1
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Nunes J, Tafesse R, Mao C, Purcell M, Mo X, Zhang L, Long M, Cyr MG, Rader C, Muthusamy N. Siglec-6 as a therapeutic target for cell migration and adhesion in chronic lymphocytic leukemia. Nat Commun 2024; 15:5180. [PMID: 38890323 PMCID: PMC11189495 DOI: 10.1038/s41467-024-48678-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 05/08/2024] [Indexed: 06/20/2024] Open
Abstract
Siglec-6 is a lectin receptor with restricted expression in the placenta, mast cells and memory B-cells. Although Siglec-6 is expressed in patients with chronic lymphocytic leukemia (CLL), its pathophysiological role has not been elucidated. We describe here a role for Siglec-6 in migration and adhesion of CLL B cells to CLL- bone marrow stromal cells (BMSCs) in vitro and compromised migration to bone marrow and spleen in vivo. Mass spectrometry analysis revealed interaction of Siglec-6 with DOCK8, a guanine nucleotide exchange factor. Stimulation of MEC1-002 CLL cells with a Siglec-6 ligand, sTn, results in Cdc42 activation, WASP protein recruitment and F-actin polymerization, which are all associated with cell migration. Therapeutically, a Siglec-6/CD3-bispecific T-cell-recruiting antibody (T-biAb) improves overall survival in an immunocompetent mouse model and eliminates CLL cells in a patient derived xenograft model. Our findings thus reveal a migratory role for Siglec-6 in CLL, which can be therapeutically targeted using a Siglec-6 specific T-biAb.
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MESH Headings
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Humans
- Animals
- Cell Movement
- Cell Adhesion
- Lectins/metabolism
- Mice
- Antigens, CD/metabolism
- Antigens, CD/genetics
- Female
- B-Lymphocytes/metabolism
- B-Lymphocytes/immunology
- Antigens, Differentiation, Myelomonocytic/metabolism
- Antigens, Differentiation, Myelomonocytic/genetics
- Cell Line, Tumor
- Mesenchymal Stem Cells/metabolism
- Male
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Jessica Nunes
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
- Molecular, Cellular and Developmental Biology Graduate Program, The Ohio State University, Columbus, OH, USA
| | - Rakeb Tafesse
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
- Molecular, Cellular and Developmental Biology Graduate Program, The Ohio State University, Columbus, OH, USA
| | - Charlene Mao
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Matthew Purcell
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Xiaokui Mo
- Center for Biostatistics, The Ohio State University, Columbus, OH, USA
| | - Liwen Zhang
- Campus Chemical Instrument Center, The Ohio State University, Columbus, OH, USA
| | - Meixiao Long
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
- Division of Hematology, Department of Internal Medicine, The Ohio State University, Columbus, OH, USA
| | - Matthew G Cyr
- UF Scripps Biomedical Research, University of Florida, Jupiter, FL, USA
| | - Christoph Rader
- UF Scripps Biomedical Research, University of Florida, Jupiter, FL, USA
| | - Natarajan Muthusamy
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA.
- Division of Hematology, Department of Internal Medicine, The Ohio State University, Columbus, OH, USA.
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2
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Tian W, Blomberg AL, Steinberg KE, Henriksen BL, Jørgensen JS, Skovgaard K, Skovbakke SL, Goletz S. Novel genetically glycoengineered human dendritic cell model reveals regulatory roles of α2,6-linked sialic acids in DC activation of CD4+ T cells and response to TNFα. Glycobiology 2024; 34:cwae042. [PMID: 38873803 DOI: 10.1093/glycob/cwae042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 05/08/2024] [Accepted: 05/31/2024] [Indexed: 06/15/2024] Open
Abstract
Dendritic cells (DCs) are central for the initiation and regulation of appropriate immune responses. While several studies suggest important regulatory roles of sialoglycans in DC biology, our understanding is still inadequate primarily due to a lack of appropriate models. Previous approaches based on enzymatic- or metabolic-glycoengineering and primary cell isolation from genetically modified mice have limitations related to specificity, stability, and species differences. This study addresses these challenges by introducing a workflow to genetically glycoengineer the human DC precursor cell line MUTZ-3, described to differentiate and maturate into fully functional dendritic cells, using CRISPR-Cas9, thereby providing and validating the first isogenic cell model for investigating glycan alteration on human DC differentiation, maturation, and activity. By knocking out (KO) the ST6GAL1 gene, we generated isogenic cells devoid of ST6GAL1-mediated α(2,6)-linked sialylation, allowing for a comprehensive investigation into its impact on DC function. Glycan profiling using lectin binding assay and functional studies revealed that ST6GAL1 KO increased the expression of important antigen presenting and co-stimulatory surface receptors and a specifically increased activation of allogenic human CD4 + T cells. Additionally, ST6GAL1 KO induces significant changes in surface marker expression and cytokine response to TNFα-induced maturation, and it affects migration and the endocytic capacity. These results indicate that genetic glycoengineering of the isogenic MUTZ-3 cellular model offers a valuable tool to study how specific glycan structures influence human DC biology, contributing to our understanding of glycoimmunology.
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Affiliation(s)
- Weihua Tian
- Biotherapeutic Glycoengineering and Immunology, Section for Medical Biotechnology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Kgs Lyngby 2800, Denmark
| | - Anne Louise Blomberg
- Biotherapeutic Glycoengineering and Immunology, Section for Medical Biotechnology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Kgs Lyngby 2800, Denmark
| | - Kaylin Elisabeth Steinberg
- Biotherapeutic Glycoengineering and Immunology, Section for Medical Biotechnology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Kgs Lyngby 2800, Denmark
| | - Betina Lyngfeldt Henriksen
- Biotherapeutic Glycoengineering and Immunology, Section for Medical Biotechnology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Kgs Lyngby 2800, Denmark
| | - Josefine Søborg Jørgensen
- Biotherapeutic Glycoengineering and Immunology, Section for Medical Biotechnology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Kgs Lyngby 2800, Denmark
| | - Kerstin Skovgaard
- Biotherapeutic Glycoengineering and Immunology, Section for Medical Biotechnology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Kgs Lyngby 2800, Denmark
| | - Sarah Line Skovbakke
- Biotherapeutic Glycoengineering and Immunology, Section for Medical Biotechnology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Kgs Lyngby 2800, Denmark
| | - Steffen Goletz
- Biotherapeutic Glycoengineering and Immunology, Section for Medical Biotechnology, Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Kgs Lyngby 2800, Denmark
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3
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Zareein A, Mahmoudi M, Jadhav SS, Wilmore J, Wu Y. Biomaterial engineering strategies for B cell immunity modulations. Biomater Sci 2024; 12:1981-2006. [PMID: 38456305 PMCID: PMC11019864 DOI: 10.1039/d3bm01841e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 02/23/2024] [Indexed: 03/09/2024]
Abstract
B cell immunity has a penetrating effect on human health and diseases. Therapeutics aiming to modulate B cell immunity have achieved remarkable success in combating infections, autoimmunity, and malignancies. However, current treatments still face significant limitations in generating effective long-lasting therapeutic B cell responses for many conditions. As the understanding of B cell biology has deepened in recent years, clearer regulation networks for B cell differentiation and antibody production have emerged, presenting opportunities to overcome current difficulties and realize the full therapeutic potential of B cell immunity. Biomaterial platforms have been developed to leverage these emerging concepts to augment therapeutic humoral immunity by facilitating immunogenic reagent trafficking, regulating T cell responses, and modulating the immune microenvironment. Moreover, biomaterial engineering tools have also advanced our understanding of B cell biology, further expediting the development of novel therapeutics. In this review, we will introduce the general concept of B cell immunobiology and highlight key biomaterial engineering strategies in the areas including B cell targeted antigen delivery, sustained B cell antigen delivery, antigen engineering, T cell help optimization, and B cell suppression. We will also discuss our perspective on future biomaterial engineering opportunities to leverage humoral immunity for therapeutics.
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Affiliation(s)
- Ali Zareein
- Department of Biomedical Engineering, Syracuse University, Syracuse, NY, USA.
- The BioInspired Institute for Material and Living Systems, Syracuse University, Syracuse, NY, USA
| | - Mina Mahmoudi
- Department of Biomedical Engineering, Syracuse University, Syracuse, NY, USA.
- The BioInspired Institute for Material and Living Systems, Syracuse University, Syracuse, NY, USA
| | - Shruti Sunil Jadhav
- Department of Biomedical Engineering, Syracuse University, Syracuse, NY, USA.
| | - Joel Wilmore
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Yaoying Wu
- Department of Biomedical Engineering, Syracuse University, Syracuse, NY, USA.
- The BioInspired Institute for Material and Living Systems, Syracuse University, Syracuse, NY, USA
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, USA
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4
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Gutierrez Reyes CD, Atashi M, Fowowe M, Onigbinde S, Daramola O, Lubman DM, Mechref Y. Differential expression of N-glycopeptides derived from serum glycoproteins in mild cognitive impairment (MCI) patients. Proteomics 2024:e2300620. [PMID: 38602241 DOI: 10.1002/pmic.202300620] [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: 11/22/2023] [Revised: 03/15/2024] [Accepted: 03/19/2024] [Indexed: 04/12/2024]
Abstract
Mild cognitive impairment (MCI) is an early stage of memory loss that affects cognitive abilities with the aging of individuals, such as language or visual/spatial comprehension. MCI is considered a prodromal phase of more complicated neurodegenerative diseases such as Alzheimer's. Therefore, accurate diagnosis and better understanding of the disease prognosis will facilitate prevention of neurodegeneration. However, the existing diagnostic methods fail to provide precise and well-timed diagnoses, and the pathophysiology of MCI is not fully understood. Alterations of the serum N-glycoproteome expression could represent an essential contributor to the overall pathophysiology of neurodegenerative diseases and be used as a potential marker to assess MCI diagnosis using less invasive procedures. In this approach, we identified N-glycopeptides with different expressions between healthy and MCI patients from serum glycoproteins. Seven of the N-glycopeptides showed outstanding AUC values, among them the antithrombin-III Asn224 + 4-5-0-2 with an AUC value of 1.00 and a p value of 0.0004. According to proteomics and ingenuity pathway analysis (IPA), our data is in line with recent publications, and the glycoproteins carrying the identified N-sites play an important role in neurodegeneration.
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Affiliation(s)
| | - Mojgan Atashi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA
| | - Mojibola Fowowe
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA
| | - Sherifdeen Onigbinde
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA
| | - Oluwatosin Daramola
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA
| | - David M Lubman
- Department of Surgery, The University of Michigan, Ann Arbor, Michigan, USA
| | - Yehia Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, USA
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5
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Ayyalasomayajula R, Cudic M. Targeting Siglec-Sialylated MUC1 Immune Axis in Cancer. Cancers (Basel) 2024; 16:1334. [PMID: 38611013 PMCID: PMC11011055 DOI: 10.3390/cancers16071334] [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: 12/31/2023] [Revised: 03/12/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
Siglecs play a key role in mediating cell-cell interactions via the recognition of different sialylated glycoconjugates, including tumor-associated MUC1, which can lead to the activation or inhibition of the immune response. The activation occurs through the signaling of Siglecs with the cytoplasmic immunoreceptor tyrosine-based activation motif (ITAM)-containing proteins, while the inhibition signal is a result of the interaction of intracellular immunoreceptor tyrosine-based inhibition motif (ITIM)-bearing receptors. The interaction of tumor-associated MUC1 sialylated glycans with Siglecs via ITIM motifs decreases antitumor immunity. Consequently, these interactions are expected to play a key role in tumor evasion. Efforts to modulate the response of immune cells by blocking the immune-suppressive effects of inhibitory Siglecs, driving immune-activating Siglecs, and/or altering the synthesis and expression of the sialic acid glycocalyx are new therapeutic strategies deserving further investigation. We will highlight the role of Siglec's family receptors in immune evasion through interactions with glycan ligands in their natural context, presented on the protein such as MUC1, factors affecting their fine binding specificities, such as the role of multivalency either at the ligand or receptor side, their spatial organization, and finally the current and future therapeutic interventions targeting the Siglec-sialylated MUC1 immune axis in cancer.
