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Moi D, Deplano A, Angeli A, Balboni G, Supuran CT, Onnis V. Synthesis of Sulfonamides Incorporating Piperidinyl-Hydrazidoureido and Piperidinyl-Hydrazidothioureido Moieties and Their Carbonic Anhydrase I, II, IX and XII Inhibitory Activity. Molecules 2022; 27:molecules27175370. [PMID: 36080139 PMCID: PMC9457746 DOI: 10.3390/molecules27175370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/19/2022] [Accepted: 08/20/2022] [Indexed: 11/16/2022] Open
Abstract
Here we report a small library of hydrazinocarbonyl-ureido and thioureido benzenesulfonamide derivatives, designed and synthesized as potent and selective human carbonic anhydrase inhibitors (hCAIs). The synthesized compounds were evaluated against isoforms hCA I, II, IX and XII using acetazolamide (AAZ) as standard inhibitor. Several urea and thiourea derivatives showed inhibitory activity at low nanomolar levels with selectivity against the cytosolic hCA II isoform, as well as the transmembrane, tumor-associated enzymes hCA IX and XII. The thiourea derivatives showed enhanced potency as compared to urea analogues. Additionally, eight compounds 5g, 5m, 5o, 5q, 6l, 6j, 6o and 6u were selected for docking analysis on isoform I, II, IX, XII to illustrate the potential interaction with the enzyme to better understand the activity against the different isoforms.
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Affiliation(s)
- Davide Moi
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Monserrato University Campus, 09042 Monserrato, Italy
| | - Alessandro Deplano
- Pharmacelera, Torre R, 4a Planta, Despatx A05, Parc Cientific de Barcelona, Baldiri Reixac 8, 08028 Barcelona, Spain
| | - Andrea Angeli
- Polo Scientifico Neurofarba Department, Laboratorio di Chimica Bioinorganica, Università Degli Studi di Firenze, Room 188, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
| | - Gianfranco Balboni
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Monserrato University Campus, 09042 Monserrato, Italy
| | - Claudiu T. Supuran
- Polo Scientifico Neurofarba Department, Laboratorio di Chimica Bioinorganica, Università Degli Studi di Firenze, Room 188, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
- Correspondence: (C.T.S.); (V.O.)
| | - Valentina Onnis
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Monserrato University Campus, 09042 Monserrato, Italy
- Correspondence: (C.T.S.); (V.O.)
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El Khoury L, Jing Z, Cuzzolin A, Deplano A, Loco D, Sattarov B, Hédin F, Wendeborn S, Ho C, El Ahdab D, Jaffrelot Inizan T, Sturlese M, Sosic A, Volpiana M, Lugato A, Barone M, Gatto B, Macchia ML, Bellanda M, Battistutta R, Salata C, Kondratov I, Iminov R, Khairulin A, Mykhalonok Y, Pochepko A, Chashka-Ratushnyi V, Kos I, Moro S, Montes M, Ren P, Ponder JW, Lagardère L, Piquemal JP, Sabbadin D. Computationally driven discovery of SARS-CoV-2 M pro inhibitors: from design to experimental validation. Chem Sci 2022; 13:3674-3687. [PMID: 35432906 PMCID: PMC8966641 DOI: 10.1039/d1sc05892d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 02/03/2022] [Indexed: 11/21/2022] Open
Abstract
We report a fast-track computationally driven discovery of new SARS-CoV-2 main protease (Mpro) inhibitors whose potency ranges from mM for the initial non-covalent ligands to sub-μM for the final covalent compound (IC50 = 830 ± 50 nM). The project extensively relied on high-resolution all-atom molecular dynamics simulations and absolute binding free energy calculations performed using the polarizable AMOEBA force field. The study is complemented by extensive adaptive sampling simulations that are used to rationalize the different ligand binding poses through the explicit reconstruction of the ligand–protein conformation space. Machine learning predictions are also performed to predict selected compound properties. While simulations extensively use high performance computing to strongly reduce the time-to-solution, they were systematically coupled to nuclear magnetic resonance experiments to drive synthesis and for in vitro characterization of compounds. Such a study highlights the power of in silico strategies that rely on structure-based approaches for drug design and allows the protein conformational multiplicity problem to be addressed. The proposed fluorinated tetrahydroquinolines open routes for further optimization of Mpro inhibitors towards low nM affinities. The dominant binding mode of the QUB-00006-Int-07 main protease inhibitor during absolute binding free energy simulations.![]()
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Affiliation(s)
- Léa El Khoury
- Qubit Pharmaceuticals, Incubateur Paris Biotech Santé 24 Rue du Faubourg Saint Jacques 75014 Paris France
| | - Zhifeng Jing
- Qubit Pharmaceuticals, Incubateur Paris Biotech Santé 24 Rue du Faubourg Saint Jacques 75014 Paris France
| | - Alberto Cuzzolin
- Chiesi Farmaceutici S.p.A, Nuovo Centro Ricerche Largo Belloli 11a 43122 Parma Italy
| | - Alessandro Deplano
- Pharmacelera, Torre R, 4a planta Despatx A05, Parc Cientific de Barcelona, Baldiri Reixac 8 08028 Barcelona Spain
| | - Daniele Loco
- Qubit Pharmaceuticals, Incubateur Paris Biotech Santé 24 Rue du Faubourg Saint Jacques 75014 Paris France
| | - Boris Sattarov
- Qubit Pharmaceuticals, Incubateur Paris Biotech Santé 24 Rue du Faubourg Saint Jacques 75014 Paris France
| | - Florent Hédin
- Qubit Pharmaceuticals, Incubateur Paris Biotech Santé 24 Rue du Faubourg Saint Jacques 75014 Paris France
| | - Sebastian Wendeborn
- University of Applied Sciences and Arts Northwestern Switzerland, School of LifeSciences Hofackerstrasse 30 CH-4132 Muttenz Switzerland
| | - Chris Ho
- Qubit Pharmaceuticals, Incubateur Paris Biotech Santé 24 Rue du Faubourg Saint Jacques 75014 Paris France
| | - Dina El Ahdab
- Sorbonne Université, Laboratoire de Chimie Théorique, UMR 7616 CNRS 75005 Paris France
| | - Theo Jaffrelot Inizan
- Sorbonne Université, Laboratoire de Chimie Théorique, UMR 7616 CNRS 75005 Paris France
| | - Mattia Sturlese
- Molecular Modeling Section, Department of Pharmaceutical and Pharmacological Sciences, University of Padua via F. Marzolo 5 35131 Padova Italy
| | - Alice Sosic
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova via Marzolo 5 35131 Padova Italy
| | - Martina Volpiana
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova via Marzolo 5 35131 Padova Italy
| | - Angela Lugato
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova via Marzolo 5 35131 Padova Italy
| | - Marco Barone
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova via Marzolo 5 35131 Padova Italy
| | - Barbara Gatto
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova via Marzolo 5 35131 Padova Italy
| | - Maria Ludovica Macchia
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova via Marzolo 5 35131 Padova Italy
| | - Massimo Bellanda
- Department of Chemistry, University of Padova via Marzolo 1 35131 Padova Italy
| | - Roberto Battistutta
- Department of Chemistry, University of Padova via Marzolo 1 35131 Padova Italy
| | - Cristiano Salata
- Department of Molecular Medicine, University of Padua via Gabelli 63 35121 Padova Italy
| | | | - Rustam Iminov
- Enamine Ltd 78 Chervonotkats'ka Str. Kyiv 02094 Ukraine
| | | | | | | | | | - Iaroslava Kos
- Enamine Ltd 78 Chervonotkats'ka Str. Kyiv 02094 Ukraine
| | - Stefano Moro
- Molecular Modeling Section, Department of Pharmaceutical and Pharmacological Sciences, University of Padua via F. Marzolo 5 35131 Padova Italy
| | - Matthieu Montes
- Laboratoire GBCM, EA7528, Conservatoire National des Arts et Métiers, Hesam Université 2 Rue Conte 75003 Paris France
| | - Pengyu Ren
- University of Texas at Austin, Department of Biomedical Engineering TX 78712 USA
| | - Jay W Ponder
- Department of Chemistry, Washington University in Saint Louis MO 63130 USA.,Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine MO 63110 USA
| | - Louis Lagardère
- Sorbonne Université, Laboratoire de Chimie Théorique, UMR 7616 CNRS 75005 Paris France
| | - Jean-Philip Piquemal
- Sorbonne Université, Laboratoire de Chimie Théorique, UMR 7616 CNRS 75005 Paris France .,Institut Universitaire de France 75005 Paris France
| | - Davide Sabbadin
- Qubit Pharmaceuticals, Incubateur Paris Biotech Santé 24 Rue du Faubourg Saint Jacques 75014 Paris France
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Deplano A, Karlsson J, Moraca F, Svensson M, Cristiano C, Morgillo CM, Fowler CJ, Russo R, Catalanotti B, Onnis V. Design, synthesis and in vitro and in vivo biological evaluation of flurbiprofen amides as new fatty acid amide hydrolase/cyclooxygenase-2 dual inhibitory potential analgesic agents. J Enzyme Inhib Med Chem 2021; 36:940-953. [PMID: 33896320 PMCID: PMC8079065 DOI: 10.1080/14756366.2021.1875459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Compounds combining dual inhibitory action against FAAH and cyclooxygenase (COX) may be potentially useful analgesics. Here, we describe a novel flurbiprofen analogue, N-(3-bromopyridin-2-yl)-2-(2-fluoro-(1,1'-biphenyl)-4-yl)propanamide (Flu-AM4). The compound is a competitive, reversible inhibitor of FAAH with a Ki value of 13 nM and which inhibits COX activity in a substrate-selective manner. Molecular modelling suggested that Flu-AM4 optimally fits a hydrophobic pocket in the ACB region of FAAH, and binds to COX-2 similarly to flurbiprofen. In vivo studies indicated that at a dose of 10 mg/kg, Flu-AM4 was active in models of prolonged (formalin) and neuropathic (chronic constriction injury) pain and reduced the spinal expression of iNOS, COX-2, and NFκB in the neuropathic model. Thus, the present study identifies Flu-AM4 as a dual-action FAAH/substrate-selective COX inhibitor with anti-inflammatory and analgesic activity in animal pain models. These findings underscore the potential usefulness of such dual-action compounds.
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Affiliation(s)
- Alessandro Deplano
- Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, Department of Life and Environmental Sciences, University of Cagliari, Monserrato, Italy
| | - Jessica Karlsson
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Federica Moraca
- Department of Pharmacy, University of Naples Federico II, Naples, Italy.,Net4Science srl, University "Magna Graecia", Catanzaro, Italy
| | - Mona Svensson
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Claudia Cristiano
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Carmine Marco Morgillo
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, School of Life Sciences, University of Dundee, Dundee, UK
| | | | - Roberto Russo
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Bruno Catalanotti
- Department of Pharmacy, University of Naples Federico II, Naples, Italy
| | - Valentina Onnis
- Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, Department of Life and Environmental Sciences, University of Cagliari, Monserrato, Italy
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Deplano A, Karlsson J, Svensson M, Moraca F, Catalanotti B, Fowler CJ, Onnis V. Exploring the fatty acid amide hydrolase and cyclooxygenase inhibitory properties of novel amide derivatives of ibuprofen. J Enzyme Inhib Med Chem 2020; 35:815-823. [PMID: 32200655 PMCID: PMC7144264 DOI: 10.1080/14756366.2020.1743283] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Inhibition of fatty acid amide hydrolase (FAAH) reduces the gastrointestinal damage produced by non-steroidal anti-inflammatory agents such as sulindac and indomethacin in experimental animals, suggesting that a dual-action FAAH-cyclooxygenase (COX) inhibitor could have useful therapeutic properties. Here, we have investigated 12 novel amide analogues of ibuprofen as potential dual-action FAAH/COX inhibitors. N-(3-Bromopyridin-2-yl)−2-(4-isobutylphenyl)propanamide (Ibu-AM68) was found to inhibit the hydrolysis of [3H]anandamide by rat brain homogenates by a reversible, mixed-type mechanism of inhibition with a Ki value of 0.26 µM and an α value of 4.9. At a concentration of 10 µM, the compound did not inhibit the cyclooxygenation of arachidonic acid by either ovine COX-1 or human recombinant COX-2. However, this concentration of Ibu-AM68 greatly reduced the ability of the COX-2 to catalyse the cyclooxygenation of the endocannabinoid 2-arachidonoylglycerol. It is concluded that Ibu-AM68 is a dual-acting FAAH/substrate-selective COX inhibitor.
