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Guglielmi MV, Mastrodonato M, Semeraro D, Mentino D, Capriello T, La Pietra A, Giarra A, Scillitani G, Ferrandino I. Aluminum exposure alters the pedal mucous secretions of the chocolate-band snail, Eobania vermiculata (Gastropoda: Helicidae). Microsc Res Tech 2024; 87:1453-1466. [PMID: 38407429 DOI: 10.1002/jemt.24529] [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: 12/15/2023] [Revised: 01/09/2024] [Accepted: 02/10/2024] [Indexed: 02/27/2024]
Abstract
Aluminum (Al) is used in everyday life and present in food drugs, packaging, industry, and agriculture. Although it is the most common metal in the Earth crust, a correlation has been demonstrated between its presence and various pathologies, even serious ones, especially of a neurological type. However, there is a histological gap regarding the role Al can have in contact with the covering and secreting epithelia. The alterations of the ventral and dorsal foot mucocytes and their secretions of the snail Eobania vermiculata caused by Al were investigated in situ by histochemical and lectin-histochemical techniques. Administration to different experimental groups took place for 3 and 9 days with 50 and 200 μM of AlCl3. Several types of mucocytes were detected with a prevalent secretion of acid glycans in the foot of E. vermiculata. Sulfated glycans prevail in the dorsal region, with one type showing only fucosylated residues and another also having galactosaminylated and glycosaminylated residues. Carboxylated glycans prevail in the ventral region, with presence of galactosaminylated, glycosaminylated, and fucosylated residuals in both cells. Snails treated presented a general decrease of mucin amount in the secreting cells and affected the mucus composition. These changes could alter the rheological and functional properties of the mucus with possible implications for the health of the treated animals. RESEARCH HIGHLIGHTS: Snails were fed with Al-contaminated lettuce at different concentrations. In the foot mucocytes produced mucus with prevailing acidic glycans. In the treated resulted a reduction in the amount of mucus and an alteration of glycan composition.
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Affiliation(s)
- Marco Vito Guglielmi
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Bari, Italy
| | - Maria Mastrodonato
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Bari, Italy
| | - Daniela Semeraro
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Bari, Italy
| | - Donatella Mentino
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Bari, Italy
| | - Teresa Capriello
- Department of Biology, University of Naples "Federico II", Naples, Italy
| | | | - Antonella Giarra
- Department of Chemical Sciences, University of Naples "Federico II", Naples, Italy
| | - Giovanni Scillitani
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, Bari, Italy
| | - Ida Ferrandino
- Department of Biology, University of Naples "Federico II", Naples, Italy
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Osterne VJ, Pinto-Junior VR, Oliveira MV, Nascimento KS, Van Damme EJ, Cavada BS. Computational insights into the circular permutation roles on ConA binding and structural stability. Curr Res Struct Biol 2024; 7:100140. [PMID: 38559841 PMCID: PMC10979261 DOI: 10.1016/j.crstbi.2024.100140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 03/17/2024] [Accepted: 03/20/2024] [Indexed: 04/04/2024] Open
Abstract
The mechanisms behind Concanavalin A (ConA) circular permutation have been under investigation since 1985. Although a vast amount of information is available about this lectin and its applications, the exact purpose of its processing remains unclear. To shed light on this, this study employed computer simulations to compare the unprocessed ProConA with the mature ConA. This approach aimed to reveal the importance of the post-translational modifications, especially how they affect the lectin stability and carbohydrate-binding properties. To achieve these goals, we conducted 200 ns molecular dynamics simulations and trajectory analyses on the monomeric forms of ProConA and ConA (both unbound and in complex with D-mannose and the GlcNAc2Man9 N-glycan), as well as on their oligomeric forms. Our findings reveal significant stability differences between ProConA and ConA at both the monomeric and tetrameric levels, with ProConA exhibiting consistently lower stability parameters compared to ConA. In terms of carbohydrate binding properties, however, both lectins showed remarkable similarities in their interaction profiles, contact numbers, and binding free energies with D-mannose and the high-mannose N-glycan. Overall, our results suggest that the processing of ProConA significantly enhances the stability of the mature lectin, especially in maintaining the tetrameric oligomer, without substantially affecting its carbohydrate-binding properties.
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Affiliation(s)
- Vinicius J.S. Osterne
- Laboratory of Biochemistry and Glycobiology, Department of Biotechnology, Ghent University, 9000, Ghent, Belgium
| | - Vanir R. Pinto-Junior
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, 60.440-970, Fortaleza, CE, Brazil
- Department of Physics, Federal University of Ceara, 60.440-970, Fortaleza, CE, Brazil
| | - Messias V. Oliveira
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, 60.440-970, Fortaleza, CE, Brazil
| | - Kyria S. Nascimento
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, 60.440-970, Fortaleza, CE, Brazil
| | - Els J.M. Van Damme
- Laboratory of Biochemistry and Glycobiology, Department of Biotechnology, Ghent University, 9000, Ghent, Belgium
| | - Benildo S. Cavada
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, 60.440-970, Fortaleza, CE, Brazil
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Tai SB, Huang CY, Chung CL, Sung PJ, Wen ZH, Chen CL. Prodigiosin Inhibits Transforming Growth Factor β Signaling by Interfering Receptor Recycling and Subcellular Translocation in Epithelial Cells. Mol Pharmacol 2024; 105:286-300. [PMID: 38278554 DOI: 10.1124/molpharm.123.000776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 12/05/2023] [Accepted: 01/02/2024] [Indexed: 01/28/2024] Open
Abstract
Prodigiosin (PG) is a naturally occurring polypyrrole red pigment produced by numerous microorganisms including some Serratia and Streptomyces strains. PG has exhibited promising anticancer activity; however, the molecular mechanisms of action of PG on malignant cells remain ambiguous. Transforming growth factor-β (TGF-β) is a multifunctional cytokine that governs a wide array of cellular processes in development and tissue homeostasis. Malfunctions of TGF-β signaling are associated with numerous human cancers. Emerging evidence underscores the significance of internalized TGF-β receptors and their intracellular trafficking in initiating signaling cascades. In this study, we identified PG as a potent inhibitor of the TGF-β pathway. PG blocked TGF-β signaling by targeting multiple sites of this pathway, including facilitating the sequestering of TGF-β receptors in the cytoplasm by impeding the recycling of type II TGF-β receptors to the cell surface. Additionally, PG prompts a reduction in the abundance of receptors on the cell surface through the disruption of the receptor glycosylation. In human Caucasian lung carcinoma cells and human hepatocellular cancer cell line cells, nanomolar concentrations of PG substantially diminish TGF-β-triggered phosphorylation of Smad2 protein. This attenuation is further reflected in the suppression of downstream target gene expression, including those encoding fibronectin, plasminogen activator inhibitor-1, and N-cadherin. SIGNIFICANCE STATEMENT: Prodigiosin (PG) emerges from this study as a potent TGF-β pathway inhibitor, disrupting receptor trafficking and glycosylation and reducing TGF-β signaling and downstream gene expression. These findings not only shed light on PG's potential therapeutic role but also present a captivating avenue towards future anti-TGF-β strategies.
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Affiliation(s)
- Shun-Ban Tai
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Yin Huang
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Ling Chung
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ping-Jyun Sung
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Zhi-Hong Wen
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chun-Lin Chen
- Departments of Marine Biotechnology and Resources (S.-B.T., Z.-H.W.) and Biological Sciences (C.-L.Chu., C.-L.Che.), National Sun Yat-Sen University, Kaohsiung, Taiwan; Division of Rheumatology, Immunology and Allergy, Department of Internal Medicine, Zuoying Armed Forces General Hospital, Kaohsiung, Taiwan (S.-B.T.); Department of Orthopaedics, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan (C.-y.H.); National Museum of Marine Biology and Aquarium, Pingtung, Taiwan (P.-J.S.); and Department of Biotechnology (C.-L.Che.) and Graduate Institute of Natural Products, College of Pharmacy (C.-L.Che.), Kaohsiung Medical University, Kaohsiung, Taiwan
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Corcoran E, Olayinka A, di Luca M, Gusti Y, Hakimjavadi R, O'Connor B, Redmond EM, Cahill PA. N-Glycans on the extracellular domain of the Notch1 receptor control Jagged-1 induced Notch signalling and myogenic differentiation of S100β resident vascular stem cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.17.567576. [PMID: 38014317 PMCID: PMC10680845 DOI: 10.1101/2023.11.17.567576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Notch signalling, critical for development and postnatal homeostasis of the vascular system, is highly regulated by several mechanisms including glycosylation. While the importance of O-linked glycosylation is widely accepted, the structure and function of N-glycans has yet to be defined. Here, we take advantage of lectin binding assays in combination with pharmacological, molecular, and site-directed mutagenetic approaches to study N-glycosylation of the Notch1 receptor. We find that several key oligosaccharides containing bisecting or core fucosylated structures decorate the receptor, control expression and receptor trafficking, and dictate Jagged-1 activation of Notch target genes and myogenic differentiation of multipotent S100β vascular stem cells. N-glycans at asparagine (N) 1241 and 1587 protect the receptor from accelerated degradation, while the oligosaccharide at N888 directly affects signal transduction. Conversely, N-linked glycans at N959, N1179, N1489 do not impact canonical signalling but inhibit differentiation. Our work highlights a novel functional role for N-glycans in controlling Notch1 signalling and differentiation of vascular stem cells.
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Affiliation(s)
- Eoin Corcoran
- Vascular Biology and Therapeutics Laboratory, School of Biotechnology Faculty of Science and Health, Dublin City University, Dublin, Ireland
| | - Abidemi Olayinka
- Vascular Biology and Therapeutics Laboratory, School of Biotechnology Faculty of Science and Health, Dublin City University, Dublin, Ireland
| | - Mariana di Luca
- Vascular Biology and Therapeutics Laboratory, School of Biotechnology Faculty of Science and Health, Dublin City University, Dublin, Ireland
| | - Yusof Gusti
- Vascular Biology and Therapeutics Laboratory, School of Biotechnology Faculty of Science and Health, Dublin City University, Dublin, Ireland
| | - Roya Hakimjavadi
- Vascular Biology and Therapeutics Laboratory, School of Biotechnology Faculty of Science and Health, Dublin City University, Dublin, Ireland
| | - Brendan O'Connor
- School of Biotechnology Faculty of Science and Health, Dublin City University, Dublin, Ireland
| | - Eileen M Redmond
- Department of Surgery, University of Rochester, 601 Elmwood Ave, Rochester, NY 14642, United States
| | - Paul A Cahill
- Vascular Biology and Therapeutics Laboratory, School of Biotechnology Faculty of Science and Health, Dublin City University, Dublin, Ireland
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5
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Lossio CF, Osterne VJS, Pinto-Junior VR, Chen S, Oliveira MV, Verduijn J, Verbeke I, Serna S, Reichardt NC, Skirtach A, Cavada BS, Van Damme EJM, Nascimento KS. Structural Analysis and Characterization of an Antiproliferative Lectin from Canavalia villosa Seeds. Int J Mol Sci 2023; 24:15966. [PMID: 37958949 PMCID: PMC10649158 DOI: 10.3390/ijms242115966] [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: 09/14/2023] [Revised: 10/29/2023] [Accepted: 10/30/2023] [Indexed: 11/15/2023] Open
Abstract
Cells use glycans to encode information that modulates processes ranging from cell-cell recognition to programmed cell death. This information is encoded within a glycocode, and its decoding is performed by carbohydrate-binding proteins. Among these, lectins stand out due to their specific and reversible interaction with carbohydrates. Changes in glycosylation patterns are observed in several pathologies, including cancer, where abnormal glycans are found on the surfaces of affected tissues. Given the importance of the bioprospection of promising biomolecules, the current work aimed to determine the structural properties and anticancer potential of the mannose-specific lectin from seeds of Canavalia villosa (Cvill). Experimental elucidation of the primary and 3D structures of the lectin, along with glycan array and molecular docking, facilitated the determination of its fine carbohydrate-binding specificity. These structural insights, coupled with the lectin's specificity, have been combined to explain the antiproliferative effect of Cvill against cancer cell lines. This effect is dependent on the carbohydrate-binding activity of Cvill and its uptake in the cells, with concomitant activation of autophagic and apoptotic pathways.
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Affiliation(s)
- Claudia F. Lossio
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza 60440-970, Brazil (B.S.C.)
| | - Vinicius J. S. Osterne
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza 60440-970, Brazil (B.S.C.)
- Laboratory of Biochemistry and Glycobiology, Department of Biotechnology, Ghent University, 9000 Ghent, Belgium
| | - Vanir R. Pinto-Junior
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza 60440-970, Brazil (B.S.C.)
