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Zhu W, Zhou Y, Guo L, Feng S. Biological function of sialic acid and sialylation in human health and disease. Cell Death Discov 2024; 10:415. [PMID: 39349440 PMCID: PMC11442784 DOI: 10.1038/s41420-024-02180-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2024] [Revised: 09/08/2024] [Accepted: 09/12/2024] [Indexed: 10/02/2024] Open
Abstract
Sialic acids are predominantly found at the terminal ends of glycoproteins and glycolipids and play key roles in cellular communication and function. The process of sialylation, a form of post-translational modification, involves the covalent attachment of sialic acid to the terminal residues of oligosaccharides and glycoproteins. This modification not only provides a layer of electrostatic repulsion to cells but also serves as a receptor for various biological signaling pathways. Sialylation is involved in several pathophysiological processes. Given its multifaceted involvement in cellular functions, sialylation presents a promising avenue for therapeutic intervention. Current studies are exploring agents that target sialic acid residues on sialoglycans or the sialylation process. These efforts are particularly focused on the fields of cancer therapy, stroke treatment, antiviral strategies, and therapies for central nervous system disorders. In this review, we aimed to summarize the biological functions of sialic acid and the process of sialylation, explore their roles in various pathophysiological contexts, and discuss their potential applications in the development of novel therapeutics.
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Affiliation(s)
- Wengen Zhu
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yue Zhou
- Department of Ophthalmology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Linjuan Guo
- Department of Cardiology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, China.
| | - Shenghui Feng
- Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
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Peiffer AL, Dugan AE, Kiessling LL. Soluble Human Lectins at the Host-Microbe Interface. Annu Rev Biochem 2024; 93:565-601. [PMID: 38640018 PMCID: PMC11296910 DOI: 10.1146/annurev-biochem-062917-012322] [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] [Indexed: 04/21/2024]
Abstract
Human lectins are integral to maintaining microbial homeostasis on the skin, in the blood, and at mucosal barriers. These proteins can recognize microbial glycans and inform the host about its microbial status. In accordance with their roles, their production can vary with tissue type. They also can have unique structural and biochemical properties, and they can influence microbial colonization at sites proximal and distal to their tissue of origin. In line with their classification as innate immune proteins, soluble lectins have long been studied in the context of acute infectious disease, but only recently have we begun to appreciate their roles in maintaining commensal microbial communities (i.e., the human microbiota). This review provides an overview of soluble lectins that operate at host-microbe interfaces, their glycan recognition properties, and their roles in physiological and pathological mechanisms.
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Affiliation(s)
- Amanda L Peiffer
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA;
| | - A E Dugan
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA;
| | - L L Kiessling
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA;
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Yan T, Sun J, Zheng J, Yang J. An analysis combining proteomics and transcriptomics revealed a regulation target of sea cucumber autolysis. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2024; 52:101274. [PMID: 38906042 DOI: 10.1016/j.cbd.2024.101274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 06/05/2024] [Accepted: 06/09/2024] [Indexed: 06/23/2024]
Abstract
Sea cucumber is a valuable seafood product and autolysis is the main concern for the aquaculture industry. This study employed proteomics and transcriptomics to investigate the autolysis mechanism of sea cucumbers. The fresh sea cucumber was exposed to UV light to induce autolysis. The body wall samples were cut off to analyze by proteomics and transcriptomics. The angiotensin-converting enzyme (ACE) inhibitor of teprotide and the activator of imatinib were gastric gavage to live sea cucumbers, respectively, to identify the regulation target. Autolysis occurrence was evaluated by appearance, soluble peptide, and hydroxyproline content. Four gene-protein pairs were ACE, AJAP10923, Heme-binding protein 2-like, and Ficolin-2-like. Only the ACE protein and gene changed synchronously and a significant down-regulation of ACE occurred in the autolysis sea cucumbers. Teprotide led to a 1.58-fold increase in the TCA-soluble protein content and a 1.57-fold increase in hydroxyproline content. No significant differences were observed between imatinib-treated sea cucumbers and fresh ones regarding TCA-soluble protein content or hydroxyproline levels (P > 0.05). ACE inhibitor accelerated the autolysis of sea cucumber, but ACE activator inhibited the autolysis. Therefore, ACE can serve as a regulatory target for autolysis in sea cucumbers.
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Affiliation(s)
- Tingting Yan
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Jinghe Sun
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China
| | - Jie Zheng
- Liaoning Ocean and Fisheries Science Research Institute, Dalian, China
| | - Jingfeng Yang
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
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Lyu Y, Chen S, Zhao Y, Yuan H, Zhang C, Zhang C, Meng Q. Effect of GM1 concentration change on plasma membrane: molecular dynamics simulation and analysis. Phys Chem Chem Phys 2024; 26:12552-12563. [PMID: 38595108 DOI: 10.1039/d3cp06161b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Ganglioside GM1 is a class of glycolipids predominantly located in the nervous system. Comprising a ceramide anchor and an oligosaccharide chain containing sialic acid, GM1 plays a pivotal role in various cellular processes, including signal transduction, cell adhesion, and membrane organization. Moreover, GM1 has been implicated in the pathogenesis of several neurological disorders, such as Parkinson's disease, Alzheimer's disease, and stroke. In this study, by creating a neural cell model membrane simulation system and employing rigorous molecular models, we utilize a coarse-grained molecular dynamics approach to explore the structural and dynamic characteristics of multi-component neuronal plasma membranes at varying GM1 ganglioside concentrations. The simulation results reveal that as GM1 concentration increases, a greater number of hydrogen bonds form between GM1 molecules, resulting in the formation of larger clusters, which leads to reduced membrane fluidity, increased lipid ordering, decreased membrane thickness and surface area and higher levels of GM1 dissociation. Through a meticulous analysis, while considering GM1's structural attributes, we offer valuable insights into the structural and dynamic traits of the cell membrane. This study provides a robust methodology for exploring membrane characteristics and enhances our comprehension of GM1 molecules, serving as a resource for both experimental and computational researchers in this field.
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Affiliation(s)
- Yongkang Lyu
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, People's Republic of China.
| | - Shuo Chen
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, People's Republic of China.
| | - Yu Zhao
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, People's Republic of China.
| | - Hongxiu Yuan
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, People's Republic of China.
| | - Chenyang Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, People's Republic of China.
| | - Changzhe Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, People's Republic of China.
| | - Qingtian Meng
- School of Physics and Electronics, Shandong Normal University, Jinan, 250014, People's Republic of China.
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Dudler T, Yaseen S, Cummings WJ. Development and characterization of narsoplimab, a selective MASP-2 inhibitor, for the treatment of lectin-pathway-mediated disorders. Front Immunol 2023; 14:1297352. [PMID: 38022610 PMCID: PMC10663225 DOI: 10.3389/fimmu.2023.1297352] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 10/25/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction Overactivation of the lectin pathway of complement plays a pathogenic role in a broad range of immune-mediated and inflammatory disorders; mannan-binding lectin-associated serine protease-2 (MASP-2) is the key effector enzyme of the lectin pathway. We developed a fully human monoclonal antibody, narsoplimab, to bind to MASP-2 and specifically inhibit lectin pathway activation. Herein, we describe the preclinical characterization of narsoplimab that supports its evaluation in clinical trials. Methods and results ELISA binding studies demonstrated that narsoplimab interacted with both zymogen and enzymatically active forms of human MASP-2 with high affinity (KD 0.062 and 0.089 nM, respectively) and a selectivity ratio of >5,000-fold relative to closely related serine proteases C1r, C1s, MASP-1, and MASP-3. Interaction studies using surface plasmon resonance and ELISA demonstrated approximately 100-fold greater binding affinity for intact narsoplimab compared to a monovalent antigen binding fragment, suggesting an important contribution of functional bivalency to high-affinity binding. In functional assays conducted in dilute serum under pathway-specific assay conditions, narsoplimab selectively inhibited lectin pathway-dependent activation of C5b-9 with high potency (IC50 ~ 1 nM) but had no observable effect on classical pathway or alternative pathway activity at concentrations up to 500 nM. In functional assays conducted in 90% serum, narsoplimab inhibited lectin pathway activation in human serum with high potency (IC50 ~ 3.4 nM) whereas its potency in cynomolgus monkey serum was approximately 10-fold lower (IC50 ~ 33 nM). Following single dose intravenous administration to cynomolgus monkeys, narsoplimab exposure increased in an approximately dose-proportional manner. Clear dose-dependent pharmacodynamic responses were observed at doses >1.5 mg/kg, as evidenced by a reduction in lectin pathway activity assessed ex vivo that increased in magnitude and duration with increasing dose. Analysis of pharmacokinetic and pharmacodynamic data revealed a well-defined concentration-effect relationship with an ex vivo EC50 value of approximately 6.1 μg/mL, which was comparable to the in vitro functional potency (IC50 33 nM; ~ 5 μg/mL). Discussion Based on these results, narsoplimab has been evaluated in clinical trials for the treatment of conditions associated with inappropriate lectin pathway activation, such as hematopoietic stem cell transplantation-associated thrombotic microangiopathy.
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Affiliation(s)
- Thomas Dudler
- Discovery, Omeros Corporation, Seattle, WA, United States
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Herrera-Marcos LV, Sahali D, Ollero M. 9-O Acetylated Gangliosides in Health and Disease. Biomolecules 2023; 13:biom13050827. [PMID: 37238697 DOI: 10.3390/biom13050827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/05/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Glycosphingolipids comprise a lipid class characterized by the presence of sugar moieties attached to a ceramide backbone. The role of glycosphingolipids in pathophysiology has gained relevance in recent years in parallel with the development of analytical technologies. Within this vast family of molecules, gangliosides modified by acetylation represent a minority. Described for the first time in the 1980s, their relation to pathologies has resulted in increased interest in their function in normal and diseased cells. This review presents the state of the art on 9-O acetylated gangliosides and their link to cellular disorders.
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Affiliation(s)
| | - Dil Sahali
- Univ Paris Est Creteil, INSERM, IMRB, F-94010 Creteil, France
- AP-HP, Hôpitaux Universitaires Henri Mondor, Service de Néphrologie, F-94010 Creteil, France
| | - Mario Ollero
- Univ Paris Est Creteil, INSERM, IMRB, F-94010 Creteil, France
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Abstract
Through their specific interactions with proteins, cellular glycans play key roles in a wide range of physiological and pathological processes. One of the main goals of research in the areas of glycobiology and glycomedicine is to understand glycan-protein interactions at the molecular level. Over the past two decades, glycan microarrays have become powerful tools for the rapid evaluation of interactions between glycans and proteins. In this review, we briefly describe methods used for the preparation of glycan probes and the construction of glycan microarrays. Next, we highlight applications of glycan microarrays to rapid profiling of glycan-binding patterns of plant, animal and pathogenic lectins, as well as other proteins. Finally, we discuss other important uses of glycan microarrays, including the rapid analysis of substrate specificities of carbohydrate-active enzymes, the quantitative determination of glycan-protein interactions, discovering high-affinity or selective ligands for lectins, and identifying functional glycans within cells. We anticipate that this review will encourage researchers to employ glycan microarrays in diverse glycan-related studies.
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Affiliation(s)
- Yujun Kim
- Department of Chemistry, Yonsei University, 03722 Seoul, Republic of Korea.
| | - Ji Young Hyun
- Department of Drug Discovery, Data Convergence Drug Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea.
| | - Injae Shin
- Department of Chemistry, Yonsei University, 03722 Seoul, Republic of Korea.
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Große-Berkenbusch K, Avci-Adali M, Arnold M, Cahalan L, Cahalan P, Velic A, Maček B, Schlensak C, Wendel HP, Stoppelkamp S. Profiling of time-dependent human plasma protein adsorption on non-coated and heparin-coated oxygenator membranes. BIOMATERIALS ADVANCES 2022; 139:213014. [PMID: 35882160 DOI: 10.1016/j.bioadv.2022.213014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 06/02/2022] [Accepted: 06/30/2022] [Indexed: 01/07/2023]
Abstract
Patients with severe lung diseases are highly dependent on lung support systems. Despite many improvements, long-term use is not possible, mainly because of the strong body defence reactions (e.g. coagulation, complement system, inflammation and cell activation). The systematic characterization of adsorbed proteins on the gas exchange membrane of the lung system over time can provide insights into the course of various defence reactions and identify possible targets for surface modifications. Using comprehensive mass spectrometry analyses of desorbed proteins, we were able to identify for the first time binding profiles of over 500 proteins over a period of six hours on non-coated and heparin-coated PMP hollow fiber membranes. We observed a higher degree of remodeling of the protein layer on the non-coated membrane than on the coated membrane. In general, there was a higher protein binding on the coated membrane with exception of proteins with a heparin-binding site. Focusing on the most important pathways showed that almost all coagulation factors bound in higher amounts to the non-coated membranes. Furthermore, we could show that the initiator proteins of the complement system bound stronger to the heparinized membranes, but the subsequently activated proteins bound stronger to the non-coated membranes, thus complement activation on heparinized surfaces is mainly due to the alternative complement pathway. Our results provide a comprehensive insight into plasma protein adsorption on oxygenator membranes over time and point to new ways to better understand the processes on the membranes and to develop new specific surface modifications.
