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Liu HZ, Song XQ, Zhang H. Sugar-coated bullets: Unveiling the enigmatic mystery 'sweet arsenal' in osteoarthritis. Heliyon 2024; 10:e27624. [PMID: 38496870 PMCID: PMC10944269 DOI: 10.1016/j.heliyon.2024.e27624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/19/2024] Open
Abstract
Glycosylation is a crucial post-translational modification process where sugar molecules (glycans) are covalently linked to proteins, lipids, or other biomolecules. In this highly regulated and complex process, a series of enzymes are involved in adding, modifying, or removing sugar residues. This process plays a pivotal role in various biological functions, influencing the structure, stability, and functionality of the modified molecules. Glycosylation is essential in numerous biological processes, including cell adhesion, signal transduction, immune response, and biomolecular recognition. Dysregulation of glycosylation is associated with various diseases. Glycation, a post-translational modification characterized by the non-enzymatic attachment of sugar molecules to proteins, has also emerged as a crucial factor in various diseases. This review comprehensively explores the multifaceted role of glycation in disease pathogenesis, with a specific focus on its implications in osteoarthritis (OA). Glycosylation and glycation alterations wield a profound influence on OA pathogenesis, intertwining with disease onset and progression. Diverse studies underscore the multifaceted role of aberrant glycosylation in OA, particularly emphasizing its intricate relationship with joint tissue degradation and inflammatory cascades. Distinct glycosylation patterns, including N-glycans and O-glycans, showcase correlations with inflammatory cytokines, matrix metalloproteinases, and cellular senescence pathways, amplifying the degenerative processes within cartilage. Furthermore, the impact of advanced glycation end-products (AGEs) formation in OA pathophysiology unveils critical insights into glycosylation-driven chondrocyte behavior and extracellular matrix remodeling. These findings illuminate potential therapeutic targets and diagnostic markers, signaling a promising avenue for targeted interventions in OA management. In this comprehensive review, we aim to thoroughly examine the significant impact of glycosylation or AGEs in OA and explore its varied effects on other related conditions, such as liver-related diseases, immune system disorders, and cancers, among others. By emphasizing glycosylation's role beyond OA and its implications in other diseases, we uncover insights that extend beyond the immediate focus on OA, potentially revealing novel perspectives for diagnosing and treating OA.
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Affiliation(s)
- Hong-zhi Liu
- Department of Orthopaedics, Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xin-qiu Song
- The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Hongmei Zhang
- Department of Orthopaedics, Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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2
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Huang S, Thomsson KA, Jin C, Ryberg H, Das N, Struglics A, Rolfson O, Björkman LI, Eisler T, Schmidt TA, Jay GD, Krawetz R, Karlsson NG. Truncated lubricin glycans in osteoarthritis stimulate the synoviocyte secretion of VEGFA, IL-8, and MIP-1α: Interplay between O-linked glycosylation and inflammatory cytokines. Front Mol Biosci 2022; 9:942406. [PMID: 36213120 PMCID: PMC9532613 DOI: 10.3389/fmolb.2022.942406] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 08/26/2022] [Indexed: 11/18/2022] Open
Abstract
The primary aim of the study was to identify inflammatory markers relevant for osteoarthritis (OA)-related systemic (plasma) and local (synovial fluid, SF) inflammation. From this, we looked for inflammatory markers that coincided with the increased amount of O-linked Tn antigen (GalNAcα1-Ser/Thr) glycan on SF lubricin. Inflammatory markers in plasma and SF in OA patients and controls were measured using a 44-multiplex immunoassay. We found consistently 29 markers detected in both plasma and SF. The difference in their concentration and the low correlation when comparing SF and plasma suggests an independent inflammatory environment in the two biofluids. Only plasma MCP-4 and TARC increased in our patient cohort compared to control plasma. To address the second task, we concluded that plasma markers were irrelevant for a direct connection with SF glycosylation. Hence, we correlated the SF-inflammatory marker concentrations with the level of altered glycosylation of SF-lubricin. We found that the level of SF-IL-8 and SF-MIP-1α and SF-VEGFA in OA patients displayed a positive correlation with the altered lubricin glycosylation. Furthermore, when exposing fibroblast-like synoviocytes from both controls and OA patients to glycovariants of recombinant lubricin, the secretion of IL-8 and MIP-1α and VEGFA were elevated using lubricin with Tn antigens, while lubricin with sialylated and nonsialylated T antigens had less or no measurable effect. These data suggest that truncated glycans of lubricin, as found in OA, promote synovial proinflammatory cytokine production and exacerbate local synovial inflammation.