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Affiliation(s)
| | - Mare Cudic
- Department of Chemistry and Biochemistry, Florida Atlantic University, 777 Glades Rd., Boca Raton, FL 33431, USA;
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6
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Atxabal U, Nycholat C, Pröpster JM, Fernández A, Oyenarte I, Lenza MP, Franconetti A, Soares CO, Coelho H, Marcelo F, Schubert M, Paulson JC, Jiménez-Barbero J, Ereño-Orbea J. Unraveling Molecular Recognition of Glycan Ligands by Siglec-9 via NMR Spectroscopy and Molecular Dynamics Modeling. ACS Chem Biol 2024; 19:483-496. [PMID: 38321945 PMCID: PMC10877568 DOI: 10.1021/acschembio.3c00664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/09/2024] [Accepted: 01/16/2024] [Indexed: 02/08/2024]
Abstract
Human sialic-acid-binding immunoglobulin-like lectin-9 (Siglec-9) is a glycoimmune checkpoint receptor expressed on several immune cells. Binding of Siglec-9 to sialic acid containing glycans (sialoglycans) is well documented to modulate its functions as an inhibitory receptor. Here, we first assigned the amino acid backbone of the Siglec-9 V-set domain (Siglec-9d1), using well-established triple resonance three-dimensional nuclear magnetic resonance (NMR) methods. Then, we combined solution NMR and molecular dynamic simulation methods to decipher the molecular details of the interaction of Siglec-9 with the natural ligands α2,3 and α2,6 sialyl lactosamines (SLN), sialyl Lewis X (sLeX), and 6-O sulfated sLeX and with two synthetically modified sialoglycans that bind with high affinity. As expected, Neu5Ac is accommodated between the F and G β-strands at the canonical sialic acid binding site. Addition of a heteroaromatic scaffold 9N-5-(2-methylthiazol-4-yl)thiophene sulfonamide (MTTS) at the C9 position of Neu5Ac generates new interactions with the hydrophobic residues located at the G-G' loop and the N-terminal region of Siglec-9. Similarly, the addition of the aromatic substituent (5-N-(1-benzhydryl-1H-1,2,3-triazol-4-yl)methyl (BTC)) at the C5 position of Neu5Ac stabilizes the conformation of the long and flexible B'-C loop present in Siglec-9. These results expose the underlying mechanism responsible for the enhanced affinity and specificity for Siglec-9 for these two modified sialoglycans and sheds light on the rational design of the next generation of modified sialoglycans targeting Siglec-9.
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Affiliation(s)
- Unai Atxabal
- Chemical
Glycobiology Lab, Center for Cooperative Research in Biosciences (CIC
bioGUNE), Basque Research and Technology
Alliance (BRTA), 48160 Derio, Bizkaia, Spain
| | - Corwin Nycholat
- Departments
of Molecular Medicine and Immunology and Microbiology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Johannes M. Pröpster
- Institute
of Molecular Biology and Biophysics, ETH Zurich, 8093 Zurich, Switzerland
| | - Andrea Fernández
- Chemical
Glycobiology Lab, Center for Cooperative Research in Biosciences (CIC
bioGUNE), Basque Research and Technology
Alliance (BRTA), 48160 Derio, Bizkaia, Spain
| | - Iker Oyenarte
- Chemical
Glycobiology Lab, Center for Cooperative Research in Biosciences (CIC
bioGUNE), Basque Research and Technology
Alliance (BRTA), 48160 Derio, Bizkaia, Spain
| | - Maria Pia Lenza
- Chemical
Glycobiology Lab, Center for Cooperative Research in Biosciences (CIC
bioGUNE), Basque Research and Technology
Alliance (BRTA), 48160 Derio, Bizkaia, Spain
| | - Antonio Franconetti
- Chemical
Glycobiology Lab, Center for Cooperative Research in Biosciences (CIC
bioGUNE), Basque Research and Technology
Alliance (BRTA), 48160 Derio, Bizkaia, Spain
| | - Cátia O. Soares
- Associate
Laboratory i4HB - Institute for Health and Bioeconomy, NOVA School
of Science and Technology, Universidade
NOVA de Lisboa, 2829-516 Caparica, Portugal
- UCIBIO,
Department of Chemistry, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Helena Coelho
- Associate
Laboratory i4HB - Institute for Health and Bioeconomy, NOVA School
of Science and Technology, Universidade
NOVA de Lisboa, 2829-516 Caparica, Portugal
- UCIBIO,
Department of Chemistry, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Filipa Marcelo
- Associate
Laboratory i4HB - Institute for Health and Bioeconomy, NOVA School
of Science and Technology, Universidade
NOVA de Lisboa, 2829-516 Caparica, Portugal
- UCIBIO,
Department of Chemistry, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Mario Schubert
- Institute
of Molecular Biology and Biophysics, ETH Zurich, 8093 Zurich, Switzerland
- Department
of Biosciences and Molecular Biology, University
of Salzburg, Hellbrunnerstrasse
34, 5020 Salzburg, Austria
| | - James C. Paulson
- Departments
of Molecular Medicine and Immunology and Microbiology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jesús Jiménez-Barbero
- Chemical
Glycobiology Lab, Center for Cooperative Research in Biosciences (CIC
bioGUNE), Basque Research and Technology
Alliance (BRTA), 48160 Derio, Bizkaia, Spain
- Ikerbasque,
Basque Foundation for Science, Euskadi Pl., 5, 48009 Bilbao, Biscay, Spain
- Department
of Organic and Inorganic Chemistry, Faculty of Science and Technology, University of the Basque Country, EHU-UPV, 48940 Leioa, Bizkaia, Spain
- Centro
de Investigacion Biomedica en Red de Enfermedades Respiratorias, Av. Monforte de Lemos, 3-5, Pabellón
11, Planta 0, 28029 Madrid, Spain
| | - June Ereño-Orbea
- Chemical
Glycobiology Lab, Center for Cooperative Research in Biosciences (CIC
bioGUNE), Basque Research and Technology
Alliance (BRTA), 48160 Derio, Bizkaia, Spain
- Ikerbasque,
Basque Foundation for Science, Euskadi Pl., 5, 48009 Bilbao, Biscay, Spain
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7
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Zhong J, Li J, Burton GJ, Koistinen H, Cheung KW, Ng EHY, Yao Y, Yeung WSB, Lee CL, Chiu PCN. The functional roles of protein glycosylation in human maternal-fetal crosstalk. Hum Reprod Update 2024; 30:81-108. [PMID: 37699855 DOI: 10.1093/humupd/dmad024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/20/2023] [Indexed: 09/14/2023] Open
Abstract
BACKGROUND The establishment of maternal-fetal crosstalk is vital to a successful pregnancy. Glycosylation is a post-translational modification in which glycans (monosaccharide chains) are attached to an organic molecule. Glycans are involved in many physiological and pathological processes. Human endometrial epithelium, endometrial gland secretions, decidual immune cells, and trophoblasts are highly enriched with glycoconjugates and glycan-binding molecules important for a healthy pregnancy. Aberrant glycosylation in the placenta and uterus has been linked to repeated implantation failure and various pregnancy complications, but there is no recent review summarizing the functional roles of glycosylation at the maternal-fetal interface and their associations with pathological processes. OBJECTIVE AND RATIONALE This review aims to summarize recent findings on glycosylation, glycosyltransferases, and glycan-binding receptors at the maternal-fetal interface, and their involvement in regulating the biology and pathological conditions associated with endometrial receptivity, placentation and maternal-fetal immunotolerance. Current knowledge limitations and future insights into the study of glycobiology in reproduction are discussed. SEARCH METHODS A comprehensive PubMed search was conducted using the following keywords: glycosylation, glycosyltransferases, glycan-binding proteins, endometrium, trophoblasts, maternal-fetal immunotolerance, siglec, selectin, galectin, repeated implantation failure, early pregnancy loss, recurrent pregnancy loss, preeclampsia, and fetal growth restriction. Relevant reports published between 1980 and 2023 and studies related to these reports were retrieved and reviewed. Only publications written in English were included. OUTCOMES The application of ultrasensitive mass spectrometry tools and lectin-based glycan profiling has enabled characterization of glycans present at the maternal-fetal interface and in maternal serum. The endometrial luminal epithelium is covered with highly glycosylated mucin that regulates blastocyst adhesion during implantation. In the placenta, fucose and sialic acid residues are abundantly presented on the villous membrane and are essential for proper placentation and establishment of maternal-fetal immunotolerance. Glycan-binding receptors, including selectins, sialic-acid-binding immunoglobulin-like lectins (siglecs) and galectins, also modulate implantation, trophoblast functions and maternal-fetal immunotolerance. Aberrant glycosylation is associated with repeated implantation failure, early pregnancy loss and various pregnancy complications. The current limitation in the field is that most glycobiological research relies on association studies, with few studies revealing the specific functions of glycans. Technological advancements in analytic, synthetic and functional glycobiology have laid the groundwork for further exploration of glycans in reproductive biology under both physiological and pathological conditions. WIDER IMPLICATIONS A deep understanding of the functions of glycan structures would provide insights into the molecular mechanisms underlying their involvement in the physiological and pathological regulation of early pregnancy. Glycans may also potentially serve as novel early predictive markers and therapeutic targets for repeated implantation failure, pregnancy loss, and other pregnancy complications.
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Affiliation(s)
- Jiangming Zhong
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China
- The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Jianlin Li
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China
| | - Graham J Burton
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - Hannu Koistinen
- Department of Clinical Chemistry and Haematology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Ka Wang Cheung
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China
| | - Ernest H Y Ng
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China
- The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Yuanqing Yao
- The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - William S B Yeung
- The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Cheuk-Lun Lee
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China
- The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Philip C N Chiu
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong S.A.R., China
- The University of Hong Kong Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
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8
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Dorst KM, Widmalm G. NMR chemical shift prediction and structural elucidation of linker-containing oligo- and polysaccharides using the computer program CASPER. Carbohydr Res 2023; 533:108937. [PMID: 37734222 DOI: 10.1016/j.carres.2023.108937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/01/2023] [Accepted: 09/01/2023] [Indexed: 09/23/2023]
Abstract
Carbohydrate structures containing alkyl groups as aglycones are useful for investigating enzyme activity and glycan-protein interactions. Moreover, linker-containing oligosaccharides with a spacer group are commonly used to print glycan microarrays or to prepare protein-conjugates as vaccine candidates. The structural accuracy of these synthesized glycans are essential for interpretation of results from biological experiments in which the compounds have been used and NMR spectroscopy can unravel and confirm their structures. An approach for efficient 1H and 13C NMR chemical shift assignments employed a parallel NOAH-10 measurement followed by NMR spin-simulation to refine the 1H NMR chemical shifts, as exemplified for a disaccharide with an azidoethyl group as an aglycone, the NMR chemical shifts of which have been used to enhance the quality of CASPER (http://www.casper.organ.su.se/casper/). The CASPER program has been further developed to aid characterization of linker-containing oligo- and polysaccharides, either by chemical shift prediction for comparison to experimental NMR data or as structural investigation of synthesized glycans based on acquired unassigned NMR data. The ability of CASPER to elucidate structures of linker-containing oligosaccharides is demonstrated and comparisons to assigned or unassigned NMR data show the utility of CASPER in supporting a proposed oligosaccharide structure. Prediction of NMR chemical shifts of an oligosaccharide, corresponding to the repeating unit of an O-antigen polysaccharide, having a linker as an aglycone and a non-natural substituent derivative thereof are presented to exemplify the diversity of structures handled. Furthermore, NMR chemical shift predictions of synthesized polysaccharides, corresponding to bacterial polysaccharides, containing a linker are described showing that in addition to oligosaccharide structures also polysaccharide structures having an aglycone spacer group can be analyzed by CASPER.
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Affiliation(s)
- Kevin M Dorst
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
| | - Göran Widmalm
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden.
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9
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Atashi M, Reyes CDG, Sandilya V, Purba W, Ahmadi P, Hakim MA, Kobeissy F, Plazzi G, Moresco M, Lanuzza B, Ferri R, Mechref Y. LC-MS/MS Quantitation of HILIC-Enriched N-glycopeptides Derived from Low-Abundance Serum Glycoproteins in Patients with Narcolepsy Type 1. Biomolecules 2023; 13:1589. [PMID: 38002271 PMCID: PMC10669497 DOI: 10.3390/biom13111589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 11/26/2023] Open
Abstract
Glycoproteomic analysis is always challenging because of low abundance and complex site-specific heterogeneity. Glycoproteins are involved in various biological processes such as cell signaling, adhesion, and cell-cell communication and may serve as potential biomarkers when analyzing different diseases. Here, we investigate glycoproteins in narcolepsy type 1 (NT1) disease, a form of narcolepsy characterized by cataplexy-the sudden onset of muscle paralysis that is typically triggered by intense emotions. In this study, 27 human blood serum samples were analyzed, 16 from NT1 patients and 11 from healthy individuals serving as controls. We quantified hydrophilic interaction liquid chromatography (HILIC)-enriched glycopeptides from low-abundance serum samples of controls and NT1 patients via LC-MS/MS. Twenty-eight unique N-glycopeptides showed significant changes between the two studied groups. The sialylated N-glycopeptide structures LPTQNITFQTESSVAEQEAEFQSPK HexNAc6, Hex3, Neu5Ac2 (derived from the ITIH4 protein) and the structure IVLDPSGSMNIYLVLDGSDSIGASNFTGAK HexNAc5, Hex4, Fuc1 (derived from the CFB protein), with p values of 0.008 and 0.01, respectively, were elevated in NT1 samples compared with controls. In addition, the N-glycopeptide protein sources Ceruloplasmin, Complement factor B, and ITH4 were observed to play an important role in the complement activation and acute-phase response signaling pathways. This may explain the possible association between the biomarkers and pathophysiological effects.
