1
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Gabba A, Attariya R, Behren S, Pett C, van der Horst JC, Yurugi H, Yu J, Urschbach M, Sabin J, Birrane G, Schmitt E, van Vliet SJ, Besenius P, Westerlind U, Murphy PV. MUC1 Glycopeptide Vaccine Modified with a GalNAc Glycocluster Targets the Macrophage Galactose C-type Lectin on Dendritic Cells to Elicit an Improved Humoral Response. J Am Chem Soc 2023. [PMID: 37279388 DOI: 10.1021/jacs.2c12843] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mucin expression and glycosylation patterns on cancer cells differ markedly from healthy cells. Mucin 1 (MUC1) is overexpressed in several solid tumors and presents high levels of aberrant, truncated O-glycans (e.g., Tn antigen). Dendritic cells (DCs) express lectins that bind to these tumor-associated carbohydrate antigens (TACAs) to modulate immune responses. Selectively targeting these receptors with synthetic TACAs is a promising strategy to develop anticancer vaccines and to overcome TACA tolerance. In this work, we prepared, via a solid phase peptide synthesis approach, a modular tripartite vaccine candidate, incorporating a high-affinity glycocluster based on a tetraphenylethylene scaffold, to target the macrophage galactose-type lectin (MGL) on antigen presenting cells. MGL is a C-type lectin receptor that binds Tn antigens and can route them to human leukocyte antigen class II or I, making it an attractive target for anticancer vaccines. Conjugation of the glycocluster to a library of MUC1 glycopeptides bearing the Tn antigen is shown to promote uptake and recognition of the TACA by DCs via MGL. In vivo testing revealed that immunization with the newly designed vaccine construct bearing the GalNAc glycocluster induced a higher titer of anti-Tn-MUC1 antibodies compared to the TACAs alone. Additionally, the antibodies obtained bind a library of tumor-associated saccharide structures on MUC1 and MUC1-positive breast cancer cells. Conjugation of a high-affinity ligand for MGL to tumor-associated MUC1 glycopeptide antigens has a synergistic impact on antibody production.
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Affiliation(s)
- Adele Gabba
- School of Biological and Chemical Sciences, University of Galway, University Rd., H91 TK33 Galway, Ireland
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Riem Attariya
- Institute of Immunology, University Medical Center Mainz, Langenbeckstr.1, 55131 Mainz, Germany
| | - Sandra Behren
- Department of Chemistry, Umeå University, KBC-Building, Linneaus väg 6, S-907 36 Umeå, Sweden
| | - Christian Pett
- Department of Chemistry, Umeå University, KBC-Building, Linneaus väg 6, S-907 36 Umeå, Sweden
| | - Joost C van der Horst
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands
- Amsterdam Institute for Infection and Immunity, Cancer Immunology1105 AZ Amsterdam, the Netherlands
| | - Hajime Yurugi
- Institute of Immunology, University Medical Center Mainz, Langenbeckstr.1, 55131 Mainz, Germany
| | - Jin Yu
- Glycosciences Laboratory, Imperial College London, W12 0NN London, U.K
| | - Moritz Urschbach
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Juan Sabin
- AFFINImeter Scientific & Development Team, Software 4 Science Developments, 15782 Santiago de Compostela, A Coruña, Spain
- Departamento de Física Aplicada, Facultad de Física, Universidad de Santiago de Compostela, 15705 Santiago de Compostela, Spain
| | - Gabriel Birrane
- Division of Experimental Medicine, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, United States
| | - Edgar Schmitt
- Institute of Immunology, University Medical Center Mainz, Langenbeckstr.1, 55131 Mainz, Germany
| | - Sandra J van Vliet
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, 1081 HV Amsterdam, the Netherlands
- Amsterdam Institute for Infection and Immunity, Cancer Immunology1105 AZ Amsterdam, the Netherlands
| | - Pol Besenius
- Department of Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Ulrika Westerlind
- Department of Chemistry, Umeå University, KBC-Building, Linneaus väg 6, S-907 36 Umeå, Sweden
| | - Paul V Murphy
- School of Biological and Chemical Sciences, University of Galway, University Rd., H91 TK33 Galway, Ireland
- SSPC, the Science Foundation Ireland Research Centre for Pharmaceuticals, University of Galway, University Rd., H91 TK33 Galway, Ireland
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2
