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Kałuża A, Trzęsicka K, Drzyzga D, Ferens-Sieczkowska M. Aberrant Mannosylated and Highly Fucosylated Glycoepitopes of Prostatic Acid Phosphatase as Potential Ligands for Dendritic-Cell Specific ICAM-Grabbing Nonintegrin (DC-SIGN) in Human Seminal Plasma-A Step towards Explaining Idiopathic Infertility. Biomolecules 2023; 14:58. [PMID: 38254658 PMCID: PMC10813591 DOI: 10.3390/biom14010058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 12/28/2023] [Accepted: 12/30/2023] [Indexed: 01/24/2024] Open
Abstract
Semen prostatic acid phosphatase (PAP) has been proposed as an endogenous ligand for dendritic cell-specific ICAM-3-grabbing nonintegrin (DC-SIGN), which plays a critical immuno-modulating role in maintaining homeostasis in the female reproductive tracts. In the current study, we assumed that semen PAP bears a set of fucosylated and mannosylated glycans, which may mediate the efficient binding of PAP to DC-SIGN. To investigate this hypothesis, we developed ELISA assays using Galanthus nivalis and Lotus tetragonolobus lectins capable of binding mannose-containing glycans or LewisX and LewisY motifs, respectively. In our assay with Galanthus nivalis, we detected that the relative reactivity of PAP mannose-presenting glycans in the normozoospermic idiopathic group was significantly higher than in the asthenozoospermic, oligozoospermic and oligoasthenozoospermic groups. Simultaneously, we observed slight differences in the relative reactivities of PAP glycans with Lotus tetragonolobus lectin among groups of patients with abnormal semen parameters. Subsequently, we examined whether DC-SIGN interacts with seminal plasma PAP glycans, and we detected a significantly higher relative reactivity in the normozoospermic group compared to the oligozoospermic group. Finally, we concluded that the significantly aberrant abundance of mannosylated functional groups of PAP among patients with semen disorders can suggest that PAP may thereby be engaged in modulating the immune response and promoting a tolerogenic response to male antigens in the female reproductive system.
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Affiliation(s)
- Anna Kałuża
- Department of Biochemistry and Immunochemistry, Division of Chemistry and Immunochemistry, Wroclaw Medical University, M. Skłodowskiej-Curie 48/50, 50-369 Wroclaw, Poland;
| | - Katarzyna Trzęsicka
- INVICTA, Research and Development Center, Polna 64, 81-740 Sopot, Poland; (K.T.); (D.D.)
| | - Damian Drzyzga
- INVICTA, Research and Development Center, Polna 64, 81-740 Sopot, Poland; (K.T.); (D.D.)
| | - Mirosława Ferens-Sieczkowska
- Department of Biochemistry and Immunochemistry, Division of Chemistry and Immunochemistry, Wroclaw Medical University, M. Skłodowskiej-Curie 48/50, 50-369 Wroclaw, Poland;
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Hu J, Hu X, Zeng Z, Zhang J, Li M, Geng F, Wu D. Interaction between a photoisomerizable azobenzene compound and alpha-lactalbumin: Spectroscopic and computational simulation studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 301:122965. [PMID: 37327501 DOI: 10.1016/j.saa.2023.122965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/18/2023]
Abstract
The combination of light and photoresponsive compounds provides a peculiar way of regulating biological systems. Azobenzene is a classical organic compound with photoisomerization properties. Exploring the interactions between azobenzene and proteins can deepen the biochemical applications of the azobenzene compounds. In this paper, the interaction of 4-[(2,6-dimethylphenyl)diazenyl]-3,5-dimethylphenol with alpha-lactalbumin was investigated by UV-Vis absorption spectra, multiple fluorescence spectra, computer simulations, and circular dichroism spectra. Most critically, the interaction differences between proteins and the trans- and cis-isomer of ligands have been analyzed and compared. Results showed that both isomers of ligands were bound to alpha-lactalbumin to form ground state complexes and statically quenched the steady-state fluorescence of alpha-lactalbumin. The van der Waals forces and hydrogen bonding dominated the binding; the difference is that the binding of the cis-isomer to alpha-lactalbumin is more rapidly stabilized, and the binding strength is greater than the trans-isomer. These binding differences were modeled and analyzed by molecular docking and kinetic simulations, and we found that both isomers bind through the hydrophobic aromatic cluster 2 of alpha-lactalbumin. However, the bent structure of the cis-isomer is more closely aligned with the construction of the aromatic cluster and may have contributed to the above differences.
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Affiliation(s)
- Jie Hu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Xia Hu
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Zhen Zeng
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Jing Zhang
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Mohan Li
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Fang Geng
- Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China
| | - Di Wu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China; Meat Processing Key Laboratory of Sichuan Province, School of Food and Biological Engineering, Chengdu University, Chengdu 610106, China.
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3
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Biagiotti G, Toniolo G, Albino M, Severi M, Andreozzi P, Marelli M, Kokot H, Tria G, Guerri A, Sangregorio C, Rojo J, Berti D, Marradi M, Cicchi S, Urbančič I, van Kooyk Y, Chiodo F, Richichi B. Simple engineering of hybrid cellulose nanocrystal-gold nanoparticles results in a functional glyconanomaterial with biomolecular recognition properties. NANOSCALE HORIZONS 2023; 8:776-782. [PMID: 36951189 DOI: 10.1039/d3nh00063j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Cellulose nanocrystal and gold nanoparticles are assembled, in a unique way, to yield a novel modular glyconanomaterial whose surface is then easily engineered with one or two different headgroups, by exploiting a robust click chemistry route. We demonstrate the potential of this approach by conjugating monosaccharide headgroups to the glyconanomaterial and show that the sugars retain their binding capability to C-type lectin receptors, as also directly visualized by cryo-TEM.
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Affiliation(s)
- Giacomo Biagiotti
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
| | - Gianluca Toniolo
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), 50121 Firenze, Italy
| | - Martin Albino
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
- ICCOM CNR via Madonna del Piano 10, 50019 Sesto Fiorentino (Firenze), Italy
| | - Mirko Severi
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
| | - Patrizia Andreozzi
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
| | - Marcello Marelli
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", SCITEC-CNR, Via G. Fantoli 16/15, 20138, Milano, Italy
| | - Hana Kokot
- Laboratory of Biophysics, Condensed Matter Physics Department, Jožef Stefan Institute, Jamova c. 39, 1000, Ljubljana, Slovenia
| | - Giancarlo Tria
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
| | - Annalisa Guerri
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
| | | | - Javier Rojo
- Glycosystems Laboratory, Instituto de Investigaciones Químicas (IIQ), CSIC - Universidad de Sevilla, Av. Américo Vespucio 49, Seville, 41092, Spain
| | - Debora Berti
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
- Italian Center for Colloid and Surface Science (CSGI), 50019 Sesto Fiorentino (Firenze), Italy
| | - Marco Marradi
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
| | - Stefano Cicchi
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), 50121 Firenze, Italy
| | - Iztok Urbančič
- Laboratory of Biophysics, Condensed Matter Physics Department, Jožef Stefan Institute, Jamova c. 39, 1000, Ljubljana, Slovenia
| | - Yvette van Kooyk
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands.
| | - Fabrizio Chiodo
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Amsterdam Infection and Immunity Institute, Amsterdam, The Netherlands.
- Institute of Biomolecular Chemistry, National Research Council (CNR), Pozzuoli, Napoli, Italy
| | - Barbara Richichi
- Department of Chemistry "Ugo Schiff", University of Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (Firenze), Italy.
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), 50121 Firenze, Italy
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Viljoen A, Vercellone A, Chimen M, Gaibelet G, Mazères S, Nigou J, Dufrêne YF. Nanoscale clustering of mycobacterial ligands and DC-SIGN host receptors are key determinants for pathogen recognition. SCIENCE ADVANCES 2023; 9:eadf9498. [PMID: 37205764 PMCID: PMC10198640 DOI: 10.1126/sciadv.adf9498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 04/14/2023] [Indexed: 05/21/2023]
Abstract
The bacterial pathogen Mycobacterium tuberculosis binds to the C-type lectin DC-SIGN (dendritic cell-specific intercellular adhesion molecule 3-grabbing nonintegrin) on dendritic cells to evade the immune system. While DC-SIGN glycoconjugate ligands are ubiquitous among mycobacterial species, the receptor selectively binds pathogenic species from the M. tuberculosis complex (MTBC). Here, we unravel the molecular mechanism behind this intriguing selective recognition by means of a multidisciplinary approach combining single-molecule atomic force microscopy with Förster resonance energy transfer and bioassays. Molecular recognition imaging of mycobacteria demonstrates that the distribution of DC-SIGN ligands markedly differs between Mycobacterium bovis Bacille Calmette-Guérin (BCG) (model MTBC species) and Mycobacterium smegmatis (non-MTBC species), the ligands being concentrated into dense nanodomains on M. bovis BCG. Upon bacteria-host cell adhesion, ligand nanodomains induce the recruitment and clustering of DC-SIGN. Our study highlights the key role of clustering of both ligands on MTBC species and DC-SIGN host receptors in pathogen recognition, a mechanism that might be widespread in host-pathogen interactions.
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Affiliation(s)
- Albertus Viljoen
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, Croix du Sud, 4-5, bte L7.07.07., B-1348 Louvain-la-Neuve, Belgium
| | - Alain Vercellone
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Myriam Chimen
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Gérald Gaibelet
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Serge Mazères
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Jérôme Nigou
- Institut de Pharmacologie et de Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UPS), Toulouse, France
| | - Yves F. Dufrêne
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, Croix du Sud, 4-5, bte L7.07.07., B-1348 Louvain-la-Neuve, Belgium
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5
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Mukherjee R, Somovilla VJ, Chiodo F, Bruijns S, Pieters RJ, Garssen J, van Kooyk Y, Kraneveld AD, van Bergenhenegouwen J. Human Milk Oligosaccharide 2'-Fucosyllactose Inhibits Ligand Binding to C-Type Lectin DC-SIGN but Not to Langerin. Int J Mol Sci 2022; 23:ijms232314745. [PMID: 36499067 PMCID: PMC9737664 DOI: 10.3390/ijms232314745] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/18/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
Human milk oligosaccharides (HMOs) and their most abundant component, 2'-Fucosyllactose (2'-FL), are known to be immunomodulatory. Previously, it was shown that HMOs and 2'-FL bind to the C-type lectin receptor DC-SIGN. Here we show, using a ligand-receptor competition assay, that a whole mixture of HMOs from pooled human milk (HMOS) and 2'-FL inhibit the binding of the carbohydrate-binding receptor DC-SIGN to its prototypical ligands, fucose and the oligosaccharide Lewis-B, (Leb) in a dose-dependent way. Interestingly, such inhibition by HMOS and 2'-FL was not detected for another C-type lectin, langerin, which is evolutionarily similar to DC-SIGN. The cell-ligand competition assay using DC-SIGN expressing cells confirmed that 2'-FL inhibits the binding of DC-SIGN to Leb. Molecular dynamic (MD) simulations show that 2'-FL exists in a preorganized bioactive conformation before binding to DC-SIGN and this conformation is retained after binding to DC-SIGN. Leb has more flexible conformations and utilizes two binding modes, which operate one at a time via its two fucoses to bind to DC-SIGN. Our hypothesis is that 2'-FL may have a reduced entropic penalty due to its preorganized state, compared to Leb, and it has a lower binding enthalpy, suggesting a better binding to DC-SIGN. Thus, due to the better binding to DC-SIGN, 2'-FL may replace Leb from its binding pocket in DC-SIGN. The MD simulations also showed that 2'-FL does not bind to langerin. Our studies confirm 2'-FL as a specific ligand for DC-SIGN and suggest that 2'-FL can replace other DC-SIGN ligands from its binding pocket during the ligand-receptor interactions in possible immunomodulatory processes.
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Affiliation(s)
- Reshmi Mukherjee
- Division of Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3508 TB Utrecht, The Netherlands
- Division of Chemical Biology and Drug Discovery, Utrecht Institute of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3508 TB Utrecht, The Netherlands
- Correspondence: (R.M.); (A.D.K.); Tel.: +31-686-088-526 (R.M.); +31-30-2534-509 (A.D.K.)
| | - Victor J. Somovilla
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramon 182, 20014 Donostia San Sebastián, Spain
| | - Fabrizio Chiodo
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Location Vrije Universiteit, Amsterdam Infection and Immunity Research Institute, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Sven Bruijns
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Location Vrije Universiteit, Amsterdam Infection and Immunity Research Institute, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Roland J. Pieters
- Division of Chemical Biology and Drug Discovery, Utrecht Institute of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3508 TB Utrecht, The Netherlands
| | - Johan Garssen
- Division of Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3508 TB Utrecht, The Netherlands
- Danone Nutricia Research, Uppsalalaan 12, 3584 CT Utrecht, The Netherlands
| | - Yvette van Kooyk
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Location Vrije Universiteit, Amsterdam Infection and Immunity Research Institute, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands
| | - Aletta D. Kraneveld
- Division of Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3508 TB Utrecht, The Netherlands
- Correspondence: (R.M.); (A.D.K.); Tel.: +31-686-088-526 (R.M.); +31-30-2534-509 (A.D.K.)
| | - Jeroen van Bergenhenegouwen
- Division of Pharmacology, Utrecht Institute of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, 3508 TB Utrecht, The Netherlands
- Danone Nutricia Research, Uppsalalaan 12, 3584 CT Utrecht, The Netherlands
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Wang J, Chen MS, Wang RS, Hu JQ, Liu S, Wang YYF, Xing XL, Zhang BW, Liu JM, Wang S. Current Advances in Structure-Function Relationships and Dose-Dependent Effects of Human Milk Oligosaccharides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:6328-6353. [PMID: 35593935 DOI: 10.1021/acs.jafc.2c01365] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
HMOs (human milk oligosaccharides) are the third most important nutrient in breast milk. As complex glycans, HMOs play an important role in regulating neonatal intestinal immunity, resisting viral and bacterial infections, displaying anti-inflammatory characteristics, and promoting brain development. Although there have been some previous reports of HMOs, a detailed literature review summarizing the structure-activity relationships and dose-dependent effects of HMOs is lacking. Hence, after introducing the structures and synthetic pathways of HMOs, this review summarizes and categorizes identified structure-function relationships of HMOs. Differential mechanisms of different structural HMOs utilization by microorganisms are summarized. This review also emphasizes the recent advances in the interactions between different health benefits and the variance of dosage effect based on in vitro cell tests, animal experiments, and human intervention studies. The potential relationships between the chemical structure, the dosage selection, and the physiological properties of HMOs as functional foods are vital for further understanding of HMOs and their future applications.
