1
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Differential recognition of Haemophilus influenzae whole bacterial cells and isolated lipooligosaccharides by galactose-specific lectins. Sci Rep 2018; 8:16292. [PMID: 30389954 PMCID: PMC6215012 DOI: 10.1038/s41598-018-34383-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 10/18/2018] [Indexed: 12/22/2022] Open
Abstract
Bacterial surfaces are decorated with carbohydrate structures that may serve as ligands for host receptors. Based on their ability to recognize specific sugar epitopes, plant lectins are extensively used for bacteria typing. We previously observed that the galactose-specific agglutinins from Ricinus communis (RCA) and Viscum album (VAA) exhibited differential binding to nontypeable Haemophilus influenzae (NTHi) clinical isolates, their binding being distinctly affected by truncation of the lipooligosaccharide (LOS). Here, we examined their binding to the structurally similar LOS molecules isolated from strains NTHi375 and RdKW20, using microarray binding assays, saturation transfer difference NMR, and molecular dynamics simulations. RCA bound the LOSRdKW20 glycoform displaying terminal Galβ(1,4)Glcβ, whereas VAA recognized the Galα(1,4)Galβ(1,4)Glcβ epitope in LOSNTHi375 but not in LOSRdKW20, unveiling a different presentation. Binding assays to whole bacterial cells were consistent with LOSNTHi375 serving as ligand for VAA, and also suggested recognition of the glycoprotein HMW1. Regarding RCA, comparable binding to NTHi375 and RdKW20 cells was observed. Interestingly, an increase in LOSNTHi375 abundance or expression of HMW1 in RdKW20 impaired RCA binding. Overall, the results revealed that, besides the LOS, other carbohydrate structures on the bacterial surface serve as lectin ligands, and highlighted the impact of the specific display of cell surface components on lectin binding.
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2
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Krishnan BP, Raghu S, Mukherjee S, Sureshan KM. Organogel-assisted topochemical synthesis of multivalent glyco-polymer for high-affinity lectin binding. Chem Commun (Camb) 2018; 52:14089-14092. [PMID: 27853762 DOI: 10.1039/c6cc07993h] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An organogelator, 2,4-undeca-diynyl-4',6'-O-benzylidene-β-d-galactopyranoside, which aligns its diacetylene upon gelation, has been synthesized. UV irradiation of its gel resulted in topochemical polymerization of the gelator forming polydiacetylene (PDA). We have used this gel-state reaction for the synthesis of surface-immobilized multi-valent glycoclusters, which showed 1000-fold enhanced binding, compared to monomers, with various galactose-binding lectins.
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Affiliation(s)
- Baiju P Krishnan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695016, India.
| | - Sreedevi Raghu
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695016, India.
| | - Somnath Mukherjee
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695016, India.
| | - Kana M Sureshan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695016, India.
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3
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Lainé D, Denavit V, Giguère D. Synthesis of Protected 3-Deoxy-3-fluoro- and 4-Deoxy-4-fluoro-d-galactopyranosides from Levoglucosan. J Org Chem 2017; 82:4986-4992. [DOI: 10.1021/acs.joc.7b00543] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Danny Lainé
- PROTEO, RQRM, Département
de Chimie, Université Laval, 1045 av. De la Médecine, Québec City, Québec, Canada G1V 0A6
| | - Vincent Denavit
- PROTEO, RQRM, Département
de Chimie, Université Laval, 1045 av. De la Médecine, Québec City, Québec, Canada G1V 0A6
| | - Denis Giguère
- PROTEO, RQRM, Département
de Chimie, Université Laval, 1045 av. De la Médecine, Québec City, Québec, Canada G1V 0A6
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4
