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Mazalovska M, Kouokam JC. Lectins as Promising Therapeutics for the Prevention and Treatment of HIV and Other Potential Coinfections. BIOMED RESEARCH INTERNATIONAL 2018; 2018:3750646. [PMID: 29854749 PMCID: PMC5964492 DOI: 10.1155/2018/3750646] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/20/2018] [Accepted: 04/01/2018] [Indexed: 12/20/2022]
Abstract
Human immunodeficiency virus-acquired immunodeficiency syndrome (HIV/AIDS) remains a global health problem. Current therapeutics specifically target the viral pathogen at various stages of its life cycle, although complex interactions between HIV and other pathogenic organisms are evident. Targeting HIV and concomitant infectious pathogens simultaneously, both by therapeutic regimens and in prevention strategies, would help contain the AIDS pandemic. Lectins, a ubiquitous group of proteins that specifically bind glycosylated molecules, are interesting compounds that could be used for this purpose, with demonstrated anti-HIV properties. In addition, potential coinfecting pathogens, including other enveloped viruses, bacteria, yeasts and fungi, and protozoa, display sugar-coated macromolecules on their surfaces, making them potential targets of lectins. This review summarizes the currently available findings suggesting that lectins should be further developed to simultaneously fight the AIDS pandemic and concomitant infections in HIV infected individuals.
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Affiliation(s)
- Milena Mazalovska
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY 40202, USA
- Center for Predictive Medicine, University of Louisville, Louisville, KY 40202, USA
| | - J. Calvin Kouokam
- Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, KY 40202, USA
- Center for Predictive Medicine, University of Louisville, Louisville, KY 40202, USA
- James Graham Brown Cancer Center, University of Louisville School of Medicine, Louisville, KY 40202, USA
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52
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Rabbani S, Fiege B, Eris D, Silbermann M, Jakob RP, Navarra G, Maier T, Ernst B. Conformational switch of the bacterial adhesin FimH in the absence of the regulatory domain: Engineering a minimalistic allosteric system. J Biol Chem 2018; 293:1835-1849. [PMID: 29180452 PMCID: PMC5798311 DOI: 10.1074/jbc.m117.802942] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 11/23/2017] [Indexed: 11/06/2022] Open
Abstract
For many biological processes such as ligand binding, enzymatic catalysis, or protein folding, allosteric regulation of protein conformation and dynamics is fundamentally important. One example is the bacterial adhesin FimH, where the C-terminal pilin domain exerts negative allosteric control over binding of the N-terminal lectin domain to mannosylated ligands on host cells. When the lectin and pilin domains are separated under shear stress, the FimH-ligand interaction switches in a so-called catch-bond mechanism from the low- to high-affinity state. So far, it has been assumed that the pilin domain is essential for the allosteric propagation within the lectin domain that would otherwise be conformationally rigid. To test this hypothesis, we generated mutants of the isolated FimH lectin domain and characterized their thermodynamic, kinetic, and structural properties using isothermal titration calorimetry, surface plasmon resonance, nuclear magnetic resonance, and X-ray techniques. Intriguingly, some of the mutants mimicked the conformational and kinetic behaviors of the full-length protein and, even in absence of the pilin domain, conducted the cross-talk between allosteric sites and the mannoside-binding pocket. Thus, these mutants represent a minimalistic allosteric system of FimH, useful for further mechanistic studies and antagonist design.
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Affiliation(s)
- Said Rabbani
- From the Department of Pharmaceutical Sciences, Pharmacenter of the University of Basel, Klingelbergstrasse 50 and
| | - Brigitte Fiege
- From the Department of Pharmaceutical Sciences, Pharmacenter of the University of Basel, Klingelbergstrasse 50 and
| | - Deniz Eris
- From the Department of Pharmaceutical Sciences, Pharmacenter of the University of Basel, Klingelbergstrasse 50 and
| | - Marleen Silbermann
- From the Department of Pharmaceutical Sciences, Pharmacenter of the University of Basel, Klingelbergstrasse 50 and
| | - Roman Peter Jakob
- the Department Biozentrum, Focal Area Structural Biology, University of Basel, Klingelbergstrasse 70, 4056 Basel, Switzerland
| | - Giulio Navarra
- From the Department of Pharmaceutical Sciences, Pharmacenter of the University of Basel, Klingelbergstrasse 50 and
| | - Timm Maier
- the Department Biozentrum, Focal Area Structural Biology, University of Basel, Klingelbergstrasse 70, 4056 Basel, Switzerland
| | - Beat Ernst
- From the Department of Pharmaceutical Sciences, Pharmacenter of the University of Basel, Klingelbergstrasse 50 and
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53
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Nierengarten JF, Schneider JP, Trinh TMN, Joosten A, Holler M, Lepage ML, Bodlenner A, García-Moreno MI, Ortiz Mellet C, Compain P. Giant Glycosidase Inhibitors: First- and Second-Generation Fullerodendrimers with a Dense Iminosugar Shell. Chemistry 2018; 24:2483-2492. [DOI: 10.1002/chem.201705600] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Jean-François Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires; Université de Strasbourg et CNRS (UMR 7509); Ecole Européenne de Chimie, Polymères et Matériaux; 25 rue Becquerel 67087 Strasbourg Cedex 2 France
| | - Jérémy P. Schneider
- Laboratoire de Synthèse Organique et Molécules Bioactives; Université de Strasbourg et CNRS (UMR 7509); Ecole Européenne de Chimie, Polymères et Matériaux; 25 rue Becquerel 67087 Strasbourg Cedex 2 France
| | - Thi Minh Nguyet Trinh
- Laboratoire de Chimie des Matériaux Moléculaires; Université de Strasbourg et CNRS (UMR 7509); Ecole Européenne de Chimie, Polymères et Matériaux; 25 rue Becquerel 67087 Strasbourg Cedex 2 France
| | - Antoine Joosten
- Laboratoire de Synthèse Organique et Molécules Bioactives; Université de Strasbourg et CNRS (UMR 7509); Ecole Européenne de Chimie, Polymères et Matériaux; 25 rue Becquerel 67087 Strasbourg Cedex 2 France
| | - Michel Holler
- Laboratoire de Chimie des Matériaux Moléculaires; Université de Strasbourg et CNRS (UMR 7509); Ecole Européenne de Chimie, Polymères et Matériaux; 25 rue Becquerel 67087 Strasbourg Cedex 2 France
| | - Mathieu L. Lepage
- Laboratoire de Synthèse Organique et Molécules Bioactives; Université de Strasbourg et CNRS (UMR 7509); Ecole Européenne de Chimie, Polymères et Matériaux; 25 rue Becquerel 67087 Strasbourg Cedex 2 France
| | - Anne Bodlenner
- Laboratoire de Synthèse Organique et Molécules Bioactives; Université de Strasbourg et CNRS (UMR 7509); Ecole Européenne de Chimie, Polymères et Matériaux; 25 rue Becquerel 67087 Strasbourg Cedex 2 France
| | - M. Isabel García-Moreno
- Departamento de Química Orgánica; Facultad de Química; Universidad de Sevilla; Profesor García González 1 41012 Sevilla Spain
| | - Carmen Ortiz Mellet
- Departamento de Química Orgánica; Facultad de Química; Universidad de Sevilla; Profesor García González 1 41012 Sevilla Spain
| | - Philippe Compain
- Laboratoire de Synthèse Organique et Molécules Bioactives; Université de Strasbourg et CNRS (UMR 7509); Ecole Européenne de Chimie, Polymères et Matériaux; 25 rue Becquerel 67087 Strasbourg Cedex 2 France
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54
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Daskhan GC, Tran HTT, Meloncelli PJ, Lowary TL, West LJ, Cairo CW. Construction of Multivalent Homo- and Heterofunctional ABO Blood Group Glycoconjugates Using a Trifunctional Linker Strategy. Bioconjug Chem 2018; 29:343-362. [PMID: 29237123 DOI: 10.1021/acs.bioconjchem.7b00679] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The design and synthesis of multivalent ligands displaying complex oligosaccharides is necessary for the development of therapeutics, diagnostics, and research tools. Here, we report an efficient conjugation strategy to prepare complex glycoconjugates with 4 copies of 1 or 2 separate glycan epitopes, providing 4-8 carbohydrate residues on a tetravalent poly(ethylene glycol) scaffold. This strategy provides complex glycoconjugates that approach the size of glycoproteins (15-18 kDa) while remaining well-defined. The synthetic strategy makes use of three orthogonal functional groups, including a reactive N-hydroxysuccinimide (NHS)-ester moiety on the linker to install the first carbohydrate epitope via reaction with an amine. A masked amine functionality on the linker is revealed after the removal of a fluorenylmethyloxycarbonyl (Fmoc)-protecting group, allowing the attachment to the NHS-activated poly(ethylene glycol) (PEG) scaffold. An azide group in the linker was then used to incorporate the second carbohydrate epitope via catalyzed alkyne-azide cycloaddition. Using a known tetravalent PEG scaffold (PDI, 1.025), we prepared homofunctional glycoconjugates that display four copies of lactose and the A-type II or the B-type II human blood group antigens. Using our trifunctional linker, we expanded this strategy to produce heterofunctional conjugates with four copies of two separate glycan epitopes. These heterofunctional conjugates included Neu5Ac, 3'-sialyllactose, or 6'-sialyllactose as a second antigen. Using an alternative strategy, we generated heterofunctional conjugates with three copies of the glycan epitope and one fluorescent group (on average) using a sequential dual-amine coupling strategy. These conjugation strategies should be easily generalized for conjugation of other complex glycans. We demonstrate that the glycan epitopes of heterofunctional conjugates engage and cluster target B-cell receptors and CD22 receptors on B cells, supporting the application of these reagents for investigating cellular response to carbohydrate antigens of the ABO blood group system.