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Affiliation(s)
- Jin Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Meng-Shan Chen
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Rui-Shan Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Jia-Qiang Hu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Shuang Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Yuan-Yi-Fei Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Xiao-Long Xing
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Bo-Wei Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Jing-Min Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
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Gao M, Li H, Ye C, Chen K, Jiang H, Yu K. Glycan Epitopes and Potential Glycoside Antagonists of DC-SIGN Involved in COVID-19: In Silico Study. Biomolecules 2021; 11:1586. [PMID: 34827585 PMCID: PMC8615854 DOI: 10.3390/biom11111586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/19/2021] [Accepted: 10/19/2021] [Indexed: 12/28/2022] Open
Abstract
Glycosylation is an important post-translational modification that affects a wide variety of physiological functions. DC-SIGN (Dendritic Cell-Specific Intercellular adhesion molecule-3-Grabbing Non-integrin) is a protein expressed in antigen-presenting cells that recognizes a variety of glycan epitopes. Until now, the binding of DC-SIGN to SARS-CoV-2 Spike glycoprotein has been reported in various articles and is regarded to be a factor in systemic infection and cytokine storm. The mechanism of DC-SIGN recognition offers an alternative method for discovering new medication for COVID-19 treatment. Here, we discovered three potential pockets that hold different glycan epitopes by performing molecular dynamics simulations of previously reported oligosaccharides. The "EPN" motif, "NDD" motif, and Glu354 form the most critical pocket, which is known as the Core site. We proposed that the type of glycan epitopes, rather than the precise amino acid sequence, determines the recognition. Furthermore, we deduced that oligosaccharides could occupy an additional site, which adds to their higher affinity than monosaccharides. Based on our findings and previously described glycoforms on the SARS-CoV-2 Spike, we predicted the potential glycan epitopes for DC-SIGN. It suggested that glycan epitopes could be recognized at multiple sites, not just Asn234, Asn149 and Asn343. Subsequently, we found that Saikosaponin A and Liquiritin, two plant glycosides, were promising DC-SIGN antagonists in silico.
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Affiliation(s)
- Meina Gao
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China; (M.G.); (K.C.); (H.J.)
- Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China;
| | - Hui Li
- Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China;
- University of Chinese Academy of Sciences, Beijing 100049, China
- Shanghai Institute for Advanced Immunochemical Studies, School of Life Science and Technology, ShanghaiTech University, Shanghai 200031, China
| | - Chenghao Ye
- Department of Chemistry, Shantou University, Shantou 515063, China;
| | - Kaixian Chen
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China; (M.G.); (K.C.); (H.J.)
- Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China;
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hualiang Jiang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China; (M.G.); (K.C.); (H.J.)
- Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China;
- University of Chinese Academy of Sciences, Beijing 100049, China
- Shanghai Institute for Advanced Immunochemical Studies, School of Life Science and Technology, ShanghaiTech University, Shanghai 200031, China
| | - Kunqian Yu
- Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 200031, China;
- University of Chinese Academy of Sciences, Beijing 100049, China
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8
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Wichit S, Gumpangseth N, Hamel R, Yainoy S, Arikit S, Punsawad C, Missé D. Chikungunya and Zika Viruses: Co-Circulation and the Interplay between Viral Proteins and Host Factors. Pathogens 2021; 10:448. [PMID: 33918691 PMCID: PMC8068860 DOI: 10.3390/pathogens10040448] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/03/2021] [Accepted: 04/06/2021] [Indexed: 12/14/2022] Open
Abstract
Chikungunya and Zika viruses, both transmitted by mosquito vectors, have globally re-emerged over for the last 60 years and resulted in crucial social and economic concerns. Presently, there is no specific antiviral agent or vaccine against these debilitating viruses. Understanding viral-host interactions is needed to develop targeted therapeutics. However, there is presently limited information in this area. In this review, we start with the updated virology and replication cycle of each virus. Transmission by similar mosquito vectors, frequent co-circulation, and occurrence of co-infection are summarized. Finally, the targeted host proteins/factors used by the viruses are discussed. There is an urgent need to better understand the virus-host interactions that will facilitate antiviral drug development and thus reduce the global burden of infections caused by arboviruses.
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Affiliation(s)
- Sineewanlaya Wichit
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom 73170, Thailand; (N.G.); (S.Y.)
- School of Medicine, Walailak University, Nakhon Si Thammarat 80160, Thailand;
| | - Nuttamonpat Gumpangseth
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom 73170, Thailand; (N.G.); (S.Y.)
| | - Rodolphe Hamel
- MIVEGEC, Univ. Montpellier, CNRS, IRD, Montpellier, France; (R.H.); (D.M.)
| | - Sakda Yainoy
- Department of Clinical Microbiology and Applied Technology, Faculty of Medical Technology, Mahidol University, Nakhon Pathom 73170, Thailand; (N.G.); (S.Y.)
| | - Siwaret Arikit
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand;
| | - Chuchard Punsawad
- School of Medicine, Walailak University, Nakhon Si Thammarat 80160, Thailand;
| | - Dorothée Missé
- MIVEGEC, Univ. Montpellier, CNRS, IRD, Montpellier, France; (R.H.); (D.M.)
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Chen K, Yang R, Shen FQ, Zhu HL. Advances in Pharmacological Activities and Mechanisms of Glycyrrhizic Acid. Curr Med Chem 2021; 27:6219-6243. [PMID: 31612817 DOI: 10.2174/0929867325666191011115407] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 09/09/2019] [Accepted: 09/18/2019] [Indexed: 12/21/2022]
Abstract
Licorice (Glycyrrhiza glabra L.) is widely regarded as an important medicinal plant and has been used for centuries in traditional medicine because of its therapeutic properties. Studies have shown that metabolites isolated from licorice have many pharmacological activities, such as antiinflammatory, anti-viral, participation in immune regulation, anti-tumor and other activities. This article gives an overview of the pharmacological activities and mechanisms of licorice metabolites and the adverse reactions that need attention. This review helps to further investigate the possibility of licorice as a potential drug for various diseases. It is hoped that this review can provide a relevant theoretical basis for relevant scholars' research and their own learning.
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Affiliation(s)
- Kun Chen
- The Joint Research Center of Guangzhou University and Keele Univeristy for Gene Interference and
Application, School of Life Science, Guangzhou University, Guangzhou 510006, People’s Republic of China,State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University,
Nanjing 210023, People’s Republic of China
| | - Rong Yang
- The Joint Research Center of Guangzhou University and Keele Univeristy for Gene Interference and
Application, School of Life Science, Guangzhou University, Guangzhou 510006, People’s Republic of China,State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University,
Nanjing 210023, People’s Republic of China
| | - Fa-Qian Shen
- The Joint Research Center of Guangzhou University and Keele Univeristy for Gene Interference and
Application, School of Life Science, Guangzhou University, Guangzhou 510006, People’s Republic of China,State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University,
Nanjing 210023, People’s Republic of China
| | - Hai-Liang Zhu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University,
Nanjing 210023, People’s Republic of China
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10
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Sales Pereira LH, Alves ADC, Siqueira Ferreira JM, Dos Santos LL. Soluble DC-SIGN isoforms: Ligands with unknown functions - A mini-review. Microb Pathog 2021; 150:104731. [PMID: 33429051 DOI: 10.1016/j.micpath.2021.104731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 12/23/2020] [Accepted: 12/27/2020] [Indexed: 12/01/2022]
Abstract
The present study aimed to perform a mini-review of the complete soluble isoforms of Dendritic Cell-Specific Intercellular adhesion molecule-3-Grabbing Non-integrin (sDC-SIGN), their functions, and their correlation with diseases. The present review reveals the lack of studies regarding these soluble isoforms and poor understanding of the importance of the topic, considering the concordant findings on the relevant influence of sDC-SIGN in the viral and bacterial infection process, in addition to its possible use as a cancer marker.
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Affiliation(s)
- Lailah Horácio Sales Pereira
- Laboratório de Biologia Molecular, Universidade Federal de São João Del Rei (UFSJ), Divinopolis, Minas Gerais, Brazil; Laboratório de Virologia, Universidade Federal de São João Del Rei (UFSJ), Divinopolis, Minas Gerais, Brazil.
| | - Amanda do Carmo Alves
- Laboratório de Biologia Molecular, Universidade Federal de São João Del Rei (UFSJ), Divinopolis, Minas Gerais, Brazil.
| | | | - Luciana Lara Dos Santos
- Laboratório de Biologia Molecular, Universidade Federal de São João Del Rei (UFSJ), Divinopolis, Minas Gerais, Brazil.
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11
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Innate Immune Pattern Recognition Receptors of Mycobacterium tuberculosis: Nature and Consequences for Pathogenesis of Tuberculosis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1313:179-215. [PMID: 34661896 DOI: 10.1007/978-3-030-67452-6_9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Innate immunity against Mycobacterium tuberculosis is a critical early response to prevent the establishment of the infection. Despite recent advances in understanding the host-pathogen dialogue in the early stages of tuberculosis (TB), much has yet to be learnt. The nature and consequences of this dialogue ultimately determine the path of infection: namely, either early clearance of M. tuberculosis, or establishment of M. tuberculosis infection leading to active TB disease and/or latent TB infection. On the frontline in innate immunity are pattern recognition receptors (PRRs), with soluble factors (e.g. collectins and complement) and cell surface factors (e.g. Toll-like receptors and other C-type lectin receptors (Dectin 1/2, Nod-like receptors, DC-SIGN, Mincle, mannose receptor, and MCL) that play a central role in recognising M. tuberculosis and facilitating its clearance. However, in a 'double-edged sword' scenario, these factors can also be involved in enhancement of pathogenesis as well. Furthermore, innate immunity is also a critical bridge in establishing the subsequent adaptive immune response, which is also responsible for granuloma formation that cordons off M. tuberculosis infection, establishing latency and acting as a reservoir for bacterial persistence and dissemination of future disease. This chapter discusses the current understanding of pattern recognition of M. tuberculosis by innate immunity and the role this plays in the pathogenesis and protection against TB.
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12
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Doelman W, Marqvorsen MHS, Chiodo F, Bruijns SCM, van der Marel GA, van Kooyk Y, van Kasteren SI, Araman C. Synthesis of Asparagine Derivatives Harboring a Lewis X Type DC-SIGN Ligand and Evaluation of their Impact on Immunomodulation in Multiple Sclerosis. Chemistry 2020; 27:2742-2752. [PMID: 33090600 PMCID: PMC7898482 DOI: 10.1002/chem.202004076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Indexed: 01/13/2023]
Abstract
The protein myelin oligodendrocyte glycoprotein (MOG) is a key component of myelin and an autoantigen in the disease multiple sclerosis (MS). Post‐translational N‐glycosylation of Asn31 of MOG seems to play a key role in modulating the immune response towards myelin. This is mediated by the interaction of Lewis‐type glycan structures in the N‐glycan of MOG with the DC‐SIGN receptor on dendritic cells (DCs). Here, we report the synthesis of an unnatural Lewis X (LeX)‐containing Fmoc‐SPPS‐compatible asparagine building block (SPPS=solid‐phase peptide synthesis), as well as asparagine building blocks containing two LeX‐derived oligosaccharides: LacNAc and Fucα1‐3GlcNAc. These building blocks were used for the glycosylation of the immunodominant portion of MOG (MOG31‐55) and analyzed with respect to their ability to bind to DC‐SIGN in different biological setups, as well as their ability to inhibit the citrullination‐induced aggregation of MOG31‐55. Finally, a cytokine secretion assay was carried out on human monocyte‐derived DCs, which showed the ability of the neoglycopeptide decorated with a single LeX to alter the balance of pro‐ and anti‐inflammatory cytokines, inducing a tolerogenic response.
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Affiliation(s)
- Ward Doelman
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Mikkel H S Marqvorsen
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Fabrizio Chiodo
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC-Location Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Sven C M Bruijns
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC-Location Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Gijsbert A van der Marel
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Yvette van Kooyk
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC-Location Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ, Amsterdam, The Netherlands
| | - Sander I van Kasteren
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Can Araman
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
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13
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Rahimi N. C-type Lectin CD209L/L-SIGN and CD209/DC-SIGN: Cell Adhesion Molecules Turned to Pathogen Recognition Receptors. BIOLOGY 2020; 10:1. [PMID: 33375175 PMCID: PMC7822156 DOI: 10.3390/biology10010001] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/14/2020] [Accepted: 12/16/2020] [Indexed: 12/19/2022]
Abstract
C-type lectin CD209/DC-SIGN and CD209L/L-SIGN proteins are distinct cell adhesion and pathogen recognition receptors that mediate cellular interactions and recognize a wide range of pathogens, including viruses such as SARS, SARS-CoV-2, bacteria, fungi and parasites. Pathogens exploit CD209 family proteins to promote infection and evade the immune recognition system. CD209L and CD209 are widely expressed in SARS-CoV-2 target organs and can contribute to infection and pathogenesis. CD209 family receptors are highly susceptible to alternative splicing and genomic polymorphism, which may influence virus tropism and transmission in vivo. The carbohydrate recognition domain (CRD) and the neck/repeat region represent the key features of CD209 family proteins that are also central to facilitating cellular ligand interactions and pathogen recognition. While the neck/repeat region is involved in oligomeric dimerization, the CRD recognizes the mannose-containing structures present on specific glycoproteins such as those found on the SARS-CoV-2 spike protein. Considering the role of CD209L and related proteins in diverse pathogen recognition, this review article discusses the recent advances in the cellular and biochemical characterization of CD209 and CD209L and their roles in viral uptake, which has important implications in understanding the host-pathogen interaction, the viral pathobiology and driving vaccine development of SARS-CoV-2.