- Department of Physics, Federal University of Ceara, Fortaleza 60440-970, Brazil
| | - Simin Chen
- Laboratory of Biochemistry and Glycobiology, Department of Biotechnology, Ghent University, 9000 Ghent, Belgium
| | - Messias V. Oliveira
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza 60440-970, Brazil (B.S.C.)
| | - Joost Verduijn
- Nano-Biotechnology Group, Department of Biotechnology, Ghent University, 9000 Ghent, Belgium
| | - Isabel Verbeke
- Laboratory of Biochemistry and Glycobiology, Department of Biotechnology, Ghent University, 9000 Ghent, Belgium
| | - Sonia Serna
- Glycotechnology Lab, Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramon 194, 20014 Donostia-San Sebastián, Spain
| | - Niels C. Reichardt
- Glycotechnology Lab, Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramon 194, 20014 Donostia-San Sebastián, Spain
- Centro de Investigación Biomédica en Red (CIBER-BBN), Paseo de Miramon 194, 20014 Donostia-San Sebastián, Spain
| | - Andre Skirtach
- Nano-Biotechnology Group, Department of Biotechnology, Ghent University, 9000 Ghent, Belgium
| | - Benildo S. Cavada
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza 60440-970, Brazil (B.S.C.)
| | - Els J. M. Van Damme
- Laboratory of Biochemistry and Glycobiology, Department of Biotechnology, Ghent University, 9000 Ghent, Belgium
| | - Kyria S. Nascimento
- Laboratory of Biologically Active Molecules, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza 60440-970, Brazil (B.S.C.)
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Guglielmi MV, Semeraro D, Mentino D, Mastrodonato M, Mastrototaro F, Scillitani G. Season- and sex-related variation in mucin secretions of the striped Venus clam, Chamelea gallina (Linnaeus, 1758) (Bivalvia: Veneridae). THE EUROPEAN ZOOLOGICAL JOURNAL 2023. [DOI: 10.1080/24750263.2023.2190343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023] Open
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7
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Rainyte J, Zvirblis G, Zaveckas M, Kucinskaite-Kodze I, Silimavicius L, Petraityte-Burneikiene R. Immunological comparison of recombinant shrimp allergen Pen m 4, produced in Pichia pastoris and Escherichia coli. J Biotechnol 2023; 369:1-13. [PMID: 37164269 DOI: 10.1016/j.jbiotec.2023.05.002] [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: 02/05/2023] [Revised: 04/24/2023] [Accepted: 05/05/2023] [Indexed: 05/12/2023]
Abstract
Shellfish are a leading cause of allergies worldwide, affecting about one-tenth of the general population. The sarcoplasmic calcium-binding protein, also known as allergen Pen m 4, is an important factor in shrimp allergies. Our objective was to assess the most effective techniques for producing a recombinant Pen m 4 protein as a potential tool for diagnosing shrimp allergies. In this study, for the first time, we produced a functional recombinant Pen m 4 protein in a eukaryotic system, Pichia pastoris, and analyzed it against Escherichia coli-produced equivalents in enzyme-linked immunosorbent and reverse-phase protein microarray assays. A dual tag system based on the maltose-binding protein was successfully used to increase the yield of Pen m 4 by 1.3 to 2.3-fold in both bacteria and yeast, respectively. Immunological characterization showed that N-glycosylation is neither crucial for the folding of Pen m 4 nor its recognition by specific IgE. However, the Ca2+-depletion assay indicated a dependence on calcium ion presence in blood samples. Results demonstrate how a comparative analysis can elucidate essential allergen manufacturing points. In conclusion, E. coli-produced Pen m 4 protein fused with the maltose-binding protein should be the preferred option for further studies in Penaeus monodon allergy diagnostics.
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Affiliation(s)
- Juta Rainyte
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
| | - Gintautas Zvirblis
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
| | - Mindaugas Zaveckas
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
| | - Indre Kucinskaite-Kodze
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
| | - Laimis Silimavicius
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania; Imunodiagnostika Ltd., Moletu str. 16, 14260 Vilnius, Lithuania.
| | - Rasa Petraityte-Burneikiene
- Vilnius University Life Sciences Center Institute of Biotechnology, Sauletekio av. 7, 10257 Vilnius, Lithuania.
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Dalton HM, Viswanatha R, Brathwaite R, Zuno JS, Berman AR, Rushforth R, Mohr SE, Perrimon N, Chow CY. A genome-wide CRISPR screen identifies DPM1 as a modifier of DPAGT1 deficiency and ER stress. PLoS Genet 2022; 18:e1010430. [PMID: 36166480 PMCID: PMC9543880 DOI: 10.1371/journal.pgen.1010430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 10/07/2022] [Accepted: 09/14/2022] [Indexed: 11/19/2022] Open
Abstract
Partial loss-of-function mutations in glycosylation pathways underlie a set of rare diseases called Congenital Disorders of Glycosylation (CDGs). In particular, DPAGT1-CDG is caused by mutations in the gene encoding the first step in N-glycosylation, DPAGT1, and this disorder currently lacks effective therapies. To identify potential therapeutic targets for DPAGT1-CDG, we performed CRISPR knockout screens in Drosophila cells for genes associated with better survival and glycoprotein levels under DPAGT1 inhibition. We identified hundreds of candidate genes that may be of therapeutic benefit. Intriguingly, inhibition of the mannosyltransferase Dpm1, or its downstream glycosylation pathways, could rescue two in vivo models of DPAGT1 inhibition and ER stress, even though impairment of these pathways alone usually causes CDGs. While both in vivo models ostensibly cause cellular stress (through DPAGT1 inhibition or a misfolded protein), we found a novel difference in fructose metabolism that may indicate glycolysis as a modulator of DPAGT1-CDG. Our results provide new therapeutic targets for DPAGT1-CDG, include the unique finding of Dpm1-related pathways rescuing DPAGT1 inhibition, and reveal a novel interaction between fructose metabolism and ER stress.
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Affiliation(s)
- Hans M. Dalton
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Raghuvir Viswanatha
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Roderick Brathwaite
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jae Sophia Zuno
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Alexys R. Berman
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Rebekah Rushforth
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Stephanie E. Mohr
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Norbert Perrimon
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, United States of America
- Howard Hughes Medical Institute, Boston, Massachusetts, United States of America
| | - Clement Y. Chow
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
- * E-mail:
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9
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Morel M, Pochard P, Echchih W, Dueymes M, Bagacean C, Jousse-Joulin S, Devauchelle-Pensec V, Cornec D, Jamin C, Pers JO, Bordron A. Abnormal B cell glycosylation in autoimmunity: A new potential treatment strategy. Front Immunol 2022; 13:975963. [PMID: 36091064 PMCID: PMC9453492 DOI: 10.3389/fimmu.2022.975963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 08/03/2022] [Indexed: 11/13/2022] Open
Abstract
Systemic lupus erythematosus (SLE) and primary Sjögren’s syndrome (pSS) are two autoimmune diseases characterised by the production of pathogenic autoreactive antibodies. Their aetiology is poorly understood. Nevertheless, they have been shown to involve several factors, such as infections and epigenetic mechanisms. They also likely involve a physiological process known as glycosylation. Both SLE T cell markers and pSS-associated autoantibodies exhibit abnormal glycosylation. Such dysregulation suggests that defective glycosylation may also occur in B cells, thereby modifying their behaviour and reactivity. This study aimed to investigate B cell subset glycosylation in SLE, pSS and healthy donors and to extend the glycan profile to serum proteins and immunoglobulins. We used optimised lectin-based tests to demonstrate specific glycosylation profiles on B cell subsets that were specifically altered in both diseases. Compared to the healthy donor B cells, the SLE B cells exhibited hypofucosylation, whereas only the pSS B cells exhibited hyposialylation. Additionally, the SLE B lymphocytes had more galactose linked to N-acetylglucosamine or N-acetylgalactosamine (Gal-GlcNAc/Gal-GalNAc) residues on their cell surface markers. Interestingly, some similar alterations were observed in serum proteins, including immunoglobulins. These findings indicate that any perturbation of the natural glycosylation process in B cells could result in the development of pathogenic autoantibodies. The B cell glycoprofile can be established as a preferred biomarker for characterising pathologies and adapted therapeutics can be used for patients if there is a correlation between the extent of these alterations and the severity of the autoimmune diseases.
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Affiliation(s)
- Marie Morel
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
| | - Pierre Pochard
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
- Laboratoire d'Immunologie et d'Immunothérapie, CHU de Brest, Brest, France
| | - Wiam Echchih
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
| | - Maryvonne Dueymes
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
- Laboratoire d'Immunologie et d'Immunothérapie, CHU de Brest, Brest, France
| | - Cristina Bagacean
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
- Laboratoire d'Immunologie et d'Immunothérapie, CHU de Brest, Brest, France
| | - Sandrine Jousse-Joulin
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
- Laboratoire d'Immunologie et d'Immunothérapie, CHU de Brest, Brest, France
| | - Valérie Devauchelle-Pensec
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
- Laboratoire d'Immunologie et d'Immunothérapie, CHU de Brest, Brest, France
| | - Divi Cornec
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
- Laboratoire d'Immunologie et d'Immunothérapie, CHU de Brest, Brest, France
| | - Christophe Jamin
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
- Laboratoire d'Immunologie et d'Immunothérapie, CHU de Brest, Brest, France
| | - Jacques-Olivier Pers
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
- Laboratoire d'Immunologie et d'Immunothérapie, CHU de Brest, Brest, France
| | - Anne Bordron
- LBAI, UMR1227, Univ Brest, Inserm, Brest, France
- *Correspondence: Anne Bordron,
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10
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Comparative lectin histochemistry on the murine respiratory tract and primary olfactory pathway using a fully automated staining procedure. Acta Histochem 2022; 124:151877. [PMID: 35303511 DOI: 10.1016/j.acthis.2022.151877] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/08/2022] [Accepted: 03/09/2022] [Indexed: 01/07/2023]
Abstract
Lectins are naturally occurring molecules which bind to specific carbohydrates of glycoconjugates. The binding specificity of lectins can therefore be used to specifically elucidate the glycosylation pattern in various tissues. While lectin histochemistry is usually carried out manually on single slides, a fully automated immunostaining system offers an easy, standardized, and high throughput system. In this study lectin histochemistry was implemented and optimized on a fully automated immunostaining system to investigate glycosylation patterns in the murine respiratory tract and the primary olfactory pathway. We tested 22 commercially available biotinylated lectins for their labelling-profiles to specifically identify morphologic structures. The results showed that lectin staining profiles using the implemented protocol on the automated system were constant and suitable for high throughput morphological studies. Further, the morphological evaluation of the stained slides revealed a complete characterization of the murine respiratory tract and primary olfactory pathway including the lectin binding profiles for the olfactory bulb, the vomeronasal organ and the nasal-associated lymphoid tissue.
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11
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Xu X, Balmer L, Chen Z, Mahara G, Lin L. The role of IgG N-galactosylation in Spondyloarthritis. TRANSLATIONAL METABOLIC SYNDROME RESEARCH 2022. [DOI: 10.1016/j.tmsr.2022.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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12
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Lundstrøm J, Korhonen E, Lisacek F, Bojar D. LectinOracle: A Generalizable Deep Learning Model for Lectin-Glycan Binding Prediction. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103807. [PMID: 34862760 PMCID: PMC8728848 DOI: 10.1002/advs.202103807] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/03/2021] [Indexed: 05/07/2023]
Abstract
Ranging from bacterial cell adhesion over viral cell entry to human innate immunity, glycan-binding proteins or lectins are abound in nature. Widely used as staining and characterization reagents in cell biology and crucial for understanding the interactions in biological systems, lectins are a focal point of study in glycobiology. Yet the sheer breadth and depth of specificity for diverse oligosaccharide motifs has made studying lectins a largely piecemeal approach, with few options to generalize. Here, LectinOracle, a model combining transformer-based representations for proteins and graph convolutional neural networks for glycans to predict their interaction, is presented. Using a curated data set of 564,647 unique protein-glycan interactions, it is shown that LectinOracle predictions agree with literature-annotated specificities for a wide range of lectins. Using a range of specialized glycan arrays, it is shown that LectinOracle predictions generalize to new glycans and lectins, with qualitative and quantitative agreement with experimental data. It is further demonstrated that LectinOracle can be used to improve lectin classification, accelerate lectin directed evolution, predict epidemiological outcomes in the context of influenza virus, and analyze whole lectomes in host-microbe interactions. It is envisioned that the herein presented platform will advance both the study of lectins and their role in (glyco)biology.