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Behren S, Yu J, Pett C, Schorlemer M, Heine V, Fischöder T, Elling L, Westerlind U. Fucose Binding Motifs on Mucin Core Glycopeptides Impact Bacterial Lectin Recognition. Angew Chem Int Ed Engl 2023:e202302437. [PMID: 37067376 DOI: 10.1002/anie.202302437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/29/2023] [Accepted: 04/11/2023] [Indexed: 04/18/2023]
Abstract
Mucin glycoproteins are essential components of the mucosal barrier, which protects the host from pathogens. Throughout evolution, bacteria have developed strategies to modulate and penetrate this barrier, and cause virulence by interacting with mucin O-glycans at the epithelial cell-surface. O-fucosylated glycan epitopes on mucins are key ligands of many bacterial lectins. Here, a chemoenzymatic synthesis strategy is described to prepare a library of fucosylated mucin core glycopeptides to enable studies of mucin-interacting and fucose-binding bacterial lectins. Glycan cores with biologically important Lewis and H-antigens were prepared decorating the peptide backbone at different sites and densities. The fucosylated mucin glycopeptides were applied in microarray binding studies to explore the importance of glycan core and peptide backbone presentation of these antigens in binding interactions with the P. aeruginosa lectin LecB and the C. difficile toxin A.
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Affiliation(s)
- Sandra Behren
- Umeå University: Umea Universitet, Department of Chemistry, SWEDEN
| | - Jin Yu
- Imperial College London Faculty of Medicine, Glycoscience laboratory, UNITED KINGDOM
| | - Christian Pett
- Umeå University: Umea Universitet, Department of Chemistry, SWEDEN
| | | | - Viktoria Heine
- RWTH Aachen Fakultät für Mathematik Informatik und Naturwissenschaften: Rheinisch Westfalische Technische Hochschule Aachen Fakultat fur Mathematik Informatik und Naturwissenschaften, Laboratory for Biomaterials, GERMANY
| | - Thomas Fischöder
- RWTH Aachen Fakultät für Mathematik Informatik und Naturwissenschaften: Rheinisch Westfalische Technische Hochschule Aachen Fakultat fur Mathematik Informatik und Naturwissenschaften, Laboratory for Biomaterials, GERMANY
| | - Lothar Elling
- RWTH Aachen Fakultät für Mathematik Informatik und Naturwissenschaften: Rheinisch Westfalische Technische Hochschule Aachen Fakultat fur Mathematik Informatik und Naturwissenschaften, Laboratory for Biomaterials, GERMANY
| | - Ulrika Westerlind
- Umeå Universitet Teknisk-Naturvetenskaplig Fakultet: Umea Universitet Teknisk-Naturvetenskaplig Fakultet, Department of Chemistry, Linnaeus väg 10, 901 87, Umeå, SWEDEN
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3
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Behren S, Schorlemer M, Schmidt G, Aktories K, Westerlind U. Antibodies Directed Against GalNAc‐ and GlcNAc‐O‐Tyrosine Posttranslational Modifications – a New Tool for Glycoproteomic Detection. Chemistry 2023; 29:e202300392. [PMID: 37052513 DOI: 10.1002/chem.202300392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Indexed: 03/03/2023]
Abstract
In the last decade, it was discovered that protein mucin-type O-glycosylation and O-GlcNAcylation modify Tyr residues besides the well explored Thr and Ser amino acids. Several glycoproteomic studies have identified α-GalNAc-O-Tyr modifications, and studies propose that β-GlcNAc-O-Tyr also exists as a new group of posttranslational modifications (PTMs). Specific bacterial toxins have further been identified to modify host GTPases with α-GlcNAc-O-Tyr to promote bacterial virulence. Despite being identified on numerous proteins, the biological roles, biosynthesis and expression of GalNAc- and GlcNAc-O-Tyr modifications are poorly understood. A major obstacle is the lack of tools to specifically detect and identify proteins containing these modifications. With this in mind, we prepared vaccine constructs and raised antibodies to enable selective detection of proteins carrying these new PTMs. The obtained polyclonal antibody sera were evaluated using ELISA and glycopeptide microarrays and were found to be highly selective for GlcNAc- and GalNAc-O-Tyr glycopeptides over the corresponding Ser- and Thr-modifications. For microarray analysis, synthetic GlcNAc- and GalNAc-O-Tyr Fmoc-amino acids were prepared and applied in Fmoc-SPPS to obtain an extensive O-glycopeptide library. After affinity purification, the antibodies were applied in western blot analysis and showed specific detection of α-GlcNAc-O-Tyr modified RhoA GTPase.