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Affiliation(s)
- Shan Huang
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Kristina A. Thomsson
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Chunsheng Jin
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Henrik Ryberg
- Clinical Chemistry, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Nabangshu Das
- Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - André Struglics
- Department of Clinical Sciences Lund, Orthopaedics, Faculty of Medicine, Lund University, Lund, Sweden
| | - Ola Rolfson
- Department of Orthopaedics, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Lena I. Björkman
- Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Thomas Eisler
- Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Tannin A. Schmidt
- Biomedical Engineering Department, University of Connecticut Health Centre, Farmington, CT, United States
| | - Gregory D. Jay
- Department of Emergency Medicine, Warren Alpert Medical School and Division of Biomedical Engineering, School of Engineering, Brown University, Providence, RI, United States
| | - Roman Krawetz
- Cell Biology and Anatomy, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Niclas G. Karlsson
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Pharmacy, Department of Life Sciences and Health, Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway
- *Correspondence: Niclas G. Karlsson,
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Lu X, Wu J, Qin Y, Liang J, Qian H, Song J, Qu C, Liu R. Identification of N-glycoproteins of hip cartilage in patients with osteonecrosis of femoral head using quantitative glycoproteomics. Int J Biol Macromol 2021; 187:892-902. [PMID: 34331982 DOI: 10.1016/j.ijbiomac.2021.07.159] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 07/04/2021] [Accepted: 07/23/2021] [Indexed: 10/20/2022]
Abstract
N-glycosylation is a major post-translational modification of proteins and involved in many diseases, however, the state and role of N-glycosylation in cartilage degeneration of osteonecrosis of femoral head (ONFH) remain unclear. The aim of this study is to identify the glycoproteins of ONFH hip cartilage. Cartilage tissues were collected from nine patients with ONFH and nine individuals with traumatic femoral neck fracture. Cartilage glycoproteins were identified by glycoproteomics based on LC-MS/MS. The differentially N-glycoproteins including glycosites were identified in ONFH and controls. A total of 408 N-glycoproteins with 444 N-glycosites were identified in ONFH and control cartilage. Among them, 104 N-glycoproteins with 130 N-glycosites were significantly differential in ONFH and control cartilage, which including matrix-remodeling-associated protein 5, prolow-density lipoprotein receptor-related protein 1, clusterin and lysosome-associated membrane glycoprotein 2. Gene Ontology analysis revealed the significantly differential glycoproteins mainly belonged to protein metabolic process, single-multicellular organism process, proteolysis, biological adhesion and cell adhesion. KEGG pathway and protein-protein interaction analysis suggested that the significantly differential glycoproteins were associated with PI3K-Akt signalling pathway, ECM-receptor interaction, protein processing in the endoplasmic reticulum and N-glycan biosynthesis. This information provides substantial insight into the role of protein glycosylation in the development of cartilage degeneration of ONFH patients.
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Affiliation(s)
- Xueliang Lu
- Department of Orthopedics, the Second Affiliated Hospital, Xi'an Jiaotong University, No. 157 Xiwu Road, Xi'an 710004, China; Department of Orthopedics, the First Affiliated Hospital of Henan University of Science and Technology, Luoyang, Henan Province 471003, China
| | - Junlong Wu
- Department of Orthopedics, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan Province 471009, China
| | - Yannan Qin
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - Jialin Liang
- Department of Orthopedics, the Second Affiliated Hospital, Xi'an Jiaotong University, No. 157 Xiwu Road, Xi'an 710004, China
| | - Hang Qian
- Department of Orthopedics, the Second Affiliated Hospital, Xi'an Jiaotong University, No. 157 Xiwu Road, Xi'an 710004, China
| | - Jidong Song
- Department of Orthopedics, the Second Affiliated Hospital, Xi'an Jiaotong University, No. 157 Xiwu Road, Xi'an 710004, China
| | - Chengjuan Qu
- Department of Odontology, Umeå University, Umeå 90185, Sweden
| | - Ruiyu Liu
- Department of Orthopedics, the Second Affiliated Hospital, Xi'an Jiaotong University, No. 157 Xiwu Road, Xi'an 710004, China.