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Affiliation(s)
- Nader Rahimi
- Department of Pathology, School of Medicine, Boston University Medical Campus, Boston, MA 02118, USA
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14
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Srivastava AD, Unione L, Wolfert MA, Valverde P, Ardá A, Jiménez-Barbero J, Boons GJ. Mono- and Di-Fucosylated Glycans of the Parasitic Worm S. mansoni are Recognized Differently by the Innate Immune Receptor DC-SIGN. Chemistry 2020; 26:15605-15612. [PMID: 32957164 PMCID: PMC7894523 DOI: 10.1002/chem.202002619] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/06/2020] [Indexed: 12/13/2022]
Abstract
The parasitic worm, Schistosoma mansoni, expresses unusual fucosylated glycans in a stage-dependent manner that can be recognized by the human innate immune receptor DC-SIGN, thereby shaping host immune responses. We have developed a synthetic approach for mono- and bis-fucosylated LacdiNAc (LDN-F and LDN-DF, respectively), which are epitopes expressed on glycolipids and glycoproteins of S. mansoni. It is based on the use of monosaccharide building blocks having carefully selected amino-protecting groups, facilitating high yielding and stereoselective glycosylations. The molecular interaction between the synthetic glycans and DC-SIGN was studied by NMR and molecular modeling, which demonstrated that the α1,3-fucoside of LDN-F can coordinate with the Ca2+ -ion of the canonical binding site of DC-SIGN allowing for additional interactions with the underlying LDN backbone. The 1,2-fucoside of LDN-DF can be complexed in a similar manner, however, in this binding mode GlcNAc and GalNAc of the LDN backbone are placed away from the protein surface resulting in a substantially lower binding affinity. Glycan microarray binding studies showed that the avidity and selectivity of binding is greatly enhanced when the glycans are presented multivalently, and in this format Lex and LDN-F gave strong responsiveness, whereas no binding was detected for LDN-DF. The data indicates that S. mansoni has developed a strategy to avoid detection by DC-SIGN in a stage-dependent manner by the addition of a fucoside to a number of its ligands.
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Affiliation(s)
- Apoorva D Srivastava
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, Netherlands
| | - Luca Unione
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, Netherlands
| | - Margreet A Wolfert
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, Netherlands
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA, 30602, USA
| | - Pablo Valverde
- Molecular Recognition and Host-Pathogen Interactions, CIC bioGUNE, Bizkaia Technology Park, Building 800, 48162, Derio, Bizkaia, Spain
| | - Ana Ardá
- Molecular Recognition and Host-Pathogen Interactions, CIC bioGUNE, Bizkaia Technology Park, Building 800, 48162, Derio, Bizkaia, Spain
| | - Jesús Jiménez-Barbero
- Molecular Recognition and Host-Pathogen Interactions, CIC bioGUNE, Bizkaia Technology Park, Building 800, 48162, Derio, Bizkaia, Spain
- Basque Foundation for Science, Ikerbasque, 48013, Bilbao, Bizkaia, Spain
- Department of Organic Chemistry II, UPV/EHU, University of the Basque Country, 48940, Leioa, Bizkaia, Spain
| | - Geert-Jan Boons
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Bijvoet Center for Biomolecular Research, Utrecht University, Universiteitsweg 99, 3584, CG, Utrecht, Netherlands
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA, 30602, USA
- Department of Chemistry, University of Georgia, Athens, GA, 30602, USA
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15
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Soayfane Z, Houshaymi B, Kedees MH, Belec L, Nasreddine N. Cell Proteins Interacting with the Human Immunodeficiency Virus in Immunoblotting can be Detected by R5- or X4- Tropic Human Immunodeficiency Virus Particles. Int J Appl Basic Med Res 2020; 10:81-85. [PMID: 32566522 PMCID: PMC7289202 DOI: 10.4103/ijabmr.ijabmr_398_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/27/2019] [Accepted: 01/06/2020] [Indexed: 12/01/2022] Open
Abstract
Introduction: The present study reported a new immunoblot assay, with revelation by R5- or X4-whole free human immunodeficiency virus (HIV) particles or recombinant gp160. Materials and Methods: The assay was optimized to identify cell proteins interacting with HIV. Whole cell lysates were prepared from peripheral blood lymphocytes (PBLs), dendritic cells (DC), monocyte-derived macrophage (MDM), and Henrietta Lacks (Hela, wild-type or transfected with DC-specific intracellular adhesion molecule-3-Grabbing Non-Integrin, HeLa) and Human endometrial cells (HEC-1A) lines; HIV particles used were the R5-tropic HIV-1JRCSF and the X4-tropic HIV-1NDK. Results: Experiments with PBL lysates and both viruses demonstrated different bands, including a unique band at 105–117 kDa in addition to nonspecific bands. The 105–117 kDa band migrated at the same level of that observed in controls using total PBL lysate and anti-CD4 mAb for detection and thus likely corresponds to the cluster difference (CD) 4 complex. Blots using lysates of DCs, MDM, HeLa cell line, and HEC-1A cell line allowed identifying several bands that positions were similar to that seen by recombinant gp160 or whole R5- or X4-HIV particles. Conclusion: Blot of whole lysates of various HIV target cells is recognized by free HIV particles and allows identifying a wide range of HIV-interacting cell proteins. Such optimized assay could be useful to recognize new cellular HIV attachment proteins.
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Affiliation(s)
- Zeina Soayfane
- Department of Cell Biology, Faculty of Science, Lebanese University, Beirut, Lebanon
| | - Bilal Houshaymi
- Department of Microbiology, Faculty of Health, Lebanese University, Beirut, Lebanon
| | - Mamdouh H Kedees
- Department of Cell Biology, State University of New York, New York, NY, USA
| | - Laurent Belec
- Virology Lab, Georges Pompidou European Hospital, and University of Paris Descartes, Paris, France
| | - Nadine Nasreddine
- Department of Microbiology, Faculty of Health, Lebanese University, Beirut, Lebanon
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16
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Zhang T, van Die I, Tefsen B, van Vliet SJ, Laan LC, Zhang J, Ten Dijke P, Wuhrer M, Belo AI. Differential O- and Glycosphingolipid Glycosylation in Human Pancreatic Adenocarcinoma Cells With Opposite Morphology and Metastatic Behavior. Front Oncol 2020; 10:732. [PMID: 32582529 PMCID: PMC7280451 DOI: 10.3389/fonc.2020.00732] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 04/16/2020] [Indexed: 01/15/2023] Open
Abstract
Changes in the glycosylation profile of cancer cells have been strongly associated with cancer progression. To increase our insights into the role of glycosylation in human pancreatic ductal adenocarcinoma (PDAC), we performed a study on O-glycans and glycosphingolipid (GSL) glycans of the PDAC cell lines Pa-Tu-8988T (PaTu-T) and Pa-Tu-8988S (PaTu-S). These cell lines are derived from the same patient, but show an almost opposite phenotype, morphology and capacity to metastasize, and may thus provide an attractive model to study the role of glycosylation in progression of PDAC. Gene-array analysis revealed that 24% of the glycosylation-related genes showed a ≥ 1.5-fold difference in expression level between the two cell lines. Subsequent validation of the data by porous graphitized carbon nano-liquid chromatography coupled to a tandem ion trap mass spectrometry and flow cytometry established major differences in O-glycans and GSL-glycans between the cell lines, including lower levels of T and sialylated Tn (sTn) antigens, neoexpression of globosides (Gb3 and Gb4), and higher levels of gangliosides in the mesenchymal-like PaTu-T cells compared to the epithelial-like PaTu-S. In addition, PaTu-S cells demonstrated a significantly higher binding of the immune-lectins macrophage galactose-type lectin and galectin-4 compared to PaTu-T. In summary, our data provide a comprehensive and differential glycan profile of two PDAC cell lines with disparate phenotypes and metastatic behavior. This will allow approaches to modulate and monitor the glycosylation of these PDAC cell lines, which opens up avenues to study the biology and metastatic behavior of PDAC.
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Affiliation(s)
- Tao Zhang
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Irma van Die
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Boris Tefsen
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.,Department of Biological Sciences, Xi'an Jiaotong-Liverpool University, Suzhou, China
| | - Sandra J van Vliet
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Lisa C Laan
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Jing Zhang
- Department of Cell and Chemical Biology and Oncode Institute, Leiden University Medical Center, Leiden, Netherlands
| | - Peter Ten Dijke
- Department of Cell and Chemical Biology and Oncode Institute, Leiden University Medical Center, Leiden, Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Ana I Belo
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
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17
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Li RJE, Hogervorst TP, Achilli S, Bruijns SC, Arnoldus T, Vivès C, Wong CC, Thépaut M, Meeuwenoord NJ, van den Elst H, Overkleeft HS, van der Marel GA, Filippov DV, van Vliet SJ, Fieschi F, Codée JDC, van Kooyk Y. Systematic Dual Targeting of Dendritic Cell C-Type Lectin Receptor DC-SIGN and TLR7 Using a Trifunctional Mannosylated Antigen. Front Chem 2019; 7:650. [PMID: 31637232 PMCID: PMC6787163 DOI: 10.3389/fchem.2019.00650] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 09/11/2019] [Indexed: 01/22/2023] Open
Abstract
Dendritic cells (DCs) are important initiators of adaptive immunity, and they possess a multitude of Pattern Recognition Receptors (PRR) to generate an adequate T cell mediated immunity against invading pathogens. PRR ligands are frequently conjugated to tumor-associated antigens in a vaccination strategy to enhance the immune response toward such antigens. One of these PPRs, DC-SIGN, a member of the C-type lectin receptor (CLR) family, has been extensively targeted with Lewis structures and mannose glycans, often presented in multivalent fashion. We synthesized a library of well-defined mannosides (mono-, di-, and tri-mannosides), based on known "high mannose" structures, that we presented in a systematically increasing number of copies (n = 1, 2, 3, or 6), allowing us to simultaneously study the effect of mannoside configuration and multivalency on DC-SIGN binding via Surface Plasmon Resonance (SPR) and flow cytometry. Hexavalent presentation of the clusters showed the highest binding affinity, with the hexa-α1,2-di-mannoside being the most potent ligand. The four highest binding hexavalent mannoside structures were conjugated to a model melanoma gp100-peptide antigen and further equipped with a Toll-like receptor 7 (TLR7)-agonist as adjuvant for DC maturation, creating a trifunctional vaccine conjugate. Interestingly, DC-SIGN affinity of the mannoside clusters did not directly correlate with antigen presentation enhancing properties and the α1,2-di-mannoside cluster with the highest binding affinity in our library even hampered T cell activation. Overall, this systematic study has demonstrated that multivalent glycan presentation can improve DC-SIGN binding but enhanced binding cannot be directly translated into enhanced antigen presentation and the sole assessment of binding affinity is thus insufficient to determine further functional biological activity. Furthermore, we show that well-defined antigen conjugates combining two different PRR ligands can be generated in a modular fashion to increase the effectiveness of vaccine constructs.
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Affiliation(s)
- Rui-Jun Eveline Li
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Tim P. Hogervorst
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Silvia Achilli
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, Grenoble, France
| | - Sven C. Bruijns
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Tim Arnoldus
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Corinne Vivès
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, Grenoble, France
| | - Chung C. Wong
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Michel Thépaut
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, Grenoble, France
| | - Nico J. Meeuwenoord
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Hans van den Elst
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Herman S. Overkleeft
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Gijs A. van der Marel
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Dmitri V. Filippov
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Sandra J. van Vliet
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Franck Fieschi
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, Grenoble, France
| | - Jeroen D. C. Codée
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Yvette van Kooyk
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
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18
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Chéneau C, Coulon F, Porkolab V, Fieschi F, Laurant S, Razanajaona-Doll D, Pin JJ, Borst EM, Messerle M, Bressollette-Bodin C, Halary F. Fine Mapping the Interaction Between Dendritic Cell-Specific Intercellular Adhesion Molecule (ICAM)-3-Grabbing Nonintegrin and the Cytomegalovirus Envelope Glycoprotein B. J Infect Dis 2019; 218:490-503. [PMID: 29648611 PMCID: PMC6049025 DOI: 10.1093/infdis/jiy194] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 04/03/2018] [Indexed: 12/22/2022] Open
Abstract
Background Human cytomegalovirus (HCMV) is a leading cause of virally induced congenital disorders and morbidities in immunocompromised individuals, ie, transplant, cancer, or acquired immune deficiency syndrome patients. Human cytomegalovirus infects virtually all cell types through the envelope glycoprotein complex gH/gL/gO with or without a contribution of the pentameric gH/gL/pUL128L. Together with gH/gL, the HCMV envelope glycoprotein B (gB) contributes to the viral fusion machinery. Methods We previously showed that gB is a ligand for the C-type lectin dendritic cell-specific intercellular adhesion molecule-3-grabbing nonintegrin (DC-SIGN) contributing to HCMV attachment to and infection of DC-SIGN-expressing cells. However, the features of the DC-SIGN/gB interaction remain unclear. To address this point, the role of glycans on gB and the consequences of mutagenesis and antibody-mediated blockades on both partners were examined in this study. Results We identified DC-SIGN amino acid residues involved in this interaction through an extensive mutagenesis study. We also showed the importance of high-mannose N-glycans decorating the asparagine residue at position 208, demonstrating that the antigenic domain 5 on gB is involved in the interaction with DC-SIGN. Finally, antibody-mediated blockades allowed us to identify DC-SIGN as a major HCMV attachment receptor on monocyte-derived dendritic cells. Conclusions Taken together, these results have permitted us to fine-map the interaction between DC-SIGN and HCMV gB.
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Affiliation(s)
- Coraline Chéneau
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, France.,Institut de Transplantation Urologie Néphrologie, Centre Hospitalier Universitaire (CHU) Nantes, France
| | - Flora Coulon
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, France.,Institut de Transplantation Urologie Néphrologie, Centre Hospitalier Universitaire (CHU) Nantes, France
| | - Vanessa Porkolab
- Université Grenoble Alpes, Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Institute de Biologie Structurale, Grenoble, France
| | - Franck Fieschi
- Université Grenoble Alpes, Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Institute de Biologie Structurale, Grenoble, France
| | | | | | | | - Eva Maria Borst
- Institute of Virology, Hannover Medical School, Hannover, Germany
| | - Martin Messerle
- Institute of Virology, Hannover Medical School, Hannover, Germany
| | - Céline Bressollette-Bodin
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, France.,Institut de Transplantation Urologie Néphrologie, Centre Hospitalier Universitaire (CHU) Nantes, France.,Service de Virologie Clinique, CHU Hotel Dieu, Nantes, France
| | - Franck Halary
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, France.,Institut de Transplantation Urologie Néphrologie, Centre Hospitalier Universitaire (CHU) Nantes, France
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19
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Glycan-Modified Apoptotic Melanoma-Derived Extracellular Vesicles as Antigen Source for Anti-Tumor Vaccination. Cancers (Basel) 2019; 11:cancers11091266. [PMID: 31466401 PMCID: PMC6769957 DOI: 10.3390/cancers11091266] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 08/16/2019] [Accepted: 08/21/2019] [Indexed: 02/06/2023] Open
Abstract
Tumors that lack T cell infiltration are less likely to respond to immune checkpoint inhibition and could benefit from cancer vaccination for the initiation of anti-tumor T cell responses. An attractive vaccine strategy is in vivo targeting of dendritic cells (DCs), key initiators of antigen-specific T cell responses. In this study we generated tumor-derived apoptotic extracellular vesicles (ApoEVs), which are potentially an abundant source of tumor-specific neo-antigens and other tumor-associated antigens (TAAs), and which can be manipulated to express DC-targeting ligands for efficient antigen delivery. Our data demonstrates that by specifically modifying the glycocalyx of tumor cells, high-mannose glycans can be expressed on their cell surface and on extracellular vesicles derived after the induction of apoptosis. High-mannose glycans are the natural ligands of dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN), a dendritic cell associated C-type lectin receptor (CLR), which has the ability to efficiently internalize its cargo and direct it to both major histocompatibility complex (MHC)-I and MHC-II pathways for the induction of CD8+ and CD4+ T cell responses, respectively. Compared to unmodified ApoEVs, ApoEVs carrying DC-SIGN ligands are internalized to a higher extent, resulting in enhanced priming of tumor-specific CD8+ T cells. This approach thus presents a promising vaccination strategy in support of T cell-based immunotherapy of cancer.