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Affiliation(s)
| | | | - Gudula Schmidt
- Universität Freiburg Mathematisch- Naturwissenschaftliche Fakultät: Universite de Fribourg Faculte de sciences et de medecine Institut für Experimentelle und Klinische Pharmakologie und Toxikologie GERMANY
| | - Klaus Aktories
- Universität Freiburg Mathematisch- Naturwissenschaftliche Fakultät: Universite de Fribourg Faculte de sciences et de medecine Institut für Experimentelle und Klinische Pharmakologie und Toxikologie GERMANY
| | - Ulrika Westerlind
- Umeå Universitet Teknisk-Naturvetenskaplig Fakultet: Umea Universitet Teknisk-Naturvetenskaplig Fakultet Department of Chemistry Linnaeus väg 10 901 87 Umeå SWEDEN
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4
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Jiang S, Wang T, Behren S, Westerlind U, Gawlitza K, Persson JL, Rurack K. Sialyl-Tn Antigen-Imprinted Dual Fluorescent Core-Shell Nanoparticles for Ratiometric Sialyl-Tn Antigen Detection and Dual-Color Labeling of Cancer Cells. ACS Appl Nano Mater 2022; 5:17592-17605. [PMID: 36583127 PMCID: PMC9791662 DOI: 10.1021/acsanm.2c03252] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/17/2022] [Indexed: 06/17/2023]
Abstract
Sialyl-Tn (STn or sialyl-Thomsen-nouveau) is a carbohydrate antigen expressed by more than 80% of human carcinomas. We here report a strategy for ratiometric STn detection and dual-color cancer cell labeling, particularly, by molecularly imprinted polymers (MIPs). Imprinting was based on spectroscopic studies of a urea-containing green-fluorescent monomer 1 and STn-Thr-Na (sodium salt of Neu5Acα2-6GalNAcα-O-Thr). A few-nanometer-thin green-fluorescent polymer shell, in which STn-Thr-Na was imprinted with 1, other comonomers, and a cross-linker, was synthesized from the surface of red-emissive carbon nanodot (R-CND)-doped silica nanoparticles, resulting in dual fluorescent STn-MIPs. Dual-color labeling of cancer cells was achieved since both red and green emissions were detected in two separate channels of the microscope and an improved accuracy was obtained in comparison with single-signal MIPs. The flow cytometric cell analysis showed that the binding of STn-MIPs was significantly higher (p < 0.001) than that of non-imprinted polymer (NIP) control particles within the same cell line, allowing to distinguish populations. Based on the modularity of the luminescent core-fluorescent MIP shell architecture, the concept can be transferred in a straightforward manner to other target analytes.