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Affiliation(s)
- Katharina Große-Berkenbusch
- Clinical Research Laboratory, Department of Thoracic and Cardiovascular Surgery, University Hospital Tübingen, University of Tübingen, Calwerstr. 7/1, 72076 Tübingen, Germany
| | - Meltem Avci-Adali
- Clinical Research Laboratory, Department of Thoracic and Cardiovascular Surgery, University Hospital Tübingen, University of Tübingen, Calwerstr. 7/1, 72076 Tübingen, Germany
| | - Madeleine Arnold
- Clinical Research Laboratory, Department of Thoracic and Cardiovascular Surgery, University Hospital Tübingen, University of Tübingen, Calwerstr. 7/1, 72076 Tübingen, Germany
| | - Linda Cahalan
- Ension Inc, 508 Pittsburg Road, Butler, PA 16002, United States of America
| | - Patrick Cahalan
- Ension Inc, 508 Pittsburg Road, Butler, PA 16002, United States of America
| | - Ana Velic
- Proteome Center Tübingen, Interfaculty Institute for Cell Biology, University of Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany
| | - Boris Maček
- Proteome Center Tübingen, Interfaculty Institute for Cell Biology, University of Tübingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany
| | - Christian Schlensak
- Clinical Research Laboratory, Department of Thoracic and Cardiovascular Surgery, University Hospital Tübingen, University of Tübingen, Calwerstr. 7/1, 72076 Tübingen, Germany
| | - Hans Peter Wendel
- Clinical Research Laboratory, Department of Thoracic and Cardiovascular Surgery, University Hospital Tübingen, University of Tübingen, Calwerstr. 7/1, 72076 Tübingen, Germany
| | - Sandra Stoppelkamp
- Clinical Research Laboratory, Department of Thoracic and Cardiovascular Surgery, University Hospital Tübingen, University of Tübingen, Calwerstr. 7/1, 72076 Tübingen, Germany.
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Molecularly imprinted and cladded nanoparticles for high-affinity recognition of structurally closed gangliosides. Mikrochim Acta 2022; 189:289. [PMID: 35879493 DOI: 10.1007/s00604-022-05395-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 06/22/2022] [Indexed: 10/16/2022]
Abstract
A new method called reverse microemulsion-confined ganglioside-oriented surface imprinting and cladding (RM-GOSIC) is presented for controllable preparation of nanoscale binders for high-affinity targeting gangliosides. Using GM1a, an affordable ganglioside, as a representative ganglioside target, single-core quantum dot GM1a-imprinted and GM1a-cladded polymer (cMIP) nanoparticles were prepared. The prepared cMIP nanoparticles exhibited extremely high affinity towards GM1a, with dissociation constant at the nanomolar level (3-6 nM). The prepared cMIP nanoparticles also recognized structurally closed gangliosides while their cross-reactivity towards other gangliosides remained low. The potential of the cMIP nanoparticles in biomedical applications was demonstrated by cell and tissue imaging. Thus, this approach opened a new access to the synthesis of high-affinity nanoscale binders for targeting gangliosides.
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Bond NG, Fahlberg MD, Yu S, Rout N, Tran D, Fitzpatrick-Schmidt T, Sprehe LM, Scheef EA, Mudd JC, Schaub R, Kaur A. Immunomodulatory potential of in vivo natural killer T (NKT) activation by NKTT320 in Mauritian-origin cynomolgus macaques. iScience 2022; 25:103889. [PMID: 35243248 PMCID: PMC8866157 DOI: 10.1016/j.isci.2022.103889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 12/22/2021] [Accepted: 02/04/2022] [Indexed: 11/13/2022] Open
Abstract
Invariant natural killer T-lymphocytes (iNKT) are unique immunomodulatory innate T cells with an invariant TCRα recognizing glycolipids presented on MHC class-I-like CD1d molecules. Activated iNKT rapidly secrete pro-and anti-inflammatory cytokines, potentiate immunity, and modulate inflammation. Here, we report the effects of in vivo iNKT activation in Mauritian-origin cynomolgus macaques by a humanized monoclonal antibody, NKTT320, that binds to the invariant region of the iNKT TCR. NKTT320 led to rapid iNKT activation, increased polyfunctionality, and elevation of multiple plasma analytes within 24 hours. Flow cytometry and RNA-Seq confirmed downstream activation of multiple immune subsets, enrichment of JAK/STAT and PI3K/AKT pathway genes, and upregulation of inflammation-modulating genes. NKTT320 also increased iNKT frequency in adipose tissue and did not cause iNKT anergy. Our data indicate that NKTT320 has a sustained effect on in vivo iNKT activation, potentiation of innate and adaptive immunity, and resolution of inflammation, which supports its future use as an immunotherapeutic. NKTT320 rapidly activates iNKT in vivo, modulating downstream immune function In vivo NKTT320 treatment modulates pro- and anti-inflammatory genes NKTT320 treatment results in activation of innate and adaptive immune subsets NKTT320 has promise as an immunotherapeutic with translational potential
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First Insights into the Repertoire of Secretory Lectins in Rotifers. Mar Drugs 2022; 20:md20020130. [PMID: 35200659 PMCID: PMC8878817 DOI: 10.3390/md20020130] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/04/2022] [Accepted: 02/07/2022] [Indexed: 02/06/2023] Open
Abstract
Due to their high biodiversity and adaptation to a mutable and challenging environment, aquatic lophotrochozoan animals are regarded as a virtually unlimited source of bioactive molecules. Among these, lectins, i.e., proteins with remarkable carbohydrate-recognition properties involved in immunity, reproduction, self/nonself recognition and several other biological processes, are particularly attractive targets for biotechnological research. To date, lectin research in the Lophotrochozoa has been restricted to the most widespread phyla, which are the usual targets of comparative immunology studies, such as Mollusca and Annelida. Here we provide the first overview of the repertoire of the secretory lectin-like molecules encoded by the genomes of six target rotifer species: Brachionus calyciflorus, Brachionus plicatilis, Proales similis (class Monogononta), Adineta ricciae, Didymodactylos carnosus and Rotaria sordida (class Bdelloidea). Overall, while rotifer secretory lectins display a high molecular diversity and belong to nine different structural classes, their total number is significantly lower than for other groups of lophotrochozoans, with no evidence of lineage-specific expansion events. Considering the high evolutionary divergence between rotifers and the other major sister phyla, their widespread distribution in aquatic environments and the ease of their collection and rearing in laboratory conditions, these organisms may represent interesting targets for glycobiological studies, which may allow the identification of novel carbohydrate-binding proteins with peculiar biological properties.
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Li Z, Unione L, Liu L, Lang Y, de Vries RP, de Groot RJ, Boons GJ. Synthetic O-Acetylated Sialosides and their Acetamido-deoxy Analogues as Probes for Coronaviral Hemagglutinin-esterase Recognition. J Am Chem Soc 2022; 144:424-435. [PMID: 34967208 DOI: 10.1021/jacs.1c10329] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
O-Acetylation is a common modification of sialic acids that can occur at carbons 4-, 7-, 8-, and/or 9. Acetylated sialosides are employed as receptors by several betacoronaviruses and toroviruses, and by influenza C and D viruses. The molecular basis by which these viruses recognize specific O-acetylated sialosides is poorly understood, and it is unknown how viruses have evolved to recognize specific O-acetylated sialosides expressed by their host. Here, we describe a chemoenzymatic approach that can readily provide sialoglycan analogues in which acetyl esters at C4 and/or C7 are replaced by stabilizing acetamide moieties. The analogues and their natural counterparts were used to examine the ligand requirements of the lectin domain of coronaviral hemagglutinin-esterases (HEs). It revealed that HEs from viruses targeting different host species exhibit different requirements for O-acetylation. It also showed that ester-to-amide perturbation results in decreased or loss of binding. STD NMR and molecular modeling of the complexes of the HE of BCoV with the acetamido analogues and natural counterparts revealed that binding is governed by the complementarity between the acetyl moieties of the sialosides and the hydrophobic patches of the lectin. The precise spatial arrangement of these elements is important, and an ester-to-amide perturbation results in substantial loss of binding. Molecular Dynamics simulations with HEs from coronaviruses infecting other species indicate that these viruses have adapted their HE specificity by the incorporation of hydrophobic or hydrophilic elements to modulate acetyl ester recognition.
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Affiliation(s)
- Zeshi Li
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht 3584 CG, The Netherlands
| | - Luca Unione
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht 3584 CG, The Netherlands
| | - Lin Liu
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Yifei Lang
- Virology Division, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht 3584 CL, The Netherlands
| | - Robert P de Vries
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht 3584 CG, The Netherlands
| | - Raoul J de Groot
- Virology Division, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht 3584 CL, The Netherlands
| | - Geert-Jan Boons
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht 3584 CG, The Netherlands
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
- Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht 3584, The Netherlands
- Chemistry Department, University of Georgia, Athens, Georgia 30602, United States
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Keating T, Lethbridge S, Allnutt JC, Hendon-Dunn CL, Thomas SR, Alderwick LJ, Taylor SC, Bacon J. Mycobacterium tuberculosis modifies cell wall carbohydrates during biofilm growth with a concomitant reduction in complement activation. ACTA ACUST UNITED AC 2021; 7:100065. [PMID: 34778603 PMCID: PMC8577165 DOI: 10.1016/j.tcsw.2021.100065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 10/04/2021] [Indexed: 11/26/2022]
Abstract
The development of new vaccines for TB needs to be underpinned by an understanding of both the molecular and cellular mechanisms of host-pathogen interactions and how the immune response can be modulated to achieve protection from disease. Complement orchestrates many aspects of the innate and adaptive immune responses. However, little is known about the contribution of the complement pathways during TB disease, particularly with respect to mycobacterial phenotype. Extracellular communities (biofilms) of M. tuberculosis are found in the acellular rim of granulomas, during disease, and these are likely to be present in post-primary TB episodes, in necrotic lesions. Our study aimed to determine which mycobacterial cell wall components were altered during biofilm growth and how these cell wall alterations modified the complement response. We have shown that M. tuberculosis biofilms modified their cell wall carbohydrates and elicited reduced classical and lectin pathway activation. Consistent with this finding was the reduction of C3b/iC3b deposition on biofilm cell wall carbohydrate extracts. Here, we have highlighted the role of cell wall carbohydrate alterations during biofilm growth of M. tuberculosis and subsequent modulation of complement activation.
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Affiliation(s)
- Thomas Keating
- TB Discovery Group, National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, United Kingdom.,School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Samuel Lethbridge
- TB Discovery Group, National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, United Kingdom
| | - Jon C Allnutt
- TB Discovery Group, National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, United Kingdom
| | - Charlotte L Hendon-Dunn
- TB Discovery Group, National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, United Kingdom
| | - Stephen R Thomas
- Pathogen Immunology Group, National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, United Kingdom
| | - Luke J Alderwick
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Stephen C Taylor
- Pathogen Immunology Group, National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, United Kingdom
| | - Joanna Bacon
- TB Discovery Group, National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, United Kingdom
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Wang Y, Khan A, Antonopoulos A, Bouché L, Buckley CD, Filer A, Raza K, Li KP, Tolusso B, Gremese E, Kurowska-Stolarska M, Alivernini S, Dell A, Haslam SM, Pineda MA. Loss of α2-6 sialylation promotes the transformation of synovial fibroblasts into a pro-inflammatory phenotype in arthritis. Nat Commun 2021; 12:2343. [PMID: 33879788 PMCID: PMC8058094 DOI: 10.1038/s41467-021-22365-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 02/26/2021] [Indexed: 02/02/2023] Open
Abstract
In healthy joints, synovial fibroblasts (SFs) provide the microenvironment required to mediate homeostasis, but these cells adopt a pathological function in rheumatoid arthritis (RA). Carbohydrates (glycans) on cell surfaces are fundamental regulators of the interactions between stromal and immune cells, but little is known about the role of the SF glycome in joint inflammation. Here we study stromal guided pathophysiology by mapping SFs glycosylation pathways. Combining transcriptomic and glycomic analysis, we show that transformation of fibroblasts into pro-inflammatory cells is associated with glycan remodeling, a process that involves TNF-dependent inhibition of the glycosyltransferase ST6Gal1 and α2-6 sialylation. SF sialylation correlates with distinct functional subsets in murine experimental arthritis and remission stages in human RA. We propose that pro-inflammatory cytokines remodel the SF-glycome, converting the synovium into an under-sialylated and highly pro-inflammatory microenvironment. These results highlight the importance of glycosylation in stromal immunology and joint inflammation.
