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Tingling JD, Bake S, Holgate R, Rawlings J, Nagsuk PP, Chandrasekharan J, Schneider SL, Miranda RC. CD24 expression identifies teratogen-sensitive fetal neural stem cell subpopulations: evidence from developmental ethanol exposure and orthotopic cell transfer models. PLoS One 2013; 8:e69560. [PMID: 23894503 PMCID: PMC3718834 DOI: 10.1371/journal.pone.0069560] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 06/10/2013] [Indexed: 11/18/2022] Open
Abstract
Background Ethanol is a potent teratogen. Its adverse neural effects are partly mediated by disrupting fetal neurogenesis. The teratogenic process is poorly understood, and vulnerable neurogenic stages have not been identified. Identifying these is a prerequisite for therapeutic interventions to mitigate effects of teratogen exposures. Methods We used flow cytometry and qRT-PCR to screen fetal mouse-derived neurosphere cultures for ethanol-sensitive neural stem cell (NSC) subpopulations, to study NSC renewal and differentiation. The identity of vulnerable NSC populations was validated in vivo, using a maternal ethanol exposure model. Finally, the effect of ethanol exposure on the ability of vulnerable NSC subpopulations to integrate into the fetal neurogenic environment was assessed following ultrasound guided, adoptive transfer. Results Ethanol decreased NSC mRNAs for c-kit, Musashi-1and GFAP. The CD24+ NSC population, specifically the CD24+CD15+ double-positive subpopulation, was selectively decreased by ethanol. Maternal ethanol exposure also resulted in decreased fetal forebrain CD24 expression. Ethanol pre-exposed CD24+ cells exhibited increased proliferation, and deficits in cell-autonomous and cue-directed neuronal differentiation, and following orthotopic transplantation into naïve fetuses, were unable to integrate into neurogenic niches. CD24depleted cells retained neurosphere regeneration capacity, but following ethanol exposure, generated increased numbers of CD24+ cells relative to controls. Conclusions Neuronal lineage committed CD24+ cells exhibit specific vulnerability, and ethanol exposure persistently impairs this population’s cell-autonomous differentiation capacity. CD24+ cells may additionally serve as quorum sensors within neurogenic niches; their loss, leading to compensatory NSC activation, perhaps depleting renewal capacity. These data collectively advance a mechanistic hypothesis for teratogenesis leading to microencephaly.
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Affiliation(s)
- Joseph D. Tingling
- Department of Neuroscience & Experimental Therapeutics, Texas A&M Health Science Center, Bryan, Texas, United States of America
- Women’s Health in Neuroscience Program, Texas A&M Health Science Center, Bryan, Texas, United States of America
| | - Shameena Bake
- Department of Neuroscience & Experimental Therapeutics, Texas A&M Health Science Center, Bryan, Texas, United States of America
- Women’s Health in Neuroscience Program, Texas A&M Health Science Center, Bryan, Texas, United States of America
| | - Rhonda Holgate
- Department of Neuroscience & Experimental Therapeutics, Texas A&M Health Science Center, Bryan, Texas, United States of America
- Women’s Health in Neuroscience Program, Texas A&M Health Science Center, Bryan, Texas, United States of America
| | - Jeremy Rawlings
- Department of Neuroscience & Experimental Therapeutics, Texas A&M Health Science Center, Bryan, Texas, United States of America
- Women’s Health in Neuroscience Program, Texas A&M Health Science Center, Bryan, Texas, United States of America
| | - Phillips P. Nagsuk
- Department of Neuroscience & Experimental Therapeutics, Texas A&M Health Science Center, Bryan, Texas, United States of America
- Women’s Health in Neuroscience Program, Texas A&M Health Science Center, Bryan, Texas, United States of America
| | - Jayashree Chandrasekharan
- Department of Neuroscience & Experimental Therapeutics, Texas A&M Health Science Center, Bryan, Texas, United States of America
- Women’s Health in Neuroscience Program, Texas A&M Health Science Center, Bryan, Texas, United States of America
| | - Sarah L. Schneider
- Department of Neuroscience & Experimental Therapeutics, Texas A&M Health Science Center, Bryan, Texas, United States of America
- Women’s Health in Neuroscience Program, Texas A&M Health Science Center, Bryan, Texas, United States of America
| | - Rajesh C. Miranda
- Department of Neuroscience & Experimental Therapeutics, Texas A&M Health Science Center, Bryan, Texas, United States of America
- Women’s Health in Neuroscience Program, Texas A&M Health Science Center, Bryan, Texas, United States of America
- * E-mail:
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Trinidad JC, Schoepfer R, Burlingame AL, Medzihradszky KF. N- and O-glycosylation in the murine synaptosome. Mol Cell Proteomics 2013; 12:3474-88. [PMID: 23816992 DOI: 10.1074/mcp.m113.030007] [Citation(s) in RCA: 136] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We present the first large scale study characterizing both N- and O-linked glycosylation in a site-specific manner on hundreds of proteins. We demonstrate that a lectin-affinity fractionation step using wheat germ agglutinin enriches not only peptides carrying intracellular O-GlcNAc, but also those bearing ER/Golgi-derived N- and O-linked carbohydrate structures. Liquid chromatography-MS (LC/MS) analysis with high accuracy precursor mass measurements and high sensitivity ion trap electron-transfer dissociation (ETD) were utilized for structural characterization of glycopeptides. Our results reveal both the identity of the precise sites of glycosylation and information on the oligosaccharide structures possible on these proteins. We report a novel iterative approach that allowed us to interpret the ETD data set directly without making prior assumptions about the nature and distribution of oligosaccharides present in our glycopeptide mixture. Over 2500 unique N- and O-linked glycopeptides were identified on 453 proteins. The extent of microheterogeneity varied extensively, and up to 19 different oligosaccharides were attached at a given site. We describe the presence of the well-known mucin-type structures for O-glycosylation, an EGF-domain-specific fucosylation and a rare O-mannosylation on the transmembrane phosphatase Ptprz1. Finally, we identified three examples of O-glycosylation on tyrosine residues.