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Kalograiaki I, Euba B, Proverbio D, Campanero-Rhodes MA, Aastrup T, Garmendia J, Solís D. Combined Bacteria Microarray and Quartz Crystal Microbalance Approach for Exploring Glycosignatures of Nontypeable Haemophilus influenzae and Recognition by Host Lectins. Anal Chem 2016; 88:5950-7. [PMID: 27176788 DOI: 10.1021/acs.analchem.6b00905] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Recognition of bacterial surface epitopes by host receptors plays an important role in the infectious process and is intimately associated with bacterial virulence. Delineation of bacteria-host interactions commonly relies on the detection of binding events between purified bacteria- and host-target molecules. In this work, we describe a combined microarray and quartz crystal microbalance (QCM) approach for the analysis of carbohydrate-mediated interactions directly on the bacterial surface, thus preserving the native environment of the bacterial targets. Nontypeable Haemophilus influenzae (NTHi) was selected as a model pathogenic species not displaying a polysaccharide capsule or O-antigen-containing lipopolysaccharide, a trait commonly found in several important respiratory pathogens. Here, we demonstrate the usefulness of NTHi microarrays for exploring the presence of carbohydrate structures on the bacterial surface. Furthermore, the microarray approach is shown to be efficient for detecting strain-selective binding of three innate immune lectins, namely, surfactant protein D, human galectin-8, and Siglec-14, to different NTHi clinical isolates. In parallel, QCM bacteria-chips were developed for the analysis of lectin-binding kinetics and affinity. This novel QCM approach involves capture of NTHi on lectin-derivatized chips followed by formaldehyde fixation, rendering the bacteria an integrated part of the sensor chip, and subsequent binding assays with label-free lectins. The binding parameters obtained for selected NTHi-lectin pairs provide further insights into the interactions occurring at the bacterial surface.
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Affiliation(s)
- Ioanna Kalograiaki
- Instituto de Química Física Rocasolano, CSIC , Serrano 119, 28006 Madrid, Spain.,CIBER de Enfermedades Respiratorias (CIBERES) , Avda Monforte de Lemos 3-5, 28029 Madrid, Spain
| | - Begoña Euba
- CIBER de Enfermedades Respiratorias (CIBERES) , Avda Monforte de Lemos 3-5, 28029 Madrid, Spain.,Instituto de Agrobiotecnología , CSIC-UPNa-Gobierno Navarra, Avda Pamplona 123, 31192 Mutilva, Spain
| | | | - María A Campanero-Rhodes
- Instituto de Química Física Rocasolano, CSIC , Serrano 119, 28006 Madrid, Spain.,CIBER de Enfermedades Respiratorias (CIBERES) , Avda Monforte de Lemos 3-5, 28029 Madrid, Spain
| | | | - Junkal Garmendia
- CIBER de Enfermedades Respiratorias (CIBERES) , Avda Monforte de Lemos 3-5, 28029 Madrid, Spain.,Instituto de Agrobiotecnología , CSIC-UPNa-Gobierno Navarra, Avda Pamplona 123, 31192 Mutilva, Spain
| | - Dolores Solís
- Instituto de Química Física Rocasolano, CSIC , Serrano 119, 28006 Madrid, Spain.,CIBER de Enfermedades Respiratorias (CIBERES) , Avda Monforte de Lemos 3-5, 28029 Madrid, Spain
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5
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Srdic-Rajic T, Tisma-Miletic N, Cavic M, Kanjer K, Savikin K, Galun D, Konic-Ristic A, Zoranovic T. Sensitization of K562 Leukemia Cells to Doxorubicin by theViscum albumExtract. Phytother Res 2015; 30:485-95. [DOI: 10.1002/ptr.5554] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 11/02/2015] [Accepted: 11/25/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Tatjana Srdic-Rajic
- Department of Experimental Pharmacology; Institute for Oncology and Radiology of Serbia; Belgrade Serbia
| | - Nevena Tisma-Miletic
- Department of Experimental Pharmacology; Institute for Oncology and Radiology of Serbia; Belgrade Serbia
| | - Milena Cavic
- Department of Experimental Pharmacology; Institute for Oncology and Radiology of Serbia; Belgrade Serbia
| | - Ksenija Kanjer