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Affiliation(s)
- Gour Chand Daskhan
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta , Edmonton, Alberta T6G 2G2, Canada
| | - Hanh-Thuc Ton Tran
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta , Edmonton, Alberta T6G 2G2, Canada
| | - Peter J Meloncelli
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta , Edmonton, Alberta T6G 2G2, Canada
| | - Todd L Lowary
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta , Edmonton, Alberta T6G 2G2, Canada.,Canadian National Transplant Research Program, University of Alberta , Edmonton, Alberta T6G 2E1, Canada
| | - Lori J West
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta , Edmonton, Alberta T6G 2G2, Canada.,Department of Pediatrics, Surgery, Medical Microbiology and Immunology, and Laboratory Medicine and Pathology, Alberta Transplant Institute, University of Alberta Edmonton, Alberta T6G 2E1, Canada.,Canadian National Transplant Research Program, University of Alberta , Edmonton, Alberta T6G 2E1, Canada
| | - Christopher W Cairo
- Alberta Glycomics Centre, Department of Chemistry, University of Alberta , Edmonton, Alberta T6G 2G2, Canada.,Canadian National Transplant Research Program, University of Alberta , Edmonton, Alberta T6G 2E1, Canada
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55
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Cutolo G, Reise F, Schuler M, Nehmé R, Despras G, Brekalo J, Morin P, Renard PY, Lindhorst TK, Tatibouët A. Bifunctional mannoside–glucosinolate glycoconjugates as enzymatically triggered isothiocyanates and FimH ligands. Org Biomol Chem 2018; 16:4900-4913. [DOI: 10.1039/c8ob01128a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of glucosinolate–mannoside glycoconjugates combining both the structural features of a myrosinase substrate and a FimH ligand is described.
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Affiliation(s)
- G. Cutolo
- Institut de Chimie Organique et Analytique - ICOA UMR 7311 CNRS Université d'Orléans - Rue de Chartres
- 45067 Orléans cedex 02
- France
| | - F. Reise
- Otto Diels Institute of Organic Chemistry
- Christian-Albrechts University of Kiel
- D-24118 Kiel
- Germany
| | - M. Schuler
- Institut de Chimie Organique et Analytique - ICOA UMR 7311 CNRS Université d'Orléans - Rue de Chartres
- 45067 Orléans cedex 02
- France
| | - R. Nehmé
- Institut de Chimie Organique et Analytique - ICOA UMR 7311 CNRS Université d'Orléans - Rue de Chartres
- 45067 Orléans cedex 02
- France
| | - G. Despras
- Otto Diels Institute of Organic Chemistry
- Christian-Albrechts University of Kiel
- D-24118 Kiel
- Germany
| | - J. Brekalo
- Institut de Chimie Organique et Analytique - ICOA UMR 7311 CNRS Université d'Orléans - Rue de Chartres
- 45067 Orléans cedex 02
- France
- Otto Diels Institute of Organic Chemistry
- Christian-Albrechts University of Kiel
| | - P. Morin
- Institut de Chimie Organique et Analytique - ICOA UMR 7311 CNRS Université d'Orléans - Rue de Chartres
- 45067 Orléans cedex 02
- France
| | - P.-Y. Renard
- Normandie Université
- Université de Rouen; INSA Rouen; CNRS
- 76000 Rouen
- COBRA UMR 6014 & FR 3038 IRCOF
- 76821 Mont-Saint-Aignan cedex
| | - T. K. Lindhorst
- Otto Diels Institute of Organic Chemistry
- Christian-Albrechts University of Kiel
- D-24118 Kiel
- Germany
| | - A. Tatibouët
- Institut de Chimie Organique et Analytique - ICOA UMR 7311 CNRS Université d'Orléans - Rue de Chartres
- 45067 Orléans cedex 02
- France
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56
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Sager CP, Eriş D, Smieško M, Hevey R, Ernst B. What contributes to an effective mannose recognition domain? Beilstein J Org Chem 2017; 13:2584-2595. [PMID: 29259668 PMCID: PMC5727865 DOI: 10.3762/bjoc.13.255] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 11/15/2017] [Indexed: 12/27/2022] Open
Abstract
In general, carbohydrate-lectin interactions are characterized by high specificity but also low affinity. The main reason for the low affinities are desolvation costs, due to the numerous hydroxy groups present on the ligand, together with the typically polar surface of the binding sites. Nonetheless, nature has evolved strategies to overcome this hurdle, most prominently in relation to carbohydrate-lectin interactions of the innate immune system but also in bacterial adhesion, a process key for the bacterium's survival. In an effort to better understand the particular characteristics, which contribute to a successful carbohydrate recognition domain, the mannose-binding sites of six C-type lectins and of three bacterial adhesins were analyzed. One important finding is that the high enthalpic penalties caused by desolvation can only be compensated for by the number and quality of hydrogen bonds formed by each of the polar hydroxy groups engaged in the binding process. In addition, since mammalian mannose-binding sites are in general flat and solvent exposed, the half-lives of carbohydrate-lectin complexes are rather short since water molecules can easily access and displace the ligand from the binding site. In contrast, the bacterial lectin FimH benefits from a deep mannose-binding site, leading to a substantial improvement in the off-rate. Together with both a catch-bond mechanism (i.e., improvement of affinity under shear stress) and multivalency, two methods commonly utilized by pathogens, the affinity of the carbohydrate-FimH interaction can be further improved. Including those just described, the various approaches explored by nature to optimize selectivity and affinity of carbohydrate-lectin interactions offer interesting therapeutic perspectives for the development of carbohydrate-based drugs.
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Affiliation(s)
- Christoph P Sager
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland
| | - Deniz Eriş
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland
| | - Martin Smieško
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland
| | - Rachel Hevey
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland
| | - Beat Ernst
- Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland
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57
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Igde S, Röblitz S, Müller A, Kolbe K, Boden S, Fessele C, Lindhorst TK, Weber M, Hartmann L. Linear Precision Glycomacromolecules with Varying Interligand Spacing and Linker Functionalities Binding to Concanavalin A and the Bacterial Lectin FimH. Macromol Biosci 2017; 17. [DOI: 10.1002/mabi.201700198] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 08/18/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Sinaida Igde
- Department for Organic Chemistry and Macromolecular Chemistry; Heinrich-Heine-Universität; Universitätsstraße 1 40225 Düsseldorf Germany
| | - Susanna Röblitz
- Department of Numerical Mathematics; Zuse Institute Berlin (ZIB); Takustr. 7 14195 Berlin Germany
- Department of Mathematics and Computer Science; Freie Universität Berlin; Arnimallee 6 14195 Berlin Germany
| | - Anne Müller
- Otto Diels Institute of Organic Chemistry; Christiana Albertina University of Kiel; Otto-Hahn-Platz 3-4 24118 Kiel Germany
| | - Katharina Kolbe
- Otto Diels Institute of Organic Chemistry; Christiana Albertina University of Kiel; Otto-Hahn-Platz 3-4 24118 Kiel Germany
| | - Sophia Boden
- Department for Organic Chemistry and Macromolecular Chemistry; Heinrich-Heine-Universität; Universitätsstraße 1 40225 Düsseldorf Germany
| | - Claudia Fessele
- Otto Diels Institute of Organic Chemistry; Christiana Albertina University of Kiel; Otto-Hahn-Platz 3-4 24118 Kiel Germany
| | - Thisbe K. Lindhorst
- Otto Diels Institute of Organic Chemistry; Christiana Albertina University of Kiel; Otto-Hahn-Platz 3-4 24118 Kiel Germany
| | - Marcus Weber
- Department of Numerical Mathematics; Zuse Institute Berlin (ZIB); Takustr. 7 14195 Berlin Germany
- Department of Mathematics and Computer Science; Freie Universität Berlin; Arnimallee 6 14195 Berlin Germany
| | - Laura Hartmann
- Department for Organic Chemistry and Macromolecular Chemistry; Heinrich-Heine-Universität; Universitätsstraße 1 40225 Düsseldorf Germany
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58
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Gade M, Chaudhary PM, Thulasiram HV, Kikkeri R. Engineering Cell Surface Glycans with Carbohydrate Enantiomers to Alter Bacterial Binding and Adhesion. ChemistrySelect 2017. [DOI: 10.1002/slct.201701875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Madhuri Gade
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road Pune- 411008 India
| | - Preeti Madhukar Chaudhary
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road Pune- 411008 India
| | - Hirekodathakallu V. Thulasiram
- Chemical Biology Unit; Division of Organic Chemistry; CSIR-National chemical Laboratory; Dr. Homi Bhabha Road Pune- 411008 India
| | - Raghavendra Kikkeri
- Department of Chemistry; Indian Institute of Science Education and Research; Dr. Homi Bhabha Road Pune- 411008 India
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59
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Halouane F, Jijie R, Meziane D, Li C, Singh SK, Bouckaert J, Jurazek J, Kurungot S, Barras A, Li M, Boukherroub R, Szunerits S. Selective isolation and eradication of E. coli associated with urinary tract infections using anti-fimbrial modified magnetic reduced graphene oxide nanoheaters. J Mater Chem B 2017; 5:8133-8142. [PMID: 32264652 DOI: 10.1039/c7tb01890h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The fast and efficient elimination of pathogenic bacteria from water, food or biological samples such as blood remains a challenging task. Magnetic isolation of bacteria from complex media holds particular promise for water disinfection and other biotechnological applications employing bacteria. When it comes to infectious diseases such as urinary tract infections, the selective removal of the pathogenic species in complex media such as human serum is also of importance. This issue can only be accomplished by adding pathogen specific targeting sites onto the magnetic nanostructures. In this work, we investigate the potential of 2-nitrodopamine modified magnetic particles anchored on reduced graphene oxide (rGO) nanocomposites for rapid capture and efficient elimination of E. coli associated with urinary tract infections (UTIs) from water and serum samples. An optimized magnetic nanocarrier achieves a 99.9% capture efficiency even at E. coli concentrations of 1 × 101 cfu mL-1 in 30 min. In addition, functionalization of the nanostructures with poly(ethylene glycol) modified pyrene units and anti-fimbrial E. coli antibodies allowed specific elimination of E. coli UTI89 from serum samples. Irradiation of the E. coli loaded nanocomposite with a near-infrared laser results in the total ablation of the captured pathogens. This method can be flexibly modified for any other pathogenic bacteria, depending on the antibodies used, and might be an interesting alternative material for a magnetic-based body fluid purification approach.
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Affiliation(s)
- Fatima Halouane
- Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520-IEMN, F-59000 Lille, France.