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Affiliation(s)
- Jonathan C Trinidad
- Department of Pharmaceutical Chemistry, Mass Spectrometry Facility, School of Pharmacy, University of California San Francisco, San Francisco, California 94158-2517
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Pacharra S, Hanisch FG, Mühlenhoff M, Faissner A, Rauch U, Breloy I. The Lecticans of Mammalian Brain Perineural Net Are O-Mannosylated. J Proteome Res 2013; 12:1764-71. [DOI: 10.1021/pr3011028] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sandra Pacharra
- Institute of Biochemistry II, Medical Faculty, University of Cologne, Köln, Germany
| | - Franz-Georg Hanisch
- Institute of Biochemistry II, Medical Faculty, University of Cologne, Köln, Germany
- Center for Molecular Medicine Cologne, University of Cologne, Köln, Germany
| | | | - Andreas Faissner
- Department for Cell Morphology and Molecular
Neurobiology, Ruhr-University Bochum, Bochum,
Germany
| | - Uwe Rauch
- Department of Experimental
Medical Science, Biomedical Center B12, Lund University, Lund, Sweden
| | - Isabelle Breloy
- Institute of Biochemistry II, Medical Faculty, University of Cologne, Köln, Germany
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Loibl M, Strahl S. Protein O-mannosylation: what we have learned from baker's yeast. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2013; 1833:2438-46. [PMID: 23434682 DOI: 10.1016/j.bbamcr.2013.02.008] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 02/05/2013] [Accepted: 02/10/2013] [Indexed: 01/06/2023]
Abstract
BACKGROUND Protein O-mannosylation is a vital type of glycosylation that is conserved among fungi, animals, and humans. It is initiated in the endoplasmic reticulum (ER) where the synthesis of the mannosyl donor substrate and the mannosyltransfer to proteins take place. O-mannosylation defects interfere with cell wall integrity and ER homeostasis in yeast, and define a pathomechanism of severe neuromuscular diseases in humans. SCOPE OF REVIEW On the molecular level, the O-mannosylation pathway and the function of O-mannosyl glycans have been characterized best in the eukaryotic model yeast Saccharomyces cerevisiae. In this review we summarize general features of protein O-mannosylation, including biosynthesis of the mannosyl donor, characteristics of acceptor substrates, and the protein O-mannosyltransferase machinery in the yeast ER. Further, we discuss the role of O-mannosyl glycans and address the question why protein O-mannosylation is essential for viability of yeast cells. GENERAL SIGNIFICANCE Understanding of the molecular mechanisms of protein O-mannosylation in yeast could lead to the development of novel antifungal drugs. In addition, transfer of the knowledge from yeast to mammals could help to develop diagnostic and therapeutic approaches in the frame of neuromuscular diseases. This article is part of a Special Issue entitled: Functional and structural diversity of endoplasmic reticulum.