- Department of Experimental Pharmacology; Institute for Oncology and Radiology of Serbia; Belgrade Serbia
| | - Katarina Savikin
- Institute for Medicinal Plant Research ‘Dr Josif Pančić’; Belgrade Serbia
| | - Danijel Galun
- University Clinic for Digestive Surgery; Clinical center Serbia; Belgrade Serbia
- Belgrade University Medical School; Belgrade Serbia
| | - Aleksandra Konic-Ristic
- Institute for Medical Research, Center of Research Excellence in Nutrition and Metabolism; Belgrade University; Belgrade Serbia
| | - Tamara Zoranovic
- Department of Experimental Pharmacology; Institute for Oncology and Radiology of Serbia; Belgrade Serbia
- Max Plank Institute for Infection Biology; Berlin Germany
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6
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Rauthu SR, Shiao TC, André S, Miller MC, Madej É, Mayo KH, Gabius HJ, Roy R. Defining the Potential of Aglycone Modifications for Affinity/Selectivity Enhancement against Medically Relevant Lectins: Synthesis, Activity Screening, and HSQC-Based NMR Analysis. Chembiochem 2014; 16:126-39. [DOI: 10.1002/cbic.201402474] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Indexed: 12/28/2022]
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7
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Percec V, Leowanawat P, Sun HJ, Kulikov O, Nusbaum CD, Tran TM, Bertin A, Wilson DA, Peterca M, Zhang S, Kamat NP, Vargo K, Moock D, Johnston ED, Hammer DA, Pochan DJ, Chen Y, Chabre YM, Shiao TC, Bergeron-Brlek M, André S, Roy R, Gabius HJ, Heiney PA. Modular synthesis of amphiphilic Janus glycodendrimers and their self-assembly into glycodendrimersomes and other complex architectures with bioactivity to biomedically relevant lectins. J Am Chem Soc 2013; 135:9055-77. [PMID: 23692629 DOI: 10.1021/ja403323y] [Citation(s) in RCA: 229] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The modular synthesis of 7 libraries containing 51 self-assembling amphiphilic Janus dendrimers with the monosaccharides D-mannose and D-galactose and the disaccharide D-lactose in their hydrophilic part is reported. These unprecedented sugar-containing dendrimers are named amphiphilic Janus glycodendrimers. Their self-assembly by simple injection of THF or ethanol solution into water or buffer and by hydration was analyzed by a combination of methods including dynamic light scattering, confocal microscopy, cryogenic transmission electron microscopy, Fourier transform analysis, and micropipet-aspiration experiments to assess mechanical properties. These libraries revealed a diversity of hard and soft assemblies, including unilamellar spherical, polygonal, and tubular vesicles denoted glycodendrimersomes, aggregates of Janus glycodendrimers and rodlike micelles named glycodendrimer aggregates and glycodendrimermicelles, cubosomes denoted glycodendrimercubosomes, and solid lamellae. These assemblies are stable over time in water and in buffer, exhibit narrow molecular-weight distribution, and display dimensions that are programmable by the concentration of the solution from which they are injected. This study elaborated the molecular principles leading to single-type soft glycodendrimersomes assembled from amphiphilic Janus glycodendrimers. The multivalency of glycodendrimersomes with different sizes and their ligand bioactivity were demonstrated by selective agglutination with a diversity of sugar-binding protein receptors such as the plant lectins concanavalin A and the highly toxic mistletoe Viscum album L. agglutinin, the bacterial lectin PA-IL from Pseudomonas aeruginosa, and, of special biomedical relevance, human adhesion/growth-regulatory galectin-3 and galectin-4. These results demonstrated the candidacy of glycodendrimersomes as new mimics of biological membranes with programmable glycan ligand presentations, as supramolecular lectin blockers, vaccines, and targeted delivery devices.
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Affiliation(s)
- Virgil Percec
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA.
