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Adam S, Fries F, von Tesmar A, Rasheed S, Deckarm S, Sousa CF, Reberšek R, Risch T, Mancini S, Herrmann J, Koehnke J, Kalinina OV, Müller R. The Peptide Antibiotic Corramycin Adopts a β-Hairpin-like Structure and Is Inactivated by the Kinase ComG. J Am Chem Soc 2024; 146:8981-8990. [PMID: 38513269 PMCID: PMC10996006 DOI: 10.1021/jacs.3c13208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/23/2024]
Abstract
The rapid development of antibiotic resistance, especially among difficult-to-treat Gram-negative bacteria, is recognized as a serious and urgent threat to public health. The detection and characterization of novel resistance mechanisms are essential to better predict the spread and evolution of antibiotic resistance. Corramycin is a novel and modified peptidic antibiotic with activity against several Gram-negative pathogens. We demonstrate that the kinase ComG, part of the corramycin biosynthetic gene cluster, phosphorylates and thereby inactivates corramycin, leading to the resistance of the host. Remarkably, we found that the closest structural homologues of ComG are aminoglycoside phosphotransferases; however, ComG shows no activity toward this class of antibiotics. The crystal structure of ComG in complex with corramycin reveals that corramycin adopts a β-hairpin-like structure and allowed us to define the changes leading to a switch in substrate from sugar to peptide. Bioinformatic analyses suggest a limited occurrence of ComG-like proteins, which along with the absence of cross-resistance to clinically used drugs positions corramycin as an attractive antibiotic for further development.
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Affiliation(s)
- Sebastian Adam
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
| | - Franziska Fries
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
- Department
of Pharmacy, Saarland University, 66123 Saarbrücken, Germany
- German
Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Alexander von Tesmar
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
| | - Sari Rasheed
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
- German
Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Selina Deckarm
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
| | - Carla F. Sousa
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
| | - Roman Reberšek
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
| | - Timo Risch
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
- Department
of Pharmacy, Saarland University, 66123 Saarbrücken, Germany
| | - Stefano Mancini
- Institute
of Medical Microbiology, University of Zürich, 8006 Zürich, Switzerland
| | - Jennifer Herrmann
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
- German
Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Jesko Koehnke
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
- Institute
of Food Chemistry, Leibniz University Hannover, Callinstraße 5, 30167 Hannover, Germany
| | - Olga V. Kalinina
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
- Faculty of
Medicine, Saarland University, 66421 Homburg , Germany
- Center for
Bioinformatics, Saarland University, 66123 Saarbrücken, Germany
| | - Rolf Müller
- Helmholtz
Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre
for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany
- Department
of Pharmacy, Saarland University, 66123 Saarbrücken, Germany
- German
Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
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Jana S, Rajasekaran P, Haldimann K, Vasella A, Böttger EC, Hobbie SN, Crich D. Synthesis of Gentamicins C1, C2, and C2a and Antiribosomal and Antibacterial Activity of Gentamicins B1, C1, C1a, C2, C2a, C2b, and X2. ACS Infect Dis 2023; 9:1622-1633. [PMID: 37481733 PMCID: PMC10425985 DOI: 10.1021/acsinfecdis.3c00233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Indexed: 07/25/2023]
Abstract
Complementing our earlier syntheses of the gentamicins B1, C1a, C2b, and X2, we describe the synthesis of gentamicins C1, C2, and C2a characterized by methyl substitution at the 6'-position, and so present an alternative access to previous chromatographic methods for accessing these sought-after compounds. We describe the antiribosomal activity of our full set of synthetic gentamicin congeners against bacterial ribosomes and hybrid ribosomes carrying the decoding A site of the human mitochondrial, A1555G mutant mitochondrial, and cytoplasmic ribosomes and establish structure-activity relationships with the substitution pattern around ring I to antiribosomal activity, antibacterial resistance due to the presence of aminoglycoside acetyl transferases acting on the 6'-position in ring I, and literature cochlear toxicity data.
