidine selective serotonin reuptake inhibitors (PSSRIs) block the function of selected multidrug efflux pumps of Staphylococcus aureus. In this study PSSRI-based piperidine derivatives were prepared, evaluated for inhibition of two multidrug resistance (MDR)-conferring efflux pump systems, and tested for potentiation of antimicrobial activity of antibacterial efflux pump substrates. It is demonstrated that the 4-phenyl moiety of PSSRI-based efflux pump inhibitors (EPIs) is not an absolute structural requirement for inhibiting the NorA and MepA MDR efflux pumps. Potency of efflux inhibition is maintained or enhanced by replacing the aryloxymethyl substituent at position-3 of PSSRIs with arylalkene and arylthioether moieties. Novel 3-aryl piperidine EPIs that significantly increase substrate antibiotic activity against strains of S. aureus expressing NorA and MepA are described.
authors.affiliation: Division of Medicinal and Natural Products Chemistry, University of Iowa, College of Pharmacy, Iowa City, IA 52242, USA.
authors.forename: Nadezhda
authors.initials: N
authors.lastname: German
authors.forename: Glenn W
authors.initials: GW
authors.lastname: Kaatz
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Kerns
mesh_terms: D001426:Bacterial Proteins / Q000037:antagonists & inhibitors* / Q000378:metabolism; D001555:Benzene Derivatives / Q000138:chemical synthesis / Q000494:pharmacology; D024901:Drug Resistance, Multiple, Bacterial; D027425:ATP-Binding Cassette, Sub-Family C Proteins / Q000037:antagonists & inhibitors* / Q000378:metabolism; D010880:Piperidines / Q000138:chemical synthesis* / Q000494:pharmacology*; D017367:Selective Serotonin Reuptake Inhibitors / Q000138:chemical synthesis* / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000187:drug effects / Q000378:metabolism; D013329:Structure-Activity Relationship
chemical_list: D001426:Bacterial Proteins; D001555:Benzene Derivatives; D027425:ATP-Binding Cassette, Sub-Family C Proteins; D010880:Piperidines; D017367:Selective Serotonin Reuptake Inhibitors; C075040:NorA protein, Staphylococcus