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Suzuki-Anekoji M, Suzuki A, Wu SW, Angata K, Murai KK, Sugihara K, Akama TO, Khoo KH, Nakayama J, Fukuda MN, Fukuda M. In vivo regulation of steroid hormones by the Chst10 sulfotransferase in mouse. J Biol Chem 2012; 288:5007-16. [PMID: 23269668 PMCID: PMC3576103 DOI: 10.1074/jbc.m112.433474] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chst10 adds sulfate to glucuronic acid to form a carbohydrate antigen, HNK-1, in glycoproteins and glycolipids. To determine the role of Chst10 in vivo, we generated systemic Chst10-deficient mutant mice. Although Chst10−/− mice were born and grew to adulthood with no gross defects, they were subfertile. Uteri from Chst10−/− females at the pro-estrus stage were larger than those from wild-type females and exhibited a thick uterine endometrium. Serum estrogen levels in Chst10−/− females were higher than those from wild-type females, suggesting impaired down-regulation of estrogen. Because steroid hormones are often conjugated to glucuronic acid, we hypothesized that Chst10 sulfates glucuronidated steroid hormone to regulate steroid hormone in vivo. Enzymatic activity assays and structural analysis of Chst10 products by HPLC and mass spectrometry revealed that Chst10 indeed sulfates glucuronidated estrogen, testosterone, and other steroid hormones. We also identified an HPLC peak corresponding to sulfated and glucuronidated estradiol in serum from wild-type but not from Chst10 null female mice. Estrogen-response element reporter assays revealed that Chst10-modified estrogen likely did not bind to its receptor. These results suggest that subfertility exhibited by female mice following Chst10 loss results from dysregulation of estrogen. Given that Chst10 transfers sulfates to several steroid hormones, Chst10 likely functions in widespread regulation of steroid hormones in vivo.
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Affiliation(s)
- Misa Suzuki-Anekoji
- Glycobiology Unit, Tumor Microenvironment Program, Cancer Center, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, USA
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Kizuka Y, Oka S. Regulated expression and neural functions of human natural killer-1 (HNK-1) carbohydrate. Cell Mol Life Sci 2012; 69:4135-47. [PMID: 22669261 PMCID: PMC11114532 DOI: 10.1007/s00018-012-1036-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 05/15/2012] [Accepted: 05/16/2012] [Indexed: 12/23/2022]
Abstract
Human natural killer-1 (HNK-1) carbohydrate, comprising a unique trisaccharide HSO(3)-3GlcAβ1-3Galβ1-4GlcNAc, shows well-regulated expression and unique functions in the nervous system. Recent studies have revealed sophisticated and complicated expression mechanisms for HNK-1 glycan. Activities of biosynthetic enzymes are controlled through the formation of enzyme-complexes and regulation of subcellular localization. Functional aspects of HNK-1 carbohydrate were examined by overexpression, knockdown, and knockout studies of these enzymes. HNK-1 is involved in several neural functions such as synaptic plasticity, learning and memory, and the underlying molecular mechanisms have been illustrated upon identification of the target carrier glycoproteins of HNK-1 such as the glutamate receptor subunit GluA2 or tenascin-R. In this review, we describe recent findings about HNK-1 carbohydrate that provide further insights into the mechanism of its expression and function in the nervous system.
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Affiliation(s)
- Yasuhiko Kizuka
- Disease Glycomics Team, Systems Glycobiology Research Group, Advanced Science Institute, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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Gouveia R, Schaffer L, Papp S, Grammel N, Kandzia S, Head SR, Kleene R, Schachner M, Conradt HS, Costa J. Expression of glycogenes in differentiating human NT2N neurons. Downregulation of fucosyltransferase 9 leads to decreased Lewis(x) levels and impaired neurite outgrowth. Biochim Biophys Acta Gen Subj 2012; 1820:2007-19. [PMID: 23000574 DOI: 10.1016/j.bbagen.2012.09.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 09/07/2012] [Accepted: 09/10/2012] [Indexed: 12/12/2022]
Abstract
BACKGROUND Several glycan structures are functionally relevant in biological events associated with differentiation and regeneration which occur in the central nervous system. Here we have analysed the glycogene expression and glycosylation patterns during human NT2N neuron differentiation. We have further studied the impact of downregulating fucosyltransferase 9 (FUT9) on neurite outgrowth. METHODS The expression of glycogenes in human NT2N neurons differentiating from teratocarcinoma NTERA-2/cl.D1 cells has been analysed using the GlycoV4 GeneChip expression microarray. Changes in glycosylation have been monitored by immunoblot, immunofluorescence microscopy, HPLC and MALDI-TOF MS. Peptide mass fingerprinting and immunoprecipitation have been used for protein identification. FUT9 was downregulated using silencing RNA. RESULTS AND CONCLUSIONS One hundred twelve mRNA transcripts showed statistically significant up-regulation, including the genes coding for proteins involved in the synthesis of the Lewis(x) motif (FUT9), polysialic acid (ST8SIA2 and ST8SIA4) and HNK-1 (B3GAT2). Accordingly, increased levels of the corresponding carbohydrate epitopes have been observed. The Lewis(x) structure was found in a carrier glycoprotein that was identified as the CRA-a isoform of human neural cell adhesion molecule 1. Downregulation of FUT9 caused significant decreases in the levels of Lewis(x), as well as GAP-43, a marker of neurite outgrowth. Concomitantly, a reduction in neurite formation and outgrowth has been observed that was reversed by FUT9 overexpression. GENERAL SIGNIFICANCE These results provided information about the regulation of glycogenes during neuron differentiation and they showed that the Lewis(x) motif plays a functional role in neurite outgrowth from human neurons.