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Affiliation(s)
- Jon Lundstrøm
- Department of Chemistry and Molecular BiologyUniversity of GothenburgGothenburg41390Sweden
- Wallenberg Centre for Molecular and Translational MedicineUniversity of GothenburgGothenburg41390Sweden
| | - Emma Korhonen
- Department of Chemistry and Molecular BiologyUniversity of GothenburgGothenburg41390Sweden
- Wallenberg Centre for Molecular and Translational MedicineUniversity of GothenburgGothenburg41390Sweden
| | - Frédérique Lisacek
- Swiss Institute of BioinformaticsGeneva1227Switzerland
- Computer Science DepartmentUniGeGeneva1227Switzerland
- Section of BiologyUniGeGeneva1205Switzerland
| | - Daniel Bojar
- Department of Chemistry and Molecular BiologyUniversity of GothenburgGothenburg41390Sweden
- Wallenberg Centre for Molecular and Translational MedicineUniversity of GothenburgGothenburg41390Sweden
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13
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Purification and characterization of a highly thermostable GlcNAc-binding lectin from Collaea speciosa seeds. Int J Biol Macromol 2021; 193:1562-1571. [PMID: 34740693 DOI: 10.1016/j.ijbiomac.2021.10.219] [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: 09/06/2021] [Revised: 10/29/2021] [Accepted: 10/29/2021] [Indexed: 11/21/2022]
Abstract
Lectins from plants of the Diocleinae subtribe often exhibit specificity towards mannose/glucose and derived sugars, with some plants also displaying a second lectin specific to lactose/GalNAc. Here, we present a novel lectin from Collaea speciosa, named CsL, that displays specificity for GlcNAc/glucose. The lectin was extracted from Collaea speciosa seeds and purified by a single chromatographic step on a Sephadex G-50 matrix. In solution, the lectin appears as a dimeric protein composed of 25 kDa monomers. The protein is stable at pH 7-8 and dependent on divalent cations. CsL maintained its agglutination activity after heating to 90 °C for 1 h. Glycan array studies revealed that CsL binds to N-glycans with terminal GlcNAc residues, chitobiose and chitotriose moieties. The partial amino acid sequence of the lectin is similar to that of some lactose-specific lectins from the same subtribe. In contrast to other ConA-like lectins, CsL is not toxic to Artemia. Because of its remarkably different properties and specificity, this lectin could be the first member of a new group inside the Diocleinae lectins.
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14
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Chatterjee S, Ugonotti J, Lee LY, Everest-Dass A, Kawahara R, Thaysen-Andersen M. Trends in oligomannosylation and α1,2-mannosidase expression in human cancers. Oncotarget 2021; 12:2188-2205. [PMID: 34676051 PMCID: PMC8522845 DOI: 10.18632/oncotarget.28064] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 08/18/2021] [Indexed: 02/05/2023] Open
Abstract
Aberrant protein glycosylation is a prominent cancer feature. While many tumour-associated glycoepitopes have been reported, advances in glycoanalytics continue to uncover new associations between glycosylation and cancer. Guided by a comprehensive literature survey suggesting that oligomannosylation (Man5–9 GlcNAc2) is a widespread and often regulated glycosignature in human cancers, we here revisit a valuable compilation of nearly 500 porous graphitized carbon LC-MS/MS N-glycomics datasets acquired across 11 human cancer types to systematically test for oligomannose-cancer associations. Firstly, the quantitative glycomics data obtained across 34 cancerous cell lines demonstrated that oligomannosylation is a pan-cancer feature spanning in a wide abundance range. In keeping with literature, our quantitative glycomics data of tumour and matching control tissues and new MALDI-MS imaging data of tissue microarrays showed a strong cancer-associated elevation of oligomannosylation in both basal cell (p = 1.78 × 10–12) and squamous cell (p = 1.23 × 10–11) skin cancer and colorectal cancer (p = 8.0 × 10–4). The glycomics data also indicated that some cancer types including gastric and liver cancer exhibit unchanged or reduced oligomannose levels, observations also supported by literature and MALDI-MS imaging data. Finally, expression data from public cancer repositories indicated that several α1,2-mannosidases are regulated in tumour tissues suggesting that these glycan-processing enzymes may contribute to the cancer-associated modulation of oligomannosylation. This omics-centric study has compiled robust glycomics and enzyme expression data revealing interesting molecular trends that open avenues to better understand the role of oligomannosylation in human cancers.
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Affiliation(s)
| | - Julian Ugonotti
- Department of Molecular Sciences, Macquarie University, Sydney, Australia
| | - Ling Y Lee
- Department of Molecular Sciences, Macquarie University, Sydney, Australia
| | | | - Rebeca Kawahara
- Department of Molecular Sciences, Macquarie University, Sydney, Australia.,Joint senior authors
| | - Morten Thaysen-Andersen
- Department of Molecular Sciences, Macquarie University, Sydney, Australia.,Biomolecular Discovery Research Centre (BDRC), Macquarie University, Sydney, Australia.,Joint senior authors
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15
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Hao N, Zou X, Lin X, Cai R, Xiao W, Tong T, Yin H, Sun A, Guo X. LecRK-Ⅷ.2 mediates the cross-talk between sugar and brassinosteroid during hypocotyl elongation in Arabidopsis. REPRODUCTION AND BREEDING 2021. [DOI: 10.1016/j.repbre.2021.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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16
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Rao NRH, Granville AM, Henderson RK. Understanding variability in algal solid-liquid separation process outcomes by manipulating extracellular protein-carbohydrate interactions. WATER RESEARCH 2021; 190:116747. [PMID: 33385876 DOI: 10.1016/j.watres.2020.116747] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/09/2020] [Accepted: 12/12/2020] [Indexed: 06/12/2023]
Abstract
Coagulation-flocculation followed by sedimentation or dissolved air flotation (DAF) are processes routinely used for separating microalgae from water; however, during algae separation then can exhibit inconsistent separation, high coagulant demand, and high operating cost. To circumvent these problems, previous studies reported the development of a novel DAF process in which bubbles were modified instead of particles. While this process was shown to be sustainable and inexpensive, the problem of inconsistent algal separation across species remained. Recent research has suggested that this could be due to the varying concentration and character of algal-derived proteins and carbohydrates within the extracellular organic matter (EOM) and their associated interactions. This hypothesis is tested in the current study using the novel modified-bubble DAF process, which has been highly susceptible to EOM protein and carbohydrate concentrations and character. Biomolecular additives (commercially available proteins and carbohydrates, and algal-extracted proteins) of widely differing molecular weight (MW) and charge were dosed in varying proportions into samples containing either Chlorella vulgaris CS-42/7, Microcystis aeruginosa CS-564/01, or Microcystis aeruginosa CS-555/1 after removing the intrinsic EOM. These cell-rich suspensions were then subject to flotation using cationic bubbles modified with poly(diallyldimethylammonium chloride) (PDADMAC). When additives were dosed independently, separation increased from <5% to up to 62%. The maximum separation was obtained when the dose was double the respective biopolymer concentration measured in the intrinsic EOM for the equivalent species, and, in the case of protein additives, when MW and charge were >50 kDa, and >0.5 meq·g-1, respectively, irrespective of the species tested. When evaluating steric- and charge-based protein-carbohydrate interactions on cell separation by simultaneously dosing high MW and high charge protein- and carbohydrate-additives, enhanced separation of up to 79% was achieved. It is suggested that enhanced cell separation is achieved due to proteins and carbohydrates bridging with cells and forming protein-carbohydrate-cell suprastructures in the presence of a flocculant, e.g. PDADMAC, and this only occurs when the intrinsic EOM comprises proteins and carbohydrates that have high MW (>25 kDa) and charge (>0.2 meq·g-1), and interactions with each other and with the cell surface.
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Affiliation(s)
- N R H Rao
- Algae and Organic Matter Laboratory (AOM Lab), School of Chemical Engineering, The University of New South Wales, Sydney, Australia; Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, The University of New South Wales, Sydney, Australia
| | - A M Granville
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, The University of New South Wales, Sydney, Australia
| | - R K Henderson
- Algae and Organic Matter Laboratory (AOM Lab), School of Chemical Engineering, The University of New South Wales, Sydney, Australia.
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17
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Uthailak N, Kajiura H, Misaki R, Fujiyama K. Transient Production of Human β-Glucocerebrosidase With Mannosidic-Type N-Glycan Structure in Glycoengineered Nicotiana benthamiana Plants. FRONTIERS IN PLANT SCIENCE 2021; 12:683762. [PMID: 34163514 PMCID: PMC8215604 DOI: 10.3389/fpls.2021.683762] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 05/07/2021] [Indexed: 05/02/2023]
Abstract
Gaucher disease is an inherited lysosomal storage disorder caused by a deficiency of functional enzyme β-glucocerebrosidase (GCase). Recombinant GCase has been used in enzyme replacement therapy to treat Gaucher disease. Importantly, the terminal mannose N-glycan structure is essential for the uptake of recombinant GCase into macrophages via the mannose receptor. In this research, recombinant GCase was produced using Agrobacterium-mediated transient expression in both wild-type (WT) and N-acetylglucosaminyltransferase I (GnTI) downregulated Nicotiana benthamiana (ΔgntI) plants, the latter of which accumulates mannosidic-type N-glycan structures. The successfully produced functional GCase exhibited GCase enzyme activity. The enzyme activity was the same as that of the conventional mammalian-derived GCase. Notably, N-glycan analysis revealed that a mannosidic-type N-glycan structure lacking plant-specific N-glycans (β1,2-xylose and α1,3-fucose residues) was predominant in all glycosylation sites of purified GCase produced from ΔgntI plants. Our research provides a promising alternative plant line as a host for the production of recombinant GCase with a mannosidic-type N-glycan structure. This glycoengineered plant might be applicable to the production of other pharmaceutical proteins, especially mannose receptor targeted protein, for therapeutic uses.
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Affiliation(s)
| | - Hiroyuki Kajiura
- International Center for Biotechnology, Osaka University, Osaka, Japan
- Industrial Biotechnology Initiative Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Osaka, Japan
| | - Ryo Misaki
- International Center for Biotechnology, Osaka University, Osaka, Japan
- Industrial Biotechnology Initiative Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Osaka, Japan
| | - Kazuhito Fujiyama
- International Center for Biotechnology, Osaka University, Osaka, Japan
- Industrial Biotechnology Initiative Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Osaka, Japan
- Cooperative Research Station in Southeast Asia, International Center for Biotechnology, Osaka University, Mahidol University, Bangkok, Thailand
- *Correspondence: Kazuhito Fujiyama
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18
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Aberrant glycosylation in schizophrenia: a review of 25 years of post-mortem brain studies. Mol Psychiatry 2020; 25:3198-3207. [PMID: 32404945 PMCID: PMC8081047 DOI: 10.1038/s41380-020-0761-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 04/18/2020] [Accepted: 04/24/2020] [Indexed: 02/06/2023]
Abstract
Glycosylation, the enzymatic attachment of carbohydrates to proteins and lipids, regulates nearly all cellular processes and is critical in the development and function of the nervous system. Axon pathfinding, neurite outgrowth, synaptogenesis, neurotransmission, and many other neuronal processes are regulated by glycans. Over the past 25 years, studies analyzing post-mortem brain samples have found evidence of aberrant glycosylation in individuals with schizophrenia. Proteins involved in both excitatory and inhibitory neurotransmission display altered glycans in the disease state, including AMPA and kainate receptor subunits, glutamate transporters EAAT1 and EAAT2, and the GABAA receptor. Polysialylated NCAM (PSA-NCAM) and perineuronal nets, highly glycosylated molecules critical for axonal migration and synaptic stabilization, are both downregulated in multiple brain regions of individuals with schizophrenia. In addition, enzymes spanning several pathways of glycan synthesis show differential expression in brains of individuals with schizophrenia. These changes may be due to genetic predisposition, environmental perturbations, medication use, or a combination of these factors. However, the recent association of several enzymes of glycosylation with schizophrenia by genome-wide association studies underscores the importance of glycosylation in this disease. Understanding how glycosylation is dysregulated in the brain will further our understanding of how this pathway contributes to the development and pathophysiology of schizophrenia.