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Affiliation(s)
- Santanu Jana
- Department
of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Complex
Carbohydrate Research Center, University
of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Parasuraman Rajasekaran
- Department
of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Complex
Carbohydrate Research Center, University
of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Klara Haldimann
- Institute
of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - Andrea Vasella
- Organic
Chemistry Laboratory, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zürich, Switzerland
| | - Erik C. Böttger
- Institute
of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - Sven N. Hobbie
- Institute
of Medical Microbiology, University of Zurich, Gloriastrasse 30, 8006 Zürich, Switzerland
| | - David Crich
- Department
of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Complex
Carbohydrate Research Center, University
of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
- Department
of Chemistry, University of Georgia, 302 East Campus Road, Athens, Georgia 30602, United States
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Imkamp F, Bodendoerfer E, Mancini S. QUIRMIA-A Phenotype-Based Algorithm for the Inference of Quinolone Resistance Mechanisms in Escherichia coli. Antibiotics (Basel) 2023; 12:1119. [PMID: 37508215 PMCID: PMC10376670 DOI: 10.3390/antibiotics12071119] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/30/2023] Open
Abstract
OBJECTIVES Quinolone resistance in Escherichia coli occurs mainly as a result of mutations in the quinolone-resistance-determining regions of gyrA and parC, which encode the drugs' primary targets. Mutational alterations affecting drug permeability or efflux as well as plasmid-based resistance mechanisms can also contribute to resistance, albeit to a lesser extent. Simplifying and generalizing complex evolutionary trajectories, low-level resistance towards fluoroquinolones arises from a single mutation in gyrA, while clinical high-level resistance is associated with two mutations in gyrA plus one mutation in parC. Both low- and high-level resistance can be detected phenotypically using nalidixic acid and fluoroquinolones such as ciprofloxacin, respectively. The aim of this study was to develop a decision tree based on disc diffusion data and to define epidemiological cut-offs to infer resistance mechanisms and to predict clinical resistance in E. coli. This diagnostic algorithm should provide a coherent genotype/phenotype classification, which separates the wildtype from any non-wildtype and further differentiates within the non-wildtype. METHODS Phenotypic susceptibility of 553 clinical E. coli isolates towards nalidixic acid, ciprofloxacin, norfloxacin and levofloxacin was determined by disc diffusion, and the genomes were sequenced. Based on epidemiological cut-offs, we developed a QUInolone Resistance Mechanisms Inference Algorithm (QUIRMIA) to infer the underlying resistance mechanisms responsible for the corresponding phenotypes, resulting in the categorization as "susceptible" (wildtype), "low-level resistance" (non-wildtype) and "high-level resistance" (non-wildtype). The congruence of phenotypes and whole genome sequencing (WGS)-derived genotypes was then assigned using QUIRMIA- and EUCAST-based AST interpretation. RESULTS QUIRMIA-based inference of resistance mechanisms and sequencing data were highly congruent (542/553, 98%). In contrast, EUCAST-based classification with its binary classification into "susceptible" and "resistant" isolates failed to recognize and properly categorize low-level resistant isolates. CONCLUSIONS QUIRMIA provides a coherent genotype/phenotype categorization and may be integrated in the EUCAST expert rule set, thereby enabling reliable detection of low-level resistant isolates, which may help to better predict outcome and to prevent the emergence of clinical resistance.
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Affiliation(s)
- Frank Imkamp
- Institute of Medical Microbiology, University of Zurich, 8006 Zurich, Switzerland
| | - Elias Bodendoerfer
- Institute of Medical Microbiology, University of Zurich, 8006 Zurich, Switzerland
| | - Stefano Mancini
- Institute of Medical Microbiology, University of Zurich, 8006 Zurich, Switzerland
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Barbu IC, Gheorghe-Barbu I, Grigore GA, Vrancianu CO, Chifiriuc MC. Antimicrobial Resistance in Romania: Updates on Gram-Negative ESCAPE Pathogens in the Clinical, Veterinary, and Aquatic Sectors. Int J Mol Sci 2023; 24:7892. [PMID: 37175597 PMCID: PMC10178704 DOI: 10.3390/ijms24097892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 04/20/2023] [Accepted: 04/21/2023] [Indexed: 05/15/2023] Open
Abstract
Multidrug-resistant Gram-negative bacteria such as Acinetobacter baumannii, Pseudomonas aeruginosa, and members of the Enterobacterales order are a challenging multi-sectorial and global threat, being listed by the WHO in the priority list of pathogens requiring the urgent discovery and development of therapeutic strategies. We present here an overview of the antibiotic resistance profiles and epidemiology of Gram-negative pathogens listed in the ESCAPE group circulating in Romania. The review starts with a discussion of the mechanisms and clinical significance of Gram-negative bacteria, the most frequent genetic determinants of resistance, and then summarizes and discusses the epidemiological studies reported for A. baumannii, P. aeruginosa, and Enterobacterales-resistant strains circulating in Romania, both in hospital and veterinary settings and mirrored in the aquatic environment. The Romanian landscape of Gram-negative pathogens included in the ESCAPE list reveals that all significant, clinically relevant, globally spread antibiotic resistance genes and carrying platforms are well established in different geographical areas of Romania and have already been disseminated beyond clinical settings.
