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Johansson E, Caraballo R, Elofsson M. Synthesis of 4- O-Alkylated N-Acetylneuraminic Acid Derivatives. J Org Chem 2021; 86:9145-9154. [PMID: 34138565 PMCID: PMC8279483 DOI: 10.1021/acs.joc.1c00235] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
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The synthesis of
4-O-alkyl analogues of N-acetylneuraminic
acid (Neu5Ac) and the scope of the reaction
are described. Activated alkyl halides and sulfonates and primary
alkyl iodides give products in useful yields. The utility of the methodology
is exemplified using a thiophenyl Neu5Ac building block to synthesize
a 4-O-alkyl DANA analogue. These results expand the
toolbox of Neu5Ac chemistry with value in drug discovery and for the
design of novel tools to study the biology of Neu5Ac lectins.
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Affiliation(s)
- Emil Johansson
- Department of Chemistry, Umeå University, Umeå SE90187, Sweden
| | - Rémi Caraballo
- Department of Chemistry, Umeå University, Umeå SE90187, Sweden
| | - Mikael Elofsson
- Department of Chemistry, Umeå University, Umeå SE90187, Sweden
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2
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Nowack L, Teschers CS, Albrecht S, Gilmour R. Oligodendroglial glycolipids in (Re)myelination: implications for multiple sclerosis research. Nat Prod Rep 2021; 38:890-904. [PMID: 33575689 DOI: 10.1039/d0np00093k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Covering: up to 2020 This short review surveys aspects of glycolipid-based natural products and their biological relevance in multiple sclerosis (MS). The role of isolated gangliosides in disease models is discussed together with an overview of ganglioside-inspired small molecule drugs and imaging probes. The discussion is extended to neurodegeneration in a more general context and addresses the need for more efficient synthetic methods to generate (glyco)structures that are of therapeutic relevance.
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Affiliation(s)
- Luise Nowack
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany. and Institute of Neuropathology, University Hospital Münster, Pottkamp 2, 48149 Münster, Germany.
| | - Charlotte S Teschers
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany.
| | - Stefanie Albrecht
- Institute of Neuropathology, University Hospital Münster, Pottkamp 2, 48149 Münster, Germany.
| | - Ryan Gilmour
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany.
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3
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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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4
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Biophysical characterization of lectin–glycan interactions for therapeutics, vaccines and targeted drug-delivery. Future Med Chem 2014; 6:2113-29. [DOI: 10.4155/fmc.14.130] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Lectin–glycan interactions play a role in biological processes, host–pathogen interactions and in disease. A more detailed understanding of these interactions is not only useful for the elucidation of their biological function but can also be applied in immunology, drug development and delivery and diagnostics. We review some commonly used biophysical techniques for studying lectin–glycan interactions; namely: frontal affinity chromatography, glycan/lectin microarray, surface plasmon resonance, electrochemical impedance spectroscopy, isothermal titration calorimetry, fluorescent assays, enzyme linked lectin sorbent assay and saturation transfer difference nuclear magnetic resonance spectroscopy. Each method is evaluated on efficiency, cost and throughput. We also consider the advantages and limitations of each technique and provide examples of their application in biology, drug discovery and delivery, immunology, glycoprofiling and biosensing.
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5
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Prescher H, Schweizer A, Kuhfeldt E, Nitschke L, Brossmer R. Discovery of multifold modified sialosides as human CD22/Siglec-2 ligands with nanomolar activity on B-cells. ACS Chem Biol 2014; 9:1444-50. [PMID: 24807582 DOI: 10.1021/cb400952v] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Sialic acids are abundant in higher domains of life and lectins recognizing sialosaccharides are heavily involved in the regulation of the human immune system. Modified sialosides are useful tools to explore the functions of those lectins, especially members of the Siglec (sialic acid binding immunoglobulin like lectin) family. Here we report design, synthesis, and affinity evaluation of novel sialoside classes with combined modification at positions 2, 4, and 9 or 2, 3, 4, and 9 of the sialic acid scaffold as human CD22 (human Siglec-2) ligands. They display up to 7.5 × 10(5)-fold increased affinity over αMe Neu5Ac (the minimal Siglec ligand). CD22 is a negative regulating coreceptor of the B-cell receptor (BCR). In vitro experiments with a human B-lymphocyte cell line showed functional blocking of CD22 upon B-cell receptor (BCR) stimulation in the presence of nanomolar concentrations of the novel ligands. The observed increased Ca(2+) response corresponds to enhanced cell activation, providing an opportunity to therapeutically modulate B-lymphocyte responses, e.g., in immune deficiencies and infections.
