1
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Šimunović J, Gašperšič J, Černigoj U, Vidič J, Štrancar A, Novokmet M, Razdorov G, Pezer M, Lauc G, Trbojević-Akmačić I. High-throughput immunoaffinity enrichment and N-glycan analysis of human plasma haptoglobin. Biotechnol Bioeng 2023; 120:491-502. [PMID: 36324280 DOI: 10.1002/bit.28280] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/24/2022] [Accepted: 10/30/2022] [Indexed: 11/06/2022]
Abstract
Haptoglobin (Hp) is a positive acute phase protein, synthesized in the liver, with four N-glycosylation sites carrying mainly complex type N-glycans. Its glycosylation is altered in different types of diseases but still has not been extensively studied mainly due to analytical challenges, especially the lack of a fast, efficient, and robust high-throughput Hp isolation procedure. Here, we describe the development of a high-throughput method for Hp enrichment from human plasma, based on monolithic chromatographic support in immunoaffinity mode and downstream Hp N-glycome analysis by hydrophilic interaction ultrahigh-performance liquid chromatography with fluorescent detection (HILIC-UHPLC-FLR). Chromatographic monolithic supports in a 96-well format enable fast, efficient, and robust Hp enrichment directly from diluted plasma samples. The N-glycome analysis demonstrated that a degree of Hp deglycosylation differs depending on the conditions used for N-glycan release and on the specific glycosylation site, with Asn 241 being the most resistant to deglycosylation under tested conditions. HILIC-UHPLC-FLR analysis enables robust quantification of 28 individual chromatographic peaks, in which N-glycan compositions were determined by UHPLC coupled to electrospray ionization quadrupole time of flight mass spectrometry. The developed analytical approach enables fast evaluation of total Hp N-glycosylation and is applicable in large-scale studies.
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Affiliation(s)
| | | | - Urh Černigoj
- Sartorius BIA Separations d.o.o., Ajdovščina, Slovenia
| | - Jana Vidič
- Sartorius BIA Separations d.o.o., Ajdovščina, Slovenia
| | - Aleš Štrancar
- Sartorius BIA Separations d.o.o., Ajdovščina, Slovenia
| | | | | | - Marija Pezer
- Genos Glycoscience Research Laboratory, Zagreb, Croatia
| | - Gordan Lauc
- Genos Glycoscience Research Laboratory, Zagreb, Croatia.,Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia
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2
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Lageveen‐Kammeijer GSM, Kuster B, Reusch D, Wuhrer M. High sensitivity glycomics in biomedicine. MASS SPECTROMETRY REVIEWS 2022; 41:1014-1039. [PMID: 34494287 PMCID: PMC9788051 DOI: 10.1002/mas.21730] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/23/2021] [Accepted: 08/26/2021] [Indexed: 05/15/2023]
Abstract
Many analytical challenges in biomedicine arise from the generally high heterogeneity and complexity of glycan- and glycoconjugate-containing samples, which are often only available in minute amounts. Therefore, highly sensitive workflows and detection methods are required. In this review mass spectrometric workflows and detection methods are evaluated for glycans and glycoproteins. Furthermore, glycomic methodologies and innovations that are tailored for enzymatic treatments, chemical derivatization, purification, separation, and detection at high sensitivity are highlighted. The discussion is focused on the analysis of mammalian N-linked and GalNAc-type O-linked glycans.