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Affiliation(s)
- Ilda Czobor Barbu
- Microbiology-Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania
- The Research Institute of the University of Bucharest, 050095 Bucharest, Romania
| | - Irina Gheorghe-Barbu
- Microbiology-Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania
- The Research Institute of the University of Bucharest, 050095 Bucharest, Romania
| | - Georgiana Alexandra Grigore
- Microbiology-Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania
- The Research Institute of the University of Bucharest, 050095 Bucharest, Romania
- National Institute of Research and Development for Biological Sciences, 060031 Bucharest, Romania
| | - Corneliu Ovidiu Vrancianu
- Microbiology-Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania
- The Research Institute of the University of Bucharest, 050095 Bucharest, Romania
| | - Mariana Carmen Chifiriuc
- Microbiology-Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania
- The Research Institute of the University of Bucharest, 050095 Bucharest, Romania
- Academy of Romanian Scientists, 050044 Bucharest, Romania
- Romanian Academy, 010071 Bucharest, Romania
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Characterization of Carbapenemase-Producing Klebsiella pneumoniae Isolates from Two Romanian Hospitals Co-Presenting Resistance and Heteroresistance to Colistin. Antibiotics (Basel) 2022; 11:antibiotics11091171. [PMID: 36139950 PMCID: PMC9495256 DOI: 10.3390/antibiotics11091171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/12/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
Klebsiella pneumoniae is a notorious human pathogen involved in healthcare-associated infections. The worldwide expansion of infections induced by colistin-resistant and carbapenemase-producing Enterobacterales (CPE) isolates has been increasingly reported. This study aims to analyze the phenotypic and molecular profiles of 10 colistin-resistant (CR) isolates and 2 pairs of colistin-heteroresistant (ChR) (parental and the corresponding resistant mutants) isolates of K. pneumoniae CPE sourced from two hospitals. The phenotypes of strains in the selected collection had been previously characterized. Antimicrobial susceptibility testing was performed using a Vitek 2 Compact system (BioMérieux SA, Marcy l’Etoile, France), the disc diffusion method, and broth microdilution (BMD) for colistin. Whole-genome sequencing (WGS) did not uncover evidence of any mobile colistin resistance (mcr) genes, although the mgrB gene of seven isolates appeared to be disrupted by insertion sequences (ISKpn25 or ISKpn26). Possible deleterious missense mutations were found in phoP (L4F), phoQ (Q426L, L26Q, L224Q, Q317K), pmrB (R256G, P95L, T157P, V352E), and crrB (P151S) genes. The identified isolates belonged to the following clonal lineages: ST101 (n = 6), ST147 (n = 5), ST258 (n = 2), and ST307 (n = 1). All strains harbored IncF plasmids. OXA-48 producers carried IncL and IncR plasmids, while one blaNDM-1 genome was found to harbor IncC plasmids. Ceftazidime–avibactam remains a therapeutic option for KPC-2 and OXA-48 producers. Resistance to meropenem–vaborbactam has emerged in some blakPC-2-carrying isolates. Our study demonstrates that the results of WGS can provide essential evidence for the surveillance of antimicrobial resistance.