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Affiliation(s)
- Alessandro Deplano
- Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
| | - Jessica Karlsson
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Mona Svensson
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Federica Moraca
- Department of Pharmacy, University of Napoli Federico II, Napoli, Italy
| | - Bruno Catalanotti
- Department of Pharmacy, University of Napoli Federico II, Napoli, Italy
| | | | - Valentina Onnis
- Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
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Deplano A, Karlsson J, Fowler CJ, Onnis V. Corrigendum to "The fatty acid amide hydrolase and cyclooxygenase-inhibitory properties of novel amide derivatives of carprofen" [Bioorg. Chem. 101 (2020) 104034]. Bioorg Chem 2020; 103:104241. [PMID: 32889379 DOI: 10.1016/j.bioorg.2020.104241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Alessandro Deplano
- Department of Life and Environmental Sciences - Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Cagliari, Italy
| | - Jessica Karlsson
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | | | - Valentina Onnis
- Department of Life and Environmental Sciences - Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Cagliari, Italy.
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6
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Vazquez J, Deplano A, Herrero A, Gibert E, Herrero E, Luque FJ. Assessing the Performance of Mixed Strategies To Combine Lipophilic Molecular Similarity and Docking in Virtual Screening. J Chem Inf Model 2020; 60:4231-4245. [PMID: 32364713 DOI: 10.1021/acs.jcim.9b01191] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The accuracy of structure-based (SB) virtual screening (VS) is heavily affected by the scoring function used to rank a library of screened compounds. Even in cases where the docked pose agrees with the experimental binding mode of the ligand, the limitations of current scoring functions may lead to sensible inaccuracies in the ability to discriminate between actives and inactives. In this context, the combination of SB and ligand-based (LB) molecular similarity may be a promising strategy to increase the hit rates in VS. This study explores different strategies that aim to exploit the synergy between LB and SB methods in order to mitigate the limitations of these techniques, and to enhance the performance of VS studies by means of a balanced combination between docking scores and three-dimensional (3D) similarity. Particularly, attention is focused to the use of measurements of molecular similarity with PharmScreen, which exploits the 3D distribution of atomic lipophilicity determined from quantum mechanical-based continuum solvation calculations performed with the MST model, in conjunction with three docking programs: Glide, rDock, and GOLD. Different strategies have been explored to combine the information provided by docking and similarity measurements for re-ranking the screened ligands. For a benchmarking of 44 datasets, including 41 targets, the hybrid methods increase the identification of active compounds, according to the early (ROCe%) and total (AUC) enrichment metrics of VS, compared to pure LB and SB methods. Finally, the hybrid approaches are also more effective in enhancing the chemical diversity of active compounds. The datasets employed in this work are available in https://github.com/Pharmacelera/Molecular-Similarity-and-Docking.
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Affiliation(s)
- Javier Vazquez
- Pharmacelera, Plaça Pau Vila, 1, Sector C 2a, Edificio Palau de Mar, Barcelona 08039, Spain.,Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Sciences, Institute of Biomedicine (IBUB), and Institute of Theoretical and Computational Chemistry (IQTC-UB), University of Barcelona, Av. Prat de la Riba 171, Santa Coloma de Gramanet E-08921, Spain
| | - Alessandro Deplano
- Pharmacelera, Plaça Pau Vila, 1, Sector C 2a, Edificio Palau de Mar, Barcelona 08039, Spain
| | - Albert Herrero
- Pharmacelera, Plaça Pau Vila, 1, Sector C 2a, Edificio Palau de Mar, Barcelona 08039, Spain
| | - Enric Gibert
- Pharmacelera, Plaça Pau Vila, 1, Sector C 2a, Edificio Palau de Mar, Barcelona 08039, Spain
| | - Enric Herrero
- Pharmacelera, Plaça Pau Vila, 1, Sector C 2a, Edificio Palau de Mar, Barcelona 08039, Spain
| | - F Javier Luque
- Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Sciences, Institute of Biomedicine (IBUB), and Institute of Theoretical and Computational Chemistry (IQTC-UB), University of Barcelona, Av. Prat de la Riba 171, Santa Coloma de Gramanet E-08921, Spain
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Moi D, Nocentini A, Deplano A, Osman SM, AlOthman ZA, Piras V, Balboni G, Supuran CT, Onnis V. Appliance of the piperidinyl-hydrazidoureido linker to benzenesulfonamide compounds: Synthesis, in vitro and in silico evaluation of potent carbonic anhydrase II, IX and XII inhibitors. Bioorg Chem 2020; 98:103728. [PMID: 32182519 DOI: 10.1016/j.bioorg.2020.103728] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/03/2020] [Accepted: 03/05/2020] [Indexed: 01/10/2023]
Abstract
Herein we report on a new series of hydrazidoureidobenzensulfonamides investigated as inhibitors of the cytosolic human (h) hCA I and II isoforms, as well as the transmembrane, tumor-associated enzymes hCA IX and XII. The reported derivatives contain a 4-substituted piperidine fragment in which the hydrazidoureido linker has been involved as spacer between the benzenesulfonamide fragment which binds the zinc ion from the active site, and the tail of the inhibitor. Depending on the substitution pattern at the piperidine ring, low nanomolar inhibitors were detected against hCA II, hCA IX and hCA XII, making the new class of sulfonamides of interest for various pharmacologic applications.
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Affiliation(s)
- Davide Moi
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, University Campus, S.P. n° 8, Km 0.700, I-09042 Monserrato (CA), Italy
| | - Alessio Nocentini
- Department NEUROFARBA - Pharmaceutical and Nutraceutical Section, University of Firenze, via Ugo Schiff 6, I-50019 Sesto Fiorentino, Firenze, Italy
| | - Alessandro Deplano
- Pharmacelera, Placa Pau Vila, 1, Sector 1, Edificio Palau de Mar, Barcelona 08039, Spain
| | - Sameh M Osman
- Chemistry Department, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Zeid A AlOthman
- Chemistry Department, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Valentina Piras
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, University Campus, S.P. n° 8, Km 0.700, I-09042 Monserrato (CA), Italy
| | - Gianfranco Balboni
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, University Campus, S.P. n° 8, Km 0.700, I-09042 Monserrato (CA), Italy
| | - Claudiu T Supuran
- Department NEUROFARBA - Pharmaceutical and Nutraceutical Section, University of Firenze, via Ugo Schiff 6, I-50019 Sesto Fiorentino, Firenze, Italy.
| | - Valentina Onnis
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, University Campus, S.P. n° 8, Km 0.700, I-09042 Monserrato (CA), Italy.
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Nocentini A, Moi D, Deplano A, Osman SM, AlOthman ZA, Balboni G, Supuran CT, Onnis V. Sulfonamide/sulfamate switch with a series of piperazinylureido derivatives: Synthesis, kinetic and in silico evaluation as carbonic anhydrase isoforms I, II, IV, and IX inhibitors. Eur J Med Chem 2020; 186:111896. [DOI: 10.1016/j.ejmech.2019.111896] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/15/2019] [Accepted: 11/15/2019] [Indexed: 01/05/2023]
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Moi D, Nocentini A, Deplano A, Balboni G, Supuran CT, Onnis V. Structure-activity relationship with pyrazoline-based aromatic sulfamates as carbonic anhydrase isoforms I, II, IX and XII inhibitors: Synthesis and biological evaluation. Eur J Med Chem 2019; 182:111638. [PMID: 31472471 DOI: 10.1016/j.ejmech.2019.111638] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/21/2019] [Accepted: 08/21/2019] [Indexed: 12/16/2022]
Abstract
Four new series of aromatic sulfamates were synthesized and investigated for the inhibition of four human (h) isoforms of zinc enzyme carbonic anhydrase (CA, EC 4.2.1.1), hCA I, II, IX, and XII. The reported derivatives, obtained by a sulfamoylation reaction of the corresponding phenolic precursors, bear 3,5-diarylpyrazoline moieties as spacers between the benzenesulfamate fragment which binds the zinc ion from the active site, and the tail of the inhibitor. Pyrazolines are biologically privileged scaffolds, endowed with versatile biological activity, such as an anti-proliferative action. The derivatives were tested for the inhibition of the cytosolic, hCA I and II (off target isoforms) and the trans-membrane, tumor-associated hCA IX and XII enzymes (anticancer drug targets). Generally, hCA I was not effectively inhibited, whereas many low nanomolar inhibitors were evidenced against hCA II (KIs in the range of 0.42-90.1 nM), IX (KIs in the range of 0.72-63.6 nM), and XII (KIs in the range of 0.88-85.2 nM). The best substitution fragments at the pyrazoline ring included for CA II a 4-sulfamic group on the 3-aryl and halogens on the 5-aryl or a methoxy group on the 3-aryl and a 4-sulfamate group on the 5-aryl; for CA IX and CA XII they included the sulfamic group on the 3- or 4-position of the 5-aryl and an electronwithdrawing group on the 4-postion of the 3-aryl ring.
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Affiliation(s)
- Davide Moi
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, via Ospedale 72, Cagliari I, 09124, Italy
| | - Alessio Nocentini
- Department NEUROFARBA - Pharmaceutical and Nutraceutical Section, University of Firenze, via Ugo Schiff 6, I-50019, Sesto Fiorentino, Firenze, Italy
| | - Alessandro Deplano
- Pharmacelera, Placa Pau Vila, 1, Sector 1, Edificio Palau de Mar, Barcelona, 08039, Spain
| | - Gianfranco Balboni
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, via Ospedale 72, Cagliari I, 09124, Italy
| | - Claudiu T Supuran
- Department NEUROFARBA - Pharmaceutical and Nutraceutical Section, University of Firenze, via Ugo Schiff 6, I-50019, Sesto Fiorentino, Firenze, Italy.
| | - Valentina Onnis
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, via Ospedale 72, Cagliari I, 09124, Italy.
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Deplano A, Cipriano M, Moraca F, Novellino E, Catalanotti B, Fowler CJ, Onnis V. Benzylamides and piperazinoarylamides of ibuprofen as fatty acid amide hydrolase inhibitors. J Enzyme Inhib Med Chem 2019; 34:562-576. [PMID: 30688118 PMCID: PMC6352954 DOI: 10.1080/14756366.2018.1532418] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Fatty Acid Amide Hydrolase (FAAH) is a serine hydrolase that plays a key role in controlling endogenous levels of endocannabinoids. FAAH inhibition is considered a powerful approach to enhance the endocannabinoid signalling, and therefore it has been largely studied as a potential target for the treatment of neurological disorders such as anxiety or depression, or of inflammatory processes. We present two novel series of amide derivatives of ibuprofen designed as analogues of our reference FAAH inhibitor Ibu-AM5 to further explore its structure-activity relationships. In the new amides, the 2-methylpyridine moiety of Ibu-AM5 was substituted by benzylamino and piperazinoaryl moieties. The obtained benzylamides and piperazinoarylamides showed FAAH inhibition ranging from the low to high micromolar potency. The binding of the new amides in the active site of FAAH, estimated using the induced fit protocol, indicated arylpiperazinoamides binding the ACB channel and the cytosolic port, and benzylamides binding the ACB channel.