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Affiliation(s)
- Yilin Wang
- grid.8756.c0000 0001 2193 314XInstitute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Aneesah Khan
- grid.8756.c0000 0001 2193 314XInstitute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | | | - Laura Bouché
- grid.7445.20000 0001 2113 8111Department of Life Sciences, Imperial College London, London, UK
| | - Christopher D. Buckley
- grid.6572.60000 0004 1936 7486Rheumatology Research Group, Institute for Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Queen Elizabeth Hospital, Birmingham, UK ,grid.4991.50000 0004 1936 8948The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK ,Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), Glasgow, Birmingham, Newcastle Oxford, UK
| | - Andrew Filer
- grid.6572.60000 0004 1936 7486Rheumatology Research Group, Institute for Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Queen Elizabeth Hospital, Birmingham, UK ,Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), Glasgow, Birmingham, Newcastle Oxford, UK
| | - Karim Raza
- grid.6572.60000 0004 1936 7486Rheumatology Research Group, Institute for Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Queen Elizabeth Hospital, Birmingham, UK ,grid.412919.6Sandwell and West Birmingham Hospitals NHS Trust, Birmingham, UK
| | - Kun-Ping Li
- grid.411847.f0000 0004 1804 4300Institute of Chinese Medicinal Sciences, Guangdong Pharmaceutical University, Guangzhou, China
| | - Barbara Tolusso
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), Glasgow, Birmingham, Newcastle Oxford, UK ,grid.414603.4Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Elisa Gremese
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), Glasgow, Birmingham, Newcastle Oxford, UK ,grid.414603.4Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Mariola Kurowska-Stolarska
- grid.8756.c0000 0001 2193 314XInstitute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK ,Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), Glasgow, Birmingham, Newcastle Oxford, UK
| | - Stefano Alivernini
- Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), Glasgow, Birmingham, Newcastle Oxford, UK ,grid.414603.4Division of Rheumatology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy ,grid.8142.f0000 0001 0941 3192Division of Rheumatology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Anne Dell
- grid.7445.20000 0001 2113 8111Department of Life Sciences, Imperial College London, London, UK
| | - Stuart M. Haslam
- grid.7445.20000 0001 2113 8111Department of Life Sciences, Imperial College London, London, UK
| | - Miguel A. Pineda
- grid.8756.c0000 0001 2193 314XInstitute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK ,Research into Inflammatory Arthritis Centre Versus Arthritis (RACE), Glasgow, Birmingham, Newcastle Oxford, UK
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15
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Kozak RP, Mondragon-Shem K, Williams C, Rose C, Perally S, Caljon G, Van Den Abbeele J, Wongtrakul-Kish K, Gardner RA, Spencer D, Lehane MJ, Acosta-Serrano Á. Tsetse salivary glycoproteins are modified with paucimannosidic N-glycans, are recognised by C-type lectins and bind to trypanosomes. PLoS Negl Trop Dis 2021; 15:e0009071. [PMID: 33529215 PMCID: PMC7880456 DOI: 10.1371/journal.pntd.0009071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 02/12/2021] [Accepted: 12/14/2020] [Indexed: 12/01/2022] Open
Abstract
African sleeping sickness is caused by Trypanosoma brucei, a parasite transmitted by the bite of a tsetse fly. Trypanosome infection induces a severe transcriptional downregulation of tsetse genes encoding for salivary proteins, which reduces its anti-hemostatic and anti-clotting properties. To better understand trypanosome transmission and the possible role of glycans in insect bloodfeeding, we characterized the N-glycome of tsetse saliva glycoproteins. Tsetse salivary N-glycans were enzymatically released, tagged with either 2-aminobenzamide (2-AB) or procainamide, and analyzed by HILIC-UHPLC-FLR coupled online with positive-ion ESI-LC-MS/MS. We found that the N-glycan profiles of T. brucei-infected and naïve tsetse salivary glycoproteins are almost identical, consisting mainly (>50%) of highly processed Man3GlcNAc2 in addition to several other paucimannose, high mannose, and few hybrid-type N-glycans. In overlay assays, these sugars were differentially recognized by the mannose receptor and DC-SIGN C-type lectins. We also show that salivary glycoproteins bind strongly to the surface of transmissible metacyclic trypanosomes. We suggest that although the repertoire of tsetse salivary N-glycans does not change during a trypanosome infection, the interactions with mannosylated glycoproteins may influence parasite transmission into the vertebrate host. In addition to helping the ingestion of a bloodmeal, the saliva of vector insects can modulate vertebrate immune responses. However, most research has focused on the salivary proteins, while the sugars (glycans) that modify them remain unexplored. Here we studied N-glycosylation, a common post-translational modification where sugar structures are attached to specific sites of a protein. Insect salivary N-glycans may affect how the saliva is recognized by the host, possibly playing a role during pathogen transmission. In this manuscript, we present the first detailed structural characterization of the salivary N-glycans in the tsetse fly Glossina morsitans, vector of African trypanosomiasis. We found that tsetse fly glycoproteins are mainly modified by simple N-glycans with short mannose modifications, which are recognised by mammalian C-type lectins (mannose receptor and DC-SIGN). Furthermore, we show that salivary glycoproteins bind to the surface of the trypanosomes that are transmitted to the vertebrate host; this opens up interesting questions as to the role of these glycoproteins in the successful establishment of infection by this parasite. Overall, our work represents a novel contribution towards the salivary N-glycome of an important insect vector, and towards the understanding of vector saliva and its complex effects in the vertebrate host.
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Affiliation(s)
| | - Karina Mondragon-Shem
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - Christopher Williams
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - Clair Rose
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - Samirah Perally
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - Guy Caljon
- Laboratory of Microbiology, Parasitology and Hygiene (LMPH), University of Antwerp, Antwerp, Belgium
| | - Jan Van Den Abbeele
- Department of Biomedical Sciences, Institute of Tropical Medicine Antwerp, Antwerp, Belgium
| | | | | | - Daniel Spencer
- Ludger Ltd., Culham Science Centre, Oxford, United Kingdom
| | - Michael J. Lehane
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - Álvaro Acosta-Serrano
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- * E-mail:
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16
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Bonnardel F, Mariethoz J, Pérez S, Imberty A, Lisacek F. LectomeXplore, an update of UniLectin for the discovery of carbohydrate-binding proteins based on a new lectin classification. Nucleic Acids Res 2021; 49:D1548-D1554. [PMID: 33174598 PMCID: PMC7778903 DOI: 10.1093/nar/gkaa1019] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/13/2020] [Accepted: 10/16/2020] [Indexed: 12/22/2022] Open
Abstract
Lectins are non-covalent glycan-binding proteins mediating cellular interactions but their annotation in newly sequenced organisms is lacking. The limited size of functional domains and the low level of sequence similarity challenge usual bioinformatics tools. The identification of lectin domains in proteomes requires the manual curation of sequence alignments based on structural folds. A new lectin classification is proposed. It is built on three levels: (i) 35 lectin domain folds, (ii) 109 classes of lectins sharing at least 20% sequence similarity and (iii) 350 families of lectins sharing at least 70% sequence similarity. This information is compiled in the UniLectin platform that includes the previously described UniLectin3D database of curated lectin 3D structures. Since its first release, UniLectin3D has been updated with 485 additional 3D structures. The database is now complemented by two additional modules: PropLec containing predicted β-propeller lectins and LectomeXplore including predicted lectins from sequences of the NBCI-nr and UniProt for every curated lectin class. UniLectin is accessible at https://www.unilectin.eu/.
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Affiliation(s)
- François Bonnardel
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
- Proteome Informatics Group, SIB Swiss Institute of Bioinformatics, CH-1227 Geneva, Switzerland
- Computer Science Department, University of Geneva, CH-1227 Geneva, Switzerland
| | - Julien Mariethoz
- Proteome Informatics Group, SIB Swiss Institute of Bioinformatics, CH-1227 Geneva, Switzerland
- Computer Science Department, University of Geneva, CH-1227 Geneva, Switzerland
- Section of Biology, University of Geneva, CH-1205 Geneva, Switzerland
| | - Serge Pérez
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
| | - Anne Imberty
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France
| | - Frédérique Lisacek
- Proteome Informatics Group, SIB Swiss Institute of Bioinformatics, CH-1227 Geneva, Switzerland
- Computer Science Department, University of Geneva, CH-1227 Geneva, Switzerland
- Section of Biology, University of Geneva, CH-1205 Geneva, Switzerland
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17
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Thielens NM, Gout E, Lacroix M, Reiser JB, Gaboriaud C. Analysis of the Ligand Recognition Specificities of Human Ficolins Using Surface Plasmon Resonance. Methods Mol Biol 2021; 2227:205-226. [PMID: 33847944 DOI: 10.1007/978-1-0716-1016-9_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ficolins are innate immune recognition proteins involved in activation of the lectin complement pathway. These oligomeric lectin-like proteins are assembled from subunits consisting of a collagen-like triple helix and a trimeric fibrinogen-like recognition domain. In humans, three ficolins coexist: they differ in their ligand binding specificities, but share the capacity to associate with proteases through their collagen-like stalks and trigger complement activation. We describe methods to decipher the recognition specificities of ficolins, based on surface plasmon resonance, an optical technique allowing real-time and label-free monitoring of biomolecular interactions. This technique was mainly used to characterize and compare binding of the three recombinant full-length ficolins and of their isolated recognition domains to various immobilized BSA-glycoconjugates, acetylated BSA or biotinylated heparin. The avidity phenomenon that enhances the apparent affinity of interactions between oligomeric lectin-like proteins and the multivalent ligands is also discussed.
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Affiliation(s)
| | - Evelyne Gout
- Univ. Grenoble Alpes, CNRS, CEA, IBS, Grenoble, France
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18
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Wang P, Wu Q, Shuai ZW. Emerging role of ficolins in autoimmune diseases. Pharmacol Res 2021; 163:105266. [PMID: 33127557 DOI: 10.1016/j.phrs.2020.105266] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/15/2020] [Accepted: 10/18/2020] [Indexed: 12/22/2022]
Abstract
Ficolins are pattern-recognition molecules (PRMs) that could form complexes with mannose-binding lectin-associated serine proteases (MASPs) to trigger complement activation via the lectin pathway, thereby mediating a series of immune responses including opsonization, phagocytosis and cytokine production. In the past few decades, accumulating evidence have suggested that ficolins play a major role in the onset and development of several autoimmune diseases (ADs), including systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), systemic sclerosis (SSc), Type 1 diabetes (T1D), inflammatory bowel disease (IBD), etc. In this review, we synthesized previous literatures and recent advances to elucidate the immunological regulations of ficolins and discuss the potential diagnostic ability of ficolins in ADs, as well as giving an insight into the future therapeutic options for ficolins in ADs.
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Affiliation(s)
- Peng Wang
- Center for Genetic Epidemiology and Genomics, School of Public Health, Soochow University Medical College, 199 Renai Road, Suzhou, Jiangsu, 215123, China.
| | - Qian Wu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230016, Anhui, China; Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, 81 Meishan Road, Hefei, 230016, Anhui, China
| | - Zong-Wen Shuai
- Department of Rheumatology and Immunology, the First Affiliated Hospital of Anhui Medical University, Hefei, China; Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, 81 Meishan Road, Hefei, 230016, Anhui, China.
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19
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Mannose-binding lectin gene polymorphisms in the East Siberia and Russian Arctic populations. Immunogenetics 2020; 72:347-354. [PMID: 32813045 DOI: 10.1007/s00251-020-01175-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/11/2020] [Indexed: 01/09/2023]
Abstract
Mannose-binding lectin (MBL) encoded by MBL2 gene is a protein with the ability to form carbohydrate complexes with microbial wall promoting their subsequent elimination. Genetically determined levels of MBL can modify the risk and clinical characteristics of many infectious diseases. The frequency of MBL2 genotypes exhibits significant population differences. The data on the distribution of MBL2 genotypes among the aborigines of the Russian Arctic territories have not yet been published. A total of 880 specimens of dried blood spots of the newborns were genotyped. The newborns represented four populations: Nenets, Dolgan-Nganasans, Mixed aboriginal population, and Russians (Caucasians, Krasnoyarsk). Six polymorphisms of the MBL2 gene were studied: rs11003125, rs7096206, rs7095891, rs5030737, rs1800450, and rs1800451. The frequency of the combined rare O allele (composed of the coding region variants rs5030737, rs1800450, and rs1800451) in the homozygous state was significantly higher in Russians: 10% vs 2% in Nenets and 1% in Dolgan-Nganosans (p < 0.001 for Russians vs other populations). The frequency of the high-producing haplotype (HYPA) was 35.4% in the Russian newborns, in keeping with European populations (27-33%); 64% for Nenets and 56% for Dolgan-Nganasans, similar to the estimates obtained for Eskimos and North Amerinds (64-81%). Our study results are in line with the hypothesis that human evolution has been moving in the direction of accumulation of the genotypes associated with low activity of the lectin complement activation pathway because of the prevalence of some intracellular infections such as tuberculosis, whereby low MBL activity may have a protective effect.
