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Wilhelm I, Levit-Zerdoun E, Jakob J, Villringer S, Frensch M, Übelhart R, Landi A, Müller P, Imberty A, Thuenauer R, Claudinon J, Jumaa H, Reth M, Eibel H, Hobeika E, Römer W. Carbohydrate-dependent B cell activation by fucose-binding bacterial lectins. Sci Signal 2019; 12:12/571/eaao7194. [PMID: 30837305 DOI: 10.1126/scisignal.aao7194] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bacterial lectins are typically multivalent and bind noncovalently to specific carbohydrates on host tissues to facilitate bacterial adhesion. Here, we analyzed the effects of two fucose-binding lectins, BambL from Burkholderia ambifaria and LecB from Pseudomonas aeruginosa, on specific signaling pathways in B cells. We found that these bacterial lectins induced B cell activation, which, in vitro, was dependent on the cell surface expression of the B cell antigen receptor (BCR) and its co-receptor CD19, as well as on spleen tyrosine kinase (Syk) activity. The resulting release of intracellular Ca2+ was followed by an increase in the cell surface abundance of the activation marker CD86, augmented cytokine secretion, and subsequent cell death, replicating all of the events that are observed in vitro upon canonical and antigen-mediated B cell activation. Moreover, injection of BambL in mice resulted in a substantial, BCR-independent loss of B cells in the bone marrow with simultaneous, transient enlargement of the spleen (splenomegaly), as well as an increase in the numbers of splenic B cells and myeloid cells. Together, these data suggest that bacterial lectins can initiate polyclonal activation of B cells through their sole capacity to bind to fucose.
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Affiliation(s)
- Isabel Wilhelm
- Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.,Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, 79104 Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, 79104 Freiburg, Germany
| | - Ella Levit-Zerdoun
- Max Planck Institute of Immunology and Epigenetics Freiburg, 79108 Freiburg, Germany.,International Max Planck Research School (IMPRS), Max Planck Institute of Immunobiology and Epigenetics Freiburg, 79108 Freiburg, Germany.,German Cancer Consortium (DKTK) partner site Freiburg, German Cancer Center (DKFZ), Heidelberg, Institute of Molecular Medicine and Cell Research, 79104 Freiburg, Germany
| | - Johanna Jakob
- Institute for Immunology, University Medical Centre Ulm, 89081 Ulm, Germany
| | - Sarah Villringer
- Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, 79104 Freiburg, Germany
| | - Marco Frensch
- Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, 79104 Freiburg, Germany.,International Max Planck Research School (IMPRS), Max Planck Institute of Immunobiology and Epigenetics Freiburg, 79108 Freiburg, Germany
| | - Rudolf Übelhart
- Institute for Immunology, University Medical Centre Ulm, 89081 Ulm, Germany
| | - Alessia Landi
- Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, 79104 Freiburg, Germany
| | - Peter Müller
- Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, 79104 Freiburg, Germany
| | - Anne Imberty
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
| | - Roland Thuenauer
- Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, 79104 Freiburg, Germany
| | - Julie Claudinon
- Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, 79104 Freiburg, Germany
| | - Hassan Jumaa
- Institute for Immunology, University Medical Centre Ulm, 89081 Ulm, Germany
| | - Michael Reth
- Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, 79104 Freiburg, Germany.,Max Planck Institute of Immunology and Epigenetics Freiburg, 79108 Freiburg, Germany
| | - Hermann Eibel
- CCI-Center for Chronic Immunodeficiency (CCI), University Medical Centre, 79106 Freiburg, Germany.,Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Elias Hobeika
- Institute for Immunology, University Medical Centre Ulm, 89081 Ulm, Germany.
| | - Winfried Römer
- Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany. .,Spemann Graduate School of Biology and Medicine (SGBM), University of Freiburg, 79104 Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, 79104 Freiburg, Germany
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Ribeiro JP, Villringer S, Goyard D, Coche-Guerente L, Höferlin M, Renaudet O, Römer W, Imberty A. Tailor-made Janus lectin with dual avidity assembles glycoconjugate multilayers and crosslinks protocells. Chem Sci 2018; 9:7634-7641. [PMID: 30393524 PMCID: PMC6182566 DOI: 10.1039/c8sc02730g] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 08/12/2018] [Indexed: 01/29/2023] Open
Abstract
The double-faced Janus lectin, designed by assembling sialic acid and fucose-specific lectin, organize multivalent heteroglyco compounds in mulitlayered material, and glycosylated protocells in prototissues.