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Affiliation(s)
| | - Astrid Schweizer
- Chair
of Genetics, Department of Biology, University of Erlangen, 91058 Erlangen,Germany
| | | | - Lars Nitschke
- Chair
of Genetics, Department of Biology, University of Erlangen, 91058 Erlangen,Germany
| | - Reinhard Brossmer
- Biochemistry
Center, University of Heidelberg, 69120 Heidelberg, Germany
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6
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Scharenberg M, Jiang X, Pang L, Navarra G, Rabbani S, Binder F, Schwardt O, Ernst B. Kinetic Properties of Carbohydrate-Lectin Interactions: FimH Antagonists. ChemMedChem 2013; 9:78-83. [DOI: 10.1002/cmdc.201300349] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Indexed: 11/12/2022]
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7
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Egger J, Weckerle C, Cutting B, Schwardt O, Rabbani S, Lemme K, Ernst B. Nanomolar E-selectin antagonists with prolonged half-lives by a fragment-based approach. J Am Chem Soc 2013; 135:9820-8. [PMID: 23742188 DOI: 10.1021/ja4029582] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Selectins, a family of C-type lectins, play a key role in inflammatory diseases (e.g., asthma and arthritis). However, the only millimolar affinity of sialyl Lewis(x) (sLe(x)), which is the common tetrasaccharide epitope of all physiological selectin ligands, has been a major obstacle to the development of selectin antagonists for therapeutic applications. In a fragment-based approach guided by NMR, ligands binding to a second site in close proximity to a sLe(x) mimic were identified. A library of antagonists obtained by connecting the sLe(x) mimic to the best second-site ligand via triazole linkers of different lengths was evaluated by surface plasmon resonance. Detailed analysis of the five most promising candidates revealed antagonists with K(D) values ranging from 30 to 89 nM. In contrast to carbohydrate-lectin complexes with typical half-lives (t(1/2)) in the range of one second or even less, these fragment-based selectin antagonists show t1/2 of several minutes. They exhibit a promising starting point for the development of novel anti-inflammatory drugs.
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Affiliation(s)
- Jonas Egger
- Institute of Molecular Pharmacy, Pharmacenter, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland
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8
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Kelm S, Madge P, Islam T, Bennett R, Koliwer-Brandl H, Waespy M, von Itzstein M, Haselhorst T. C-4 modified sialosides enhance binding to Siglec-2 (CD22): towards potent Siglec inhibitors for immunoglycotherapy. Angew Chem Int Ed Engl 2013; 52:3616-20. [PMID: 23440868 DOI: 10.1002/anie.201207267] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2012] [Revised: 11/26/2012] [Indexed: 12/12/2022]
Affiliation(s)
- Sørge Kelm
- Centre for Biomolecular Interactions Bremen, Department of Biology and Chemistry, University of Bremen, 28334 Bremen, Germany.
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Kelm S, Madge P, Islam T, Bennett R, Koliwer-Brandl H, Waespy M, von Itzstein M, Haselhorst T. C-4-Modifikation von Sialosiden verstärkt die Bindung an Siglec-2 (CD22) - auf dem Weg zu potenten Siglec-Inhibitoren für eine Immunglykotherapie. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201207267] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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10
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Schwardt O, Kelm S, Ernst B. SIGLEC-4 (MAG) Antagonists: From the Natural Carbohydrate Epitope to Glycomimetics. Top Curr Chem (Cham) 2013; 367:151-200. [DOI: 10.1007/128_2013_498] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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11
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Pang L, Kleeb S, Lemme K, Rabbani S, Scharenberg M, Zalewski A, Schädler F, Schwardt O, Ernst B. FimH antagonists: structure-activity and structure-property relationships for biphenyl α-D-mannopyranosides. ChemMedChem 2012; 7:1404-22. [PMID: 22644941 DOI: 10.1002/cmdc.201200125] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 04/27/2012] [Indexed: 11/09/2022]
Abstract
Urinary tract infections (UTIs) are caused primarily by uropathogenic Escherichia coli (UPEC), which encode filamentous surface-adhesive organelles called type 1 pili. FimH is located at the tips of these pili. The initial attachment of UPEC to host cells is mediated by the interaction of the carbohydrate recognition domain (CRD) of FimH with oligomannosides on urothelial cells. Blocking these lectins with carbohydrates or analogues thereof prevents bacterial adhesion to host cells and therefore offers a potential therapeutic approach for prevention and/or treatment of UTIs. Although numerous FimH antagonists have been developed so far, few of them meet the requirement for clinical application due to poor pharmacokinetics. Additionally, the binding mode of an antagonist to the CRD of FimH can switch from an in-docking mode to an out-docking mode, depending on the structure of the antagonist. In this communication, biphenyl α-D-mannosides were modified to improve their binding affinity, to explore their binding mode, and to optimize their pharmacokinetic properties. The inhibitory potential of the FimH antagonists was measured in a cell-free competitive binding assay, a cell-based flow cytometry assay, and by isothermal titration calorimetry. Furthermore, pharmacokinetic properties such as log D, solubility, and membrane permeation were analyzed. As a result, a structure-activity and structure-property relationships were established for a series of biphenyl α-D-mannosides.