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20
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Qin N, Wu M, Tang T, Liu F. A fibrinogen-related protein (Mnfico3) acts as a novel pattern recognition receptor in Macrobrachium nipponense. FISH & SHELLFISH IMMUNOLOGY 2020; 100:272-282. [PMID: 32142875 DOI: 10.1016/j.fsi.2020.02.066] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/24/2020] [Accepted: 02/29/2020] [Indexed: 06/10/2023]
Abstract
Fibrinogen-related proteins (FREPs) are widely found in both vertebrates as well as invertebrates, and they play a crucial role in host immunity. In this study, we isolated a novel ficolin gene (Mnfico3) from the oriental river prawn Macrobrachium nipponense. The complete cDNA sequence of Mnfico3 was 1133 bp long, containing an open reading frame of 765 bp coding for Mnfico3, a protein consisting of 254 amino acids. The Mnfico3 protein contained a putative N-terminal signal peptide and a fibrinogen-related protein domain present at the C-terminal. Phylogenetic analysis indicated that Mnfico3 had a closer evolutionary relationship with vertebrate ficolins than with its invertebrate homologues. Tissue distribution analysis indicated that Mnfico3 was predominantly expressed in muscle, in which its transcription was increased following bacterial challenge by Aeromonas veronii. Function analysis using recombinant protein revealed that rMnFico3 had broad-spectrum binding capacity to a variety of microorganisms and pathogen-associated molecular pattern (PAMP) ligands. Furthermore, rMnFico3 exhibited Ca2+-dependent agglutinating activity against microbes in vitro, and ability to attach to the hemocyte surface which promoted phagocytosis and subsequent clearance of invasive bacteria in vivo. Silencing rMnFico3 in prawn through RNAi did not alter the expression of antimicrobial peptide genes (ALF and Crustin). These results manifested that MnFico3 functioned as a potential pattern recognition receptor (PPR) to mediate cellular immune response by recognizing PAMPs, agglutinating invasive microbes, and promoting phagocytosis of hemocytes.
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Affiliation(s)
- Nan Qin
- The Key Laboratory of Zoological Systematics and Application, College of Life Sciences, Hebei University, Baoding, Hebei, 071002, China
| | - Mengjia Wu
- The Key Laboratory of Zoological Systematics and Application, College of Life Sciences, Hebei University, Baoding, Hebei, 071002, China
| | - Ting Tang
- The Key Laboratory of Zoological Systematics and Application, College of Life Sciences, Hebei University, Baoding, Hebei, 071002, China.
| | - Fengsong Liu
- The Key Laboratory of Zoological Systematics and Application, College of Life Sciences, Hebei University, Baoding, Hebei, 071002, China.
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21
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Elkoumi MA, Abdellatif SH, Mohamed FY, Sherif AH, Elashkar SSA, Saleh RM, Boraey NF, Abdelaal NM, Akeel NE, Elhewala AA, Mosbah AA, Zakaria MT, Soliman MM, Salah A, Sedky YM, Sobieh AA, Mashali MH, Waked NM, Elshreif AM, Hafez SF, Hashem MIA, Shehab MM, Soliman AA, Emam AA, Ahmed AAA, Fahim MS, Elshehawy NA, Abdel-Aziz MM, Abdou AM, El-Shehawy AA, Youssef MAA, Fahmy DS, Malek MM, Osman SF, Ibrahim MAM, Alanwar MI, Zeidan NMS. Ficolin-1 gene (FCN1) -144 C/A polymorphism is associated with adverse outcome of severe pneumonia in the under-five Egyptian children: A multicenter study. Pediatr Pulmonol 2020; 55:1175-1183. [PMID: 32142211 DOI: 10.1002/ppul.24719] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 02/22/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Pneumonia is the foremost cause of child death worldwide. M-ficolin is encoded by the FCN1 gene and represents a novel link between innate and adaptive immunity. OBJECTIVES To investigate the FCN1 -144 C/A (rs10117466) polymorphism as a potential marker for pneumonia severity and adverse outcome namely complications or mortality in the under-five Egyptian children. METHODS This was a prospective multicenter study that included 620 children hospitalized with World Health Organization-defined severe pneumonia and 620 matched healthy control children. Polymorphism rs10117466 of the FCN1 gene promoter was analyzed by PCR-SSP, while serum M-ficolin levels were assessed by ELISA. RESULTS The FCN1 A/A genotype and A allele at the -144 position were more frequently observed in patients compared to the control children (43.4% vs 27.6%; odds ratio [OR]: 1.62; [95% confidence interval {CI}: 1.18-2.2]; for the A/A genotype) and (60.8% vs 52.5%; OR: 1.4; [95% CI: 1.19-1.65]; for the A allele); P < .01. The FCN1 -144 A/A homozygous patients had significantly higher serum M-ficolin concentrations (mean: 1844 ± 396 ng/mL) compared with those carrying the C/C or C/A genotype (mean: 857 ± 278 and 1073 ± 323 ng/mL, respectively; P = .002). FCN1 -144 A/A genotype was an independent risk factor for adverse outcomes in children with severe pneumonia (adjusted OR = 4.85, [95% CI: 2.96-10.25]; P = .01). CONCLUSION The FCN1 A/A genotype at the -144 position was associated with high M-ficolin serum levels and possibly contributes to enhanced inflammatory response resulting in the adverse outcome of pneumonia in the under-five Egyptian children.
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Affiliation(s)
- Mohamed A Elkoumi
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Sawsan H Abdellatif
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Faisal Y Mohamed
- Department of Pediatrics, Faculty of Medicine, Ain-Shams University, Cairo, Egypt
| | - Ahmed H Sherif
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Shaimaa S A Elashkar
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Rabab M Saleh
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Naglaa F Boraey
- Department of Pediatrics, Faculty of Medicine, Sohag University, Sohag, Egypt
| | - NourEldin M Abdelaal
- Department of Pediatrics, Faculty of Medicine, Ain-Shams University, Cairo, Egypt
| | - Nagwa E Akeel
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ahmed A Elhewala
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Amira A Mosbah
- Department of Pediatrics, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Mervat T Zakaria
- Department of Pediatrics, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Mohammed M Soliman
- Department of Pediatrics, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Ahmed Salah
- Department of Pediatrics, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Yasser M Sedky
- Department of Pediatrics, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Alaa A Sobieh
- Department of Pediatrics, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Mohamed H Mashali
- Department of Pediatrics, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Nevin M Waked
- Department of Pediatrics, Faculty of Medicine, October 6 University, Cairo, Egypt
| | - Anas M Elshreif
- Department of Pediatrics, Faculty of Medicine, Al Azhar University, Cairo, Egypt
| | - Sahbaa F Hafez
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mustafa I A Hashem
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mohamed M Shehab
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Attia A Soliman
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Ahmed A Emam
- Department of Pediatrics, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | | | - Mohamed S Fahim
- Department of Anathesia, Faculty of Medicine, Ain-Shams University, Cairo, Egypt
| | - Naglaa A Elshehawy
- Department of Anathesia, Faculty of Medicine, Al Azhar University, Cairo, Egypt
| | - Marwa M Abdel-Aziz
- Department of Anathesia, Faculty of Medicine, Al Azhar University, Cairo, Egypt
| | - Adel M Abdou
- Department of Clinical pathology, Faculty of Medicine, Al Azhar University, Cairo, Egypt
| | - Ahmed A El-Shehawy
- Department of Physical Therapy for Cardiovascular/Respiratory Disorder, Faculty of Physical Therapy, Cairo University, Giza, Egypt
| | - Manal A A Youssef
- Department of Rheumatology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Dalia S Fahmy
- Department of Rheumatology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Mai M Malek
- Department of Microbiology and Immunology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Sherif F Osman
- Department of Radiology, Texas Tech University Health Sciences Center El Paso, El Paso, Texas
| | - Mohamed A M Ibrahim
- Department of Clinical pathology, Faculty of Medicine, Sohag University, Egypt
| | - Mohamed I Alanwar
- Department of Cardiothoracic surgery, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | - Nancy M S Zeidan
- Department of Pediatrics, Faculty of Medicine, Cairo University, Giza, Egypt
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22
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Ramírez-Toloza G, Sosoniuk-Roche E, Valck C, Aguilar-Guzmán L, Ferreira VP, Ferreira A. Trypanosoma cruzi Calreticulin: Immune Evasion, Infectivity, and Tumorigenesis. Trends Parasitol 2020; 36:368-381. [PMID: 32191851 DOI: 10.1016/j.pt.2020.01.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 01/25/2020] [Accepted: 01/26/2020] [Indexed: 02/06/2023]
Abstract
To successfully infect, Trypanosoma cruzi evades and modulates the host immune response. T. cruzi calreticulin (TcCalr) is a multifunctional, endoplasmic reticulum (ER)-resident chaperone that, translocated to the external microenvironment, mediates crucial host-parasite interactions. TcCalr binds and inactivates C1 and mannose-binding lectin (MBL)/ficolins, important pattern- recognition receptors (PRRs) of the complement system. Using an apoptotic mimicry strategy, the C1-TcCalr association facilitates the infection of target cells. T. cruzi infection also seems to confer protection against tumorigenesis. Thus, recombinant TcCalr has important antiangiogenic properties, detected in vitro, ex vivo, and in ovum, most likely contributing at least in part, to its antitumor properties. Consequently, TcCalr is useful for investigating key issues of host-parasite interactions and possible new immunological/pharmacological interventions in the areas of Chagas' disease and experimental cancer.
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Affiliation(s)
- Galia Ramírez-Toloza
- Faculty of Veterinary Medicine and Livestock Sciences, University of Chile, Santiago, Chile.
| | | | - Carolina Valck
- Department of Immunology, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Lorena Aguilar-Guzmán
- Faculty of Veterinary Medicine and Livestock Sciences, University of Chile, Santiago, Chile
| | - Viviana P Ferreira
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, OH, USA
| | - Arturo Ferreira
- Department of Immunology, Faculty of Medicine, University of Chile, Santiago, Chile.
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Alghadban S, Kenawy HI, Dudler T, Schwaeble WJ, Brunskill NJ. Absence of the Lectin Activation Pathway of Complement Ameliorates Proteinuria-Induced Renal Injury. Front Immunol 2019; 10:2238. [PMID: 31608060 PMCID: PMC6768126 DOI: 10.3389/fimmu.2019.02238] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 09/04/2019] [Indexed: 12/15/2022] Open
Abstract
Proteinuria is an adverse prognostic feature in renal diseases. In proteinuric nephropathies, filtered proteins exert an injurious effect on the renal tubulointerstitium, resulting in inflammation and fibrosis. In the present study, we assessed to what extent complement activation via the lectin pathway may contribute to renal injury in response to proteinuria-related stress in proximal tubular cells. We used the well-established mouse model of protein overload proteinuria (POP) to assess the effect of lectin pathway inhibition on renal injury and fibrotic changes characteristic of proteinuric nephropathy. To this end, we compared experimental outcomes in wild type mice with MASP-2-deficient mice or wild type mice treated with MASP-2 inhibitor to block lectin pathway functional activity. Multiple markers of renal injury were assessed including renal function, proteinuria, macrophage infiltration, and cytokine release profiles. Both MASP-2-deficient and MASP-2 inhibitor-treated wild type mice exhibited renoprotection from proteinuria with significantly less tubulointerstitial injury when compared to isotype control antibody treated mice. This indicates that therapeutic targeting of MASP-2 in proteinuric nephropathies may offer a useful strategy in the clinical management of proteinuria associated pathologies in a variety of different underlying renal diseases.
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Affiliation(s)
- Samy Alghadban
- Department of Infection, Immunity and Inflammation, College of Life Sciences, University of Leicester, Leicester, United Kingdom.,Zoology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
| | - Hany I Kenawy
- Department of Infection, Immunity and Inflammation, College of Life Sciences, University of Leicester, Leicester, United Kingdom.,Microbiology and Immunology Department, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | | | - Wilhelm J Schwaeble
- Department of Infection, Immunity and Inflammation, College of Life Sciences, University of Leicester, Leicester, United Kingdom.,Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Nigel J Brunskill
- Department of Infection, Immunity and Inflammation, College of Life Sciences, University of Leicester, Leicester, United Kingdom.,Department of Nephrology, Leicester General Hospital, Leicester, United Kingdom
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24
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Ficolin-3 Deficiency Is Associated with Disease and an Increased Risk of Systemic Lupus Erythematosus. J Clin Immunol 2019; 39:421-429. [DOI: 10.1007/s10875-019-00627-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 04/07/2019] [Indexed: 01/06/2023]
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25
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Katayama M, Ota K, Nagi-Miura N, Ohno N, Yabuta N, Nojima H, Kumanogoh A, Hirano T. Ficolin-1 is a promising therapeutic target for autoimmune diseases. Int Immunol 2019; 31:23-32. [PMID: 30169661 PMCID: PMC6364620 DOI: 10.1093/intimm/dxy056] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 08/27/2018] [Indexed: 01/29/2023] Open
Abstract
Previously, we reported that mRNA expression of ficolin-1 (FCN1), a component of the complement lectin pathway, is elevated in peripheral blood mononuclear cells of patients with vasculitis syndrome, and that FCN1-positive cells infiltrate into inflamed regions in patient specimens. In addition, we reported that the serum FCN1 concentration is elevated in patients with Kawasaki disease (KD), a pediatric vasculitis, but dramatically decreases after intravenous immunoglobulin (IVIG) treatment. Furthermore, we showed that FCN1 binds to IgG1 in a pull-down assay. These results suggested that removal of FCN1 may be a therapeutic mechanism of IVIG. In this study, we prepared anti-FCN1 monoclonal antibody (mAb) and examined its therapeutic potential in mice treated with Candida albicans water-soluble fraction (CAWS), which induces KD-like vasculitis in the coronary artery. Indeed, treatment with anti-FCN1 mAb decreased the histological score of vasculitis (P = 0.03). To investigate the role of FCN1, we assessed blood samples of patients with various autoimmune diseases and demonstrated that serum levels of FCN1 were elevated not only in patients with vasculitis, but also in those with rheumatoid arthritis. Additionally, FCN1-targeted treatment of a mouse model of arthritis [collagen antibody-induced arthritis (CAIA)] revealed that administration of anti-FCN1 mAb ameliorated symptoms of arthritis (P < 0.01). These results suggest that FCN1 is involved in the pathogenesis of autoimmune diseases, and that targeting FCN1 represents a promising strategy for treating these diseases.