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Affiliation(s)
- Ricardo Gouveia
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Avenida da República, Oeiras, Portugal
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Pacharra S, Hanisch FG, Breloy I. Neurofascin 186 is O-mannosylated within and outside of the mucin domain. J Proteome Res 2012; 11:3955-64. [PMID: 22746206 DOI: 10.1021/pr200996y] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Protein O-mannosylation is an important modification in mammals, and deficiencies thereof lead to a variety of severe phenotypes. Although it has already been shown that the amount of O-mannosyl glycans in brain is very high, only very few proteins have been identified as O-mannosylated. Additionally, the functions of the O-mannose-based glycans are still speculative and only investigated for α-dystroglycan. In a previous study a cis-located peptide was identified, which controls O-mannosylation in mammals. A BLAST search on the basis of this peptidic determinant identified other potential O-mannosylated proteins. Among these neurofascin was chosen for further analysis as a recombinant probe (mucin domain) and as an endogenous protein from mouse brain. Mass spectrometric data for both proteins confirmed that neurofascin186 is indeed O-mannosylated. Glycopeptide analysis by liquid chromatography-tandem mass spectrometry allowed for the identification of some of the O-mannosylation sites, which are not restricted to the mucin domain but were found also within N-terminal IgG and Fibronectin domains of the protein.
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Affiliation(s)
- Sandra Pacharra
- Institute of Biochemistry II, Medical Faculty, University of Cologne, Joseph-Stelzmann-Str. 52, 50931 Köln, Germany
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Dwyer CA, Baker E, Hu H, Matthews RT. RPTPζ/phosphacan is abnormally glycosylated in a model of muscle-eye-brain disease lacking functional POMGnT1. Neuroscience 2012; 220:47-61. [PMID: 22728091 DOI: 10.1016/j.neuroscience.2012.06.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 05/09/2012] [Accepted: 06/11/2012] [Indexed: 01/06/2023]
Abstract
Congenital muscular dystrophies (CMDs) with associated brain abnormalities are a group of disorders characterized by muscular dystrophy and brain and eye abnormalities that are frequently caused by mutations in known or putative glycotransferases involved in protein O-mannosyl glycosylation. Previous work identified α-dystroglycan as the major substrate for O-mannosylation and its altered glycosylation the major cause of these disorders. However, work from several labs indicated that other proteins in the brain are also O-mannosylated and therefore could contribute to CMD pathology in patients with mutations in the protein O-mannosylation pathway, however few of these proteins have been identified and fully characterized in CMDs. In this study we identify receptor protein tyrosine phosphatase ζ (RPTPζ) and its secreted variant, phosphacan, as another potentially important substrate for protein O-mannosylation in the brain. Using a mouse model of muscle-eye-brain disease lacking functional protein O-mannose β-1,2-N-acetylglucosaminyltransferase (POMGnT1), we show that RPTPζ/phosphacan is shifted to a lower molecular weight and distinct carbohydrate epitopes normally detected on the protein are either absent or substantially reduced, including Human Natural Killer-1 (HNK-1) reactivity. The spatial and temporal expression patterns of these O-mannosylated forms of RPTPζ/phosphacan and its hypoglycosylation and loss of HNK-1 glycan epitopes in POMGnT1 knockouts are suggestive of a role in the neural phenotypes observed in patients and animal models of CMDs.
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Affiliation(s)
- C A Dwyer
- The Department of Neuroscience and Physiology, SUNY Upstate Medical University, Syracuse, NY 13210, USA.
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Clinical value of CD24 expression in retinoblastoma. J Biomed Biotechnol 2012; 2012:158084. [PMID: 22745528 PMCID: PMC3382394 DOI: 10.1155/2012/158084] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2011] [Accepted: 02/06/2012] [Indexed: 01/02/2023] Open
Abstract
Background. The expression of CD24 has been detected in a wide variety of human malignancies. Downregulation of CD24 inhibits proliferation and induces apoptosis in tumor cells, whereas its upregulation increases tumor growth and metastasis. However, no data on CD24 protein levels in retinoblastoma are available, and the mechanism of CD24 involvement in retinoblastoma progress has not been elucidated. The aim of this study was to explore the expression profile of CD24 in the retinoblastoma tumor samples and to correlate with clinicopathological parameters. Methods. Immunohistochemistry was performed for CD24 on the archival paraffin sections of retinoblastoma and correlated with clinicopathological features. Western blotting was performed to confirm immunoreactivity results. Results. CD24 immunoreactivity was observed in 72.0% (36/50) of the retinoblastoma specimens. Among the 35 low-risk tumors, CD24 was expressed in 62.9% (22/35) tumors and among the 15 high-risk tumors, CD24 was expressed in 93.3% (14/15) tumors. High-risk tumors showed significantly increased expression of CD24 compared to tumors with low-risk (P < 0.05). Conclusions. This is the first correlation between CD24 expression and histopathology in human retinoblastoma. Our study showed increased expression of CD24 in high risk tumors compared to low risk tumors. Further functional studies are required to explore the role of CD24 in retinoblastoma.
