1
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Frank M, Kuhfeldt E, Cramer J, Watzl C, Prescher H. Synthesis and Binding Mode Predictions of Novel Siglec-7 Ligands. J Med Chem 2023; 66:14315-14334. [PMID: 37793071 DOI: 10.1021/acs.jmedchem.3c01349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
Siglec-7 regulates immune cell activity and is a promising target for immunomodulation. Here, we report the discovery of novel sialic acid derivatives binding to Siglec-7. Synthesis and affinity measurements are complemented by high-quality models of sialoside-Siglec-7 complexes based on molecular dynamics (MD) simulations on the microsecond time scale. We provide details for the predicted binding modes for the new ligands, e.g., that an extension of the carbon backbone leads to a different molecular interaction pattern with the receptor and the nearby water structure than found for known Siglec-7 ligands. Further on, we uncover some shortcomings of the GLYCAM06 and GAFF2 force fields when used for the simulation of sialoside-based glycomimetics. Our results open new opportunities for the rational design of Siglec-7 inhibitors. In addition, we provide strategies on how to use and visualize MD simulations to describe and investigate sialoside-Siglec complexes in general.
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Affiliation(s)
- Martin Frank
- Molecular Structure Analysis Core Facility-W160, German Cancer Research Center, 69120 Heidelberg, Germany
- Biognos AB, Generatorsgatan 1, 40274 Göteborg, Sweden
| | | | - Jonathan Cramer
- Institute for Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-University of Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Carsten Watzl
- Institute of Immunology, University of Heidelberg, 69120 Heidelberg, Germany
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2
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Feng Z, Feng X, Lu X. Bioinspired N-Oxide-Based Zwitterionic Polymer Brushes for Robust Fouling-Resistant Surfaces. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:7298-7308. [PMID: 37116217 DOI: 10.1021/acs.est.3c00128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Fouling-resistant surfaces are needed for various environmental applications. Inspired by superhydrophilic N-oxide-based osmolytes in saltwater fish, we demonstrate the use of a trimethylamine N-oxide (TMAO) analogue for constructing fouling-resistant surfaces. The readily synthesized N-oxide monomer of methacrylamide is grafted to filtration membrane surfaces by surface-initiated atom transfer radical polymerization (SI-ATRP). Successful grafting of the amine N-oxide brush layer as confirmed by material characterization endows the surface with increased hydrophilicity, reduced charge, and decreased roughness. Notably, the introduction of the N-oxide layer does not compromise transport properties, i.e., water permeability and water-salt selectivity. Moreover, the modified membrane exhibits improved antifouling properties with a lower flux decline (32.1%) and greater fouling reversibility (18.55%) than the control sample (45.4% flux decline and 3.26% fouling reversibility). We further evaluate foulant-membrane interaction using surface plasmon resonance (SPR) to relate the reduced fouling tendency to the synergic effects of surface characteristic changes after amine N-oxide modification. Our results demonstrate the promise and potential of the N-oxide-based polymer brushes for the design of fouling resistance surfaces for a variety of emerging environmental applications.
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Affiliation(s)
- Zimou Feng
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Xunda Feng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-Dimension Materials, and College of Materials Sciences and Engineering, Donghua University, Shanghai 201620, China
| | - Xinglin Lu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
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3
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Pons M, Perenon M, Bonnet H, Gillon E, Vallée C, Coche-Guérente L, Defrancq E, Spinelli N, Van der Heyden A, Dejeu J. Conformational transition in SPR experiments: impact of spacer length, immobilization mode and aptamer density on signal sign and amplitude. Analyst 2022; 147:4197-4205. [DOI: 10.1039/d2an00824f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The spacer length and immobilization mode impact the Surface plasmon resonance (SPR) signal and affinity measured for small target/aptamer recognition. The signal could be positive, negative or null explained by refractive index increment deviation.