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Affiliation(s)
- Lijuan Pang
- Institute of Molecular Pharmacy, Pharmacenter, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
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12
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Mesch S, Lemme K, Wittwer M, Koliwer-Brandl H, Schwardt O, Kelm S, Ernst B. From a Library of MAG Antagonists to Nanomolar CD22 Ligands. ChemMedChem 2011; 7:134-43. [DOI: 10.1002/cmdc.201100407] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Indexed: 12/14/2022]
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13
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Zeng Y, Rademacher C, Nycholat CM, Futakawa S, Lemme K, Ernst B, Paulson JC. High affinity sialoside ligands of myelin associated glycoprotein. Bioorg Med Chem Lett 2011; 21:5045-9. [PMID: 21561770 DOI: 10.1016/j.bmcl.2011.04.068] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Revised: 04/13/2011] [Accepted: 04/15/2011] [Indexed: 01/19/2023]
Abstract
Myelin associated glycoprotein (Siglec-4) is a myelin adhesion receptor, that is, well established for its role as an inhibitor of axonal outgrowth in nerve injury, mediated by binding to sialic acid containing ligands on the axonal membrane. Because disruption of myelin-ligand interactions promotes axon outgrowth, we have sought to develop potent ligand based inhibitors using natural ligands as scaffolds. Although natural ligands of MAG are glycolipids terminating in the sequence NeuAcα2-3Galβ1-3(±NeuAcα2-6)GalNAcβ-R, we previously established that synthetic O-linked glycoprotein glycans with the same sequence α-linked to Thr exhibited ∼1000-fold increased affinity (∼1μM). Attempts to increase potency by introducing a benzoylamide substituent at C-9 of the α2-3 sialic acid afforded only a two-fold increase, instead of increases of >100-fold observed for other sialoside ligands of MAG. Surprisingly, however, introduction of a 9-N-fluoro-benzoyl substituent on the α2-6 sialic acid increased affinity 80-fold, resulting in a potent inhibitor with a K(d) of 15nM. Docking this ligand to a model of MAG based on known crystal structures of other siglecs suggests that the Thr positions the glycan such that aryl substitution of the α2-3 sialic acid produces a steric clash with the GalNAc, while attaching an aryl substituent to the other sialic acid positions the substituent near a hydrophobic pocket that accounts to the increase in affinity.
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Affiliation(s)
- Ying Zeng
- Department of Physiological Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037, United States
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14
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Obermajer N, Sattin S, Colombo C, Bruno M, Svajger U, Anderluh M, Bernardi A. Design, synthesis and activity evaluation of mannose-based DC-SIGN antagonists. Mol Divers 2010; 15:347-60. [PMID: 21076980 PMCID: PMC7089406 DOI: 10.1007/s11030-010-9285-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 10/18/2010] [Indexed: 01/12/2023]
Abstract
In this article, we describe the design, synthesis and activity evaluation of glycomimetic DC-SIGN antagonists, that use a mannose residue to anchor to the protein carbohydrate recognition domain (CRD). The molecules were designed from the structure of the known pseudo-mannobioside antagonist 1, by including additional hydrophobic groups, which were expected to engage lipophilic areas of DC-SIGN CRD. The results demonstrate that the synthesized compounds potently inhibit DC-SIGN-mediated adhesion to mannan coated plates. Additionally, in silico docking studies were performed to rationalize the results and to suggest further optimization.
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Affiliation(s)
- Nataša Obermajer
- Department of Biotechnology, Jozef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
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