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Roscioli T, Kamsteeg EJ, Buysse K, Maystadt I, van Reeuwijk J, van den Elzen C, van Beusekom E, Riemersma M, Pfundt R, Vissers LE, Schraders M, Altunoglu U, Buckley MF, Brunner HG, Grisart B, Zhou H, Veltman JA, Gilissen C, Mancini GM, Delrée P, Willemsen MA, Ramadža DP, Chitayat D, Bennett C, Sheridan E, Peeters EA, Tan-Sindhunata GM, de Die-Smulders CE, Devriendt K, Kayserili H, El-Hashash OAEF, Stemple DL, Lefeber DJ, Lin YY, van Bokhoven H. Mutations in ISPD cause Walker-Warburg syndrome and defective glycosylation of α-dystroglycan. Nat Genet 2012; 44:581-5. [PMID: 22522421 PMCID: PMC3378661 DOI: 10.1038/ng.2253] [Citation(s) in RCA: 152] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 03/21/2012] [Indexed: 11/30/2022]
Abstract
Walker-Warburg syndrome (WWS) is an autosomal recessive multisystem disorder characterized by complex eye and brain abnormalities with congenital muscular dystrophy (CMD) and aberrant a-dystroglycan glycosylation. Here we report mutations in the ISPD gene (encoding isoprenoid synthase domain containing) as the second most common cause of WWS. Bacterial IspD is a nucleotidyl transferase belonging to a large glycosyltransferase family, but the role of the orthologous protein in chordates is obscure to date, as this phylum does not have the corresponding non-mevalonate isoprenoid biosynthesis pathway. Knockdown of ispd in zebrafish recapitulates the human WWS phenotype with hydrocephalus, reduced eye size, muscle degeneration and hypoglycosylated a-dystroglycan. These results implicate ISPD in a-dystroglycan glycosylation in maintaining sarcolemma integrity in vertebrates.
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Affiliation(s)
- Tony Roscioli
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- School of Women’s and Children’s Health, Sydney Children’s hospital and the University of New South Wales, Sydney, Australia
| | - Erik-Jan Kamsteeg
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Karen Buysse
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Isabelle Maystadt
- Centre de Génétique Humaine, Institut de Pathologie et de Génétique, Gosselies, Belgium
| | - Jeroen van Reeuwijk
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Christa van den Elzen
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Ellen van Beusekom
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Moniek Riemersma
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- Department of Neurology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Rolph Pfundt
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Lisenka E.L.M. Vissers
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Margit Schraders
- Department of Otorhinolaryngology, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen
| | - Umut Altunoglu
- Medical Genetics Department, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Michael F. Buckley
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- School of Women’s and Children’s Health, Sydney Children’s hospital and the University of New South Wales, Sydney, Australia
| | - Han G. Brunner
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Bernard Grisart
- Centre de Génétique Humaine, Institut de Pathologie et de Génétique, Gosselies, Belgium
| | - Huiqing Zhou
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Joris A. Veltman
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Christian Gilissen
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | | | - Paul Delrée
- Centre de Génétique Humaine, Institut de Pathologie et de Génétique, Gosselies, Belgium
| | - Michèl A. Willemsen
- Department of Neurology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | | | - David Chitayat
- Mount Sinai Hospital, The Prenatal Diagnosis and Medical Genetics Program, Department of Obstetrics and Gynecology, University of Toronto, Toronto, Canada
- The Hospital for Sick Children, Division of Clinical and Metabolic Genetics, Toronto, Canada
| | - Christopher Bennett
- Department of Clinical Genetics, St James’s University Hospital, Leeds, United Kingdom
| | - Eamonn Sheridan
- Department of Clinical Genetics, St James’s University Hospital, Leeds, United Kingdom
| | | | | | | | - Koenraad Devriendt
- Center for Human Genetics, Clinical Genetics, Catholic University Leuven, Leuven, Belgium
| | - Hülya Kayserili
- Medical Genetics Department, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | | | - Derek L. Stemple