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Affiliation(s)
- Marina Pons
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - Marine Perenon
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - Hugues Bonnet
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - Emilie Gillon
- Univ. Grenoble Alpes, CERMAV-CNRS, 601 rue de la chimie, F-38610 Gières, France
| | - Celio Vallée
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | | | - Eric Defrancq
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - Nicolas Spinelli
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | | | - Jérôme Dejeu
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
- FEMTO-ST Institute, CNRS UMR-6174, Université de Bourgogne Franche-Comté, F-25000 Besançon, France
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4
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Bonnet H, Coche-Guérente L, Defrancq E, Spinelli N, Van der Heyden A, Dejeu J. Negative SPR Signals during Low Molecular Weight Analyte Recognition. Anal Chem 2021; 93:4134-4140. [PMID: 33577288 DOI: 10.1021/acs.analchem.1c00071] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Surface plasmon resonance (SPR) is a powerful technique for studying biomolecular interactions mainly due to its sensitivity and real-time and label free advantages. While SPR signals are usually positive, only a few studies have reported sensorgrams with negative signals. The aim of the present work is to investigate and to explain the observation of negative SPR signals with the hypothesis that it reflects major changes in ligand conformation resulting from target binding. We demonstrated that these negative unconventional signals were due to the negative complex (ligand/analyte) refractive index increment (RII) deviation from the sum of the RII of the individual entities which counterbalanced the theoretical increase of the signal triggered by the target recognition and the ligand folding. We also found that the conformation change of biomolecules can induce a negative or a positive complex RII deviation depending on its sequence and immobilization mode.
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Affiliation(s)
- H Bonnet
- Université Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - L Coche-Guérente
- Université Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - E Defrancq
- Université Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - N Spinelli
- Université Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - A Van der Heyden
- Université Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - J Dejeu
- Université Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
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5
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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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6
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Di Pietro S, Bordoni V, Iacopini D, Achilli S, Pineschi M, Thépaut M, Fieschi F, Crotti P, Di Bussolo V. New lipophilic glycomimetic DC-SIGN ligands: Stereoselective synthesis and SPR-based binding inhibition assays. Bioorg Chem 2020; 107:104566. [PMID: 33387733 DOI: 10.1016/j.bioorg.2020.104566] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 12/09/2020] [Accepted: 12/14/2020] [Indexed: 12/30/2022]
Abstract
The design and synthesis of efficient ligands for DC-SIGN is a topic of high interest, because this C-type lectin has been implicated in the early stages of many infection processes. DC-SIGN membrane-protein presents four carbohydrate-binding domains (CRD) that specifically recognize mannose and fucose. Therefore, antagonists of minimal disaccharide epitope Manα(1,2)Man, represent potentially interesting antibacterial and antiviral agents. In the recent past, we were able to develop efficient antagonists, mimics of the natural moiety, characterized by the presence of a real d-carbamannose unit which confers greater stability to enzymatic breakdown than the corresponding natural disaccharide ligand. Herein, we present the challenging stereoselective synthesis of four new amino or azide glycomimetic DC-SIGN antagonists with attractive orthogonal lipophilic substituents in C(3), C(4) or C(6) positions of the real carba unit, which were expected to establish crucial interactions with lipophilic areas of DC-SIGN CRD. The activity of the new ligands was evaluated by SPR binding inhibition assays. The interesting results obtained, allow to acquire important information about the influence of the lipophilic substituents present in specific positions of the carba scaffold. Furthermore, C(6) benzyl C(4) tosylamide pseudodisaccharide displayed a good affinity for DC-SIGN with a more favorable IC50 value than those of the previously described real carba-analogues. This study provides valuable knowledge for the implementation of further structural modifications towards improved inhibitors.
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Affiliation(s)
- Sebastiano Di Pietro
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy.
| | - Vittorio Bordoni
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Dalila Iacopini
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, 56125 Pisa, Italy
| | - Silvia Achilli
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, 38000 Grenoble, France
| | - Mauro Pineschi
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Michel Thépaut
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, 38000 Grenoble, France
| | - Franck Fieschi
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, 38000 Grenoble, France
| | - Paolo Crotti
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy
| | - Valeria Di Bussolo
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, 56125 Pisa, Italy.