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Brockhausen I, Melamed J. Mucins as anti-cancer targets: perspectives of the glycobiologist. Glycoconj J 2021; 38:459-474. [PMID: 33704667 DOI: 10.1007/s10719-021-09986-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/22/2021] [Accepted: 02/26/2021] [Indexed: 12/11/2022]
Abstract
Mucins are highly O-glycosylated glycoproteins that carry a heterogenous variety of O-glycan structures. Tumor cells tend to overexpress specific mucins, such as the cell surface mucins MUC1 and MUC4 that are engaged in signaling and cell growth, and exhibit abnormal glycosylation. In particular, the Tn and T antigens and their sialylated forms are common in cancer mucins. We review herein methods chosen to use cancer-associated glycans and mucins as targets for the design of anti-cancer immunotherapies. Mucin peptides from the glycosylated and transmembrane domains have been combined with immune-stimulating adjuvants in a wide variety of approaches to produce anti-tumor antibodies and vaccines. These mucin conjugates have been tested on cancer cells in vitro and in mice with significant successes in stimulating anti-tumor responses. The clinical trials in humans, however, have shown limited success in extending survival. It seems critical that the individual-specific epitope expression of cancer mucins is considered in future therapies to result in lasting anti-tumor responses.
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Affiliation(s)
- Inka Brockhausen
- Biomedical and Molecular Sciences, Queen's University, 18 Stuart St, Kingston, ON, K7L 3N6, Canada.
| | - Jacob Melamed
- Biomedical and Molecular Sciences, Queen's University, 18 Stuart St, Kingston, ON, K7L 3N6, Canada
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Pountos I, Walters G, Panteli M, Einhorn TA, Giannoudis PV. Inflammatory Profile and Osteogenic Potential of Fracture Haematoma in Humans. J Clin Med 2019; 9:jcm9010047. [PMID: 31878248 PMCID: PMC7019316 DOI: 10.3390/jcm9010047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 12/15/2022] Open
Abstract
Fracture haematoma forms immediately after fracture and is considered essential for the bone healing process. Its molecular composition has been briefly investigated with our current understanding being based on animal studies. This study aims to analyse the inflammatory cytokine content of fracture haematoma in humans and determine its effect on osteoprogenitor cells. Twenty-three patients were recruited following informed consent. Peripheral blood, fracture haematoma and bone were collected. A Luminex assay on the levels of 34 cytokines was performed and autologous peripheral blood samples served as control. Mesenchymal Stem Cells (MSCs) were isolated following collagenase digestion and functional assays were performed. Gene expression analysis of 84 key osteogenic molecules was performed. Thirty-three inflammatory cytokines were found to be significantly raised in fracture haematoma when compared to peripheral serum (p < 0.05). Amongst the most raised molecules were IL-8, IL-11 and MMP1, -2 and -3. Fracture haematoma did not significantly affect MSC proliferation, but ALP activity and calcium deposition were significantly increased in the MSCs undergoing osteogenic differentiation. Medium supplementations with fracture haematoma resulted in a statistically significant upregulation of osteogenic genes including the EGF, FGF2 and VEGFA. This seems to be the pathway involved in the osteogenic effect of fracture haematoma on bone cells. In conclusion, fracture haematoma is found to be a medium rich in inflammatory and immunomodulatory mediators. At the same time, it contains high levels of anti-inflammatory molecules, regulates osteoclastogenesis, induces angiogenesis and the production of the extracellular matrix. It appears that fracture haematoma does not affect osteoprogenitor cells proliferation as previously thought, but induces an osteogenic phenotype.
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Affiliation(s)
- Ippokratis Pountos
- Academic Department of Trauma & Orthopaedics, School of Medicine, University of Leeds, Leeds LS 2 9JT, UK; (G.W.); (M.P.); (P.V.G.)