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SA, United Kingdom
| | - Dirk J. Lefeber
- Department of Neurology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
- Laboratory for Genetic, Endocrine and Metabolic Disease, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Yung-Yao Lin
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SA, United Kingdom
| | - Hans van Bokhoven
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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Suzuki-Anekoji M, Suzuki M, Kobayashi T, Sato Y, Nakayama J, Suzuki A, Bao X, Angata K, Fukuda M. HNK-1 glycan functions as a tumor suppressor for astrocytic tumor. J Biol Chem 2011; 286:32824-33. [PMID: 21784847 DOI: 10.1074/jbc.m111.245886] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Astrocytic tumor is the most prevalent primary brain tumor. However, the role of cell surface carbohydrates in astrocytic tumor invasion is not known. In a previous study, we showed that polysialic acid facilitates astrocytic tumor invasion and thereby tumor progression. Here, we examined the role of HNK-1 glycan in astrocytic tumor invasion. A Kaplan-Meier analysis of 45 patients revealed that higher HNK-1 expression levels were positively associated with increased survival of patients. To determine the role of HNK-1 glycan, we transfected C6 glioma cells, which lack HNK-1 glycan expression, with β1,3-glucuronyltransferase-P cDNA, generating HNK-1-positive cells. When these cells were injected into the mouse brain, the resultant tumors were 60% smaller than tumors emerging from injection of the mock-transfected HNK-1-negative C6 cells. HNK-1-positive C6 cells also grew more slowly than mock-transfected C6 cells in anchorage-dependent and anchorage-independent assays. C6-HNK-1 cells migrated well after treatment of anti-β1 integrin antibody, whereas the same treatment inhibited cell migration of mock-transfected C6 cells. Similarly, α-dystroglycan containing HNK-1 glycan is different from those containing the laminin-binding glycans, supporting the above conclusion that C6-HNK-1 cells migrate independently from β1-integrin-mediated signaling. Moreover, HNK-1-positive cells exhibited attenuated activation of ERK 1/2 compared with mock-transfected C6 cells, whereas focal adhesion kinase activation was equivalent in both cell types. Overall, these results indicate that HNK-1 glycan functions as a tumor suppressor.
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Affiliation(s)
- Misa Suzuki-Anekoji
- Tumor Microenvironment Program, Cancer Research Center, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, USA
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von der Lieth CW, Freire AA, Blank D, Campbell MP, Ceroni A, Damerell DR, Dell A, Dwek RA, Ernst B, Fogh R, Frank M, Geyer H, Geyer R, Harrison MJ, Henrick K, Herget S, Hull WE, Ionides J, Joshi HJ, Kamerling JP, Leeflang BR, Lütteke T, Lundborg M, Maass K, Merry A, Ranzinger R, Rosen J, Royle L, Rudd PM, Schloissnig S, Stenutz R, Vranken WF, Widmalm G, Haslam SM. EUROCarbDB: An open-access platform for glycoinformatics. Glycobiology 2011; 21:493-502. [PMID: 21106561 PMCID: PMC3055595 DOI: 10.1093/glycob/cwq188] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 11/03/2010] [Accepted: 11/03/2010] [Indexed: 01/03/2023] Open
Abstract
The EUROCarbDB project is a design study for a technical framework, which provides sophisticated, freely accessible, open-source informatics tools and databases to support glycobiology and glycomic research. EUROCarbDB is a relational database containing glycan structures, their biological context and, when available, primary and interpreted analytical data from high-performance liquid chromatography, mass spectrometry and nuclear magnetic resonance experiments. Database content can be accessed via a web-based user interface. The database is complemented by a suite of glycoinformatics tools, specifically designed to assist the elucidation and submission of glycan structure and experimental data when used in conjunction with contemporary carbohydrate research workflows. All software tools and source code are licensed under the terms of the Lesser General Public License, and publicly contributed structures and data are freely accessible. The public test version of the web interface to the EUROCarbDB can be found at http://www.ebi.ac.uk/eurocarb.