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7
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Abdu-Allah HHM, Wu SC, Lin CH, Tseng YY. Design, synthesis and molecular docking study of α-triazolylsialosides as non-hydrolyzable and potent CD22 ligands. Eur J Med Chem 2020; 208:112707. [PMID: 32942185 DOI: 10.1016/j.ejmech.2020.112707] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 07/28/2020] [Accepted: 07/28/2020] [Indexed: 12/16/2022]
Abstract
Ligand 1 was the first reported example of monomeric high-affinity synthetic CD22 ligand that regulated B cell activation in vitro, augmented antibody production and regulated immune responses in mice. Replacing O-glycoside linkage of 1 by nitrogen of triazole by click reaction afforded compounds which are as potent as the parent compound. The synthesis of the new compounds is straightforward with fewer synthetic steps and higher yield. Such a strategy provided stable ligand that can bind avidly and can be conjugated to drugs for B-cell targeting or multimeric formation. The new compounds were screened for their affinity to CD22, using surface plasmon resonance (SPR). Compound 12 was obtained as a bioisosteric analogue and an anomerically stable imitation of 1. It was, also, screened for MAG to test for selectivity and analyzed by molecular docking and dynamic simulation to explore the potential binding modes and source of selectivity within CD22. Our results could enable the development of small molecule drug capable of modulating the activity of CD22 in autoimmune diseases and malignancies derived from B-cells.
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Affiliation(s)
- Hajjaj H M Abdu-Allah
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.
| | - Shang-Chuen Wu
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan; Department of Chemistry, National Taiwan University, Taipei, Taiwan
| | - Yu-Yao Tseng
- Institute of Biological Chemistry, Academia Sinica, No. 128, Academia Road Section 2, Nan-Kang, Taipei, 11529, Taiwan.
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8
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Kroezen BS, Conti G, Girardi B, Cramer J, Jiang X, Rabbani S, Müller J, Kokot M, Luisoni E, Ricklin D, Schwardt O, Ernst B. A Potent Mimetic of the Siglec-8 Ligand 6'-Sulfo-Sialyl Lewis x. ChemMedChem 2020; 15:1706-1719. [PMID: 32744401 DOI: 10.1002/cmdc.202000417] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Indexed: 12/15/2022]
Abstract
Siglecs are members of the immunoglobulin gene family containing sialic acid binding N-terminal domains. Among them, Siglec-8 is expressed on various cell types of the immune system such as eosinophils, mast cells and weakly on basophils. Cross-linking of Siglec-8 with monoclonal antibodies triggers apoptosis in eosinophils and inhibits degranulation of mast cells, making Siglec-8 a promising target for the treatment of eosinophil- and mast cell-associated diseases such as asthma. The tetrasaccharide 6'-sulfo-sialyl Lewisx has been identified as a specific Siglec-8 ligand in glycan array screening. Here, we describe an extended study enlightening the pharmacophores of 6'-sulfo-sialyl Lewisx and the successful development of a high-affinity mimetic. Retaining the neuraminic acid core, the introduction of a carbocyclic mimetic of the Gal moiety and a sulfonamide substituent in the 9-position gave a 20-fold improved binding affinity. Finally, the residence time, which usually is the Achilles tendon of carbohydrate/lectin interactions, could be improved.