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Affiliation(s)
- Mojgan Atashi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA; (M.A.); (C.D.G.R.); (V.S.); (W.P.); (P.A.); (M.A.H.)
| | - Cristian D. Gutierrez Reyes
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA; (M.A.); (C.D.G.R.); (V.S.); (W.P.); (P.A.); (M.A.H.)
| | - Vishal Sandilya
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA; (M.A.); (C.D.G.R.); (V.S.); (W.P.); (P.A.); (M.A.H.)
| | - Waziha Purba
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA; (M.A.); (C.D.G.R.); (V.S.); (W.P.); (P.A.); (M.A.H.)
| | - Parisa Ahmadi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA; (M.A.); (C.D.G.R.); (V.S.); (W.P.); (P.A.); (M.A.H.)
| | - Md. Abdul Hakim
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA; (M.A.); (C.D.G.R.); (V.S.); (W.P.); (P.A.); (M.A.H.)
| | - Firas Kobeissy
- Department of biochemistry and molecular genetics, Faculty of Biochemistry and Molecular Genetics, American University of Beirut, Beirut 11072020, Lebanon;
- Department of Neurobiology, Center for Neurotrauma, Multiomics & Biomarkers (CNMB), Neuroscience Institute, Morehouse School of Medicine, Atlanta, GE 30310, USA
| | - Giuseppe Plazzi
- IRCCS, Instituto delle Scienze Neurologiche di Bologna, 40124 Bologna, Italy; (G.P.); (M.M.)
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Monica Moresco
- IRCCS, Instituto delle Scienze Neurologiche di Bologna, 40124 Bologna, Italy; (G.P.); (M.M.)
| | - Bartolo Lanuzza
- Sleep Research Center, Department of Neurology IC, Oasi Research Institute-IRCCS, 94018 Tronia, Italy; (B.L.); (R.F.)
| | - Raffaele Ferri
- Sleep Research Center, Department of Neurology IC, Oasi Research Institute-IRCCS, 94018 Tronia, Italy; (B.L.); (R.F.)
| | - Yehia Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA; (M.A.); (C.D.G.R.); (V.S.); (W.P.); (P.A.); (M.A.H.)
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10
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Wang Y, Peng Y, Long R, Shi P, Zhang Y, Kong DX, Zheng J, Wang X. Sequence variety in the CC' loop of Siglec-8/9/3 determines the recognitions to sulfated oligosaccharides. Comput Struct Biotechnol J 2023; 21:4159-4171. [PMID: 37675287 PMCID: PMC10477811 DOI: 10.1016/j.csbj.2023.08.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 08/18/2023] [Accepted: 08/18/2023] [Indexed: 09/08/2023] Open
Abstract
Siglecs are important lectins found in different types of immune cells and function as regulatory molecules by recognizing self-associated glycans and converting extracellular interactions into signals for inhibiting immune cell functions. Although many Siglecs have been found to show broad specificities and recognize different types of sulfated oligosaccharides, Siglec-8 and Siglec-9 displayed a high degree of specificity for sialyl N-acetyllactosamine (sLacNAc) with sulfations at O6-positions of the galactose (6'-sulfation) and N-acetylglucosamine (6-sulfation), respectively. Siglec-3 was recently discovered to bind sLacNAc both sulfations. In addition to a conserved arginine residue for binding to sialic acid residue, the sequence variety in the CC' loop may provide binding specificities to sulfated oligosaccharides in Siglecs. Thus, the present study employed molecular models to study the impact of different residues in the CC' loops of Siglec-8/9/3 to the recognitions of 6-sulfations in Gal and/or GlcNAc of sLacNAc. The negatively charged residues in the CC' loop of Siglec-9 formed unfavorable electrostatic repulsions with the 6-sulfate in Gal and resulted no recognitions, in contrast to the favorable interactions formed between the positively charged residues in the CC' loop of Siglec-8 and the 6-sulfate in Gal resulting strong specificity. A two-state binding model was proposed for Siglec-3 recognizing 6-sulfations in Gal and GlcNAc of sLacNAc, as the neutral residues in the CC' loop of Siglec-3 could not form strong favorable interactions to lock the 6-sulfate in Gal within a single binding pose or strong unfavorable interactions to repel the 6-sulfate in Gal. The oligosaccharide adopted two distinctive binding poses and oriented the sulfate groups to form interactions with residues in the CC' loop and G-strand. The present study provided a structural mechanism for the sequence variety in the CC' loop of Siglec-8/9/3 determining the recognitions to the sulfated oligosaccharides and offered insights into the binding specificities for Siglecs.
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Affiliation(s)
- Yucheng Wang
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Yujie Peng
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, Hubei 430070, China
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Rui Long
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, Hubei 430070, China
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Peiting Shi
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Yinghao Zhang
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - De-Xin Kong
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Jinshui Zheng
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, Hubei 430070, China
- National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Xiaocong Wang
- Hubei Key Laboratory of Agricultural Bioinformatics, College of Informatics, Huazhong Agricultural University, Wuhan, Hubei 430070, China
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11
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Lenza MP, Egia-Mendikute L, Antoñana-Vildosola A, Soares CO, Coelho H, Corzana F, Bosch A, Manisha P, Quintana JI, Oyenarte I, Unione L, Moure MJ, Azkargorta M, Atxabal U, Sobczak K, Elortza F, Sutherland JD, Barrio R, Marcelo F, Jiménez-Barbero J, Palazon A, Ereño-Orbea J. Structural insights into Siglec-15 reveal glycosylation dependency for its interaction with T cells through integrin CD11b. Nat Commun 2023; 14:3496. [PMID: 37311743 DOI: 10.1038/s41467-023-39119-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 05/26/2023] [Indexed: 06/15/2023] Open
Abstract
Sialic acid-binding Ig-like lectin 15 (Siglec-15) is an immune modulator and emerging cancer immunotherapy target. However, limited understanding of its structure and mechanism of action restrains the development of drug candidates that unleash its full therapeutic potential. In this study, we elucidate the crystal structure of Siglec-15 and its binding epitope via co-crystallization with an anti-Siglec-15 blocking antibody. Using saturation transfer-difference nuclear magnetic resonance (STD-NMR) spectroscopy and molecular dynamics simulations, we reveal Siglec-15 binding mode to α(2,3)- and α(2,6)-linked sialic acids and the cancer-associated sialyl-Tn (STn) glycoform. We demonstrate that binding of Siglec-15 to T cells, which lack STn expression, depends on the presence of α(2,3)- and α(2,6)-linked sialoglycans. Furthermore, we identify the leukocyte integrin CD11b as a Siglec-15 binding partner on human T cells. Collectively, our findings provide an integrated understanding of the structural features of Siglec-15 and emphasize glycosylation as a crucial factor in controlling T cell responses.
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Affiliation(s)
- Maria Pia Lenza
- Chemical Glycobiology lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Bizkaia, Spain
| | - Leire Egia-Mendikute
- Cancer Immunology and Immunotherapy Lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 801A, 48160, Derio, Bizkaia, Spain
| | - Asier Antoñana-Vildosola
- Cancer Immunology and Immunotherapy Lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 801A, 48160, Derio, Bizkaia, Spain
| | - Cátia O Soares
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, NOVA School of Science and Technology, Caparica campus, 2829-516, Caparica, Portugal
- UCIBIO, Department of Chemistry, NOVA School of Science and Technology, Caparica campus, 2829-516, Caparica, Portugal
| | - Helena Coelho
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, NOVA School of Science and Technology, Caparica campus, 2829-516, Caparica, Portugal
- UCIBIO, Department of Chemistry, NOVA School of Science and Technology, Caparica campus, 2829-516, Caparica, Portugal
| | - Francisco Corzana
- Department of Chemistry, University of La Rioja, The Center for Research in Chemical Synthesis, Madre de Dios 53, E-26006, Logroño, Spain
| | - Alexandre Bosch
- Cancer Immunology and Immunotherapy Lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 801A, 48160, Derio, Bizkaia, Spain
| | - Prodhi Manisha
- Cancer Immunology and Immunotherapy Lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 801A, 48160, Derio, Bizkaia, Spain
| | - Jon Imanol Quintana
- Chemical Glycobiology lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Bizkaia, Spain
| | - Iker Oyenarte
- Chemical Glycobiology lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Bizkaia, Spain
| | - Luca Unione
- Chemical Glycobiology lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Bizkaia, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao, Spain
| | - María Jesús Moure
- Chemical Glycobiology lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Bizkaia, Spain
| | - Mikel Azkargorta
- Proteomics Platform, CIC bioGUNE, CIBERehd, Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Spain
| | - Unai Atxabal
- Chemical Glycobiology lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Bizkaia, Spain
| | - Klaudia Sobczak
- Chemical Glycobiology lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Bizkaia, Spain
| | - Felix Elortza
- Proteomics Platform, CIC bioGUNE, CIBERehd, Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Spain
| | - James D Sutherland
- Ubiquitin-likes and Development Lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 801A, 48160, Derio, Bizkaia, Spain
| | - Rosa Barrio
- Ubiquitin-likes and Development Lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 801A, 48160, Derio, Bizkaia, Spain
| | - Filipa Marcelo
- Associate Laboratory i4HB-Institute for Health and Bioeconomy, NOVA School of Science and Technology, Caparica campus, 2829-516, Caparica, Portugal
- UCIBIO, Department of Chemistry, NOVA School of Science and Technology, Caparica campus, 2829-516, Caparica, Portugal
| | - Jesús Jiménez-Barbero
- Chemical Glycobiology lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Bizkaia, Spain.
- Ikerbasque, Basque Foundation for Science, Bilbao, Spain.
- Department of Organic & Inorganic Chemistry, Faculty of Science and Technology, University of the Basque Country, EHU-UPV, 48940, Leioa, Bizkaia, Spain.
- Centro de Investigacion Biomedica En Red de Enfermedades Respiratorias, 28029, Madrid, Spain.
| | - Asis Palazon
- Cancer Immunology and Immunotherapy Lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 801A, 48160, Derio, Bizkaia, Spain.
- Ikerbasque, Basque Foundation for Science, Bilbao, Spain.
| | - June Ereño-Orbea
- Chemical Glycobiology lab, Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160, Derio, Bizkaia, Spain.
- Ikerbasque, Basque Foundation for Science, Bilbao, Spain.
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12
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CD33 isoforms in microglia and Alzheimer's disease: Friend and foe. Mol Aspects Med 2023; 90:101111. [PMID: 35940942 DOI: 10.1016/j.mam.2022.101111] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 07/18/2022] [Accepted: 07/27/2022] [Indexed: 02/08/2023]
Abstract
Alzheimer's disease (AD) is the most common form of neurodegenerative disease and is considered the main cause of dementia worldwide. Genome-wide association studies combined with integrated analysis of functional datasets support a critical role for microglia in AD pathogenesis, identifying them as important potential therapeutic targets. The ability of immunomodulatory receptors on microglia to control the response to pathogenic amyloid-β aggregates has gained significant interest. Siglec-3, also known as CD33, is one of these immunomodulatory receptors expressed on microglia that has been identified as an AD susceptibility factor. Here, we review recent advances made in understanding the multifaceted roles that CD33 plays in microglia with emphasis on two human-specific CD33 isoforms that differentially correlate with AD susceptibility. We also describe several different therapeutic approaches for targeting CD33 that have been advanced for the purpose of skewing microglial cell responses.
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13
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Gonzalez-Gil A, Li TA, Kim J, Schnaar RL. Human sialoglycan ligands for immune inhibitory Siglecs. Mol Aspects Med 2023; 90:101110. [PMID: 35965135 DOI: 10.1016/j.mam.2022.101110] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/26/2022] [Accepted: 07/27/2022] [Indexed: 02/08/2023]
Abstract
Most human Siglecs (sialic acid binding immunoglobulin-like lectins) are expressed on the surfaces of overlapping subsets of immune cells, and most carry immunoreceptor tyrosine-based inhibitory domains on their intracellular motifs. When immune inhibitory Siglecs bind to complementary sialoglycans in their local milieu, engagement results in down-regulation of the immune response. Siglecs have come under scrutiny as potential targets of drugs to modify the course of inflammation (and other immune system responses) and as immune checkpoints in cancer. Human Siglecs bind to endogenous human sialoglycans. The identities of these endogenous human sialoglycan immune regulators are beginning to emerge, along with some general principles that may inform future investigations in this area. Among these principles is the finding that a cell type or tissue may express a ligand for a particular Siglec on a single or a very few of its sialoglycoproteins. The selected protein carrier for a particular Siglec may be unique in a certain tissue, but vary tissue-to-tissue. The binding affinity of endogenous Siglec ligands may surpass that of its binding to synthetic sialoglycan determinants by several orders of magnitude. Since most human Siglecs have evolved rapidly and are distinct from those in most other mammals, this review describes endogenous human Siglec ligands for several human immune inhibitory Siglecs. As the identities of these immune regulatory sialoglycan ligands are defined, additional opportunities to target Siglecs therapeutically may emerge.