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Affiliation(s)
| | - Bernhard Kuster
- Chair for Proteomics and BioanalyticsTechnical University of MunichFreisingGermany
| | - Dietmar Reusch
- Pharma Technical Development EuropeRoche Diagnostics GmbHPenzbergGermany
| | - Manfred Wuhrer
- Leiden University Medical CenterCenter for Proteomics and MetabolomicsLeidenThe Netherlands
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3
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Chekol Abebe E, Tilahun Muche Z, Behaile T/Mariam A, Mengie Ayele T, Mekonnen Agidew M, Teshome Azezew M, Abebe Zewde E, Asmamaw Dejenie T, Asmamaw Mengstie M. The structure, biosynthesis, and biological roles of fetuin-A: A review. Front Cell Dev Biol 2022; 10:945287. [PMID: 35923855 PMCID: PMC9340150 DOI: 10.3389/fcell.2022.945287] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 06/28/2022] [Indexed: 11/21/2022] Open
Abstract
Fetuin-A is a heterodimeric plasma glycoprotein containing an A-chain of 282 amino acids and a B-chain of 27 amino acid residues linked by a single inter-disulfide bond. It is predominantly expressed in embryonic cells and adult hepatocytes, and to a lesser extent in adipocytes and monocytes. Fetuin-A binds with a plethora of receptors and exhibits multifaceted physiological and pathological functions. It is involved in the regulation of calcium metabolism, osteogenesis, and the insulin signaling pathway. It also acts as an ectopic calcification inhibitor, protease inhibitor, inflammatory mediator, anti-inflammatory partner, atherogenic factor, and adipogenic factor, among other several moonlighting functions. Fetuin-A has also been demonstrated to play a crucial role in the pathogenesis of several disorders. This review mainly focuses on the structure, synthesis, and biological roles of fetuin-A. Information was gathered manually from various journals via electronic searches using PubMed, Google Scholar, HINARI, and Cochrane Library from inception to 2022. Studies written in English and cohort, case-control, cross-sectional, or experimental studies were considered in the review, otherwise excluded.
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Affiliation(s)
- Endeshaw Chekol Abebe
- Department of Medical Biochemistry, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
- *Correspondence: Endeshaw Chekol Abebe,
| | - Zelalem Tilahun Muche
- Department of Physiology, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Awigchew Behaile T/Mariam
- Department of Medical Biochemistry, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Teklie Mengie Ayele
- Department of Pharmacy, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Melaku Mekonnen Agidew
- Department of Medical Biochemistry, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Muluken Teshome Azezew
- Department of Physiology, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Edgeit Abebe Zewde
- Department of Physiology, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Tadesse Asmamaw Dejenie
- Department of Medical Biochemistry, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
| | - Misganaw Asmamaw Mengstie
- Department of Medical Biochemistry, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
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4
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Kondo K, Harada Y, Nakano M, Suzuki T, Fukushige T, Hanzawa K, Yagi H, Takagi K, Mizuno K, Miyamoto Y, Taniguchi N, Kato K, Kanekura T, Dohmae N, Machida K, Maruyama I, Inoue H. Identification of distinct N-glycosylation patterns on extracellular vesicles from small-cell and non-small-cell lung cancer cells. J Biol Chem 2022; 298:101950. [PMID: 35447118 PMCID: PMC9117544 DOI: 10.1016/j.jbc.2022.101950] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 04/11/2022] [Accepted: 04/13/2022] [Indexed: 10/24/2022] Open
Abstract
Asparagine-linked glycosylation (N-glycosylation) of proteins in the cancer secretome has been gaining increasing attention as a potential biomarker for cancer detection and diagnosis. Small extracellular vesicles (sEVs) constitute a large part of the cancer secretome, yet little is known about whether their N-glycosylation status reflects known cancer characteristics. Here, we investigated the N-glycosylation of sEVs released from small-cell lung carcinoma (SCLC) and non-small-cell lung carcinoma (NSCLC) cells. We found that the N-glycans of SCLC-sEVs were characterized by the presence of structural units also found in the brain N-glycome, while NSCLC-sEVs were dominated by typical lung-type N-glycans with NSCLC-associated core fucosylation. In addition, lectin-assisted N-glycoproteomics of SCLC-sEVs and NSCLC-sEVs revealed that integrin αV was commonly expressed in sEVs of both cancer cell types, while the epithelium-specific integrin α6β4 heterodimer was selectively expressed in NSCLC-sEVs. Importantly, N-glycomics of the immuno-purified integrin α6 from NSCLC-sEVs identified NSCLC-type N-glycans on this integrin subunit. Thus, we conclude that protein N-glycosylation in lung cancer sEVs may potentially reflect the histology of lung cancers.