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Affiliation(s)
- Blijke S Kroezen
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Gabriele Conti
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Benedetta Girardi
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Jonathan Cramer
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Xiaohua Jiang
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Said Rabbani
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Jennifer Müller
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Maja Kokot
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Enrico Luisoni
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Daniel Ricklin
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Oliver Schwardt
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Beat Ernst
- Molecular Pharmacy Group Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
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9
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10
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Abstract
The present review offers an overview of nonclassical (e.g., with no pre- or in situ activation of a carboxylic acid partner) approaches for the construction of amide bonds. The review aims to comprehensively discuss relevant work, which was mainly done in the field in the last 20 years. Organization of the data follows a subdivision according to substrate classes: catalytic direct formation of amides from carboxylic and amines ( section 2 ); the use of carboxylic acid surrogates ( section 3 ); and the use of amine surrogates ( section 4 ). The ligation strategies (NCL, Staudinger, KAHA, KATs, etc.) that could involve both carboxylic acid and amine surrogates are treated separately in section 5 .
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Affiliation(s)
- Renata Marcia de Figueiredo
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Jean-Simon Suppo
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
| | - Jean-Marc Campagne
- Institut Charles Gerhardt de Montpellier (ICGM), UMR 5253-CNRS-UM-ENSCM, Ecole Nationale Supérieure de Chimie , 8 rue de l'Ecole Normale, 34296 Montpellier Cedex 5, France
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11
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Sialic acids in biological and therapeutic processes: opportunities and challenges. Future Med Chem 2015; 7:2285-99. [DOI: 10.4155/fmc.15.135] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
It is now well documented that carbohydrates play multiple roles in biological processes, and hence are interesting targets for chemical biology and medicinal chemistry programs. This review focuses on a subset of carbohydrates, specifically sialic acid containing carbohydrates. It highlights their occurrence and diversity, and presents evidence for their roles in a range of biological pathways. It illustrates that they are targets for novel medicinal chemistry strategies for a range of therapeutic areas, including cancer and immunity. Case studies highlight opportunities and challenges in this area, and sialic acid-based drugs that have entered clinical practice and are promising candidates for future disease intervention schemes, are discussed. The review concludes by highlighting perspectives and emerging roles for these targets.
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12
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Angata T, Nycholat CM, Macauley MS. Therapeutic Targeting of Siglecs using Antibody- and Glycan-Based Approaches. Trends Pharmacol Sci 2015; 36:645-660. [PMID: 26435210 PMCID: PMC4593978 DOI: 10.1016/j.tips.2015.06.008] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 06/24/2015] [Accepted: 06/25/2015] [Indexed: 01/01/2023]
Abstract
The sialic acid-binding immunoglobulin-like lectins (Siglecs) are a family of immunomodulatory receptors whose functions are regulated by their glycan ligands. Siglecs are attractive therapeutic targets because of their cell type-specific expression pattern, endocytic properties, high expression on certain lymphomas/leukemias, and ability to modulate receptor signaling. Siglec-targeting approaches with therapeutic potential encompass antibody- and glycan-based strategies. Several antibody-based therapies are in clinical trials and continue to be developed for the treatment of lymphoma/leukemia and autoimmune disease, while the therapeutic potential of glycan-based strategies for cargo delivery and immunomodulation is a promising new approach. Here we review these strategies with special emphasis on emerging approaches and disease areas that may benefit from targeting the Siglec family.
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Affiliation(s)
- Takashi Angata
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Corwin M Nycholat
- Department of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, CA, USA
| | - Matthew S Macauley
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, USA.