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Affiliation(s)
- Anabel Gonzalez-Gil
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
| | - T August Li
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
| | - Jean Kim
- Department Medicine, Division of Allergy and Clinical Immunology, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA; Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA.
| | - Ronald L Schnaar
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA; Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
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14
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Liu G, Hao M, Zeng B, Liu M, Wang J, Sun S, Liu C, Huilian C. Sialic acid and food allergies: The link between nutrition and immunology. Crit Rev Food Sci Nutr 2022; 64:3880-3906. [PMID: 36369942 DOI: 10.1080/10408398.2022.2136620] [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] [Indexed: 11/15/2022]
Abstract
Food allergies (FA), a major public health problem recognized by the World Health Organization, affect an estimated 3%-10% of adults and 8% of children worldwide. However, effective treatments for FA are still lacking. Recent advances in glycoimmunology have demonstrated the great potential of sialic acids (SAs) in the treatment of FA. SAs are a group of nine-carbon α-ketoacids usually linked to glycoproteins and glycolipids as terminal glycans. They play an essential role in modulating immune responses and may be an effective target for FA intervention. As exogenous food components, sialylated polysaccharides have anti-FA effects. In contrast, as endogenous components, SAs on immunoglobulin E and immune cell surfaces contribute to the pathogenesis of FA. Given the lack of comprehensive information on the effects of SAs on FA, we reviewed the roles of endogenous and exogenous SAs in the pathogenesis and treatment of FA. In addition, we considered the structure-function relationship of SAs to provide a theoretical basis for the development of SA-based FA treatments.
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Affiliation(s)
- Guirong Liu
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Mengzhen Hao
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Binghui Zeng
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Manman Liu
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Junjuan Wang
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Shanfeng Sun
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
| | - Changqi Liu
- School of Exercise and Nutritional Sciences, College of Health and Human Services, San Diego State University, California, United States of America
| | - Che Huilian
- Key Laboratory of Precision Nutrition and Food Quality, Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
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15
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Reyes CDG, Hakim MA, Atashi M, Goli M, Gautam S, Wang J, Bennett AI, Zhu J, Lubman DM, Mechref Y. LC-MS/MS Isomeric Profiling of N-Glycans Derived from Low-Abundant Serum Glycoproteins in Mild Cognitive Impairment Patients. Biomolecules 2022; 12:1657. [PMID: 36359007 PMCID: PMC9687829 DOI: 10.3390/biom12111657] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/03/2022] [Accepted: 11/04/2022] [Indexed: 09/29/2023] Open
Abstract
Mild cognitive impairment (MCI) is an early stage of memory loss that affects cognitive abilities, such as language or virtual/spatial comprehension. This cognitive decline is mostly observed with the aging of individuals. Recently, MCI has been considered as a prodromal phase of Alzheimer's disease (AD), with a 10-15% conversion rate. However, the existing diagnostic methods fail to provide precise and well-timed diagnoses, and the pathophysiology of MCI is not fully understood. Alterations of serum N-glycan expression could represent essential contributors to the overall pathophysiology of neurodegenerative diseases and be used as a potential marker to assess MCI diagnosis using non-invasive procedures. Herein, we undertook an LC-MS/MS glycomics approach to determine and characterize potential N-glycan markers in depleted blood serum samples from MCI patients. For the first time, we profiled the isomeric glycome of the low abundant serum glycoproteins extracted from serum samples of control and MCI patients using an LC-MS/MS analytical strategy. Additionally, the MRM validation of the identified data showed five isomeric N-glycans with the ability to discriminate between healthy and MCI patients: the sialylated N-glycans GlcNAc5,Hex6,Neu5Ac3 and GlcNAc6,Hex7,Neu5Ac4 with single AUCs of 0.92 and 0.87, respectively, and a combined AUC of 0.96; and the sialylated-fucosylated N-glycans GlcNAc4,Hex5,Fuc,Neu5Ac, GlcNAc5,Hex6,Fuc,Neu5Ac2, and GlcNAc6,Hex7,Fuc,Neu5Ac3 with single AUCs of 0.94, 0.67, and 0.88, respectively, and a combined AUC of 0.98. According to the ingenuity pathway analysis (IPA) and in line with recent publications, the identified N-glycans may play an important role in neuroinflammation. It is a process that plays a fundamental role in neuroinflammation, an important process in the progression of neurodegenerative diseases.
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Affiliation(s)
| | - Md. Abdul Hakim
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA
| | - Mojgan Atashi
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA
| | - Mona Goli
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA
| | - Sakshi Gautam
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA
| | - Junyao Wang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA
| | - Andrew I. Bennett
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA
| | - Jianhui Zhu
- Department of Surgery, The University of Michigan, Ann Arbor, MI 48109, USA
| | - David M. Lubman
- Department of Surgery, The University of Michigan, Ann Arbor, MI 48109, USA
| | - Yehia Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA
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16
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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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17
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Mondello S, Sandner V, Goli M, Czeiter E, Amrein K, Kochanek PM, Gautam S, Cho BG, Morgan R, Nehme A, Fiumara G, Eid AH, Barsa C, Haidar MA, Buki A, Kobeissy FH, Mechref Y. Exploring serum glycome patterns after moderate to severe traumatic brain injury: A prospective pilot study. EClinicalMedicine 2022; 50:101494. [PMID: 35755600 PMCID: PMC9218141 DOI: 10.1016/j.eclinm.2022.101494] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 05/09/2022] [Accepted: 05/18/2022] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Glycans play essential functional roles in the nervous system and their pathobiological relevance has become increasingly recognized in numerous brain disorders, but not fully explored in traumatic brain injury (TBI). We investigated longitudinal glycome patterns in patients with moderate to severe TBI (Glasgow Coma Scale [GCS] score ≤12) to characterize glyco-biomarker signatures and their relation to clinical features and long-term outcome. METHODS This prospective single-center observational study included 51 adult patients with TBI (GCS ≤12) admitted to the neurosurgical unit of the University Hospital of Pecs, Pecs, Hungary, between June 2018 and April 2019. We used a high-throughput liquid chromatography-tandem mass spectrometry platform to assess serum levels of N-glycans up to 3 days after injury. Outcome was assessed using the Glasgow Outcome Scale-Extended (GOS-E) at 12 months post-injury. Multivariate statistical techniques, including principal component analysis and orthogonal partial least squares discriminant analysis, were used to analyze glycomics data and define highly influential structures driving class distinction. Receiver operating characteristic analyses were used to determine prognostic accuracy. FINDINGS We identified 94 N-glycans encompassing all typical structural types, including oligomannose, hybrid, and complex-type entities. Levels of high mannose, hybrid and sialylated structures were temporally altered (p<0·05). Four influential glycans were identified. Two brain-specific structures, HexNAc5Hex3DeoxyHex0NeuAc0 and HexNAc5Hex4DeoxyHex0NeuAc1, were substantially increased early after injury in patients with unfavorable outcome (GOS-E≤4) (area under the curve [AUC]=0·75 [95%CI 0·59-0·90] and AUC=0·71 [0·52-0·89], respectively). Serum levels of HexNAc7Hex7DeoxyHex1NeuAc2 and HexNAc8Hex6DeoxyHex0NeuAc0 were persistently increased in patients with favorable outcome, but undetectable in those with unfavorable outcome. Levels of HexNAc5Hex4DeoxyHex0NeuAc1 were acutely elevated in patients with mass lesions and in those requiring decompressive craniectomy. INTERPRETATION In spite of the exploratory nature of the study and the relatively small number of patients, our results provide to the best of our knowledge initial evidence supporting the utility of glycomics approaches for biomarker discovery and patient phenotyping in TBI. Further larger multicenter studies will be required to validate our findings and to determine their pathobiological value and potential applications in practice. FUNDING This work was funded by the Italian Ministry of Health (grant number GR-2013-02354960), and also partially supported by a NIH grant (1R01GM112490-08).
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Affiliation(s)
- Stefania Mondello
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy
- Corresponding author.
| | - Viktor Sandner
- Sartorius Data Analytics, Sartorius Stedim Austria GmbH, 1030 Vienna, Austria
| | - Mona Goli
- Department of Chemistry and Biochemistry, Texas Tech University, Box 41061, Lubbock, TX 79409-1061, USA
| | - Endre Czeiter
- Department of Neurosurgery, University of Pécs, H-7623 Pécs, Hungary
- Neurotrauma Research Group, Szentágothai Research Centre, University of Pécs, H-7624 Pécs, Hungary
- MTA-PTE Clinical Neuroscience MR Research Group, H-7623 Pécs, Hungary
| | - Krisztina Amrein
- Department of Neurosurgery, University of Pécs, H-7623 Pécs, Hungary
- Neurotrauma Research Group, Szentágothai Research Centre, University of Pécs, H-7624 Pécs, Hungary
- MTA-PTE Clinical Neuroscience MR Research Group, H-7623 Pécs, Hungary
| | - Patrick M. Kochanek
- Departments of Critical Care Medicine, Pediatrics, Anesthesiology, and Clinical and Translational Science, University of Pittsburgh School of Medicine, and UPMC Children's Hospital of Pittsburgh, Pittsburgh 15224, USA
| | - Sakshi Gautam
- Department of Chemistry and Biochemistry, Texas Tech University, Box 41061, Lubbock, TX 79409-1061, USA
| | - Byeong Gwan Cho
- Department of Chemistry and Biochemistry, Texas Tech University, Box 41061, Lubbock, TX 79409-1061, USA
| | - Ryan Morgan
- Department of Chemistry and Biochemistry, Texas Tech University, Box 41061, Lubbock, TX 79409-1061, USA
| | - Ali Nehme
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy
| | - Giacomo Fiumara
- Department of Mathematical and Computer Science, Physical Sciences and Earth Sciences, University of Messina, 98100 Messina, Italy
| | - Ali H. Eid
- Department of Biochemistry and Molecular Genetics, American University of Beirut, 1107-2020 Beirut, Lebanon
- Department of Basic Medical Sciences, College of Medicine, QU Health, Qatar University, Doha, Qatar
| | - Chloe Barsa
- Department of Biochemistry and Molecular Genetics, American University of Beirut, 1107-2020 Beirut, Lebanon
| | - Muhammad Ali Haidar
- Department of Biochemistry and Molecular Genetics, American University of Beirut, 1107-2020 Beirut, Lebanon
| | - Andras Buki
- Department of Neurosurgery, University of Pécs, H-7623 Pécs, Hungary
- Neurotrauma Research Group, Szentágothai Research Centre, University of Pécs, H-7624 Pécs, Hungary
- MTA-PTE Clinical Neuroscience MR Research Group, H-7623 Pécs, Hungary
| | - Firas H. Kobeissy
- Department of Biochemistry and Molecular Genetics, American University of Beirut, 1107-2020 Beirut, Lebanon
- Department of Psychiatry and Neuroscience, McKnight Brain Institute, University of Florida, Gainesville, FL 32610, USA
| | - Yehia Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Box 41061, Lubbock, TX 79409-1061, USA
- Corresponding author.
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18
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Anwar MT, Adak AK, Kawade SK, Wu HR, Angata T, Lin CC. Combining CuAAC reaction enables sialylated Bi- and triantennary pseudo mannose N-glycans for investigating Siglec-7 interactions. Bioorg Med Chem 2022; 67:116839. [PMID: 35640379 DOI: 10.1016/j.bmc.2022.116839] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 11/02/2022]
Abstract
Naturally occurring N-glycans display much diversity in modifications, linkages, and peripheral presentation of the oligosaccharide chain. Despite continued advancements in oligosaccharide synthesis, synthetic access to these natural glycans remains challenging. Biologically relevant complex N-glycan mimetics with various natural and unnatural modifications are an alternate way for investigating glycan-protein interactions. Further supporting this pattern, we report here a new class of sialylated bi- and triantennary pseudo mannose N-glycans reproducing orientation of the underlying glycan chain and branching patterns and replacing the two inner mannopyranosyl units with 1,2,3-triazole rings. Such mimetics are straightforwardly generated by implementing multiple intermolecular Cu(I)-catalyzed azide-alkyne cycloaddition between chemoenzymatically synthesized azido sialosides and rationally designed C-3 and C-6 di-O- or C-2, C-3, and C-6 tri-O-alkynylated mannoside. Human recombinant Siglec-7-Fc fusion protein recognizes almost all sialylated pseudo mannose N-glycans in the microarray. However, a differential Sia-binding pattern was also observed. Given the library size, comparison of pairwise mannose N-glycan combinations showed that biantennary linear α(2,3)α(2,8)- and α(2,6)α(2,8)- or branched α(2,3)α(2,6)-, and triantennary branched α(2,3)α(2,6)-sialyl pseudo N-glycans possess similar binding capabilities and affinity to recombinant Siglec-7-Fc. While the full range of topological mannose arms remain elusive, the bi- and triantennary mimics are simpler structures for interrogating Siglec interactions.