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60
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Alvarez Dorta D, Chalopin T, Sivignon A, de Ruyck J, Dumych TI, Bilyy RO, Deniaud D, Barnich N, Bouckaert J, Gouin SG. Physiochemical Tuning of Potent Escherichia coli Anti-Adhesives by Microencapsulation and Methylene Homologation. ChemMedChem 2017; 12:986-998. [PMID: 28257558 DOI: 10.1002/cmdc.201700061] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Indexed: 11/06/2022]
Abstract
Thiazolylaminomannosides (TazMan) are FimH antagonists with anti-adhesive potential against adherent-invasive Escherichia coli (AIEC) promoting gut inflammation in patients with Crohn's disease. The lead TazMan is highly potent in vitro, but shows limited in vivo efficiency, probably due to low pH stability and water solubility. We recently developed a second generation of stable TazMan, but the anti-adhesive effect was lower than the first. Herein we report a co-crystal structure of the lead TazMan in FimH, revealing that the anomeric NH group and the second thiazole moiety provide a positive hydrogen bonding interaction with a trapped water molecule, and π-stacking with Tyr48 of FimH, respectively. Consequently, we developed NeoTazMan homologated with a methylene group for low-pH and mannosidase stability with a conserved NH group and bearing various heterocyclic aglycones. Microencapsulation of the lead NeoTazMan in γ-cyclodextrin dramatically improved water solubility without disrupting the affinity for FimH or the anti-adhesive effect against AIEC isolated from patients with Crohn's disease.
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Affiliation(s)
- Dimitri Alvarez Dorta
- LUNAM Université, CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, UFR des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322, Nantes Cedex 3, France
| | - Thibaut Chalopin
- LUNAM Université, CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, UFR des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322, Nantes Cedex 3, France
| | - Adeline Sivignon
- Université Clermont Auvergne, Inserm U1071, M2iSH, USC-INRA 2018, 63000, Clermont-Ferrand, France
| | - Jérôme de Ruyck
- Université Lille, Unité de Glycobiologie Structurale et Fonctionnelle, CNRS UMR8576 UGSF, FRABio FR3688, 59000, Lille, France
| | - Tetiana I Dumych
- Danylo Halytsky Lviv National Medical University, Pekarska Str. 69, 79010, Lviv, Ukraine
| | - Rostyslav O Bilyy
- Danylo Halytsky Lviv National Medical University, Pekarska Str. 69, 79010, Lviv, Ukraine
| | - David Deniaud
- LUNAM Université, CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, UFR des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322, Nantes Cedex 3, France
| | - Nicolas Barnich
- Université Clermont Auvergne, Inserm U1071, M2iSH, USC-INRA 2018, 63000, Clermont-Ferrand, France
| | - Julie Bouckaert
- Université Lille, Unité de Glycobiologie Structurale et Fonctionnelle, CNRS UMR8576 UGSF, FRABio FR3688, 59000, Lille, France
| | - Sébastien G Gouin
- LUNAM Université, CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, UFR des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322, Nantes Cedex 3, France
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61
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Rabbani S, Krammer EM, Roos G, Zalewski A, Preston R, Eid S, Zihlmann P, Prévost M, Lensink MF, Thompson A, Ernst B, Bouckaert J. Mutation of Tyr137 of the universal Escherichia coli fimbrial adhesin FimH relaxes the tyrosine gate prior to mannose binding. IUCRJ 2017; 4:7-23. [PMID: 28250938 PMCID: PMC5331462 DOI: 10.1107/s2052252516016675] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 10/18/2016] [Indexed: 05/08/2023]
Abstract
The most prevalent diseases manifested by Escherichia coli are acute and recurrent bladder infections and chronic inflammatory bowel diseases such as Crohn's disease. E. coli clinical isolates express the FimH adhesin, which consists of a mannose-specific lectin domain connected via a pilin domain to the tip of type 1 pili. Although the isolated FimH lectin domain has affinities in the nanomolar range for all high-mannosidic glycans, differentiation between these glycans is based on their capacity to form predominantly hydrophobic interactions within the tyrosine gate at the entrance to the binding pocket. In this study, novel crystal structures of tyrosine-gate mutants of FimH, ligand-free or in complex with heptyl α-d-O-mannopyranoside or 4-biphenyl α-d-O-mannopyranoside, are combined with quantum-mechanical calculations and molecular-dynamics simulations. In the Y48A FimH crystal structure, a large increase in the dynamics of the alkyl chain of heptyl α-d-O-mannopyranoside attempts to compensate for the absence of the aromatic ring; however, the highly energetic and stringent mannose-binding pocket of wild-type FimH is largely maintained. The Y137A mutation, on the other hand, is the most detrimental to FimH affinity and specificity: (i) in the absence of ligand the FimH C-terminal residue Thr158 intrudes into the mannose-binding pocket and (ii) ethylenediaminetetraacetic acid interacts strongly with Glu50, Thr53 and Asn136, in spite of multiple dialysis and purification steps. Upon mutation, pre-ligand-binding relaxation of the backbone dihedral angles at position 137 in the tyrosine gate and their coupling to Tyr48 via the interiorly located Ile52 form the basis of the loss of affinity of the FimH adhesin in the Y137A mutant.
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Affiliation(s)
- Said Rabbani
- Institute of Molecular Pharmacy, Pharmacenter, University of Basel, Klingelbergstrasse 50-70, CH-4056 Basel, Switzerland
| | - Eva-Maria Krammer
- University of Lille, CNRS UMR8576 UGSF (Unité de Glycobiologie Structurale et Fonctionnelle), 59000 Lille, France
- Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Goedele Roos
- University of Lille, CNRS UMR8576 UGSF (Unité de Glycobiologie Structurale et Fonctionnelle), 59000 Lille, France
- Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Adam Zalewski
- Institute of Molecular Pharmacy, Pharmacenter, University of Basel, Klingelbergstrasse 50-70, CH-4056 Basel, Switzerland
| | - Roland Preston
- Institute of Molecular Pharmacy, Pharmacenter, University of Basel, Klingelbergstrasse 50-70, CH-4056 Basel, Switzerland
| | - Sameh Eid
- Institute of Molecular Pharmacy, Pharmacenter, University of Basel, Klingelbergstrasse 50-70, CH-4056 Basel, Switzerland
| | - Pascal Zihlmann
- Institute of Molecular Pharmacy, Pharmacenter, University of Basel, Klingelbergstrasse 50-70, CH-4056 Basel, Switzerland
| | - Martine Prévost
- Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Marc F. Lensink
- University of Lille, CNRS UMR8576 UGSF (Unité de Glycobiologie Structurale et Fonctionnelle), 59000 Lille, France
| | - Andrew Thompson
- Synchrotron SOLEIL, l’Orme de Merisiers, Saint-Aubin BP48, Gif-sur-Yvette CEDEX, France
| | - Beat Ernst
- Institute of Molecular Pharmacy, Pharmacenter, University of Basel, Klingelbergstrasse 50-70, CH-4056 Basel, Switzerland
| | - Julie Bouckaert
- University of Lille, CNRS UMR8576 UGSF (Unité de Glycobiologie Structurale et Fonctionnelle), 59000 Lille, France
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Formisano N, Bhalla N, Heeran M, Reyes Martinez J, Sarkar A, Laabei M, Jolly P, Bowen CR, Taylor JT, Flitsch S, Estrela P. Inexpensive and fast pathogenic bacteria screening using field-effect transistors. Biosens Bioelectron 2016; 85:103-109. [DOI: 10.1016/j.bios.2016.04.063] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 04/03/2016] [Accepted: 04/20/2016] [Indexed: 01/24/2023]
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Daskhan GC, Pifferi C, Renaudet O. Synthesis of a New Series of Sialylated Homo- and Heterovalent Glycoclusters by using Orthogonal Ligations. ChemistryOpen 2016; 5:477-484. [PMID: 27777841 PMCID: PMC5062014 DOI: 10.1002/open.201600062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Indexed: 12/19/2022] Open
Abstract
The synthesis of heteroglycoclusters (hGCs) is being subjected to rising interest, owing to their potential applications in glycobiology. In this paper, we report an efficient and straightforward convergent protocol based on orthogonal chemoselective ligations to prepare structurally well-defined cyclopeptide-based homo- and heterovalent glycoconjugates displaying 5-N-acetyl-neuraminic acid (Neu5Ac), galactose (Gal), and/or N-acetyl glucosamine (GlcNAc). We first used copper-catalyzed azide-alkyne cycloaddition and/or thiol-ene coupling to conjugate propargylated α-sialic acid 3, β-GlcNAc thiol 5, and β-Gal thiol 6 onto cyclopeptide scaffolds 7-9 to prepare tetravalent homoglycoclusters (10-12) and hGCs (13-14) with 2:2 combinations of sugars. In addition, we have demonstrated that 1,2-diethoxycyclobutene-3,4-dione can be used as a bivalent linker to prepare various octavalent hGCs (16, 19, and 20) in a controlled manner from these tetravalent structures.
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Affiliation(s)
- Gour Chand Daskhan
- Université Grenoble Alpes, Département de Chimie Moléculaire (DCM), CNRS, DCM 38000 Grenoble France
| | - Carlo Pifferi
- Université Grenoble Alpes, Département de Chimie Moléculaire (DCM), CNRS, DCM 38000 Grenoble France
| | - Olivier Renaudet
- Université Grenoble Alpes, Département de Chimie Moléculaire (DCM), CNRS, DCM 38000 Grenoble France; Institut Universitaire de France 103 boulevard Saint-Michel 75005 Paris France
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64
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Chalopin T, Brissonnet Y, Sivignon A, Deniaud D, Cremet L, Barnich N, Bouckaert J, Gouin SG. Inhibition profiles of mono- and polyvalent FimH antagonists against 10 different Escherichia coli strains. Org Biomol Chem 2016; 13:11369-75. [PMID: 26440382 DOI: 10.1039/c5ob01581b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mono- and polyvalent ligands with strong affinities for the mannose-binding adhesin FimH were synthesised, and their anti-adhesive properties against ten E. coli strains were compared in two cell-based assays. The compounds were assessed against the non-pathogenic E. coli K12 and nine strains isolated by coproculture or from patients with osteoarticular infections (OIs), Crohn's disease (CD) and urinary tract infections (UTIs). The results showed that the compounds could inhibit the whole set of bacterial strains but with marked differences in terms of effective concentrations. The relative inhibitory potency of the monovalent compounds was also conserved for the ten strains and in the two assays. These results clearly suggest that a potent monovalent anti-adhesive assessed on a single E. coli strain will probably be effective on a broad range of strains and may treat diverse E. coli infections (OIs, CD and UTIs). In contrast, the polyvalent compounds showed a significant strain-dependancy in preventing E. coli attachment to intestinal cells. The multivalent antiadhesive effect may therefore vary depending on the E. coli strain tested.