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8
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Ardá A, Blasco P, Varón Silva D, Schubert V, André S, Bruix M, Cañada FJ, Gabius HJ, Unverzagt C, Jiménez-Barbero J. Molecular recognition of complex-type biantennary N-glycans by protein receptors: a three-dimensional view on epitope selection by NMR. J Am Chem Soc 2013; 135:2667-75. [PMID: 23360551 DOI: 10.1021/ja3104928] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The current surge in defining glycobiomarkers by applying lectins rekindles interest in definition of the sugar-binding sites of lectins at high resolution. Natural complex-type N-glycans can present more than one potential binding motif, posing the question of the actual mode of interaction when interpreting, for example, lectin array data. By strategically combining N-glycan preparation with saturation-transfer difference NMR and modeling, we illustrate that epitope recognition depends on the structural context of both the sugar and the lectin (here, wheat germ agglutinin and a single hevein domain) and cannot always be predicted from simplified model systems studied in the solid state. We also monitor branch-end substitutions by this strategy and describe a three-dimensional structure that accounts for the accommodation of the α2,6-sialylated terminus of a biantennary N-glycan by viscumin. In addition, we provide a structural explanation for the role of terminal α2,6-sialylation in precluding the interaction of natural N-glycans with lectin from Maackia amurensis . The approach described is thus capable of pinpointing lectin-binding motifs in natural N-glycans and providing detailed structural explanations for lectin selectivity.
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Affiliation(s)
- Ana Ardá
- Chemical and Physical Biology, Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain
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9
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Ekholm FS, Ardá A, Eklund P, André S, Gabius HJ, Jiménez-Barbero J, Leino R. Studies related to Norway spruce galactoglucomannans: chemical synthesis, conformation analysis, NMR spectroscopic characterization, and molecular recognition of model compounds. Chemistry 2012; 18:14392-405. [PMID: 23008171 DOI: 10.1002/chem.201200510] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 05/16/2012] [Indexed: 12/20/2022]
Abstract
Galactoglucomannan (GGM) is a polysaccharide mainly consisting of mannose, glucose, and galactose. GGM is the most abundant hemicellulose in the Norway spruce (Picea abies), but is also found in the cell wall of flax seeds, tobacco plants, and kiwifruit. Although several applications for GGM polysaccharides have been developed in pulp and paper manufacturing and the food and medical industries, attempts to synthesize and study distinct fragments of this polysaccharide have not been reported previously. Herein, the synthesis of one of the core trisaccharide units of GGM together with a less-abundant tetrasaccharide fragment is described. In addition, detailed NMR spectroscopic characterization of the model compounds, comparison of the spectral data with natural GGM, investigation of the acetyl-group migration phenomena that takes place in the polysaccharide by using small model compounds, and a binding study between the tetrasaccharide model fragment and a galactose-binding protein (the toxin viscumin) are reported.
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Affiliation(s)
- Filip S Ekholm
- Laboratory of Organic Chemistry, Åbo Akademi University, Piispankatu 8, 20500 Åbo, Finland
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10
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André S, Cañada FJ, Shiao TC, Largartera L, Diercks T, Bergeron-Brlek M, el Biari K, Papadopoulos A, Ribeiro JP, Touaibia M, Solís D, Menéndez M, Jiménez-Barbero J, Roy R, Gabius HJ. Fluorinated Carbohydrates as Lectin Ligands: Biorelevant Sensors with Capacity to Monitor Anomer Affinity in 19F-NMR-Based Inhibitor Screening. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200397] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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11
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Marcelo F, Cañada FJ, André S, Colombo C, Doro F, Gabius HJ, Bernardi A, Jiménez-Barbero J. α-N-Linked glycopeptides: conformational analysis and bioactivity as lectin ligands. Org Biomol Chem 2012; 10:5916-23. [DOI: 10.1039/c2ob07135e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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12
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André S, Jarikote DV, Yan D, Vincenz L, Wang GN, Kaltner H, Murphy PV, Gabius HJ. Synthesis of bivalent lactosides and their activity as sensors for differences between lectins in inter- and intrafamily comparisons. Bioorg Med Chem Lett 2012; 22:313-8. [DOI: 10.1016/j.bmcl.2011.11.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Revised: 11/01/2011] [Accepted: 11/02/2011] [Indexed: 02/02/2023]
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13