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Affiliation(s)
- Alessandro Deplano
- a Department of Life and Environmental Sciences - Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences , University of Cagliari , Cagliari , Italy
| | - Mariateresa Cipriano
- b Department of Pharmacology and Clinical Neuroscience , Umeå University , Umeå , Sweden
| | - Federica Moraca
- c Department of Chemical Sciences , University of Napoli Federico II , Napoli , Italy
| | - Ettore Novellino
- d Department of Pharmacy , University of Napoli Federico II , Napoli , Italy
| | - Bruno Catalanotti
- d Department of Pharmacy , University of Napoli Federico II , Napoli , Italy
| | - Christopher J Fowler
- b Department of Pharmacology and Clinical Neuroscience , Umeå University , Umeå , Sweden
| | - Valentina Onnis
- a Department of Life and Environmental Sciences - Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences , University of Cagliari , Cagliari , Italy
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Argudín MA, Youzaga S, Dodémont M, Heinrichs A, Roisin S, Deplano A, Nonhoff C, Hallin M. Detection of optrA-positive enterococci clinical isolates in Belgium. Eur J Clin Microbiol Infect Dis 2019; 38:985-987. [PMID: 30771123 DOI: 10.1007/s10096-019-03504-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Accepted: 02/04/2019] [Indexed: 12/20/2022]
Affiliation(s)
- M Angeles Argudín
- Department of Microbiology, Laboratoire Hospitalier Universitaire de Bruxelles (LHUB-ULB) Site Anderlecht, Hôpital Erasme-Cliniques universitaires de Bruxelles, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium.
| | - S Youzaga
- Department of Microbiology, Laboratoire Hospitalier Universitaire de Bruxelles (LHUB-ULB) Site Anderlecht, Hôpital Erasme-Cliniques universitaires de Bruxelles, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - M Dodémont
- Department of Microbiology, Laboratoire Hospitalier Universitaire de Bruxelles (LHUB-ULB) Site Anderlecht, Hôpital Erasme-Cliniques universitaires de Bruxelles, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - A Heinrichs
- Department of Microbiology, Laboratoire Hospitalier Universitaire de Bruxelles (LHUB-ULB) Site Anderlecht, Hôpital Erasme-Cliniques universitaires de Bruxelles, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - S Roisin
- Department of Microbiology, Laboratoire Hospitalier Universitaire de Bruxelles (LHUB-ULB) Site Anderlecht, Hôpital Erasme-Cliniques universitaires de Bruxelles, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - A Deplano
- Department of Microbiology, Laboratoire Hospitalier Universitaire de Bruxelles (LHUB-ULB) Site Anderlecht, Hôpital Erasme-Cliniques universitaires de Bruxelles, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - C Nonhoff
- Department of Microbiology, Laboratoire Hospitalier Universitaire de Bruxelles (LHUB-ULB) Site Anderlecht, Hôpital Erasme-Cliniques universitaires de Bruxelles, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - M Hallin
- Department of Microbiology, Laboratoire Hospitalier Universitaire de Bruxelles (LHUB-ULB) Site Anderlecht, Hôpital Erasme-Cliniques universitaires de Bruxelles, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
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Vázquez J, Deplano A, Herrero A, Ginex T, Gibert E, Rabal O, Oyarzabal J, Herrero E, Luque FJ. Development and Validation of Molecular Overlays Derived from Three-Dimensional Hydrophobic Similarity with PharmScreen. J Chem Inf Model 2018; 58:1596-1609. [PMID: 30010337 DOI: 10.1021/acs.jcim.8b00216] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular alignment is a standard procedure for three-dimensional (3D) similarity measurements and pharmacophore elucidation. This process is influenced by several factors, such as the physicochemical descriptors utilized to account for the molecular determinants of biological activity and the reference templates. Relying on the hypothesis that the maximal achievable binding affinity for a drug-like molecule is largely due to desolvation, we explore a novel strategy for 3D molecular overlays that exploits the partitioning of molecular hydrophobicity into atomic contributions in conjunction with information about the distribution of hydrogen-bond (HB) donor/acceptor groups. A brief description of the method, as implemented in the software package PharmScreen, including the derivation of the fractional hydrophobic contributions within the quantum mechanical version of the Miertus-Scrocco-Tomasi (MST) continuum model, and the procedure utilized for the optimal superposition between molecules, is presented. The computational procedure is calibrated by using a data set of 402 molecules pertaining to 14 distinct targets taken from the literature and validated against the AstraZeneca test, which comprises 121 experimentally derived sets of molecular overlays. The results point out the suitability of the MST-based hydrophobic parameters for generating molecular overlays, as correct predictions were obtained for 94%, 79%, and 54% of the molecules classified into easy, moderate, and hard sets, respectively. Moreover, the results point out that this accuracy is attained at a much lower degree of identity between the templates used by hydrophobic/HB fields and electrostatic/steric ones. These findings support the usefulness of the hydrophobic/HB descriptors to generate complementary overlays that may be valuable to rationalize structure-activity relationships and for virtual screening campaigns.
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Affiliation(s)
- Javier Vázquez
- Pharmacelera , Plaça Pau Vila, 1, Sector C 2a , Edifici Palau de Mar, Barcelona 08039 , Spain.,Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Sciences, Institute of Biomedicine (IBUB), and Institute of Theoretical and Computational Chemistry (IQTC-UB) , University of Barcelona , Av. Prat de la Riba 171 , Santa Coloma de Gramenet E-08921 , Spain
| | - Alessandro Deplano
- Pharmacelera , Plaça Pau Vila, 1, Sector C 2a , Edifici Palau de Mar, Barcelona 08039 , Spain
| | - Albert Herrero
- Pharmacelera , Plaça Pau Vila, 1, Sector C 2a , Edifici Palau de Mar, Barcelona 08039 , Spain
| | - Tiziana Ginex
- Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Sciences, Institute of Biomedicine (IBUB), and Institute of Theoretical and Computational Chemistry (IQTC-UB) , University of Barcelona , Av. Prat de la Riba 171 , Santa Coloma de Gramenet E-08921 , Spain
| | - Enric Gibert
- Pharmacelera , Plaça Pau Vila, 1, Sector C 2a , Edifici Palau de Mar, Barcelona 08039 , Spain
| | - Obdulia Rabal
- Small Molecule Discovery Platform, Molecular Therapeutics Program, Center for Applied Medical Research (CIMA) , University of Navarra , Avda. Pio XII 55 , Pamplona E-31008 , Spain
| | - Julen Oyarzabal
- Small Molecule Discovery Platform, Molecular Therapeutics Program, Center for Applied Medical Research (CIMA) , University of Navarra , Avda. Pio XII 55 , Pamplona E-31008 , Spain
| | - Enric Herrero
- Pharmacelera , Plaça Pau Vila, 1, Sector C 2a , Edifici Palau de Mar, Barcelona 08039 , Spain
| | - F Javier Luque
- Department of Nutrition, Food Science and Gastronomy, Faculty of Pharmacy and Food Sciences, Institute of Biomedicine (IBUB), and Institute of Theoretical and Computational Chemistry (IQTC-UB) , University of Barcelona , Av. Prat de la Riba 171 , Santa Coloma de Gramenet E-08921 , Spain
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13
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Argudín MA, Dodémont M, Taguemount M, Roisin S, de Mendonça R, Deplano A, Nonhoff C, Denis O. In vitro activity of ceftaroline against clinical Staphylococcus aureus isolates collected during a national survey conducted in Belgian hospitals. J Antimicrob Chemother 2018; 73:2001. [DOI: 10.1093/jac/dky140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Argudín MA, Deplano A, Vandendriessche S, Dodémont M, Nonhoff C, Denis O, Roisin S. CC398 Staphylococcus aureus subpopulations in Belgian patients. Eur J Clin Microbiol Infect Dis 2018; 37:911-916. [PMID: 29450768 DOI: 10.1007/s10096-018-3205-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 01/29/2018] [Indexed: 10/18/2022]
Abstract
Studies based on genome-wide single nucleotide polymorphisms (SNPs) supported the existence of two subpopulations in clonal complex (CC) 398 Staphylococcus aureus: an ancestral human-adapted clade (HC) and an animal-associated clade (AC). In this study, we have investigated the occurrence of genetic markers that allow discrimination of these subpopulations among CC398 isolates collected during 2014 to 2016 from human patients in Belgium. A collection of isolates was investigated by means of spa-typing and 16S-mecA-nuc PCR. CC398 isolates were classified as belonging to the human or the animal clade by using a canonical SNPs PCR and further studied by antimicrobial susceptibility and the presence of toxins, immune evasion cluster (IEC), and resistance genes. A total of 124 (7.8%) human isolates belonged to CC398. They were grouped into HC (n = 58) or AC (n = 66). The genes erm(T), pvl, chp, and scn were predominantly found in HC-CC398, while AC-CC398 isolates carried more frequently than the mecA, erm(C), tet(K), tet(M), and tet(L) genes. Different combinations of gene profiles were observed according to the clade. CC398 isolates from Belgian patients belonged to different subpopulations including typical HC and AC-isolates. Few HC-strains with mecA and AC-isolates harboring IEC were found. CC398 isolates from Belgian patients belonged to different subpopulations including typical HC and AC-isolates, as well as new emerging subpopulations that underline the ability of this lineage to acquire resistance and virulence genes. Further research is needed to evaluate the emergence of these subpopulations in the clinical setting.
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Affiliation(s)
- M Angeles Argudín
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium.
| | - A Deplano
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - S Vandendriessche
- Department of Laboratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - M Dodémont
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - C Nonhoff
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - O Denis
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium.,Ecole de Santé Publique, Université Libre de Bruxelles, Bruxelles, Belgium
| | - S Roisin
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
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Corona A, Onnis V, Deplano A, Bianco G, Demurtas M, Distinto S, Cheng YC, Alcaro S, Esposito F, Tramontano E. Design, synthesis and antiviral evaluation of novel heteroarylcarbothioamide derivatives as dual inhibitors of HIV-1 reverse transcriptase-associated RNase H and RDDP functions. Pathog Dis 2017; 75:3943645. [PMID: 28859311 PMCID: PMC6433301 DOI: 10.1093/femspd/ftx078] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 07/08/2017] [Indexed: 11/14/2022] Open
Abstract
In the continuous effort to identify new HIV-1 inhibitors endowed with innovative mechanisms, the dual inhibition of different viral functions would provide a significant advantage against drug-resistant variants. The HIV-1 reverse transcriptase (RT)-associated ribonuclease H (RNase H) is the only viral-encoded enzymatic activity that still lacks an efficient inhibitor. We synthesized a library of 3,5-diamino-N-aryl-1H-pyrazole-4-carbothioamide and 4-amino-5-benzoyl-N-phenyl-2-(substituted-amino)-1H-pyrrole-3-carbothioamide derivatives and tested them against RNase H activity. We identified the pyrazolecarbothioamide derivative A15, able to inhibit viral replication and both RNase H and RNA-dependent DNA polymerase (RDDP) RT-associated activities in the low micromolar range. Docking simulations hypothesized its binding to two RT pockets. Site-directed mutagenesis experiments showed that, with respect to wt RT, V108A substitution strongly reduced A15 IC50 values (12.6-fold for RNase H inhibition and 4.7-fold for RDDP), while substitution A502F caused a 9.0-fold increase in its IC50 value for RNase H, not affecting the RDDP inhibition, reinforcing the hypothesis of a dual-site inhibition. Moreover, A15 retained good inhibition potency against three non-nucleoside RT inhibitor (NNRTI)-resistant enzymes, confirming a mode of action unrelated to NNRTIs and suggesting its potential as a lead compound for development of new HIV-1 RT dual inhibitors active against drug-resistant viruses.
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Affiliation(s)
- Angela Corona
- Dipartimento di Scienze della Vita e dell’Ambiente, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato (Cagliari), Italy
| | - Valentina Onnis
- Dipartimento di Scienze della Vita e dell’Ambiente, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato (Cagliari), Italy
| | - Alessandro Deplano
- Dipartimento di Scienze della Vita e dell’Ambiente, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato (Cagliari), Italy
| | - Giulia Bianco
- Dipartimento di Scienze della Vita e dell’Ambiente, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato (Cagliari), Italy
| | - Monica Demurtas
- Dipartimento di Scienze della Vita e dell’Ambiente, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato (Cagliari), Italy
| | - Simona Distinto
- Dipartimento di Scienze della Vita e dell’Ambiente, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato (Cagliari), Italy
| | - Yung-Chi Cheng
- Department of Pharmacology, Yale University Medical School, New Haven, CT 06520, USA
| | - Stefano Alcaro
- Dipartimento di Scienze della Salute, Università “Magna Græcia” di Catanzaro, Campus “S. Venuta”, Viale Europa, 88100 Catanzaro, Italy
| | - Francesca Esposito
- Dipartimento di Scienze della Vita e dell’Ambiente, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato (Cagliari), Italy
| | - Enzo Tramontano
- Dipartimento di Scienze della Vita e dell’Ambiente, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato (Cagliari), Italy
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Deplano A, Morgillo CM, Demurtas M, Björklund E, Cipriano M, Svensson M, Hashemian S, Smaldone G, Pedone E, Luque FJ, Cabiddu MG, Novellino E, Fowler CJ, Catalanotti B, Onnis V. Novel propanamides as fatty acid amide hydrolase inhibitors. Eur J Med Chem 2017; 136:523-542. [PMID: 28535469 DOI: 10.1016/j.ejmech.2017.05.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 05/02/2017] [Accepted: 05/11/2017] [Indexed: 11/29/2022]
Abstract
Fatty acid amide hydrolase (FAAH) has a key role in the control of the cannabinoid signaling, through the hydrolysis of the endocannabinoids anandamide and in some tissues 2-arachidonoylglycerol. FAAH inhibition represents a promising strategy to activate the cannabinoid system, since it does not result in the psychotropic and peripheral side effects characterizing the agonists of the cannabinoid receptors. Here we present the discovery of a novel class of profen derivatives, the N-(heteroaryl)-2-(4-((2-(trifluoromethyl)pyridin-4-yl)amino)phenyl)propanamides, as FAAH inhibitors. Enzymatic assays showed potencies toward FAAH ranging from nanomolar to micromolar range, and the most compounds lack activity toward the two isoforms of cyclooxygenase. Extensive structure-activity studies and the definition of the binding mode for the lead compound of the series are also presented. Kinetic assays in rat and mouse FAAH on selected compounds of the series demonstrated that slight modifications of the chemical structure could influence the binding mode and give rise to competitive (TPA1) or non-competitive (TPA14) inhibition modes.