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Affiliation(s)
- T Chalopin
- LUNAM Université, CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, UFR des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France.
| | - Y Brissonnet
- LUNAM Université, CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, UFR des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France.
| | - A Sivignon
- Clermont Université, UMR 1071 Inserm/Université d'Auvergne, 63000 Clermont-Ferrand, France and INRA, Unité Sous Contrat 2018, 63000 Clermont-Ferrand, France
| | - D Deniaud
- LUNAM Université, CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, UFR des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France.
| | - L Cremet
- Université de Nantes, UFR de Médecine, EA3826, Thérapeutiques cliniques et expérimentales des infections, 1 rue G. Veil, 44000 Nantes, France
| | - N Barnich
- Clermont Université, UMR 1071 Inserm/Université d'Auvergne, 63000 Clermont-Ferrand, France and INRA, Unité Sous Contrat 2018, 63000 Clermont-Ferrand, France
| | - J Bouckaert
- Unité de Glycobiologie Structurale et Fonctionnelle (UGSF), UMR 8576 du CNRS, Université de Lille 1, F-59655 Villeneuve d'Ascq Cedex, France
| | - S G Gouin
- LUNAM Université, CEISAM, Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, UFR des Sciences et des Techniques, 2 rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France.
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65
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Richards SJ, Otten L, Gibson MI. Glycosylated gold nanoparticle libraries for label-free multiplexed lectin biosensing. J Mater Chem B 2016; 4:3046-3053. [PMID: 27162639 PMCID: PMC4859411 DOI: 10.1039/c5tb01994j] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 10/26/2015] [Indexed: 11/21/2022]
Abstract
Glycan/lectin interactions drive a wide range of recognition and signal transduction processes within nature. However, their measurement is complicated or limited by the analytical tools available. Most technologies require fluorescently labelled proteins (e.g. microarrays) or expensive infrastructure (such as surface plasmon resonance). This also limits their application in biosensing, especially for low-resource settings, where detection of pathogens based on glycan binding could speed up diagnosis. Here we employ a library-oriented approach to immobilise a range of monosaccharides onto polymer-stabilised gold nanoparticles to enable rapid and high-throughput evaluation of their binding specificities with a panel of lectins. The red to blue colour shift upon gold nanoparticle aggregation is used as the output, removing the need for labelled protein, enabling compatibility with 96-well microplates. Furthermore, we demonstrate the use of a flatbed scanner (or digital camera) to extract biophysical data, ensuring that only minimal resources are required. Finally, linear discriminant analysis is employed to demonstrate how the glyconanoparticles can be applied as a multiplexed biosensor capable of identifying pathogenic lectins without the need for any infrastructure and overcoming some of the issues of lectin promiscuity.
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Affiliation(s)
- Sarah-Jane Richards
- Department of Chemistry , University of Warwick , Coventry , CV4 7AL , UK . ; Fax: +44 (0)2476 524112
| | - Lucienne Otten
- Department of Chemistry , University of Warwick , Coventry , CV4 7AL , UK . ; Fax: +44 (0)2476 524112
| | - Matthew I. Gibson
- Department of Chemistry , University of Warwick , Coventry , CV4 7AL , UK . ; Fax: +44 (0)2476 524112
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Eris D, Preston RC, Scharenberg M, Hulliger F, Abgottspon D, Pang L, Jiang X, Schwardt O, Ernst B. The Conformational Variability of FimH: Which Conformation Represents the Therapeutic Target? Chembiochem 2016; 17:1012-20. [PMID: 26991759 DOI: 10.1002/cbic.201600066] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Indexed: 12/21/2022]
Abstract
FimH is a bacterial lectin found at the tips of type 1 pili of uropathogenic Escherichia coli (UPEC). It mediates shear-enhanced adhesion to mannosylated surfaces. Binding of UPEC to urothelial cells initiates the infection cycle leading to urinary tract infections (UTIs). Antiadhesive glycomimetics based on α-d-mannopyranose offer an attractive alternative to the conventional antibiotic treatment because they do not induce a selection pressure and are therefore expected to have a reduced resistance potential. Genetic variation of the fimH gene in clinically isolated UPEC has been associated with distinct mannose binding phenotypes. For this reason, we investigated the mannose binding characteristics of four FimH variants with mannose-based ligands under static and hydrodynamic conditions. The selected FimH variants showed individually different binding behavior under both sets of conditions as a result of the conformational variability of FimH. Clinically relevant FimH variants typically exist in a dynamic conformational equilibrium. Additionally, we evaluated inhibitory potencies of four FimH antagonists representing different structural classes. Inhibitory potencies of three of the tested antagonists were dependent on the binding phenotype and hence on the conformational equilibrium of the FimH variant. However, the squarate derivative was the notable exception and inhibited FimH variants irrespective of their binding phenotype. Information on antagonist affinities towards various FimH variants has remained largely unconsidered despite being essential for successful antiadhesion therapy.
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Affiliation(s)
- Deniz Eris
- Department of Pharmaceutical Sciences, Institute of Molecular Pharmacy, Pharmacenter, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Roland C Preston
- Department of Pharmaceutical Sciences, Institute of Molecular Pharmacy, Pharmacenter, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Meike Scharenberg
- Department of Pharmaceutical Sciences, Institute of Molecular Pharmacy, Pharmacenter, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Fabian Hulliger
- Department of Pharmaceutical Sciences, Institute of Molecular Pharmacy, Pharmacenter, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Daniela Abgottspon
- Department of Pharmaceutical Sciences, Institute of Molecular Pharmacy, Pharmacenter, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Lijuan Pang
- Department of Pharmaceutical Sciences, Institute of Molecular Pharmacy, Pharmacenter, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Xiaohua Jiang
- Department of Pharmaceutical Sciences, Institute of Molecular Pharmacy, Pharmacenter, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Oliver Schwardt
- Department of Pharmaceutical Sciences, Institute of Molecular Pharmacy, Pharmacenter, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Beat Ernst
- Department of Pharmaceutical Sciences, Institute of Molecular Pharmacy, Pharmacenter, Klingelbergstrasse 50, 4056, Basel, Switzerland.
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Szunerits S, Barras A, Boukherroub R. Antibacterial Applications of Nanodiamonds. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:413. [PMID: 27077871 PMCID: PMC4847075 DOI: 10.3390/ijerph13040413] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 02/25/2016] [Accepted: 02/29/2016] [Indexed: 12/15/2022]
Abstract
Bacterial infectious diseases, sharing clinical characteristics such as chronic inflammation and tissue damage, pose a major threat to human health. The steady increase of multidrug-resistant bacteria infections adds up to the current problems modern healthcare is facing. The treatment of bacterial infections with multi-resistant germs is very difficult, as the development of new antimicrobial drugs is hardly catching up with the development of antibiotic resistant pathogens. These and other considerations have generated an increased interest in the development of viable alternatives to antibiotics. A promising strategy is the use of nanomaterials with antibacterial character and of nanostructures displaying anti-adhesive activity against biofilms. Glycan-modified nanodiamonds (NDs) revealed themselves to be of great promise as useful nanostructures for combating microbial infections. This review summarizes the current efforts in the synthesis of glycan-modified ND particles and evaluation of their antibacterial and anti-biofilm activities.
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Affiliation(s)
- Sabine Szunerits
- Institute of Electronics, Microelectronics and Nanotechnology (IEMN), UMR-CNRS 8520, University Lille 1, Avenue Poincaré-BP 60069, 59652 Villeneuve d'Ascq Cedex, France.
| | - Alexandre Barras
- Institute of Electronics, Microelectronics and Nanotechnology (IEMN), UMR-CNRS 8520, University Lille 1, Avenue Poincaré-BP 60069, 59652 Villeneuve d'Ascq Cedex, France.
| | - Rabah Boukherroub
- Institute of Electronics, Microelectronics and Nanotechnology (IEMN), UMR-CNRS 8520, University Lille 1, Avenue Poincaré-BP 60069, 59652 Villeneuve d'Ascq Cedex, France.
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68
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Alvarez Dorta D, Sivignon A, Chalopin T, Dumych TI, Roos G, Bilyy RO, Deniaud D, Krammer EM, de Ruyck J, Lensink MF, Bouckaert J, Barnich N, Gouin SG. The Antiadhesive Strategy in Crohn's Disease: Orally Active Mannosides to Decolonize Pathogenic Escherichia coli from the Gut. Chembiochem 2016; 17:936-52. [PMID: 26946458 DOI: 10.1002/cbic.201600018] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Indexed: 11/07/2022]
Abstract
Blocking the adherence of bacteria to cells is an attractive complementary approach to current antibiotic treatments, which are faced with increasing resistance. This strategy has been particularly studied in the context of urinary tract infections (UTIs), in which the adhesion of pathogenic Escherichia coli strains to uroepithelial cells is prevented by blocking the FimH adhesin expressed at the tips of bacteria organelles called fimbriae. Recently, we extended the antiadhesive concept, showing that potent FimH antagonists can block the attachment of adherent-invasive E. coli (AIEC) colonizing the intestinal mucosa of patients with Crohn's disease (CD). In this work, we designed a small library of analogues of heptyl mannoside (HM), a previously identified nanomolar FimH inhibitor, but one that displays poor antiadhesive effects in vivo. The anomeric oxygen atom was replaced by a sulfur or a methylene group to prevent hydrolysis by intestinal glycosidases, and chemical groups were attached at the end of the alkyl tail. Importantly, a lead compound was shown to reduce AIEC levels in the feces and in the colonic and ileal mucosa after oral administration (10 mg kg(-1) ) in a transgenic mouse model of CD. The compound showed a low bioavailability, preferable in this instance, thus suggesting the possibility of setting up an innovative antiadhesive therapy, based on the water-soluble and non-cytotoxic FimH antagonists developed here, for the CD subpopulation in which AIEC plays a key role.