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19
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Rubén LC, Laura MR, Almudena FB, Emilio GM. Glycan array analysis of Pholiota squarrosa lectin and other fucose-oriented lectins. Glycobiology 2020; 31:459-476. [PMID: 33021632 DOI: 10.1093/glycob/cwaa093] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 09/23/2020] [Accepted: 09/23/2020] [Indexed: 12/14/2022] Open
Abstract
The α(1,6)fucose residue attached to the N-glycoprotein core is suspected to play an essential role in the progression of several types of cancer. Lectins remain the first choice for probing glycan modifications, although they may lack specificity. Thus, efforts have been made to identify new lectins with a narrower core fucose (CF) detection profile. Here, we present a comparison of the classical Aleuria aurantia lectin (AAL), Lens culinaris agglutinin (LCA) and Aspergillus oryzae lectin (AOL) with the newer Pholiota squarrosa lectin (PhoSL), which has been described as being specific for core fucosylated N-glycans. To this end, we studied the binding profiles of the four lectins using mammalian glycan arrays from the Consortium of Functional Glycomics. To validate their glycan specificity, we probed AOL, LCA and PhoSL in western-blot assays using protein extracts from eight common colorectal cancer (CRC) lines and colorectal biopsies from a small cohort of patients with CRC. The results showed that (i) LCA and PhoSL were the most specific lectins for detecting the presence of CF in a concentration-dependent manner; (ii) PhoSL exhibited the highest N-glycan sequence restriction, with preferential binding to core fucosylated paucimannosidic-type N-glycans, (iii) the recognition ability of PhoSL was highly influenced by the presence of terminal N-acetyl-lactosamine; (iv) LCA bound to paucimannosidic, bi-antennary and tri-antennary core fucosylated N-glycans and (v) AOL and AAL exhibited broader specificity towards fucosylation. Together, our results support the choice of LCA as the most appropriate lectin for CF detection, as validated in protein extracts from CRC cell lines and tissue specimens from patients with CRC.
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Affiliation(s)
- López-Cortés Rubén
- Doctoral Program in Methods and Applications in Life Sciences, Faculty of Biology, Universidade de Vigo, Campus Lagoas-Marcosende, Vigo, Pontevedra, Galicia ES36310, Spain
| | - Muinelo-Romay Laura
- Liquid Biopsy Analysis Unit, Translational Medical Oncology (Oncomet), Health Research Institute of Santiago de Compostela (IDIS), CIBERONC, Travesía da Choupana, Santiago de Compostela, A Coruña, Galicia ES15706, Spain
| | - Fernández-Briera Almudena
- Molecular Biomarkers, Biomedical Research Centre (CINBIO), Universidade de Vigo, Campus Lagoas-Marcosende, Vigo, Pontevedra, Galicia ES36310, Spain
| | - Gil Martín Emilio
- Nutrition and Food Science Group, Department of Biochemistry, Genetics and Immunology, Faculty of Biology, Universidade de Vigo. Campus Lagoas-Marcosende, Vigo, Pontevedra, Galicia ES36310, Spain
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20
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Oinam L, Changarathil G, Raja E, Ngo YX, Tateno H, Sada A, Yanagisawa H. Glycome profiling by lectin microarray reveals dynamic glycan alterations during epidermal stem cell aging. Aging Cell 2020; 19:e13190. [PMID: 32681764 PMCID: PMC7431822 DOI: 10.1111/acel.13190] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 05/01/2020] [Accepted: 06/06/2020] [Indexed: 12/02/2022] Open
Abstract
Aging in the epidermis is marked by a gradual decline in barrier function, impaired wound healing, hair loss, and an increased risk of cancer. This could be due to age‐related changes in the properties of epidermal stem cells and defective interactions with their microenvironment. Currently, no biochemical tools are available to detect and evaluate the aging of epidermal stem cells. The cellular glycosylation is involved in cell–cell communications and cell–matrix adhesions in various physiological and pathological conditions. Here, we explored the changes of glycans in epidermal stem cells as a potential biomarker of aging. Using lectin microarray, we performed a comprehensive glycan profiling of freshly isolated epidermal stem cells from young and old mouse skin. Epidermal stem cells exhibited a significant difference in glycan profiles between young and old mice. In particular, the binding of a mannose‐binder rHeltuba was decreased in old epidermal stem cells, whereas that of an α2‐3Sia‐binder rGal8N increased. These glycan changes were accompanied by upregulation of sialyltransferase, St3gal2 and St6gal1 and mannosidase Man1a genes in old epidermal stem cells. The modification of cell surface glycans by overexpressing these glycogenes leads to a defect in the regenerative ability of epidermal stem cells in culture. Hence, our study suggests the age‐related global alterations in cellular glycosylation patterns and its potential contribution to the stem cell function. These glycan modifications detected by lectins may serve as molecular markers for aging, and further functional studies will lead us to a better understanding of the process of skin aging.
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Affiliation(s)
- Lalhaba Oinam
- Life Science Center for Survival Dynamics Tsukuba Advanced Research Alliance (TARA) University of Tsukuba Tsukuba Japan
- Ph.D. Program in Human Biology School of Integrative and Global Majors University of Tsukuba Tsukuba Japan
| | - Gopakumar Changarathil
- Life Science Center for Survival Dynamics Tsukuba Advanced Research Alliance (TARA) University of Tsukuba Tsukuba Japan
- Graduate School of Comprehensive Human Sciences University of Tsukuba Tsukuba Japan
| | - Erna Raja
- Life Science Center for Survival Dynamics Tsukuba Advanced Research Alliance (TARA) University of Tsukuba Tsukuba Japan
- International Research Center for Medical Sciences (IRCMS) Kumamoto University Kumamoto Japan
| | - Yen Xuan Ngo
- Life Science Center for Survival Dynamics Tsukuba Advanced Research Alliance (TARA) University of Tsukuba Tsukuba Japan
- Ph.D. Program in Human Biology School of Integrative and Global Majors University of Tsukuba Tsukuba Japan
| | - Hiroaki Tateno
- Life Science Center for Survival Dynamics Tsukuba Advanced Research Alliance (TARA) University of Tsukuba Tsukuba Japan
- Cellular and Molecular Biotechnology Research Institute National Institute of Advanced Industrial Science and Technology Tsukuba Japan
| | - Aiko Sada
- Life Science Center for Survival Dynamics Tsukuba Advanced Research Alliance (TARA) University of Tsukuba Tsukuba Japan
- International Research Center for Medical Sciences (IRCMS) Kumamoto University Kumamoto Japan
| | - Hiromi Yanagisawa
- Life Science Center for Survival Dynamics Tsukuba Advanced Research Alliance (TARA) University of Tsukuba Tsukuba Japan
- Faculty of Medicine University of Tsukuba Tsukuba Japan
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21
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Mondragon-Shem K, Wongtrakul-Kish K, Kozak RP, Yan S, Wilson IBH, Paschinger K, Rogers ME, Spencer DIR, Acosta-Serrano A. Insights into the salivary N-glycome of Lutzomyia longipalpis, vector of visceral leishmaniasis. Sci Rep 2020; 10:12903. [PMID: 32737362 PMCID: PMC7395719 DOI: 10.1038/s41598-020-69753-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 07/14/2020] [Indexed: 01/08/2023] Open
Abstract
During Leishmania transmission sand flies inoculate parasites and saliva into the skin of vertebrates. Saliva has anti-haemostatic and anti-inflammatory activities that evolved to facilitate bloodfeeding, but also modulate the host's immune responses. Sand fly salivary proteins have been extensively studied, but the nature and biological roles of protein-linked glycans remain overlooked. Here, we characterised the profile of N-glycans from the salivary glycoproteins of Lutzomyia longipalpis, vector of visceral leishmaniasis in the Americas. In silico predictions suggest half of Lu. longipalpis salivary proteins may be N-glycosylated. SDS-PAGE coupled to LC-MS analysis of sand fly saliva, before and after enzymatic deglycosylation, revealed several candidate glycoproteins. To determine the diversity of N-glycan structures in sand fly saliva, enzymatically released sugars were fluorescently tagged and analysed by HPLC, combined with highly sensitive LC-MS/MS, MALDI-TOF-MS, and exoglycosidase treatments. We found that the N-glycan composition of Lu. longipalpis saliva mostly consists of oligomannose sugars, with Man5GlcNAc2 being the most abundant, and a few hybrid-type species. Interestingly, some glycans appear modified with a group of 144 Da, whose identity has yet to be confirmed. Our work presents the first detailed structural analysis of sand fly salivary glycans.
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Affiliation(s)
- Karina Mondragon-Shem
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK
| | - Katherine Wongtrakul-Kish
- Ludger Ltd., Culham Science Centre, Oxfordshire, OX14 3EB, UK
- Australian Research Council Centre of Excellence for Nanoscale Biophotonics, Macquarie University, Sydney, Australia
| | | | - Shi Yan
- Department of Chemistry, University of Natural Resources and Life Sciences, 1190, Vienna, Austria
- Institute of Parasitology, Department of Pathobiology, University of Veterinary Medicine, A-1210, Vienna, Austria
| | - Iain B H Wilson
- Department of Chemistry, University of Natural Resources and Life Sciences, 1190, Vienna, Austria
| | - Katharina Paschinger
- Department of Chemistry, University of Natural Resources and Life Sciences, 1190, Vienna, Austria
| | - Matthew E Rogers
- Department of Disease Control, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, UK
| | | | - Alvaro Acosta-Serrano
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK.
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22
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Li L, Guan W, Zhang G, Wu Z, Yu H, Chen X, Wang PG. Microarray analyses of closely related glycoforms reveal different accessibilities of glycan determinants on N-glycan branches. Glycobiology 2020; 30:334-345. [PMID: 32026940 PMCID: PMC7175966 DOI: 10.1093/glycob/cwz100] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 11/27/2019] [Accepted: 12/02/2019] [Indexed: 01/03/2023] Open
Abstract
Glycans mediate a wide variety of biological roles via recognition by glycan-binding proteins (GBPs). Comprehensive knowledge of such interaction is thus fundamental to glycobiology. While the primary binding feature of GBPs can be easily uncovered by using a simple glycan microarray harboring limited numbers of glycan motifs, their fine specificities are harder to interpret. In this study, we prepared 98 closely related N-glycoforms that contain 5 common glycan epitopes which allowed the determination of the fine binding specificities of several plant lectins and anti-glycan antibodies. These N-glycoforms differ from each other at the monosaccharide level and were presented in an identical format to ensure comparability. With the analysis platform we used, it was found that most tested GBPs have preferences toward only one branch of the complex N-glycans, and their binding toward the epitope-presenting branch can be significantly affected by structures on the other branch. Fine specificities described here are valuable for a comprehensive understanding and applications of GBPs.
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Affiliation(s)
- Lei Li
- Department of Chemistry, Georgia State University, Atlanta, GA 30303, USA
| | - Wanyi Guan
- Department of Chemistry, Georgia State University, Atlanta, GA 30303, USA
| | - Gaolan Zhang
- Department of Chemistry, Georgia State University, Atlanta, GA 30303, USA
| | - Zhigang Wu
- Department of Chemistry, Georgia State University, Atlanta, GA 30303, USA
| | - Hai Yu
- Department of Chemistry, Georgia State University, Atlanta, GA 30303, USA
| | - Xi Chen
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA, 95616, USA
| | - Peng G Wang
- Department of Chemistry, Georgia State University, Atlanta, GA 30303, USA
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23
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Coff L, Chan J, Ramsland PA, Guy AJ. Identifying glycan motifs using a novel subtree mining approach. BMC Bioinformatics 2020; 21:42. [PMID: 32019496 PMCID: PMC7001330 DOI: 10.1186/s12859-020-3374-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 01/20/2020] [Indexed: 11/17/2022] Open
Abstract
Background Glycans are complex sugar chains, crucial to many biological processes. By participating in binding interactions with proteins, glycans often play key roles in host–pathogen interactions. The specificities of glycan-binding proteins, such as lectins and antibodies, are governed by motifs within larger glycan structures, and improved characterisations of these determinants would aid research into human diseases. Identification of motifs has previously been approached as a frequent subtree mining problem, and we extend these approaches with a glycan notation that allows recognition of terminal motifs. Results In this work, we customised a frequent subtree mining approach by altering the glycan notation to include information on terminal connections. This allows specific identification of terminal residues as potential motifs, better capturing the complexity of glycan-binding interactions. We achieved this by including additional nodes in a graph representation of the glycan structure to indicate the presence or absence of a linkage at particular backbone carbon positions. Combining this frequent subtree mining approach with a state-of-the-art feature selection algorithm termed minimum-redundancy, maximum-relevance (mRMR), we have generated a classification pipeline that is trained on data from a glycan microarray. When applied to a set of commonly used lectins, the identified motifs were consistent with known binding determinants. Furthermore, logistic regression classifiers trained using these motifs performed well across most lectins examined, with a median AUC value of 0.89. Conclusions We present here a new subtree mining approach for the classification of glycan binding and identification of potential binding motifs. The Carbohydrate Classification Accounting for Restricted Linkages (CCARL) method will assist in the interpretation of glycan microarray experiments and will aid in the discovery of novel binding motifs for further experimental characterisation.
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Affiliation(s)
- Lachlan Coff
- School of Science, College of Science, Engineering and Health, RMIT University, 3000, Melbourne, Australia
| | - Jeffrey Chan
- School of Science, College of Science, Engineering and Health, RMIT University, 3000, Melbourne, Australia
| | - Paul A Ramsland
- School of Science, College of Science, Engineering and Health, RMIT University, 3000, Melbourne, Australia.,Department of Immunology, Monash University, 3004, Melbourne, Australia.,Department of Surgery Austin Health, University of Melbourne, 3084, Heidelberg, Australia
| | - Andrew J Guy
- School of Science, College of Science, Engineering and Health, RMIT University, 3000, Melbourne, Australia.