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Affiliation(s)
| | - Ana Ardá Freire
- Bijvoet-Center for Biomolecular Research, University of Utrecht, Utrecht, The Netherlands
| | - Dennis Blank
- Institute of Biochemistry, Faculty of Medicine, Justus, Liebig University, Giessen, Germany
| | - Matthew P Campbell
- Dublin-Oxford Glycobiology Laboratory, National Institute for Bioprocessing Research and Training (NIBRT), Conway Institute, University College Dublin, Dublin, Ireland
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, UK
| | - Alessio Ceroni
- Division of Molecular Biosciences, Faculty of Natural Sciences, Biochemistry Building, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - David R Damerell
- Division of Molecular Biosciences, Faculty of Natural Sciences, Biochemistry Building, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Anne Dell
- Division of Molecular Biosciences, Faculty of Natural Sciences, Biochemistry Building, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Raymond A Dwek
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, UK
| | - Beat Ernst
- Department of Pharmaceutical Science, University of Basel, BaselSwitzerland
| | - Rasmus Fogh
- European Bioinformatics Institute, Hinxton, UK
| | - Martin Frank
- Core Facility, Molecular Structure Analysis, German Cancer Research Center, Heidelberg, Germany
| | - Hildegard Geyer
- Institute of Biochemistry, Faculty of Medicine, Justus, Liebig University, Giessen, Germany
| | - Rudolf Geyer
- Institute of Biochemistry, Faculty of Medicine, Justus, Liebig University, Giessen, Germany
| | | | - Kim Henrick
- European Bioinformatics Institute, Hinxton, UK
| | - Stefan Herget
- Core Facility, Molecular Structure Analysis, German Cancer Research Center, Heidelberg, Germany
| | - William E Hull
- Core Facility, Molecular Structure Analysis, German Cancer Research Center, Heidelberg, Germany
| | | | - Hiren J Joshi
- Core Facility, Molecular Structure Analysis, German Cancer Research Center, Heidelberg, Germany
- European Bioinformatics Institute, Hinxton, UK
| | - Johannis P Kamerling
- Bijvoet-Center for Biomolecular Research, University of Utrecht, Utrecht, The Netherlands
| | - Bas R Leeflang
- Bijvoet-Center for Biomolecular Research, University of Utrecht, Utrecht, The Netherlands
| | - Thomas Lütteke
- Bijvoet-Center for Biomolecular Research, University of Utrecht, Utrecht, The Netherlands
| | | | - Kai Maass
- Institute of Biochemistry, Faculty of Medicine, Justus, Liebig University, Giessen, Germany
| | | | - René Ranzinger
- Core Facility, Molecular Structure Analysis, German Cancer Research Center, Heidelberg, Germany
| | - Jimmy Rosen
- Bijvoet-Center for Biomolecular Research, University of Utrecht, Utrecht, The Netherlands
| | - Louise Royle
- Dublin-Oxford Glycobiology Laboratory, National Institute for Bioprocessing Research and Training (NIBRT), Conway Institute, University College Dublin, Dublin, Ireland
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, UK
| | - Pauline M Rudd
- Dublin-Oxford Glycobiology Laboratory, National Institute for Bioprocessing Research and Training (NIBRT), Conway Institute, University College Dublin, Dublin, Ireland
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, UK
| | - Siegfried Schloissnig
- Core Facility, Molecular Structure Analysis, German Cancer Research Center, Heidelberg, Germany
| | - Roland Stenutz
- Organic Chemistry, Stockholm University, Stockholm, Sweden
| | | | - Göran Widmalm
- Organic Chemistry, Stockholm University, Stockholm, Sweden
| | - Stuart M Haslam
- Division of Molecular Biosciences, Faculty of Natural Sciences, Biochemistry Building, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
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Abstract
The profound biological relevance of protein and lipid glycosylation has made glycomics (i.e., the comprehensive study of all glycans in a cell or organism), an indispensable field of research in the life sciences. Consequently, numerous strategies have been developed for a high-throughput analysis of complex glycan mixtures, with mass spectrometry (MS) playing a key role. In particular, nanoelectrospray ionization (ESI-) MS( n ), employing multiple cycles of isolation and fragmentation of native or derivatized precursor ions, is recognized as a highly valuable tool in this context, as it allows, at least in part, structural characterization of glycans without prior fractionation. This chapter describes suitable work flows for this purpose and illustrates both advantages and limitations for this type of analysis. Furthermore, the use of newly developed software tools for data handling is outlined.
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Affiliation(s)
- Christina Bleckmann
- Institute of Biochemistry, Faculty of Medicine, University of Giessen, Giessen, Germany
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65
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Molecular and clinical dissection of CD24 antibody specificity by a comprehensive comparative analysis. J Transl Med 2010; 90:1102-16. [PMID: 20351695 DOI: 10.1038/labinvest.2010.70] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
CD24 is a small, highly glycosylated cell surface protein that is linked to the membrane through a glycosyl-phosphatidylinositol anchor. It is overexpressed in many human carcinomas and its expression is linked to bad prognosis. Lately, lack or low expression of CD24 was used to identify tumor stem cells resulting in conflicting data on the usefulness of this marker. In many immunohistochemical studies, the mAb SN3b was used but the epitope and specificity of this antibody have never been thoroughly investigated. In other studies based mainly on cytofluorographic analysis, the mAb ML-5 was applied. In this study, we compared the epitope of mAb SN3b to the CD24 mAbs SWA-11 and ML-5 that both bind to the core protein of CD24. Using tissue microarrays and affinity-purified CD24 glycoforms, we observed only a partial overlap of SN3b and SWA11 reactivity. The mAb SN3b recognizes sialic acid most likely on O-linked glycans that can occur independently of the CD24 protein backbone. The SN3b epitope was not related to common sialylated cancer-associated glycan structures. Both SN3b epitope positive or negative CD24 glycoforms supported the binding of P-selectin and Siglec-5. In breast cancer, the SN3b reactivity was associated with bad prognosis, whereas SWA11 was not. In renal cell cancer, the SN3b epitope was completely absent but SWA11 reactivity was a prognostic factor. Our results shed new light on the tumorbiological role of CD24 and resolve discrepancies in the literature related to the use of different CD24 mAbs.
