1154757-24-0CN[C@@H]1[C@@H](O)[C@@H](O[C@@H]2[C@@H](O)[C@H](O[C@H]3OC(CNCCO)=CC[C@H]3N)[C@@H](N)C[C@H]2NC(=O)[C@@H](O)CCN)OC[C@]1(C)OIYDYFVUFSPQPPV-PEXOCOHZSA-NDeveloped by Achaogen biopharmaceuticals, plazomicin is a next-generation aminoglycoside synthetically derived from [DB12604]. The structure of plazomicin was established via appending hydroxylaminobutyric acid to [DB12604] at position 1 and 2-hydroxyethyl group at position 6'. It was designed to evade all clinically relevant aminoglycoside-modifying enzymes, which contribute to the main resistance mechanism for aminoglycoside therapy. However, acquired resistance of aminoglycosides may arise through over expression of efflux pumps and ribosomal modification by bacteria, which results from amino acid or rRNA sequence mutations. Like other aminoglycosides, plazomicin is ineffective against bacterial isolates that produce 16S rRNA methyltransferases. Plazomicin mediates the antibacterial activity against pathogens including carbapenem-resistant (CRE) and extended-spectrum beta-lactamase (ESBL) producing Enterobacteriaceae. It mediates the antibacterial activity by binding to bacterial 30S ribosomal subunit and inhibiting protein synthesis. On June 28th, 2018, plazomicin sulfate was approved by the FDA for use in adult patients for the treatment of complicated urinary tract infections (cUTI) including Pyelonephritis. It is marketed as Zemdri and is administered via once-daily intravenous infusion.
Breast Feeding; Lactation; Milk, Human; Antibacterial Agents; Anti-Infective Agents; Aminoglycosides
Reserve group antibiotics
J - Antiinfectives for systemic use
QJ - Antiinfectives for systemic use
J01GB14
Plazomicin exerts its antibacterial activity in a dose-dependent manner with a post-antibiotic effect ranging from 0.2 to 2.6 hours at 2X MIC against _Enterobacteriaceae_, as demonstrated by _in vitro_ studies. In clinical trials comprising of hospitalized adult patients with cUTI (including pyelonephritis), resolution or improvement of clinical cUTI symptoms and a microbiological outcome of eradication were observed at day 5 following the first dose administration of plazomicin. Plazomicin has shown to elicit nephrotoxic, ototoxic, and neuromuscular blocking effects. In clinical trials, it did not induce any clinically relevant QTc-prolonging effects.
Plazomicin exerts a bactericidal action against susceptible bacteria by binding to bacterial 30S ribosomal subunit. Aminoglycosides typically bind to the ribosomal aminoacyl-tRNA site (A-site) and induce a conformational change to further facilitate the binding between the rRNA and the antibiotic. This leads to codon misreading and mistranslation of mRNA during bacterial protein synthesis. Plazomicin demonstrates potency against _Enterobacteriaceae_, including species with multidrug-resistant phenotypes such as carbapenemase-producing bacteria and isolates with resistance to all other aminoglycosides. Its antibacterial activity is not inhibited by aminoglycoside modifying enzymes (AMEs) produced by bacteria, such as acetyltransferases (AACs), phosphotransferases (APHs), and nucleotidyltransferases (ANTs). Plazomicin was shown to be effective against _Enterobacteriaceae_ in presence of some beta-lactamases. In clinical settings and _in vivo_, bacteria shown to be susceptible toward plazomicin include _Escherichia_ _coli_, _Klebsiella pneumoniae_, _Proteus mirabilis_, and _Enterobacter cloacae_. Other aerobic bacteria that may be affected by plazomicin are _Citrobacter freundii_, _Citrobacter koseri_, _Enterobacter aerogenes_, _Klebsiella oxytoca_, _Morganella morganii_, _Proteus vulgaris_, _Providencia stuartii_, and _Serratia marcescens_.
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1154757-24-0DTXSID001031303CHEMBL1650559Administration of 15 mg/kg plazomicin by 30-minute IV infusion resulted in peak plasma concentrations of 73.7 ± 19.7 μg/mL in healthy adult subjects and 51.0 ± 26.7 μg/mL in patients with complicated urinary tract infections (cUTI). The area under the curve (AUC) were 257 ± 67.0 μg.h/mL in healthy adults and 226 ± 113 μg.h/mL in cUTI patients.
Plazomicin predominantly undergoes renal excretion, where 56% of the total administered drug was recovered in the urine within 4 hours following a single 15 mg/kg IV dose of radiolabeled plazomicin in healthy subjects. About less than 0.2% and 89.1% of the total drug were recovered within 168 hours in feces and urine, respectively.
The mean (±SD) volume of distribution is 17.9 (±4.8) L in healthy adults and 30.8 (±12.1) L in cUTI patients.
Following administration of 15 mg/kg plazomicin by 30-minute IV infusion, the mean (±SD) total body clearance in healthy adults and cUTI patients is 4.5 (±0.9) and 5.1 (±2.01) L/h, respectively.
개요Plazomicin (PLZ) is a novel aminoglycoside approved by the U.S. Food and Drug Administration (FDA) for the treatment of complicated urinary tract infections (cUTI, including acute pyelonephritis) in adults due to multidrug-resistant carbapenem-resistant Enterobacterales (CRE) or extended-spectrum beta-lactamase (ESBL) producing bacteria. Despite the FDA Black Box Warning for aminoglycoside class effects, PLZ exhibited a favourable safety profile with decreased adverse effects in the largest in-human trials. In vitro, activity of PLZ, in comparison with that of other aminoglycosides, was found to be excellent, with 92.3% to 98.0% overall susceptibility in Enterobacterales, including CRE. Recently, PLZ was also shown to be active against certain multidrug-resistant (MDR) and extensively drug-resistant (XDR) Gram-negative pathogens for which limited treatment options are left[1-2].