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20
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Assays with recombinant soluble isoforms of DC-SIGN, a dengue virus ligand, show variation in their ability to bind to mannose residues. Arch Virol 2019; 164:2793-2797. [PMID: 31440811 DOI: 10.1007/s00705-019-04377-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 07/18/2019] [Indexed: 10/26/2022]
Abstract
The DC-SIGN glycoprotein is responsible for the initial adhesion of dengue virus (DENV) to immune cells by the carbohydrate recognition domain (CRD). There are thirteen soluble and membrane-bound DC-SIGN isoforms, but the role of soluble isoforms in the DENV internalization process is not known. Five isoforms with an altered or absent CRD were identified, and three different soluble isoforms were used to confirm the interactions with mannose residues. The results show the loss of binding ability of one soluble isoform and binding ability of two of them. All of them will be used to verify their role in the DENV internalization process.
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21
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Duinkerken S, Horrevorts SK, Kalay H, Ambrosini M, Rutte L, de Gruijl TD, Garcia-Vallejo JJ, van Kooyk Y. Glyco-Dendrimers as Intradermal Anti-Tumor Vaccine Targeting Multiple Skin DC Subsets. Theranostics 2019; 9:5797-5809. [PMID: 31534520 PMCID: PMC6735376 DOI: 10.7150/thno.35059] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 06/21/2019] [Indexed: 12/21/2022] Open
Abstract
The human skin is an attractive anti-tumor vaccination site due to the vast network of dendritic cell (DC) subsets that carry antigens to the draining lymph nodes and stimulate tumor specific CD4+ and CD8+ T cells in. Specific vaccine delivery to skin DC can be accomplished by targeting glycan coated antigens to C-type lectin receptors (CLRs) such as DC-SIGN expressed by human dermal DCs and Langerin expressed by Langerhans cells (LCs), which facilitate endocytosis and processing for antigen presentation and T cell activation. Although there are multiple human skin DC subsets, targeting individual DC subsets and receptors has been a focus in the past. However, the simultaneous targeting of multiple human skin DC subsets that mobilize the majority of the skin antigen presenting cells (APC) is preferred to accomplish more robust and efficient T cell stimulation. Dual CLR targeting using a single tumor vaccine has been difficult, as we previously showed Langerin to favor binding and uptake of monovalent glyco-peptides whereas DC-SIGN favors binding of larger multivalent glyco-particles such as glyco-liposomes. Methods: We used branched polyamidoamine (PAMAM) dendrimers as scaffold for melanoma specific gp100 synthetic long peptides and the common DC-SIGN and Langerin ligand Lewis Y (LeY), to create multivalent glyco-dendrimers with varying molecular weights for investigating dual DC-SIGN and Langerin targeting. Using DC-SIGN+ monocyte derived DC (moDC) and Langerin+ primary LC we investigated glyco-dendrimer CLR targeting properties and subsequent gp100 specific CD8+ T cell activation in vitro. In situ targeting ability to human dermal DC and LC through intradermal injection in a human skin explant model was elucidated. Results: Dual DC-SIGN and Langerin binding was achieved using glyco-dendrimers of approximately 100kD, thereby fulfilling our criteria to simultaneously target LCs and CD1a+ and CD14+ dermal DC in situ. Both DC-SIGN and Langerin targeting by glyco-dendrimers resulted in enhanced internalization and gp100 specific CD8+ T cell activation. Conclusion: We designed the first glyco-vaccine with dual CLR targeting properties, thereby reaching multiple human skin DC subsets in situ for improved anti-tumor CD8+ T cell responses.
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22
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Valverde P, Delgado S, Martínez JD, Vendeville JB, Malassis J, Linclau B, Reichardt NC, Cañada FJ, Jiménez-Barbero J, Ardá A. Molecular Insights into DC-SIGN Binding to Self-Antigens: The Interaction with the Blood Group A/B Antigens. ACS Chem Biol 2019; 14:1660-1671. [PMID: 31283166 PMCID: PMC6646960 DOI: 10.1021/acschembio.9b00458] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
![]()
The
dendritic cell-specific intracellular adhesion molecule-3-grabbing
nonintegrin (DC-SIGN) is an important receptor of the immune system.
Besides its role as pathogen recognition receptor (PRR), it also interacts
with endogenous glycoproteins through the specific recognition of
self-glycan epitopes, like LeX. However, this lectin represents
a paradigmatic case of glycan binding promiscuity, and it also has
been shown to recognize antigens with α1−α2 linked
fucose, such as the histo blood group antigens, with similar affinities
to LeX. Herein, we have studied the interaction in solution
between DC-SIGN and the blood group A and B antigens, to get insights
into the atomic details of such interaction. With a combination of
different NMR experiments, we demonstrate that the Fuc coordinates
the primary Ca2+ ion with a single binding mode through
3-OH and 4-OH. The terminal αGal/αGalNAc affords marginal
direct polar contacts with the protein, but provides a hydrophobic
hook in which V351 of the lectin perfectly fits. Moreover, we have
found that αGal, but not αGalNAc, is a weak binder itself
for DC-SIGN, which could endow an additional binding mode for the
blood group B antigen, but not for blood group A.
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Affiliation(s)
- Pablo Valverde
- CIC bioGUNE, Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia, Spain
| | - Sandra Delgado
- CIC bioGUNE, Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia, Spain
| | - J. Daniel Martínez
- CIC bioGUNE, Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia, Spain
| | | | - Julien Malassis
- School of Chemistry, University of Southampton Highfield, Southampton SO17 1BJ, United Kingdom
| | - Bruno Linclau
- School of Chemistry, University of Southampton Highfield, Southampton SO17 1BJ, United Kingdom
| | | | | | - Jesús Jiménez-Barbero
- CIC bioGUNE, Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia, Spain
- Ikerbasque, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Bizkaia, Spain
- Department of Organic Chemistry II Faculty of Science and Technology, University of the Basque Country, EHU-UPV, Leioa, Spain
| | - Ana Ardá
- CIC bioGUNE, Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia, Spain
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Immobilization of β-galactosidase and α-mannosidase onto magnetic nanoparticles: A strategy for increasing the potentiality of valuable glycomic tools for glycosylation analysis and biological role determination of glycoconjugates. Enzyme Microb Technol 2018; 117:45-55. [DOI: 10.1016/j.enzmictec.2018.05.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/27/2018] [Accepted: 05/21/2018] [Indexed: 01/08/2023]
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Bispecific chimeric antigen receptors targeting the CD4 binding site and high-mannose Glycans of gp120 optimized for anti-human immunodeficiency virus potency and breadth with minimal immunogenicity. Cytotherapy 2018; 20:407-419. [PMID: 29306566 DOI: 10.1016/j.jcyt.2017.11.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 10/16/2017] [Accepted: 11/07/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND AIMS Chimeric antigen receptors (CARs) offer great potential toward a functional cure of human immunodeficiency virus (HIV) infection. To achieve the necessary long-term virus suppression, we believe that CARs must be designed for optimal potency and anti-HIV specificity, and also for minimal probability of virus escape and CAR immunogenicity. CARs containing antibody-based motifs are problematic in the latter regard due to epitope mutation and anti-idiotypic immune responses against the variable regions. METHODS We designed bispecific CARs, each containing a segment of human CD4 linked to the carbohydrate recognition domain of a human C-type lectin. These CARs target two independent regions on HIV-1 gp120 that presumably must be conserved on clinically significant virus variants (i.e., the primary receptor binding site and the dense oligomannose patch). Functionality and specificity of these bispecific CARs were analyzed in assays of CAR-T cell activation and spreading HIV-1 suppression. RESULTS T cells expressing a CD4-dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DCSIGN) CAR displayed robust stimulation upon encounter with Env-expressing targets, but negligible activity against intercellular adhesion molecule (ICAM)-2 and ICAM-3, the natural dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin ligands. Moreover, the presence of the lectin moiety prevented the CD4 from acting as an entry receptor on CCR5-expressing cells, including CD8+ T cells. However, in HIV suppression assays, the CD4-DCSIGN CAR and the related CD4-liver/lymph node-specific intercellular adhesion molecule-3-grabbing non-integrin CAR displayed only minimally increased potency compared with the CD4 CAR against some HIV-1 isolates and reduced potency against others. By contrast, the CD4-langerin and CD4-mannose binding lectin (MBL) CARs uniformly displayed enhanced potency compared with the CD4 CAR against all the genetically diverse HIV-1 isolates examined. Further experimental data, coupled with known biological features, suggest particular advantages of the CD4-MBL CAR. DISCUSSION These studies highlight features of bispecific CD4-lectin CARs that achieve potency enhancement by targeting two distinct highly conserved Env determinants while lacking immunogenicity-prone antibody-based motifs.
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25
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Sprokholt JK, Heineke MH, Kaptein TM, van Hamme JL, Geijtenbeek TBH. DCs facilitate B cell responses against microbial DNA via DC-SIGN. PLoS One 2017; 12:e0185580. [PMID: 28976999 PMCID: PMC5627929 DOI: 10.1371/journal.pone.0185580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 09/15/2017] [Indexed: 11/18/2022] Open
Abstract
Microbial DNA is highly immunostimulatory and is sensed by endosomal pattern recognition receptors after release from internalized microbes. It is unclear how extracellular DNA released from dead microbes is delivered to endosomal PRRs to induce immune responses. Here we have investigated the ability of DCs to bind and internalize extracellular E.coli DNA as well as synthetic DNA. DCs internalized E.coli and synthetic DNA, which was dependent on the C-type lectin receptor DC-SIGN. Notably, endosomal uptake of DNA by DCs enhanced TLR9-dependent responses of B cells against DNA. Hence, we have identified DC-SIGN as a cell surface receptor for DNA that facilitates immune responses directed against DNA.
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Affiliation(s)
- Joris K. Sprokholt
- Department of Experimental Immunology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Infection & Immunity Institute, Amsterdam, the Netherlands
| | - Marieke H. Heineke
- Department of Experimental Immunology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Infection & Immunity Institute, Amsterdam, the Netherlands
| | - Tanja M. Kaptein
- Department of Experimental Immunology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Infection & Immunity Institute, Amsterdam, the Netherlands
| | - John L. van Hamme
- Department of Experimental Immunology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Infection & Immunity Institute, Amsterdam, the Netherlands
| | - Teunis B. H. Geijtenbeek
- Department of Experimental Immunology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Amsterdam Infection & Immunity Institute, Amsterdam, the Netherlands
- * E-mail:
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26
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Pednekar L, Pandit H, Paudyal B, Kaur A, Al-Mozaini MA, Kouser L, Ghebrehiwet B, Mitchell DA, Madan T, Kishore U. Complement Protein C1q Interacts with DC-SIGN via Its Globular Domain and Thus May Interfere with HIV-1 Transmission. Front Immunol 2016; 7:600. [PMID: 28066413 PMCID: PMC5177617 DOI: 10.3389/fimmu.2016.00600] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Accepted: 11/30/2016] [Indexed: 12/11/2022] Open
Abstract
Dendritic cells (DCs) are the most potent antigen-presenting cells capable of priming naïve T-cells. Its C-type lectin receptor, DC-SIGN, regulates a wide range of immune functions. Along with its role in HIV-1 pathogenesis through complement opsonization of the virus, DC-SIGN has recently emerged as an adaptor for complement protein C1q on the surface of immature DCs via a trimeric complex involving gC1qR, a receptor for the globular domain of C1q. Here, we have examined the nature of interaction between C1q and DC-SIGN in terms of domain localization, and implications of C1q–DC-SIGN-gC1qR complex formation on HIV-1 transmission. We first expressed and purified recombinant extracellular domains of DC-SIGN and its homologue DC-SIGNR as tetramers comprising of the entire extra cellular domain including the α-helical neck region and monomers comprising of the carbohydrate recognition domain only. Direct binding studies revealed that both DC-SIGN and DC-SIGNR were able to bind independently to the recombinant globular head modules ghA, ghB, and ghC, with ghB being the preferential binder. C1q appeared to interact with DC-SIGN or DC-SIGNR in a manner similar to IgG. Mutational analysis using single amino acid substitutions within the globular head modules showed that TyrB175 and LysB136 were critical for the C1q–DC-SIGN/DC-SIGNR interaction. Competitive studies revealed that gC1qR and ghB shared overlapping binding sites on DC-SIGN, implying that HIV-1 transmission by DCs could be modulated due to the interplay of gC1qR-C1q with DC-SIGN. Since C1q, gC1qR, and DC-SIGN can individually bind HIV-1, we examined how C1q and gC1qR modulated HIV-1–DC-SIGN interaction in an infection assay. Here, we report, for the first time, that C1q suppressed DC-SIGN-mediated transfer of HIV-1 to activated pooled peripheral blood mononuclear cells, although the globular head modules did not. The protective effect of C1q was negated by the addition of gC1qR. In fact, gC1qR enhanced DC-SIGN-mediated HIV-1 transfer, suggesting its role in HIV-1 pathogenesis. Our results highlight the consequences of multiple innate immune pattern recognition molecules forming a complex that can modify their functions in a way, which may be advantageous for the pathogen.