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Affiliation(s)
- Michihito Katayama
- Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Yamadaoka, Suita, Osaka, Japan
| | - Kaori Ota
- Department of Molecular Genetics, Research Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan
| | - Noriko Nagi-Miura
- Center for the Advancement of Pharmaceutical Education, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
| | - Naohito Ohno
- Laboratory for Immunopharmacology of Microbial Products, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
| | - Norikazu Yabuta
- Department of Molecular Genetics, Research Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan
| | - Hiroshi Nojima
- Department of Molecular Genetics, Research Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan
| | - Atsushi Kumanogoh
- Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Yamadaoka, Suita, Osaka, Japan
| | - Toru Hirano
- Department of Respiratory Medicine and Clinical Immunology, Graduate School of Medicine, Osaka University, Yamadaoka, Suita, Osaka, Japan
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26
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Bidula S, Sexton DW, Schelenz S. Ficolins and the Recognition of Pathogenic Microorganisms: An Overview of the Innate Immune Response and Contribution of Single Nucleotide Polymorphisms. J Immunol Res 2019; 2019:3205072. [PMID: 30868077 PMCID: PMC6379837 DOI: 10.1155/2019/3205072] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 11/29/2018] [Accepted: 12/24/2018] [Indexed: 12/19/2022] Open
Abstract
Ficolins are innate pattern recognition receptors (PRR) and play integral roles within the innate immune response to numerous pathogens throughout the circulation, as well as within organs. Pathogens are primarily removed by direct opsonisation following the recognition of cell surface carbohydrates and other immunostimulatory molecules or via the activation of the lectin complement pathway, which results in the deposition of C3b and the recruitment of phagocytes. In recent years, there have been a number of studies implicating ficolins in the recognition and removal of numerous bacterial, viral, fungal, and parasitic pathogens. Moreover, there has been expanding evidence highlighting that mutations within these key immune proteins, or the possession of particular haplotypes, enhance susceptibility to colonization by pathogens and dysfunctional immune responses. This review will therefore encompass previous knowledge on the role of ficolins in the recognition of bacterial and viral pathogens, while acknowledging the recent advances in the immune response to fungal and parasitic infections. Additionally, we will explore the various genetic susceptibility factors that predispose individuals to infection.
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Affiliation(s)
- Stefan Bidula
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Darren W. Sexton
- School of Pharmacy and Biomolecular Science, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK
| | - Silke Schelenz
- Department of Microbiology, Royal Brompton Hospital, Sydney Street, London SW3 6NP, UK
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27
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Involvement of Surfactant Protein D in Ebola Virus Infection Enhancement via Glycoprotein Interaction. Viruses 2018; 11:v11010015. [PMID: 30587835 PMCID: PMC6356362 DOI: 10.3390/v11010015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 12/20/2018] [Accepted: 12/22/2018] [Indexed: 01/05/2023] Open
Abstract
Since the largest 2014⁻2016 Ebola virus disease outbreak in West Africa, understanding of Ebola virus infection has improved, notably the involvement of innate immune mediators. Amongst them, collectins are important players in the antiviral innate immune defense. A screening of Ebola glycoprotein (GP)-collectins interactions revealed the specific interaction of human surfactant protein D (hSP-D), a lectin expressed in lung and liver, two compartments where Ebola was found in vivo. Further analyses have demonstrated an involvement of hSP-D in the enhancement of virus infection in several in vitro models. Similar effects were observed for porcine SP-D (pSP-D). In addition, both hSP-D and pSP-D interacted with Reston virus (RESTV) GP and enhanced pseudoviral infection in pulmonary cells. Thus, our study reveals a novel partner of Ebola GP that may participate to enhance viral spread.
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28
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Paréj K, Kocsis A, Enyingi C, Dani R, Oroszlán G, Beinrohr L, Dobó J, Závodszky P, Pál G, Gál P. Cutting Edge: A New Player in the Alternative Complement Pathway, MASP-1 Is Essential for LPS-Induced, but Not for Zymosan-Induced, Alternative Pathway Activation. THE JOURNAL OF IMMUNOLOGY 2018; 200:2247-2252. [PMID: 29475986 DOI: 10.4049/jimmunol.1701421] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 02/06/2018] [Indexed: 02/02/2023]
Abstract
The complement system is a sophisticated network of proteases. In this article, we describe an unexpected link between two linear activation routes of the complement system: the lectin pathway (LP) and the alternative pathway (AP). Mannose-lectin binding-associated serine protease (MASP)-1 is known to be the initiator protease of the LP. Using a specific and potent inhibitor of MASP-1, SGMI-1, as well as other MASP-1 inhibitors with different mechanisms of action, we demonstrated that, in addition to its functions in the LP, MASP-1 is essential for bacterial LPS-induced AP activation, whereas it has little effect on zymosan-induced AP activation. We have shown that MASP-1 inhibition prevents AP activation, as well as attenuates the already initiated AP activity on the LPS surface. This newly recognized function of MASP-1 can be important for the defense against certain bacterial infections. Our results also emphasize that the mechanism of AP activation depends on the activator surface.
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Affiliation(s)
- Katalin Paréj
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; and
| | - Andrea Kocsis
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; and
| | - Csenge Enyingi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; and
| | - Ráhel Dani
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; and
| | - Gábor Oroszlán
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; and
| | - László Beinrohr
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; and
| | - József Dobó
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; and
| | - Péter Závodszky
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; and
| | - Gábor Pál
- Department of Biochemistry, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Péter Gál
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1117 Budapest, Hungary; and
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29
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Bertuzzi M, Hayes GE, Icheoku UJ, van Rhijn N, Denning DW, Osherov N, Bignell EM. Anti-Aspergillus Activities of the Respiratory Epithelium in Health and Disease. J Fungi (Basel) 2018; 4:E8. [PMID: 29371501 PMCID: PMC5872311 DOI: 10.3390/jof4010008] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/03/2018] [Accepted: 01/05/2018] [Indexed: 02/06/2023] Open
Abstract
Respiratory epithelia fulfil multiple roles beyond that of gaseous exchange, also acting as primary custodians of lung sterility and inflammatory homeostasis. Inhaled fungal spores pose a continual antigenic, and potentially pathogenic, challenge to lung integrity against which the human respiratory mucosa has developed various tolerance and defence strategies. However, respiratory disease and immune dysfunction frequently render the human lung susceptible to fungal diseases, the most common of which are the aspergilloses, a group of syndromes caused by inhaled spores of Aspergillus fumigatus. Inhaled Aspergillus spores enter into a multiplicity of interactions with respiratory epithelia, the mechanistic bases of which are only just becoming recognized as important drivers of disease, as well as possible therapeutic targets. In this mini-review we examine current understanding of Aspergillus-epithelial interactions and, based upon the very latest developments in the field, we explore two apparently opposing schools of thought which view epithelial uptake of Aspergillus spores as either a curative or disease-exacerbating event.
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Affiliation(s)
- Margherita Bertuzzi
- Manchester Fungal Infection Group, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9NT, UK.
| | - Gemma E Hayes
- Northern Devon Healthcare NHS Trust, North Devon District Hospital, Raleigh Park, Barnstaple EX31 4JB, UK.
| | - Uju J Icheoku
- Manchester Fungal Infection Group, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9NT, UK.
| | - Norman van Rhijn
- Manchester Fungal Infection Group, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9NT, UK.
| | - David W Denning
- The National Aspergillosis Centre, Education and Research Centre, Wythenshawe Hospital, Manchester University NHS Foundation Trust, Manchester M23 9LT, UK.
| | - Nir Osherov
- Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
| | - Elaine M Bignell
- Manchester Fungal Infection Group, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9NT, UK.
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30
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Howard M, Farrar CA, Sacks SH. Structural and functional diversity of collectins and ficolins and their relationship to disease. Semin Immunopathol 2018; 40:75-85. [PMID: 28894916 PMCID: PMC5794833 DOI: 10.1007/s00281-017-0642-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 08/03/2017] [Indexed: 12/13/2022]
Abstract
Pattern recognition molecules are sensors for the innate immune system and trigger a number of pathophysiological functions after interaction with the corresponding ligands on microorganisms or altered mammalian cells. Of those pattern recognition molecules used by the complement system, collagen-like lectins (collectins) are an important subcomponent. Whereas the best known of these collectins, mannose-binding lectin, largely occurs as a circulating protein following production by hepatocytes, the most recently described collectins exhibit strong local biosynthesis. This local production and release of soluble collectin molecules appear to serve local tissue functions at extravascular sites, including a developmental function. In this article, we focus on the characteristics of collectin-11 (CL-11 or CL-K1), whose ubiquitous expression and multiple activities likely reflect a wide biological relevance. Collectin-11 appears to behave as an acute phase protein whose production associated with metabolic and physical stress results in locally targeted inflammation and tissue cell death. Early results indicate the importance of fucosylated ligand marking the injured cells targeted by collectin-11, and we suggest that further characterisation of this and related ligands will lead to better understanding of pathophysiological significance and exploitation for clinical benefit.
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Affiliation(s)
- Mark Howard
- MRC Centre for Transplantation, King's College London, Guy's Hospital, 5th Floor Tower Wing, Great Maze Pond, London, SE1 9RT, UK
| | - Conrad A Farrar
- MRC Centre for Transplantation, King's College London, Guy's Hospital, 5th Floor Tower Wing, Great Maze Pond, London, SE1 9RT, UK
| | - Steven H Sacks
- MRC Centre for Transplantation, King's College London, Guy's Hospital, 5th Floor Tower Wing, Great Maze Pond, London, SE1 9RT, UK.
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31
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Lacroix M, Tessier A, Dumestre-Pérard C, Vadon-Le Goff S, Gout E, Bruckner-Tuderman L, Kiritsi D, Nyström A, Ricard-Blum S, Moali C, Hulmes DJS, Thielens NM. Interaction of Complement Defence Collagens C1q and Mannose-Binding Lectin with BMP-1/Tolloid-like Proteinases. Sci Rep 2017; 7:16958. [PMID: 29209066 PMCID: PMC5717261 DOI: 10.1038/s41598-017-17318-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/19/2017] [Indexed: 12/26/2022] Open
Abstract
The defence collagens C1q and mannose-binding lectin (MBL) are immune recognition proteins that associate with the serine proteinases C1r/C1s and MBL-associated serine proteases (MASPs) to trigger activation of complement, a major innate immune system. Bone morphogenetic protein-1 (BMP-1)/tolloid-like proteinases (BTPs) are metalloproteinases with major roles in extracellular matrix assembly and growth factor signalling. Despite their different functions, C1r/C1s/MASPs and BTPs share structural similarities, including a specific CUB-EGF-CUB domain arrangement found only in these enzymes that mediates interactions with collagen-like proteins, suggesting a possible functional relationship. Here we investigated the potential interactions between the defence collagens C1q and MBL and the BTPs BMP-1 and mammalian tolloid-like-1 (mTLL-1). C1q and MBL bound to immobilized BMP-1 and mTLL-1 with nanomolar affinities. These interactions involved the collagen-like regions of the defence collagens and were inhibited by pre-incubation of C1q or MBL with their cognate complement proteinases. Soluble BMP-1 and mTLL-1 did not inhibit complement activation and the defence collagens were neither substrates nor inhibitors of BMP-1. Finally, C1q co-localized with BMP-1 in skin biopsies following melanoma excision and from patients with recessive dystrophic epidermolysis bullosa. The observed interactions provide support for a functional link between complement and BTPs during inflammation and tissue repair.
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Affiliation(s)
- Monique Lacroix
- Univ. Grenoble Alpes, CNRS, CEA, IBS, F-38000, Grenoble, France
| | - Agnès Tessier
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, Tissue Biology and Therapeutic Engineering Unit, LBTI, UMR 5305, F-69367, Lyon, France
| | - Chantal Dumestre-Pérard
- Laboratoire d'Immunologie, Pôle de Biologie, CHU Grenoble Alpes, 38700, La Tronche, France.,BNI group, TIMC-IMAG UMR5525 Université Grenoble Alpes, 38706, La Tronche, France
| | - Sandrine Vadon-Le Goff
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, Tissue Biology and Therapeutic Engineering Unit, LBTI, UMR 5305, F-69367, Lyon, France
| | - Evelyne Gout
- Univ. Grenoble Alpes, CNRS, CEA, IBS, F-38000, Grenoble, France
| | - Leena Bruckner-Tuderman
- Department of Dermatology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Dimitra Kiritsi
- Department of Dermatology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Alexander Nyström
- Department of Dermatology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sylvie Ricard-Blum
- Univ. Lyon, University Claude Bernard Lyon 1, INSA Lyon, CPE, Institute of Molecular and Supramolecular Chemistry and Biochemistry (ICBMS), UMR 5246, F-69622, Villeurbanne, France
| | - Catherine Moali
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, Tissue Biology and Therapeutic Engineering Unit, LBTI, UMR 5305, F-69367, Lyon, France
| | - David J S Hulmes
- Univ. Lyon, Université Claude Bernard Lyon 1, CNRS, Tissue Biology and Therapeutic Engineering Unit, LBTI, UMR 5305, F-69367, Lyon, France.