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Affiliation(s)
- Alessandro Deplano
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, via Ospedale 72, Cagliari I-09124, Italy
| | | | - Monica Demurtas
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, via Ospedale 72, Cagliari I-09124, Italy
| | - Emmelie Björklund
- Department of Pharmacology and Clinical Neuroscience, Umeå University, SE-901 87 Umeå, Sweden
| | - Mariateresa Cipriano
- Department of Pharmacology and Clinical Neuroscience, Umeå University, SE-901 87 Umeå, Sweden
| | - Mona Svensson
- Department of Pharmacology and Clinical Neuroscience, Umeå University, SE-901 87 Umeå, Sweden
| | - Sanaz Hashemian
- Department of Pharmacology and Clinical Neuroscience, Umeå University, SE-901 87 Umeå, Sweden
| | | | - Emilia Pedone
- Institute of Biostructures and Bioimaging, CNR, Naples, Italy
| | - F Javier Luque
- Departament de Nutrició, Ciències de l'Alimentació i Gastronomia and Institut de Biomedicina (IBUB), Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Santa Coloma de Gramenet, Spain
| | - Maria G Cabiddu
- Department of Chemical and Geological Sciences, University of Cagliari, Italy
| | - Ettore Novellino
- Department of Pharmacy, Università Degli Studi di Napoli Federico II, Napoli, Italy
| | - Christopher J Fowler
- Department of Pharmacology and Clinical Neuroscience, Umeå University, SE-901 87 Umeå, Sweden
| | - Bruno Catalanotti
- Department of Pharmacy, Università Degli Studi di Napoli Federico II, Napoli, Italy.
| | - Valentina Onnis
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, via Ospedale 72, Cagliari I-09124, Italy
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Vandendriessche S, De Boeck H, Deplano A, Phoba MF, Lunguya O, Falay D, Dauly N, Verhaegen J, Denis O, Jacobs J. Characterisation of Staphylococcus aureus isolates from bloodstream infections, Democratic Republic of the Congo. Eur J Clin Microbiol Infect Dis 2017; 36:1163-1171. [PMID: 28116552 DOI: 10.1007/s10096-017-2904-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 01/09/2017] [Indexed: 01/12/2023]
Abstract
Staphylococcus aureus is known worldwide as an invasive pathogen, but information on S. aureus from bloodstream infections in Central Africa remains scarce. A collection of S. aureus blood culture isolates recovered from hospitals in four provinces in the Democratic Republic of the Congo (2009-2013) was assessed. A total of 27/108 isolates were methicillin-resistant S. aureus (MRSA), of which >70% were co-resistant to aminoglycosides, tetracyclines, macrolides and lincosamides. For MRSA and methicillin-susceptible S. aureus (MSSA) isolates, resistance to chloramphenicol and trimethoprim-sulphamethoxazole (TMP-SMX) was <10%. However, 66.7% (72/108) of all isolates harboured the trimethoprim resistance gene dfrG. More than three-quarters (84/108, 77.8%) of isolates belonged to CC5, CC8, CC121 or CC152. Genetic diversity was higher among MSSA (31 spa types) compared to MRSA (four spa types). Most MRSA (23/27, 85.2%) belonged to CC8-spa t1476-SCCmec V and 17/23 (73.9%) MRSA ST8 were oxacillin susceptible but cefoxitin resistant. Among MRSA and MSSA combined, 49.1% (53/108) and 19.4% (21/108) contained the genes encoding for Panton-Valentine leucocidin (lukS-lukF PV, PVL) and toxic shock syndrome toxin-1 (tst, TSST-1), respectively. PVL was mainly detected among MSSA (51/53 isolates harbouring PVL were MSSA, 96.2%) and associated with CC121, CC152, CC1 and CC5. TSST-1 was associated with CC8-spa t1476-SCCmec V. The immune evasion cluster (IEC) genes scn, sak and chp were detected in 81.5% of isolates (88/108, equally represented among MSSA and MRSA). The present study confirms the occurrence of MRSA with high levels of multidrug co-resistance and PVL-positive MSSA among invasive S. aureus isolates in Central Africa.
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Affiliation(s)
- S Vandendriessche
- National Reference Centre for Staphylococcus aureus, Laboratory of Microbiology, Université Libre de Bruxelles (ULB), Brussels, Belgium.
- Department of Laboratory Medicine, Ghent University Hospital, Ghent, Belgium.
| | - H De Boeck
- Department of Clinical Sciences, Institute of Tropical Medicine (ITM), Antwerp, Belgium
| | - A Deplano
- National Reference Centre for Staphylococcus aureus, Laboratory of Microbiology, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - M-F Phoba
- Department of Clinical Sciences, Institute of Tropical Medicine (ITM), Antwerp, Belgium
| | - O Lunguya
- Department of Clinical Microbiology, National Institute for Biomedical Research Department of Microbiology, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
- Department of Microbiology, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - D Falay
- Department of Pediatrics, University Hospital of Kisangani, Kisangani, Democratic Republic of the Congo
| | - N Dauly
- Department of Clinical Microbiology, National Institute for Biomedical Research Department of Microbiology, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
- Department of Microbiology, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - J Verhaegen
- Department of Microbiology and Immunology, KU Leuven, Leuven, Belgium
| | - O Denis
- National Reference Centre for Staphylococcus aureus, Laboratory of Microbiology, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - J Jacobs
- Department of Clinical Sciences, Institute of Tropical Medicine (ITM), Antwerp, Belgium
- Department of Microbiology and Immunology, KU Leuven, Leuven, Belgium
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Argudín MA, Dodémont M, Taguemount M, Roisin S, de Mendonça R, Deplano A, Nonhoff C, Denis O. In vitro activity of ceftaroline against clinical Staphylococcus aureus isolates collected during a national survey conducted in Belgian hospitals. J Antimicrob Chemother 2017; 72:56-59. [PMID: 27634917 DOI: 10.1093/jac/dkw380] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 07/27/2016] [Accepted: 08/12/2016] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES The aim of this study was to estimate the in vitro activity of ceftaroline against clinical Staphylococcus aureus isolates collected during national surveillance in Belgian acute-care hospitals. Ceftaroline-resistant isolates were further investigated for their resistance mechanisms. METHODS From October 2013 to March 2014, 155 laboratories of Belgian acute-care hospitals were invited to send to the National Reference Centre-Staphylococcus aureus (Belgium) up to five non-duplicate S. aureus including three MRSA and two MSSA from hospitalized patients. Isolates were analysed by spa typing, SCCmec typing (for MRSA) and PCR for detection of 16S-mecA-nuc and 16S-mecC. MICs of oxacillin, cefoxitin and ceftaroline were determined by the broth microdilution method. The nucleotide sequences of mecA, native pbp and gdpP genes of isolates with reduced susceptibility to ceftaroline were analysed for the presence of mutations responsible for amino acid substitutions. RESULTS Ninety-nine percent of isolates, including MRSA (n = 284) and MSSA (n = 131), were susceptible to ceftaroline. Only four MRSA isolates showed resistance to ceftaroline (MIC = 2 mg/L). These four isolates belonged to lineages CC5 (n = 1), CC22 (n = 2) and CC8 (n = 1). Two isolates (CC22 and CC8) carried mutations in mecA, as well as in other pbp genes. The remaining isolates carried mutations in native pbp genes or in gdpP. CONCLUSIONS This is the first Belgian in vitro survey on ceftaroline activity against S. aureus. This antibiotic showed excellent activity against MRSA and MSSA, and only a few MRSA isolates with resistance were found. Reduced susceptibility to ceftaroline seems a complex phenomenon due to the accumulation of mutations in genes involved in β-lactam tolerance.
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Affiliation(s)
- M Angeles Argudín
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - M Dodémont
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - M Taguemount
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - S Roisin
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - R de Mendonça
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - A Deplano
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - C Nonhoff
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
| | - O Denis
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070 Brussels, Belgium
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Costanzi S, Skorski M, Deplano A, Habermehl B, Mendoza M, Wang K, Biederman M, Dawson J, Gao J. Homology modeling of a Class A GPCR in the inactive conformation: A quantitative analysis of the correlation between model/template sequence identity and model accuracy. J Mol Graph Model 2016; 70:140-152. [PMID: 27723562 DOI: 10.1016/j.jmgm.2016.10.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/12/2016] [Accepted: 10/03/2016] [Indexed: 01/22/2023]
Abstract
With the present work we quantitatively studied the modellability of the inactive state of Class A G protein-coupled receptors (GPCRs). Specifically, we constructed models of one of the Class A GPCRs for which structures solved in the inactive state are available, namely the β2 AR, using as templates each of the other class members for which structures solved in the inactive state are also available. Our results showed a detectable linear correlation between model accuracy and model/template sequence identity. This suggests that the likely accuracy of the homology models that can be built for a given receptor can be generally forecasted on the basis of the available templates. We also probed whether sequence alignments that allow for the presence of gaps within the transmembrane domains to account for structural irregularities afford better models than the classical alignment procedures that do not allow for the presence of gaps within such domains. As our results indicated, although the overall differences are very subtle, the inclusion of internal gaps within the transmembrane domains has a noticeable a beneficial effect on the local structural accuracy of the domain in question.
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Affiliation(s)
- Stefano Costanzi
- Department of Chemistry, American University, Washington, DC 20016, USA; Center for Behavioral Neuroscience, American University, Washington, DC 20016, USA.
| | - Matthew Skorski
- Department of Chemistry, American University, Washington, DC 20016, USA
| | | | - Brett Habermehl
- Department of Chemistry, American University, Washington, DC 20016, USA
| | - Mary Mendoza
- Department of Chemistry, American University, Washington, DC 20016, USA
| | - Keyun Wang
- Department of Chemistry, American University, Washington, DC 20016, USA
| | | | - Jessica Dawson
- Department of Chemistry, American University, Washington, DC 20016, USA
| | - Jia Gao
- Department of Chemistry, American University, Washington, DC 20016, USA
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Eloh K, Demurtas M, Mura MG, Deplano A, Onnis V, Sasanelli N, Maxia A, Caboni P. Potent Nematicidal Activity of Maleimide Derivatives on Meloidogyne incognita. J Agric Food Chem 2016; 64:4876-4881. [PMID: 27249054 DOI: 10.1021/acs.jafc.6b02250] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Different maleimide derivatives were synthesized and assayed for their in vitro activity on the soil inhabiting, plant-parasitic nematode Meloidogyne incognita, also known as root-knot nematode. The compounds maleimide, N-ethylmaleimide, N-isopropylmaleimide, and N-isobutylmaleimide showed the strongest nematicidal activity on the second stage juveniles of the root-knot nematode with EC50/72h values of 2.6 ± 1.3, 5.1 ± 3.4, 16.2 ± 5.4, and 19.0 ± 9.0 mg/L, respectively. We also determined the nematicidal activity of copper sulfate, finding an EC50 value of 48.6 ± 29.8 mg/L. When maleimide at 1 mg/L was tested in combination with copper sulfate at 50 mg/L, we observed 100% mortality of the nematodes. We performed a GC-MS metabolomics analysis after treating nematodes with maleimide at 8 mg/L for 24 h. This analysis revealed altered fatty acids and diglyceride metabolites such as oleic acid, palmitic acid, and 1-monopalmitin. Our results suggest that maleimide may be used as a new interesting building block for developing new nematicides in combination with copper salts.