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Affiliation(s)
- Lina Pednekar
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
| | - Hrishikesh Pandit
- Department of Innate Immunity, National Institute for Research in Reproductive Health (ICMR) , Mumbai , India
| | - Basudev Paudyal
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
| | - Anuvinder Kaur
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
| | - Maha Ahmed Al-Mozaini
- Department of Infection and Immunity, King Faisal Specialist Hospital and Research Centre , Riyadh , Saudi Arabia
| | - Lubna Kouser
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
| | - Berhane Ghebrehiwet
- Department of Medicine, State University of New York , Stony Brook, NY , USA
| | - Daniel A Mitchell
- Clinical Sciences Research Laboratories, University of Warwick , Coventry , UK
| | - Taruna Madan
- Department of Innate Immunity, National Institute for Research in Reproductive Health (ICMR) , Mumbai , India
| | - Uday Kishore
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
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27
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Park KT, ElNaggar MM, Abdellrazeq GS, Bannantine JP, Mack V, Fry LM, Davis WC. Phenotype and Function of CD209+ Bovine Blood Dendritic Cells, Monocyte-Derived-Dendritic Cells and Monocyte-Derived Macrophages. PLoS One 2016; 11:e0165247. [PMID: 27764236 PMCID: PMC5072659 DOI: 10.1371/journal.pone.0165247] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 10/07/2016] [Indexed: 11/18/2022] Open
Abstract
Phylogenic comparisons of the mononuclear phagocyte system (MPS) of humans and mice demonstrate phenotypic divergence of dendritic cell (DC) subsets that play similar roles in innate and adaptive immunity. Although differing in phenotype, DC can be classified into four groups according to ontogeny and function: conventional DC (cDC1 and cDC2), plasmacytoid DC (pDC), and monocyte derived DC (MoDC). DC of Artiodactyla (pigs and ruminants) can also be sub-classified using this system, allowing direct functional and phenotypic comparison of MoDC and other DC subsets trafficking in blood (bDC). Because of the high volume of blood collections required to study DC, cattle offer the best opportunity to further our understanding of bDC and MoDC function in an outbred large animal species. As reported here, phenotyping DC using a monoclonal antibody (mAb) to CD209 revealed CD209 is expressed on the major myeloid population of DC present in blood and MoDC, providing a phenotypic link between these two subsets. Additionally, the present study demonstrates that CD209 is also expressed on monocyte derived macrophages (MoΦ). Functional analysis revealed each of these populations can take up and process antigens (Ags), present them to CD4 and CD8 T cells, and elicit a T-cell recall response. Thus, bDC, MoDC, and MoΦ pulsed with pathogens or candidate vaccine antigens can be used to study factors that modulate DC-driven T-cell priming and differentiation ex vivo.
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Affiliation(s)
- Kun Taek Park
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, United States of America
- Department of Veterinary Microbiology, College of Veterinary Medicine, Seoul National University, Seoul 151–742, Republic of Korea
| | - Mahmoud M. ElNaggar
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, United States of America
- Department of Microbiology, Faculty of Veterinary Medicine, Alexandria University, Egypt
| | - Gaber S. Abdellrazeq
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, United States of America
- Department of Microbiology, Faculty of Veterinary Medicine, Alexandria University, Egypt
| | - John P. Bannantine
- USDA, ARS, National Animal Disease Center, Ames, Iowa, United States of America
| | - Victoria Mack
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, United States of America
| | - Lindsay M. Fry
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, United States of America
- USDA, ARS, Animal Disease Research Unit, Pullman, WA 99164, United States of America
| | - William C. Davis
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, United States of America
- * E-mail:
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28
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Tytgat HLP, van Teijlingen NH, Sullan RMA, Douillard FP, Rasinkangas P, Messing M, Reunanen J, Satokari R, Vanderleyden J, Dufrêne YF, Geijtenbeek TBH, de Vos WM, Lebeer S. Probiotic Gut Microbiota Isolate Interacts with Dendritic Cells via Glycosylated Heterotrimeric Pili. PLoS One 2016; 11:e0151824. [PMID: 26985831 PMCID: PMC4795749 DOI: 10.1371/journal.pone.0151824] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 03/06/2016] [Indexed: 02/06/2023] Open
Abstract
Mapping of the microbial molecules underlying microbiota-host interactions is key to understand how microbiota preserve mucosal homeostasis. A pivotal family of such bacterial molecules are pili. Pili are proteinaceous cell wall appendages with a well-documented role in adhesion, whilst their role in immune interaction with the host is less established. Gram-positive pili are often posttranslationally modified by sortase-specific cleavage reactions and the formation of intramolecular peptide bonds. Here we report glycosylation as a new level of posttranslational modification of sortase-dependent pili of a beneficial microbiota species and its role in immune modulation. We focused on the SpaCBA pili of the model probiotic and beneficial human gut microbiota isolate Lactobacillus rhamnosus GG. A unique combination of molecular techniques, nanoscale mechanical and immunological approaches led to the identification of mannose and fucose residues on the SpaCBA pili. These glycans on the pili are recognized by human dendritic cells via the C-type lectin receptor DC-SIGN, a key carbohydrate-dependent immune tailoring pattern recognition receptor. This specific lectin-sugar interaction is moreover of functional importance and modulated the cytokine response of dendritic cells. This provides insight into the direct role bacterial glycoproteins can play in the immunomodulation of the host. Modification of the complex heterotrimeric pili of a model probiotic and microbiota isolate with mannose and fucose is of importance for the functional interaction with the host immune lectin receptor DC-SIGN on human dendritic cells. Our findings shed light on the yet underappreciated role of glycoconjugates in bacteria-host interactions.
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Affiliation(s)
- Hanne L. P. Tytgat
- Centre of Microbial and Plant Genetics, KU Leuven, Leuven, Belgium
- Department of Bioscience Engineering, Environmental Ecology & Applied Microbiology, University of Antwerp, Antwerp, Belgium
- Laboratory of Microbiology, Wageningen University, Wageningen, The Netherlands
| | - Nienke H. van Teijlingen
- Academic Medical Center, Department of Experimental Immunology, University of Amsterdam, Amsterdam, The Netherlands
| | - Ruby May A. Sullan
- Institute of Life Sciences, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | | | - Pia Rasinkangas
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
| | - Marcel Messing
- Immunobiology Research Program and Department of Bacteriology and Immunology, University of Helsinki, Helsinki, Finland
| | - Justus Reunanen
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
| | - Reetta Satokari
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
| | - Jos Vanderleyden
- Centre of Microbial and Plant Genetics, KU Leuven, Leuven, Belgium
| | - Yves F. Dufrêne
- Laboratory of Microbiology, Wageningen University, Wageningen, The Netherlands
| | - Teunis B. H. Geijtenbeek
- Academic Medical Center, Department of Experimental Immunology, University of Amsterdam, Amsterdam, The Netherlands
| | - Willem M. de Vos
- Laboratory of Microbiology, Wageningen University, Wageningen, The Netherlands
- Department of Veterinary Biosciences, University of Helsinki, Helsinki, Finland
- Immunobiology Research Program and Department of Bacteriology and Immunology, University of Helsinki, Helsinki, Finland
| | - Sarah Lebeer
- Centre of Microbial and Plant Genetics, KU Leuven, Leuven, Belgium
- Department of Bioscience Engineering, Environmental Ecology & Applied Microbiology, University of Antwerp, Antwerp, Belgium
- * E-mail:
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29
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Peters M, Guidato PM, Peters K, Megger DA, Sitek B, Classen B, Heise EM, Bufe A. Allergy-Protective Arabinogalactan Modulates Human Dendritic Cells via C-Type Lectins and Inhibition of NF-κB. THE JOURNAL OF IMMUNOLOGY 2016; 196:1626-35. [PMID: 26746190 DOI: 10.4049/jimmunol.1502178] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 12/08/2015] [Indexed: 01/07/2023]
Abstract
Arabinogalactan (AG) isolated from dust of a traditional farm prevents disease in murine models of allergy. However, it is unclear whether this polysaccharide has immune regulatory properties in humans. The aim of this study was to test the influence of AG on the immune-stimulating properties of human dendritic cells (DCs). Moreover, we sought to identify the receptor to which AG binds. AG was produced from plant callus tissue under sterile conditions to avoid the influence of pathogen-associated molecular patterns in subsequent experiments. The influence of AG on the human immune system was investigated by analyzing its impact on monocyte-derived DCs. To analyze whether the T cell stimulatory capacity of AG-stimulated DCs is altered, an MLR with naive Th cells was performed. We revealed that AG reduced T cell proliferation in a human MLR. In the search for a molecular mechanism, we found that AG binds to the immune modulatory receptors DC-specific ICAM-3 -: grabbing non integrin (DC-SIGN) and macrophage mannose receptor 1 (MMR-1). Stimulation of these receptors with AG simultaneously with TLR4 stimulation with LPS increased the expression of the E3 ubiquitin-protein ligase tripartite motif -: containing protein 21 and decreased the phosphorylation of NF-κB p65 in DCs. This led to a reduced activation profile with reduced costimulatory molecules and proinflammatory cytokine production. Blocking of MMR-1 or DC-SIGN with neutralizing Abs partially inhibits this effect. We conclude that AG dampens the activation of human DCs by LPS via binding to DC-SIGN and MMR-1, leading to attenuated TLR signaling. This results in a reduced T cell activation capacity of DCs.
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Affiliation(s)
- Marcus Peters
- Department of Experimental Pneumology, Ruhr University Bochum, 44801 Bochum, Germany;
| | - Patrick M Guidato
- Department of Experimental Pneumology, Ruhr University Bochum, 44801 Bochum, Germany
| | - Karin Peters
- Department of Experimental Pneumology, Ruhr University Bochum, 44801 Bochum, Germany
| | - Dominik A Megger
- Medical Proteome Center, Ruhr University Bochum, 44801 Bochum, Germany; and
| | - Barbara Sitek
- Medical Proteome Center, Ruhr University Bochum, 44801 Bochum, Germany; and
| | - Birgit Classen
- Department of Pharmaceutical Biology, Christian Albrechts University, 24118 Kiel, Germany
| | - Esther M Heise
- Department of Pharmaceutical Biology, Christian Albrechts University, 24118 Kiel, Germany
| | - Albrecht Bufe
- Department of Experimental Pneumology, Ruhr University Bochum, 44801 Bochum, Germany
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Nabatov AA, Raginov IS. The DC-SIGN-CD56 interaction inhibits the anti-dendritic cell cytotoxicity of CD56 expressing cells. Infect Agent Cancer 2015; 10:49. [PMID: 26692894 PMCID: PMC4676137 DOI: 10.1186/s13027-015-0043-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 11/18/2015] [Indexed: 12/20/2022] Open
Abstract
Background This study aimed to clarify interactions of the pattern-recognition receptor DC-SIGN with cells from the HIV-infected peripheral blood lymphocyte cultures. Methods Cells from control and HIV-infected peripheral blood lymphocyte cultures were tested for the surface expression of DC-SIGN ligands. The DC-SIGN ligand expressing cells were analyzed for the role of DC-SIGN-ligand interaction in their functionality. Results In the vast majority of experiments HIV-infected lymphocytes did not express detectable DC-SIGN ligands on their cell surfaces. In contrast, non-infected cells, carrying NK-specific marker CD56, expressed cell surface DC-SIGN ligands. The weakly polysialylated CD56 was identified as a novel DC-SIGN ligand. The treatment of DC-SIGN expressing dendritic cells with anti-DC-SIGN antibodies increased the anti-dendritic cell cytotoxicity of CD56pos cells. The treatment of CD56pos cells with a peptide, blocking the weakly polysialylated CD56-specifc trans-homophilic interactions, inhibited their anti-dendritic cells cytotoxicity. Conclusions The interaction between DC-SIGN and CD56 inhibits homotypic intercellular interactions of CD56pos cells and protects DC-SIGN expressing dendritic cells against CD56pos cell-mediated cytotoxicity. This finding can have an impact on the development of approaches to HIV infection and cancer therapy as well as in transplantation medicine.
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Affiliation(s)
- Alexey A Nabatov
- Science Center, Volga Region State Academy of Physical Culture, Sport and Tourism, 33, Universiade Village, Kazan, 420138 Russia ; Department of Molecular Cell Biology & Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Ivan S Raginov
- Republican Clinical Hospital, 138 Orenburgsky tract, Kazan, 420064 RUSSIA ; Scientific and Educational Center of Pharmaceutics, 18 Kremlyovskaya ul., Kazan, 423000 RUSSIA
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31
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Andreasen A, Skovgaard K, Klaver EJ, van Die I, Mejer H, Thamsborg SM, Kringel H. Comparison of innate and Th1-type host immune responses inOesophagostomum dentatumandTrichuris suisinfections in pigs. Parasite Immunol 2015; 38:53-63. [DOI: 10.1111/pim.12296] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 11/13/2015] [Indexed: 12/28/2022]
Affiliation(s)
- A. Andreasen
- Parasitology and Aquatic Diseases; Department of Veterinary Disease Biology; Faculty of Health and Medical Sciences; University of Copenhagen; Frederiksberg C Denmark
| | - K. Skovgaard
- Innate Immunology Group; National Veterinary Institute; Technical University of Denmark; Frederiksberg C Denmark
| | - E. J. Klaver
- Department of Molecular Cell Biology and Immunology; VU University Medical Center; Amsterdam the Netherlands
| | - I. van Die
- Department of Molecular Cell Biology and Immunology; VU University Medical Center; Amsterdam the Netherlands
| | - H. Mejer
- Parasitology and Aquatic Diseases; Department of Veterinary Disease Biology; Faculty of Health and Medical Sciences; University of Copenhagen; Frederiksberg C Denmark
| | - S. M. Thamsborg
- Parasitology and Aquatic Diseases; Department of Veterinary Disease Biology; Faculty of Health and Medical Sciences; University of Copenhagen; Frederiksberg C Denmark
| | - H. Kringel
- Parasitology and Aquatic Diseases; Department of Veterinary Disease Biology; Faculty of Health and Medical Sciences; University of Copenhagen; Frederiksberg C Denmark
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32
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Chaaithanya IK, Muruganandam N, Surya P, Anwesh M, Alagarasu K, Vijayachari P. Association of Oligoadenylate Synthetase Gene Cluster and DC-SIGN (CD209) Gene Polymorphisms with Clinical Symptoms in Chikungunya Virus Infection. DNA Cell Biol 2015; 35:44-50. [PMID: 26398832 DOI: 10.1089/dna.2015.2819] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Biology and pathogenesis of chikungunya virus (CHIKV) are not clearly established. Host factors play an important role in determining the progression and severity of the disease. Polymorphisms in the promoter region of CD209 gene (rs735239, rs4804803, rs2287886) and OAS1 (rs1131454 and rs10774671), OAS2 (rs15895 and rs1732778), and OAS3 (rs2285932 and rs2072136) genes were investigated in 100 patients with CHIKV infection and 101 healthy controls to find out the association of these polymorphisms with CHIKV infection. To evaluate the association of OAS and CD209 gene polymorphisms with the presence or absence of disease symptoms in CHIKV-infected patients. DNA was extracted and typed using polymerase chain reaction followed by restriction fragment length polymorphism methods. Results revealed that the allele and genotype frequencies of OAS1, OAS3, and OAS2 gene polymorphisms were not different between healthy controls and CHIKV patients. The frequency of CD209 gene G/G genotype of rs4804803 was significantly higher in CHIKV patients compared to healthy controls (p = 0.046). The present study suggests that rs4804803 GG genotype of CD209 gene is associated with susceptibility to CHIKV infection. To conclude, the present preliminary study suggests that OAS gene cluster and CD209 gene polymorphisms influence the risk of developing clinical symptoms in CHIKV-infected patients. Further follow-up studies with a large number of samples are needed to assess the role of these genes in association with post-sequela symptoms observed in CHIKV patients. A detailed research is required in these directions to understand the biology behind CHIKV infection and disease severity.