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Miller MC, Ribeiro JP, Roldós V, Martín-Santamaría S, Cañada FJ, Nesmelova IA, André S, Pang M, Klyosov AA, Baum LG, Jiménez-Barbero J, Gabius HJ, Mayo KH. Structural aspects of binding of α-linked digalactosides to human galectin-1. Glycobiology 2011; 21:1627-41. [PMID: 21712397 DOI: 10.1093/glycob/cwr083] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
By definition, adhesion/growth-regulatory galectins are known for their ability to bind β-galactosides such as Galβ(1 → 4)Glc (lactose). Indications for affinity of human galectin-1 to α-linked digalactosides pose questions on the interaction profile with such bound ligands and selection of the galactose moiety for CH-π stacking. These issues are resolved by a combination of (15)N-(1)H heteronuclear single quantum coherence (HSQC) chemical shift and saturation transfer difference nuclear magnetic resonance (STD NMR) epitope mappings with docking analysis, using the α(1 → 3/4)-linked digalactosides and also Galα(1 → 6)Glc (melibiose) as test compounds. The experimental part revealed interaction with the canonical lectin site, and this preferentially via the non-reducing-end galactose moiety. Low-energy conformers appear to be selected without notable distortion, as shown by molecular dynamics simulations. With the α(1 → 4) disaccharide, however, the typical CH-π interaction is significantly diminished, yet binding appears to be partially compensated for by hydrogen bonding. Overall, these findings reveal that the type of α-linkage in digalactosides has an impact on maintaining CH-π interactions and the pattern of hydrogen bonding, explaining preference for the α(1 → 3) linkage. Thus, this lectin is able to accommodate both α- and β-linked galactosides at the same site, with major contacts to the non-reducing-end sugar unit.
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Affiliation(s)
- Michelle C Miller
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota Health Sciences Center, 6-155 Jackson Hall, 321 Church Street, Minneapolis, MN 55455, USA
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14
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Martín-Santamaría S, André S, Buzamet E, Caraballo R, Fernández-Cureses G, Morando M, Ribeiro JP, Ramírez-Gualito K, de Pascual-Teresa B, Cañada FJ, Menéndez M, Ramström O, Jiménez-Barbero J, Solís D, Gabius HJ. Symmetric dithiodigalactoside: strategic combination of binding studies and detection of selectivity between a plant toxin and human lectins. Org Biomol Chem 2011; 9:5445-55. [PMID: 21660340 DOI: 10.1039/c0ob01235a] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Thioglycosides offer the advantage over O-glycosides to be resistant to hydrolysis. Based on initial evidence of this recognition ability for glycosyldisulfides by screening dynamic combinatorial libraries, we have now systematically studied dithiodigalactoside on a plant toxin (Viscum album agglutinin) and five human lectins (adhesion/growth-regulatory galectins with medical relevance e.g. in tumor progression and spread). Inhibition assays with surface-presented neoglycoprotein and in solution monitored by saturation transfer difference NMR spectroscopy, flanked by epitope mapping, as well as isothermal titration calorimetry revealed binding properties to VAA (K(a): 1560 ± 20 M(-1)). They were reflected by the structural model and the affinity on the level of toxin-exposed cells. In comparison, galectins were considerably less reactive, with intrafamily grading down to very minor reactivity for tandem-repeat-type galectins, as quantitated by radioassays for both domains of galectin-4. Model building indicated contact formation to be restricted to only one galactose moiety, in contrast to thiodigalactoside. The tested glycosyldisulfide exhibits selectivity between the plant toxin and the tested human lectins, and also between these proteins. Therefore, glycosyldisulfides have potential as chemical platform for inhibitor design.
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Affiliation(s)
- Sonsoles Martín-Santamaría
- Departamento de Química, Facultad de Farmacia, Universidad San Pablo CEU, Boadilla del Monte, 28668, Madrid, Spain
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André S, Grandjean C, Gautier FM, Bernardi S, Sansone F, Gabius HJ, Ungaro R. Combining carbohydrate substitutions at bioinspired positions with multivalent presentation towards optimising lectin inhibitors: case study with calixarenes. Chem Commun (Camb) 2011; 47:6126-8. [PMID: 21523264 DOI: 10.1039/c1cc11163a] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Carbohydrate derivatisation and glycocluster formation are both known to enhance avidity for lectin binding. Using a plant toxin and human adhesion/growth-regulatory lectins (inter- and intrafamily comparisons) the effect of their combination is examined. In detail, aromatic substituents were introduced at the 2-N or 3'-positions of N-acetyllactosamine and the products conjugated to two types of calix[n]arenes (n = 4, 6) via thiourea-linker chemistry.