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Scaglione V, Reale M, Davoli C, Mazzitelli M, Serapide F, Lionello R, La Gamba V, Fusco P, Bruni A, Procopio D, Garofalo E, Longhini F, Marascio N, Peronace C, Giancotti A, Gallo L, Matera G, Liberto MC, Cesana BM, Costa C, Trecarichi EM, Quirino A, Torti C. Prevalence of Antibiotic Resistance Over Time in a Third-Level University Hospital. Microb Drug Resist 2021; 28:425-435. [PMID: 34910885 PMCID: PMC9058886 DOI: 10.1089/mdr.2021.0109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
This study evaluated the spread and possible changes in resistance patterns of ESKAPE bacteria to first-choice antibiotics from 2015 to 2019 at a third-level university hospital after persuasive stewardship measures were implemented. Isolates were divided into three groups (group 1, low drug-resistant; group 2, multidrug/extremely drug-resistant; and group 3, pan-resistant bacteria) and a chi-squared test (χ2) was applied to determine differences in their distributions. Among the 2,521 isolates, Klebsiella pneumoniae was the most frequently detected (31.1%). From 2015 to 2019, the frequency of isolates in groups 2 and 3 decreased from 70.1% to 48.6% (χ2 = 63.439; p < 0.0001). Stratifying isolates by bacterial species, for K. pneumoniae, the frequency of PDR isolates decreased from 20% to 1.3% (χ2 = 15.885; p = 0.003). For Acinetobacter baumannii, a statistically significant decrease was found in groups 2 and 3: from 100% to 83.3% (χ2 = 27.721; p < 0.001). Also, for Pseudomonas aeruginosa and Enterobacter spp., the frequency of groups 2 and 3 decreased from 100% to 28.3% (χ2 = 225.287; p < 0.001) and from 75% to 48.7% (χ2 = 15.408; p = 0.003), respectively. These results indicate that a program consisting of persuasive stewardship measures, which were rolled out during the time frame of our study, may be useful to control drug-resistant bacteria in a hospital setting.
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Affiliation(s)
- Vincenzo Scaglione
- Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Mariaconcetta Reale
- Unit of Clinical Microbiology, Department of Health Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Chiara Davoli
- Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Maria Mazzitelli
- Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Francesca Serapide
- Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Rosaria Lionello
- Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Valentina La Gamba
- Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Paolo Fusco
- Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Andrea Bruni
- Unit of Intensive Care, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Daniela Procopio
- Unit of Intensive Care, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Eugenio Garofalo
- Unit of Intensive Care, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Federico Longhini
- Unit of Intensive Care, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Nadia Marascio
- Unit of Clinical Microbiology, Department of Health Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Cinzia Peronace
- Unit of Clinical Microbiology, Department of Health Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Aida Giancotti
- Unit of Clinical Microbiology, Department of Health Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Luigia Gallo
- Unit of Clinical Microbiology, Department of Health Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Giovanni Matera
- Unit of Clinical Microbiology, Department of Health Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Maria Carla Liberto
- Unit of Clinical Microbiology, Department of Health Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Bruno Mario Cesana
- Unit of Medical Statistics, Biometrics and Bioinformatics "Giulio A. Maccacaro", Department of Clinical Sciences and Community Health, Faculty of Medicine and Surgery, University of Milan, Milan, Italy
| | - Chiara Costa
- Unit of Infectious and Tropical Diseases, "Mater Domini" Teaching Hospital, Catanzaro, Italy
| | - Enrico Maria Trecarichi
- Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Angela Quirino
- Unit of Clinical Microbiology, Department of Health Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Carlo Torti
- Unit of Infectious and Tropical Diseases, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
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Antimicrobial Resistance and Whole-Genome Characterisation of High-Level Ciprofloxacin-Resistant Salmonella Enterica Serovar Kentucky ST 198 Strains Isolated from Human in Poland. Int J Mol Sci 2021; 22:ijms22179381. [PMID: 34502290 PMCID: PMC8431004 DOI: 10.3390/ijms22179381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/26/2021] [Accepted: 08/26/2021] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Salmonella Kentucky belongs to zoonotic serotypes that demonstrate that the high antimicrobial resistance and multidrug resistance (including fluoroquinolones) is an emerging problem. To the best of our knowledge, clinical S. Kentucky strains isolated in Poland remain undescribed. METHODS Eighteen clinical S. Kentucky strains collected in the years 2018-2019 in Poland were investigated. All the strains were tested for susceptibility to 11 antimicrobials using the disc diffusion and E-test methods. Whole genome sequences were analysed for antimicrobial resistance genes, mutations, the presence and structure of SGI1-K (Salmonella Genomic Island and the genetic relationship of the isolates. RESULTS Sixteen of 18 isolates (88.9%) were assigned as ST198 and were found to be high-level resistant to ampicillin (>256 mg/L) and quinolones (nalidixic acid MIC ≥ 1024 mg/L, ciprofloxacin MIC range 6-16 mg/L). All the 16 strains revealed three mutations in QRDR of GyrA and ParC. The substitutions of Ser83 → Phe and Asp87 → Tyr of the GyrA subunit and Ser80→Ile of the ParC subunit were the most common. One S. Kentucky isolate had qnrS1 in addition to the QRDR mutations. Five of the ST198 strains, grouped in cluster A, had multiple resistant determinants like blaTEM1-B, aac(6')-Iaa, sul1 or tetA, mostly in SGI1 K. Seven strains, grouped in cluster B, had shorter SGI1-K with deletions of many regions and with few resistance genes detected. CONCLUSION The results of this study demonstrated that a significant part of S. Kentucky isolates from humans in Poland belonged to ST198 and were high-level resistant to ampicillin and quinolones.