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Affiliation(s)
- Itta Krishna Chaaithanya
- 1 Regional Medical Research Centre (ICMR) , Port Blair, Andaman and Nicobar Islands, India .,2 Regional Medical Research Centre (ICMR) , Nehru Nagar, Belgaum, Karnataka, India
| | - Nagarajan Muruganandam
- 1 Regional Medical Research Centre (ICMR) , Port Blair, Andaman and Nicobar Islands, India
| | - Palani Surya
- 1 Regional Medical Research Centre (ICMR) , Port Blair, Andaman and Nicobar Islands, India
| | - Maile Anwesh
- 1 Regional Medical Research Centre (ICMR) , Port Blair, Andaman and Nicobar Islands, India
| | - Kalichamy Alagarasu
- 3 Dengue/Chikungunya Group, National Institute of Virology , Pune, Maharashtra, India
| | - Paluru Vijayachari
- 1 Regional Medical Research Centre (ICMR) , Port Blair, Andaman and Nicobar Islands, India
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33
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Chaudhary O, Kumar S, Bala M, Singh J, Hazarika A, Luthra K. Association of DC-SIGNR Expression in Peripheral Blood Mononuclear Cells with DC-SIGNR Genotypes in HIV-1 Infection. Viral Immunol 2015; 28:472-5. [PMID: 26313015 DOI: 10.1089/vim.2014.0148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Dendritic cell-specific intracellular adhesion molecule 3 grabbing nonintegrin related molecule (DC-SIGNR) is a C-type lectin, calcium-dependent carbohydrate-binding protein, which can act as a cell-adhesion and pathogen recognition receptor. DC-SIGNR is known to be highly expressed on liver sinusoidal cells and in the lymph nodes. However, its expression in peripheral blood mononuclear cells (PBMCs) in HIV-1 infection has not been addressed. Therefore, this study determined the expression of DC-SIGNR in PBMCs of HIV-1-infected patients and healthy seronegative individuals by real-time polymerase chain reaction and assessed its correlation with CD4+ T cell counts and DC-SIGNR genotypes. A significantly higher expression of DC-SIGNR was observed in the PBMCs of HIV-1-infected patients compared with healthy seronegative individuals. Further, there was a negative correlation between DC-SIGNR expression and CD4+ T cell counts and positive with viral load, with higher DC-SIGNR expression in the PBMCs of HIV-1-infected patients with a CD4+ T cell count <200 cells/μL than those with >200 cells/μL. This is the first study to report the expression of DC-SIGNR in PBMCs of HIV-1-infected patients. A salient finding of this study is that the DC-SIGNR expression was higher in HIV-1-infected patients, and its positive correlation with viral load and negative with CD4+ T cells counts suggesting a potential role of DC-SIGNR in HIV-1 infection.
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Affiliation(s)
- Omkar Chaudhary
- 1 Department of Biochemistry, Cardiothoracic and Neurosciences Center, All India Institute of Medical Sciences , New Delhi, India
| | - Sanjeev Kumar
- 1 Department of Biochemistry, Cardiothoracic and Neurosciences Center, All India Institute of Medical Sciences , New Delhi, India
| | - Manju Bala
- 2 Regional STD Teaching Training and Research Centre, Safdarjung Hospital , New Delhi, India
| | - Jasbir Singh
- 3 Department of Biochemistry, Kurukshetra University , Kurukshetra, India
| | - Anjali Hazarika
- 4 Blood Transfusion Services, Cardiothoracic and Neurosciences Center, All India Institute of Medical Sciences , New Delhi, India
| | - Kalpana Luthra
- 1 Department of Biochemistry, Cardiothoracic and Neurosciences Center, All India Institute of Medical Sciences , New Delhi, India
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van den Berg LM, Cardinaud S, van der Aar AMG, Sprokholt JK, de Jong MAWP, Zijlstra-Willems EM, Moris A, Geijtenbeek TBH. Langerhans Cell-Dendritic Cell Cross-Talk via Langerin and Hyaluronic Acid Mediates Antigen Transfer and Cross-Presentation of HIV-1. THE JOURNAL OF IMMUNOLOGY 2015; 195:1763-73. [PMID: 26170391 DOI: 10.4049/jimmunol.1402356] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 06/16/2015] [Indexed: 12/21/2022]
Abstract
Human epidermal and mucosal Langerhans cells (LCs) express the C-type lectin receptor langerin that functions as a pattern recognition receptor. LCs are among the first immune cells to interact with HIV-1 during sexual transmission. In this study, we demonstrate that langerin not only functions as a pattern recognition receptor but also as an adhesion receptor mediating clustering between LCs and dendritic cells (DCs). Langerin recognized hyaluronic acid on DCs and removal of these carbohydrate structures partially abrogated LC-DC clustering. Because LCs did not cross-present HIV-1-derived Ags to CD8(+) T cells in a cross-presentation model, we investigated whether LCs were able to transfer Ags to DCs. LC-DC clustering led to maturation of DCs and facilitated Ag transfer of HIV-1 to DCs, which subsequently induced activation of CD8(+) cells. The rapid transfer of Ags to DCs, in contrast to productive infection of LCs, suggests that this might be an important mechanism for induction of anti-HIV-1 CD8(+) T cells. Induction of the enzyme hyaluronidase-2 by DC maturation allowed degradation of hyaluronic acid and abrogated LC-DC interactions. Thus, we have identified an important function of langerin in mediating LC-DC clustering, which allows Ag transfer to induce CTL responses to HIV-1. Furthermore, we showed this interaction is mediated by hyaluronidase-2 upregulation after DC maturation. These data underscore the importance of LCs and DCs in orchestrating adaptive immunity to HIV-1. Novel strategies might be developed to harness this mechanism for vaccination.
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Affiliation(s)
- Linda M van den Berg
- Department of Experimental Immunology, Academic Medical Center, 1105 AZ Amsterdam, the Netherlands
| | - Sylvain Cardinaud
- Center for Immunology and Microbial Infections-Paris, University Pierre and Marie Curie Paris 06, University Sorbonne, F-75013 Paris, France; Center for Immunology and Microbial Infections-Paris, INSERM, U1135, F-75013 Paris, France; Center for Immunology and Microbial Infections-Paris, French National Centre for Scientific Research, ERL 8255, F-75013 Paris, France
| | - Angelic M G van der Aar
- Department of Experimental Immunology, Academic Medical Center, 1105 AZ Amsterdam, the Netherlands
| | - Joris K Sprokholt
- Department of Experimental Immunology, Academic Medical Center, 1105 AZ Amsterdam, the Netherlands
| | - Marein A W P de Jong
- Department of Experimental Immunology, Academic Medical Center, 1105 AZ Amsterdam, the Netherlands
| | | | - Arnaud Moris
- Center for Immunology and Microbial Infections-Paris, University Pierre and Marie Curie Paris 06, University Sorbonne, F-75013 Paris, France; Center for Immunology and Microbial Infections-Paris, INSERM, U1135, F-75013 Paris, France; Center for Immunology and Microbial Infections-Paris, French National Centre for Scientific Research, ERL 8255, F-75013 Paris, France; Department of Immunology, AP-HP University Medical Center Paris Area, F-75013 Paris, France
| | - Teunis B H Geijtenbeek
- Department of Experimental Immunology, Academic Medical Center, 1105 AZ Amsterdam, the Netherlands;
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35
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Boks MA, Ambrosini M, Bruijns SC, Kalay H, van Bloois L, Storm G, Garcia-Vallejo JJ, van Kooyk Y. MPLA incorporation into DC-targeting glycoliposomes favours anti-tumour T cell responses. J Control Release 2015; 216:37-46. [PMID: 26151293 DOI: 10.1016/j.jconrel.2015.06.033] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 06/23/2015] [Accepted: 06/23/2015] [Indexed: 02/04/2023]
Abstract
Dendritic cells (DC) are attractive targets for cancer immunotherapy as they initiate strong and long-lived tumour-specific T cell responses. DC can be effectively targeted in vivo with tumour antigens by using nanocarriers such as liposomes. Cross-presentation of tumour antigens is enhanced with strong adjuvants such as TLR ligands. However, often these adjuvants have off-target effects, and would benefit from a DC-specific targeting strategy, similar to the tumour antigen. The goal of this study was to develop a strategy for specifically targeting DC with tumour antigen and adjuvant by using glycoliposomes. We have generated liposomes containing the glycan Lewis(Le)(X) which is highly specific for the C-type lectin receptor DC-SIGN expressed by DC. Le(X)-modified liposomes were taken up by human monocyte-derived DC in a DC-SIGN-specific manner. As adjuvants we incorporated the TLR ligands Pam3CySK4, Poly I:C, MPLA and R848 into liposomes and compared their adjuvant capacity on DC. Incorporation of the TLR4 ligand MPLA into glycoliposomes induced DC maturation and production of pro-inflammatory cytokines, in a DC-SIGN-specific manner, and DC activation was comparable to administration of soluble MPLA. Incorporation of MPLA into glycoliposomes significantly enhanced antigen cross-presentation of the melanoma tumour antigen gp100280-288 peptide to CD8(+) T cells compared to non-glycosylated MPLA liposomes. Importantly, antigen cross-presentation of the gp100280-288 peptide was significantly higher using MPLA glycoliposomes compared to the co-administration of soluble MPLA with glycoliposomes. Taken together, our data demonstrates that specific targeting of a gp100 tumour antigen and the adjuvant MPLA to DC-SIGN-expressing DC enhances the uptake of peptide-containing liposomes, the activation of DC, and induces tumour antigen-specific CD8(+) T cell responses. These data demonstrate that adjuvant-containing glycoliposome-based vaccines targeting DC-SIGN(+) DC represent a powerful new approach for CD8(+) T cell activation.
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Affiliation(s)
- Martine A Boks
- Department of Molecular Cell Biology and Immunology, VU University Medical Center (VUmc), Amsterdam, The Netherlands
| | - Martino Ambrosini
- Department of Molecular Cell Biology and Immunology, VU University Medical Center (VUmc), Amsterdam, The Netherlands
| | - Sven C Bruijns
- Department of Molecular Cell Biology and Immunology, VU University Medical Center (VUmc), Amsterdam, The Netherlands
| | - Hakan Kalay
- Department of Molecular Cell Biology and Immunology, VU University Medical Center (VUmc), Amsterdam, The Netherlands
| | - Louis van Bloois
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, The Netherlands
| | - Gert Storm
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, The Netherlands; MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, The Netherlands
| | - Juan J Garcia-Vallejo
- Department of Molecular Cell Biology and Immunology, VU University Medical Center (VUmc), Amsterdam, The Netherlands
| | - Yvette van Kooyk
- Department of Molecular Cell Biology and Immunology, VU University Medical Center (VUmc), Amsterdam, The Netherlands.
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36
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Wheat WH, Dhouib R, Angala SK, Larrouy-Maumus G, Dobos K, Nigou J, Spencer JS, Jackson M. The presence of a galactosamine substituent on the arabinogalactan of Mycobacterium tuberculosis abrogates full maturation of human peripheral blood monocyte-derived dendritic cells and increases secretion of IL-10. Tuberculosis (Edinb) 2015; 95:476-89. [PMID: 26048627 DOI: 10.1016/j.tube.2015.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 04/08/2015] [Indexed: 12/28/2022]
Abstract
Slow-growing and pathogenic Mycobacterium spp. are characterized by the presence of galactosamine (GalN) that modifies the interior branched arabinosyl residues of the arabinogalactan (AG) that is a major heteropolysaccharide cell wall component. The availability of null mutants of the polyprenyl-phospho-N-acetylgalactosaminyl synthase (Rv3631, PpgS) and the (N-acetyl-) galactosaminyl transferase (Rv3779) of Mycobacterium tuberculosis (Mtb) has provided a means to elucidate the role of the GalN substituent of AG in terms of host-pathogen interactions. Comparisons of treating human peripheral blood monocyte-derived dendritic cells (hPMC-DCs) with wild-type, Rv3631 and Rv3779 mutant strains of Mtb revealed increased expression of DC maturation markers, decreased affinity for a soluble DC-SIGN probe, reduced IL-10 secretion and increased TLR-2-mediated NF-κB activation among GalN-deficient Mtb strains compared to GalN-producing strains. Analysis of surface expression of a panel of defined or putative DC-SIGN ligands on both WT strains or either Rv3631 or Rv3779 mutant did not show significant differences suggesting that the role of the GalN substituent of AG may be to modulate access of the bacilli to immunologically-relevant receptor domains on DCs or contribute to higher ordered pathogen associated molecular pattern (PAMP)/pattern recognition receptor (PRR) interactions rather than the GalN-AG components having a direct immunological effect per se.