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Affiliation(s)
- Kiyotaka Kondo
- Department of Pulmonary Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan
| | - Yoichiro Harada
- Department of Glyco-Oncology and Medical Biochemistry, Osaka International Cancer Institute, 3-1-69 Otemae, Chuo-ku, Osaka 541-8567, Japan.
| | - Miyako Nakano
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashihiroshima 739-8530, Japan
| | - Takehiro Suzuki
- Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Tomoko Fukushige
- Department of Dermatology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Ken Hanzawa
- Departiment of Molecular Biology, Osaka International Cancer Institute, 3-1-69 Otemae, Chuo-ku, Osaka 541-8567, Japan
| | - Hirokazu Yagi
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Koichi Takagi
- Department of Pulmonary Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan
| | - Keiko Mizuno
- Department of Pulmonary Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan
| | - Yasuhide Miyamoto
- Departiment of Molecular Biology, Osaka International Cancer Institute, 3-1-69 Otemae, Chuo-ku, Osaka 541-8567, Japan
| | - Naoyuki Taniguchi
- Department of Glyco-Oncology and Medical Biochemistry, Osaka International Cancer Institute, 3-1-69 Otemae, Chuo-ku, Osaka 541-8567, Japan
| | - Koichi Kato
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan; Exploratory Research Center on Life and Living Systems (ExCELLS) and Institute for Molecular Science (IMS), National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan
| | - Takuro Kanekura
- Department of Dermatology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Naoshi Dohmae
- Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kentaro Machida
- Department of Pulmonary Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan
| | - Ikuro Maruyama
- Department of Systems Biology in Thromboregulation, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Hiromasa Inoue
- Department of Pulmonary Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan.
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5
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Saito T, Watanabe A, Nakano M, Matsuo K. MALDI-TOF mass spectrometry imaging for N-glycans on FFPE tissue sections of mouse NASH liver through Sialic acid Benzylamidation. Glycoconj J 2021; 38:167-175. [PMID: 33710478 DOI: 10.1007/s10719-021-09984-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/16/2021] [Accepted: 02/22/2021] [Indexed: 12/16/2022]
Abstract
Glycans play an important physiological role and are drawing attention as biomarkers that capture pathophysiological changes. Glycans can be detected by mass spectrometry, but recently matrix-assisted laser desorption/ionization- mass spectrometry imaging (MALDI-MSI) has enabled the visualization of glycans distribution on tissues. In this study, focusing on sialylated glycan (sialoglycans), we investigated the amidation reaction used to visualize glycans distribution, and developed a method of sialic acid derivatization by benzylamidation which is more sensitive than conventional amidation. Furthermore, we adapted this method for visualizing glycans in formalin-fixed paraffin-embedded (FFPE) liver tissue from normal mice and non-alcoholic steatohepatitis (NASH) model mice using MALDI-MSI. As a result, an increase in the distribution of glycan N-Acetylneuraminic acid-(NeuAc) ions was observed in the NASH mouse liver, and the change in glycan structure in the NASH model was clarified.
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Affiliation(s)
- Taiki Saito
- Analysis Division, Kaneka Techno Research Corporation, 1-8 Miyamae-cho Takasago-cho, Takasago City, Hyogo, 676-8688, Japan
| | - Akio Watanabe
- Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama Higashihiroshima, Hiroshima, 739-8530, Japan
| | - Miyako Nakano
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-3-1 Kagamiyama Higashihiroshima, Hiroshima, 739-8530, Japan
| | - Kazuhiko Matsuo
- Analysis Division, Kaneka Techno Research Corporation, 1-8 Miyamae-cho Takasago-cho, Takasago City, Hyogo, 676-8688, Japan.
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6
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Toward robust N-glycomics of various tissue samples that may contain glycans with unknown or unexpected structures. Sci Rep 2021; 11:6334. [PMID: 33737529 PMCID: PMC7973440 DOI: 10.1038/s41598-021-84668-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 02/16/2021] [Indexed: 12/13/2022] Open
Abstract
Glycans in tissues are structurally diverse and usually include a large number of isomers that cannot be easily distinguished by mass spectrometry (MS). To address this issue, we developed a combined method that can efficiently separate and identify glycan isomers. First, we separated 2-aminopyridine (PA)-derivatized N-glycans from chicken colon by reversed-phase liquid chromatography (LC) and directly analyzed them by electrospray ionization (ESI)-MS and MS/MS to obtain an overview of the structural features of tissue glycans. Next, we deduced the structures of isomers based on their elution positions, full MS, and MS/MS data, before or after digestions with several exoglycosidases. In this method, the elution position differed greatly depending on the core structure and branching pattern, allowing multiantennary N-glycan structures to be easily distinguished. To further determine linkages of branch sequences, we modified PA-N-glycans with sialic acid linkage-specific alkylamidation and/or permethylation, and analyzed the products by LC–MS and multistage MS. We determined the relative abundances of core structures, branching patterns, and branch sequences of N-glycans from chicken colon, and confirmed presence of characteristic branch sequences such as Lex, sialyl Lex, sulfated LacNAc, LacNAc repeat, and LacdiNAc. The results demonstrated that our method is useful for comparing N-glycomes among various tissue samples.