- Correspondence: ; Tel.: +44-113-3922750
| | - Gavin Walters
- Academic Department of Trauma & Orthopaedics, School of Medicine, University of Leeds, Leeds LS 2 9JT, UK; (G.W.); (M.P.); (P.V.G.)
| | - Michalis Panteli
- Academic Department of Trauma & Orthopaedics, School of Medicine, University of Leeds, Leeds LS 2 9JT, UK; (G.W.); (M.P.); (P.V.G.)
| | - Thomas A. Einhorn
- Department of Orthopaedic Surgery, NYU Langone Health, New York, NY 10016, USA;
| | - Peter V. Giannoudis
- Academic Department of Trauma & Orthopaedics, School of Medicine, University of Leeds, Leeds LS 2 9JT, UK; (G.W.); (M.P.); (P.V.G.)
- NIHR Leeds Biomedical Research Center, Chapel Allerton Hospital, LS7 4SA Leeds, West Yorkshire, Leeds LS7 4SA, UK
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6
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Woodward AM, Lehoux S, Mantelli F, Di Zazzo A, Brockhausen I, Bonini S, Argüeso P. Inflammatory Stress Causes N-Glycan Processing Deficiency in Ocular Autoimmune Disease. THE AMERICAN JOURNAL OF PATHOLOGY 2018; 189:283-294. [PMID: 30448401 DOI: 10.1016/j.ajpath.2018.10.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/10/2018] [Accepted: 10/16/2018] [Indexed: 12/19/2022]
Abstract
High levels of proinflammatory cytokines have been associated with a loss of tissue function in ocular autoimmune diseases, but the basis for this relationship remains poorly understood. Here we investigate a new role for tumor necrosis factor α in promoting N-glycan-processing deficiency at the surface of the eye through inhibition of N-acetylglucosaminyltransferase expression in the Golgi. Using mass spectrometry, complex-type biantennary oligosaccharides were identified as major N-glycan structures in differentiated human corneal epithelial cells. Remarkably, significant differences were detected between the efficacies of cytokines in regulating the expression of glycogenes involved in the biosynthesis of N-glycans. Tumor necrosis factor α but not IL-1β had a profound effect in suppressing the expression of enzymes involved in the Golgi branching pathway, including N-acetylglucosaminyltransferases 1 and 2, which are required for the formation of biantennary structures. This decrease in gene expression was correlated with a reduction in enzymatic activity and impaired N-glycan branching. Moreover, patients with ocular mucous membrane pemphigoid were characterized by marginal N-acetylglucosaminyltransferase expression and decreased N-glycan branching in the conjunctiva. Together, these data indicate that proinflammatory cytokines differentially influence the expression of N-glycan-processing enzymes in the Golgi and set the stage for future studies to explore the pathophysiology of ocular autoimmune diseases.
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Affiliation(s)
- Ashley M Woodward
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts
| | - Sylvain Lehoux
- Beth Israel Deaconess Medical Center, Department of Surgery, Harvard Medical School, Boston, Massachusetts
| | | | - Antonio Di Zazzo
- Ophthalmology Complex Unit, Campus Bio-Medico University of Rome, Rome, Italy
| | - Inka Brockhausen
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Stefano Bonini
- Ophthalmology Complex Unit, Campus Bio-Medico University of Rome, Rome, Italy
| | - Pablo Argüeso
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts.
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Brockhausen I, Elimova E, Woodward AM, Argüeso P. Glycosylation pathways of human corneal and conjunctival epithelial cell mucins. Carbohydr Res 2018; 470:50-56. [PMID: 30392563 DOI: 10.1016/j.carres.2018.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/15/2018] [Accepted: 10/18/2018] [Indexed: 12/20/2022]
Abstract
Mucin glycoproteins on the ocular surface are rich in O-glycans and have important roles in the protection from physical, chemical and microbial impact. In this work, we have cultured human corneal and conjunctival epithelial cells to examine the glycosyltransferase activities that synthesize the O-glycans of mucins. The results indicate that ocular surface epithelial cells have active enzymes that synthesize O-glycans with sialylated core 1, Galβ1-3GalNAcα, and core 2, GlcNAcβ1-6(Galβ1-3)GalNAcα structures which corresponds to previous structural studies. Eye cells also have enzymes that synthesize complex N-glycans that are found on mucins. Results from treatment of eye cells with TNFα suggest that epithelial O-glycosylation changes in a dynamic fashion during inflammatory stimuli of the eye surface.