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24
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Haab BB, Klamer Z. Advances in Tools to Determine the Glycan-Binding Specificities of Lectins and Antibodies. Mol Cell Proteomics 2020; 19:224-232. [PMID: 31848260 PMCID: PMC7000120 DOI: 10.1074/mcp.r119.001836] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/13/2019] [Indexed: 01/17/2023] Open
Abstract
Proteins that bind carbohydrate structures can serve as tools to quantify or localize specific glycans in biological specimens. Such proteins, including lectins and glycan-binding antibodies, are particularly valuable if accurate information is available about the glycans that a protein binds. Glycan arrays have been transformational for uncovering rich information about the nuances and complexities of glycan-binding specificity. A challenge, however, has been the analysis of the data. Because protein-glycan interactions are so complex, simplistic modes of analyzing the data and describing glycan-binding specificities have proven inadequate in many cases. This review surveys the methods for handling high-content data on protein-glycan interactions. We contrast the approaches that have been demonstrated and provide an overview of the resources that are available. We also give an outlook on the promising experimental technologies for generating new insights into protein-glycan interactions, as well as a perspective on the limitations that currently face the field.
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25
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Szabó E, Hornung Á, Monostori É, Bocskai M, Czibula Á, Kovács L. Altered Cell Surface N-Glycosylation of Resting and Activated T Cells in Systemic Lupus Erythematosus. Int J Mol Sci 2019; 20:ijms20184455. [PMID: 31509989 PMCID: PMC6770513 DOI: 10.3390/ijms20184455] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/03/2019] [Accepted: 09/05/2019] [Indexed: 01/18/2023] Open
Abstract
Altered cell surface glycosylation in congenital and acquired diseases has been shown to affect cell differentiation and cellular responses to external signals. Hence, it may have an important role in immune regulation; however, T cell surface glycosylation has not been studied in systemic lupus erythematosus (SLE), a prototype of autoimmune diseases. Analysis of the glycosylation of T cells from patients suffering from SLE was performed by lectin-binding assay, flow cytometry, and quantitative real-time PCR. The results showed that resting SLE T cells presented an activated-like phenotype in terms of their glycosylation pattern. Additionally, activated SLE T cells bound significantly less galectin-1 (Gal-1), an important immunoregulatory lectin, while other lectins bound similarly to the controls. Differential lectin binding, specifically Gal-1, to SLE T cells was explained by the increased gene expression ratio of sialyltransferases and neuraminidase 1 (NEU1), particularly by elevated ST6 beta-galactosamide alpha-2,6-sialyltranferase 1 (ST6GAL1)/NEU1 and ST3 beta-galactoside alpha-2,3-sialyltransferase 6 (ST3GAL6)/NEU1 ratios. These findings indicated an increased terminal sialylation. Indeed, neuraminidase treatment of cells resulted in the increase of Gal-1 binding. Altered T cell surface glycosylation may predispose the cells to resistance to the immunoregulatory effects of Gal-1, and may thus contribute to the pathomechanism of SLE.
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Affiliation(s)
- Enikő Szabó
- Institute of Genetics, Biological Research Centre of the Hungarian Academy of Sciences 6726 Szeged, Hungary.
| | - Ákos Hornung
- Department of Rheumatology and Immunology, Faculty of Medicine, University of Szeged, 6725 Szeged, Hungary
| | - Éva Monostori
- Institute of Genetics, Biological Research Centre of the Hungarian Academy of Sciences 6726 Szeged, Hungary.
| | - Márta Bocskai
- Department of Rheumatology and Immunology, Faculty of Medicine, University of Szeged, 6725 Szeged, Hungary.
| | - Ágnes Czibula
- Institute of Genetics, Biological Research Centre of the Hungarian Academy of Sciences 6726 Szeged, Hungary.
| | - László Kovács
- Department of Rheumatology and Immunology, Faculty of Medicine, University of Szeged, 6725 Szeged, Hungary.
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26
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Park MH, You JW, Kim HJ, Kim HJ. IgG and IgM responses to human papillomavirus L1 virus-like particle as a function of dosing schedule and vaccine formulation. J Microbiol 2019; 57:821-827. [PMID: 31452045 DOI: 10.1007/s12275-019-9308-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 06/29/2019] [Accepted: 07/01/2019] [Indexed: 01/26/2023]
Abstract
Most commercialized virus-like particle (VLP) vaccines use aluminum salt as adjuvant, even though VLPs provoke adequate antibody responses without adjuvant. We do not have detailed knowledge of how adjuvant affects the profile of anti-VLP antibodies. Meanwhile, there is evidence that differences between vaccination protocols influence the glycosylation of antibodies, which may alter their effector functions. In the present study a murine model was used to investigate the effects of dosing schedule and adjuvant on the antibody profiles and glycosylation levels of antigen-specific antibody responses to human papillomavirus type 16 L1 (HPV16 L1) VLPs. Mice received subcutaneously 2,000 ng of antigen divided into 4 or 7 doses. The HPV16 L1 VLPs elicited > 4 log10 anti-HPV16 L1 IgG titers without adjuvant, and aluminum hydroxide as adjuvant increased IgG titers 1.3- to 4-fold and reduced the anti-HPV16 L1 IgG2a / anti-HPV16 L1 IgG1 ratio value (use of aluminum hydroxide reduced the ratio of the IgG2a). Immunization with HPV16 L1 VLPs in combination with Freund's adjuvant enhanced IgG titers 5- to 12-fold. Seven-dose immunization markedly increased anti-HPV16 L1 IgM titers compared to four-dose immunization, as well as increasing the proportion of glycosylated antibodies. Our results suggest that antibody glycosylation can be controlled immunologically, and IgG and IgM profiles and glycosylation profiles of the vaccine-induced antibodies can be used as indicators reflecting the vaccine characteristics. These results indicate that the HPV16 L1 VLP dosing schedule can affect the quality of antigen-specific antibody responses. We suggest that dosing schedules should be noted in vaccination protocols for VLP-based vaccines.
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Affiliation(s)
- Min-Hye Park
- Laboratory of Virology, College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Ji Won You
- Laboratory of Virology, College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Hyoung Jin Kim
- Laboratory of Virology, College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Hong-Jin Kim
- Laboratory of Virology, College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea.
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27
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Cavada BS, Osterne VJS, Lossio CF, Pinto-Junior VR, Oliveira MV, Silva MTL, Leal RB, Nascimento KS. One century of ConA and 40 years of ConBr research: A structural review. Int J Biol Macromol 2019; 134:901-911. [DOI: 10.1016/j.ijbiomac.2019.05.100] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/16/2019] [Accepted: 05/16/2019] [Indexed: 01/30/2023]
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28
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Cavada BS, Pinto-Junior VR, Osterne VJS, Nascimento KS. ConA-Like Lectins: High Similarity Proteins as Models to Study Structure/Biological Activities Relationships. Int J Mol Sci 2018; 20:ijms20010030. [PMID: 30577614 PMCID: PMC6337138 DOI: 10.3390/ijms20010030] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 12/17/2018] [Accepted: 12/19/2018] [Indexed: 01/03/2023] Open
Abstract
Lectins are a widely studied group of proteins capable of specific and reversible binding to carbohydrates. Undoubtedly, the best characterized are those extracted from plants of the Leguminosae family. Inside this group of proteins, those from the Diocleinae subtribe have attracted attention, in particular Concanavalin A (ConA), the best-studied lectin of the group. Diocleinae lectins, also called ConA-like lectins, present a high similarity of sequence and three-dimensional structure and are known to present inflammatory, vasoactive, antibiotic, immunomodulatory and antitumor activities, among others. This high similarity of lectins inside the ConA-like group makes it possible to use them to study structure/biological activity relationships by the variability of both carbohydrate specificity and biological activities results. It is in this context the following review aims to summarize the most recent data on the biochemical and structural properties, as well as biological activities, of ConA-like lectins and the use of these lectins as models to study structure/biological activity relationships.
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Affiliation(s)
- Benildo S Cavada
- BioMol-Lab, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza-CE 60440-970, Brazil.
| | - Vanir R Pinto-Junior
- BioMol-Lab, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza-CE 60440-970, Brazil.
| | - Vinicius J S Osterne
- BioMol-Lab, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza-CE 60440-970, Brazil.
| | - Kyria S Nascimento
- BioMol-Lab, Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza-CE 60440-970, Brazil.
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29
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Xiang Y, Zhang Y, Sun X, Chai Y, Xu X, Hu Y. Rapid Self-Assembly of Au Nanoparticles on Rigid Mesoporous Yeast-Based Microspheres for Sensitive Immunoassay. ACS APPLIED MATERIALS & INTERFACES 2018; 10:43450-43461. [PMID: 30457828 DOI: 10.1021/acsami.8b16333] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A simple, rapid, inexpensive, eco-friendly, and high-throughput biological strategy for the preparation of functional microspheres on a yeast-cell platform was introduced. Microspheres prepared through the treatment of yeast cells with formaldehyde and decoating buffer exhibited excellent characteristics, such as superior mechanical strength, high sulfhydryl group content, and mesoporous structure. Au nanoparticles (NPs) easily and rapidly self-assembled onto the surfaces of the yeast-based microspheres within 5 min to form rigid yeast@Au microspheres with high monodispersity and uniformity. The rapid formation of yeast@Au microspheres mainly involved the enhancement of sulfhydryl groups and mesoporosity. The yeast@Au microspheres were successfully used in a flow cytometry immunoassay to detect Pseudorabies viral infection events. Signal-to-noise ratio was enhanced by approximately 49.4-fold. The presence of Au NPs on the yeast-based microspheres greatly improved sensitivity by decreasing noise through reducing nonspecific adsorption, highly enhancing the fluorescence signal caused by the surface plasmon resonance effect, and increasing the coupling efficiency of the capture protein. The presented method was used to analyze 81 clinical swine serum specimens. The results obtained by this developed method were compared to those of commercial diagnostic kits. The sensitivity, specificity, and efficiency of the developed method were 92.31, 88.24, and 88.89%, respectively. The excellent characteristics of the yeast@Au microspheres illustrate its great potential for high-throughput immunoassay applications in the fields of disease diagnosis, environmental analysis, and food safety.
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Affiliation(s)
| | | | | | | | - Xiangdong Xu
- School of Public Health , Hebei Medical University , Shijiazhuang 050017 , China
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30
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Kawahara R, Ortega F, Rosa-Fernandes L, Guimarães V, Quina D, Nahas W, Schwämmle V, Srougi M, Leite KRM, Thaysen-Andersen M, Larsen MR, Palmisano G. Distinct urinary glycoprotein signatures in prostate cancer patients. Oncotarget 2018; 9:33077-33097. [PMID: 30237853 PMCID: PMC6145689 DOI: 10.18632/oncotarget.26005] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 07/31/2018] [Indexed: 12/14/2022] Open
Abstract
Novel biomarkers are needed to complement prostate specific antigen (PSA) in prostate cancer (PCa) diagnostic screening programs. Glycoproteins represent a hitherto largely untapped resource with a great potential as specific and sensitive tumor biomarkers due to their abundance in bodily fluids and their dynamic and cancer-associated glycosylation. However, quantitative glycoproteomics strategies to detect potential glycoprotein cancer markers from complex biospecimen are only just emerging. Here, we describe a glycoproteomics strategy for deep quantitative mapping of N- and O-glycoproteins in urine with a view to investigate the diagnostic value of the glycoproteome to discriminate PCa from benign prostatic hyperplasia (BPH), two conditions that remain difficult to clinically stratify. Total protein extracts were obtained, concentrated and digested from urine of six PCa patients (Gleason score 7) and six BPH patients. The resulting peptide mixtures were TMT-labeled and mixed prior to a multi-faceted sample processing including hydrophilic interaction liquid chromatography (HILIC) and titanium dioxide SPE based enrichment, endo-/exoglycosidase treatment and HILIC-HPLC pre-fractionation. The isolated N- and O-glycopeptides were detected and quantified using high resolution mass spectrometry. We accurately quantified 729 N-glycoproteins spanning 1,310 unique N-glycosylation sites and observed 954 and 965 unique intact N- and O-glycopeptides, respectively, across the two disease conditions. Importantly, a panel of 56 intact N-glycopeptides perfectly discriminated PCa and BPH (ROC: AUC = 1). This study has generated a panel of intact glycopeptides that has a potential for PCa detection.