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Affiliation(s)
- Kodjo Eloh
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Monica Demurtas
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Manuel Giacomo Mura
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Alessandro Deplano
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Valentina Onnis
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Nicola Sasanelli
- Institute for Sustainable Plant Protection, CNR , via G. Amendola 122/D, 70126 Bari, Italy
| | - Andrea Maxia
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Pierluigi Caboni
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
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Argudín MA, Dodémont M, Vandendriessche S, Rottiers S, Tribes C, Roisin S, de Mendonça R, Nonhoff C, Deplano A, Denis O. Low occurrence of the new species Staphylococcus argenteus in a Staphylococcus aureus collection of human isolates from Belgium. Eur J Clin Microbiol Infect Dis 2016; 35:1017-22. [PMID: 27044019 DOI: 10.1007/s10096-016-2632-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 03/18/2016] [Indexed: 02/02/2023]
Abstract
Staphylococcus argenteus is a novel Staphylococcus species closely related to Staphylococcus aureus that has been recently described. In this study, we investigated the proportion and the characteristics of S. argenteus recovered from humans in Belgium. S. aureus. human isolates collected in Belgium from 2006 to 2015 (n = 1,903) were retrospectively characterised via the presence of non-pigmented colonies on chocolate agar, spa typing and rpoB sequencing to determine if some of them were in fact S. argenteus. Out of 73 strains non-pigmented on chocolate plates, 3 isolates (0.16 %) showed rpoB sequences, in addition to spa and sequence types (ST2250/t5787, ST2250/t6675, ST3240/t6675), related to S. argenteus. Two of them were methicillin-resistant, harbouring a SCCmec type IV. The three S. argenteus isolates carried genes (sak, scn) of the immune evasion cluster. This first Belgian nationwide analysis showed a low occurrence of S. argenteus. Further studies should be conducted to identify the distribution range and the clinical impact of this new species.
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Affiliation(s)
- M A Argudín
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium.
| | - M Dodémont
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - S Vandendriessche
- Department of Laboratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - S Rottiers
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - C Tribes
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - S Roisin
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - R de Mendonça
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - C Nonhoff
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - A Deplano
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
| | - O Denis
- National Reference Centre-Staphylococcus aureus, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Route de Lennik 808, 1070, Brussels, Belgium
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22
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Eloh K, Demurtas M, Deplano A, Ngoutane Mfopa A, Murgia A, Maxia A, Onnis V, Caboni P. In vitro nematicidal activity of aryl hydrazones and comparative GC-MS metabolomics analysis. J Agric Food Chem 2015; 63:9970-9976. [PMID: 26528945 DOI: 10.1021/acs.jafc.5b04815] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A series of aryl hydrazones were synthesized and in vitro assayed for their activity on the root-knot nematode Meloidogyne incognita. The phenylhydrazones of thiophene-2-carboxyaldehyde 5, 3-methyl-2-thiophenecarboxyaldehyde, 6, and salicylaldehyde, 2, were the most potent with EC50/48h values of 16.6 ± 2.2, 23.2 ± 2.7, and 24.3 ± 1.4 mg/L, respectively. A GC-MS metabolomics analysis, after in vitro nematode treatment with hydrazone 6 at 100 mg/L for 12 h, revealed elevated levels of fatty acids such as lauric acid, stearic acid, 2-octenoic acid, and palmitic acid. Whereas control samples showed the highest levels of monoacylglycerols such as monostearin and 2-monostearin, surprisingly, 2 h after treatment with hydrazone 6, nematodes excreted 3 times the levels of ammonia eliminated in the same conditions by controls. Thus, phenylhydrazones may represent a good scaffold in the discovery and synthesis of new nematicidal compounds, and a metabolomics approach may be helpful in understanding their mechanisms of toxicity and mode of action.
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Affiliation(s)
- Kodjo Eloh
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Monica Demurtas
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Alessandro Deplano
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Alvine Ngoutane Mfopa
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Antonio Murgia
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Andrea Maxia
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Valentina Onnis
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
| | - Pierluigi Caboni
- Department of Life and Environmental Sciences, University of Cagliari , via Ospedale 72, 09124 Cagliari, Italy
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23
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Congiu C, Onnis V, Deplano A, Balboni G, Ceruso M, Supuran CT. Synthesis and carbonic anhydrase I, II, IX and XII inhibitory activity of sulfamates incorporating piperazinyl-ureido moieties. Bioorg Med Chem 2015; 23:5619-25. [DOI: 10.1016/j.bmc.2015.07.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 07/13/2015] [Accepted: 07/14/2015] [Indexed: 11/28/2022]
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Congiu C, Onnis V, Deplano A, Balboni G, Dedeoglu N, Supuran CT. Synthesis of sulfonamides incorporating piperazinyl-ureido moieties and their carbonic anhydrase I, II, IX and XII inhibitory activity. Bioorg Med Chem Lett 2015; 25:3850-3. [PMID: 26233435 DOI: 10.1016/j.bmcl.2015.07.060] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 07/17/2015] [Accepted: 07/18/2015] [Indexed: 01/15/2023]
Abstract
By using SLC-0111 (4-fluorophenylureido-benzenesulfonamide), a sulfonamide carbonic anhydrase (CA, EC 4.2.1.1) inhibitor in Phase I clinical trials as an antitumor agent as lead molecule, a series of benzenesulfonamide derivatives incorporating ureido moieties was synthesized. The new compounds contain a 4-N-substituted piperazine fragment in which the ureido linker has been included, and were tested as inhibitors of the cytosolic human (h) hCA I and II isoforms, as well as the transmembrane, tumor-associated enzymes hCA IX and XII. Depending on the substitution pattern at the piperazine ring, low nanomolar inhibitors were detected against all four isoforms, making the new class of sulfonamides of interest for various pharmacologic applications.
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Affiliation(s)
- Cenzo Congiu
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Via Ospedale 72, Cagliari I-09124, Italy.
| | - Valentina Onnis
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Via Ospedale 72, Cagliari I-09124, Italy
| | - Alessandro Deplano
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Via Ospedale 72, Cagliari I-09124, Italy
| | - Gianfranco Balboni
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Via Ospedale 72, Cagliari I-09124, Italy
| | - Nurcan Dedeoglu
- Università degli Studi di Firenze, Polo Scientifico, Laboratorio di Chimica Bioinorganica, Rm. 188, Via della Lastruccia 3, 50019 Sesto Fiorentino (Florence), Italy
| | - Claudiu T Supuran
- Università degli Studi di Firenze, Polo Scientifico, Laboratorio di Chimica Bioinorganica, Rm. 188, Via della Lastruccia 3, 50019 Sesto Fiorentino (Florence), Italy; Università degli Studi di Firenze, NEUROFARBA Department, Section of Pharmaceutical and Nutraceutical Chemistry, Via Ugo Schiff 6, 50019 Sesto Fiorentino (Florence), Italy.
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25
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Jans B, D Huang TD, Bauraing C, Berhin C, Bogaerts P, Deplano A, Denis O, Catry B, Glupczynski Y. Infection due to travel-related carbapenemase-producing Enterobacteriaceae, a largely underestimated phenomenon in Belgium. Acta Clin Belg 2015; 70:181-7. [PMID: 25825036 DOI: 10.1179/2295333715y.0000000001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Carbapenemase-producing Enterobacteriaceae (CPE) are emerging worldwide, representing a major threat for public health. Early CPE detection is crucial in order to prevent infections and the development of reservoirs/outbreaks in hospitals. In 2008, most of the CPE strains reported in Belgium were imported from patients repatriated from abroad. Actually, this is no longer the case. OBJECTIVES AND METHODS A surveillance was set up in Belgian hospitals (2012) in order to explore the epidemiology and determinants of CPE, including the link with international travel/hospitalization. The present article describes travel-related CPE reported in Belgium. Different other potential sources for importation of CPE are discussed. RESULTS Only 12% of all CPE cases reported in Belgium (2012-2013) were travel related (with/without hospitalization). This is undoubtedly an underestimation (missing travel data: 36%), considering the increasing tourism, the immigration from endemic countries, the growing number of foreign patients using scheduled medical care in Belgium, and the medical repatriations from foreign hospitals. The free movement of persons and services (European Union) contributes to an increase in foreign healthcare workers (HCW) in Belgian hospitals. Residents from nursing homes located at the country borders can be another potential source of dissemination of CPE between countries. Moreover, the high population density in Belgium can increase the risk for CPE-dissemination. Urban areas in Belgium may cumulate these potential risk factors for import/dissemination of CPE. CONCLUSIONS Ideally, travel history data should be obtained from hospital hygiene teams, not from the microbiological laboratory. Patients who received medical care abroad (whatever the country) should be screened for CPE at admission.
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26
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Congiu C, Onnis V, Deplano A, Salvadori S, Marconi V, Maftei D, Negri L, Lattanzi R, Balboni G. A new convenient synthetic method and preliminary pharmacological characterization of triazinediones as prokineticin receptor antagonists. Eur J Med Chem 2014; 81:334-40. [PMID: 24852280 DOI: 10.1016/j.ejmech.2014.05.030] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 05/09/2014] [Accepted: 05/10/2014] [Indexed: 11/15/2022]
Abstract
A new efficient synthetic method to obtain prokineticin receptor antagonists based on the triazinedione scaffold is described. In this procedure the overall yield improves from 13% to about 54%, essentially for two factors: 1) N-(chlorocarbonyl) isocyanate is no more used, it represents the yield limiting step with an average yield not exceeding 30%. 2) The Mitsunobu reaction is not involved in the new synthetic scheme avoiding the use of time and solvent consuming column chromatography. All synthesized triazinediones were preliminary pharmacologically screened in vivo for their ability to reduce the Bv8-induced thermal hyperalgesia. In this assay all compounds displayed EC50 values in the picomolar-subpicomolar range, some triazinediones containing a 4-halogen substituted benzyl group in position 5 showed the best activity. The analogues containing a 4-fluorine atom (PC-7) and a 4-bromobenzyl group (PC-25) resulted 10 times more potent than the reference PC-1 that bears a 4-ethylbenzyl group. While the 4-trifluoromethylbenzyl substituted analog (PC-27) was 100 times more potent as compared to PC1.
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Affiliation(s)
- Cenzo Congiu
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, I-09124 Cagliari, Italy
| | - Valentina Onnis
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, I-09124 Cagliari, Italy.
| | - Alessandro Deplano
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, I-09124 Cagliari, Italy
| | - Severo Salvadori
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, I-44100 Ferrara, Italy
| | - Veronica Marconi
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, I-00185 Rome, Italy
| | - Daniela Maftei
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, I-00185 Rome, Italy
| | - Lucia Negri
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, I-00185 Rome, Italy
| | - Roberta Lattanzi
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, I-00185 Rome, Italy
| | - Gianfranco Balboni
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, I-09124 Cagliari, Italy.
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Liesse Iyamba JM, Seil M, Nagant C, Dulanto S, Deplano A, El Khattabi C, Takaisi Kikuni NB, Dehaye JP. Inhibition by EGTA of the formation of a biofilm by clinical strains of Staphylococcus aureus. J Basic Microbiol 2013; 54:700-10. [PMID: 23712617 DOI: 10.1002/jobm.201200511] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2012] [Accepted: 01/19/2013] [Indexed: 11/08/2022]
Abstract
The effect of EGTA on the adhesion and on the formation of a biofilm by two reference and eight clinical strains of Staphylococcus aureus was studied. All the clinical strains were isolated from patients from Kinshasa. Spa typing confirmed that these clinical strains were distinct. The Biofilm Ring Test (BFRT®) showed that EGTA (100 µM-10 mM) inhibited the adhesion of the four clinical methicillin-resistant (MRSA) strains and the crystal violet staining method that it inhibited the formation of a biofilm by all the strains. Divalent cations abolished the effect of EGTA on the formation of a biofilm, specially in the clinical MRSA strains. EGTA had no effect on established biofilms. Only concentrations of EGTA higher than 10 mM were toxic to eukaryotic cells. Our results establish the effectiveness and the safety of lock solutions with EGTA to prevent the formation in vitro of biofilms by S. aureus.