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Affiliation(s)
- Inka Brockhausen
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada.
| | - Elena Elimova
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Ashley M Woodward
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, United States
| | - Pablo Argüeso
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, United States
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Abstract
Osteoarthritis is characterized by a chronic, progressive and irreversible degradation of the articular cartilage associated with joint inflammation and a reparative bone response. More than 100 million people are affected by this condition worldwide with significant health and welfare costs. Our available treatment options in osteoarthritis are extremely limited. Chondral or osteochondral grafts have shown some promising results but joint replacement surgery is by far the most common therapeutic approach. The difficulty lies on the limited regeneration capacity of the articular cartilage, poor blood supply and the paucity of resident progenitor stem cells. In addition, our poor understanding of the molecular signalling pathways involved in the senescence and apoptosis of chondrocytes is a major factor restricting further progress in the area. This review focuses on molecules and approaches that can be implemented to delay or even rescue chondrocyte apoptosis. Ways of modulating the physiologic response to trauma preventing chondrocyte death are proposed. The use of several cytokines, growth factors and advances made in altering several of the degenerative genetic pathways involved in chondrocyte apoptosis and degradation are also presented. The suggested approaches can help clinicians to improve cartilage tissue regeneration.
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Affiliation(s)
- Ippokratis Pountos
- Academic Department of Trauma & Orthopaedics, School of Medicine, University of Leeds, UK.
| | - Peter V Giannoudis
- Academic Department of Trauma & Orthopaedics, School of Medicine, University of Leeds, UK; NIHR Leeds Biomedical Research Center, Chapel Allerton Hospital, Leeds, UK.
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Kazezian Z, Sakai D, Pandit A. Hyaluronic Acid Microgels Modulate Inflammation and Key Matrix Molecules toward a Regenerative Signature in the Injured Annulus Fibrosus. ACTA ACUST UNITED AC 2017; 1:e1700077. [PMID: 32646195 DOI: 10.1002/adbi.201700077] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/30/2017] [Indexed: 01/08/2023]
Abstract
Low back pain results from disc degeneration, which is a chronic inflammatory disease characterized by an imbalance between anabolic and catabolic factors. Today, regenerative medicine is focused on identifying inflammatory markers to target disc disease. Hyaluronan is used as a scaffold for cell delivery in disc degeneration; however, to date high molecular weight hyaluronan (HMW HA) is evaluated for its anti-inflammatory and matrix modulatory properties in an in vivo disc injury model. Ex vivo bovine organ culture studies demonstrate the anti-inflammatory and matrix modulatory effects of HMW HA on the IFNα2β signaling pathway that provides the motivation for evaluating its efficacy in regenerating the annulus fibrosus in an in vivo disc injury model. It is demonstrated that the HMW HA microgel acts as an anti-inflammatory molecule in the annulus fibrosus, by downregulating the expression of the pro-inflammatory interferon gamma (IFNα) and pro-apoptotic insulin-like growth factor-binding protein 3 (IGFBP3) and the apoptosis marker caspase 3. Mass spectrometry studies demonstrate that the HMW HA microgel modulates the matrix modulatory effect by upregulating hyaluronic acid link protein (HAPLN1) and aggrecan, which are further confirmed by immunostaining. The microgel's regenerative capacity is illustrated by the increase in the disc height index.