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Affiliation(s)
- Rebeca Kawahara
- Instituto de Ciências Biomédicas, Departamento de Parasitologia, Universidade de São Paulo, USP, São Paulo, Brazil
| | - Fabio Ortega
- Laboratório de Investigação Médica da Disciplina de Urologia da Faculdade de Medicina da USP, LIM55, São Paulo, Brazil
| | - Livia Rosa-Fernandes
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Vanessa Guimarães
- Laboratório de Investigação Médica da Disciplina de Urologia da Faculdade de Medicina da USP, LIM55, São Paulo, Brazil
| | - Daniel Quina
- Instituto de Ciências Biomédicas, Departamento de Parasitologia, Universidade de São Paulo, USP, São Paulo, Brazil
| | - Willian Nahas
- Instituto do Câncer do Estado de São Paulo, ICESP, São Paulo, Brazil
| | - Veit Schwämmle
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Miguel Srougi
- Laboratório de Investigação Médica da Disciplina de Urologia da Faculdade de Medicina da USP, LIM55, São Paulo, Brazil
| | - Katia R M Leite
- Laboratório de Investigação Médica da Disciplina de Urologia da Faculdade de Medicina da USP, LIM55, São Paulo, Brazil
| | | | - Martin R Larsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Giuseppe Palmisano
- Instituto de Ciências Biomédicas, Departamento de Parasitologia, Universidade de São Paulo, USP, São Paulo, Brazil
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31
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Hosoda M, Takahashi Y, Shiota M, Shinmachi D, Inomoto R, Higashimoto S, Aoki-Kinoshita KF. MCAW-DB: A glycan profile database capturing the ambiguity of glycan recognition patterns. Carbohydr Res 2018; 464:44-56. [PMID: 29859376 DOI: 10.1016/j.carres.2018.05.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 05/08/2018] [Accepted: 05/08/2018] [Indexed: 01/17/2023]
Abstract
Glycan-binding protein (GBP) interaction experiments, such as glycan microarrays, are often used to understand glycan recognition patterns. However, oftentimes the interpretation of glycan array experimental data makes it difficult to identify discrete GBP binding patterns due to their ambiguity. It is known that lectins, for example, are non-specific in their binding affinities; the same lectin can bind to different monosaccharides or even different glycan structures. In bioinformatics, several tools to mine the data generated from these sorts of experiments have been developed. These tools take a library of predefined motifs, which are commonly-found glycan patterns such as sialyl-Lewis X, and attempt to identify the motif(s) that are specific to the GBP being analyzed. In our previous work, as opposed to using predefined motifs, we developed the Multiple Carbohydrate Alignment with Weights (MCAW) tool to visualize the state of the glycans being recognized by the GBP under analysis. We previously reported on the effectiveness of our tool and algorithm by analyzing several glycan array datasets from the Consortium of Functional Glycomics (CFG). In this work, we report on our analysis of 1081 data sets which we collected from the CFG, the results of which we have made publicly and freely available as a database called MCAW-DB. We introduce this database, its usage and describe several analysis results. We show how MCAW-DB can be used to analyze glycan-binding patterns of GBPs amidst their ambiguity. For example, the visualization of glycan-binding patterns in MCAW-DB show how they correlate with the concentrations of the samples used in the array experiments. Using MCAW-DB, the patterns of glycans found to bind to various GBP-glycan binding proteins are visualized, indicating the binding "environment" of the glycans. Thus, the ambiguity of glycan recognition is numerically represented, along with the patterns of monosaccharides surrounding the binding region. The profiles in MCAW-DB could potentially be used as predictors of affinity of unknown or novel glycans to particular GBPs by comparing how well they match the existing profiles for those GBPs. Moreover, as the glycan profiles of diseased tissues become available, glycan alignments could also be used to identify glycan biomarkers unique to that tissue. Databases of these alignments may be of great use for drug discovery.
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Affiliation(s)
- Masae Hosoda
- Department of Bioinformatics, Graduate School of Engineering, Soka University, Tokyo, 192-8577, Japan
| | - Yushi Takahashi
- Department of Bioinformatics, Graduate School of Engineering, Soka University, Tokyo, 192-8577, Japan
| | - Masaaki Shiota
- Department of Science and Engineering for Sustainable Innovation, Faculty of Science and Engineering, Soka University, Tokyo, 192-8577, Japan
| | - Daisuke Shinmachi
- Department of Science and Engineering for Sustainable Innovation, Faculty of Science and Engineering, Soka University, Tokyo, 192-8577, Japan
| | - Renji Inomoto
- Department of Bioinformatics, Graduate School of Engineering, Soka University, Tokyo, 192-8577, Japan
| | - Shinichi Higashimoto
- Department of Bioinformatics, Graduate School of Engineering, Soka University, Tokyo, 192-8577, Japan
| | - Kiyoko F Aoki-Kinoshita
- Department of Bioinformatics, Graduate School of Engineering, Soka University, Tokyo, 192-8577, Japan; Department of Science and Engineering for Sustainable Innovation, Faculty of Science and Engineering, Soka University, Tokyo, 192-8577, Japan.
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32
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Bojarová P, Křen V. Sugared biomaterial binding lectins: achievements and perspectives. Biomater Sci 2018; 4:1142-60. [PMID: 27075026 DOI: 10.1039/c6bm00088f] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Lectins, a distinct group of glycan-binding proteins, play a prominent role in the immune system ranging from pathogen recognition and tuning of inflammation to cell adhesion or cellular signalling. The possibilities of their detailed study expanded along with the rapid development of biomaterials in the last decade. The immense knowledge of all aspects of glycan-lectin interactions both in vitro and in vivo may be efficiently used in bioimaging, targeted drug delivery, diagnostic and analytic biological methods. Practically applicable examples comprise photoluminescence and optical biosensors, ingenious three-dimensional carbohydrate microarrays for high-throughput screening, matrices for magnetic resonance imaging, targeted hyperthermal treatment of cancer tissues, selective inhibitors of bacterial toxins and pathogen-recognising lectin receptors, and many others. This review aims to present an up-to-date systematic overview of glycan-decorated biomaterials promising for interactions with lectins, especially those applicable in biology, biotechnology or medicine. The lectins of interest include galectin-1, -3 and -7 participating in tumour progression, bacterial lectins from Pseudomonas aeruginosa (PA-IL), E. coli (Fim-H) and Clostridium botulinum (HA33) or DC-SIGN, receptors of macrophages and dendritic cells. The spectrum of lectin-binding biomaterials covered herein ranges from glycosylated organic structures, calixarene and fullerene cores over glycopeptides and glycoproteins, functionalised carbohydrate scaffolds of cyclodextrin or chitin to self-assembling glycopolymer clusters, gels, micelles and liposomes. Glyconanoparticles, glycan arrays, and other biomaterials with a solid core are described in detail, including inorganic matrices like hydroxyapatite or stainless steel for bioimplants.
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Affiliation(s)
- P Bojarová
- Laboratory of Biotransformation, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ 14220 Prague 4, Czech Republic.
| | - V Křen
- Laboratory of Biotransformation, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ 14220 Prague 4, Czech Republic.
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33
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Unravelling Immunoglobulin G Fc N-Glycosylation: A Dynamic Marker Potentiating Predictive, Preventive and Personalised Medicine. Int J Mol Sci 2018; 19:ijms19020390. [PMID: 29382131 PMCID: PMC5855612 DOI: 10.3390/ijms19020390] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 01/10/2018] [Accepted: 01/24/2018] [Indexed: 11/21/2022] Open
Abstract
Multiple factors influence immunoglobulin G glycosylation, which in turn affect the glycoproteins’ function on eliciting an anti-inflammatory or pro-inflammatory response. It is prudent to underscore these processes when considering the use of immunoglobulin G N-glycan moieties as an indication of disease presence, progress, or response to therapeutics. It has been demonstrated that the altered expression of genes that encode enzymes involved in the biosynthesis of immunoglobulin G N-glycans, receptors, or complement factors may significantly modify immunoglobulin G effector response, which is important for regulating the immune system. The immunoglobulin G N-glycome is highly heterogenous; however, it is considered an interphenotype of disease (a link between genetic predisposition and environmental exposure) and so has the potential to be used as a dynamic biomarker from the perspective of predictive, preventive, and personalised medicine. Undoubtedly, a deeper understanding of how the multiple factors interact with each other to alter immunoglobulin G glycosylation is crucial. Herein we review the current literature on immunoglobulin G glycoprotein structure, immunoglobulin G Fc glycosylation, associated receptors, and complement factors, the downstream effector functions, and the factors associated with the heterogeneity of immunoglobulin G glycosylation.
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34
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Klamer Z, Staal B, Prudden AR, Liu L, Smith DF, Boons GJ, Haab B. Mining High-Complexity Motifs in Glycans: A New Language To Uncover the Fine Specificities of Lectins and Glycosidases. Anal Chem 2017; 89:12342-12350. [PMID: 29058413 PMCID: PMC5700451 DOI: 10.1021/acs.analchem.7b04293] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
![]()
Knowledge of lectin
and glycosidase specificities is fundamental
to the study of glycobiology. The primary specificities of such molecules
can be uncovered using well-established tools, but the complex details
of their specificities are difficult to determine and describe. Here
we present a language and algorithm for the analysis and description
of glycan motifs with high complexity. The language uses human-readable
notation and wildcards, modifiers, and logical operators to define
motifs of nearly any complexity. By applying the syntax to the analysis
of glycan-array data, we found that the lectin AAL had higher binding
where fucose groups are displayed on separate branches. The lectin
SNA showed gradations in binding based on the length of the extension
displaying sialic acid and on characteristics of the opposing branches.
A new algorithm to evaluate changes in lectin binding upon treatment
with exoglycosidases identified the primary specificities and potential
fine specificities of an α1–2-fucosidase and an α2–3,6,8-neuraminidase.
The fucosidase had significantly lower action where sialic acid neighbors
the fucose, and the neuraminidase showed statistically lower action
where α1–2 fucose neighbors the sialic acid or is on
the opposing branch. The complex features identified here would have
been inaccessible to analysis using previous methods. The new language
and algorithms promise to facilitate the precise determination and
description of lectin and glycosidase specificities.
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Affiliation(s)
- Zachary Klamer
- Van Andel Research Institute , 333 Bostwick NE, Grand Rapids, Michigan 49503, United States
| | - Ben Staal
- Van Andel Research Institute , 333 Bostwick NE, Grand Rapids, Michigan 49503, United States
| | - Anthony R Prudden
- Complex Carbohydrate Research Center, University of Georgia , 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Lin Liu
- Complex Carbohydrate Research Center, University of Georgia , 315 Riverbend Road, Athens, Georgia 30602, United States
| | - David F Smith
- Emory Comprehensive Glycomics Core, Emory University School of Medicine , Atlanta, Georgia 30322, United States
| | - Geert-Jan Boons
- Complex Carbohydrate Research Center, University of Georgia , 315 Riverbend Road, Athens, Georgia 30602, United States
| | - Brian Haab
- Van Andel Research Institute , 333 Bostwick NE, Grand Rapids, Michigan 49503, United States
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35
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Scillitani G, Mentino D, Mastrodonato M. Glycopattern analysis of acidic secretion in the intestine of the red-eared slender turtle; Trachemys scripta elegans (Testudines: Emydidae). Tissue Cell 2017; 49:573-581. [PMID: 28756875 DOI: 10.1016/j.tice.2017.07.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 07/15/2017] [Accepted: 07/17/2017] [Indexed: 12/27/2022]
Abstract
The secretion of the goblet cells in the intestine of Trachemys scripta elegans was studied in situ by histochemical methods to analyze the diversity of sugar chains, with particular regard to the acidic glycans. Conventional histochemical stains (Periodic acid-Schiff, Alcian Blue pH 2.5, High Iron Diamine) and binding with ten FITC-labelled lectins combined with chemical and enzymatic pre-treatments were used to characterize the oligosaccharidic chains. The intestine can be divided into three regions, i.e. a duodenum, a small intestine and a large intestine. Goblet cells were observed in all the three tracts and presented an acidic secretion. WGA, LFA, PNA and SBA binding was observed only after desulfation. Glycans secreted by the three tracts consist mainly of sulfosialomucins with 1,2-linked fucose, mannosylated, glucosaminylated and subterminal galactosyl/galactosaminylated residuals. Differences among tracts are quantitative rather than qualitative, with sulfated, galactosaminylated and glycosaminylated residuals increasing from duodenum to large intestine, and galactosylated and fucosylated residuals showing an opposite trend. Variation is observed also between apices and bases of villi in both duodenum and small intestine, where sulphation decreases from the base to the apex and glycosylation shows an opposite trend. Functional implication of these findings is discussed in a comparative context.