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Affiliation(s)
| | - Avijit K Adak
- Department of Chemistry, National Tsing Hua University, Hsinchu 30044, Taiwan
| | - Sachin Kisan Kawade
- Department of Chemistry, National Tsing Hua University, Hsinchu 30044, Taiwan
| | - Hsin-Ru Wu
- Instrumentation Center, National Tsing Hua University, Hsinchu 30044, Taiwan
| | - Takashi Angata
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan
| | - Chun-Cheng Lin
- Department of Chemistry, National Tsing Hua University, Hsinchu 30044, Taiwan; Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
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19
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Erickson JJ, Archer-Hartmann S, Yarawsky AE, Miller JLC, Seveau S, Shao TY, Severance AL, Miller-Handley H, Wu Y, Pham G, Wasik BR, Parrish CR, Hu YC, Lau JTY, Azadi P, Herr AB, Way SS. Pregnancy enables antibody protection against intracellular infection. Nature 2022; 606:769-775. [PMID: 35676476 PMCID: PMC9233044 DOI: 10.1038/s41586-022-04816-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 04/27/2022] [Indexed: 12/17/2022]
Abstract
Adaptive immune components are thought to exert non-overlapping roles in antimicrobial host defence, with antibodies targeting pathogens in the extracellular environment and T cells eliminating infection inside cells1,2. Reliance on antibodies for vertically transferred immunity from mothers to babies may explain neonatal susceptibility to intracellular infections3,4. Here we show that pregnancy-induced post-translational antibody modification enables protection against the prototypical intracellular pathogen Listeria monocytogenes. Infection susceptibility was reversed in neonatal mice born to preconceptually primed mothers possessing L. monocytogenes-specific IgG or after passive transfer of antibodies from primed pregnant, but not virgin, mice. Although maternal B cells were essential for producing IgGs that mediate vertically transferred protection, they were dispensable for antibody acquisition of protective function, which instead required sialic acid acetyl esterase5 to deacetylate terminal sialic acid residues on IgG variable-region N-linked glycans. Deacetylated L. monocytogenes-specific IgG protected neonates through the sialic acid receptor CD226,7, which suppressed IL-10 production by B cells leading to antibody-mediated protection. Consideration of the maternal-fetal dyad as a joined immunological unit reveals protective roles for antibodies against intracellular infection and fine-tuned adaptations to enhance host defence during pregnancy and early life.
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Affiliation(s)
- John J Erickson
- Department of Pediatrics, Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
- Department of Pediatrics, Division of Neonatology, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | | | - Alexander E Yarawsky
- Department of Pediatrics, Division of Immunobiology, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | - Jeanette L C Miller
- Department of Pediatrics, Division of Immunobiology, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | - Stephanie Seveau
- Department of Microbial Infection and Immunity, Ohio State University, Columbus, OH, USA
| | - Tzu-Yu Shao
- Department of Pediatrics, Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | - Ashley L Severance
- Department of Pediatrics, Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | - Hilary Miller-Handley
- Department of Pediatrics, Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
- Department of Internal Medicine, Division of Infectious Diseases, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | - Yuehong Wu
- Department of Pediatrics, Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | - Giang Pham
- Department of Pediatrics, Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | - Brian R Wasik
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Colin R Parrish
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Yueh-Chiang Hu
- Department of Pediatrics, Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | - Joseph T Y Lau
- Department of Molecular and Cell Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Parastoo Azadi
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA, USA
| | - Andrew B Herr
- Department of Pediatrics, Division of Immunobiology, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA
| | - Sing Sing Way
- Department of Pediatrics, Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati School of Medicine, Cincinnati, OH, USA.
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20
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Naito-Matsui Y. Physiological Significance of Animal- and Tissue-specific Sialic Acid Composition. TRENDS GLYCOSCI GLYC 2022. [DOI: 10.4052/tigg.2036.1j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Naito-Matsui Y. Physiological Significance of Animal- and Tissue-specific Sialic Acid Composition. TRENDS GLYCOSCI GLYC 2022. [DOI: 10.4052/tigg.2036.1e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Siyabalapitiya Arachchige S, Crich D. Syntheses of Legionaminic Acid, Pseudaminic Acid, Acetaminic Acid, 8- epi-Acetaminic Acid, and 8- epi-Legionaminic Acid Glycosyl Donors from N-Acetylneuraminic Acid by Side Chain Exchange. Org Lett 2022; 24:2998-3002. [PMID: 35420827 PMCID: PMC9066425 DOI: 10.1021/acs.orglett.2c00894] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Metaperiodate cleavage of the glycerol side chain from an N-acetyl neuraminic acid-derived thioglycoside and condensation with the two enantiomers of the Ellman sulfinamide afford two diastereomeric N-sulfinylimines from which bacterial sialic acid donors with the legionaminic and acetaminic acid configurations and their 8-epi-isomers are obtained by samarium iodide-mediated coupling with acetaldehyde and subsequent manipulations. A variation on the theme, with inversion of the configuration at C5, similarly provides two differentially protected pseudaminic acid donors.
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Affiliation(s)
- Sameera Siyabalapitiya Arachchige
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States.,Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, Georgia 30602, United States.,Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
| | - David Crich
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States.,Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, Georgia 30602, United States.,Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
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23
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Transgenic mouse models to study the physiological and pathophysiological roles of human Siglecs. Biochem Soc Trans 2022; 50:935-950. [PMID: 35383825 DOI: 10.1042/bst20211203] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/14/2022] [Accepted: 03/18/2022] [Indexed: 12/14/2022]
Abstract
Sialic acid-binding immunoglobulin-like lectins (Siglecs) are important immunomodulatory receptors. Due to differences between human and mouse Siglecs, defining the in vivo roles for human Siglecs (hSiglecs) can be challenging. One solution is the development and use of hSiglec transgenic mice to assess the physiological roles of hSiglecs in health and disease. These transgenic mice can also serve as important models for the pre-clinical testing of immunomodulatory approaches that are based on targeting hSiglecs. Four general methods have been used to create hSiglec-expressing transgenic mice, each with associated advantages and disadvantages. To date, transgenic mouse models expressing hSiglec-2 (CD22), -3 (CD33), -7, -8, -9, -11, and -16 have been created. This review focuses on both the generation of these hSiglec transgenic mice, along with the important findings that have been made through their study. Cumulatively, hSiglec transgenic mouse models are providing a deeper understanding of the differences between human and mice orthologs/paralogs, mechanisms by which Siglecs regulate immune cell signaling, physiological roles of Siglecs in disease, and different paradigms where targeting Siglecs may be therapeutically advantageous.
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24
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Ishida T, Nagao M, Oh T, Mori T, Hsohino Y, Miura Y. Synthesis of Glycopolymers Carrying 3’-Sialyllactose for Suppressing Inflammatory Reaction via Siglec-E. CHEM LETT 2022. [DOI: 10.1246/cl.210740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Takato Ishida
- Department of Chemical Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395
| | - Masanori Nagao
- Department of Chemical Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395
| | - Takahiro Oh
- Department of Chemical Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395
| | - Takeshi Mori
- Department of Applied Chemistry, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395
| | - Yu Hsohino
- Department of Chemical Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395
| | - Yoshiko Miura
- Department of Chemical Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka 819-0395
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25
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Coltoff AR, Jurcic JG. Targeted radionuclide therapy of hematologic malignancies. Nucl Med Mol Imaging 2022. [DOI: 10.1016/b978-0-12-822960-6.00117-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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26
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Kobiela A, Frackowiak JE, Biernacka A, Hovhannisyan L, Bogucka AE, Panek K, Paul AA, Lukomska J, Wang X, Giannoulatou E, Krolicka A, Zielinski J, Deptula M, Pikula M, Gabrielsson S, Ogg GS, Gutowska-Owsiak D. Exposure of Keratinocytes to Candida Albicans in the Context of Atopic Milieu Induces Changes in the Surface Glycosylation Pattern of Small Extracellular Vesicles to Enhance Their Propensity to Interact With Inhibitory Siglec Receptors. Front Immunol 2022; 13:884530. [PMID: 35784319 PMCID: PMC9248261 DOI: 10.3389/fimmu.2022.884530] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 05/02/2022] [Indexed: 12/13/2022] Open
Abstract
Candida albicans (C. albicans) infection is a potential complication in the individuals with atopic dermatitis (AD) and can affect clinical course of the disease. Here, using primary keratinocytes we determined that atopic milieu promotes changes in the interaction of small extracellular vesicles (sEVs) with dendritic cells and that this is further enhanced by the presence of C. albicans. sEV uptake is largely dependent on the expression of glycans on their surface; modelling of the protein interactions indicated that recognition of this pathogen through C. albicans-relevant pattern recognition receptors (PRRs) is linked to several glycosylation enzymes which may in turn affect the expression of sEV glycans. Here, significant changes in the surface glycosylation pattern, as determined by lectin array, could be observed in sEVs upon a combined exposure of keratinocytes to AD cytokines and C. albicans. This included enhanced expression of multiple types of glycans, for which several dendritic cell receptors could be proposed as binding partners. Blocking experiments showed predominant involvement of the inhibitory Siglec-7 and -9 receptors in the sEV-cell interaction and the engagement of sialic acid-containing carbohydrate moieties on the surface of sEVs. This pointed on ST6 β-Galactoside α-2,6-Sialyltransferase 1 (ST6GAL1) and Core 1 β,3-Galactosyltransferase 1 (C1GALT1) as potential enzymes involved in the process of remodelling of the sEV surface glycans upon C. albicans exposure. Our results suggest that, in combination with atopic dermatitis milieu, C. albicans promotes alterations in the glycosylation pattern of keratinocyte-derived sEVs to interact with inhibitory Siglecs on antigen presenting cells. Hence, a strategy aiming at this pathway to enhance antifungal responses and restrict pathogen spread could offer novel therapeutic options for skin candidiasis in AD.
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Affiliation(s)
- Adrian Kobiela
- Experimental and Translational Immunology Group, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Joanna E Frackowiak
- Experimental and Translational Immunology Group, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Anna Biernacka
- Experimental and Translational Immunology Group, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Lilit Hovhannisyan
- Experimental and Translational Immunology Group, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Aleksandra E Bogucka
- The Mass Spectrometry Laboratory, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, Gdansk, Poland
| | - Kinga Panek
- Experimental and Translational Immunology Group, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Argho Aninda Paul
- Experimental and Translational Immunology Group, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Joanna Lukomska
- Experimental and Translational Immunology Group, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Xinwen Wang
- State Key Laboratory of Military Stomatology, Department of Oral Medicine, School of Stomatology, The Fourth Military Medical University, Xi'an, China.,Medical Research Council (MRC) Human Immunology Unit, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine, National Institute for Health Research (NIHR) Oxford Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Eleni Giannoulatou
- Computational Biology Research Group, Weatherall Institute of Molecular Medicine (WIMM), University of Oxford, Oxford, United Kingdom
| | - Aleksandra Krolicka
- Laboratory of Biologically Active Compounds, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Jacek Zielinski
- Department of Surgical Oncology, Medical University of Gdansk, Gdansk, Poland
| | - Milena Deptula
- Experimental and Translational Immunology Group, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland.,Laboratory of Tissue Engineering and Regenerative Medicine, Department of Embryology, Medical University of Gdansk, Gdansk, Poland
| | - Michal Pikula
- Laboratory of Tissue Engineering and Regenerative Medicine, Department of Embryology, Medical University of Gdansk, Gdansk, Poland
| | - Susanne Gabrielsson
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Graham S Ogg
- Medical Research Council (MRC) Human Immunology Unit, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine, National Institute for Health Research (NIHR) Oxford Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Danuta Gutowska-Owsiak
- Experimental and Translational Immunology Group, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland.,Medical Research Council (MRC) Human Immunology Unit, Medical Research Council (MRC) Weatherall Institute of Molecular Medicine, National Institute for Health Research (NIHR) Oxford Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
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27
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Oinam L, Tateno H. Evaluation of Glycan-Binding Specificity by Glycoconjugate Microarray with an Evanescent-Field Fluorescence Detection System. Methods Mol Biol 2022; 2460:25-32. [PMID: 34972928 DOI: 10.1007/978-1-0716-2148-6_2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Glycan microarray is an essential tool to study glycan-binding proteins called lectins. Using glycan microarrays, glycan-binding specificity can be analyzed by incubation with an array in which a series of glycans are immobilized. Various research groups in the world have developed glycan microarray. Among them, our glycan microarray has two unique points: one is the incorporation of the evanescent-field fluorescence detection system, and another is the use of multivalent glycopolymers. These two unique properties allow high-sensitive detection from a relatively limited amount of only nanograms of lectins, which could even be applied in crude samples such as cell lysates and cell culture media. Thus, this system is suitable for the first screening of lectins, lectin-like molecules, lectin candidates, and lectin mutants. Here we describe the protocols to analyze glycan-binding specificity of lectins using our glycan microarray system.