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7
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Pralow A, Cajic S, Alagesan K, Kolarich D, Rapp E. State-of-the-Art Glycomics Technologies in Glycobiotechnology. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2020; 175:379-411. [PMID: 33112988 DOI: 10.1007/10_2020_143] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Glycosylation affects the properties of biologics; thus regulatory bodies classified it as critical quality attribute and force biopharma industry to capture and control it throughout all phases, from R&D till end of product lifetime. The shift from originators to biosimilars further increases importance and extent of glycoanalysis, which thus increases the need for technology platforms enabling reliable high-throughput and in-depth glycan analysis. In this chapter, we will first summarize on established glycoanalytical methods based on liquid chromatography focusing on hydrophilic interaction chromatography, capillary electrophoresis focusing on multiplexed capillary gel electrophoresis, and mass spectrometry focusing on matrix-assisted laser desorption; we will then highlight two emerging technologies based on porous graphitized carbon liquid chromatography and on ion-mobility mass spectrometry as both are highly promising tools to deliver an additional level of information for in-depth glycan analysis; additionally we elaborate on the advantages and challenges of different glycoanalytical technologies and their complementarity; finally, we briefly review applications thereof to biopharmaceutical products. This chapter provides an overview of current state-of-the-art analytical approaches for glycan characterization of biopharmaceuticals that can be employed to capture glycoprotein heterogeneity in a biopharmaceutical context.
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Affiliation(s)
- Alexander Pralow
- Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Germany
| | - Samanta Cajic
- Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Germany
| | - Kathirvel Alagesan
- Institute for Glycomics, Griffith University, Gold Coast, QLD, Australia
| | - Daniel Kolarich
- Institute for Glycomics, Griffith University, Gold Coast, QLD, Australia
- ARC Centre of Excellence in Nanoscale Biophotonics, Griffith University, Gold Coast, QLD, Australia
| | - Erdmann Rapp
- Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Germany.
- glyXera GmbH, Magdeburg, Germany.
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8
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Harvey DJ. NEGATIVE ION MASS SPECTROMETRY FOR THE ANALYSIS OF N-LINKED GLYCANS. MASS SPECTROMETRY REVIEWS 2020; 39:586-679. [PMID: 32329121 DOI: 10.1002/mas.21622] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 12/13/2019] [Accepted: 12/22/2019] [Indexed: 05/03/2023]
Abstract
N-glycans from glycoproteins are complex, branched structures whose structural determination presents many analytical problems. Mass spectrometry, usually conducted in positive ion mode, often requires extensive sample manipulation, usually by derivatization such as permethylation, to provide the necessary structure-revealing fragment ions. The newer but, so far, lesser used negative ion techniques, on the contrary, provide a wealth of structural information not present in positive ion spectra that greatly simplify the analysis of these compounds and can usually be conducted without the need for derivatization. This review describes the use of negative ion mass spectrometry for the structural analysis of N-linked glycans and emphasises the many advantages that can be gained by this mode of operation. Biosynthesis and structures of the compounds are described followed by methods for release of the glycans from the protein. Methods for ionization are discussed with emphasis on matrix-assisted laser desorption/ionization (MALDI) and methods for producing negative ions from neutral compounds. Acidic glycans naturally give deprotonated species under most ionization conditions. Fragmentation of negative ions is discussed next with particular reference to those ions that are diagnostic for specific features such as the branching topology of the glycans and substitution positions of moieties such as fucose and sulfate, features that are often difficult to identify easily by conventional techniques such as positive ion fragmentation and exoglycosidase digestions. The advantages of negative over positive ions for this structural work are emphasised with an example of a series of glycans where all other methods failed to produce a structure. Fragmentation of derivatized glycans is discussed next, both with respect to derivatives at the reducing terminus of the molecules, and to methods for neutralization of the acidic groups on sialic acids to both stabilize them for MALDI analysis and to produce the diagnostic fragments seen with the neutral glycans. The use of ion mobility, combined with conventional mass spectrometry is described with emphasis on its use to extract clean glycan spectra both before and after fragmentation, to separate isomers and its use to extract additional information from separated fragment ions. A section on applications follows with examples of the identification of novel structures from lower organisms and tables listing the use of negative ions for structural identification of specific glycoproteins, glycans from viruses and uses in the biopharmaceutical industry and in medicine. The review concludes with a summary of the advantages and disadvantages of the technique. © 2020 John Wiley & Sons Ltd. Mass Spec Rev.