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Vianello MA, Cardoso B, Fuentes-Castillo D, Moura Q, Esposito F, Fuga B, Lincopan N, Egito EST. International high-risk clone of fluoroquinolone-resistant Escherichia coli O15:H1-D-ST393 in remote communities of Brazilian Amazon. INFECTION GENETICS AND EVOLUTION 2021; 91:104808. [PMID: 33737229 DOI: 10.1016/j.meegid.2021.104808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 12/07/2020] [Accepted: 03/10/2021] [Indexed: 10/21/2022]
Abstract
The global dissemination of multidrug-resistant Escherichia coli lineages belonging to high- risk clones poses a significant public health threat. Herein we report the identification and genomic profiling of two multidrug-resistant E. coli strains [BL-II-03(2) and BL-II-11(3)] belonging to the O15:H1-D-ST393 (clonal complex 31) worldwide spread clone, isolated from fecal samples of indigenous peoples belonging to two different ethnic groups of remote communities of Brazilian Amazon. Genomic analysis revealed genes and mutations conferring resistance to β-lactams [blaTEM-1], aminoglycosides [aadA5, aph(3″)-Ib, aph(6)-Id], tetracyclines [tetB], sulfamethoxazole/trimethoprim [sul1, sul2, dfrA17], and fluoroquinolones [gyrA (D87N, S83L), parC (S80I, S57T), parE (L416F)]; and presence of IncQ1, IncFIA, and IncFIB(pB171) plasmids. On the other hand, phylogenomics of globally reported E. coli ST393 assigned E. coli strains BL-II-03(2) and BL-II-11(3) to a cluster comprising human isolates from Australia, Canada, China, Sweden, and United States of America. These results might provide valuable information for understanding dissemination of intercontinental multidrug-resistant clones in remote communities with low levels of antibiotic exposure.
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Affiliation(s)
- Marco Aurelio Vianello
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Brenda Cardoso
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Danny Fuentes-Castillo
- Department of Pathology, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Quézia Moura
- Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, Brazil
| | - Fernanda Esposito
- Department of Clinical Analysis, Faculty of Pharmacy, Universidade of São Paulo, São Paulo, Brazil
| | - Bruna Fuga
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil; Department of Clinical Analysis, Faculty of Pharmacy, Universidade of São Paulo, São Paulo, Brazil
| | - Nilton Lincopan
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil; Department of Clinical Analysis, Faculty of Pharmacy, Universidade of São Paulo, São Paulo, Brazil.
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Protective Effects of Liposomal Curcumin on Oxidative Stress/Antioxidant Imbalance, Metalloproteinases 2 and -9, Histological Changes and Renal Function in Experimental Nephrotoxicity Induced by Gentamicin. Antioxidants (Basel) 2021; 10:antiox10020325. [PMID: 33671770 PMCID: PMC7926985 DOI: 10.3390/antiox10020325] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Our study aimed to assess the efficiency of Curcumin nanoformulation (LCC) on experimental nephrotoxicity induced by Gentamicin in rats. METHODS Six groups of seven rats were used: C-(control group) received saline solution i.p. (i.p. = intraperitoneal), G-gentamicin (G, 80 mg/kg body weight (b.w.)), GCC1 and GCC2-with G and CC solution (single dose of 10 mg/kg b.w.-CC1, or 20 mg/kg b.w.-CC2), GLCC1 (10 mg/kg b.w.) and GLCC2 (20 mg/kg b.w.) with G and LCC administration. Oxidative stress parameters (NOx = nitric oxide, MDA = malondialdehyde, TOS = total oxidative stress), antioxidant parameters (CAT = catalase, TAC = total antioxidant capacity), matrix metalloproteinases (MMP-2 and MMP-9), and renal function parameters (creatinine, blood urea nitrogen, and urea) were measured. Kidneys histopathologic examination was made for each group. RESULTS Pretreatment with CC and LCC in both doses had significantly alleviating effects on assessed parameters (NOx, MDA, TOS, CAT, TAC, MMP-2, and -9) as compared with the untreated group (p < 0.006). Histopathological aspect and renal function were significantly improved in CC and LCC groups. Liposomal formulation (LCC) showed higher efficiency on all examined parameters compared to CC (p < 0.006). CONCLUSIONS Our results demonstrated improving renal function and kidney cytoarchitecture, oxidative stress/antioxidant/balance, and MMPs plasma concentrations with better dose-related efficacity of LCC than CC.