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Affiliation(s)
- Lalhaba Oinam
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Hiroaki Tateno
- Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan.
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28
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Sugar nucleotide regeneration system for the synthesis of Bi- and triantennary N-glycans and exploring their activities against siglecs. Eur J Med Chem 2022; 232:114146. [DOI: 10.1016/j.ejmech.2022.114146] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/17/2022] [Accepted: 01/17/2022] [Indexed: 11/18/2022]
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29
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van Houtum EJH, Büll C, Cornelissen LAM, Adema GJ. Siglec Signaling in the Tumor Microenvironment. Front Immunol 2021; 12:790317. [PMID: 34966391 PMCID: PMC8710542 DOI: 10.3389/fimmu.2021.790317] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 11/23/2021] [Indexed: 12/16/2022] Open
Abstract
Sialic acid-binding immunoglobulin-like lectins (Siglecs) are a family of receptors that recognize sialoglycans - sialic acid containing glycans that are abundantly present on cell membranes. Siglecs are expressed on most immune cells and can modulate their activity and function. The majority of Siglecs contains immune inhibitory motifs comparable to the immune checkpoint receptor PD-1. In the tumor microenvironment (TME), signaling through the Siglec-sialoglycan axis appears to be enhanced through multiple mechanisms favoring tumor immune evasion similar to the PD-1/PD-L1 signaling pathway. Siglec expression on tumor-infiltrating immune cells appears increased in the immune suppressive microenvironment. At the same time, enhanced Siglec ligand expression has been reported for several tumor types as a result of aberrant glycosylation, glycan modifications, and the increased expression of sialoglycans on proteins and lipids. Siglec signaling has been identified as important regulator of anti-tumor immunity in the TME, but the key factors contributing to Siglec activation by tumor-associated sialoglycans are diverse and poorly defined. Among others, Siglec activation and signaling are co-determined by their expression levels, cell surface distribution, and their binding preferences for cis- and trans-ligands in the TME. Siglec binding preference are co-determined by the nature of the proteins/lipids to which the sialoglycans are attached and the multivalency of the interaction. Here, we review the current understanding and emerging conditions and factors involved in Siglec signaling in the TME and identify current knowledge gaps that exist in the field.
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Affiliation(s)
- Eline J. H. van Houtum
- Radiotherapy & OncoImmunology Laboratory, Department of Radiation Oncology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Christian Büll
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW), Utrecht, Netherlands
- Copenhagen Center for Glycomics, Departments of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Lenneke A. M. Cornelissen
- Radiotherapy & OncoImmunology Laboratory, Department of Radiation Oncology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Gosse J. Adema
- Radiotherapy & OncoImmunology Laboratory, Department of Radiation Oncology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
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30
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Hitchcock CL, Povoski SP, Mojzisik CM, Martin EW. Survival Advantage Following TAG-72 Antigen-Directed Cancer Surgery in Patients With Colorectal Carcinoma: Proposed Mechanisms of Action. Front Oncol 2021; 11:731350. [PMID: 34950576 PMCID: PMC8688248 DOI: 10.3389/fonc.2021.731350] [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: 06/26/2021] [Accepted: 10/25/2021] [Indexed: 12/09/2022] Open
Abstract
Patients with colorectal carcinoma (CRC) continue to have variable clinical outcomes despite undergoing the same surgical procedure with curative intent and having the same pathologic and clinical stage. This problem suggests the need for better techniques to assess the extent of disease during surgery. We began to address this problem 35 years ago by injecting patients with either primary or recurrent CRC with 125I-labeled murine monoclonal antibodies against the tumor-associated glycoprotein-72 (TAG-72) and using a handheld gamma-detecting probe (HGDP) for intraoperative detection and removal of radioactive, i.e., TAG-72-positive, tissue. Data from these studies demonstrated a significant difference in overall survival data (p < 0.005 or better) when no TAG-72-positive tissue remained compared to when TAG-72-positive tissue remained at the completion of surgery. Recent publications indicate that aberrant glycosylation of mucins and their critical role in suppressing tumor-associated immune response help to explain the cellular mechanisms underlying our results. We propose that monoclonal antibodies to TAG-72 recognize and bind to antigenic epitopes on mucins that suppress the tumor-associated immune response in both the tumor and tumor-draining lymph nodes. Complete surgical removal of all TAG-72-positive tissue serves to reverse the escape phase of immunoediting, allowing a resetting of this response that leads to improved overall survival of the patients with either primary or recurrent CRC. Thus, the status of TAG-72 positivity after resection has a significant impact on patient survival.
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Affiliation(s)
- Charles L. Hitchcock
- Department of Pathology, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Stephen P. Povoski
- Division of Surgical Oncology, Department of Surgery, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Cathy M. Mojzisik
- Division of Surgical Oncology, Department of Surgery, College of Medicine, The Ohio State University, Columbus, OH, United States
| | - Edward W. Martin
- Division of Surgical Oncology, Department of Surgery, College of Medicine, The Ohio State University, Columbus, OH, United States
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31
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Jung J, Enterina JR, Bui DT, Mozaneh F, Lin PH, Nitin, Kuo CW, Rodrigues E, Bhattacherjee A, Raeisimakiani P, Daskhan GC, St. Laurent CD, Khoo KH, Mahal LK, Zandberg WF, Huang X, Klassen JS, Macauley MS. Carbohydrate Sulfation As a Mechanism for Fine-Tuning Siglec Ligands. ACS Chem Biol 2021; 16:2673-2689. [PMID: 34661385 DOI: 10.1021/acschembio.1c00501] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The immunomodulatory family of Siglecs recognizes sialic acid-containing glycans as "self", which is exploited in cancer for immune evasion. The biochemical nature of Siglec ligands remains incompletely understood, with emerging evidence suggesting the importance of carbohydrate sulfation. Here, we investigate how specific sulfate modifications affect Siglec ligands by overexpressing eight carbohydrate sulfotransferases (CHSTs) in five cell lines. Overexpression of three CHSTs─CHST1, CHST2, or CHST4─significantly enhance the binding of numerous Siglecs. Unexpectedly, two other CHSTs (Gal3ST2 and Gal3ST3) diminish Siglec binding, suggesting a new mode to modulate Siglec ligands via sulfation. Results are cell type dependent, indicating that the context in which sulfated glycans are presented is important. Moreover, a pharmacological blockade of N- and O-glycan maturation reveals a cell-type-specific pattern of importance for either class of glycan. Production of a highly homogeneous Siglec-3 (CD33) fragment enabled a mass-spectrometry-based binding assay to determine ≥8-fold and ≥2-fold enhanced affinity for Neu5Acα2-3(6-O-sulfo)Galβ1-4GlcNAc and Neu5Acα2-3Galβ1-4(6-O-sulfo)GlcNAc, respectively, over Neu5Acα2-3Galβ1-4GlcNAc. CD33 shows significant additivity in affinity (≥28-fold) for the disulfated ligand, Neu5Acα2-3(6-O-sulfo)Galβ1-4(6-O-sulfo)GlcNAc. Moreover, joint overexpression of CHST1 with CHST2 in cells greatly enhanced the binding of CD33 and several other Siglecs. Finally, we reveal that CHST1 is upregulated in numerous cancers, correlating with poorer survival rates and sodium chlorate sensitivity for the binding of Siglecs to cancer cell lines. These results provide new insights into carbohydrate sulfation as a general mechanism for tuning Siglec ligands on cells, including in cancer.
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Affiliation(s)
- Jaesoo Jung
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Canada
| | - Jhon R. Enterina
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, T6G 2J7, Canada
| | - Duong T. Bui
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Canada
| | - Fahima Mozaneh
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Canada
| | - Po-Han Lin
- Departments of Chemistry and Biomedical Engineering, Michigan State University, East Lansing, Michigan 48824, United States
| | - Nitin
- Department of Chemistry, The University of British Columbia, Kelowna, V1V 1V7, Canada
| | - Chu-Wei Kuo
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Emily Rodrigues
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Canada
| | | | | | - Gour C. Daskhan
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Canada
| | | | - Kay-Hooi Khoo
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan
| | - Lara K. Mahal
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Canada
| | - Wesley F. Zandberg
- Department of Chemistry, The University of British Columbia, Kelowna, V1V 1V7, Canada
| | - Xuefei Huang
- Departments of Chemistry and Biomedical Engineering, Michigan State University, East Lansing, Michigan 48824, United States
| | - John S. Klassen
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Canada
| | - Matthew S. Macauley
- Department of Chemistry, University of Alberta, Edmonton, T6G 2G2, Canada
- Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, T6G 2J7, Canada
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32
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Lim J, Sari-Ak D, Bagga T. Siglecs as Therapeutic Targets in Cancer. BIOLOGY 2021; 10:1178. [PMID: 34827170 PMCID: PMC8615218 DOI: 10.3390/biology10111178] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/03/2021] [Accepted: 11/08/2021] [Indexed: 02/06/2023]
Abstract
Hypersialylation is a common post-translational modification of protein and lipids found on cancer cell surfaces, which participate in cell-cell interactions and in the regulation of immune responses. Sialic acids are a family of nine-carbon α-keto acids found at the outermost ends of glycans attached to cell surfaces. Given their locations on cell surfaces, tumor cells aberrantly overexpress sialic acids, which are recognized by Siglec receptors found on immune cells to mediate broad immunomodulatory signaling. Enhanced sialylation exposed on cancer cell surfaces is exemplified as "self-associated molecular pattern" (SAMP), which tricks Siglec receptors found on leukocytes to greatly down-regulate immune responsiveness, leading to tumor growth. In this review, we focused on all 15 human Siglecs (including Siglec XII), many of which still remain understudied. We also highlighted strategies that disrupt the course of Siglec-sialic acid interactions, such as antibody-based therapies and sialic acid mimetics leading to tumor cell depletion. Herein, we introduced the central roles of Siglecs in mediating pro-tumor immunity and discussed strategies that target these receptors, which could benefit improved cancer immunotherapy.
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Affiliation(s)
- Jackwee Lim
- Singapore Immunology Network, A*STAR, 8a Biomedical Grove, Singapore 138648, Singapore;
| | - Duygu Sari-Ak
- Department of Medical Biology, School of Medicine, University of Health Sciences, Istanbul 34668, Turkey;
| | - Tanaya Bagga
- Singapore Immunology Network, A*STAR, 8a Biomedical Grove, Singapore 138648, Singapore;
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33
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D'Addio M, Frey J, Tacconi C, Commerford CD, Halin C, Detmar M, Cummings RD, Otto VI. Sialoglycans on lymphatic endothelial cells augment interactions with Siglec-1 (CD169) of lymph node macrophages. FASEB J 2021; 35:e22017. [PMID: 34699642 DOI: 10.1096/fj.202100300r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 09/30/2021] [Accepted: 10/12/2021] [Indexed: 12/20/2022]
Abstract
Cellular interactions between endothelial cells and macrophages regulate macrophage localization and phenotype, but the mechanisms underlying these interactions are poorly understood. Here we explored the role of sialoglycans on lymphatic endothelial cells (LEC) in interactions with macrophage-expressed Siglec-1 (CD169). Lectin-binding assays and mass spectrometric analyses revealed that LEC from human skin express more sialylated glycans than the corresponding blood endothelial cells. Higher amounts of sialylated and/or sulfated glycans on LEC than BEC were consistently observed in murine skin, lung and lymph nodes. The floor LEC of the subcapsular sinus (SCS) in murine lymph nodes (LN) displayed sialylated glycans at particularly high densities. The sialoglycans of LN LEC were strongly bound by Siglec-1. Such binding plays an important role in the localization of Siglec-1+ LN-SCS macrophages, as their numbers are strongly reduced in mice expressing a Siglec-1 mutant that is defective in sialoglycan binding. The residual Siglec-1+ macrophages are less proliferative and have a more anti-inflammatory phenotype. We propose that the densely clustered, sialylated glycans on the SCS floor LEC are a key component of the macrophage niche, providing anchorage for the Siglec-1+ LN-SCS macrophages.