We engineered the first chimeric, bispecific lectin, with two rationally oriented and distinct recognition surfaces. This lectin, coined Janus lectin in allusion to the two-faced roman god, is able to bind independently to both fucosylated and sialylated glycoconjugates. The multivalent presentation of binding sites on each face of the Janus lectin is very efficient, resulting in avidities in the low nanomolar range for both fucosylated and sialylated surfaces. Moreover, novel heterovalent, bifunctional glycoclusters were synthetized that match the topology of the Janus lectin. Based on these tools, we constructed organized and controlled supramolecular architectures by assembling Janus lectin and glycocompound layer-by-layer. Furthermore, the Janus lectin was employed as biomolecular linker to organize protocells made from giant unilamellar vesicles of different nature, to more complex prototissues. In summary, tailor-made Janus lectins open wide possibilities for creating biomimetic matrices or artificial tissues.
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Affiliation(s)
- João P Ribeiro
- Univ. Grenoble Alpes , CNRS , CERMAV , 38000 Grenoble , France . .,Univ. Grenoble Alpes , CNRS , DCM , 38000 Grenoble , France
| | - Sarah Villringer
- Faculty of Biology , Albert-Ludwigs-University Freiburg , Centre for Biological Signalling Studies (BIOSS) , Schänzlestraße 18 , 79104 Freiburg , Germany .
| | - David Goyard
- Univ. Grenoble Alpes , CNRS , DCM , 38000 Grenoble , France
| | | | - Manuela Höferlin
- Faculty of Biology , Albert-Ludwigs-University Freiburg , Centre for Biological Signalling Studies (BIOSS) , Schänzlestraße 18 , 79104 Freiburg , Germany .
| | | | - Winfried Römer
- Faculty of Biology , Albert-Ludwigs-University Freiburg , Centre for Biological Signalling Studies (BIOSS) , Schänzlestraße 18 , 79104 Freiburg , Germany .
| | - Anne Imberty
- Univ. Grenoble Alpes , CNRS , CERMAV , 38000 Grenoble , France .
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Stuhr-Hansen N, Madl J, Villringer S, Aili U, Römer W, Blixt O. Inside Cover: Synthesis of Cholesterol-Substituted Glycopeptides for Tailor-Made Glycocalyxification of Artificial Membrane Systems (ChemBioChem 15/2016). Chembiochem 2016. [DOI: 10.1002/cbic.201600391] [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: 11/09/2022]
Affiliation(s)
- Nicolai Stuhr-Hansen
- Department of Chemistry; Chemical Biology; University of Copenhagen; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
| | - Josef Madl
- Albert-Ludwigs-University Freiburg; Faculty of Biology; Centre for Biological Signalling Studies (BIOSS) and; Freiburg Centre for Interactive Materials and Bioinspired Technology (FIT); Schänzlestrasse 18 79104 Freiburg Germany
| | - Sarah Villringer
- Albert-Ludwigs-University Freiburg; Faculty of Biology; Centre for Biological Signalling Studies (BIOSS) and; Freiburg Centre for Interactive Materials and Bioinspired Technology (FIT); Schänzlestrasse 18 79104 Freiburg Germany
| | - Ulrika Aili
- Department of Chemistry; Chemical Biology; University of Copenhagen; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
| | - Winfried Römer
- Albert-Ludwigs-University Freiburg; Faculty of Biology; Centre for Biological Signalling Studies (BIOSS) and; Freiburg Centre for Interactive Materials and Bioinspired Technology (FIT); Schänzlestrasse 18 79104 Freiburg Germany
| | - Ola Blixt
- Department of Chemistry; Chemical Biology; University of Copenhagen; Thorvaldsensvej 40 1871 Frederiksberg C Denmark
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Stuhr-Hansen N, Madl J, Villringer S, Aili U, Römer W, Blixt O. Synthesis of Cholesterol-Substituted Glycopeptides for Tailor-Made Glycocalyxification of Artificial Membrane Systems. Chembiochem 2016; 17:1403-6. [PMID: 27168414 DOI: 10.1002/cbic.201600258] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Indexed: 11/07/2022]
Abstract
Synthetic minimal membrane systems are extremely useful for better understanding of complex cellular structures and cell surface processes. We have developed a facile method for synthesis of cholesterylated peptides, each bearing a carbohydrate moiety and a fluorescent tag. The position of the cholesterol moiety on the peptide can be controlled by using a new Fmoc-protected cholesterol-triazole-lysine group, which we constructed by means of solid-phase peptide synthesis. We succeeded in integrating the glyco modules into giant unilamellar vesicles by electroformation or infusion in buffer solution. The glyco-decorated liposomes were recognized by a lectin and had unique topological membrane features. In conclusion, this work is a proof of principle for the functionalization of artificial membranes with a primitive synthetic glycocalyx useful for studying carbohydrate-protein interactions on a simplified cell-like membrane surface.