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Bodendoerfer E, Marchesi M, Imkamp F, Courvalin P, Böttger EC, Mancini S. Co-occurrence of aminoglycoside and β-lactam resistance mechanisms in aminoglycoside- non-susceptible Escherichia coli isolated in the Zurich area, Switzerland. Int J Antimicrob Agents 2020; 56:106019. [DOI: 10.1016/j.ijantimicag.2020.106019] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 04/28/2020] [Accepted: 05/01/2020] [Indexed: 02/06/2023]
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Mancini S, Röthlin K, Bodendoerfer E, Herren S, Kolesnik-Goldmann N, Courvalin P, Zbinden R, Böttger EC. Tentative breakpoints and areas of technical uncertainty for early reading automated disc diffusion for Enterobacterales. J Antimicrob Chemother 2020; 75:1495-1505. [PMID: 32155259 DOI: 10.1093/jac/dkaa051] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/15/2020] [Accepted: 01/28/2020] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Disc diffusion is a reliable, accurate and cost-efficient procedure for antimicrobial susceptibility testing (AST) but requires long (18-24 h) incubation times. Reading of disc diffusion after short incubation times (6-8 h) by automated systems is feasible but should be categorized with time-adapted breakpoints to reduce errors. OBJECTIVES This study systematically compared early readings (6 and 8 h) of disc diffusion using an automated system with that of the standard 18 h EUCAST method. Time-adapted tentative breakpoints were proposed to discriminate susceptible from resistant isolates and areas of technical uncertainty were defined to minimize the risk of errors. METHODS A total of 1106 Enterobacterales isolates with a wide variety of resistance mechanisms and resistance profiles were included. All isolates were analysed for susceptibility to amoxicillin/clavulanic acid, ceftriaxone, cefepime, meropenem, ciprofloxacin and gentamicin using the automated WASPLabTM system. Part of the collection (515 isolates) was also analysed for susceptibility to an additional 10 antibiotics. RESULTS Separation between WT and non-WT populations was poorer at early incubation times than following standard incubation. Editing of rapid automated AST results after 6 and 8 h incubation with time-adapted breakpoints resulted in 84.0% and 88.5% interpretable results with assignment to the resistant or susceptible category. Major error and very major error rates for the 6 h readings were only 0.4% and 0.3%, virtually identical to those of 18 h AST reading. CONCLUSIONS Time-adapted clinical breakpoints in disc diffusion testing for Enterobacterales allow for accurate automated AST interpretation after shortened incubation times for a large number of antibiotics, with the additional possibility of subsequent confirmation after 18 h incubation.
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Affiliation(s)
- Stefano Mancini
- Institut für Medizinische Mikrobiologie, Universität Zürich, Zürich, Switzerland
| | - Kim Röthlin
- Institut für Medizinische Mikrobiologie, Universität Zürich, Zürich, Switzerland
| | - Elias Bodendoerfer
- Institut für Medizinische Mikrobiologie, Universität Zürich, Zürich, Switzerland
| | - Sebastian Herren
- Institut für Medizinische Mikrobiologie, Universität Zürich, Zürich, Switzerland
| | | | | | - Reinhard Zbinden
- Institut für Medizinische Mikrobiologie, Universität Zürich, Zürich, Switzerland
| | - Erik C Böttger
- Institut für Medizinische Mikrobiologie, Universität Zürich, Zürich, Switzerland
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Touati A. Aminoglycoside resistance mechanism inference algorithm: Implication for underlying resistance mechanisms to aminoglycosides. EBioMedicine 2019; 46:8. [PMID: 31350220 PMCID: PMC6712273 DOI: 10.1016/j.ebiom.2019.07.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 07/16/2019] [Indexed: 11/24/2022] Open
Affiliation(s)
- Abdelaziz Touati
- Laboratoire d'Ecologie Microbienne, Université de Bejaia, 06000, Algeria.
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