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Affiliation(s)
- Shan Jiang
- Chemical
and Optical Sensing Division (1.9), Bundesanstalt
für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße
11, D-12489Berlin, Germany
| | - Tianyan Wang
- Department
of Molecular Biology, Umeå University, S-901 87Umeå, Sweden
| | - Sandra Behren
- Department
of Chemistry, Umeå University, S-901 87Umeå, Sweden
| | | | - Kornelia Gawlitza
- Chemical
and Optical Sensing Division (1.9), Bundesanstalt
für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße
11, D-12489Berlin, Germany
| | - Jenny L. Persson
- Department
of Molecular Biology, Umeå University, S-901 87Umeå, Sweden
- Division
of Experimental Cancer Research, Department of Translational Medicine,
Clinical Research Centre, Lund University, S-214 28Malmö, Sweden
| | - Knut Rurack
- Chemical
and Optical Sensing Division (1.9), Bundesanstalt
für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße
11, D-12489Berlin, Germany
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5
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Behren S, Westerlind U. Novel approaches to design glycan‐based antibacterial inhibitors. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sandra Behren
- Umeå Universitet Teknisk-Naturvetenskaplig Fakultet: Umea Universitet Teknisk-Naturvetenskaplig Fakultet Department of Chemistry SWEDEN
| | - Ulrika Westerlind
- Umeå Universitet Teknisk-Naturvetenskaplig Fakultet: Umea Universitet Teknisk-Naturvetenskaplig Fakultet Department of Chemistry Linnaeus väg 10 901 87 Umeå SWEDEN
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6
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Wu X, McFall-Boegeman H, Rashidijahanabad Z, Liu K, Pett C, Yu J, Schorlemer M, Ramadan S, Behren S, Westerlind U, Huang X. Synthesis and immunological evaluation of the unnatural β-linked mucin-1 Thomsen-Friedenreich conjugate. Org Biomol Chem 2021; 19:2448-2455. [PMID: 33645601 PMCID: PMC8011953 DOI: 10.1039/d1ob00007a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
MUC1 glycopeptides are attractive antigens for anti-cancer vaccine development. One potential drawback in using the native MUC1 glycopeptide for vaccine design is the instability of the O-glycosyl linkage between the glycan and the peptide backbone to glycosidase. To overcome this challenge, a MUC1 glycopeptide mimic has been synthesized with the galactose-galactosamine disaccharide linked with threonine (Thomsen-Friedenreich or Tf antigen) through an unnatural β-glycosyl bond. The resulting MUC1-β-Tf had a much-enhanced stability toward a glycosidase capable of cleaving the glycan from the corresponding MUC1 glycopeptide with the natural α-Tf linkage. The MUC1-β-Tf was subsequently conjugated with a powerful carrier bacteriophage Qβ. The conjugate induced high levels of IgG antibodies in clinically relevant human MUC1 transgenic mice, which cross-recognized not only the natural MUC1-α-Tf glycopeptide but also MUC1 expressing tumor cells, supporting the notion that a simple switch of the stereochemistry of the glycan/peptide linkage can be a strategy for anti-cancer vaccine epitope design for glycopeptides.
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Affiliation(s)
- Xuanjun Wu
- National Glycoengineering Research Center, Shandong University, Qingdao, Shandong 266237, China
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7
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Lauster D, Klenk S, Ludwig K, Nojoumi S, Behren S, Adam L, Stadtmüller M, Saenger S, Zimmler S, Hönzke K, Yao L, Hoffmann U, Bardua M, Hamann A, Witzenrath M, Sander LE, Wolff T, Hocke AC, Hippenstiel S, De Carlo S, Neudecker J, Osterrieder K, Budisa N, Netz RR, Böttcher C, Liese S, Herrmann A, Hackenberger CPR. Phage capsid nanoparticles with defined ligand arrangement block influenza virus entry. Nat Nanotechnol 2020; 15:373-379. [PMID: 32231271 DOI: 10.1038/s41565-020-0660-2] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 02/25/2020] [Indexed: 05/21/2023]
Abstract
Multivalent interactions at biological interfaces occur frequently in nature and mediate recognition and interactions in essential physiological processes such as cell-to-cell adhesion. Multivalency is also a key principle that allows tight binding between pathogens and host cells during the initial stages of infection. One promising approach to prevent infection is the design of synthetic or semisynthetic multivalent binders that interfere with pathogen adhesion1-4. Here, we present a multivalent binder that is based on a spatially defined arrangement of ligands for the viral spike protein haemagglutinin of the influenza A virus. Complementary experimental and theoretical approaches demonstrate that bacteriophage capsids, which carry host cell haemagglutinin ligands in an arrangement matching the geometry of binding sites of the spike protein, can bind to viruses in a defined multivalent mode. These capsids cover the entire virus envelope, thus preventing its binding to the host cell as visualized by cryo-electron tomography. As a consequence, virus infection can be inhibited in vitro, ex vivo and in vivo. Such highly functionalized capsids present an alternative to strategies that target virus entry by spike-inhibiting antibodies5 and peptides6 or that address late steps of the viral replication cycle7.