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Affiliation(s)
- Marco D'Addio
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Jasmin Frey
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Carlotta Tacconi
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | | | - Cornelia Halin
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Michael Detmar
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Richard D Cummings
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Vivianne I Otto
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
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34
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Abstract
The surface of every eukaryotic cell is coated in a dense layer of structurally diverse glycans that together comprise the glycocalyx, a key interface between intracellular biochemistry and the external environment. Many of the glycans within the glycocalyx terminate in anionic monosaccharides belonging to the sialic acid family. Advances in our understanding of the biological processes mediated by sialic acids at the interfaces between cells have catalyzed interest in metabolic, enzymatic, and chemical strategies to edit the total complement of cellular sialic acids-the sialome. Here, we review strategies for altering the composition of the sialome with particular focus on glycan structures and state-of-the-art tools.
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Affiliation(s)
- Landon J. Edgar
- Department of Pharmacology and Toxicology, The University of Toronto, Toronto, Ontario, Canada, M5S 1A8
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35
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Edgar L, Thompson AJ, Vartabedian VF, Kikuchi C, Woehl JL, Teijaro JR, Paulson JC. Sialic Acid Ligands of CD28 Suppress Costimulation of T Cells. ACS CENTRAL SCIENCE 2021; 7:1508-1515. [PMID: 34584952 PMCID: PMC8461770 DOI: 10.1021/acscentsci.1c00525] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Indexed: 05/07/2023]
Abstract
Effector T cells comprise the cellular arm of the adaptive immune system and are essential for mounting immune responses against pathogens and cancer. To reach effector status, costimulation through CD28 is required. Here, we report that sialic acid-containing glycans on the surface of both T cells and APCs are alternative ligands of CD28 that compete with binding to its well-documented activatory ligand CD80 on the APC, resulting in attenuated costimulation. Removal of sialic acids enhances antigen-mediated activation of naïve T cells and also increases the revival of effector T cells made hypofunctional or exhausted via chronic viral infection. This occurs through a mechanism that is synergistic with antibody blockade of the inhibitory PD-1 axis. These results reveal a previously unrecognized role of sialic acid ligands in attenuation of CD28-mediated costimulation of T cells.
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Affiliation(s)
- Landon
J. Edgar
- Department
of Molecular Medicine, The Scripps Research
Institute, La Jolla, California 92037, United States
- Department
of Immunology and Microbiology, The Scripps
Research Institute, La Jolla, California 92037, United States
| | - Andrew J. Thompson
- Department
of Molecular Medicine, The Scripps Research
Institute, La Jolla, California 92037, United States
- Department
of Immunology and Microbiology, The Scripps
Research Institute, La Jolla, California 92037, United States
| | - Vincent F. Vartabedian
- Department
of Immunology and Microbiology, The Scripps
Research Institute, La Jolla, California 92037, United States
| | - Chika Kikuchi
- Department
of Molecular Medicine, The Scripps Research
Institute, La Jolla, California 92037, United States
- Department
of Immunology and Microbiology, The Scripps
Research Institute, La Jolla, California 92037, United States
| | - Jordan L. Woehl
- Department
of Molecular Medicine, The Scripps Research
Institute, La Jolla, California 92037, United States
| | - John R. Teijaro
- Department
of Immunology and Microbiology, The Scripps
Research Institute, La Jolla, California 92037, United States
| | - James C. Paulson
- Department
of Molecular Medicine, The Scripps Research
Institute, La Jolla, California 92037, United States
- Department
of Immunology and Microbiology, The Scripps
Research Institute, La Jolla, California 92037, United States
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36
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Dandopath Patra M. Comparative study of binding abilities of Siglec-7 to different ligands using molecular modeling techniques and structural analysis. J Carbohydr Chem 2021. [DOI: 10.1080/07328303.2021.1954656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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37
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Abstract
A dense and diverse array of glycans on glycoproteins and glycolipids decorate all cell surfaces. In vertebrates, many of these carry sialic acid, in a variety of linkages and glycan contexts, as their outermost sugar moiety. Among their functions, glycans engage complementary glycan binding proteins (lectins) to regulate cell physiology. Among the glycan binding proteins are the Siglecs, sialic acid binding immunoglobulin-like lectins. In humans, there are 14 Siglecs, most of which are expressed on overlapping subsets of immune system cells. Each Siglec engages distinct, endogenous sialylated glycans that initiate signaling programs and regulate cellular responses. Here, we explore the emerging science of Siglec ligands, including endogenous sialoglycoproteins and glycolipids and synthetic sialomimetics. Knowledge in this field promises to reveal new molecular pathways controlling cell physiology and new opportunities for therapeutic intervention.
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38
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Wang S, Chen C, Guan M, Liu D, Wan XF, Li L. Terminal Epitope-Dependent Branch Preference of Siglecs Toward N-Glycans. Front Mol Biosci 2021; 8:645999. [PMID: 33996901 PMCID: PMC8116747 DOI: 10.3389/fmolb.2021.645999] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 02/18/2021] [Indexed: 12/21/2022] Open
Abstract
Siglecs are sialic acid–binding immunoglobulin-like lectins that play vital roles in immune cell signaling. Siglecs help the immune system distinguish between self and nonself through the recognition of glycan ligands. While the primary binding specificities of Siglecs are known to be divergent, their specificities for complex glycans remain unclear. Herein, we determined N-glycan binding profiles of a set of Siglecs by using a complex asymmetric N-glycan microarray. Our results showed that Siglecs had unique terminal epitope-dependent branch preference when recognizing asymmetric N-glycans. Specifically, human Siglec-3, -9, and -10 prefer the α1-3 branch when Siaα2-6Galβ1-4GlcNAc terminal epitope serves as the binding ligand but prefer the opposite α1-6 branch when Siaα2-3Galβ1-4GlcNAc epitope serves as the ligand. Interestingly, Siglec-10 exhibited dramatic binding divergence toward a pair of Neu5Ac-containing asymmetric N-glycan isomers, as well as their Neu5Gc-containing counterparts. This new information on complex glycan recognition by Siglecs provides insights into their biological roles and applications.
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Affiliation(s)
- Shuaishuai Wang
- Department of Chemistry, Georgia State University, Atlanta, GA, United States
| | - Congcong Chen
- Department of Chemistry, Georgia State University, Atlanta, GA, United States
| | - Minhui Guan
- MU Center for Influenza and Emerging Infectious Diseases, University of Missouri, Columbia, MO, United States.,Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO, United States.,Bond Life Sciences Center, University of Missouri, Columbia, MO, United States
| | - Ding Liu
- Department of Chemistry, Georgia State University, Atlanta, GA, United States
| | - Xiu-Feng Wan
- MU Center for Influenza and Emerging Infectious Diseases, University of Missouri, Columbia, MO, United States.,Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO, United States.,Bond Life Sciences Center, University of Missouri, Columbia, MO, United States.,Department of Electrical Engineering and Computer Science, College of Engineering, University of Missouri, Columbia, MO, United States
| | - Lei Li
- Department of Chemistry, Georgia State University, Atlanta, GA, United States
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Büll C, Nason R, Sun L, Van Coillie J, Madriz Sørensen D, Moons SJ, Yang Z, Arbitman S, Fernandes SM, Furukawa S, McBride R, Nycholat CM, Adema GJ, Paulson JC, Schnaar RL, Boltje TJ, Clausen H, Narimatsu Y. Probing the binding specificities of human Siglecs by cell-based glycan arrays. Proc Natl Acad Sci U S A 2021; 118:e2026102118. [PMID: 33893239 PMCID: PMC8092401 DOI: 10.1073/pnas.2026102118] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Siglecs are a family of sialic acid-binding receptors expressed by cells of the immune system and a few other cell types capable of modulating immune cell functions upon recognition of sialoglycan ligands. While human Siglecs primarily bind to sialic acid residues on diverse types of glycoproteins and glycolipids that constitute the sialome, their fine binding specificities for elaborated complex glycan structures and the contribution of the glycoconjugate and protein context for recognition of sialoglycans at the cell surface are not fully elucidated. Here, we generated a library of isogenic human HEK293 cells with combinatorial loss/gain of individual sialyltransferase genes and the introduction of sulfotransferases for display of the human sialome and to dissect Siglec interactions in the natural context of glycoconjugates at the cell surface. We found that Siglec-4/7/15 all have distinct binding preferences for sialylated GalNAc-type O-glycans but exhibit selectivity for patterns of O-glycans as presented on distinct protein sequences. We discovered that the sulfotransferase CHST1 drives sialoglycan binding of Siglec-3/8/7/15 and that sulfation can impact the preferences for binding to O-glycan patterns. In particular, the branched Neu5Acα2-3(6-O-sulfo)Galβ1-4GlcNAc (6'-Su-SLacNAc) epitope was discovered as the binding epitope for Siglec-3 (CD33) implicated in late-onset Alzheimer's disease. The cell-based display of the human sialome provides a versatile discovery platform that enables dissection of the genetic and biosynthetic basis for the Siglec glycan interactome and other sialic acid-binding proteins.
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Affiliation(s)
- Christian Büll
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Rebecca Nason
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Lingbo Sun
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Julie Van Coillie
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Daniel Madriz Sørensen
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Sam J Moons
- Cluster for Molecular Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, 6525 AJ Nijmegen, The Netherlands
| | - Zhang Yang
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Steven Arbitman
- Department of Pharmacology, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Steve M Fernandes
- Department of Pharmacology, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Sanae Furukawa
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Ryan McBride
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | - Corwin M Nycholat
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | - Gosse J Adema
- Department of Radiation Oncology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - James C Paulson
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | - Ronald L Schnaar
- Department of Pharmacology, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Thomas J Boltje
- Cluster for Molecular Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, 6525 AJ Nijmegen, The Netherlands
| | - Henrik Clausen
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark;
| | - Yoshiki Narimatsu
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, DK-2200 Copenhagen, Denmark;
- GlycoDisplay ApS, Copenhagen, 2100 N, Denmark
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40
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Functions and therapeutic targets of Siglec-mediated infections, inflammations and cancers. J Formos Med Assoc 2021; 120:5-24. [DOI: 10.1016/j.jfma.2019.10.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 06/11/2019] [Accepted: 10/28/2019] [Indexed: 12/20/2022] Open
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41
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Nowack L, Teschers CS, Albrecht S, Gilmour R. Oligodendroglial glycolipids in (Re)myelination: implications for multiple sclerosis research. Nat Prod Rep 2021; 38:890-904. [PMID: 33575689 DOI: 10.1039/d0np00093k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Covering: up to 2020 This short review surveys aspects of glycolipid-based natural products and their biological relevance in multiple sclerosis (MS). The role of isolated gangliosides in disease models is discussed together with an overview of ganglioside-inspired small molecule drugs and imaging probes. The discussion is extended to neurodegeneration in a more general context and addresses the need for more efficient synthetic methods to generate (glyco)structures that are of therapeutic relevance.
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Affiliation(s)
- Luise Nowack
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany. and Institute of Neuropathology, University Hospital Münster, Pottkamp 2, 48149 Münster, Germany.
| | - Charlotte S Teschers
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany.
| | - Stefanie Albrecht
- Institute of Neuropathology, University Hospital Münster, Pottkamp 2, 48149 Münster, Germany.
| | - Ryan Gilmour
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149 Münster, Germany.