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Jensen K, Lund KP, Christensen KB, Holm AT, Dubey LK, Moeller JB, Jepsen CS, Schlosser A, Galgóczy L, Thiel S, Holmskov U, Sorensen GL. M-ficolin is present in Aspergillus fumigatus infected lung and modulates epithelial cell immune responses elicited by fungal cell wall polysaccharides. Virulence 2017; 8:1870-1879. [PMID: 28060571 PMCID: PMC5810506 DOI: 10.1080/21505594.2016.1278337] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 12/28/2016] [Accepted: 12/28/2016] [Indexed: 10/20/2022] Open
Affiliation(s)
- Kasper Jensen
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Kit P. Lund
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Kimmie B. Christensen
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Anne T. Holm
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Lalit Kumar Dubey
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
- Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Jesper B. Moeller
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
- Jill Roberts Institute for Research in Inflammatory Bowel Disease, Weill Cornell Medicine, Cornell University, New York, NY, USA
| | - Christine S. Jepsen
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Anders Schlosser
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - László Galgóczy
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
- Division of Molecular Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Steffen Thiel
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Uffe Holmskov
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
| | - Grith L. Sorensen
- Department of Cancer and Inflammation Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark
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33
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Ramírez-Toloza G, Ferreira A. Trypanosoma cruzi Evades the Complement System as an Efficient Strategy to Survive in the Mammalian Host: The Specific Roles of Host/Parasite Molecules and Trypanosoma cruzi Calreticulin. Front Microbiol 2017; 8:1667. [PMID: 28919885 PMCID: PMC5585158 DOI: 10.3389/fmicb.2017.01667] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 08/17/2017] [Indexed: 12/20/2022] Open
Abstract
American Trypanosomiasis is an important neglected reemerging tropical parasitism, infecting about 8 million people worldwide. Its agent, Trypanosoma cruzi, exhibits multiple mechanisms to evade the host immune response and infect host cells. An important immune evasion strategy of T. cruzi infective stages is its capacity to inhibit the complement system activation on the parasite surface, avoiding opsonizing, immune stimulating and lytic effects. Epimastigotes, the non-infective form of the parasite, present in triatomine arthropod vectors, are highly susceptible to complement-mediated lysis while trypomastigotes, the infective form, present in host bloodstream, are resistant. Thus T. cruzi susceptibility to complement varies depending on the parasite stage (amastigote, trypomastigotes or epimastigote) and on the T. cruzi strain. To avoid complement-mediated lysis, T. cruzi trypomastigotes express on the parasite surface a variety of complement regulatory proteins, such as glycoprotein 58/68 (gp58/68), T. cruzi complement regulatory protein (TcCRP), trypomastigote decay-accelerating factor (T-DAF), C2 receptor inhibitor trispanning (CRIT) and T. cruzi calreticulin (TcCRT). Alternatively, or concomitantly, the parasite captures components with complement regulatory activity from the host bloodstream, such as factor H (FH) and plasma membrane-derived vesicles (PMVs). All these proteins inhibit different steps of the classical (CP), alternative (AP) or lectin pathways (LP). Thus, TcCRP inhibits the CP C3 convertase assembling, gp58/68 inhibits the AP C3 convertase, T-DAF interferes with the CP and AP convertases assembling, TcCRT inhibits the CP and LP, CRIT confers ability to resist the CP and LP, FH is used by trypomastigotes to inhibit the AP convertases and PMVs inhibit the CP and LP C3 convertases. Many of these proteins have similar molecular inhibitory mechanisms. Our laboratory has contributed to elucidate the role of TcCRT in the host-parasite interplay. Thus, we have proposed that TcCRT is a pleiotropic molecule, present not only in the parasite endoplasmic reticulum, but also on the trypomastigote surface, participating in key processes to establish T. cruzi infection, such as inhibition of the complement system and serving as an important virulence factor. Additionally, TcCRT interaction with key complement components, participates as an anti-angiogenic and anti-tumor molecule, inhibiting at least in important part, tumor growth in infected animals.
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Affiliation(s)
- Galia Ramírez-Toloza
- Laboratory of Parasitology, Department of Animal Preventive Medicine, Faculty of Veterinary Medicine and Livestock Sciences, University of ChileSantiago, Chile
| | - Arturo Ferreira
- Program of Immunology, Institute of Biomedical Sciences, Faculty of Medicine, University of ChileSantiago, Chile
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34
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Recognition of microbial glycans by soluble human lectins. Curr Opin Struct Biol 2017; 44:168-178. [PMID: 28482337 DOI: 10.1016/j.sbi.2017.04.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 03/31/2017] [Accepted: 04/05/2017] [Indexed: 01/28/2023]
Abstract
Human innate immune lectins that recognize microbial glycans can conduct microbial surveillance and thereby help prevent infection. Structural analysis of soluble lectins has provided invaluable insight into how these proteins recognize their cognate carbohydrate ligands and how this recognition gives rise to biological function. In this opinion, we cover the structural features of lectins that allow them to mediate microbial recognition, highlighting examples from the collectin, Reg protein, galectin, pentraxin, ficolin and intelectin families. These analyses reveal how some lectins (e.g., human intelectin-1) can recognize glycan epitopes that are remarkably diverse, yet still differentiate between mammalian and microbial glycans. We additionally discuss strategies to identify lectins that recognize microbial glycans and highlight tools that facilitate these discovery efforts.
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35
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Lidani KCF, Bavia L, Ambrosio AR, de Messias-Reason IJ. The Complement System: A Prey of Trypanosoma cruzi. Front Microbiol 2017; 8:607. [PMID: 28473804 PMCID: PMC5397499 DOI: 10.3389/fmicb.2017.00607] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 03/24/2017] [Indexed: 12/27/2022] Open
Abstract
Trypanosoma cruzi is a protozoan parasite known to cause Chagas disease (CD), a neglected sickness that affects around 6-8 million people worldwide. Originally, CD was mainly found in Latin America but more recently, it has been spread to countries in North America, Asia, and Europe due the international migration from endemic areas. Thus, at present CD represents an important concern of global public health. Most of individuals that are infected by T. cruzi may remain in asymptomatic form all lifelong, but up to 40% of them will develop cardiomyopathy, digestive mega syndromes, or both. The interaction between the T. cruzi infective forms and host-related immune factors represents a key point for a better understanding of the physiopathology of CD. In this context, the complement, as one of the first line of host defense against infection was shown to play an important role in recognizing T. cruzi metacyclic trypomastigotes and in controlling parasite invasion. The complement consists of at least 35 or more plasma proteins and cell surface receptors/regulators, which can be activated by three pathways: classical (CP), lectin (LP), and alternative (AP). The CP and LP are mainly initiated by immune complexes or pathogen-associated molecular patterns (PAMPs), respectively, whereas AP is spontaneously activated by hydrolysis of C3. Once activated, several relevant complement functions are generated which include opsonization and phagocytosis of particles or microorganisms and cell lysis. An important step during T. cruzi infection is when intracellular trypomastigotes are release to bloodstream where they may be target by complement. Nevertheless, the parasite uses a sequence of events in order to escape from complement-mediated lysis. In fact, several T. cruzi molecules are known to interfere in the initiation of all three pathways and in the assembly of C3 convertase, a key step in the activation of complement. Moreover, T. cruzi promotes secretion of plasma membrane-derived vesicles from host cells, which prevent the activity of C3 convertase C4b2a and thereby may hinder complement. In this review, we aim to present an overview on the strategies used by T. cruzi in order to circumvent the activation of complement and, consequently, its biological effects.
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Affiliation(s)
| | | | | | - Iara J. de Messias-Reason
- Laboratory of Molecular Immunopathology, Clinical Hospital, Federal University of ParanáCuritiba, Brazil
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Nicola F, Loriano B. Morula cells as key hemocytes of the lectin pathway of complement activation in the colonial tunicate Botryllus schlosseri. FISH & SHELLFISH IMMUNOLOGY 2017; 63:157-164. [PMID: 28189764 DOI: 10.1016/j.fsi.2017.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 02/02/2017] [Accepted: 02/05/2017] [Indexed: 06/06/2023]
Abstract
The complement system is deeply rooted in the evolution of humoral mechanism of innate immunity. In addition to the alternative pathway of complement activation, lectins and associated serine proteases exert important roles in the recognition of non-self and activation of the effectors. In the colonial tunicate Botryllus schlosseri, we identified, characterized and studied the expression of three orthologues of genes involved in the lectin pathway of complement activation of vertebrates, i.e., genes for a mannose-binding lectin (MBL), a ficolin and a mannose-associated serine protease 1 (MASP1). All the genes are transcribed by hemocytes, and specifically by morula cells, the same immunocytes responsible for the transcription of C3 and Bf orthologues. The transcription levels of MASP1 and ficolin orthologues are not affected by zymosan challenge, indicating a constitutive expression of complement system associated serine proteases, whereas the MBL orthologue is up-regulated after 15 min of zymosan exposure. Collectively, our data suggest the presence of a complete lectin activation pathway in Botryllus.
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Affiliation(s)
- Franchi Nicola
- Department of Biology, University of Padova, Via Ugo Bassi 58/B, 35100, Padova, Italy.
| | - Ballarin Loriano
- Department of Biology, University of Padova, Via Ugo Bassi 58/B, 35100, Padova, Italy
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Davey RA, Shtanko O, Anantpadma M, Sakurai Y, Chandran K, Maury W. Mechanisms of Filovirus Entry. Curr Top Microbiol Immunol 2017; 411:323-352. [PMID: 28601947 DOI: 10.1007/82_2017_14] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Filovirus entry into cells is complex, perhaps as complex as any viral entry mechanism identified to date. However, over the past 10 years, the important events required for filoviruses to enter into the endosomal compartment and fuse with vesicular membranes have been elucidated (Fig. 1). Here, we highlight the important steps that are required for productive entry of filoviruses into mammalian cells.
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Affiliation(s)
- R A Davey
- Department of Virology and Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - O Shtanko
- Department of Virology and Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - M Anantpadma
- Department of Virology and Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - Y Sakurai
- Department of Virology and Immunology, Texas Biomedical Research Institute, San Antonio, TX, USA
| | - K Chandran
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - W Maury
- Department of Microbiology, The University of Iowa, Iowa City, IA, USA.
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Abstract
Simple and complex carbohydrates (glycans) have long been known to play major metabolic, structural and physical roles in biological systems. Targeted microbial binding to host glycans has also been studied for decades. But such biological roles can only explain some of the remarkable complexity and organismal diversity of glycans in nature. Reviewing the subject about two decades ago, one could find very few clear-cut instances of glycan-recognition-specific biological roles of glycans that were of intrinsic value to the organism expressing them. In striking contrast there is now a profusion of examples, such that this updated review cannot be comprehensive. Instead, a historical overview is presented, broad principles outlined and a few examples cited, representing diverse types of roles, mediated by various glycan classes, in different evolutionary lineages. What remains unchanged is the fact that while all theories regarding biological roles of glycans are supported by compelling evidence, exceptions to each can be found. In retrospect, this is not surprising. Complex and diverse glycans appear to be ubiquitous to all cells in nature, and essential to all life forms. Thus, >3 billion years of evolution consistently generated organisms that use these molecules for many key biological roles, even while sometimes coopting them for minor functions. In this respect, glycans are no different from other major macromolecular building blocks of life (nucleic acids, proteins and lipids), simply more rapidly evolving and complex. It is time for the diverse functional roles of glycans to be fully incorporated into the mainstream of biological sciences.