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Affiliation(s)
- Giovanni Scillitani
- Department of Biology, Section of Animal and Environmental Biology, Laboratory of Histology and Comparative Anatomy, University of Bari Aldo Moro, via Orabona 4/a, I-0125 Bari, Italy.
| | - Donatella Mentino
- Department of Biology, Section of Animal and Environmental Biology, Laboratory of Histology and Comparative Anatomy, University of Bari Aldo Moro, via Orabona 4/a, I-0125 Bari, Italy
| | - Maria Mastrodonato
- Department of Biology, Section of Animal and Environmental Biology, Laboratory of Histology and Comparative Anatomy, University of Bari Aldo Moro, via Orabona 4/a, I-0125 Bari, Italy
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36
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Zhu F, Clemmer DE, Trinidad JC. Characterization of lectin binding affinities via direct LC-MS profiling: implications for glycopeptide enrichment and separation strategies. Analyst 2017; 142:65-74. [DOI: 10.1039/c6an02043g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Determining the affinity between a lectin and its target glycans is an important goal, both for understanding the biological functions of a given lectin as well as enabling the use of that lectin for targeted enrichment of glycosylated species from complex samples.
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Affiliation(s)
- Feifei Zhu
- Department of Chemistry
- Indiana University
- Bloomington
- USA
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37
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Expression and antigenicity of recombinant human respiratory syncytial virus glycoproteins having different affinity tags. Protein Expr Purif 2016; 132:1-8. [PMID: 28042093 DOI: 10.1016/j.pep.2016.12.003] [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: 02/06/2016] [Revised: 12/27/2016] [Accepted: 12/28/2016] [Indexed: 11/21/2022]
Abstract
Human respiratory syncytial virus (HRSV) is a main cause of lower respiratory tract infections in infants and the elderly. Glycoprotein (G) is major antigen on the viral surface, and plays a key role for virus entry. Therefore, purification of the glycoprotein of HRSV is critical for the development of HRSV vaccine and serological diagnosis. In this study, we report the design and characterization of glycoprotein engineered rationally to enhance the protein solubility and to facilitate efficient purification. We permuted HRSV glycoproteins with two tags: (i) an immunoglobulin (Ig) M signal peptide and a protein A B domain tag to render HRSV glycoprotein secret into the culture media and (ii) a foldon and 6 × histidine tag with or without transmembrane domain. Three recombinant baculoviruses were constructed: (i) transmembrane-truncated HRSV glycoprotein (amino acid positions 66-298) inserted with the N-terminal IgM signal peptide and protein A B domain (MG-GΔTM), (ii) truncated HRSV glycoprotein (amino acid positions 66-298) fused with a C-terminal foldon and 6 × histidine tag (GΔTM-FH), and (iii) full-length HRSV glycoprotein (amino acid positions 1-298) fused with a C-terminal foldon and 6 × histidine tag (G-FH). Highly soluble recombinant MG-GΔTM protein was clearly purified using one-step affinity chromatography with IgG-sepharose resin, whereas the recombinant G-FH protein and truncated GΔTM-FH were purified partially using nickel-resin. Although, the antigenicity of GΔTM-FH was stronger than highly mannose-rich MG-GΔTM protein, MG-GΔTM induced neutralizing antibodies efficiently in the mice to protect from infectious HRSV.
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Fucosylation is associated with the malignant transformation of intraductal papillary mucinous neoplasms: a lectin microarray-based study. Surg Today 2016; 46:1217-23. [PMID: 26754572 DOI: 10.1007/s00595-015-1299-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 11/26/2015] [Indexed: 02/08/2023]
Abstract
PURPOSE Intraductal papillary mucinous neoplasm (IPMN) is an intraductal mucin-producing pancreatic neoplasm with the potential for malignant transformation. Changes in glycans expressed on the cell surface and glycotransferases play important roles in malignant transformation. We conducted this study to analyze glycan alterations in IPMNs by using a lectin microarray and to identify the factors associated with altered glycans and their relationships with malignant transformation. METHODS Using a lectin microarray, we evaluated glycan expression in 22 samples of IPMN with carcinoma, obtained from curative resections performed in our department. We also used immunohistochemistry to investigate fucosyltransferase 8 (Fut 8) protein expression, which is associated with glycan alterations in IPMNs. RESULTS The lectin microarray demonstrated that only two lectins, Aleuria aurantia lectin (AAL) and Aspergillus oryzae L-fucose-specific lectin (AOL), which bind to fucose, exhibited significant sequential increases from normal pancreatic duct to adenoma and carcinoma. Similarly, Fut 8 protein expression, which is associated with AAL and AOL, sequentially and significantly increased from the normal pancreatic duct to adenoma and carcinoma. CONCLUSIONS Lectin microarray analysis suggested that fucosylation is associated with the malignant transformation of IPMNs.
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40
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Šunderić M, Šedivá A, Robajac D, Miljuš G, Gemeiner P, Nedić O, Katrlík J. Lectin-based protein microarray analysis of differences in serum alpha-2-macroglobulin glycosylation between patients with colorectal cancer and persons without cancer. Biotechnol Appl Biochem 2015; 63:457-64. [PMID: 26075587 DOI: 10.1002/bab.1407] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 06/10/2015] [Indexed: 11/11/2022]
Abstract
Glycosylation is co- and posttranslational modifications affecting proteins. The glycopattern changes are associated with changes in biological function and are involved in many diseases including cancer. We present the lectin-based protein microarray method enabling determination of differences in protein glycosylation. The method involves isolation of targeted protein from samples by immunoprecipitation, spotting of protein from multiple samples into arrays on a microarray slide, incubation with set of biotinylated lectins, the reaction with fluorescent conjugate of streptavidin, and detection of fluorescent intensities by microarray scanner. Lectin-based protein microarray was applied in investigation of differences in alpha-2-macroglobulin (α2M) glycosylation isolated from sera samples of healthy persons and patients with colorectal cancer (CC). From 14 lectins used in analysis, statistically significant differences (Student's t-test, P < 0.05) between two groups of samples (persons without cancer and CC patients) were found for 5 of them. α2M molecules isolated from sera of CC patients have higher content of α2,6 sialic acid, N-acetylglucosamine and mannose residues, and tri-/tetraantennary complex type high-mannose N-glycans. A novel lectin-based protein microarray developed and described can serve as a suitable analytical technique for sensitive, simple, fast, and high-throughput determination of differences in protein glycosylation isolated from serum or other samples.
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Affiliation(s)
- Miloš Šunderić
- Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia
| | - Alena Šedivá
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Dragana Robajac
- Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia
| | - Goran Miljuš
- Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia
| | - Peter Gemeiner
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Olgica Nedić
- Institute for the Application of Nuclear Energy, University of Belgrade, Belgrade, Serbia
| | - Jaroslav Katrlík
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovakia
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41
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Dan X, Liu W, Ng TB. Development and Applications of Lectins as Biological Tools in Biomedical Research. Med Res Rev 2015; 36:221-47. [PMID: 26290041 DOI: 10.1002/med.21363] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 07/15/2015] [Accepted: 07/16/2015] [Indexed: 01/08/2023]
Abstract
As a new and burgeoning area following genomics and proteomics, glycomics has become a hot issue due to its pivotal roles in many physiological and pathological processes. Glycans are much more complicated than genes or proteins since glycans are highly branched and dynamic. Antibodies and lectins are the two major molecular tools applied for glycan profiling. Though the study of antibodies and lectins started at almost the same time in 1880s, lectins gained much less attention than the antibodies until recent decades when the importance and difficulties of glycomics were realized. The present review summarizes the discovery history of lectins and their biological functions with a special emphasis on their various applications as biological tools. Both older techniques that had been developed in the last century and new technologies developed in recent years, especially lectin microarrays and lectin-based biosensors, are included in this account.
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Affiliation(s)
- Xiuli Dan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Wenlong Liu
- Department of Orthopaedics & Traumatology, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong
| | - Tzi Bun Ng
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
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42
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Angione MD, Duff T, Bell AP, Stamatin SN, Fay C, Diamond D, Scanlan EM, Colavita PE. Enhanced Antifouling Properties of Carbohydrate Coated Poly(ether sulfone) Membranes. ACS APPLIED MATERIALS & INTERFACES 2015; 7:17238-17246. [PMID: 26192984 DOI: 10.1021/acsami.5b04201] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Poly(ether sulfone) membranes (PES) were modified with biologically active monosaccharides and disaccharides using aryldiazonium chemistry as a mild, one-step, surface-modification strategy. We previously proposed the modification of carbon, metals, and alloys with monosaccharides using the same method; herein, we demonstrate modification of PES membranes and the effect of chemisorbed carbohydrate layers on their resistance to biofouling. Glycosylated PES surfaces were characterized using spectroscopic methods and tested against their ability to interact with specific carbohydrate-binding proteins. Galactose-, mannose-, and lactose-modified PES surfaces were exposed to Bovine Serum Albumin (BSA) solutions to assess unspecific protein adsorption in the laboratory and were found to adsorb significantly lower amounts of BSA compared to bare membranes. The ability of molecular carbohydrate layers to impart antifouling properties was further tested in the field via long-term immersive tests at a wastewater treatment plant. A combination of ATP content assays, infrared spectroscopic characterization and He-ion microscopy (HIM) imaging were used to investigate biomass accumulation at membranes. We show that, beyond laboratory applications and in the case of complex aqueous environments that are rich in biomass such as wastewater effluent, we observe significantly lower biofouling at carbohydrate-modified PES than at bare PES membrane surfaces.
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Affiliation(s)
- M Daniela Angione
- †School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland
- ‡Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Thomas Duff
- †School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland
- ‡Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Alan P Bell
- ‡Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Serban N Stamatin
- †School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland
- ‡Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Cormac Fay
- §Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
| | - Dermot Diamond
- §Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
| | - Eoin M Scanlan
- †School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland
- ‡Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Paula E Colavita
- †School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland
- ‡Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, College Green, Dublin 2, Ireland
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43
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Singh S, Pal K, Yadav J, Tang H, Partyka K, Kletter D, Hsueh P, Ensink E, Kc B, Hostetter G, Xu HE, Bern M, Smith DF, Mehta AS, Brand R, Melcher K, Haab BB. Upregulation of glycans containing 3' fucose in a subset of pancreatic cancers uncovered using fusion-tagged lectins. J Proteome Res 2015; 14:2594-605. [PMID: 25938165 DOI: 10.1021/acs.jproteome.5b00142] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The fucose post-translational modification is frequently increased in pancreatic cancer, thus forming the basis for promising biomarkers, but a subset of pancreatic cancer patients does not elevate the known fucose-containing biomarkers. We hypothesized that such patients elevate glycan motifs with fucose in linkages and contexts different from the known fucose-containing biomarkers. We used a database of glycan array data to identify the lectins CCL2 to detect glycan motifs with fucose in a 3' linkage; CGL2 for motifs with fucose in a 2' linkage; and RSL for fucose in all linkages. We used several practical methods to test the lectins and determine the optimal mode of detection, and we then tested whether the lectins detected glycans in pancreatic cancer patients who did not elevate the sialyl-Lewis A glycan, which is upregulated in ∼75% of pancreatic adenocarcinomas. Patients who did not upregulate sialyl-Lewis A, which contains fucose in a 4' linkage, tended to upregulate fucose in a 3' linkage, as detected by CCL2, but they did not upregulate total fucose or fucose in a 2' linkage. CCL2 binding was high in cancerous epithelia from pancreatic tumors, including areas negative for sialyl-Lewis A and a related motif containing 3' fucose, sialyl-Lewis X. Thus, glycans containing 3' fucose may complement sialyl-Lewis A to contribute to improved detection of pancreatic cancer. Furthermore, the use of panels of recombinant lectins may uncover details about glycosylation that could be important for characterizing and detecting cancer.
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Affiliation(s)
- Sudhir Singh
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Kuntal Pal
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Jessica Yadav
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Huiyuan Tang
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Katie Partyka
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Doron Kletter
- ‡Palo Alto Research Center, Palo Alto, California 94304, United States
| | - Peter Hsueh
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Elliot Ensink
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Birendra Kc
- §Spectrum Health, Grand Rapids, Michigan 49503, United States
| | - Galen Hostetter
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - H Eric Xu
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Marshall Bern
- ‡Palo Alto Research Center, Palo Alto, California 94304, United States
| | - David F Smith
- ∥Emory University, Atlanta, Georgia 30322, United States
| | - Anand S Mehta
- ⊥Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Randall Brand
- #University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania 15213, United States
| | - Karsten Melcher
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Brian B Haab
- †Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
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44
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Kletter D, Cao Z, Bern M, Haab B. Determining lectin specificity from glycan array data using motif segregation and GlycoSearch software. ACTA ACUST UNITED AC 2015; 5:157-69. [PMID: 23839995 DOI: 10.1002/9780470559277.ch130028] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The glycan array is a powerful tool for investigating the specificities of glycan-binding proteins. By incubating a glycan-binding protein on a glycan array, the relative binding to hundreds of different oligosaccharides can be quantified in parallel. Based on these data, much information can be obtained about the preference of a glycan-binding protein for specific subcomponents of oligosaccharides, or motifs. In many cases, the analysis and interpretation of glycan array data can be time consuming and imprecise if done manually. Recently, GlycoSearch software was developed to facilitate the analysis and interpretation of glycan array data based on two previously developed methods, Motif Segregation and Outlier Motif Analysis. Here, the principles behind this method and the use of this new tool for mining glycan array data are described. The automated, objective, and precise analysis of glycan array data should enhance the value of these data for a broad range of research applications.