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42
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Wang CW, Lee OK, Fischer WB. Screening coronavirus and human proteins for sialic acid binding sites using a docking approach. AIMS BIOPHYSICS 2021. [DOI: 10.3934/biophy.2021019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
<abstract>
<p>The initial step of interaction of some pathogens with the host is driven by the interaction of glycoproteins of either side <italic>via</italic> endcaps of their glycans. These end caps consist of sialic acids or sugar molecules. Coronaviruses (CoVs), including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), are found to use this route of interaction. The strength and spatial interactions on the single molecule level of sialic acids with either the spike (S) protein of SARS coronaviruses, or human angiotensin-converting enzyme 2 (ACE2) and furin are probed and compared to the binding modes of those sugar molecules which are present in glycans of glycoproteins. The protocol of using single molecules is seen as a simplified but effective mimic of the complex mode of interaction of the glycans. Averaged estimated binding energies from a docking approach result in preferential binding of the sialic acids to a specific binding site of the S protein of human coronavirus OC43 (HCoV-OC43). Furin is proposed to provide better binding sites for sialic acids than ACE2, albeit outweighed by sites for other sugar molecules. Absolute minimal estimated binding energies indicate weak binding affinities and are indifferent to the type of sugar molecules and the proteins. Neither the proposed best binding sites of the sialic acids nor those of the sugar molecules overlap with any of the cleavage sites at the S protein and the active sites of the human proteins.</p>
</abstract>
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A versatile soluble siglec scaffold for sensitive and quantitative detection of glycan ligands. Nat Commun 2020; 11:5091. [PMID: 33037195 PMCID: PMC7547722 DOI: 10.1038/s41467-020-18907-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 09/21/2020] [Indexed: 12/15/2022] Open
Abstract
Sialic acid-binding immunoglobulin-type lectins (Siglecs) are immunomodulatory receptors that are regulated by their glycan ligands. The connections between Siglecs and human disease motivate improved methods to detect Siglec ligands. Here, we describe a new versatile set of Siglec-Fc proteins for glycan ligand detection. Enhanced sensitivity and selectivity are enabled through multimerization and avoiding Fc receptors, respectively. Using these Siglec-Fc proteins, Siglec ligands are systematically profiled on healthy and cancerous cells and tissues, revealing many unique patterns. Additional features enable the production of small, homogenous Siglec fragments and development of a quantitative ligand-binding mass spectrometry assay. Using this assay, the ligand specificities of several Siglecs are clarified. For CD33 (Siglec-3), we demonstrate that it recognizes both α2-3 and α2-6 sialosides in solution and on cells, which has implications for its link to Alzheimer’s disease susceptibility. These soluble Siglecs reveal the abundance of their glycan ligands on host cells as self-associated molecular patterns. Sialic acid-binding immunoglobulin-type lectins (Siglecs) are a family of immunomodulatory receptors expressed on cells of the hematopoietic lineage. Here the authors demonstrate an approach for the identification of the glycan ligands of Siglecs, which is also applicable to other families of glycan-binding proteins.
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Ryckman AE, Brockhausen I, Walia JS. Metabolism of Glycosphingolipids and Their Role in the Pathophysiology of Lysosomal Storage Disorders. Int J Mol Sci 2020; 21:E6881. [PMID: 32961778 PMCID: PMC7555265 DOI: 10.3390/ijms21186881] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 09/04/2020] [Accepted: 09/12/2020] [Indexed: 12/11/2022] Open
Abstract
Glycosphingolipids (GSLs) are a specialized class of membrane lipids composed of a ceramide backbone and a carbohydrate-rich head group. GSLs populate lipid rafts of the cell membrane of eukaryotic cells, and serve important cellular functions including control of cell-cell signaling, signal transduction and cell recognition. Of the hundreds of unique GSL structures, anionic gangliosides are the most heavily implicated in the pathogenesis of lysosomal storage diseases (LSDs) such as Tay-Sachs and Sandhoff disease. Each LSD is characterized by the accumulation of GSLs in the lysosomes of neurons, which negatively interact with other intracellular molecules to culminate in cell death. In this review, we summarize the biosynthesis and degradation pathways of GSLs, discuss how aberrant GSL metabolism contributes to key features of LSD pathophysiology, draw parallels between LSDs and neurodegenerative proteinopathies such as Alzheimer's and Parkinson's disease and lastly, discuss possible therapies for patients.
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Affiliation(s)
| | - Inka Brockhausen
- Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, ON K7L 2V5, Canada;
| | - Jagdeep S. Walia
- Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, ON K7L 2V5, Canada;
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Movsisyan LD, Macauley MS. Structural advances of Siglecs: insight into synthetic glycan ligands for immunomodulation. Org Biomol Chem 2020; 18:5784-5797. [PMID: 32756649 DOI: 10.1039/d0ob01116a] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Sialic acid-binding immunoglobulin-like lectins (Siglecs) are transmembrane proteins of the immunoglobulin (Ig) superfamily predominantly expressed on the cells of our immune system. Siglecs recognize sialic acid via their terminal V-set domain. In mammals, sialic acid-terminated glycolipids and glycoproteins are the ligands of Siglecs, and the monomeric affinity of Siglecs for their sialic acid-containing ligands is weak. Significant efforts have been devoted toward the development of chemically modified sialoside ligands to target Siglecs with higher affinity and selectivity. In this review we discuss natural and synthetic sialoside ligands for each human Siglec, emphasizing the ligand binding determinants uncovered from recent advances in protein structural information. Potential therapeutic applications of these ligands are also discussed.
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Affiliation(s)
- Levon D Movsisyan
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Matthew S Macauley
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada and Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, Alberta, Canada.
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Unveiling Molecular Recognition of Sialoglycans by Human Siglec-10. iScience 2020; 23:101231. [PMID: 32629603 PMCID: PMC7306591 DOI: 10.1016/j.isci.2020.101231] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/20/2020] [Accepted: 05/29/2020] [Indexed: 12/17/2022] Open
Abstract
Siglec-10 is an inhibitory I-type lectin selectively recognizing sialoglycans exposed on cell surfaces, involved in several patho-physiological processes. The key role Siglec-10 plays in the regulation of immune cell functions has made it a potential target for the development of immunotherapeutics against a broad range of diseases. However, the crystal structure of the protein has not been resolved for the time being and the atomic description of Siglec-10 interactions with complex glycans has not been previously unraveled. We present here the first insights of the molecular mechanisms regulating the interaction between Siglec-10 and naturally occurring sialoglycans. We used combined spectroscopic, computational and biophysical approaches to dissect glycans' epitope mapping and conformation upon binding in order to afford a description of the 3D complexes. Our outcomes provide a structural perspective for the rational design and development of high-affinity ligands to control the receptor functionality. We unveiled the molecular basis of sialoglycans recognition by Siglec-10 The conformation of sialoglycans drives the interaction with the protein Siglec-10 is able to recognize and bind complex N-glycans Our outcomes may open the venue for the design and development of novel glycomimetics
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47
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Yan H, Hjorth M, Winkeljann B, Dobryden I, Lieleg O, Crouzier T. Glyco-Modification of Mucin Hydrogels to Investigate Their Immune Activity. ACS APPLIED MATERIALS & INTERFACES 2020; 12:19324-19336. [PMID: 32301325 PMCID: PMC7304668 DOI: 10.1021/acsami.0c03645] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 04/03/2020] [Indexed: 05/07/2023]
Abstract
Mucins are multifunctional glycosylated proteins that are increasingly investigated as building blocks of novel biomaterials. An attractive feature is their ability to modulate the immune response, in part by engaging with sialic acid binding receptors on immune cells. Once assembled into hydrogels, bovine submaxillary mucins (Muc gels) were shown to modulate the recruitment and activation of immune cells and avoid fibrous encapsulation in vivo. However, nothing is known about the early immune response to Muc gels. This study characterizes the response of macrophages, important orchestrators of the material-mediated immune response, over the first 7 days in contact with Muc gels. The role of mucin-bound sialic acid sugar residues was investigated by first enzymatically cleaving the sugar and then assembling the mucin variants into covalently cross-linked hydrogels with rheological and surface nanomechanical properties similar to nonmodified Muc gels. Results with THP-1 and human primary peripheral blood monocytes derived macrophages showed that Muc gels transiently activate the expression of both pro-inflammatory and anti-inflammatory cytokines and cell surface markers, for most makers with a maximum on the first day and loss of the effect after 7 days. The activation was sialic acid-dependent for a majority of the markers followed. The pattern of gene expression, protein expression, and functional measurements did not strictly correspond to M1 or M2 macrophage phenotypes. This study highlights the complex early events in macrophage activation in contact with mucin materials and the importance of sialic acid residues in such a response. The enzymatic glyco-modulation of Muc gels appears as a useful tool to help understand the biological functions of specific glycans on mucins which can further inform on their use in various biomedical applications.
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Affiliation(s)
- Hongji Yan
- Division of Glycoscience,
Department of Chemistry, School of Engineering Sciences in Chemistry,
Biotechnology and Health, KTH, Royal Institute
of Technology, AlbaNova University Center, 106 91 Stockholm, Sweden
| | - Morgan Hjorth
- Division of Glycoscience,
Department of Chemistry, School of Engineering Sciences in Chemistry,
Biotechnology and Health, KTH, Royal Institute
of Technology, AlbaNova University Center, 106 91 Stockholm, Sweden
| | - Benjamin Winkeljann
- Department of Mechanical Engineering and Munich School of Bioengineering, Technical University of Munich, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Illia Dobryden
- Division of Surface and Corrosion Science, Department of Chemistry,
School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Drottning Kristinas väg 51, 10044 Stockholm, Sweden
| | - Oliver Lieleg
- Department of Mechanical Engineering and Munich School of Bioengineering, Technical University of Munich, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Thomas Crouzier
- Division of Glycoscience,
Department of Chemistry, School of Engineering Sciences in Chemistry,
Biotechnology and Health, KTH, Royal Institute
of Technology, AlbaNova University Center, 106 91 Stockholm, Sweden
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Abstract
Sialic acid-binding immunoglobulin-type lectins (Siglecs) are expressed on the majority of white blood cells of the immune system and play critical roles in immune cell signaling. Through recognition of sialic acid-containing glycans as ligands, they help the immune system distinguish between self and nonself. Because of their restricted cell type expression and roles as checkpoints in immune cell responses in human diseases such as cancer, asthma, allergy, neurodegeneration, and autoimmune diseases they have gained attention as targets for therapeutic interventions. In this review we describe the Siglec family, its roles in regulation of immune cell signaling, current efforts to define its roles in disease processes, and approaches to target Siglecs for treatment of human disease.
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Affiliation(s)
- Shiteng Duan
- Departments of Molecular Medicine, and Immunology and Microbiology, Scripps Research, La Jolla, California 92037, USA;
| | - James C Paulson
- Departments of Molecular Medicine, and Immunology and Microbiology, Scripps Research, La Jolla, California 92037, USA;
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Zhou X, Yang G, Guan F. Biological Functions and Analytical Strategies of Sialic Acids in Tumor. Cells 2020; 9:E273. [PMID: 31979120 PMCID: PMC7072699 DOI: 10.3390/cells9020273] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/17/2020] [Accepted: 01/21/2020] [Indexed: 12/21/2022] Open
Abstract
Sialic acids, a subset of nine carbon acidic sugars, often exist as the terminal sugars of glycans on either glycoproteins or glycolipids on the cell surface. Sialic acids play important roles in many physiological and pathological processes via carbohydrate-protein interactions, including cell-cell communication, bacterial and viral infections. In particular, hypersialylation in tumors, as well as their roles in tumor growth and metastasis, have been widely described. Recent studies have indicated that the aberrant sialylation is a vital way for tumor cells to escape immune surveillance and keep malignance. In this article, we outline the present state of knowledge on the metabolic pathway of human sialic acids, the function of hypersialylation in tumors, as well as the recent labeling and analytical techniques for sialic acids. It is expected to offer a brief introduction of sialic acid metabolism and provide advanced analytical strategies in sialic acid studies.
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Affiliation(s)
- Xiaoman Zhou
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Ganglong Yang
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Feng Guan
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- Joint International Research Laboratory of Glycobiology and Medicinal Chemistry, College of Life Science, Northwest University, Xi’an 710069, China
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50
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Gao C, Wei M, McKitrick TR, McQuillan AM, Heimburg-Molinaro J, Cummings RD. Glycan Microarrays as Chemical Tools for Identifying Glycan Recognition by Immune Proteins. Front Chem 2019; 7:833. [PMID: 31921763 PMCID: PMC6923789 DOI: 10.3389/fchem.2019.00833] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 11/15/2019] [Indexed: 12/15/2022] Open
Abstract
Glycans and glycan binding proteins (GBPs or lectins) are essential components in almost every aspect of immunology. Investigations of the interactions between glycans and GBPs have greatly advanced our understanding of the molecular basis of these fundamental immunological processes. In order to better study the glycan-GBP interactions, microscope glass slide-based glycan microarrays were conceived and proved to be an incredibly useful and successful tool. A variety of methods have been developed to better present the glycans so that they mimic natural presentations. Breakthroughs in chemical biology approaches have also made available glycans with sophisticated structures that were considered practically impossible just a few decade ago. Glycan microarrays provide a wealth of valuable information in immunological studies. They allow for discovery of detailed glycan binding preferences or novel binding epitopes of known endogenous immune receptors, which can potentially lead to the discovery of natural ligands that carry the glycans. Glycan microarrays also serve as a platform to discover new GBPs that are vital to the process of infection and invasion by microorganisms. This review summarizes the construction strategies and the immunological applications of glycan microarrays, particularly focused on those with the most comprehensive sets of glycan structures. We also review new methods and technologies that have evolved. We believe that glycan microarrays will continue to benefit the growing research community with various interests in the field of immunology.
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Affiliation(s)
| | | | | | | | | | - Richard D. Cummings
- Department of Surgery, National Center for Functional Glycomics, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States
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