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Affiliation(s)
- David J Harvey
- Nuffield Department of Medicine, Target Discovery Institute, Roosevelt Drive, Oxford, OX3 7FZ, United Kingdom
- Centre for Biological Sciences, Faculty of Natural and Environmental Sciences, University of Southampton, Life Sciences Building 85, Highfield Campus, Southampton, SO17 1BJ, United Kingdom
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Abstract
Paucimannosidic N-glycans (PMGs) are special in that they only have the chitobiose core of two β-linked N-acetylglucosamines extended with up to three mannose residues and a core fucose. While such short-chain glycans are well described in plants, reports on their expression in humans have been rather scarce. Also, these glycans are often seen as a potential analytical artifact. Recently, it became clear that PMGs are abundantly expressed on various proteins from human neutrophils, opening up a new field of research into the potential biological roles of these modifications. Another niche where PMGs have repeatedly been described are human cancer tissues and cell lines. Chatterjee et al. build on these scattered reports by performing a large-scale pan-cancer investigation showing that PMGs are broadly expressed in different types of tumor tissues as well as related cell lines. Also, the related noncancerous control tissues likewise exhibit PMGs, albeit at lower levels than the corresponding tumors. In conclusion, this study establishes PMGs as a widely occurring modification of human proteins, and further studies are needed to elucidate the biosynthesis, function and tissue- as well as protein-associated expression of PMGs.
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Affiliation(s)
- Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Postbus 9600, 2300RC, Leiden, The Netherlands
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10
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Abstract
Glycosylation is a complex posttranslational modification that is critical for regulating the functions of diverse proteins. Analysis of protein glycosylation is made challenging by the high degree of heterogeneity in both glycan occupancy and structure. Here, we describe methods for data-independent acquisition (SWATH) mass spectrometry analysis of structure and occupancy of N-glycans from yeast cell wall glycoproteins.
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Affiliation(s)
- Lucía F Zacchi
- ARC Training Centre for Biopharmaceutical Innovation, The University of Queensland, St. Lucia, QLD, Australia
| | - Benjamin L Schulz
- ARC Training Centre for Biopharmaceutical Innovation, The University of Queensland, St. Lucia, QLD, Australia.
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD, Australia.
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Lin YH, Franc V, Heck AJR. Similar Albeit Not the Same: In-Depth Analysis of Proteoforms of Human Serum, Bovine Serum, and Recombinant Human Fetuin. J Proteome Res 2018; 17:2861-2869. [PMID: 29966421 PMCID: PMC6079914 DOI: 10.1021/acs.jproteome.8b00318] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Fetuin,
also known as alpha-2-Heremans Schmid glycoprotein (AHSG),
belongs to some of the most abundant glycoproteins secreted into the
bloodstream. In blood, fetuins exhibit functions as carriers of metals
and small molecules. Bovine fetuin, which harbors 3 N-glycosylation
sites and a suggested half dozen O-glycosylation sites, has been used
often as a model glycoprotein to test novel analytical workflows in
glycoproteomics. Here we characterize and compare fetuin in depth,
using protein from three different biological sources: human serum,
bovine serum, and recombinant human fetuin expressed in HEK-293 cells,
with the aim to elucidate similarities and differences between these
proteins and the post-translational modifications they harbor. Combining
data from high-resolution native mass spectrometry and glycopeptide
centric LC-MS analysis, we qualitatively and quantitatively gather
information on fetuin protein maturation, N-glycosylation, O-glycosylation,
and phosphorylation. We provide direct experimental evidence that
both the human serum and part of the recombinant proteins are processed
into two chains (A and B) connected by a single interchain disulfide
bridge, whereas bovine fetuin remains a single-chain protein. Although
two N-glycosylation sites, one O-glycosylation site, and a phosphorylation
site are conserved from bovine to human, the stoichiometry of the
modifications and the specific glycoforms they harbor are quite distinct.