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13
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Prescher H, Gütgemann S, Frank M, Kuhfeldt E, Watzl C, Brossmer R. Synthesis and biological evaluation of 9- N -oxamyl sialosides as Siglec-7 ligands. Bioorg Med Chem 2015; 23:5915-21. [DOI: 10.1016/j.bmc.2015.06.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 06/19/2015] [Accepted: 06/24/2015] [Indexed: 11/26/2022]
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14
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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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15
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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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16
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Unconventional surface plasmon resonance signals reveal quantitative inhibition of transcriptional repressor EthR by synthetic ligands. Anal Biochem 2014; 452:54-66. [DOI: 10.1016/j.ab.2014.02.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 02/04/2014] [Accepted: 02/07/2014] [Indexed: 11/22/2022]
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17
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Monovalent mannose-based DC-SIGN antagonists: Targeting the hydrophobic groove of the receptor. Eur J Med Chem 2014; 75:308-26. [DOI: 10.1016/j.ejmech.2014.01.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 01/17/2014] [Accepted: 01/19/2014] [Indexed: 01/09/2023]
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18
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Rillahan CD, Macauley MS, Schwartz E, He Y, McBride R, Arlian BM, Rangarajan J, Fokin VV, Paulson JC. Disubstituted Sialic Acid Ligands Targeting Siglecs CD33 and CD22 Associated with Myeloid Leukaemias and B Cell Lymphomas. Chem Sci 2014; 5:2398-2406. [PMID: 24921038 DOI: 10.1039/c4sc00451e] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The siglec family of sialic acid-binding proteins are endocytic immune cell receptors that are recognized as potential targets for cell directed therapies. CD33 and CD22 are prototypical members and are validated candidates for targeting acute myeloid leukaemia and non-Hodgkin's lymphomas due to their restricted expression on myeloid cells and B-cells, respectively. While nanoparticles decorated with high affinity siglec ligands represent an attractive platform for delivery of therapeutic agents to these cells, a lack of ligands with suitable affinity and/or selectivity has hampered progress. Herein we describe selective ligands for both of these siglecs, which when displayed on liposomal nanoparticles, can efficiently target the cells expressing them in peripheral human blood. Key to their identification was the development of a facile method for chemo-enzymatic synthesis of disubstituted sialic acid analogues, combined with iterative rounds of synthesis and rapid functional analysis using glycan microarrays.
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Affiliation(s)
- Cory D Rillahan
- Department of Cell and Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA) ; Department of Chemical Physiology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Matthew S Macauley
- Department of Cell and Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA) ; Department of Chemical Physiology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Erik Schwartz
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Yuan He
- Department of Cell and Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA) ; Department of Chemical Physiology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Ryan McBride
- Department of Cell and Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA) ; Department of Chemical Physiology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Britni M Arlian
- Department of Cell and Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA) ; Department of Chemical Physiology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Janani Rangarajan
- Department of Cell and Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA) ; Department of Chemical Physiology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Valery V Fokin
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - James C Paulson
- Department of Cell and Molecular Biology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA) ; Department of Chemical Physiology, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
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Mortezai N, Behnken HN, Kurze AK, Ludewig P, Buck F, Meyer B, Wagener C. Tumor-associated Neu5Ac-Tn and Neu5Gc-Tn antigens bind to C-type lectin CLEC10A (CD301, MGL). Glycobiology 2013; 23:844-52. [PMID: 23507963 DOI: 10.1093/glycob/cwt021] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
In human tumors, glycoproteins often exhibit abnormal glycosylation patterns, e.g. certain Lewis structures, TF antigen, Tn antigen and/or their sialylated forms, creating additional binding sites for glycoreceptors. In the present study, we have analyzed the carbohydrate specificity of the C-type lectin CLEC10A using glycan profiling by enzyme-linked immunosorbent assay (ELISA). In addition to the known ligands, we show binding to two tumor-associated antigens, namely Neu5Acα2,6-Tn and Neu5Gcα2,6-Tn, with an affinity of CLEC10A in the micromolar range. Detailed analyses of the glycan-lectin interactions were carried out by surface plasmon resonance (SPR) and saturation transfer difference (STD) NMR. CLEC10A binds Neu5Acα2,6-Tn and Neu5Gcα2,6-Tn with dissociation constants of 297 and 80 µM, respectively, as determined by SPR. Comparison of the STD nuclear magnetic resonance (NMR) binding epitopes of Tn and Neu5Acα2,6-Tn revealed a constant binding mode of the N-acetylgalactosamine moiety. This finding is in good agreement with binding studies of CLEC10A transfectomas, which show a well-defined interaction of transmembrane CLEC10A with 6-sialylated-Tn structures. Since both Neu5Acα2,6-Tn and Neu5Gcα2,6-Tn together with the previously known Tn antigen are expressed in human tumors such as mammary carcinoma, the interaction with CLEC10A expressed by macrophages and dendritic cells could be of major functional significance in tumor progression.