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Affiliation(s)
- Daniel Lauster
- Institut für Chemie und Biochemie, Organische Chemie, Freie Universität Berlin, Berlin, Germany
- Institut für Biologie, Molekulare Biophysik, IRI Life Sciences, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Simon Klenk
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany
- Institut für Chemie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Kai Ludwig
- Forschungszentrum für Elektronenmikroskopie und Gerätezentrum BioSupraMol, Institut für Chemie und Biochemie, Freie Universität Berlin, Berlin, Germany
| | - Saba Nojoumi
- Institut für Chemie, Biokatalyse, Technische Universität Berlin, Berlin, Germany
- Department of Chemistry, University of Manitoba, Winnipeg, Canada
| | - Sandra Behren
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany
- Institut für Chemie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Lutz Adam
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany
- Institut für Chemie, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Marlena Stadtmüller
- Robert Koch Institut, FG 17 Influenzaviren und weitere Viren des Respirationstraktes, Berlin, Germany
| | - Sandra Saenger
- Robert Koch Institut, FG 17 Influenzaviren und weitere Viren des Respirationstraktes, Berlin, Germany
| | - Stephanie Zimmler
- Robert Koch Institut, FG 17 Influenzaviren und weitere Viren des Respirationstraktes, Berlin, Germany
| | - Katja Hönzke
- Medizinische Klinik mit Schwerpunkt Infektiologie und Pneumologie, Charité, Universitätsmedizin Berlin, Partner von Freie Universität Berlin, Humboldt-Universität zu Berlin und Berlin Institute of Health, Berlin, Germany
| | - Ling Yao
- Medizinische Klinik mit Schwerpunkt Infektiologie und Pneumologie, Charité, Universitätsmedizin Berlin, Partner von Freie Universität Berlin, Humboldt-Universität zu Berlin und Berlin Institute of Health, Berlin, Germany
| | - Ute Hoffmann
- Experimentelle Rheumatologie, Deutsches Rheuma-Forschungszentrum Berlin, ein Leibniz-Institut, Berlin, Germany
| | - Markus Bardua
- Experimentelle Rheumatologie, Deutsches Rheuma-Forschungszentrum Berlin, ein Leibniz-Institut, Berlin, Germany
| | - Alf Hamann
- Experimentelle Rheumatologie, Deutsches Rheuma-Forschungszentrum Berlin, ein Leibniz-Institut, Berlin, Germany
| | - Martin Witzenrath
- Medizinische Klinik mit Schwerpunkt Infektiologie und Pneumologie, Charité, Universitätsmedizin Berlin, Partner von Freie Universität Berlin, Humboldt-Universität zu Berlin und Berlin Institute of Health, Berlin, Germany
| | - Leif E Sander
- Medizinische Klinik mit Schwerpunkt Infektiologie und Pneumologie, Charité, Universitätsmedizin Berlin, Partner von Freie Universität Berlin, Humboldt-Universität zu Berlin und Berlin Institute of Health, Berlin, Germany
| | - Thorsten Wolff
- Robert Koch Institut, FG 17 Influenzaviren und weitere Viren des Respirationstraktes, Berlin, Germany
| | - Andreas C Hocke
- Medizinische Klinik mit Schwerpunkt Infektiologie und Pneumologie, Charité, Universitätsmedizin Berlin, Partner von Freie Universität Berlin, Humboldt-Universität zu Berlin und Berlin Institute of Health, Berlin, Germany
| | - Stefan Hippenstiel
- Medizinische Klinik mit Schwerpunkt Infektiologie und Pneumologie, Charité, Universitätsmedizin Berlin, Partner von Freie Universität Berlin, Humboldt-Universität zu Berlin und Berlin Institute of Health, Berlin, Germany