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Affiliation(s)
- Dimitri Alvarez Dorta
- LUNAM Université, CEISAM, Chimie et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, 2, rue de la Houssinière, BP 92208, 44322, Nantes Cedex 3, France
| | - Adeline Sivignon
- Clermont Université, UMR 1071 Inserm/Université d'Auvergne, 63000, Clermont-Ferrand, France
| | - Thibaut Chalopin
- LUNAM Université, CEISAM, Chimie et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, 2, rue de la Houssinière, BP 92208, 44322, Nantes Cedex 3, France
| | - Tetiana I Dumych
- Univ. Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, 59000, Lille, France
| | - Goedele Roos
- Structure and Function of Biological Membranes, Université Libre de Bruxelles, Boulevard du Triomphe, 1050, Brussels, Belgium
| | - Rostyslav O Bilyy
- Danylo Halytsky Lviv National Medical University, Pekarska Str. 69, 79010, Lviv, Ukraine
| | - David Deniaud
- LUNAM Université, CEISAM, Chimie et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, 2, rue de la Houssinière, BP 92208, 44322, Nantes Cedex 3, France
| | - Eva-Maria Krammer
- Univ. Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, 59000, Lille, France
| | - Jérome de Ruyck
- Univ. Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, 59000, Lille, France
| | - Marc F Lensink
- Univ. Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, 59000, Lille, France
| | - Julie Bouckaert
- Univ. Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, 59000, Lille, France
| | - Nicolas Barnich
- Clermont Université, UMR 1071 Inserm/Université d'Auvergne, 63000, Clermont-Ferrand, France
| | - Sébastien G Gouin
- LUNAM Université, CEISAM, Chimie et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR CNRS 6230, 2, rue de la Houssinière, BP 92208, 44322, Nantes Cedex 3, France.
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69
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Kovač V, Ribić R, Peroković VP, Tomić S, Barišić L. Synthesis, spectral characterization and inhibitory potency of ferrocene-containing mannosides towards type 1 fimbriatedEscherichia coli. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Veronika Kovač
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology; University of Zagreb; Pierottijeva 6 Zagreb Croatia
| | - Rosana Ribić
- Department of Chemistry, Faculty of Science; University of Zagreb; Horvatovac 102a Zagreb Croatia
| | - Vesna Petrović Peroković
- Department of Chemistry, Faculty of Science; University of Zagreb; Horvatovac 102a Zagreb Croatia
| | - Srđanka Tomić
- Department of Chemistry, Faculty of Science; University of Zagreb; Horvatovac 102a Zagreb Croatia
| | - Lidija Barišić
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology; University of Zagreb; Pierottijeva 6 Zagreb Croatia
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Jarvis C, Han Z, Kalas V, Klein R, Pinkner JS, Ford B, Binkley J, Cusumano CK, Cusumano Z, Mydock-McGrane L, Hultgren SJ, Janetka JW. Antivirulence Isoquinolone Mannosides: Optimization of the Biaryl Aglycone for FimH Lectin Binding Affinity and Efficacy in the Treatment of Chronic UTI. ChemMedChem 2016; 11:367-73. [PMID: 26812660 DOI: 10.1002/cmdc.201600006] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Indexed: 12/26/2022]
Abstract
Uropathogenic E. coli (UPEC) employ the mannose-binding adhesin FimH to colonize the bladder epithelium during urinary tract infection (UTI). Previously reported FimH antagonists exhibit good potency and efficacy, but low bioavailability and a short half-life in vivo. In a rational design strategy, we obtained an X-ray structure of lead mannosides and then designed mannosides with improved drug-like properties. We show that cyclizing the carboxamide onto the biphenyl B-ring aglycone of biphenyl mannosides into a fused heterocyclic ring, generates new biaryl mannosides such as isoquinolone 22 (2-methyl-4-(1-oxo-1,2-dihydroisoquinolin-7-yl)phenyl α-d-mannopyranoside) with enhanced potency and in vivo efficacy resulting from increased oral bioavailability. N-Substitution of the isoquinolone aglycone with various functionalities produced a new potent subseries of FimH antagonists. All analogues of the subseries have higher FimH binding affinity than unsubstituted lead 22, as determined by thermal shift differential scanning fluorimetry assay. Mannosides with pyridyl substitution on the isoquinolone group inhibit bacteria-mediated hemagglutination and prevent biofilm formation by UPEC with single-digit nanomolar potency, which is unprecedented for any FimH antagonists or any other antivirulence compounds reported to date.
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Affiliation(s)
- Cassie Jarvis
- Washington University School of Medicine, Department of Biochemistry and Molecular Biophysics, 660 S. Euclid Ave., St. Louis, MO, 63110, USA
| | - Zhenfu Han
- Washington University School of Medicine, Department of Biochemistry and Molecular Biophysics, 660 S. Euclid Ave., St. Louis, MO, 63110, USA
| | - Vasilios Kalas
- Washington University School of Medicine, Department of Molecular Microbiology, 660 S. Euclid Ave., St. Louis, MO, 63110, USA
| | - Roger Klein
- Washington University School of Medicine, Department of Molecular Microbiology, 660 S. Euclid Ave., St. Louis, MO, 63110, USA
| | - Jerome S Pinkner
- Washington University School of Medicine, Department of Molecular Microbiology, 660 S. Euclid Ave., St. Louis, MO, 63110, USA
| | - Bradley Ford
- Washington University School of Medicine, Department of Molecular Microbiology, 660 S. Euclid Ave., St. Louis, MO, 63110, USA
| | - Jana Binkley
- Washington University School of Medicine, Department of Molecular Microbiology, 660 S. Euclid Ave., St. Louis, MO, 63110, USA
| | - Corinne K Cusumano
- Washington University School of Medicine, Department of Molecular Microbiology, 660 S. Euclid Ave., St. Louis, MO, 63110, USA
| | - Zachary Cusumano
- Fimbrion Therapeutics Inc., 4041 Forest Park Ave., St. Louis, MO, 63108, USA
| | | | - Scott J Hultgren
- Washington University School of Medicine, Department of Molecular Microbiology, 660 S. Euclid Ave., St. Louis, MO, 63110, USA. .,Washington University School of Medicine, Center for Women's Infectious Disease Research (cWIDR), 660 S. Euclid Ave., St. Louis, MO, 63110, USA.
| | - James W Janetka
- Washington University School of Medicine, Department of Biochemistry and Molecular Biophysics, 660 S. Euclid Ave., St. Louis, MO, 63110, USA. .,Washington University School of Medicine, Center for Women's Infectious Disease Research (cWIDR), 660 S. Euclid Ave., St. Louis, MO, 63110, USA.
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71
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Stauffert F, Bodlenner A, Nguyet Trinh TM, García-Moreno MI, Ortiz Mellet C, Nierengarten JF, Compain P. Understanding multivalent effects in glycosidase inhibition using C-glycoside click clusters as molecular probes. NEW J CHEM 2016. [DOI: 10.1039/c6nj01311b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Multivalent C-glycosides based on C60 or β-cyclodextrin cores were designed to probe the influence of inhitopes in glycosidase binding events.
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Affiliation(s)
- Fabien Stauffert
- Laboratoire de Synthèse Organique et Molécules Bioactives (SYBIO)
- Université de Strasbourg/CNRS (UMR 7509)
- Ecole Européenne de Chimie
- Polymères et Matériaux (ECPM)
- 67087 Strasbourg Cedex 2
| | - Anne Bodlenner
- Laboratoire de Synthèse Organique et Molécules Bioactives (SYBIO)
- Université de Strasbourg/CNRS (UMR 7509)
- Ecole Européenne de Chimie
- Polymères et Matériaux (ECPM)
- 67087 Strasbourg Cedex 2
| | - Thi Minh Nguyet Trinh
- Laboratoire de Chimie des Matériaux Moléculaires
- Université de Strasbourg et CNRS (UMR 7509)
- Ecole Européenne de Chimie
- Polymères et Matériaux
- 67087 Strasbourg Cedex 2
| | - M. Isabel García-Moreno
- Departamento de Química Orgánica
- Facultad de Química
- Universidad de Sevilla
- Profesor García González 1
- Sevilla
| | - Carmen Ortiz Mellet
- Departamento de Química Orgánica
- Facultad de Química
- Universidad de Sevilla
- Profesor García González 1
- Sevilla
| | - Jean-François Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires
- Université de Strasbourg et CNRS (UMR 7509)
- Ecole Européenne de Chimie
- Polymères et Matériaux
- 67087 Strasbourg Cedex 2
| | - Philippe Compain
- Laboratoire de Synthèse Organique et Molécules Bioactives (SYBIO)
- Université de Strasbourg/CNRS (UMR 7509)
- Ecole Européenne de Chimie
- Polymères et Matériaux (ECPM)
- 67087 Strasbourg Cedex 2
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Möckl L, Müller A, Bräuchle C, Lindhorst TK. Switching first contact: photocontrol of E. coli adhesion to human cells. Chem Commun (Camb) 2016; 52:1254-7. [DOI: 10.1039/c5cc08884d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
First contact between bacterial and target cells can be photocontrolled by E/Z isomerisation of azobenzene glycosides, employed in metabolic engineering.
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Affiliation(s)
- L. Möckl
- Department of Physical Chemistry
- Ludwig Maximilian University of Munich
- D-81377 Munich
- Germany
| | - A. Müller
- Otto Diels Institute of Organic Chemistry
- Christiana Albertina University of Kiel
- D-24118 Kiel
- Germany
| | - C. Bräuchle
- Department of Physical Chemistry
- Ludwig Maximilian University of Munich
- D-81377 Munich
- Germany
| | - T. K. Lindhorst
- Otto Diels Institute of Organic Chemistry
- Christiana Albertina University of Kiel
- D-24118 Kiel
- Germany
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73
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Cid Martín JJ, Assali M, Fernández-García E, Valdivia V, Sánchez-Fernández EM, Garcia Fernández JM, Wellinger RE, Fernández I, Khiar N. Tuning of glyconanomaterial shape and size for selective bacterial cell agglutination. J Mater Chem B 2016; 4:2028-2037. [DOI: 10.1039/c5tb02488a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Acting as veritable glue, 1D-coated mannose carbon nanotubes efficiently and selectively regulate the agglutination and proliferation of the enterobacteriaEscherichia colitype 1 fimbriae, much better than the mannose coated 3D-micelles.
