Inhibitors of efflux pumps in Gram-negative bacteria.
In Gram-negative bacteria, efflux complexes, consisting of an inner-membrane pump, a periplasmic adaptor protein and outer-membrane channel, provide an efficient means for the export of structurally unrelated drugs, causing the multidrug-resistance phenotype. Resistance due to this antibiotic efflux is an increasing problem worldwide. A new molecular challenge is to combat this transport by searching for new molecules to block efflux and thus restore drug susceptibility to resistant clinical strains. Recent data shed new light on the structure and activity of the archetypal efflux pumps AcrAB-TolC and MexAB-OprM. Here, we describe recent insights into the molecular mechanisms of bacterial efflux pumps and their inhibitors. Current progress for the clinical use of efflux-pump inhibitors and new strategies to combat the drug-efflux mechanisms will be discussed.
EA2197, IFR48, Faculté de Médecine, Université de la Méditerranée, 13385-Marseille, France. Jean-Marie.Pages@medecine.univ-mrs.fr
Jean-Marie
JM
Pagès
Muriel
M
Masi
Jacques
J
Barbe
D000818:Animals; D001693:Biological Transport, Active; D024881:Drug Resistance, Bacterial / Q000187:drug effects / Q000502:physiology*; D006090:Gram-Negative Bacteria / Q000378:metabolism*; D016623:Ion Pumps / Q000037:antagonists & inhibitors* / Q000737:chemistry; D018942:Macrolides / Q000494:pharmacology*; D049990:Membrane Transport Modulators; D026901:Membrane Transport Proteins / Q000037:antagonists & inhibitors*
D016623:Ion Pumps; D018942:Macrolides; D049990:Membrane Transport Modulators; D026901:Membrane Transport Proteins