Plazomicin: an investigational therapy for the treatment of urinary tract infections
Abstract
INTRODUCTION: Living in the ever-expanding era of multidrug-resistant (MDR), extensively drug-resistant (XDR), and even pandrug-resistant Gram-negative microorganisms, the medical community is facing the approaching fear of the "End of Antibiotics." Plazomicin is a next-generation aminoglycoside designed to evade all clinically relevant aminoglycoside-modifying enzymes, the main mechanism of aminoglycoside resistance. A newer aminoglycoside active against several MDR-XDR microorganisms is herein presented and discussed.
AREAS COVERED: Herein, the authors present the currently available information on plazomicin. This includes the current knowledge concerning plazomicin's: mechanisms of action, in vitro activity and interactions, its pharmacokinetics, its clinical efficacy in complicated urinary tract infections (cUTIs) and acute pyelonephritis, and its toxicity issues.
EXPERT OPINION: Plazomicin was developed to evade all clinically relevant aminoglycoside-modifying enzymes. Unfortunately, ribosomal enzymatic modification by ribosomal 16S-rRNA methyltransferases confers broad-spectrum high-level aminoglycoside resistance. Still, plazomicin demonstrates high activity against the Enterobacteriaceae including extended spectrum beta lactamase and most carbapenemase producers, as well as several of the non-fermenters. When compared to levofloxacin, the in vivo activity of plazomicin in complicated urinary tract infections (cUTIs) and in acute pyelonephritis in humans was very…
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