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Affiliation(s)
- J. J. Cid Martín
- Asymmetric Synthesis and Functional Nanosystems Group, Instituto de Investigaciones Químicas (IIQ)
- CSIC and Universidad de Sevilla
- Seville
- Spain
| | - M. Assali
- Asymmetric Synthesis and Functional Nanosystems Group, Instituto de Investigaciones Químicas (IIQ)
- CSIC and Universidad de Sevilla
- Seville
- Spain
| | - E. Fernández-García
- Miochondrial Plasticity and Replication Laboratory
- Andalusian Center for Molecular Biology and Regenerative Medicine (CABIMER)
- Seville
- Spain
| | - V. Valdivia
- Asymmetric Synthesis and Functional Nanosystems Group, Instituto de Investigaciones Químicas (IIQ)
- CSIC and Universidad de Sevilla
- Seville
- Spain
- Departamento de Química Orgánica y Farmacéutica
| | | | - J. M. Garcia Fernández
- Asymmetric Synthesis and Functional Nanosystems Group, Instituto de Investigaciones Químicas (IIQ)
- CSIC and Universidad de Sevilla
- Seville
- Spain
| | - R. E. Wellinger
- Miochondrial Plasticity and Replication Laboratory
- Andalusian Center for Molecular Biology and Regenerative Medicine (CABIMER)
- Seville
- Spain
| | - I. Fernández
- Departamento de Química Orgánica y Farmacéutica
- Universidad de Sevilla
- 41012 Seville
- Spain
| | - N. Khiar
- Asymmetric Synthesis and Functional Nanosystems Group, Instituto de Investigaciones Químicas (IIQ)
- CSIC and Universidad de Sevilla
- Seville
- Spain
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74
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Chalopin T, Alvarez Dorta D, Sivignon A, Caudan M, Dumych TI, Bilyy RO, Deniaud D, Barnich N, Bouckaert J, Gouin SG. Second generation of thiazolylmannosides, FimH antagonists for E. coli-induced Crohn's disease. Org Biomol Chem 2016; 14:3913-25. [DOI: 10.1039/c6ob00424e] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chemical stability of potentE. colianti-adhesives was improved by substitution of the anomeric nitrogen by short linkers.
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Affiliation(s)
- T. Chalopin
- LUNAM Université
- CEISAM
- Chimie Et Interdisciplinarité
- Synthèse
- Analyse
| | - D. Alvarez Dorta
- LUNAM Université
- CEISAM
- Chimie Et Interdisciplinarité
- Synthèse
- Analyse
| | - A. Sivignon
- Clermont Université
- UMR 1071 Inserm/Université d'Auvergne
- 63000 Clermont-Ferrand
- France
| | - M. Caudan
- LUNAM Université
- CEISAM
- Chimie Et Interdisciplinarité
- Synthèse
- Analyse
| | - T. I. Dumych
- Unité de Glycobiologie Structurale et Fonctionnelle (UGSF)
- UMR 8576 du CNRS
- F-59655 Villeneuve d'Ascq Cedex
- France
| | - R. O. Bilyy
- Danylo Halytsky Lviv National Medical University
- Lviv
- Ukraine
| | - D. Deniaud
- LUNAM Université
- CEISAM
- Chimie Et Interdisciplinarité
- Synthèse
- Analyse
| | - N. Barnich
- Clermont Université
- UMR 1071 Inserm/Université d'Auvergne
- 63000 Clermont-Ferrand
- France
| | - J. Bouckaert
- Unité de Glycobiologie Structurale et Fonctionnelle (UGSF)
- UMR 8576 du CNRS
- F-59655 Villeneuve d'Ascq Cedex
- France
| | - S. G. Gouin
- LUNAM Université
- CEISAM
- Chimie Et Interdisciplinarité
- Synthèse
- Analyse
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75
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Vincent SP, Buffet K, Nierengarten I, Imberty A, Nierengarten JF. Biologically Active Heteroglycoclusters Constructed on a Pillar[5]arene-Containing [2]Rotaxane Scaffold. Chemistry 2015; 22:88-92. [PMID: 26467313 PMCID: PMC4832831 DOI: 10.1002/chem.201504110] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Indexed: 11/29/2022]
Abstract
A synthetic approach combining recent concepts for the preparation of multifunctional nanomolecules (click chemistry on multifunctional scaffolds) with supramolecular chemistry (self‐assembly to prepare rotaxanes) gave easy access to a large variety of sophisticated [2]rotaxane heteroglycoclusters. Specifically, compounds combining galactose and fucose have been prepared to target the two bacterial lectins (LecA and LecB) from the opportunistic pathogen Pseudomonas aeruginosa.
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Affiliation(s)
- Stéphane P Vincent
- University of Namur (UNamur), Académie Louvain, Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000 Namur (Belgium).
| | - Kevin Buffet
- University of Namur (UNamur), Académie Louvain, Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000 Namur (Belgium)
| | - Iwona Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires, Université de Strasbourg et CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 rue Becquerel, 67087 Strasbourg Cedex 2 (France)
| | - Anne Imberty
- CERMAV (UPR5301), CNRS and Université Grenoble Alpes, BP 53, 38041, Grenoble (France).
| | - Jean-François Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires, Université de Strasbourg et CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 rue Becquerel, 67087 Strasbourg Cedex 2 (France).
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76
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Lepage ML, Schneider JP, Bodlenner A, Compain P. Toward a Molecular Lego Approach for the Diversity-Oriented Synthesis of Cyclodextrin Analogues Designed as Scaffolds for Multivalent Systems. J Org Chem 2015; 80:10719-33. [DOI: 10.1021/acs.joc.5b01938] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Mathieu L. Lepage
- Laboratoire
de Synthèse Organique et Molécules Bioactives, Université de Strasbourg/CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg, France
| | - Jérémy P. Schneider
- Laboratoire
de Synthèse Organique et Molécules Bioactives, Université de Strasbourg/CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg, France
| | - Anne Bodlenner
- Laboratoire
de Synthèse Organique et Molécules Bioactives, Université de Strasbourg/CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg, France
| | - Philippe Compain
- Laboratoire
de Synthèse Organique et Molécules Bioactives, Université de Strasbourg/CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg, France
- Institut Universitaire de France, 103 Bd Saint-Michel, 75005 Paris, France
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77
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A metal free aqueous route to 1,5-disubstituted 1,2,3-triazolylated monofuranosides and difuranosides. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.08.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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78
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Abellán-Flos M, Tanç M, Supuran CT, Vincent SP. Multimeric xanthates as carbonic anhydrase inhibitors. J Enzyme Inhib Med Chem 2015; 31:946-52. [DOI: 10.3109/14756366.2015.1072177] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Affiliation(s)
- Marta Abellán-Flos
- Laboratoire de Chimie Bio-Organique, Département de Chimie, Académie Louvain, University of Namur (UNamur), Namur, Belgium and
| | - Muhammet Tanç
- Dipartimento Neurofarba, Sezione di Scienze Farmaceutiche e Nutraceutiche, Università degli Studi di Firenze, Florence, Italy
| | - Claudiu T. Supuran
- Dipartimento Neurofarba, Sezione di Scienze Farmaceutiche e Nutraceutiche, Università degli Studi di Firenze, Florence, Italy
| | - Stéphane P. Vincent
- Laboratoire de Chimie Bio-Organique, Département de Chimie, Académie Louvain, University of Namur (UNamur), Namur, Belgium and
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79
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Abstract
The article reviews the significant contributions to, and the present status of, applications of computational methods for the characterization and prediction of protein-carbohydrate interactions. After a presentation of the specific features of carbohydrate modeling, along with a brief description of the experimental data and general features of carbohydrate-protein interactions, the survey provides a thorough coverage of the available computational methods and tools. At the quantum-mechanical level, the use of both molecular orbitals and density-functional theory is critically assessed. These are followed by a presentation and critical evaluation of the applications of semiempirical and empirical methods: QM/MM, molecular dynamics, free-energy calculations, metadynamics, molecular robotics, and others. The usefulness of molecular docking in structural glycobiology is evaluated by considering recent docking- validation studies on a range of protein targets. The range of applications of these theoretical methods provides insights into the structural, energetic, and mechanistic facets that occur in the course of the recognition processes. Selected examples are provided to exemplify the usefulness and the present limitations of these computational methods in their ability to assist in elucidation of the structural basis underlying the diverse function and biological roles of carbohydrates in their dialogue with proteins. These test cases cover the field of both carbohydrate biosynthesis and glycosyltransferases, as well as glycoside hydrolases. The phenomenon of (macro)molecular recognition is illustrated for the interactions of carbohydrates with such proteins as lectins, monoclonal antibodies, GAG-binding proteins, porins, and viruses.
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Affiliation(s)
- Serge Pérez
- Department of Molecular Pharmacochemistry, CNRS, University Grenoble-Alpes, Grenoble, France.
| | - Igor Tvaroška
- Department of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic; Department of Chemistry, Faculty of Natural Sciences, Constantine The Philosopher University, Nitra, Slovak Republic.
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80
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Achazi AJ, Mollenhauer D, Paulus B. First principle investigation of the linker length effects on the thermodynamics of divalent pseudorotaxanes. Beilstein J Org Chem 2015; 11:687-92. [PMID: 26124872 PMCID: PMC4464336 DOI: 10.3762/bjoc.11.78] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 04/29/2015] [Indexed: 01/07/2023] Open
Abstract
The Gibbs energies of association (Gibbs free (binding) energies) for divalent crown-8/ammonium pseudorotaxanes are determined by investigating the influence of different linkers onto the binding. Calculations are performed with density functional theory including dispersion corrections. The translational, rotational and vibrational contributions are taken into account and solvation effects including counter ions are investigated by applying the COSMO-RS method, which is based on a continuum solvation model. The calculated energies agree well with the experimentally determined ones. The shortest investigated linker shows an enhanced binding strength due to electronic effects, namely the dispersion interaction between the linkers from the guest and the host. For the longer linkers this ideal packing is not possible due to steric hindrance.