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Affiliation(s)
- Ajit Varki
- Departments of Medicine and Cellular & Molecular Medicine, Glycobiology Research and Training Center, University of California at San Diego, La Jolla, CA 92093-0687, USA
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Garred P, Genster N, Pilely K, Bayarri-Olmos R, Rosbjerg A, Ma YJ, Skjoedt MO. A journey through the lectin pathway of complement-MBL and beyond. Immunol Rev 2016; 274:74-97. [PMID: 27782323 DOI: 10.1111/imr.12468] [Citation(s) in RCA: 288] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Mannose-binding lectin (MBL), collectin-10, collectin-11, and the ficolins (ficolin-1, ficolin-2, and ficolin-3) are soluble pattern recognition molecules in the lectin complement pathway. These proteins act as mediators of host defense and participate in maintenance of tissue homeostasis. They bind to conserved pathogen-specific structures and altered self-antigens and form complexes with the pentraxins to modulate innate immune functions. All molecules exhibit distinct expression in different tissue compartments, but all are found to a varying degree in the circulation. A common feature of these molecules is their ability to interact with a set of serine proteases named MASPs (MASP-1, MASP-2, and MASP-3). MASP-1 and -2 trigger the activation of the lectin pathway and MASP-3 may be involved in the activation of the alternative pathway of complement. Furthermore, MASPs mediate processes related to coagulation, bradykinin release, and endothelial and platelet activation. Variant alleles affecting expression and structure of the proteins have been associated with a variety of infectious and non-infectious diseases, most commonly as disease modifiers. Notably, the severe 3MC (Malpuech, Michels, Mingarelli, and Carnevale) embryonic development syndrome originates from rare mutations affecting either collectin-11 or MASP-3, indicating a broader functionality of the complement system than previously anticipated. This review summarizes the characteristics of the molecules in the lectin pathway.
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Affiliation(s)
- Peter Garred
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Ninette Genster
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Katrine Pilely
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Rafael Bayarri-Olmos
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anne Rosbjerg
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ying Jie Ma
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mikkel-Ole Skjoedt
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Gu RX, Ingólfsson HI, de Vries AH, Marrink SJ, Tieleman DP. Ganglioside-Lipid and Ganglioside-Protein Interactions Revealed by Coarse-Grained and Atomistic Molecular Dynamics Simulations. J Phys Chem B 2016; 121:3262-3275. [PMID: 27610460 PMCID: PMC5402298 DOI: 10.1021/acs.jpcb.6b07142] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Gangliosides are glycolipids in which an oligosaccharide headgroup containing one or more sialic acids is connected to a ceramide. Gangliosides reside in the outer leaflet of the plasma membrane and play a crucial role in various physiological processes such as cell signal transduction and neuronal differentiation by modulating structures and functions of membrane proteins. Because the detailed behavior of gangliosides and protein-ganglioside interactions are poorly known, we investigated the interactions between the gangliosides GM1 and GM3 and the proteins aquaporin (AQP1) and WALP23 using equilibrium molecular dynamics simulations and potential of mean force calculations at both coarse-grained (CG) and atomistic levels. In atomistic simulations, on the basis of the GROMOS force field, ganglioside aggregation appears to be a result of the balance between hydrogen bond interactions and steric hindrance of the headgroups. GM3 clusters are slightly larger and more ordered than GM1 clusters due to the smaller headgroup of GM3. The different structures of GM1 and GM3 clusters from atomistic simulations are not observed at the CG level based on the Martini model, implying a difference in driving forces for ganglioside interactions in atomistic and CG simulations. For protein-ganglioside interactions, in the atomistic simulations, GM1 lipids bind to specific sites on the AQP1 surface, whereas they are depleted from WALP23. In the CG simulations, the ganglioside binding sites on the AQP1 surface are similar, but ganglioside aggregation and protein-ganglioside interactions are more prevalent than in the atomistic simulations. Using the polarizable Martini water model, results were closer to the atomistic simulations. Although experimental data for validation is lacking, we proposed modified Martini parameters for gangliosides to more closely mimic the sizes and structures of ganglioside clusters observed at the atomistic level.
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Affiliation(s)
- Ruo-Xu Gu
- Centre for Molecular Simulation and Department of Biological Sciences, University of Calgary , 2500 University Drive, N.W., Calgary, Alberta T2N 1N4, Canada
| | - Helgi I Ingólfsson
- Groningen Biomolecular Sciences and Biotechnology (GBB) Institute and Zernike Institute for Advanced Materials, University of Groningen , Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Alex H de Vries
- Groningen Biomolecular Sciences and Biotechnology (GBB) Institute and Zernike Institute for Advanced Materials, University of Groningen , Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Siewert J Marrink
- Groningen Biomolecular Sciences and Biotechnology (GBB) Institute and Zernike Institute for Advanced Materials, University of Groningen , Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - D Peter Tieleman
- Centre for Molecular Simulation and Department of Biological Sciences, University of Calgary , 2500 University Drive, N.W., Calgary, Alberta T2N 1N4, Canada
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Plawecki M, Lheritier E, Clavarino G, Jourde-Chiche N, Ouili S, Paul S, Gout E, Sarrot-Reynauld F, Bardin N, Boëlle PY, Chiche L, Bouillet L, Thielens NM, Cesbron JY, Dumestre-Pérard C. Association between the Presence of Autoantibodies Targeting Ficolin-3 and Active Nephritis in Patients with Systemic Lupus Erythematosus. PLoS One 2016; 11:e0160879. [PMID: 27631981 PMCID: PMC5025237 DOI: 10.1371/journal.pone.0160879] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 07/26/2016] [Indexed: 01/23/2023] Open
Abstract
Systemic lupus erythematosus (SLE) is a chronic autoimmune disease characterized by the production of multiple autoantibodies. Antibodies against Ficolin-3 were previously identified in the sera of some SLE patients, but their prevalence and significance have not been yet investigated. The aims of this study were to determine the prevalence of anti-ficolin-3 antibodies among SLE patients and to investigate their potential as diagnostic and/or prognostic biomarkers in SLE. In this retrospective study, sera from SLE patients (n = 165) were selected from a preexisting declared biological collection. Samples from healthy controls (n = 48) were matched with SLE sera. Disease activity was determined according to the SLEDAI score. Anti-ficolin-3, anti-dsDNA and anti-C1q antibodies levels were measured in sera by ELISA. First, a highly significant difference was found in the anti-ficolin-3 levels between SLE patients and healthy subjects. Anti-ficolin-3 antibodies were detected as positive in 56 of 165 (34%) SLE patients. The titer of anti-ficolin-3 antibodies was correlated with the SLEDAI score (r = 0.38, p<0.0001). The presence of anti-ficolin-3 antibodies was associated with anti-C1q and anti-dsDNA antibodies. Regarding associations with clinical manifestations, the presence of active lupus nephritis was significantly associated with the presence of anti-ficolin-3 antibodies (p≤0.001). This association with renal involvement was higher with anti-ficolin-3 or anti-C1q antibodies than with other auto-antibodies. Interestingly, the combination of anti-ficolin-3 and anti-C1q antibodies demonstrated higher specificity than any other serological biomarker. These results suggest that anti-ficolin-3 antibodies could be useful for the diagnosis of active nephritis in SLE patients.
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Affiliation(s)
- Maëlle Plawecki
- Laboratoire d’Immunologie, pôle de Biologie, CHU Grenoble Alpes, Grenoble, France
| | - Elise Lheritier
- Laboratoire d’Immunologie, pôle de Biologie, CHU Grenoble Alpes, Grenoble, France
| | - Giovanna Clavarino
- Laboratoire d’Immunologie, pôle de Biologie, CHU Grenoble Alpes, Grenoble, France
- BNI team, TIMC-IMAG UMR5525 Université Grenoble Alpes, France
| | - Noémie Jourde-Chiche
- UMR_S 1076, Vascular Research Center of Marseille, Faculté de médecine, Aix-Marseille Université, Marseille, France
- Centre de Néphrologie et Transplantation Rénale, CHU de la Conception, Aix-Marseille University, Marseille, France
| | - Saber Ouili
- Laboratoire d’Immunologie, pôle de Biologie, CHU Grenoble Alpes, Grenoble, France
| | - Stéphane Paul
- Laboratoire d’Immunologie, GIMAPEA3064, CIC1488 Vaccinology INSERM, CHU de Saint-Etienne, Saint-Etienne, France
| | - Evelyne Gout
- Univ Grenoble Alpes, IBS, Grenoble, France
- CNRS, IBS, Grenoble, France
- CEA, IBS, Grenoble, France
| | - Françoise Sarrot-Reynauld
- Clinique Universitaire de Médecine Interne, pôle pluridisciplinaire de Médecine et de Gérontologie Clinique, CHU Grenoble Alpes, Grenoble, France
| | - Nathalie Bardin
- UMR_S 1076, Vascular Research Center of Marseille, Faculté de médecine, Aix-Marseille Université, Marseille, France
- Laboratoire d’Immunologie, Hôpital de la Conception, Aix-Marseille Université, Marseille, France
| | - Pierre -Yves Boëlle
- INSERM, UMR_S 1136, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Paris, France
| | - Laurent Chiche
- Service de Médecine Interne, Hôpital Européen, Marseille, France
| | - Laurence Bouillet
- Clinique Universitaire de Médecine Interne, pôle pluridisciplinaire de Médecine et de Gérontologie Clinique, CHU Grenoble Alpes, Grenoble, France
| | - Nicole M. Thielens
- Univ Grenoble Alpes, IBS, Grenoble, France
- CNRS, IBS, Grenoble, France
- CEA, IBS, Grenoble, France
| | - Jean-Yves Cesbron
- Laboratoire d’Immunologie, pôle de Biologie, CHU Grenoble Alpes, Grenoble, France
- BNI team, TIMC-IMAG UMR5525 Université Grenoble Alpes, France
| | - Chantal Dumestre-Pérard
- Laboratoire d’Immunologie, pôle de Biologie, CHU Grenoble Alpes, Grenoble, France
- BNI team, TIMC-IMAG UMR5525 Université Grenoble Alpes, France
- * E-mail:
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Geissner A, Seeberger PH. Glycan Arrays: From Basic Biochemical Research to Bioanalytical and Biomedical Applications. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2016; 9:223-47. [PMID: 27306309 DOI: 10.1146/annurev-anchem-071015-041641] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A major branch of glycobiology and glycan-focused biomedicine studies the interaction between carbohydrates and other biopolymers, most importantly, glycan-binding proteins. Today, this research into glycan-biopolymer interaction is unthinkable without glycan arrays, tools that enable high-throughput analysis of carbohydrate interaction partners. Glycan arrays offer many applications in basic biochemical research, for example, defining the specificity of glycosyltransferases and lectins such as immune receptors. Biomedical applications include the characterization and surveillance of influenza strains, identification of biomarkers for cancer and infection, and profiling of immune responses to vaccines. Here, we review major applications of glycan arrays both in basic and applied research. Given the dynamic nature of this rapidly developing field, we focus on recent findings.
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Affiliation(s)
- Andreas Geissner
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, 14476 Potsdam, Germany
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, 14195 Berlin, Germany;
| | - Peter H Seeberger
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, 14476 Potsdam, Germany
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, 14195 Berlin, Germany;
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Favier AL, Gout E, Reynard O, Ferraris O, Kleman JP, Volchkov V, Peyrefitte C, Thielens NM. Enhancement of Ebola Virus Infection via Ficolin-1 Interaction with the Mucin Domain of GP Glycoprotein. J Virol 2016; 90:5256-5269. [PMID: 26984723 PMCID: PMC4934759 DOI: 10.1128/jvi.00232-16] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 03/10/2016] [Indexed: 02/05/2023] Open
Abstract
UNLABELLED Ebola virus infection requires the surface viral glycoprotein to initiate entry into the target cells. The trimeric glycoprotein is a highly glycosylated viral protein which has been shown to interact with host C-type lectin receptors and the soluble complement recognition protein mannose-binding lectin, thereby enhancing viral infection. Similarly to mannose-binding lectin, ficolins are soluble effectors of the innate immune system that recognize particular glycans at the pathogen surface. In this study, we demonstrate that ficolin-1 interacts with the Zaire Ebola virus (EBOV) glycoprotein, and we characterized this interaction by surface plasmon resonance spectroscopy. Ficolin-1 was shown to bind to the viral glycoprotein with a high affinity. This interaction was mediated by the fibrinogen-like recognition domain of ficolin-1 and the mucin-like domain of the viral glycoprotein. Using a ficolin-1 control mutant devoid of sialic acid-binding capacity, we identified sialylated moieties of the mucin domain to be potential ligands on the glycoprotein. In cell culture, using both pseudotyped viruses and EBOV, ficolin-1 was shown to enhance EBOV infection independently of the serum complement. We also observed that ficolin-1 enhanced EBOV infection on human monocyte-derived macrophages, described to be major viral target cells,. Competition experiments suggested that although ficolin-1 and mannose-binding lectin recognized different carbohydrate moieties on the EBOV glycoprotein, the observed enhancement of the infection likely depended on a common cellular receptor/partner. In conclusion, ficolin-1 could provide an alternative receptor-mediated mechanism for enhancing EBOV infection, thereby contributing to viral subversion of the host innate immune system. IMPORTANCE A specific interaction involving ficolin-1 (M-ficolin), a soluble effector of the innate immune response, and the glycoprotein (GP) of EBOV was identified. Ficolin-1 enhanced virus infection instead of tipping the balance toward its elimination. An interaction between the fibrinogen-like recognition domain of ficolin-1 and the mucin-like domain of Ebola virus GP occurred. In this model, the enhancement of infection was shown to be independent of the serum complement. The facilitation of EBOV entry into target host cells by the interaction with ficolin-1 and other host lectins shunts virus elimination, which likely facilitates the survival of the virus in infected host cells and contributes to the virus strategy to subvert the innate immune response.