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Affiliation(s)
- Nicolai Stuhr-Hansen
- Department of Chemistry, Chemical Biology, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg C, Denmark
| | - Josef Madl
- Albert-Ludwigs-University Freiburg, Faculty of Biology, Centre for Biological Signalling Studies (BIOSS) and, Freiburg Centre for Interactive Materials and Bioinspired Technology (FIT), Schänzlestrasse 18, 79104, Freiburg, Germany
| | - Sarah Villringer
- Albert-Ludwigs-University Freiburg, Faculty of Biology, Centre for Biological Signalling Studies (BIOSS) and, Freiburg Centre for Interactive Materials and Bioinspired Technology (FIT), Schänzlestrasse 18, 79104, Freiburg, Germany
| | - Ulrika Aili
- Department of Chemistry, Chemical Biology, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg C, Denmark
| | - Winfried Römer
- Albert-Ludwigs-University Freiburg, Faculty of Biology, Centre for Biological Signalling Studies (BIOSS) and, Freiburg Centre for Interactive Materials and Bioinspired Technology (FIT), Schänzlestrasse 18, 79104, Freiburg, Germany
| | - Ola Blixt
- Department of Chemistry, Chemical Biology, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg C, Denmark.
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Kühn K, Cott C, Bohler S, Aigal S, Zheng S, Villringer S, Imberty A, Claudinon J, Römer W. The interplay of autophagy and β-Catenin signaling regulates differentiation in acute myeloid leukemia. Cell Death Discov 2015; 1:15031. [PMID: 27551462 PMCID: PMC4979480 DOI: 10.1038/cddiscovery.2015.31] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 08/03/2015] [Accepted: 08/07/2015] [Indexed: 12/18/2022] Open
Abstract
The major feature of leukemic cells is an arrest of differentiation accompanied by highly active proliferation. In many subtypes of acute myeloid leukemia, these features are mediated by the aberrant Wnt/β-Catenin pathway. In our study, we established the lectin LecB as inducer of the differentiation of the acute myeloid leukemia cell line THP-1 and used it for the investigation of the involved processes. During differentiation, functional autophagy and low β-Catenin levels were essential. Corresponding to this, a high β-Catenin level stabilized proliferation and inhibited autophagy, resulting in low differentiation ability. Initiated by LecB, β-Catenin was degraded, autophagy became active and differentiation took place within hours. Remarkably, the reduction of β-Catenin sensitized THP-1 cells to the autophagy-stimulating mTOR inhibitors. As downmodulation of E-Cadherin was sufficient to significantly reduce LecB-mediated differentiation, we propose E-Cadherin as a crucial interaction partner in this signaling pathway. Upon LecB treatment, E-Cadherin colocalized with β-Catenin and thereby prevented the induction of β-Catenin target protein expression and proliferation. That way, our study provides for the first time a link between E-Cadherin, the aberrant Wnt/β-Catenin signaling, autophagy and differentiation in acute myeloid leukemia. Importantly, LecB was a valuable tool to elucidate the underlying molecular mechanisms of acute myeloid leukemia pathogenesis and may help to identify novel therapy approaches.
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Affiliation(s)
- K Kühn
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraβe 1, 79104 Freiburg, Germany; BIOSS-Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany
| | - C Cott
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraβe 1, 79104 Freiburg, Germany; BIOSS-Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany
| | - S Bohler
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraβe 1, 79104 Freiburg, Germany; BIOSS-Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany
| | - S Aigal
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraβe 1, 79104 Freiburg, Germany; BIOSS-Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany; International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - S Zheng
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraβe 1, 79104 Freiburg, Germany; BIOSS-Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany
| | - S Villringer
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraβe 1, 79104 Freiburg, Germany; BIOSS-Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany
| | - A Imberty
- Centre de Recherches sur les Macromolécules Végétales (CERMAV), CNRS and Université Grenoble Alpes , 601 rue de la chimie, 38000 Grenoble, France
| | - J Claudinon
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraβe 1, 79104 Freiburg, Germany; BIOSS-Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany
| | - W Römer
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraβe 1, 79104 Freiburg, Germany; BIOSS-Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany
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