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Affiliation(s)
- William H Wheat
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523-1682, USA.
| | - Rabeb Dhouib
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523-1682, USA
| | - Shiva K Angala
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523-1682, USA
| | - Gérald Larrouy-Maumus
- CNRS, IPBS (Institut de Pharmacologie et de Biologie Structurale), Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 route de Narbonne, F-31077 Toulouse, France; Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France
| | - Karen Dobos
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523-1682, USA
| | - Jérôme Nigou
- CNRS, IPBS (Institut de Pharmacologie et de Biologie Structurale), Département Mécanismes Moléculaires des Infections Mycobactériennes, 205 route de Narbonne, F-31077 Toulouse, France; Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France
| | - John S Spencer
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523-1682, USA
| | - Mary Jackson
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523-1682, USA
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Schistosoma mansoni Soluble Egg Antigens Induce Expression of the Negative Regulators SOCS1 and SHP1 in Human Dendritic Cells via Interaction with the Mannose Receptor. PLoS One 2015; 10:e0124089. [PMID: 25897665 PMCID: PMC4405200 DOI: 10.1371/journal.pone.0124089] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 02/25/2015] [Indexed: 12/31/2022] Open
Abstract
Schistosomiasis is a common debilitating human parasitic disease in (sub)tropical areas, however, schistosome infections can also protect against a variety of inflammatory diseases. This has raised broad interest in the mechanisms by which Schistosoma modulate the immune system into an anti-inflammatory and regulatory state. Human dendritic cells (DCs) show many phenotypic changes upon contact with Schistosoma mansoni soluble egg antigens (SEA). We here show that oxidation of SEA glycans, but not heat-denaturation, abrogates the capacity of SEA to suppress both LPS-induced cytokine secretion and DC proliferation, indicating an important role of SEA glycans in these processes. Remarkably, interaction of SEA glycans with DCs results in a strongly increased expression of Suppressor Of Cytokine Signalling1 (SOCS1) and SH2-containing protein tyrosine Phosphatase-1 (SHP1), important negative regulators of TLR4 signalling. In addition, SEA induces the secretion of transforming growth factor β (TGF-β), and the surface expression of the costimulatory molecules Programmed Death Ligand-1 (PD-L1) and OX40 ligand (OX40L), which are known phenotypic markers for the capacity of DCs to polarize naïve T cells into Th2/Treg cell subsets. Inhibition of mannose receptor (MR)-mediated internalization of SEA into DCs by blocking with allyl α-D-mannoside or anti-MR antibodies, significantly reduced SOCS1 and SHP1 expression. In conclusion, we demonstrate that SEA glycans are essential for induction of enhanced SOCS1 and SHP1 levels in DCs via the MR. Our data provide novel mechanistic evidence for the potential of S. mansoni SEA glycans to modulate human DCs, which may contribute to the capacity of SEA to down-regulate inflammatory responses.
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38
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Fehres CM, Kalay H, Bruijns SCM, Musaafir SAM, Ambrosini M, van Bloois L, van Vliet SJ, Storm G, Garcia-Vallejo JJ, van Kooyk Y. Cross-presentation through langerin and DC-SIGN targeting requires different formulations of glycan-modified antigens. J Control Release 2015; 203:67-76. [PMID: 25656175 DOI: 10.1016/j.jconrel.2015.01.040] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 01/29/2015] [Accepted: 01/30/2015] [Indexed: 11/17/2022]
Abstract
Dendritic cells (DCs) and Langerhans cells (LC) are professional antigen presenting cells (APCs) that initiate humoral and cellular immune responses. Targeted delivery of antigen towards DC- or LC-specific receptors enhances vaccine efficacy. In this study, we compared the efficiency of glycan-based antigen targeting to both the human DC-specific C-type lectin receptor (CLR) DC-SIGN and the LC-specific CLR langerin. Since DC-SIGN and langerin are able to recognize the difucosylated oligosaccharide Lewis Y (Le(Y)), we prepared neoglycoconjugates bearing this glycan epitope to allow targeting of both lectins. Le(Y)-modified liposomes, with an approximate diameter of 200nm, were significantly endocytosed by DC-SIGN(+) DCs and mediated efficient antigen presentation to CD4(+) and CD8(+) T cells. Surprisingly, although langerin bound to Le(Y)-modified liposomes, LCs exposed to Le(Y)-modified liposomes could not endocytose liposomes nor mediate antigen presentation to T cells. However, LCs mediated an enhanced cross-presentation when antigen was delivered through langerin using Le(Y)-modified synthetic long peptides. In contrast, Le(Y)-modified synthetic long peptides were recognized by DC-SIGN, but did not trigger antigen internalization nor antigen cross-presentation. These data demonstrate that langerin and DC-SIGN have different size requirements for antigen uptake. Although using glycans remains an interesting option in the design of anti-cancer vaccines targeting multiple CLRs, aspects such as molecule size and conformation need to be taken in consideration.
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Affiliation(s)
- Cynthia M Fehres
- Department of Molecular Cell Biology and Immunology, VUmc, Amsterdam, The Netherlands
| | - Hakan Kalay
- Department of Molecular Cell Biology and Immunology, VUmc, Amsterdam, The Netherlands
| | - Sven C M Bruijns
- Department of Molecular Cell Biology and Immunology, VUmc, Amsterdam, The Netherlands
| | - Sara A M Musaafir
- Department of Molecular Cell Biology and Immunology, VUmc, Amsterdam, The Netherlands
| | - Martino Ambrosini
- Department of Molecular Cell Biology and Immunology, VUmc, Amsterdam, The Netherlands
| | - Louis van Bloois
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands
| | - Sandra J van Vliet
- Department of Molecular Cell Biology and Immunology, VUmc, Amsterdam, The Netherlands
| | - Gert Storm
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands; MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
| | - Juan J Garcia-Vallejo
- Department of Molecular Cell Biology and Immunology, VUmc, Amsterdam, The Netherlands
| | - Yvette van Kooyk
- Department of Molecular Cell Biology and Immunology, VUmc, Amsterdam, The Netherlands.
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39
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Hensler HR, Tomaszewski MJ, Rappocciolo G, Rinaldo CR, Jenkins FJ. Human herpesvirus 8 glycoprotein B binds the entry receptor DC-SIGN. Virus Res 2014; 190:97-103. [PMID: 25018023 DOI: 10.1016/j.virusres.2014.07.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 06/30/2014] [Accepted: 07/02/2014] [Indexed: 01/31/2023]
Abstract
We have previously shown that human herpesvirus 8 (HHV-8) uses DC-SIGN as an entry receptor for dendritic cells, macrophages and B cells. The viral attachment protein for DC-SIGN is unknown. HHV-8 virions contain five conserved herpesvirus glycoproteins, a single unique glycoprotein, and two predicted glycoproteins. Previous studies have shown that DC-SIGN binds highly mannosylated glycoproteins. The HHV-8 glycoprotein B (gB) has been reported to be highly mannosylated, and therefore we hypothesized that gB will bind to DC-SIGN. In this report we confirm that gB has a high mannose carbohydrate structure and demonstrate for the first time that it binds DC-SIGN in a dose-dependent manner. We also identify key amino acids in the DC-SIGN carbohydrate recognition domain that are required for HHV-8 infection and compare these results with published binding regions for ICAM-2/3 and HIV-1 gp120. These results clarify some of the initial events in HHV-8 entry and can be used for the design of targeted preventive therapies.
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Affiliation(s)
- Heather R Hensler
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, Parran Hall, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Monica J Tomaszewski
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, Parran Hall, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Giovanna Rappocciolo
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, Parran Hall, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Charles R Rinaldo
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, Parran Hall, University of Pittsburgh, Pittsburgh, PA 15261, USA; Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Frank J Jenkins
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, Parran Hall, University of Pittsburgh, Pittsburgh, PA 15261, USA; Department of Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA; University of Pittsburgh Cancer Institute, 5117 Centre Avenue, Pittsburgh, PA 15213, USA.
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40
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Mitić N, Milutinović B, Janković M. CA-125 of fetal origin can act as a ligand for dendritic cell-specific ICAM-3-grabbing non-integrin. Cell Mol Biol Lett 2014; 19:249-61. [PMID: 24764143 PMCID: PMC6275607 DOI: 10.2478/s11658-014-0194-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 04/14/2014] [Indexed: 01/25/2023] Open
Abstract
CA-125 (coelomic epithelium-related antigen) forms the extracellular portion of transmembrane mucin 16 (MUC16). It is shed after proteolytic degradation. Due to structural heterogeneity, CA-125 ligand capacity and biological roles are not yet understood. In this study, we assessed CA-125 as a ligand for dendritic cell-specific ICAM-3-grabbing non-integrin (DC-SIGN), which is a C-type lectin showing specificity for mannosylated and fucosylated structures. It plays a role as a pattern recognition molecule for viral and bacterial glycans or as an adhesion receptor. We probed a human DC-SIGN-Fc chimera with CA-125 of fetal or cancer origin using solid- or fluid-phase binding and inhibition assays. The results showed that DC-SIGN binds to CA-125 of fetal origin and that this interaction is carbohydrate-dependent. By contrast, cancer-derived CA-125 displayed negligible binding. Inhibition assays indicated differences in the potency of CA-125 to interfere with DC-SIGN binding to pathogen-related glycoconjugates, such as mannan and Helicobacter pylori antigens. The differences in ligand properties between CA-125 of fetal and cancer origin may be due to specificities of glycosylation. This might influence various functions of dendritic cells based on their subset diversity and maturation-related functional capacity.
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Affiliation(s)
- Ninoslav Mitić
- Institute for the Application of Nuclear Energy, INEP, Department for Immunochemistry and Glycobiology, University of Belgrade, Banatska 31b, 11080, Zemun, Serbia,
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Chiodo F, Marradi M, Park J, Ram AFJ, Penadés S, van Die I, Tefsen B. Galactofuranose-coated gold nanoparticles elicit a pro-inflammatory response in human monocyte-derived dendritic cells and are recognized by DC-SIGN. ACS Chem Biol 2014; 9:383-9. [PMID: 24304188 DOI: 10.1021/cb4008265] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Galactofuranose (Galf) is the five-membered ring form of galactose exclusively found in nonmammalian species, among which several are pathogens. To determine the putative role of this carbohydrate in host-pathogen interactions, we synthesized multivalent gold nanoparticles carrying Galf (Galf-GNPs) and show that they are recognized by the EB-A2 antibody, which is widely used to detect Galf-containing galactomannan in the serum of Aspergillosis patients. We demonstrated that human monocyte-derived dendritic cells bound Galf-GNPs via interaction with the lectin DC-SIGN. Moreover, interaction of dendritic cells with Galf-GNPs resulted in increased expression of several maturation markers on these cells and induced secretion of the pro-inflammatory cytokines IL-6 and TNF-α. These data indicate that Galf is able to modulate the innate immune response via dendritic cells. In conclusion, Galf-GNPs are a versatile tool that can be applied in multiple functional studies to gain a better understanding of the role of Galf in host-pathogen interaction.
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Affiliation(s)
- Fabrizio Chiodo
- Laboratory of
GlycoNanotechnology, Biofunctional Nanomaterials Unit, CIC biomaGUNE, Paseo Miramón 182, 20009, San Sebastián, Spain
| | - Marco Marradi
- Laboratory of
GlycoNanotechnology, Biofunctional Nanomaterials Unit, CIC biomaGUNE, Paseo Miramón 182, 20009, San Sebastián, Spain
- Networking Research
Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Paseo Miramón 182, 20009, San Sebastián, Spain
| | - Joohae Park
- Leiden University, Institute of Biology Leiden,
Molecular Microbiology and Biotechnology, Sylviusweg 72, 2333
BE Leiden, The Netherlands
| | - Arthur F. J. Ram
- Leiden University, Institute of Biology Leiden,
Molecular Microbiology and Biotechnology, Sylviusweg 72, 2333
BE Leiden, The Netherlands
- Kluyver
Centre
for Genomics of Industrial Fermentation, P.O. Box 5057, 2600 GA Delft, The Netherlands
| | - Soledad Penadés
- Laboratory of
GlycoNanotechnology, Biofunctional Nanomaterials Unit, CIC biomaGUNE, Paseo Miramón 182, 20009, San Sebastián, Spain
- Networking Research
Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Paseo Miramón 182, 20009, San Sebastián, Spain
| | - Irma van Die
- Department
of Molecular Cell Biology and Immunology, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands
| | - Boris Tefsen
- Department
of Molecular Cell Biology and Immunology, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands
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Bloem K, Vuist IM, van den Berk M, Klaver EJ, van Die I, Knippels LMJ, Garssen J, García-Vallejo JJ, van Vliet SJ, van Kooyk Y. DCIR interacts with ligands from both endogenous and pathogenic origin. Immunol Lett 2013; 158:33-41. [PMID: 24239607 DOI: 10.1016/j.imlet.2013.11.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 10/13/2013] [Accepted: 11/05/2013] [Indexed: 11/24/2022]
Abstract
C-type lectins on dendritic cells function as antigen uptake and signaling receptors, thereby influencing cellular immune responses. Dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN) is one of the best-studied C-type lectin receptors expressed on DCs and its glycan specificity and functional requirements for ligand binding have been intensively investigated. The carbohydrate specificity of dendritic cell immunoreceptor (DCIR), another DC-expressed lectin, was still debated, but we have recently confirmed DCIR as mannose/fucose-binding lectin. Since DC-SIGN and DCIR may potentially share ligands, we set out to elucidate the interaction of DCIR with established DC-SIGN-binding ligands, by comparing the carbohydrate specificity of DCIR and DC-SIGN in more detail. Our results clearly demonstrate that DC-SIGN has a broader glycan specificity compared to DCIR, which interacts only with mannotriose, sulfo-Lewis(a), Lewis(b) and Lewis(a). While most of the tested DC-SIGN ligands bound DCIR as well, Candida albicans and some glycoproteins on some cancer cell lines were identified as DC-SIGN-specific ligands. Interestingly, DCIR strongly bound human immunodeficiency virus type 1 (HIV-1) gp140 glycoproteins, while its interaction with the well-studied DC-SIGN-binding HIV-1 ligand gp120 was much weaker. Furthermore, DCIR-specific ligands were detected on keratinocytes. Furthermore, the interaction of DCIR with its ligands was strongly influenced by the glycosylation of DCIR. In conclusion, we show that sulfo-Lewis(a) is a high affinity ligand for DCIR and that DCIR interacts with ligands from both pathogenic and endogenous origin of which most are shared by DC-SIGN.
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Affiliation(s)
- Karien Bloem
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands; Danone Research, Centre for Specialized Nutrition, Wageningen, The Netherlands
| | - Ilona M Vuist
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Meike van den Berk
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Elsenoor J Klaver
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Irma van Die
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Léon M J Knippels
- Danone Research, Centre for Specialized Nutrition, Wageningen, The Netherlands; Department of Pharmacology and Pathophysiology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, The Netherlands
| | - Johan Garssen
- Danone Research, Centre for Specialized Nutrition, Wageningen, The Netherlands; Department of Pharmacology and Pathophysiology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, The Netherlands
| | - Juan J García-Vallejo
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Sandra J van Vliet
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Yvette van Kooyk
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands.