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Affiliation(s)
- J M Liesse Iyamba
- Laboratoire de Chimie Biologique et Médicale et de Microbiologie Pharmaceutique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium; Laboratoire de Microbiologie Expérimentale et Pharmaceutique, Faculté des Sciences Pharmaceutiques, Université de Kinshasa, Kinshasa, Democratic Republic of Congo
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Verroken A, Bauraing C, Deplano A, Bogaerts P, Huang D, Wauters G, Glupczynski Y. Epidemiological investigation of a nosocomial outbreak of multidrug-resistant Corynebacterium striatum at one Belgian university hospital. Clin Microbiol Infect 2013; 20:44-50. [PMID: 23586637 DOI: 10.1111/1469-0691.12197] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 02/17/2013] [Accepted: 02/18/2013] [Indexed: 12/01/2022]
Abstract
During an 8-month period, 24 Corynebacterium striatum isolates recovered from lower respiratory tract specimens of 10 hospitalized patients were characterized. The organisms were identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and by 16S rRNA gene sequencing. The cluster of C. striatum exclusively affected patients who had been admitted to an intensive care unit and/or subsequently transferred to one medium-size respiratory care unit. Prolonged duration of hospitalization, advanced stage of chronic obstructive pulmonary disease, recent administration of antibiotics and exposure to an invasive diagnostic procedure were the most commonly found risk factors in these patients. Seven patients were colonized and three infected. All strains displayed a similar broad spectrum resistance to antimicrobial agents, remaining susceptible to vancomycin only. Typing analysis by MALDI-TOF MS and by semi-automated repetitive sequence-based PCR (DiversiLab typing) showed that all outbreak-associated C. striatum isolates clustered together in one single type while they differed markedly from epidemiologically unrelated C. striatum isolates. Pulsed-field gel electrophoresis (PFGE) profiles revealed three distinct PFGE types among the C. striatum isolates associated with the outbreak while all external strains except one belonged to a distinct type. We conclude that C. striatum is an opportunistic nosocomial pathogen in long-term hospitalized patients and can be at the origin of major outbreaks. The routine use of MALDI-TOF MS greatly facilitated the recognition/identification of this organism in clinical samples and this technique could also offer the potential to be used as an easy and rapid epidemiological typing tool for outbreak investigation.
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Affiliation(s)
- A Verroken
- Department of Clinical Microbiology, UCL Saint-Luc University Hospital, Brussels, Belgium
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Blumental S, Deplano A, Jourdain S, De Mendonça R, Hallin M, Nonhoff C, Rottiers S, Vergison A, Denis O. Dynamic pattern and genotypic diversity of Staphylococcus aureus nasopharyngeal carriage in healthy pre-school children. J Antimicrob Chemother 2013; 68:1517-23. [PMID: 23515249 DOI: 10.1093/jac/dkt080] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES It is common wisdom that persistent carriage of Staphylococcus aureus is more frequent in young children than in adults. The objectives of this study were to assess the S. aureus temporal carriage pattern among a healthy community of pre-school children, with concomitant description of genotype diversity, toxin-encoding genes and antibiotic resistance. METHODS Among 333 children 3-6 years of age, S. aureus nasopharyngeal carriage was assessed over one school year by culture of three sequential nasopharyngeal aspirates. Identification, methicillin resistance and toxin production profile were determined by PCR. Genotyping was performed by spa sequencing and multilocus sequence typing (MLST). RESULTS Out of 830 samples collected, 286 (34%) yielded S. aureus from 185 carriers (55%). Based on consecutive genotype analysis, only 40/268 (15%) children could be classified as persistent carriers, and the remaining 118 (44%) showed intermittent carriage. spa typing revealed 82 types clustered into 13 spa clonal complexes (CCs). Fourteen strains isolated from 11 (3%) children were methicillin-resistant S. aureus (MRSA), half of these strains belonged to the commonly hospital-associated spa t008-ST8-SCCmec IV. Methicillin-susceptible S. aureus (MSSA) were genotypically more diverse. Toxic shock syndrome toxin and egc1/2 complexes were highly prevalent (24%). Contrastingly, Panton-Valentine leucocidin (PVL) was carried only by three MSSA strains (0.6% of children). Exfoliative toxins were detected in 10 (3.5%) MSSA strains, of which 5 were related to the impetigo clone CC121. CONCLUSIONS Although S. aureus nasopharyngeal carriage was high among healthy pre-school children, persistent carriage seems to be less frequent than previously reported. The prevalence of MRSA carriage was 3%, but was not associated with PVL.
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Affiliation(s)
- S Blumental
- Paediatric Infectious Diseases Department, Hôpital Universitaire des Enfants Reine Fabiola, Brussels, Belgium.
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30
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Vekens E, Soetens O, De Mendonça R, Echahidi F, Roisin S, Deplano A, Eeckhout L, Achtergael W, Piérard D, Denis O, Wybo I. Sequence-based typing of Legionella pneumophila serogroup 1 clinical isolates from Belgium between 2000 and 2010. Euro Surveill 2012. [DOI: 10.2807/ese.17.43.20302-en] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Sequence-based typing (SBT) is a discriminatory method widely used to genotype Legionella pneumophila strains. A total of 86 clinical L. pneumophila serogroup 1 (sg1) isolates, collected between January 2000 and December 2010 in the two Belgian National Reference Centres for Legionella pneumophila, were genotyped using the internationally standardised SBT protocol of the European Working Group for Legionella Infections (EWGLI). The isolates could be classified into 31 different sequence types (ST, index of diversity: 0.879). The obtained STs were submitted to the EWGLI SBT-database for L. pneumophila. In our study, ST47 (27.9%) and ST1 (19.8%) were the most frequently detected STs. The detected profiles were a combination of both frequently isolated and unique STs, and of both worldwide distributed and more local strains. Two STs, ST880 and ST881, were new to the EWGLI database. In conclusion, we characterised L. pneumophila sg1 isolates with the SBT method, and created a Belgian profile database that will be useful for future epidemiological studies.
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Affiliation(s)
- E Vekens
- National Reference Centre for Legionella pneumophila, Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - O Soetens
- National Reference Centre for Legionella pneumophila, Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - R De Mendonça
- National Reference Centre for Legionella pneumophila, Department of Microbiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - F Echahidi
- National Reference Centre for Legionella pneumophila, Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - S Roisin
- National Reference Centre for Legionella pneumophila, Department of Microbiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - A Deplano
- National Reference Centre for Legionella pneumophila, Department of Microbiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - L Eeckhout
- National Reference Centre for Legionella pneumophila, Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - W Achtergael
- National Reference Centre for Legionella pneumophila, Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - D Piérard
- National Reference Centre for Legionella pneumophila, Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - O Denis
- National Reference Centre for Legionella pneumophila, Department of Microbiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium
| | - I Wybo
- National Reference Centre for Legionella pneumophila, Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
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Vekens E, Soetens O, De Mendonça R, Echahidi F, Roisin S, Deplano A, Eeckhout L, Achtergael W, Piérard D, Denis O, Wybo I. Sequence-based typing of Legionella pneumophila serogroup 1 clinical isolates from Belgium between 2000 and 2010. Euro Surveill 2012; 17:20302. [PMID: 23137466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
Sequence-based typing (SBT) is a discriminatory method widely used to genotype Legionella pneumophila strains. A total of 86 clinical L. pneumophila serogroup 1 (sg1) isolates, collected between January 2000 and December 2010 in the two Belgian National Reference Centres for Legionella pneumophila, were genotyped using the internationally standardised SBT protocol of the European Working Group for Legionella Infections (EWGLI). The isolates could be classified into 31 different sequence types (ST, index of diversity: 0.879). The obtained STs were submitted to the EWGLI SBT-database for L. pneumophila. In our study, ST47 (27.9%) and ST1 (19.8%) were the most frequently detected STs. The detected profiles were a combination of both frequently isolated and unique STs, and of both worldwide distributed and more local strains. Two STs, ST880 and ST881, were new to the EWGLI database. In conclusion, we characterised L. pneumophila sg1 isolates with the SBT method, and created a Belgian profile database that will be useful for future epidemiological studies.
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Affiliation(s)
- E Vekens
- National Reference Centre for Legionella pneumophila, Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium.
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Vergison A, Machado AN, Deplano A, Doyen M, Brauner J, Nonhoff C, de Mendonça R, Mascart G, Denis O. Heterogeneity of disease and clones of community-onset methicillin-resistant Staphylococcus aureus in children attending a paediatric hospital in Belgium. Clin Microbiol Infect 2012; 18:769-77. [DOI: 10.1111/j.1469-0691.2011.03637.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Vlieghe E, Phe T, Hallin M, Denis O, Deplano A, De Smet B, Veng C, Kham C, Lynen L, Peetermans W, Jacobs J. Staphylococcus aureus blood stream infections in Cambodian adults. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Vandendriessche S, Hallin M, Catry B, Jans B, Deplano A, Nonhoff C, Roisin S, Mendonça R, Struelens MJ, Denis O. Previous healthcare exposure is the main antecedent for methicillin-resistant Staphylococcus aureus carriage on hospital admission in Belgium. Eur J Clin Microbiol Infect Dis 2012; 31:2283-92. [DOI: 10.1007/s10096-012-1567-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Accepted: 01/24/2012] [Indexed: 10/28/2022]
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Bogaerts P, Rezende de Castro R, Roisin S, Deplano A, Huang TD, Hallin M, Denis O, Glupczynski Y. Emergence of NDM-1-producing Acinetobacter baumannii in Belgium. J Antimicrob Chemother 2012; 67:1552-3. [DOI: 10.1093/jac/dks041] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Huang TD, Bogaerts P, Berhin C, Jans B, Deplano A, Denis O, Glupczynski Y. Rapid emergence of carbapenemase-producing Enterobacteriaceae isolates in Belgium. Euro Surveill 2011; 16. [DOI: 10.2807/ese.16.26.19900-en] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We report on the evolution and epidemiology of carbapenem non-susceptible Enterobacteriaceae (CNSE) including carbapenemase-producing Enterobacteriaceae (CPE) in Belgium between January 2007 and April 2011. Significantly higher numbers of CNSE and of CPE were detected in 2010 and 2011 compared to the years 2007 to 2009. The majority of patients carrying CPE did not have history of travel abroad. The rapid emergence of autochthonous CPE strains in Belgium since 2010 warrants strengthened epidemiological surveillance at national level.