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66
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Abstract
As a testament to the importance of CD24, researchers with diverse interests, including adaptive immunity, inflammation, autoimmune diseases and cancer, have encountered CD24. CD24 is overexpressed in many cancers and appears oncogenic. In the adaptive immune response, CD24 is a redundant costimulatory molecule in costimulation-rich lymphoid organs but is essential in selected target organs tested, such as brain and skin. More recent studies suggest it may have a role in discriminating danger and pathogen-associated molecular patterns by dendritic cells. The biology of CD24 is intriguing but poorly understood. Here we summarize the major findings associated with CD24 to stimulate new ideas for further research that may reveal the underlying link among the diverse processes mediated by CD24.
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67
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Katagihallimath N, Mehanna A, Guseva D, Kleene R, Schachner M. Identification and validation of a Lewis x glycomimetic peptide. Eur J Cell Biol 2009; 89:77-86. [PMID: 19962782 DOI: 10.1016/j.ejcb.2009.10.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Glycans play important roles in regulating cell recognition and interactions to fine tune development, and synaptic plasticity and regeneration in the adult nervous system. The spatial and temporal expression pattern of Lewis(x) (a terminal trisaccharide epitope characterized by alpha1,3-fucosyl-N-acetyl-lactosamine) in the nervous system indicates an important role of this epitope in neurogenesis and brain development. Localization of Lewis(x) in the proliferative subventricular zone of the developing nervous system and also its expression on stem cells of the adult nervous system suggests a role in neurogenesis and hence regeneration. To provide an alternative tool to elucidate the functional roles of Lewis(x), we screened a random peptide phage library against a Lewis(x)-specific antibody to identify a Lewis(x) glycomimetic peptide. We identified a peptide that specifically bound to the Lewis(x)-specific antibody and this binding could be competed by the Lewis(x) glycan. Different aspects of the Lewis(x) glycomimetic peptide were investigated by introducing it in in vitro assays measuring neurite outgrowth and in in vivo assays to determine its efficacy in regeneration of peripheral nerve and spinal cord after injury in adult mice. In vitro, neurite outgrowth triggered by the Lewis(x-)carrying adhesion molecule CD24 was abolished alike by the Lewis(x) glycan and the glycomimetic peptide, while no influence of the glycomimetic peptide was seen in regeneration. Our results validate the use of Lewis(x) glycomimetic peptide as a functionally equivalent structure to the Lewis(x) glycan.
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Affiliation(s)
- Nainesh Katagihallimath
- Zentrum für Molekulare Neurobiologie, Universitätsklinikum Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
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68
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North SJ, Hitchen PG, Haslam SM, Dell A. Mass spectrometry in the analysis of N-linked and O-linked glycans. Curr Opin Struct Biol 2009; 19:498-506. [PMID: 19577919 PMCID: PMC2965404 DOI: 10.1016/j.sbi.2009.05.005] [Citation(s) in RCA: 187] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Revised: 05/11/2009] [Accepted: 05/28/2009] [Indexed: 01/01/2023]
Abstract
Mass spectrometry (MS) continues to play a vital role in defining the structures of N-glycans and O-glycans in glycoproteins via glycomic and glycoproteomic methodologies. The former seeks to define the total N-glycan and/or O-glycan repertoire in a biological sample whilst the latter is concerned with the analysis of glycopeptides. Recent technical developments have included improvements in tandem mass spectrometry (MS/MS and MS(n)) sequencing methodologies, more sensitive methods for analysing sulfated and polysialylated glycans and better procedures for defining the sites of O-glycosylation. New tools have been introduced to assist data handling and publicly accessible databases are being populated with glycomics data. Progress is exemplified by recent research in the fields of glycoimmunology, reproductive glycobiology, stem cells, bacterial glycosylation and non-mucin O-glycosylation.
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Affiliation(s)
- Simon J North
- Division of Molecular Biosciences, Faculty of Natural Sciences, Imperial College London, London SW7 2AZ, UK
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69
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Highlight: Perspectives in glycobiology. Biol Chem 2009; 390:519-20. [DOI: 10.1515/bc.2009.079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
No abstract available
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