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Affiliation(s)
- Anne-Laure Favier
- Unité de Virologie, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France
| | - Evelyne Gout
- Université Grenoble Alpes, Grenoble, France
- CNRS, IBS, Grenoble, France
- CEA, IBS, Grenoble, France
| | - Olivier Reynard
- Molecular Basis of Viral Pathogenicity, Centre International de Recherche en Infectiologie (CIRI), INSERM U1111-CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Olivier Ferraris
- Unité de Virologie, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France
| | - Jean-Philippe Kleman
- Université Grenoble Alpes, Grenoble, France
- CNRS, IBS, Grenoble, France
- CEA, IBS, Grenoble, France
| | - Viktor Volchkov
- Molecular Basis of Viral Pathogenicity, Centre International de Recherche en Infectiologie (CIRI), INSERM U1111-CNRS UMR5308, Université Lyon 1, ENS de Lyon, Lyon, France
| | - Christophe Peyrefitte
- Unité de Virologie, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France
| | - Nicole M Thielens
- Université Grenoble Alpes, Grenoble, France
- CNRS, IBS, Grenoble, France
- CEA, IBS, Grenoble, France
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Man-Kupisinska A, Michalski M, Maciejewska A, Swierzko AS, Cedzynski M, Lugowski C, Lukasiewicz J. A New Ligand-Based Method for Purifying Active Human Plasma-Derived Ficolin-3 Complexes Supports the Phenomenon of Crosstalk between Pattern-Recognition Molecules and Immunoglobulins. PLoS One 2016; 11:e0156691. [PMID: 27232184 PMCID: PMC4883783 DOI: 10.1371/journal.pone.0156691] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 05/18/2016] [Indexed: 11/18/2022] Open
Abstract
Despite recombinant protein technology development, proteins isolated from natural sources remain important for structure and activity determination. Ficolins represent a class of proteins that are difficult to isolate. To date, three methods for purifying ficolin-3 from plasma/serum have been proposed, defined by most critical step: (i) hydroxyapatite absorption chromatography (ii) N-acetylated human serum albumin affinity chromatography and (iii) anti-ficolin-3 monoclonal antibody-based affinity chromatography. We present a new protocol for purifying ficolin-3 complexes from human plasma that is based on an exclusive ligand: the O-specific polysaccharide of Hafnia alvei PCM 1200 LPS (O-PS 1200). The protocol includes (i) poly(ethylene glycol) precipitation; (ii) yeast and l-fucose incubation, for depletion of mannose-binding lectin; (iii) affinity chromatography using O-PS 1200-Sepharose; (iv) size-exclusion chromatography. Application of this protocol yielded average 2.2 mg of ficolin-3 preparation free of mannose-binding lectin (MBL), ficolin-1 and -2 from 500 ml of plasma. The protein was complexed with MBL-associated serine proteases (MASPs) and was able to activate the complement in vitro. In-process monitoring of MBL, ficolins, and total protein content revealed the presence of difficult-to-remove immunoglobulin G, M and A, in some extent in agreement with recent findings suggesting crosstalk between IgG and ficolin-3. We demonstrated that recombinant ficolin-3 interacts with IgG and IgM in a concentration-dependent manner. Although this association does not appear to influence ficolin-3-ligand interactions in vitro, it may have numerous consequences in vivo. Thus our purification procedure provides Ig-ficolin-3/MASP complexes that might be useful for gaining further insight into the crosstalk and biological activity of ficolin-3.
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Affiliation(s)
- Aleksandra Man-Kupisinska
- Department of Immunochemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Mateusz Michalski
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
- Institute of Microbiology, Immunology and Biotechnology, University of Lodz, Lodz, Poland
| | - Anna Maciejewska
- Department of Immunochemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Anna S. Swierzko
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
| | - Maciej Cedzynski
- Laboratory of Immunobiology of Infections, Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
| | - Czeslaw Lugowski
- Department of Immunochemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Jolanta Lukasiewicz
- Department of Immunochemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
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Glycoclusters as lectin inhibitors: comparative analysis on two plant agglutinins with different folding as a step towards rules for selectivity. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.07.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Sharp JA, Hair PS, Pallera HK, Kumar PS, Mauriello CT, Nyalwidhe JO, Phelps CA, Park D, Thielens NM, Pascal SM, Chen W, Duffy DM, Lattanzio FA, Cunnion KM, Krishna NK. Peptide Inhibitor of Complement C1 (PIC1) Rapidly Inhibits Complement Activation after Intravascular Injection in Rats. PLoS One 2015; 10:e0132446. [PMID: 26196285 PMCID: PMC4511006 DOI: 10.1371/journal.pone.0132446] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 06/15/2015] [Indexed: 12/20/2022] Open
Abstract
The complement system has been increasingly recognized to play a pivotal role in a variety of inflammatory and autoimmune diseases. Consequently, therapeutic modulators of the classical, lectin and alternative pathways of the complement system are currently in pre-clinical and clinical development. Our laboratory has identified a peptide that specifically inhibits the classical and lectin pathways of complement and is referred to as Peptide Inhibitor of Complement C1 (PIC1). In this study, we determined that the lead PIC1 variant demonstrates a salt-dependent binding to C1q, the initiator molecule of the classical pathway. Additionally, this peptide bound to the lectin pathway initiator molecule MBL as well as the ficolins H, M and L, suggesting a common mechanism of PIC1 inhibitory activity occurs via binding to the collagen-like tails of these collectin molecules. We further analyzed the effect of arginine and glutamic acid residue substitution on the complement inhibitory activity of our lead derivative in a hemolytic assay and found that the original sequence demonstrated superior inhibitory activity. To improve upon the solubility of the lead derivative, a pegylated, water soluble variant was developed, structurally characterized and demonstrated to inhibit complement activation in mouse plasma, as well as rat, non-human primate and human serum in vitro. After intravenous injection in rats, the pegylated derivative inhibited complement activation in the blood by 90% after 30 seconds, demonstrating extremely rapid function. Additionally, no adverse toxicological effects were observed in limited testing. Together these results show that PIC1 rapidly inhibits classical complement activation in vitro and in vivo and is functional for a variety of animal species, suggesting its utility in animal models of classical complement-mediated diseases.
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Affiliation(s)
- Julia A. Sharp
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Pamela S. Hair
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Haree K. Pallera
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Parvathi S. Kumar
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Clifford T. Mauriello
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Julius O. Nyalwidhe
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
- The Leroy T. Canoles Jr. Cancer Research Center, Norfolk, Virginia, United States of America
| | - Cody A. Phelps
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Dalnam Park
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Nicole M. Thielens
- Univ. Grenoble Alpes, IBS, F-38044, Grenoble, France
- CNRS, IBS, F-38044, Grenoble, France
- CEA, IBS, F-38044, Grenoble, France
| | - Stephen M. Pascal
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia, United States of America
| | - Waldon Chen
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia, United States of America
| | - Diane M. Duffy
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Frank A. Lattanzio
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
| | - Kenji M. Cunnion
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
- Children’s Specialty Group, Norfolk, Virginia, United States of America
| | - Neel K. Krishna
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
- Department of Pediatrics, Eastern Virginia Medical School, Norfolk, Virginia, United States of America
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Schengrund CL. Gangliosides: glycosphingolipids essential for normal neural development and function. Trends Biochem Sci 2015; 40:397-406. [DOI: 10.1016/j.tibs.2015.03.007] [Citation(s) in RCA: 150] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/17/2015] [Accepted: 03/18/2015] [Indexed: 11/25/2022]
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Endo Y, Matsushita M, Fujita T. New insights into the role of ficolins in the lectin pathway of innate immunity. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2015; 316:49-110. [PMID: 25805122 DOI: 10.1016/bs.ircmb.2015.01.003] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In the innate immune system, a variety of recognition molecules provide the first-line host defense to prevent infection and maintain endogenous homeostasis. Ficolin is a soluble recognition molecule, which senses pathogen-associated molecular patterns on microbes and aberrant sugar structures on self-cells. It consists of a collagen-like stalk and a globular fibrinogen-like domain, the latter binding to carbohydrates such as N-acetylglucosamine. Ficolins have been widely identified in animals from higher invertebrates to mammals. In mammals, ficolins form complexes with mannose-binding lectin-associated serine proteases (MASPs), and ficolin-MASP complexes trigger complement activation via the lectin pathway. Once activated, complement mediates many immune responses including opsonization, phagocytosis, and cytokine production. Although the precise function of each ficolin is still under investigation, accumulating information suggests that ficolins have a crucial role in host defense by recognizing a variety of microorganisms and interacting with effector proteins.
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Affiliation(s)
- Yuichi Endo
- Department of Immunology, Fukushima Medical University School of Medicine, Fukushima, Japan; Radioisotope Research Center, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Misao Matsushita
- Department of Applied Biochemistry, Tokai University, Kanagawa, Japan
| | - Teizo Fujita
- Department of Immunology, Fukushima Medical University School of Medicine, Fukushima, Japan; Fukushima General Hygiene Institute, Fukushima, Japan
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Hein E, Munthe-Fog L, Thiara AS, Fiane AE, Mollnes TE, Garred P. Heparin-coated cardiopulmonary bypass circuits selectively deplete the pattern recognition molecule ficolin-2 of the lectin complement pathway in vivo. Clin Exp Immunol 2015; 179:294-9. [PMID: 25174443 PMCID: PMC4298406 DOI: 10.1111/cei.12446] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/27/2014] [Indexed: 12/28/2022] Open
Abstract
The complement system can be activated via the lectin pathway by the recognition molecules mannose-binding lectin (MBL) and the ficolins. Ficolin-2 exhibits binding against a broad range of ligands, including biomaterials in vitro, and low ficolin-2 levels are associated with increased risk of infections. Thus, we investigated the biocompatibility of the recognition molecules of the lectin pathway in two different types of cardiopulmonary bypass circuits. Bloods were drawn at five time-points before, during and postoperatively from 30 patients undergoing elective cardiac surgery. Patients were randomized into two groups using different coatings of cardiopulmonary bypass circuits, Phisio® (phosphorylcholine polymer coating) and Bioline® (albumin-heparin coating). Concentrations of MBL, ficolin-1, -2 and -3 and soluble C3a and terminal complement complex (TCC) in plasma samples were measured. Ficolin-3-mediated complement activation potential was evaluated with C4, C3 and TCC as output. There was no significant difference between the two circuit materials regarding MBL, ficolin-1 and -3. In the Bioline® group the ficolin-2 levels decreased significantly after initiation of surgery (P < 0.0001) and remained reduced throughout the sampling period. This was not seen for Phisio®-coated circuits. Ficolin-3-mediated complement activation potential was reduced significantly in both groups after start of operation (P < 0.0001), whereas soluble C3a and TCC in the samples were increased (P < 0.0001). Ficolin-2 was depleted from plasma during cardiac surgery when using heparin-coated bypass circuits and did not reach baseline level 24 h postoperation. These findings may have implications for the postoperative susceptibility to infections in patients undergoing extracorporeal circulation procedures.
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Affiliation(s)
- E Hein
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, Faculty of Health Sciences, University of CopenhagenCopenhagen, Norway
| | - L Munthe-Fog
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, Faculty of Health Sciences, University of CopenhagenCopenhagen, Norway
| | - A S Thiara
- Department of Cardiothoracic Surgery, Oslo University HospitalOslo, Norway
| | - A E Fiane
- Department of Cardiothoracic Surgery, Oslo University HospitalOslo, Norway
- Centre of Molecular Inflammation Research, Norwegian University of Science and TechnologyTrondheim, Norway
| | - T E Mollnes
- Department of Immunology, Oslo University Hospital Rikshospitalet, K.G.Jebsen IRC, University of OsloOslo, Norway
- Centre of Molecular Inflammation Research, Norwegian University of Science and TechnologyTrondheim, Norway
- Research Laboratory, Nordland Hospital, Bodø, and Faculty of Health Sciences, K.G. Jebsen TREC, University of TromsøTromsø, Norway
| | - P Garred
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, Faculty of Health Sciences, University of CopenhagenCopenhagen, Norway
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Hein E, Garred P. The Lectin Pathway of Complement and Biocompatibility. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 865:77-92. [PMID: 26306444 DOI: 10.1007/978-3-319-18603-0_5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In modern health technologies the use of biomaterials in the form of stents, haemodialysis tubes, artificial implants, bypass circuits etc. is rapidly expanding. The exposure of synthetic, foreign surfaces to the blood and tissue of the host, calls for strict biocompatibility in respect to contact activation, the coagulation system and the complement system. The complement system is an important part of the initial immune response and consists of fluid phase molecules in the blood stream. Three different activation pathways can initiate the complement system, the lectin, the classical and the alternative pathway, all converging in an amplification loop of the cascade system and downstream reactions. Thus, when exposed to foreign substances complement components will be activated and lead to a powerful inflammatory response. Biosurface induced complement activation is a recognised issue that has been broadly documented. However, the specific role of lectin pathway and the pattern recognition molecules initiating the pathway has only been transiently investigated. Here we review the current data on the field.
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Affiliation(s)
- Estrid Hein
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Section 7631, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 9, 2100, Copenhagen O, Denmark
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