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Affiliation(s)
- Andreas J Achazi
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Doreen Mollenhauer
- Physikalisch-Chemisches Institut, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 58, 35392 Gießen, Germany
| | - Beate Paulus
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
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81
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Gloe TE, Stamer I, Hojnik C, Wrodnigg TM, Lindhorst TK. Are D-manno-configured Amadori products ligands of the bacterial lectin FimH? Beilstein J Org Chem 2015. [PMID: 26199665 PMCID: PMC4505182 DOI: 10.3762/bjoc.11.123] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The Amadori rearrangement was employed for the synthesis of C-glycosyl-type D-mannoside analogues, namely 1-propargylamino- and 1-phenylamino-1-deoxy-α-D-manno-heptopyranose. They were investigated as ligands of type 1-fimbriated E. coli bacteria by means of molecular docking and bacterial adhesion studies. It turns out that Amadori rearrangement products have a limited activity as inhibitors of bacterial adhesion because the β-C-glycosidically linked aglycone considerably hampers complexation within the carbohydrate binding site of the type 1-fimbrial lectin FimH.
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Affiliation(s)
- Tobias-Elias Gloe
- Christiana Albertina University of Kiel, Otto Diels Institute of Organic Chemistry, Otto-Hahn-Platz 3/4, D-24118 Kiel, Germany,
| | - Insa Stamer
- Christiana Albertina University of Kiel, Otto Diels Institute of Organic Chemistry, Otto-Hahn-Platz 3/4, D-24118 Kiel, Germany,
| | - Cornelia Hojnik
- Glycogroup, Institute of Organic Chemistry, Technical University Graz, Stremayrgasse 9, A-8010 Graz, Austria
| | - Tanja M Wrodnigg
- Glycogroup, Institute of Organic Chemistry, Technical University Graz, Stremayrgasse 9, A-8010 Graz, Austria
| | - Thisbe K Lindhorst
- Christiana Albertina University of Kiel, Otto Diels Institute of Organic Chemistry, Otto-Hahn-Platz 3/4, D-24118 Kiel, Germany,
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82
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Fessele C, Wachtler S, Chandrasekaran V, Stiller C, Lindhorst TK, Krueger A. Thiourea-Bridged Nanodiamond Glycoconjugates as Inhibitors of Bacterial Adhesion. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500532] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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83
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Addressing the global need to combat multidrug resistance: carbohydrates may hold the key. Future Med Chem 2015; 6:1539-43. [PMID: 25367388 DOI: 10.4155/fmc.14.109] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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84
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Fiege B, Rabbani S, Preston RC, Jakob RP, Zihlmann P, Schwardt O, Jiang X, Maier T, Ernst B. The tyrosine gate of the bacterial lectin FimH: a conformational analysis by NMR spectroscopy and X-ray crystallography. Chembiochem 2015; 16:1235-46. [PMID: 25940742 DOI: 10.1002/cbic.201402714] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Indexed: 12/22/2022]
Abstract
Urinary tract infections caused by uropathogenic E. coli are among the most prevalent infectious diseases. The mannose-specific lectin FimH mediates the adhesion of the bacteria to the urothelium, thus enabling host cell invasion and recurrent infections. An attractive alternative to antibiotic treatment is the development of FimH antagonists that mimic the physiological ligand. A large variety of candidate drugs have been developed and characterized by means of in vitro studies and animal models. Here we present the X-ray co-crystal structures of FimH with members of four antagonist classes. In three of these cases no structural data had previously been available. We used NMR spectroscopy to characterize FimH-antagonist interactions further by chemical shift perturbation. The analysis allowed a clear determination of the conformation of the tyrosine gate motif that is crucial for the interaction with aglycone moieties and was not obvious from X-ray structural data alone. Finally, ITC experiments provided insight into the thermodynamics of antagonist binding. In conjunction with the structural information from X-ray and NMR experiments the results provide a mechanism for the often-observed enthalpy-entropy compensation of FimH antagonists that plays a role in fine-tuning of the interaction.
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Affiliation(s)
- Brigitte Fiege
- Institute of Molecular Pharmacy, University of Basel, Klingelbergstrasse 50, 4056 Basel (Switzerland)
| | - Said Rabbani
- Institute of Molecular Pharmacy, University of Basel, Klingelbergstrasse 50, 4056 Basel (Switzerland)
| | - Roland C Preston
- Institute of Molecular Pharmacy, University of Basel, Klingelbergstrasse 50, 4056 Basel (Switzerland)
| | - Roman P Jakob
- Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, 4056 Basel (Switzerland)
| | - Pascal Zihlmann
- Institute of Molecular Pharmacy, University of Basel, Klingelbergstrasse 50, 4056 Basel (Switzerland)
| | - Oliver Schwardt
- Institute of Molecular Pharmacy, University of Basel, Klingelbergstrasse 50, 4056 Basel (Switzerland)
| | - Xiaohua Jiang
- Institute of Molecular Pharmacy, University of Basel, Klingelbergstrasse 50, 4056 Basel (Switzerland)
| | - Timm Maier
- Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, 4056 Basel (Switzerland).
| | - Beat Ernst
- Institute of Molecular Pharmacy, University of Basel, Klingelbergstrasse 50, 4056 Basel (Switzerland).
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85
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Daskhan GC, Berthet N, Thomas B, Fiore M, Renaudet O. Multivalent glycocyclopeptides: toward nano-sized glycostructures. Carbohydr Res 2015; 405:13-22. [DOI: 10.1016/j.carres.2014.07.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 07/18/2014] [Accepted: 07/21/2014] [Indexed: 10/25/2022]
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86
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Inhibition of Pasteurella multocida Adhesion to Rabbit Respiratory Epithelium Using Lectins. Vet Med Int 2015; 2015:365428. [PMID: 25810949 PMCID: PMC4354970 DOI: 10.1155/2015/365428] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 02/07/2015] [Accepted: 02/09/2015] [Indexed: 12/25/2022] Open
Abstract
This study aimed to evaluate the ability of a panel of lectins to inhibit the ability of Pasteurella multocida to adhere to and affect the rabbit respiratory epithelium. Nasal septa from rabbit fetuses were cultured with various lectins before the addition of P. multocida. The percentage of bacteria adhering to the epithelium was evaluated semiquantitatively by indirect immunoperoxidase (IIP) staining. The goblet cells (GCs) were counted in semithin sections stained with toluidine blue and served as the main morphological criterion to evaluate the inhibitory effect of the lectins. The lectins PNA, WGA, RCA120, and DBA significantly inhibited the adhesion of P. multocida to the ciliated epithelium (P < 0.05) and prevented the pathogen-induced increase in the number of GCs (P < 0.05) compared with those of positive control tissues. In addition, VVA, SJA, UEA I, DSL, SBA, and ECL significantly inhibited the increase in GCs compared with that of the control tissues. The results suggest that less aggressive therapeutic strategies, such as treatment with lectins, may represent alternative approaches to control bacterial respiratory infections.
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87
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Khanal M, Larsonneur F, Raks V, Barras A, Baumann JS, Martin FA, Boukherroub R, Ghigo JM, Ortiz Mellet C, Zaitsev V, Garcia Fernandez JM, Beloin C, Siriwardena A, Szunerits S. Inhibition of type 1 fimbriae-mediated Escherichia coli adhesion and biofilm formation by trimeric cluster thiomannosides conjugated to diamond nanoparticles. NANOSCALE 2015; 7:2325-2335. [PMID: 25559389 DOI: 10.1039/c4nr05906a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recent advances in nanotechnology have seen the development of a number of microbiocidal and/or anti-adhesive nanoparticles displaying activity against biofilms. In this work, trimeric thiomannoside clusters conjugated to nanodiamond particles (ND) were targeted for investigation. NDs have attracted attention as a biocompatible nanomaterial and we were curious to see whether the high mannose glycotope density obtained upon grouping monosaccharide units in triads might lead to the corresponding ND-conjugates behaving as effective inhibitors of E. coli type 1 fimbriae-mediated adhesion as well as of biofilm formation. The required trimeric thiosugar clusters were obtained through a convenient thiol-ene "click" strategy and were subsequently conjugated to alkynyl-functionalized NDs using a Cu(I)-catalysed "click" reaction. We demonstrated that the tri-thiomannoside cluster-conjugated NDs (ND-Man3) show potent inhibition of type 1 fimbriae-mediated E. coli adhesion to yeast and T24 bladder cells as well as of biofilm formation. The biofilm disrupting effects demonstrated here have only rarely been reported in the past for analogues featuring such simple glycosidic motifs. Moreover, the finding that the tri-thiomannoside cluster (Man3N3) is itself a relatively efficient inhibitor, even when not conjugated to any ND edifice, suggests that alternative mono- or multivalent sugar-derived analogues might also be usefully explored for E. coli-mediated biofilm disrupting properties.
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Affiliation(s)
- Manakamana Khanal
- Institut de Recherche Interdisciplinaire (IRI, USR CNRS 3078), Université Lille 1, Parc de la Haute Borne, 50 Avenue de Halley, BP 70478, 59658 Villeneuve d'Ascq, France.
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88
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Lindhorst TK, Dubber M. Octopus glycosides: multivalent molecular platforms for testing carbohydrate recognition and bacterial adhesion. Carbohydr Res 2015; 403:90-7. [DOI: 10.1016/j.carres.2014.06.032] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Revised: 06/26/2014] [Accepted: 06/30/2014] [Indexed: 01/28/2023]
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89
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Turcheniuk K, Hage CH, Spadavecchia J, Serrano AY, Larroulet I, Pesquera A, Zurutuza A, Pisfil MG, Héliot L, Boukaert J, Boukherroub R, Szunerits S. Plasmonic photothermal destruction of uropathogenic E. coli with reduced graphene oxide and core/shell nanocomposites of gold nanorods/reduced graphene oxide. J Mater Chem B 2015; 3:375-386. [DOI: 10.1039/c4tb01760a] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The selective photothermal destruction of E. coli is shown.
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Affiliation(s)
- Kostiantyn Turcheniuk
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Charles-Henri Hage
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Jolanda Spadavecchia
- Laboratoire de Réactivité de Surfaces
- UMR CNRS 7197
- Université Pierre & Marie Curie – Paris VI
- 94200 Ivry-sur-Seine
- France
| | | | | | | | | | - Mariano Gonzalez Pisfil
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Laurent Héliot
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Julie Boukaert
- Unité de Glycobiologie Structurale et Fonctionnelle (UGSF)
- Université Lille 1
- CNRS UMR 8576
- 59655 Villeneuve d'Ascq
- France
| | - Rabah Boukherroub
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Sabine Szunerits
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
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90
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Twibanire JDK, Paul NK, Grindley TB. Synthesis of novel types of polyester glycodendrimers as potential inhibitors of urinary tract infections. NEW J CHEM 2015. [DOI: 10.1039/c4nj00992d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Syntheses of highly mannosylated polyester dendrimers with 2, 4, 8, and 16 α-d-mannopyranose residues on their peripheries connected by different linker arms are presented.