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Affiliation(s)
- Doron Kletter
- Palo Alto Research Center, Palo Alto, California, USA
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45
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Tang H, Singh S, Partyka K, Kletter D, Hsueh P, Yadav J, Ensink E, Bern M, Hostetter G, Hartman D, Huang Y, Brand RE, Haab BB. Glycan motif profiling reveals plasma sialyl-lewis x elevations in pancreatic cancers that are negative for sialyl-lewis A. Mol Cell Proteomics 2015; 14:1323-33. [PMID: 25733690 DOI: 10.1074/mcp.m114.047837] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Indexed: 12/24/2022] Open
Abstract
The sialyl-Lewis A (sLeA) glycan forms the basis of the CA19-9 assay and is the current best biomarker for pancreatic cancer, but because it is not elevated in ∼25% of pancreatic cancers, it is not useful for early diagnosis. We hypothesized that sLeA-low tumors secrete glycans that are related to sLeA but not detectable by CA19-9 antibodies. We used a method called motif profiling to predict that a structural isomer of sLeA called sialyl-Lewis X (sLeX) is elevated in the plasma of some sLeA-low cancers. We corroborated this prediction in a set of 48 plasma samples and in a blinded set of 200 samples. An antibody sandwich assay formed by the capture and detection of sLeX was elevated in 13 of 69 cancers that were not elevated in sLeA, and a novel hybrid assay of sLeA capture and sLeX detected 24 of 69 sLeA-low cancers. A two-marker panel based on combined sLeA and sLeX detection differentiated 109 pancreatic cancers from 91 benign pancreatic diseases with 79% accuracy (74% sensitivity and 78% specificity), significantly better than sLeA alone, which yielded 68% accuracy (65% sensitivity and 71% specificity). Furthermore, sLeX staining was evident in tumors that do not elevate plasma sLeA, including those with poorly differentiated ductal adenocarcinoma. Thus, glycan-based biomarkers could characterize distinct subgroups of patients. In addition, the combined use of sLeA and sLeX, or related glycans, could lead to a biomarker panel that is useful in the clinical diagnosis of pancreatic cancer. Précis: This paper shows that a structural isomer of the current best biomarker for pancreatic cancer, CA19-9, is elevated in the plasma of patients who are low in CA19-9, potentially enabling more comprehensive detection and classification of pancreatic cancers.
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Affiliation(s)
| | | | | | | | - Peter Hsueh
- §Van Andel Research Institute, Grand Rapids, MI
| | | | | | | | | | | | - Ying Huang
- **University of Pittsburgh School of Medicine, Pittsburgh, PA
| | | | - Brian B Haab
- §Van Andel Research Institute, Grand Rapids, MI;
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46
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Li J, Tao S, Orlando R, Murtaugh MP. N-glycosylation profiling of porcine reproductive and respiratory syndrome virus envelope glycoprotein 5. Virology 2015; 478:86-98. [PMID: 25726973 DOI: 10.1016/j.virol.2015.02.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Revised: 02/05/2015] [Accepted: 02/09/2015] [Indexed: 02/04/2023]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is a positive-sense ssRNA virus whose envelope contains four glycoproteins and three nonglycosylated proteins. Glycans of major envelope glycoprotein 5 (GP5) are proposed as important for virus assembly and entry into permissive cells. Structural characterization of GP5 glycans would facilitate the mechanistic understanding of these processes. Thus, we purified the PRRSV type 2 prototype strain, VR2332, and analyzed the virion-associated glycans by both biochemical and mass spectrometric methods. Endoglycosidase digestion showed that GP5 was the primary protein substrate, and that the carbohydrate moieties were primarily complex-type N-glycans. Mass spectrometric analysis (HPLC-ESI-MS/MS) of GP5 N-glycans revealed an abundance of N-acetylglucosamine (GlcNAc) and N-acetyllactosamine (LacNAc) oligomers in addition to sialic acids. GlcNAc and LacNAc accessibility to ligands was confirmed by lectin co-precipitation. Our findings help to explain PRRSV infection of cells lacking sialoadhesin and provide a glycan database to facilitate molecular structural studies of PRRSV.
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Affiliation(s)
- Juan Li
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 1971 Commonwealth Ave., St. Paul, MN 51108, USA
| | - Shujuan Tao
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Rd., Athens, GA 30602, USA
| | - Ron Orlando
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Rd., Athens, GA 30602, USA
| | - Michael P Murtaugh
- Department of Veterinary and Biomedical Sciences, University of Minnesota, 1971 Commonwealth Ave., St. Paul, MN 51108, USA.
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47
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Tang H, Hsueh P, Kletter D, Bern M, Haab B. The detection and discovery of glycan motifs in biological samples using lectins and antibodies: new methods and opportunities. Adv Cancer Res 2015; 126:167-202. [PMID: 25727148 DOI: 10.1016/bs.acr.2014.11.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Recent research has uncovered unexpected ways that glycans contribute to biology, as well as new strategies for combatting disease using approaches involving glycans. To make full use of glycans for clinical applications, we need more detailed information on the location, nature, and dynamics of glycan expression in vivo. Such studies require the use of specimens acquired directly from patients. Effective studies of clinical specimens require low-volume assays, high precision measurements, and the ability to process many samples. Assays using affinity reagents-lectins and glycan-binding antibodies-can meet these requirements, but further developments are needed to make the methods routine and effective. Recent advances in the use of glycan-binding proteins involve improved determination of specificity using glycan arrays; the availability of databases for mining and analyzing glycan array data; lectin engineering methods; and the ability to quantitatively interpret lectin measurements. Here, we describe many of the challenges and opportunities involved in the application of these new approaches to the study of biological samples. The new tools hold promise for developing methods to improve the outcomes of patients afflicted with diseases characterized by aberrant glycan expression.
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Affiliation(s)
- Huiyuan Tang
- Van Andel Research Institute, Grand Rapids, MI, USA
| | - Peter Hsueh
- Van Andel Research Institute, Grand Rapids, MI, USA
| | | | | | - Brian Haab
- Van Andel Research Institute, Grand Rapids, MI, USA.
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48
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Kletter D, Curnutte B, Maupin K, Bern M, Haab BB. Exploring the specificities of glycan-binding proteins using glycan array data and the GlycoSearch software. Methods Mol Biol 2015; 1273:203-14. [PMID: 25753713 PMCID: PMC4511485 DOI: 10.1007/978-1-4939-2343-4_15] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The glycan array is a powerful tool for investigating the specificities of glycan-binding proteins. By incubating a glycan-binding protein on a glycan array, the relative binding to hundreds of different oligosaccharides can be quantified in parallel. Based on these data, much information can be obtained about the preference of a glycan-binding protein for specific subcomponents of oligosaccharides or motifs. In many cases, the analysis and interpretation of glycan array data can be time consuming and imprecise if done manually. Recently we developed software, called GlycoSearch, to facilitate the analysis and interpretation of glycan array data based on the previously developed methods called Motif Segregation and Outlier Motif Analysis. Here we describe the principles behind the software, the use of the software, and an example application. The automated, objective, and precise analysis of glycan array data should enhance the value of the data for a broad range of research applications.
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Affiliation(s)
| | | | | | | | - Brian B. Haab
- Van Andel Research Institute,Corresponding author: Brian B. Haab, Ph.D., Van Andel Research Institute, 333 Bostwick NE, Grand Rapids, MI 49503, (616) 234-5269,
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49
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West MB, Partyka K, Feasley CL, Maupin KA, Goppallawa I, West CM, Haab BB, Hanigan MH. Detection of distinct glycosylation patterns on human γ-glutamyl transpeptidase 1 using antibody-lectin sandwich array (ALSA) technology. BMC Biotechnol 2014; 14:101. [PMID: 25479762 PMCID: PMC4297448 DOI: 10.1186/s12896-014-0101-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 11/19/2014] [Indexed: 01/12/2023] Open
Abstract
Background γ-Glutamyl transpeptidase 1 (GGT1) is an N-glycosylated membrane protein that catabolizes extracellular glutathione and other γ-glutamyl-containing substrates. In a variety of disease states, including tumor formation, the enzyme is shed from the surface of the cell and can be detected in serum. The structures of the N-glycans on human GGT1 (hGGT1) have been shown to be tissue-specific. Tumor-specific changes in the glycans have also been observed, suggesting that the N-glycans on hGGT1 would be an important biomarker for detecting tumors and monitoring their progression during treatment. However, the large quantities of purified protein required to fully characterize the carbohydrate content poses a significant challenge for biomarker development. Herein, we investigated a new antibody-lectin sandwich array (ALSA) platform to determine whether this microanalytical technique could be applied to the characterization of N-glycan content of hGGT1 in complex biological samples. Results Our data show that hGGT1 can be isolated from detergent extracted membrane proteins by binding to the ALSA platform. Probing hGGT1 with lectins enables characterization of the N-glycans. We probed hGGT1 from normal human liver tissue, normal human kidney tissue, and hGGT1 expressed in the yeast Pichia pastoris. The lectin binding patterns obtained with the ALSA platform are consistent with the hGGT1 N-glycan composition obtained from previous large-scale hGGT1 N-glycan characterizations from these sources. We also validate the implementation of the Microcystis aeruginosa lectin, microvirin, in this platform and provide refined evidence for its efficacy in specifically recognizing high-mannose-type N-glycans, a class of carbohydrate modification that is distinctive of hGGT1 expressed by many tumors. Conclusion Using this microanalytical approach, we provide proof-of-concept for the implementation of ALSA in conducting high-throughput studies aimed at investigating disease-related changes in the glycosylation patterns on hGGT1 with the goal of enhancing clinical diagnoses and targeted treatment regimens. Electronic supplementary material The online version of this article (doi:10.1186/s12896-014-0101-0) contains supplementary material, which is available to authorized users.
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Biological and protective properties of immune sera directed to the influenza virus neuraminidase. J Virol 2014; 89:1550-63. [PMID: 25392225 DOI: 10.1128/jvi.02949-14] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED The envelope of influenza A viruses contains two large antigens, hemagglutinin (HA) and neuraminidase (NA). Conventional influenza virus vaccines induce neutralizing antibodies that are predominantly directed to the HA globular head, a domain that is subject to extensive antigenic drift. Antibodies directed to NA are induced at much lower levels, probably as a consequence of the immunodominance of the HA antigen. Although antibodies to NA may affect virus release by inhibiting the sialidase function of the glycoprotein, the antigen has been largely neglected in past vaccine design. In this study, we characterized the protective properties of monospecific immune sera that were generated by vaccination with recombinant RNA replicon particles encoding NA. These immune sera inhibited hemagglutination in an NA subtype-specific and HA subtype-independent manner and interfered with infection of MDCK cells. In addition, they inhibited the sialidase activities of various influenza viruses of the same and even different NA subtypes. With this, the anti-NA immune sera inhibited the spread of H5N1 highly pathogenic avian influenza virus and HA/NA-pseudotyped viruses in MDCK cells in a concentration-dependent manner. When chickens were immunized with NA recombinant replicon particles and subsequently infected with low-pathogenic avian influenza virus, inflammatory serum markers were significantly reduced and virus shedding was limited or eliminated. These findings suggest that NA antibodies can inhibit virus dissemination by interfering with both virus attachment and egress. Our results underline the potential of high-quality NA antibodies for controlling influenza virus replication and place emphasis on NA as a vaccine antigen. IMPORTANCE The neuraminidase of influenza A viruses is a sialidase that acts as a receptor-destroying enzyme facilitating the release of progeny virus from infected cells. Here, we demonstrate that monospecific anti-NA immune sera inhibited not only sialidase activity, but also influenza virus hemagglutination and infection of MDCK cells, suggesting that NA antibodies can interfere with virus attachment. Inhibition of both processes, virus release and virus binding, may explain why NA antibodies efficiently blocked virus dissemination in vitro and in vivo. Anti-NA immune sera showed broader reactivity than anti-HA sera in hemagglutination inhibition tests and demonstrated cross-subtype activity in sialidase inhibition tests. These remarkable features of NA antibodies highlight the importance of the NA antigen for the development of next-generation influenza virus vaccines.
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