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Affiliation(s)
- T- D Huang
- Laboratory of Microbiology, Centre Hospitalier Universitaire Mont-Godinne (UCL), Yvoir, Belgium
| | - P Bogaerts
- Laboratory of Microbiology, Centre Hospitalier Universitaire Mont-Godinne (UCL), Yvoir, Belgium
| | - C Berhin
- Laboratory of Microbiology, Centre Hospitalier Universitaire Mont-Godinne (UCL), Yvoir, Belgium
| | - B Jans
- Epidemiology Unit, Scientific Institute of Public Health, Brussels, Belgium
| | - A Deplano
- Laboratory of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - O Denis
- Laboratory of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - Y Glupczynski
- Laboratory of Microbiology, Centre Hospitalier Universitaire Mont-Godinne (UCL), Yvoir, Belgium
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Adams NG, Adekambi T, Afeltra J, Aguado J, Aires de Sousa M, Akiyoshi K, Al Hasan M, Ala-Kokko T, Albert M, Alfandari S, Allen D, Allerberger F, Almyroudis N, Alp E, Amin R, Anderson-Berry A, Andes DR, Andremont A, Andreu A, Angelakis M, Antachopoulos C, Antoniadou A, Arabatzis M, Arlet G, Arnez M, Arnold C, Asensio A, Asseray N, Ausiello C, Avni T, Ayling R, Baddour L, Baguelin M, Bányai K, Barbour A, Basco LK, Bauer D, Bayston R, Beall B, Becker K, Behr M, Bejon P, Belliot G, Benito-Fernandez J, Benjamin D, Benschop K, Berencsi G, Bergeron MG, Bernard K, Berner R, Beyersmann J, Bille J, Bizzini A, Bjarnsholt T, Blanc D, Blanco J, Blot S, Bohnert J, Boillat N, Bonomo R, Bonten M, Bordon JM, Borel N, Boschiroli ML, Bosilkovski M, Bosso JA, Botelho-Nevers E, Bou G, Bretagne S, Brouqui P, Brun-Buisson C, Brunetto M, Bucher H, Buchheidt D, Buckling A, Bulpa P, Cambau E, Canducci F, Cantón R, Capobianchi M, Carattoli A, Carcopino X, Cardona-Castro N, Carling PC, Carrat F, Castilla J, Castilletti C, Cavaco L, Cavallo R, Ceccherini-Silberstein F, Centrón D, Chappuis F, Charrel R, Chen M, Chevaliez S, Chezzi C, Chomel B, Chowers M, Chryssanthou E, Ciammaruconi A, Ciccozzi M, Cid J, Ciofu O, Cisneros D, Ciufolini MG, Clark C, Clarke SC, Clayton R, Clementi M, Clemons K, Cloeckaert A, Cloud J, Coenye T, Cohen Bacri S, Cohen R, Coia J, Colombo A, Colson P, Concerse P, Cordonnier C, Cormican M, Cornaglia G, Cornely O, Costa S, Cots F, Craxi A, Creti R, Crnich C, Cuenca Estrella M, Cusi MG, d'Ettorre G, da Cruz Lamas C, Daikos G, Dannaoui E, De Barbeyrac B, De Grazia S, de Jager C, de Lamballerie X, de Marco F, del Palacio A, Delpeyroux F, Denamur E, Denis O, Depaquit J, Deplano A, Desenclos JC, Desjeux P, Deutch S, Di Luca D, Dianzani F, Diep B, Diestra K, Dignani C, Dimopoulos G, Divizia M, Doi Y, Dornbusch HJ, Dotis J, Drancourt M, Drevinek P, Dromer F, Dryden M, Dubreuil L, Dubus JC, Dumitrescu O, Dumke R, DuPont H, Edelstein M, Eggimann P, Eis-Huebinger AM, El Atrouni WI, Entenza J, Ergonul O, Espinel-Ingroff A, Esteban J, Etienne J, Fan XG, Fenollar F, Ferrante P, Ferrieri P, Ferry T, Feuchtinger T, Finegold S, Fingerle V, Fitch M, Fitzgerald R, Flori P, Fluit A, Fontana R, Fournier PE, François M, Francois P, Freedman DO, Friedrich A, Gallego L, Gallinella G, Gangneux JP, Gannon V, Garbarg-Chenon A, Garbino J, Garnacho-Montero J, Gatermann S, Gautret P, Gentile G, Gerlich W, Ghannoum M, Ghebremedhin B, Ghigo E, Giamarellos-Bourboulis E, Girgis R, Giske C, Glupczynski Y, Gnarpe J, Gomez-Barrena E, Gorwitz RJ, Gosselin R, Goubau P, Gould E, Gradel K, Gray J, Gregson D, Greub G, Grijalva CG, Groll A, Groschup M, Gutiérrez J, Hackam DG, Hall WA, Hallett R, Hansen S, Harbarth S, Harf-Monteil C, Hasanjani RMR, Hasler P, Hatchette T, Hauser P, He Q, Hedges A, Helbig J, Hennequin C, Herrmann B, Hezode C, Higgins P, Hoesli I, Hoiby N, Hope W, Houvinen P, Hsu LY, Huard R, Humphreys H, Icardi M, Imoehl M, Ivanova K, Iwamoto T, Izopet J, Jackson Y, Jacobsen K, Jang TN, Jasir A, Jaulhac B, Jaureguy F, Jefferies JM, Jehl F, Johnstone J, Joly-Guillou ML, Jonas M, Jones M, Joukhadar C, Kahl B, Kaier K, Kaiser L, Kato H, Katragkou A, Kearns A, Kern W, Kerr K, Kessin R, Kibbler C, Kimberlin D, Kittang B, Klaassen C, Kluytmans J, Ko WC, Koh WJ, Kostrzewa M, Kourbeti I, Krause R, Krcmery V, Krizova P, Kuijper E, Kullberg BJ, Kumar G, Kunin CM, La Scola B, Lagging M, Lagrou K, Lamagni T, Landini P, Landman D, Larsen A, Lass-Floerl C, Laupland K, Lavigne JP, Leblebicioglu H, Lee B, Lee CH, Leggat P, Lehours P, Leibovici L, Leon L, Leonard N, Leone M, Lescure X, Lesprit P, Levy PY, Lew D, Lexau CA, Li SY, Li W, Lieberman D, Lina B, Lina G, Lindsay JA, Livermore D, Lorente L, Lortholary O, Lucet JC, Lund B, Lütticken R, MacLeod C, Madhi S, Maertens J, Maggi F, Maiden M, Maillard JY, Maira-Litran T, Maltezou H, Manian FA, Mantadakis E, Maragakis L, Marcelin AG, Marchaim D, Marchetti O, Marcos M, Markotic A, Martina B, Martínez J, Martinez JL, Marty F, Maurin M, McGee L, Mediannikov O, Meersseman W, Megraud F, Meletiadis J, Mellmann A, Meyer E, Meyer W, Meylan P, Michalopoulos A, Micol R, Midulla F, Mikami Y, Miller RF, Miragaia M, Miriagou V, Mitchell TJ, Miyakis S, Mokrousov I, Monecke S, Mönkemüller K, Monno L, Monod M, Morales G, Moriarty F, Morosini I, Mortensen E, Mubarak K, Mueller B, Mühlemann K, Muñoz Bellido JL, Murray P, Muscillo M, Mylotte J, Naessens A, Nagy E, Nahm MH, Nassif X, Navarro D, Navarro F, Neofytos D, Nes I, Ní Eidhin D, Nicolle L, Niederman MS, Nigro G, Nimmo G, Nordmann P, Nougairède A, Novais A, Nygard K, Oliveira D, Orth D, Ortiz JR, Osherov N, Österblad M, Ostrosky-Zeichner L, Pagano L, Palamara AT, Pallares R, Panagopoulou P, Pandey P, Panepinto J, Pappas G, Parkins M, Parola P, Pasqualotto A, Pasteran F, Paul M, Pawlotsky JM, Peeters M, Peixe L, Pepin J, Peralta G, Pereyre S, Perfect JR, Petinaki E, Petric M, Pettigrew M, Pfaller M, Philipp M, Phillips G, Pichichero M, Pierangeli A, Pierard D, Pigrau C, Pilishvili T, Pinto F, Pistello M, Pitout J, Poirel L, Poli G, Poppert S, Posfay-Barbe K, Pothier P, Poxton I, Poyart C, Pozzetto B, Pujol M, Pulcini C, Punyadeera C, Ramirez M, Ranque S, Raoult D, Rasigade JP, Re MC, Reilly JS, Reinert R, Renaud B, Rice L, Rich S, Richet H, Rigouts L, Riva E, Rizzo C, Robotham J, Rodicio MR, Rodriguez J, Rodriguez-Bano J, Rogier C, Roilides E, Rolain JM, Rooijakkers S, Rooney P, Rossi F, Rotimi V, Rottman M, Roux V, Ruhe J, Russo G, Sadowy E, Sagel U, Said SI, Saijo M, Sak B, Sa-Leao R, Sanders EAM, Sanguinetti M, Sarrazin C, Savelkoul P, Scheifele D, Schmidt WP, Schønheyder H, Schönrich G, Schrenzel J, Schubert S, Schwarz K, Schwarz S, Sefton A, Segondy M, Seifert H, Seng P, Senneville E, Sexton D, Shafer RW, Shalit I, Shankar N, Shata TM, Shields J, Sibley C, Sicinschi L, Siljander T, Simitsopoulou M, Simoons-Smit AM, Sissoko D, Sjögren J, Skiada A, Skoczynska A, Skov R, Slack M, Sogaard M, Sola C, Soriano A, Sotto A, Sougakoff W, Sougakoff W, Souli M, Spelberg B, Spelman D, Spiliopoulou I, Springer B, Stefani S, Stein A, Steinbach WJ, Steinbakk M, Strakova L, Strenger V, Sturm P, Sullivan P, Sutton D, Symmons D, Tacconelli E, Tamalet C, Tang JW, Tang YW, Tattevin P, Thibault V, Thomsen RW, Thuny F, Tong S, Torres C, Townsend R, Tristan A, Trouillet JL, Tsai HC, Tsitsopoulos P, Tuerlinckx D, Tulkens P, Tumbarello M, Tureen J, Turnidge JD, Turriziani O, Tutuian R, Uçkay I, Upton M, Vabret A, Vamvakas EC, van den Boom D, Van Eldere J, van Leeuwen W, van Strijp J, Van Veen S, Vandamme P, Vandenesch F, Vayssier M, Velin D, Venditti M, Venter M, Venuti A, Vergnaud G, Verheij T, Verhofstede C, Viscoli C, Vizza CD, Vogel U, Waller A, Wang YF, Warn P, Warris A, Wauters G, Weidmann M, Weill FX, Weinberger M, Welch D, Wellinghausen N, Wheat J, Widmer A, Wild F, Willems R, Willinger B, Winstanley C, Witte W, Wolff M, Wong F, Wootton M, Wyllie D, Xu W, Yamamoto S, Yaron S, Yildirim I, Zaoutis T, Zazzi M, Zbinden R, Zehender GG, Zemlickova H, Zerbini ML, Zhang L, Zhang Y, Zhao YD, Zhu Z, Zimmerli W. ACKNOWLEDGEMENT OF REVIEWERS. Clin Microbiol Infect 2011. [DOI: 10.1111/j.1469-0691.2010.03428.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rodriguez-Villalobos H, Bogaerts P, Berhin C, Bauraing C, Deplano A, Montesinos I, de Mendonça R, Jans B, Glupczynski Y. Trends in production of extended-spectrum beta-lactamases among Enterobacteriaceae of clinical interest: results of a nationwide survey in Belgian hospitals. J Antimicrob Chemother 2010; 66:37-47. [PMID: 21036771 DOI: 10.1093/jac/dkq388] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES to assess the frequency and diversity of extended-spectrum β-lactamases (ESBLs) in Enterobacteriaceae isolates in Belgium. METHODS during 2006 and 2008, non-duplicate clinical isolates of Enterobacteriaceae resistant to ceftazidime and/or cefotaxime were collected in 100 Belgian hospitals. ESBL production was confirmed by phenotypic and genotypic tests. MICs of 13 antimicrobial agents were determined by Etest. ESBL-encoding genes were identified by PCR sequencing and the bla(CTX-M) environment was characterized by PCR mapping. Selected isolates were genotyped by PFGE, multilocus sequence typing analysis and phylogenetic grouping by PCR. RESULTS overall, 733 isolates were confirmed as ESBL producers. Carbapenems and temocillin were active against ≥ 95% of all tested isolates. Co-resistance to co-trimoxazole and to ciprofloxacin was found in almost 70% and 80% of the strains, respectively. Overall, Escherichia coli (49%), Enterobacter aerogenes (32%) and Klebsiella pneumoniae (9%) represented the most prevalent species. Isolates harboured predominantly TEM-24 (30.7%), CTX-M-15 (24.2%) and TEM-52 (12.1%). Compared with 2006, the proportion of CTX-M-type enzymes increased significantly in 2008 (54% versus 23%; P < 10(-6)), mostly linked to a rising proportion of CTX-M-15-producing E. coli. TEM-24 decreased (19% in 2008 versus 43% in 2006; P < 10(-6)) during the same period, while the prevalence of TEM-52 remained unchanged (10% in 2008 versus 14% in 2006; not significant). Over 80% of the CTX-M-15-producing E. coli isolates clustered into a single PFGE type and phylogroup B2, corresponding to the sequence type (ST) 131 clone. Intra- and inter-species gene dissemination (CTX-M-15, CTX-M-2 and CTX-M-9) and wide epidemic spread of the CTX-M-15-producing E. coli ST131 clone in several Belgian hospitals were observed. CONCLUSIONS the rapid emergence of multiresistant CTX-M-15-producing E. coli isolates is of major concern and highlights the need for further surveillance in Belgium.