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Affiliation(s)
| | - Nawal K. Paul
- Department of Chemistry
- Dalhousie University
- Halifax
- Canada
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91
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Buffet K, Gillon E, Holler M, Nierengarten JF, Imberty A, Vincent SP. Fucofullerenes as tight ligands of RSL and LecB, two bacterial lectins. Org Biomol Chem 2015; 13:6482-92. [DOI: 10.1039/c5ob00689a] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A series of water-soluble glycofullerenes containing up to 24 fucose residues were tested against the two bacterial lectins LecB and RSL, and C60(E)12 bearing 24 fucose residues appeared to be the best known inhibitor of both lectins to date.
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Affiliation(s)
- Kevin Buffet
- University of Namur (UNamur)
- Académie Louvain
- Département de Chimie
- Laboratoire de Chimie Bio-Organique
- B-5000 Namur
| | - Emilie Gillon
- CERMAV - CNRS (affiliated to Université Grenoble Alpes and ICMG)
- Grenoble
- France
| | - Michel Holler
- Laboratoire de Chimie des Matériaux Moléculaires
- Université de Strasbourg et CNRS (UMR 7509)
- Ecole Européenne de Chimie
- Polymères et Matériaux (ECPM)
- 67087 Strasbourg Cedex 2
| | - Jean-François Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires
- Université de Strasbourg et CNRS (UMR 7509)
- Ecole Européenne de Chimie
- Polymères et Matériaux (ECPM)
- 67087 Strasbourg Cedex 2
| | - Anne Imberty
- CERMAV - CNRS (affiliated to Université Grenoble Alpes and ICMG)
- Grenoble
- France
| | - Stéphane P. Vincent
- University of Namur (UNamur)
- Académie Louvain
- Département de Chimie
- Laboratoire de Chimie Bio-Organique
- B-5000 Namur
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92
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Abellán-Flos M, Tanç M, Supuran CT, Vincent SP. Exploring carbonic anhydrase inhibition with multimeric coumarins displayed on a fullerene scaffold. Org Biomol Chem 2015; 13:7445-51. [DOI: 10.1039/c5ob01005e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This study reports the first synthesis of multimeric suicide inhibitors of carbonic anhydrases.
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Affiliation(s)
- Marta Abellán-Flos
- University of Namur (UNamur)
- Académie Louvain
- Département de Chimie
- Laboratoire de Chimie Bio-Organique
- B-5000 Namur
| | - Muhammet Tanç
- Università degli Studi di Firenze
- Polo Scientifico
- Laboratorio di Chimica Bioinorganica
- Florence
- Italy
| | - Claudiu T. Supuran
- Università degli Studi di Firenze
- Polo Scientifico
- Laboratorio di Chimica Bioinorganica
- Florence
- Italy
| | - Stéphane P. Vincent
- University of Namur (UNamur)
- Académie Louvain
- Département de Chimie
- Laboratoire de Chimie Bio-Organique
- B-5000 Namur
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93
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Cecioni S, Imberty A, Vidal S. Glycomimetics versus Multivalent Glycoconjugates for the Design of High Affinity Lectin Ligands. Chem Rev 2014; 115:525-61. [DOI: 10.1021/cr500303t] [Citation(s) in RCA: 381] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Samy Cecioni
- CERMAV, Université Grenoble Alpes and CNRS, BP 53, F-38041 Grenoble Cedex 9, France
- Institut
de Chimie et Biochimie Moléculaires et Supramoléculaires,
Laboratoire de Chimie Organique 2 - Glycochimie, UMR 5246, Université Lyon 1 and CNRS, 43 Boulevard du 11 Novembre 1918, F-69622, Villeurbanne, France
| | - Anne Imberty
- CERMAV, Université Grenoble Alpes and CNRS, BP 53, F-38041 Grenoble Cedex 9, France
| | - Sébastien Vidal
- Institut
de Chimie et Biochimie Moléculaires et Supramoléculaires,
Laboratoire de Chimie Organique 2 - Glycochimie, UMR 5246, Université Lyon 1 and CNRS, 43 Boulevard du 11 Novembre 1918, F-69622, Villeurbanne, France
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94
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Weber T, Chandrasekaran V, Stamer I, Thygesen MB, Terfort A, Lindhorst TK. Schaltung bakterieller Adhäsion auf glycosylierten Oberflächen durch reversible Reorientierung der Kohlenhydratliganden. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409808] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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95
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Switching of Bacterial Adhesion to a Glycosylated Surface by Reversible Reorientation of the Carbohydrate Ligand. Angew Chem Int Ed Engl 2014; 53:14583-6. [DOI: 10.1002/anie.201409808] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Indexed: 01/08/2023]
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96
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Richards SJ, Gibson MI. Optimization of the Polymer Coating for Glycosylated Gold Nanoparticle Biosensors to Ensure Stability and Rapid Optical Readouts. ACS Macro Lett 2014; 3:1004-1008. [PMID: 35610783 DOI: 10.1021/mz5004882] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The development of new analytical tools to probe pathogenic infection processes and as point-of-care biosensors is crucial to combat the spread of infectious diseases or to detect biological warfare agents. Glycosylated gold nanoparticles that change color due to lectin (carbohydrate-binding protein) mediated aggregation may find use as biosensors but require a polymer coating between the particle surface and sugar to ensure stability in complex media. Here, RAFT polymerization is employed to generate glycosylated polymers to coat gold nanoparticles. Rather than being a passive component, it is shown here that the polymer coating has to be precisely tuned to achieve a balance between saline (steric) stability and speed of the readout. If the polymer is too long it can prevent or slow aggregation and hence lead to a poor readout in sensing assays. The optimized glyco-nanoparticles are also demonstrated to be useful for rapid detection of a ricin surrogate.
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Affiliation(s)
- Sarah-Jane Richards
- Department
of Chemistry and ‡Warwick Medical School, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Matthew I. Gibson
- Department
of Chemistry and ‡Warwick Medical School, University of Warwick, Coventry, CV4 7AL, United Kingdom
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97
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Chandrasekaran V, Johannes E, Kobarg H, Sönnichsen FD, Lindhorst TK. Synthesis and photochromic properties of configurationally varied azobenzene glycosides. ChemistryOpen 2014; 3:99-108. [PMID: 25050228 PMCID: PMC4101725 DOI: 10.1002/open.201402010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Indexed: 01/08/2023] Open
Abstract
Spatial orientation of carbohydrates is a meaningful parameter in carbohydrate recognition processes. To vary orientation of sugars with temporal and spatial resolution, photosensitive glycoconjugates with favorable photochromic properties appear to be opportune. Here, a series of azobenzene glycosides were synthesized, employing glycoside synthesis and Mills reaction, to allow “switching” of carbohydrate orientation by reversible E/Z isomerization of the azobenzene N=N double bond. Their photochromic properties were tested and effects of azobenzene substitution as well as the effect of anomeric configuration and the orientation of the sugars 2-hydroxy group were evaluated.
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Affiliation(s)
- Vijayanand Chandrasekaran
- Otto Diels Institute of Organic Chemistry Christiana Albertina University of Kiel Otto-Hahn-Platz 3/4, 24118 Kiel (Germany) E-mail:
| | - Eugen Johannes
- Otto Diels Institute of Organic Chemistry Christiana Albertina University of Kiel Otto-Hahn-Platz 3/4, 24118 Kiel (Germany) E-mail:
| | - Hauke Kobarg
- Otto Diels Institute of Organic Chemistry Christiana Albertina University of Kiel Otto-Hahn-Platz 3/4, 24118 Kiel (Germany) E-mail:
| | - Frank D Sönnichsen
- Otto Diels Institute of Organic Chemistry Christiana Albertina University of Kiel Otto-Hahn-Platz 3/4, 24118 Kiel (Germany) E-mail:
| | - Thisbe K Lindhorst
- Otto Diels Institute of Organic Chemistry Christiana Albertina University of Kiel Otto-Hahn-Platz 3/4, 24118 Kiel (Germany) E-mail:
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98
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Car Ž, Hrenar T, Petrović Peroković V, Ribić R, Seničar M, Tomić S. MannosylatedN-Aryl Substituted 3-Hydroxypyridine-4-Ones: Synthesis, Hemagglutination Inhibitory Properties, and Molecular Modeling. Chem Biol Drug Des 2014; 84:393-401. [DOI: 10.1111/cbdd.12329] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 02/19/2014] [Accepted: 03/12/2014] [Indexed: 01/30/2023]
Affiliation(s)
- Željka Car
- Department of Chemistry; Faculty of Science; University of Zagreb; Horvatovac 102a HR-10000 Zagreb Croatia
| | - Tomica Hrenar
- Department of Chemistry; Faculty of Science; University of Zagreb; Horvatovac 102a HR-10000 Zagreb Croatia
| | - Vesna Petrović Peroković
- Department of Chemistry; Faculty of Science; University of Zagreb; Horvatovac 102a HR-10000 Zagreb Croatia
| | - Rosana Ribić
- Department of Chemistry; Faculty of Science; University of Zagreb; Horvatovac 102a HR-10000 Zagreb Croatia
| | - Mateja Seničar
- Department of Chemistry; Faculty of Science; University of Zagreb; Horvatovac 102a HR-10000 Zagreb Croatia
| | - Srđanka Tomić
- Department of Chemistry; Faculty of Science; University of Zagreb; Horvatovac 102a HR-10000 Zagreb Croatia
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99
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Compain P, Bodlenner A. The Multivalent Effect in Glycosidase Inhibition: A New, Rapidly Emerging Topic in Glycoscience. Chembiochem 2014; 15:1239-51. [DOI: 10.1002/cbic.201402026] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Indexed: 11/07/2022]
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100
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Kaufmann L, Traulsen NL, Springer A, Schröder HV, Mäkelä T, Rissanen K, Schalley CA. Evaluation of multivalency as an organization principle for the efficient synthesis of doubly and triply threaded amide rotaxanes. Org Chem Front 2014. [DOI: 10.1039/c4qo00077c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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