| | | | - Jens Neudecker
- Chirurgische Klinik, Campus Mitte/Campus Virchow Klinikum, Charité, Universitätsmedizin Berlin, Partner von Freie Universität Berlin, Humboldt-Universität zu Berlin, und Berlin Institute of Health, Berlin, Germany
| | - Klaus Osterrieder
- Institut für Virologie, Robert von Ostertag-Haus, Zentrum für Infektionsmedizin, Freie Universität Berlin, Berlin, Germany
| | - Nediljko Budisa
- Institut für Chemie, Biokatalyse, Technische Universität Berlin, Berlin, Germany
- Department of Chemistry, University of Manitoba, Winnipeg, Canada
| | - Roland R Netz
- Fachbereich Physik, Theoretische Biophysik und Physik weicher Materie, Freie Universität Berlin, Berlin, Germany
| | - Christoph Böttcher
- Forschungszentrum für Elektronenmikroskopie und Gerätezentrum BioSupraMol, Institut für Chemie und Biochemie, Freie Universität Berlin, Berlin, Germany
| | - Susanne Liese
- Fachbereich Physik, Theoretische Biophysik und Physik weicher Materie, Freie Universität Berlin, Berlin, Germany.
- Department of Mathematics, University of Oslo (UiO), Oslo, Norway.
| | - Andreas Herrmann
- Institut für Biologie, Molekulare Biophysik, IRI Life Sciences, Humboldt-Universität zu Berlin, Berlin, Germany.
| | - Christian P R Hackenberger
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany.
- Institut für Chemie, Humboldt-Universität zu Berlin, Berlin, Germany.
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8
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Wu X, McKay C, Pett C, Yu J, Schorlemer M, Ramadan S, Lang S, Behren S, Westerlind U, Finn MG, Huang X. Synthesis and Immunological Evaluation of Disaccharide Bearing MUC-1 Glycopeptide Conjugates with Virus-like Particles. ACS Chem Biol 2019; 14:2176-2184. [PMID: 31498587 DOI: 10.1021/acschembio.9b00381] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mucin-1 (MUC1) is a highly attractive antigenic target for anticancer vaccines. Naturally existing MUC1 can contain multiple types of O-linked glycans, including the Thomsen-Friedenreich (Tf) antigen and the Sialyl Thomsen-nouveau (STn) antigen. In order to target these antigens as potential anticancer vaccines, MUC1 glycopeptides SAPDT*RPAP (T* is the glycosylation site) bearing the Tf and the STn antigen, respectively, have been synthesized. The bacteriophage Qβ carrier is a powerful carrier for antigen delivery. The conjugates of MUC1-Tf and -STn glycopeptides with Qβ were utilized to immunize immune-tolerant human MUC1 transgenic (MUC1.Tg) mice, which elicited superior levels of anti-MUC1 IgG antibodies with titers reaching over 2 million units. The IgG antibodies recognized a wide range of MUC1 glycopeptides bearing diverse glycans. Antibodies induced by Qβ-MUC1-Tf showed strongest binding, with MUC1-expressing melanoma B16-MUC1 cells, and effectively killed these cells in vitro. Vaccination with Qβ-MUC1-Tf first followed by tumor challenge in a lung metastasis model showed significant reductions of the number of tumor foci in the lungs of immunized mice as compared to those in control mice. This was the first time that a MUC1-Tf-based vaccine has shown in vivo efficacy in a tumor model. As such, Qβ-MUC1 glycopeptide conjugates have great potential as anticancer vaccines.