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Affiliation(s)
- Naghmeh Mortezai
- Institute of Clinical Chemistry, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
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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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21
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Li X, Wang X, Snyder M. Systematic investigation of protein-small molecule interactions. IUBMB Life 2012; 65:2-8. [PMID: 23225626 DOI: 10.1002/iub.1111] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 10/03/2012] [Indexed: 01/01/2023]
Abstract
Cell signaling is extensively wired between cellular components to sustain cell proliferation, differentiation, and adaptation. The interaction network is often manifested in how protein function is regulated through interacting with other cellular components including small molecule metabolites. While many biochemical interactions have been established as reactions between protein enzymes and their substrates and products, much less is known at the system level about how small metabolites regulate protein functions through allosteric binding. In the past decade, study of protein-small molecule interactions has been lagging behind other types of interactions. Recent technological advances have explored several high-throughput platforms to reveal many "unexpected" protein-small molecule interactions that could have profound impact on our understanding of cell signaling. These interactions will help bridge gaps in existing regulatory loops of cell signaling and serve as new targets for medical intervention. In this review, we summarize recent advances of systematic investigation of protein-metabolite/small molecule interactions, and discuss the impact of such studies and their potential impact on both biological researches and medicine.
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Affiliation(s)
- Xiyan Li
- Department of Genetics, Stanford University, Stanford, CA, USA.
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22
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Nycholat CM, Rademacher C, Kawasaki N, Paulson JC. In silico-aided design of a glycan ligand of sialoadhesin for in vivo targeting of macrophages. J Am Chem Soc 2012; 134:15696-9. [PMID: 22967315 DOI: 10.1021/ja307501e] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Cell-specific delivery of therapeutic agents using ligand targeting is gaining interest because of its potential for increased efficacy and reduced side effects. The challenge is to develop a suitable ligand for a cell-surface receptor that is selectively expressed on the desired cell. Sialoadhesin (Sn, Siglec-1, CD169), a sialic acid-binding immunoglobulin-like lectin (Siglec) expressed on subsets of resident and inflammatory macrophages, is an attractive target for the development of a ligand-targeted delivery system. Here we report the development of a high-affinity and selective ligand for Sn that is an analogue of the natural ligand and is capable of targeting liposomal nanoparticles to Sn-expressing cells in vivo. An efficient in silico screen of a library of ∼8400 carboxylic acids was the key to identifying novel 9-N-acyl-substituted N-acetylneuramic acid (Neu5Ac) substituents as potential lead compounds. A small panel of targets were selected from the screen and synthesized to evaluate their affinities and selectivities. The most potent of these Sn ligands, 9-N-(4H-thieno[3,2-c]chromene-2-carbamoyl)-Neu5Acα2-3Galβ1-4GlcNAc ((TCC)Neu5Ac), was conjugated to lipids for display on a liposomal nanoparticle for evaluation of targeted delivery to cells. The (TCC)Neu5Ac liposomes were found to target liposomes selectively to cells expressing either murine or human Sn in vitro, and when administered to mice, they exhibited in vivo targeting to Sn-positive macrophages.
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Affiliation(s)
- Corwin M Nycholat
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, California 92037, United States
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23
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Exploration of the binding proteins of perfluorooctane sulfonate by a T7 phage display screen. Bioorg Med Chem 2012; 20:3985-90. [PMID: 22658539 DOI: 10.1016/j.bmc.2012.05.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 05/09/2012] [Accepted: 05/09/2012] [Indexed: 01/09/2023]
Abstract
Perfluorooctane sulfonate (PFOS) is a pollutant widely found throughout nature and is toxic to animals. We created a PFOS analogue on a polyethylene glycol polyacrylamide copolymer and isolated peptides that preferentially bound the PFOS analogue using a T7 phage display system. Bioinformatic analysis using the FASTAskan program on the RELIC bioinformatics server showed several human proteins that likely bound PFOS. Among them, we confirmed binding between PFOS and a recombinant soluble form of monocyte differentiation antigen CD14 (sCD14) by a surface plasmon biosensor. Furthermore, PFOS inhibited TNF-α production induced by the sCD14 in mouse macrophage RAW264.7 cells.