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Affiliation(s)
- Zepur Kazezian
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
| | - Daisuke Sakai
- Department of Orthopaedic Surgery, Tokai University School of Medicine, Shibuya, Tokyo, 151-0063, Japan
| | - Abhay Pandit
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
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Brockhausen I, Anastassiades TP. Inflammation and arthritis: perspectives of the glycobiologist. Expert Rev Clin Immunol 2014; 4:173-91. [DOI: 10.1586/1744666x.4.2.173] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Pabst M, Wu SQ, Grass J, Kolb A, Chiari C, Viernstein H, Unger FM, Altmann F, Toegel S. IL-1beta and TNF-alpha alter the glycophenotype of primary human chondrocytes in vitro. Carbohydr Res 2010; 345:1389-93. [PMID: 20303074 DOI: 10.1016/j.carres.2010.02.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 02/18/2010] [Accepted: 02/20/2010] [Indexed: 10/19/2022]
Abstract
Despite the significance of glycoproteins for extracellular matrix assembly in cartilage tissue, little is known about the regulation of the chondrocyte glycophenotype under inflammatory conditions. The present study aimed to assess the effect of IL-1beta and TNF-alpha on specific features of the glycophenotype of primary human chondrocytes in vitro. Using LC-MS, we found that both cytokines increased overall sialylation of N- and O-glycans and induced a shift towards alpha-(2-->3)-linked sialic acid residues in chondrocyte glycoproteins. These results were supported by quantitative PCR showing increased expression of alpha-(2-->3) sialyltransferases in treated cells. Moreover, we found that both IL-1beta and TNF-alpha induced a considerable shift from oligomannosidic glycans towards complex-type N-glycans. In contrast, core alpha-(1-->6)-fucosylation of chondrocyte N-glycans was found to be reduced particularly by TNF-alpha. In summary, inflammatory conditions induce specific alterations of the chondrocyte glycophenotype which might affect cell-matrix interactions or the function of endogenous lectins.
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Affiliation(s)
- Martin Pabst
- Department of Chemistry, University of Natural Resources and Applied Life Sciences, Vienna, Austria
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12
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Toegel S, Pabst M, Wu SQ, Grass J, Goldring MB, Chiari C, Kolb A, Altmann F, Viernstein H, Unger FM. Phenotype-related differential alpha-2,6- or alpha-2,3-sialylation of glycoprotein N-glycans in human chondrocytes. Osteoarthritis Cartilage 2010; 18:240-8. [PMID: 19800998 PMCID: PMC2818349 DOI: 10.1016/j.joca.2009.09.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2009] [Revised: 08/18/2009] [Accepted: 09/09/2009] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Sialic acids frequently occur at the terminal positions of glycoprotein N-glycans present at chondrocyte surfaces or in the cartilage matrix. Sialic acids are transferred to glycoproteins in either alpha-2,3 or alpha-2,6 linkage by specific sialyltransferases (SiaTs) and can potentially affect cell functions and cell-matrix interactions. The present study aimed to assess the relationship between the expression of the human chondrocyte phenotype and the sialylation of chondrocyte glycoprotein N-glycans. METHODS The transcription of 5 SiaT was quantified using real-time Reverse transcription polymerase chain reaction (RT-PCR) assays. N-glycan analysis was performed using LC-ESI-MS. Primary human chondrocytes were cultured in monolayer or alginate beads and compared to the chondrocyte cell lines C-28/I2 and SW1353. In addition, effects of interleukin-1beta (IL-1beta) or tumour necrosis factor-alpha (TNF-alpha) on primary cells were assessed. RESULTS Primary human chondrocytes predominantly express alpha-2,6-specific SiaTs and accordingly, alpha-2,6-linked sialic acid residues in glycoprotein N-glycans. In contrast, the preponderance of alpha-2,3-linked sialyl residues and, correspondingly, reduced levels of alpha-2,6-specific SiaTs are associated with the altered chondrocyte phenotype of C-28/I2 and SW1353 cells. Importantly, a considerable shift towards alpha-2,3-linked sialic acids and alpha-2,3-specific SiaT mRNA levels occurred in primary chondrocytes treated with IL-1beta or tumour necrosis factor-alpha (TNF-alpha). CONCLUSION The expression of the differentiated chondrocyte phenotype is linked to the ratio of alpha-2,6- to alpha-2,3-linked sialic acids in chondrocyte glycoprotein N-glycans. A shift towards altered sialylation might contribute to impaired cell-matrix interactions in disease conditions.