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Affiliation(s)
- Xuanjun Wu
- National Glycoengineering Research Center, Shandong University, Qingdao, Shandong 266237, China
| | - Craig McKay
- School of Chemistry & Biochemistry and School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Christian Pett
- Leibniz-Institut für Analytische Wissenschaften ISAS e.V., 44227 Dortmund, Germany
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Jin Yu
- Leibniz-Institut für Analytische Wissenschaften ISAS e.V., 44227 Dortmund, Germany
| | - Manuel Schorlemer
- Leibniz-Institut für Analytische Wissenschaften ISAS e.V., 44227 Dortmund, Germany
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Sherif Ramadan
- Chemistry Department, Faculty of Science, Benha University, Benha, Qaliobiya 13518, Egypt
| | | | - Sandra Behren
- Leibniz-Institut für Analytische Wissenschaften ISAS e.V., 44227 Dortmund, Germany
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - Ulrika Westerlind
- Leibniz-Institut für Analytische Wissenschaften ISAS e.V., 44227 Dortmund, Germany
- Department of Chemistry, Umeå University, 901 87 Umeå, Sweden
| | - M. G. Finn
- School of Chemistry & Biochemistry and School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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9
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Behren S, Westerlind U. Glycopeptides and -Mimetics to Detect, Monitor and Inhibit Bacterial and Viral Infections: Recent Advances and Perspectives. Molecules 2019; 24:E1004. [PMID: 30871155 PMCID: PMC6471658 DOI: 10.3390/molecules24061004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 11/17/2022] Open
Abstract
The initial contact of pathogens with host cells is usually mediated by their adhesion to glycan structures present on the cell surface in order to enable infection. Furthermore, glycans play important roles in the modulation of the host immune responses to infection. Understanding the carbohydrate-pathogen interactions are of importance for the development of novel and efficient strategies to either prevent, or interfere with pathogenic infection. Synthetic glycopeptides and mimetics thereof are capable of imitating the multivalent display of carbohydrates at the cell surface, which have become an important objective of research over the last decade. Glycopeptide based constructs may function as vaccines or anti-adhesive agents that interfere with the ability of pathogens to adhere to the host cell glycans and thus possess the potential to improve or replace treatments that suffer from resistance. Additionally, synthetic glycopeptides are used as tools for epitope mapping of antibodies directed against structures present on various pathogens and have become important to improve serodiagnostic methods and to develop novel epitope-based vaccines. This review will provide an overview of the most recent advances in the synthesis and application of glycopeptides and glycopeptide mimetics exhibiting a peptide-like backbone in glycobiology.
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Affiliation(s)
- Sandra Behren
- Department of Chemistry, Umeå University, 90187 Umeå, Sweden.
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Abstract
Photochemical degradation is an important issue to be overcome in advancing the lifetime of fluorene-containing conjugated polymers. In order to optimize the inertness of the materials, a quantitative measure for the efficiency of degradation is needed. Here, we introduce a method to measure a relative quantum yield of the photochemical degradation by monitoring the kinetics of the process by means of UV/vis spectroscopy and liquid chromatography (LC) techniques. This method is employed to a set of differently substituted 2,7-diphenylfluorenes, serving as model compounds for polyfluorene materials. Our measurements show that the quantum yield changes by orders of magnitude upon varying the bridge substituents and that altered kinetics indicate changing degradation mechanisms.
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Affiliation(s)
- Björn Kobin
- Department of Chemistry & IRIS Adlershof, Humboldt-Universität zu Berlin , 12489 Berlin, Germany
| | - Sandra Behren
- Department of Chemistry & IRIS Adlershof, Humboldt-Universität zu Berlin , 12489 Berlin, Germany
| | - Beatrice Braun-Cula
- Department of Chemistry & IRIS Adlershof, Humboldt-Universität zu Berlin , 12489 Berlin, Germany
| | - Stefan Hecht
- Department of Chemistry & IRIS Adlershof, Humboldt-Universität zu Berlin , 12489 Berlin, Germany
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