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Affiliation(s)
- H Rodriguez-Villalobos
- Laboratoire de Microbiologie, Hôpital Universitaire Erasme, Université Libre de Bruxelles, B-1070 Brussels, Belgium
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Montesinos I, Rodriguez-Villalobos H, De Mendonca R, Bogaerts P, Deplano A, Glupczynski Y. Molecular characterization of plasmids encoding CTX-M-15 extended-spectrum -lactamase associated with the ST131 Escherichia coli clone in Belgium. J Antimicrob Chemother 2010; 65:1828-30. [DOI: 10.1093/jac/dkq208] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Glupczynski Y, Bogaerts P, Deplano A, Berhin C, Huang TD, Van Eldere J, Rodriguez-Villalobos H. Detection and characterization of class A extended-spectrum- -lactamase-producing Pseudomonas aeruginosa isolates in Belgian hospitals. J Antimicrob Chemother 2010; 65:866-71. [DOI: 10.1093/jac/dkq048] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bogaerts P, Rodriguez-Villalobos H, Bauraing C, Deplano A, Laurent C, Berhin C, Struelens M, Glupczynski Y. Molecular characterization of AmpC-producing Escherichia coli clinical isolates recovered at two Belgian hospitals. ACTA ACUST UNITED AC 2010; 58:78-83. [DOI: 10.1016/j.patbio.2009.07.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Accepted: 07/23/2009] [Indexed: 10/20/2022]
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Bogaerts P, Montesinos I, Rodriguez-Villalobos H, Blairon L, Deplano A, Glupczynski Y. Emergence of clonally related Klebsiella pneumoniae isolates of sequence type 258 producing KPC-2 carbapenemase in Belgium. J Antimicrob Chemother 2009; 65:361-2. [DOI: 10.1093/jac/dkp453] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hallin M, Denis O, Deplano A, De Ryck R, Crèvecoeur S, Rottiers S, de Mendonça R, Struelens MJ. Evolutionary relationships between sporadic and epidemic strains of healthcare-associated methicillin-resistant Staphylococcus aureus. Clin Microbiol Infect 2008; 14:659-69. [PMID: 18558938 DOI: 10.1111/j.1469-0691.2008.02015.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
National surveillance of healthcare-associated methicillin-resistant Staphylococcus aureus (HA-MRSA) isolates by pulsed-field gel electrophoresis (PFGE) typing allowed identification of rarely occurring 'sporadic' isolates with patterns significantly distinct from those of major epidemic clones of methicillin-resistant S. aureus (MRSA) circulating in Belgian hospitals. The aim of the present study was to compare the genetic background, antibiotic susceptibility profile and in vitro growth rates of 36 MRSA isolates with either 'epidemic' or 'sporadic' PFGE profiles to identify factors that could be involved in the epidemic behaviour of S. aureus. Sequence analysis of seven housekeeping genes (multilocus sequence typing) and seven surface-associated genes, combined with staphylococcal cassette chromosome mec (SCCmec) typing and spa typing results, segregated sporadic isolates into four groups: (1) isolates phylogenetically distant from epidemic HA-MRSA clones that possessed several properties of community-acquired MRSA strains; (2) isolates derived from the same methicillin-susceptible S. aureus ancestor as epidemic isolates but possessing a distinct type of SCCmec; and (3) and (4) isolates that were closely related to epidemic strains, either as recent descendants of these or as intermediate evolutionary steps between epidemic HA-MRSA strains and their putative ancestors. Sporadic isolates did not show slower growth in vitro than epidemic isolates. These findings suggest that the SCCmec type and insertion/deletion of other mobile genetic elements may be involved in modulating the epidemic behaviour of MRSA strains of similar genetic background, independently of fitness cost.
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Affiliation(s)
- M Hallin
- Laboratoire de Référence MRSA-Staphylocoques, Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium.
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Laurent C, Rodriguez-Villalobos H, Rost F, Strale H, Vincent JL, Deplano A, Struelens MJ, Byl B. Intensive care unit outbreak of extended-spectrum beta-lactamase-producing Klebsiella pneumoniae controlled by cohorting patients and reinforcing infection control measures. Infect Control Hosp Epidemiol 2008; 29:517-24. [PMID: 18510461 DOI: 10.1086/588004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To describe an outbreak of extended-spectrum beta-lactamase (ESBL)-producing Klebsiella pneumoniae in the intensive care units (ICUs) of a hospital and the impact of routine and reinforced infection control measures on interrupting nosocomial transmission. DESIGN Outbreak report. SETTING A 31-bed intensive care department (composed of 4 ICUs) in a university hospital in Belgium. INTERVENTION After routine infection control measures (based on biweekly surveillance cultures and contact precautions) failed to interrupt a 2-month outbreak of ESBL-producing K. pneumoniae, reinforced infection control measures were implemented. The frequency of surveillance cultures was increased to daily sampling. Colonized patients were moved to a dedicated 6-bed ICU, where they received cohorted care with the support of additional nurses. Two beds were closed to new admissions in the intensive care department. Meetings between the ICU and infection control teams were held every day. Postdischarge disinfection of rooms was enforced. Broad-spectrum antibiotic use was discouraged. RESULTS Compared with a baseline rate of 0.44 cases per 1,000 patient-days for nosocomial transmission, the incidence peaked at 11.57 cases per 1,000 patient-days (October and November 2005; rate ratio for peak vs baseline, 25.46). The outbreak involved 30 patients, of whom 9 developed an infection. Bacterial genotyping disclosed that the outbreak was polyclonal, with 1 predominant genotype. Reinforced infection control measures lasted for 50 days. After the implementation of these measures, the incidence fell to 0.08 cases per 1,000 patient-days (rate ratio for after the outbreak vs during the outbreak, 0.11). CONCLUSION These data indicate that, in an intensive care department in which routine screening and contact precautions failed to prevent and interrupt an outbreak of ESBL-producing K. pneumoniae, reinforced infection control measures controlled the outbreak without major disruption of medical care.
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Affiliation(s)
- C Laurent
- Department of Infection Control and Epidemiology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
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Piscopo P, Marcon G, Piras MR, Crestini A, Campeggi LM, Deiana E, Cherchi R, Tanda F, Deplano A, Vanacore N, Tagliavini F, Pocchiari M, Giaccone G, Confaloni A. A novel PSEN2 mutation associated with a peculiar phenotype. Neurology 2008; 70:1549-54. [PMID: 18427071 DOI: 10.1212/01.wnl.0000310643.53587.87] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Mutations of presenilin 2 gene are a rare cause of familial Alzheimer disease (AD). We describe an Italian family with hereditary dementia associated with a novel mutation in the presenilin 2 gene. METHODS Clinical investigations of the diseased subjects; interviews with relatives; studies of medical records; pedigree analysis; and neuroradiologic, neuropathologic, and molecular genetic studies were carried out in the pedigree. RESULTS Genetic analysis showed a novel PSEN2 A85V mutation present in the proband and in all analyzed affected members, in a subject presenting with an amnesic mild cognitive impairment, and in a young, still asymptomatic subject. The proband showed a clinical phenotype indicative of Lewy body dementia and the neuropathologic examination demonstrated the presence of unusually abundant and widespread cortical Lewy bodies in addition to the hallmark lesions of AD. Other affected members exhibited a clinical phenotype typical of AD. CONCLUSIONS Our findings add complexity to the spectrum of atypical phenotypes associated with presenilin mutations and should then be taken into account when considering the nosography of neurodegenerative diseases. They also support previous data that specific mutations of genes associated with familial Alzheimer disease may influence the presence and extent of Lewy bodies.
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Affiliation(s)
- P Piscopo
- Istituto Superiore di Sanità, 00161 Rome, Italy
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Fanciulli G, Tomasi PA, Giusti M, Bertoncelli A, Deplano A, Garrucciu G, Delitala G. An inhibition of the hypothalamic somatostatinergic tone is not the cause of the enhanced growth hormone response to growth hormone-releasing hormone in patients with liver cirrhosis. Exp Clin Endocrinol Diabetes 2007; 116:148-51. [PMID: 18095239 DOI: 10.1055/s-2007-992119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Animal models of liver cirrhosis (LC) display a reduced hypothalamic somatostatinergic tone. To test whether a similar mechanism could explain the enhanced Growth Hormone (GH) secretory response to GH-Releasing Hormone (GHRH), which is seen in human LC, we studied the effect of the cholinesterase inhibitor pyridostigmine (PD), which is able to reduce the release of hypothalamic somatostatin (SS), on the GHRH-stimulated GH secretion. We considered that if PD were unable to increase GH secretion, this would constitute evidence of an already inhibited endogenous somatostatinergic tone. If proved, this in turn could explain the enhanced GH response to GHRH seen in LC. Ten LC patients and nine controls were given GHRH (100 microg, intravenously), or PD (120 mg, orally) plus GHRH. After GHRH alone, the GH peak was four times higher in LC than in controls (40.85+/-15.7 ng/ml in LC and 9.35+/-2.5 ng/ml in controls). In LC, PD administration markedly increased the GH response to GHRH (GH peak: 98.0+/-19.7 ng/ml; +240% vs. GHRH alone). The ability of PD to increase the GH response in patients with LC suggests that in this condition the enhanced GH response to GHRH is not due to a completely inhibited endogenous somatostatinergic tone. SS appears instead to maintain its modulator role on GH secretion in human LC, in contrast with what observed in animal models.
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Affiliation(s)
- G Fanciulli
- Dipartimento-Struttura Clinica Medica - Patologia Speciale Medica, University of Sassari, Sassari, Italy.
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Deplano A, Denis O, Nonhoff C, Rost F, Byl B, Jacobs F, Vankerckhoven V, Goossens H, Struelens MJ. Outbreak of hospital-adapted clonal complex-17 vancomycin-resistant Enterococcus faecium strain in a haematology unit: role of rapid typing for early control. J Antimicrob Chemother 2007; 60:849-54. [PMID: 17650516 DOI: 10.1093/jac/dkm270] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES To describe the investigation and molecular characterization of a vancomycin-resistant Enterococcus faecium (VREF) strain responsible for a nosocomial outbreak in the haematology unit of a tertiary-care university hospital. PATIENTS AND METHODS Two patients admitted to the haematology unit developed infection/colonization with VREF over a 3 month period when compared with none in the 2 previous years. On the basis of the identification of a clonal link between these two strains, weekly rectal screening was implemented for all patients in the haematology unit and contact precautions were extended to VREF carriers. In the following 6 month period, 11 patients colonized with VREF were detected. No further case was detected in the following 1 year period. RESULTS VREF isolates from the haematology unit carried the vanA gene and were multiresistant to antimicrobial agents, including high-level resistance to vancomycin, teicoplanin and ampicillin. This resistance profile restricted the choice of antimicrobial therapy to linezolid or investigational drugs such as tigecycline. Molecular analysis showed that 11 of 13 (85%) VREF isolates belonged to pandemic clonal complex-17 carrying the esp and hyl virulence genes. CONCLUSIONS Rapid typing and infection control measures, including early reinforcement of barrier precautions combined with weekly rectal surveillance cultures, were followed by control of nosocomial spread of this VREF clone.
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Affiliation(s)
- A Deplano
- Department of Microbiology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium.
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Vergison A, Denis O, Deplano A, Casimir G, Claeys G, DeBaets F, DeBoeck K, Douat N, Franckx H, Gigi J, Ieven M, Knoop C, Lebeque P, Lebrun F, Malfroot A, Paucquay F, Pierard D, Van Eldere J, Struelens MJ. National survey of molecular epidemiology of Staphylococcus aureus colonization in Belgian cystic fibrosis patients. J Antimicrob Chemother 2007; 59:893-9. [PMID: 17341469 DOI: 10.1093/jac/dkm037] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Epidemiology of methicillin-resistant Staphylococcus aureus (MRSA) is poorly defined in cystic fibrosis (CF) patients, and S. aureus detection may be hampered by the presence of small colony variants (SCVs). We conducted a multicentre survey to determine the prevalence of S. aureus and MRSA colonization in Belgian CF patients and characterize the phenotype and clonal distribution of their staphylococcal strains. METHODS S. aureus isolated from CF patients attending nine CF centres were collected. Oxacillin resistance was detected by oxacillin agar screen and mecA PCR. Antibiotic susceptibility was tested by microdilution. MRSA strains were genotyped by PFGE and SCCmec typing and compared with hospital-associated MRSA strains. RESULTS Laboratories used a diversity of sputum culture procedures, many of which appeared substandard. S. aureus was isolated from 275/627 (44%) CF patients (20% to 72% by centre). The prevalence of SCV colonization was 4%, but SCVs were almost exclusively recovered from patients in two centres performing an SCV search. Phenotypically, 14% of S. aureus isolates were oxacillin-resistant: 79% carried mecA and 19% were SCVs lacking mecA. The mean prevalence of 'true' MRSA colonization was 5% (0% to 17% by centre). By PFGE typing, 67% of CF-associated MRSA were related to five epidemic clones widespread in Belgian hospitals. CONCLUSIONS This first survey of S. aureus colonization in the Belgian CF population indicated a diversity in local prevalence rates and in proportion of oxacillin-resistant and SCV phenotypes, probably related to variation in bacteriological methods. These findings underscore the need for standard S. aureus detection methods and MRSA control policies in Belgian CF centres.
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Affiliation(s)
- A Vergison
- Department of Pediatric Infectious Diseases, Hospital Epidemiology and Infection Control Unit, Université Libre de Bruxelles, Hôpital des Enfants Reine Fabiola, Brussels, Belgium.
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Bogaerts P, Naas T, Bauraing C, Deplano A, Piérard D, Nordmann P, Glupczynski Y. P1006 Imported cases of carbapenem-resistant Acinetobacter baumannii producing OXA-23 carbapenemase in Belgium: characterisation and unusual loss of resistance. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70847-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Rodriguez-Villalobos H, Laurent C, Castany-Prado R, Deplano A, Byl B, de Mendonça R, Struelens M. P675 High frequency of CTX-M genes among ESBL-producing Klebsiella pneumoniae in a university hospital in Belgium. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70516-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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