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Affiliation(s)
- Sabine André
- Institut für Physiologische Chemie, Tierärztliche Fakultät, Ludwig-Maximilians-Universität, Veterinärstr. 13, 80539 München, Germany
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16
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Giguère D, André S, Bonin MA, Bellefleur MA, Provencal A, Cloutier P, Pucci B, Roy R, Gabius HJ. Inhibitory potential of chemical substitutions at bioinspired sites of β-D-galactopyranose on neoglycoprotein/cell surface binding of two classes of medically relevant lectins. Bioorg Med Chem 2011; 19:3280-7. [PMID: 21524586 DOI: 10.1016/j.bmc.2011.03.022] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 03/04/2011] [Accepted: 03/09/2011] [Indexed: 12/16/2022]
Abstract
Galactose is the key contact site for plant AB-toxins and the human adhesion/growth-regulatory galectins. Natural anomeric extensions and 3'-substitutions enhance its reactivity, thus prompting us to test the potential of respective chemical substitutions of galactose in the quest to develop potent inhibitors. Biochemical screening of a respective glycoside library with 60 substances in a solid-phase assay was followed by examining the compounds' activity to protect cells from lectin binding. By testing 32 anomeric extensions, 18 compounds with additional 3'-substitution, three lactosides and two Lewis-type trisaccharides rather mild effects compared to the common haptenic inhibitor lactose were detected in both assays. When using trivalent glycoclusters marked enhancements with 6- to 8-fold increases were revealed for the toxin and three of four tested galectins. Since the most potent compound and also 3'-substituted thiogalactosides reduced cell growth of a human tumor line at millimolar concentrations, biocompatible substitutions and scaffolds will be required for further developments. The synthesis of suitable glycoclusters, presenting headgroups which exploit differences in ligand selection in interlectin comparison to reduce cross-reactivity, and the documented strategic combination of initial biochemical screening with cell assays are considered instrumental to advance inhibitor design.
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Affiliation(s)
- Denis Giguère
- PharmaQAM, Department of Chemistry, Université du Québec à Montréal, Canada
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17
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Ribeiro JP, Carvalho DT, André S, Cañada FJ, Alves RJ, Gabius HJ, Jiménez-Barbero J. Towards sugar derivatives as toxin-blocking pharmaceuticals: STD NMR spectroscopy as versatile tool for affinity assessment in drug development. CR CHIM 2011. [DOI: 10.1016/j.crci.2010.03.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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18
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André S, Lahmann M, Gabius HJ, Oscarson S. Glycocluster design for improved avidity and selectivity in blocking human lectin/plant toxin binding to glycoproteins and cells. Mol Pharm 2010; 7:2270-9. [PMID: 21028902 DOI: 10.1021/mp1002416] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Blocking lectin/toxin binding to human cells by suitable inhibitors can therapeutically protect them from harmful effects. Clustered design of ligand presentation holds the promise of affinity increase relative to the free sugar and inherent selectivity among lectin targets. Using first a solid-phase assay with a glycoprotein presenting N-glycans as lectin-reactive probe, we assessed the inhibitory potency of bi- to tetravalent clusters on a plant toxin and three human adhesion/growth-regulatory lectins. Enhanced avidity relative to the free sugar was detected together with lectin-type selectivity. These effects were confirmed on the level of cells in vitro, also for two leguminous lectins. The lack of toxicity in cell proliferation assays excluded concerns to further work on these compounds. The given cluster design and the strategic combination of the two assay systems of increasing biorelevance will thus be helpful to take the next steps in drug development, e.g. tailoring the sugar headgroup.