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Affiliation(s)
- S Toegel
- Medical University Vienna, Vienna, Austria,Laboratory for Cartilage Biology, Research Division, Hospital for Special Surgery, Weill Cornell Medical College, New York, USA,Corresponding author Stefan Toegel, Medical University Vienna, Waehringer Guertel 18–20, 1090 Vienna, Austria, Tel: 0043 1 4277 55461, Fax: 0043 1 4277 9554,
| | - M Pabst
- Department of Chemistry, University of Natural Resources and Applied Life Sciences, Vienna, Austria
| | - SQ Wu
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Vienna, Vienna, Austria,Department of Pharmacology and Toxicology, University of Vienna, Vienna, Austria
| | - J Grass
- Department of Chemistry, University of Natural Resources and Applied Life Sciences, Vienna, Austria
| | - MB Goldring
- Laboratory for Cartilage Biology, Research Division, Hospital for Special Surgery, Weill Cornell Medical College, New York, USA
| | - C Chiari
- Department of Orthopedics, Medical University Vienna, Vienna, Austria
| | - A Kolb
- Department of Orthopedics, Medical University Vienna, Vienna, Austria
| | - F Altmann
- Department of Chemistry, University of Natural Resources and Applied Life Sciences, Vienna, Austria
| | - H Viernstein
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Vienna, Vienna, Austria
| | - FM Unger
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Vienna, Vienna, Austria
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13
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Lectin binding patterns reflect the phenotypic status of in vitro chondrocyte models. In Vitro Cell Dev Biol Anim 2009; 45:351-60. [DOI: 10.1007/s11626-009-9186-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Accepted: 01/29/2009] [Indexed: 11/26/2022]
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Primary human osteoblasts and bone cancer cells as models to study glycodynamics in bone. Int J Biochem Cell Biol 2007; 40:471-83. [PMID: 17931955 DOI: 10.1016/j.biocel.2007.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2007] [Revised: 07/24/2007] [Accepted: 08/21/2007] [Indexed: 01/01/2023]
Abstract
Bone cells produce many glycoproteins potentially involved in the maintenance of healthy bone tissues. Two cytokines produced in inflamed joints, tumor necrosis factor (TNF)alpha and transforming growth factor (TGF)beta, have previously been shown to alter cellular glycosylation which may potentially affect the expression and function of glycoproteins. In order to evaluate models to study the glycodynamics of bone cells, we examined primary human osteoblastic cells from osteoarthritis patients, and compared these to human osteosarcoma cells MG63 and SJSA-1. We showed here for the first time that all of the human osteoblastic cells actively synthesize complex N- and O-glycan chains of bone cell glycoproteins, with quantitative differences between cell types. TNFalpha-induced apoptosis or TGFbeta-induced cell differentiation and proliferation had significant effects on both cell surface carbohydrates and glycosyltransferase activities of osteoblasts and osteosarcoma cells. The results indicate that cultured human bone-derived osteoblastic cells are good models to examine the glycodynamics of osteoblasts under conditions of cell growth and cell death. The changes induced by cytokines can result in altered cell surface functions which may be of importance in osteoarthritis, osteoporosis and other bone diseases.
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Li Y, Yang X, Nguyen AHT, Brockhausen I. Requirement of N-glycosylation for the secretion of recombinant extracellular domain of human Fas in HeLa cells. Int J Biochem Cell Biol 2007; 39:1625-36. [PMID: 17544837 DOI: 10.1016/j.biocel.2007.04.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2007] [Revised: 03/14/2007] [Accepted: 04/02/2007] [Indexed: 10/23/2022]
Abstract
Apoptosis has been shown to be associated with altered glycosylation patterns and biosynthesis of glycoproteins. A major cell surface receptor involved in the induction of apoptosis is Fas that is activated by binding Fas ligand but can also be activated by binding anti-Fas antibody. In order to determine whether the Fas receptor is glycosylated, the extracellular domain of human Fas (shFas) was expressed as a cleavable fusion protein (shFas-Fc) in HeLa cells. These cells were shown to express activities of glycosyltransferases involved in N- and O-glycan biosynthesis. The secreted shFas-Fc was shown to be a glycoprotein with heterogeneous glycan chains. MALDI mass spectrometry revealed a disperse molecular weight of shFas with an average of 23.4kDa. Western blots of shFas-Fc secreted from tunicamycin treated transfected HeLa cells showed that only N-glycosylated glycoforms were secreted, while the unglycosylated shFas-Fc remained intracellular. The results suggest that both N-glycosylation sites of the extracellular domain of Fas are occupied with large N-glycans that play a role in the expression of the glycoprotein.
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Affiliation(s)
- Yi Li
- Department of Medicine, Division of Rheumatology, Human Mobility Research Center and The Arthritis Center, Queen's University, Kingston, Ontario K7L 3N6, Canada
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