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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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25
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Abstract
The combination of carbohydrate and lipid generates unusual molecules in which the two distinctive halves of the glycoconjugate influence the function of each other. Membrane glycolipids can act as primary receptors for carbohydrate binding proteins to mediate transmembrane signaling despite restriction to the outer bilayer leaflet. The extensive heterogeneity of the lipid moiety plays a significant, but still largely unknown, role in glycosphingolipid function. Potential interplay between glycolipids and their fatty acid isoforms, together with their preferential interaction with cholesterol, generates a complex mechanism for the regulation of their function in cellular physiology.
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Affiliation(s)
- Clifford A Lingwood
- Research Institute, Hospital for Sick Children, Molecular Structure and Function, Toronto, Ontario M5G 1X8, Canada.
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26
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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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27
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Abdu-Allah HHM, Watanabe K, Completo GC, Sadagopan M, Hayashizaki K, Takaku C, Tamanaka T, Takematsu H, Kozutsumi Y, Paulson JC, Tsubata T, Ando H, Ishida H, Kiso M. CD22-antagonists with nanomolar potency: the synergistic effect of hydrophobic groups at C-2 and C-9 of sialic acid scaffold. Bioorg Med Chem 2011; 19:1966-71. [PMID: 21349726 DOI: 10.1016/j.bmc.2011.01.060] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 01/26/2011] [Accepted: 01/28/2011] [Indexed: 12/01/2022]
Abstract
In earlier studies, we identified the C-9 amido derivative 1 (9-(4'-hydroxy-4-biphenyl)acetamido-9-deoxy-Neu5Gcα2-6GalOMP) and the C-9 amino derivative 2 (9-(4'-hydroxy-4-biphenyl)methylamino-9-deoxy-Neu5Gcα2-6GalOMP) have the most promising affinity for mouse CD22 and human CD22, respectively. Replacing the subterminal galactose residue (2-6Gal-OMP) of 1 with benzyl (5) or biphenylmethyl (6) as aglycone led to even higher potency for mCD22. In this study, both compounds showed improved potency and selectivity for CD22 (IC(50) 70 nM) and 712-fold more selective for CD22 than for MAG. The corresponding derivatives of 2, compounds 8 and 9, showed comparable activity to 2 but lower potency and selectivity than 5 and 6. Although compounds 5-9 are simple and small molecular weight antagonists, they showed much high potency and selectivity than the corresponding compounds having α 2-6Gal linkage. Both biological and computational docking simulation studies suggest that the 2-6Gal-OMP residues of 1 and 2 are not critical for binding process and could be replaced with hydrophobic non-carbohydrate moieties. The data presented herein has significant implications for the design and discovery of next-generation CD22-antagonists.
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Affiliation(s)
- Hajjaj H M Abdu-Allah
- Department of Applied Bio-organic Chemistry, Faculty of Applied Biological Sciences, The United Graduate School of Agricultural Sciences, Gifu University, Gifu 501-1193, Japan.
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28
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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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29
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Mesch S, Lemme K, Koliwer-Brandl H, Strasser DS, Schwardt O, Kelm S, Ernst B. Kinetic and thermodynamic properties of MAG antagonists. Carbohydr Res 2010; 345:1348-59. [DOI: 10.1016/j.carres.2010.03.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Revised: 03/04/2010] [Accepted: 03/09/2010] [Indexed: 11/29/2022]
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