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Association of promoter region polymorphisms of CD209 gene with clinical outcomes of dengue virus infection in Western India. INFECTION GENETICS AND EVOLUTION 2013; 17:239-42. [DOI: 10.1016/j.meegid.2013.04.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 04/17/2013] [Accepted: 04/19/2013] [Indexed: 12/30/2022]
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Bloem K, Vuist IM, van der Plas AJ, Knippels LMJ, Garssen J, García-Vallejo JJ, van Vliet SJ, van Kooyk Y. Ligand binding and signaling of dendritic cell immunoreceptor (DCIR) is modulated by the glycosylation of the carbohydrate recognition domain. PLoS One 2013; 8:e66266. [PMID: 23776650 PMCID: PMC3679074 DOI: 10.1371/journal.pone.0066266] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 05/03/2013] [Indexed: 11/18/2022] Open
Abstract
C-type lectins are innate receptors expressed on antigen-presenting cells that are involved in the recognition of glycosylated pathogens and self-glycoproteins. Upon ligand binding, internalization and/or signaling often occur. Little is known on the glycan specificity and ligands of the Dendritic Cell Immunoreceptor (DCIR), the only classical C-type lectin that contains an intracellular immunoreceptor tyrosine-based inhibitory motif (ITIM). Here we show that purified DCIR binds the glycan structures Lewisb and Man3. Interestingly, binding could not be detected when DCIR was expressed on cells. Since DCIR has an N-glycosylation site inside its carbohydrate recognition domain (CRD), we investigated the effect of this glycan in ligand recognition. Removing or truncating the glycans present on purified DCIR increased the affinity for DCIR-binding glycans. Nevertheless, altering the glycosylation status of the DCIR expressing cell or mutating the N-glycosylation site of DCIR itself did not increase glycan binding. In contrast, cis and trans interactions with glycans induced DCIR mediated signaling, resulting in a decreased phosphorylation of the ITIM sequence. These results show that glycan binding to DCIR is influenced by the glycosylation of the CRD region in DCIR and that interaction with its ligands result in signaling via its ITIM motif.
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Affiliation(s)
- Karien Bloem
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
- Danone Research, Centre for Specialized Nutrition, Wageningen, The Netherlands
| | - Ilona M. Vuist
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Arend-Jan van der Plas
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Léon M. J. Knippels
- Danone Research, Centre for Specialized Nutrition, Wageningen, The Netherlands
- Department of Pharmacology and Pathophysiology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands
| | - Johan Garssen
- Danone Research, Centre for Specialized Nutrition, Wageningen, The Netherlands
- Department of Pharmacology and Pathophysiology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands
| | - Juan J. García-Vallejo
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Sandra J. van Vliet
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
| | - Yvette van Kooyk
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
- * E-mail:
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45
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Bloem K, García-Vallejo JJ, Vuist IM, Cobb BA, van Vliet SJ, van Kooyk Y. Interaction of the Capsular Polysaccharide A from Bacteroides fragilis with DC-SIGN on Human Dendritic Cells is Necessary for Its Processing and Presentation to T Cells. Front Immunol 2013; 4:103. [PMID: 23653626 PMCID: PMC3644800 DOI: 10.3389/fimmu.2013.00103] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 04/21/2013] [Indexed: 01/08/2023] Open
Abstract
The zwitterionic capsular polysaccharide A (PSA) of Bacteroides fragilis is the first carbohydrate antigen described to be presented in major histocompatibility complex (MHC) class II for the induction of CD4+ T cell responses. However, the identity of the receptor mediating binding and internalization of PSA in antigen presenting cells remains elusive. C-type lectins are glycan-binding receptors known for their capacity to target ligands for antigen presentation to T cells. Here, we investigated whether C-type lectins were involved in the internalization of PSA and identified dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN) as the main receptor for PSA on human dendritic cells (DC). The induction of PSA-specific T cell proliferation appeared to be completely dependent on DC-SIGN. These data reveal a crucial role for DC-SIGN in the endocytosis and routing of PSA in human DC for the efficient stimulation of PSA-specific CD4+ T cells.
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Affiliation(s)
- Karien Bloem
- Department of Molecular Cell Biology and Immunology, VU University Medical Center Amsterdam, Netherlands ; Centre for Specialized Nutrition, Danone Research Wageningen, Netherlands
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Binding of HIV-1 gp120 to DC-SIGN promotes ASK-1-dependent activation-induced apoptosis of human dendritic cells. PLoS Pathog 2013; 9:e1003100. [PMID: 23382671 PMCID: PMC3561151 DOI: 10.1371/journal.ppat.1003100] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Accepted: 10/23/2012] [Indexed: 11/19/2022] Open
Abstract
During disease progression to AIDS, HIV-1 infected individuals become increasingly immunosuppressed and susceptible to opportunistic infections. It has also been demonstrated that multiple subsets of dendritic cells (DC), including DC-SIGN(+) cells, become significantly depleted in the blood and lymphoid tissues of AIDS patients, which may contribute to the failure in initiating effective host immune responses. The mechanism for DC depletion, however, is unclear. It is also known that vast quantities of viral envelope protein gp120 are shed from maturing HIV-1 virions and form circulating immune complexes in the serum of HIV-1-infected individuals, but the pathological role of gp120 in HIV-1 pathogenesis remains elusive. Here we describe a previously unrecognized mechanism of DC death in chronic HIV-1 infection, in which ligation of DC-SIGN by gp120 sensitizes DC to undergo accelerated apoptosis in response to a variety of activation stimuli. The cultured monocyte-derived DC and also freshly-isolated DC-SIGN(+) blood DC that were exposed to either cross-linked recombinant gp120 or immune-complex gp120 in HIV(+) serum underwent considerable apoptosis after CD40 ligation or exposure to bacterial lipopolysaccharide (LPS) or pro-inflammatory cytokines such as TNFα and IL-1β. Furthermore, circulating DC-SIGN(+) DC that were isolated directly from HIV-1(+) individuals had actually been pre-sensitized by serum gp120 for activation-induced exorbitant apoptosis. In all cases the DC apoptosis was substantially inhibited by DC-SIGN blockade. Finally, we showed that accelerated DC apoptosis was a direct consequence of excessive activation of the pro-apoptotic molecule ASK-1 and transfection of siRNA against ASK-1 significantly prevented the activation-induced excessive DC death. Our study discloses a previously unknown mechanism of immune modulation by envelope protein gp120, provides new insights into HIV immunopathogenesis, and suggests potential therapeutic approaches to prevent DC depletion in chronic HIV infection. HIV-1 infected individuals become increasingly immunocompromised and susceptible to opportunistic infection during disease progression, which is associated with significant reduction of the dendritic cell number in the peripheral blood or secondary lymphoid tissues. Because dendritic cells are the most powerful antigen-presenting cells, their survival is critical for host defence and inadequate dendritic cell number will fail to induce effective host immune responses. Here we describe a mechanism that may at least partly explain why dendritic cells become significantly depleted in chronic HIV-1 infection. We found that after binding of the HIV-1 envelope protein gp120 to the dendritic cell surface protein DC-SIGN, the subsequent activation by CD40 ligation, or by exposure to bacterial product lipopolysaccharide or pro-inflammatory cytokines such as TNF-α and IL-1β, will lead to overexpression of pro-apoptotic molecule ASK-1, resulting in excessive dendritic cell death. We also confirmed that DC-SIGN(+) dendritic cells in the blood of HIV-1 infected individuals have actually been pre-sensitized by viral gp120, which exists in vast amount in the blood, for activation-induced exorbitant death. Our study thus reveals a previously unknown pathway for dendritic cell depletion and provides clues for potential therapeutic approaches to prevent DC depletion in chronic HIV infection.
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Klaver EJ, Kuijk LM, Laan LC, Kringel H, van Vliet SJ, Bouma G, Cummings RD, Kraal G, van Die I. Trichuris suis-induced modulation of human dendritic cell function is glycan-mediated. Int J Parasitol 2012; 43:191-200. [PMID: 23220043 DOI: 10.1016/j.ijpara.2012.10.021] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 10/24/2012] [Accepted: 10/25/2012] [Indexed: 12/22/2022]
Abstract
Human monocyte-derived dendritic cells (DCs) show remarkable phenotypic changes upon direct contact with soluble products (SPs) of Trichuris suis, a pig whipworm that is experimentally used in therapies to ameliorate inflammation in patients with Crohn's disease and multiple sclerosis. These changes may contribute to the observed induction of a T helper 2 (Th2) response and the suppression of Toll-like receptor (TLR)-induced Th1 and Th17 responses by human DCs primed with T. suis SPs. Here it is demonstrated that glycans of T. suis SPs contribute significantly to the suppression of the lipopolysaccharide (LPS)-induced expression in DCs of a broad variety of cytokines and chemokines, including important pro-inflammatory mediators such as TNF-α, IL-6, IL-12, lymphotoxin α (LTA), C-C Motif Ligand (CCL)2, C-X-C Motif Ligands (CXCL)9 and CXCL10. In addition, the data show that human DCs strongly bind T. suis SP-glycans via the C-type lectin receptors (CLRs) mannose receptor (MR) and DC-specific ICAM-3-grabbing non-integrin (DC-SIGN). The interaction of DCs with T. suis glycans likely involves mannose-type glycans, rather than fucosylated glycans, which differs from DC binding to soluble egg antigens of the human worm parasite, Schistosoma mansoni. In addition, macrophage galactose-type lectin (MGL) recognises T. suis SPs, which may contribute to the interaction with immature DCs or other MGL-expressing immune cells such as macrophages. The interaction of T. suis glycans with CLRs of human DCs may be essential for the ability of T. suis to suppress a pro-inflammatory phenotype of human DCs. The finding that the T. suis-induced modulation of human DC function is glycan-mediated is novel and indicates that helminth glycans contribute to the dampening of inflammation in a wide range of human inflammatory diseases.
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Affiliation(s)
- Elsenoor J Klaver
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands
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Abstract
The dynamics of HIV-1 viremia is a complex and evolving landscape with clinical and epidemiological (public health) implications. Most studies have relied on the use of set-point viral load (VL) as a readily available proxy of viral dynamics to assess host and viral correlates. This review highlights recent findings from population-based studies of set-point VL, focusing primarily on robust data related to host genetics. A comprehensive understanding of viral dynamics will clearly need to consider both host and viral characteristics, with close attention to (i) the timing of VL measurements, (ii) the biology of viral evolution, (iii) compartments of active viral replication, (iv) the transmission source partner as the immediate past microenvironment, and (v) proper application of statistical models.
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Affiliation(s)
- Heather A. Prentice
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama;
- Author to whom correspondence should be addressed; ; Tel.: +1-720-352-3432
| | - Jianming Tang
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama;
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama;
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Driessen NN, Boshoff HI, Maaskant JJ, Gilissen SA, Vink S, van der Sar AM, Vandenbroucke-Grauls CM, Bewley CA, Appelmelk BJ, Geurtsen J. Cyanovirin-N inhibits mannose-dependent Mycobacterium-C-type lectin interactions but does not protect against murine tuberculosis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2012; 189:3585-92. [PMID: 22942435 PMCID: PMC3448799 DOI: 10.4049/jimmunol.1102408] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Cyanovirin-N (CV-N) is a mannose-binding lectin that inhibits HIV-1 infection by blocking mannose-dependent target cell entry via C-type lectins. Like HIV-1, Mycobacterium tuberculosis expresses mannosylated surface structures and exploits C-type lectins to gain cell access. In this study, we investigated whether CV-N, like HIV-1, can inhibit M. tuberculosis infection. We found that CV-N specifically interacted with mycobacteria by binding to the mannose-capped lipoglycan lipoarabinomannan. Furthermore, CV-N competed with the C-type lectins DC-SIGN and mannose receptor for ligand binding and inhibited the binding of M. tuberculosis to dendritic cells but, unexpectedly, not to macrophages. Subsequent in vivo infection experiments in a mouse model demonstrated that, despite its activity, CV-N did not inhibit or delay M. tuberculosis infection. This outcome argues against a critical role for mannose-dependent C-type lectin interactions during the initial stages of murine M. tuberculosis infection and suggests that, depending on the circumstances, M. tuberculosis can productively infect cells using different modes of entry.
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Affiliation(s)
- Nicole N. Driessen
- Department of Medical Microbiology and Infection Control, Free university medical center, 1081 BT Amsterdam, the Netherlands
| | - Helena I.M. Boshoff
- Tuberculosis Research Section, Laboratory of Clinical Infectious Diseases, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Janneke J. Maaskant
- Department of Medical Microbiology and Infection Control, Free university medical center, 1081 BT Amsterdam, the Netherlands
| | - Sebastiaan A.C. Gilissen
- Department of Medical Microbiology and Infection Control, Free university medical center, 1081 BT Amsterdam, the Netherlands
| | - Simone Vink
- Department of Medical Microbiology and Infection Control, Free university medical center, 1081 BT Amsterdam, the Netherlands
| | - Astrid M. van der Sar
- Department of Medical Microbiology and Infection Control, Free university medical center, 1081 BT Amsterdam, the Netherlands
| | | | - Carole A. Bewley
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Ben J. Appelmelk
- Department of Medical Microbiology and Infection Control, Free university medical center, 1081 BT Amsterdam, the Netherlands
| | - Jeroen Geurtsen
- Department of Medical Microbiology and Infection Control, Free university medical center, 1081 BT Amsterdam, the Netherlands
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50
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Ectopic ATP synthase facilitates transfer of HIV-1 from antigen-presenting cells to CD4(+) target cells. Blood 2012; 120:1246-53. [PMID: 22753871 DOI: 10.1182/blood-2011-12-399063] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Antigen-presenting cells (APCs) act as vehicles that transfer HIV to their target CD4(+) cells through an intercellular junction, termed the virologic synapse. The molecules that are involved in this process remain largely unidentified. In this study, we used photoaffinity labeling and a proteomic approach to identify new proteins that facilitate HIV-1 transfer. We identified ectopic mitochondrial ATP synthase as a factor that mediates HIV-1 transfer between APCs and CD4(+) target cells. Monoclonal antibodies against the β-subunit of ATP synthase inhibited APC-mediated transfer of multiple strains HIV-1 to CD4(+) target cells. Likewise, the specific inhibitors of ATPase, citreoviridin and IF1, completely blocked APC-mediated transfer of HIV-1 at the APC-target cell interaction step. Confocal fluorescent microscopy showed localization of extracellular ATP synthase at junctions between APC and CD4(+) target cells. We conclude that ectopic ATP synthase could be an accessible molecular target for inhibiting HIV-1 proliferation in vivo.
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