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Affiliation(s)
- Sabine André
- Institut für Physiologische Chemie, Tierärztliche Fakultät, Ludwig-Maximilians-Universität, Veterinärstrasse 13, 80539 München, Germany
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Selenoglycosides in silico: ab initio-derived reparameterization of MM4, conformational analysis using histo-blood group ABH antigens and lectin docking as indication for potential of bioactivity. J Comput Aided Mol Des 2010; 24:1009-21. [PMID: 20976527 DOI: 10.1007/s10822-010-9392-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Accepted: 10/06/2010] [Indexed: 10/18/2022]
Abstract
The identification of glycan epitopes such as the histo-blood group ABH determinants as docking sites for bacterial/viral infections and signals in growth regulation fuels the interest to develop non-hydrolysable mimetics for therapeutic applications. Inevitably, the required substitution of the linkage oxygen atom will alter the derivative's topology. Our study addresses the question of the impact of substitution of oxygen by selenium. In order to characterize spatial parameters and flexibility of selenoglycosides, we first performed ab initio calculations on model compounds to refine the MM4 force field. The following application of the resulting MM4R version appears to reduce the difference to ab initio data when compared to using the MM4 estimator. Systematic conformational searches on the derivatives of histo-blood group ABH antigens revealed increased flexibility with acquisition of additional low-energy conformer(s), akin to the behavior of S-glycosides. Docking analysis using the Glide program for eight test cases indicated potential for bioactivity, giving further experimental investigation a clear direction to testing Se-glycosides as lectin ligands.
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Survey of the year 2008: applications of isothermal titration calorimetry. J Mol Recognit 2010; 23:395-413. [DOI: 10.1002/jmr.1025] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Ribeiro J, André S, Cañada FJ, Gabius HJ, Butera AP, Alves RJ, Jiménez-Barbero J. Lectin-Based Drug Design: Combined Strategy to Identify Lead Compounds using STD NMR Spectroscopy, Solid-Phase Assays and Cell Binding for a Plant Toxin Model. ChemMedChem 2010; 5:415-9, 314. [DOI: 10.1002/cmdc.200900476] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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André S, Giguère D, Dam TK, Brewer F, Gabius HJ, Roy R. Synthesis and screening of a small glycomimetic library for inhibitory activity on medically relevant galactoside-specific lectins in assays of increasing biorelevance. NEW J CHEM 2010. [DOI: 10.1039/c0nj00277a] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Jiménez-Barbero J, Dragoni E, Venturi C, Nannucci F, Ardá A, Fontanella M, André S, Cañada FJ, Gabius HJ, Nativi C. Alpha-O-linked glycopeptide mimetics: synthesis, conformation analysis, and interactions with viscumin, a galactoside-binding model lectin. Chemistry 2009; 15:10423-31. [PMID: 19746469 DOI: 10.1002/chem.200901077] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Efficient cycloaddition of a silylidene-protected galactal with a suitable heterodiene yielded the basis for a facile diastereoselective route to a glycopeptide-mimetic scaffold. Its carbohydrate part was further extended by beta1-3-linked galactosylation. The pyranose rings retain their (4)C(1) chair conformation, as shown by molecular modeling and NMR spectroscopy, and the typical exo-anomeric geometry was observed for the disaccharide. The expected bioactivity was ascertained by saturation-transfer-difference NMR spectroscopy by using the galactoside-specific plant toxin viscumin as a model lectin. The experimental part was complemented by molecular docking. The described synthetic route and the strategic combination of computational and experimental techniques to reveal conformational properties and bioactivity establish the prepared alpha-O-linked glycopeptide mimetics as promising candidates for further exploitation of this scaffold to give O-glycans for lectin blocking and vaccination.
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Affiliation(s)
- Jesús Jiménez-Barbero
- Chemical and Physical Biology, Centro de Investigaciones Biológicas, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain.
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Barrientos AG, Fuente JMDL, Jiménez M, Solís D, Cañada FJ, Martín-Lomas M, Penadés S. Modulating glycosidase degradation and lectin recognition of gold glyconanoparticles. Carbohydr Res 2009; 344:1474-8. [DOI: 10.1016/j.carres.2009.04.029] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2009] [Revised: 04/07/2009] [Accepted: 04/27/2009] [Indexed: 11/25/2022]
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