Comparing serum and recombinant human fetuin, we observe that the
serum protein harbors a much simpler proteoform profile, indicating
that the recombinant protein is not ideally engineered to mimic human
serum fetuin. Comparing the proteoform profile and post-translational
modifications of human and bovine serum fetuin, we observe that, although
the gene structures of these two proteins are alike, they represent
quite distinct proteins when their glycoproteoform profile is also
taken into consideration.
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Affiliation(s)
- Yu-Hsien Lin
- Biomolecular Mass Spectrometry and Proteomics , Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht , Padualaan 8 , 3584 CH Utrecht , The Netherlands.,Netherlands Proteomics Center , Padualaan 8 , 3584 CH Utrecht , The Netherlands
| | - Vojtech Franc
- Biomolecular Mass Spectrometry and Proteomics , Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht , Padualaan 8 , 3584 CH Utrecht , The Netherlands.,Netherlands Proteomics Center , Padualaan 8 , 3584 CH Utrecht , The Netherlands
| | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics , Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht , Padualaan 8 , 3584 CH Utrecht , The Netherlands.,Netherlands Proteomics Center , Padualaan 8 , 3584 CH Utrecht , The Netherlands
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12
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Isomeric Separation and Characterisation of Glycoconjugates. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1104:77-99. [DOI: 10.1007/978-981-13-2158-0_5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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13
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Native glycan fragments detected by MALDI-FT-ICR mass spectrometry imaging impact gastric cancer biology and patient outcome. Oncotarget 2017; 8:68012-68025. [PMID: 28978092 PMCID: PMC5620232 DOI: 10.18632/oncotarget.19137] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 06/02/2017] [Indexed: 01/23/2023] Open
Abstract
Glycosylation in cancer is a highly dynamic process that has a significant impact on tumor biology. Further, the attachment of aberrant glycan forms is already considered a hallmark of the disease state. Mass spectrometry has become a prominent approach to analyzing glycoconjugates. Specifically, matrix-assisted laser desorption/ionisation -mass spectrometric imaging (MALDI-MSI) is a powerful technique that combines mass spectrometry with histology and enables the spatially resolved and label-free detection of glycans. The most common approach to the analysis of glycans is the use of mass spectrometry adjunct to PNGase F digestion and other chemical reactions. In the current study, we perform the analysis of formalin-fixed, paraffin-embedded (FFPE) tissues for natively occurring bioactive glycan fragments without prior digestion or chemical reactions using MALDI-FT-ICR-MSI. We examined 106 primary resected gastric cancer patient tissues in a tissue microarray and correlated native-occurring fragments with clinical endpoints, therapeutic targets such as epidermal growth factor receptor (EGFR) and HER2/neu expressions and the proliferation marker MIB1. The detection of a glycosaminoglycan fragment in tumor stroma regions was determined to be an independent prognostic factor for gastric cancer patients. Native glycan fragments were significantly linked to the expression of EGFR, HER2/neu and MIB1. In conclusion, we are the first to report the in situ detection of native-occurring bioactive glycan fragments in FFPE tissues that influence patient outcomes. These findings highlight the significance of glycan fragments in gastric cancer tumor biology and patient outcome.
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14
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Yang S, Höti N, Yang W, Liu Y, Chen L, Li S, Zhang H. Simultaneous analyses of N-linked and O-linked glycans of ovarian cancer cells using solid-phase chemoenzymatic method. Clin Proteomics 2017; 14:3. [PMID: 28100988 PMCID: PMC5237303 DOI: 10.1186/s12014-017-9137-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 12/29/2016] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Glycans play critical roles in a number of biological activities. Two common types of glycans, N-linked and O-linked, have been extensively analyzed in the last decades. N-glycans are typically released from glycoproteins by enzymes, while O-glycans are released from glycoproteins by chemical methods. It is important to identify and quantify both N- and O-linked glycans of glycoproteins to determine the changes of glycans. METHODS The effort has been dedicated to study glycans from ovarian cancer cells treated with O-linked glycosylation inhibitor qualitatively and quantitatively. We used a solid-phase chemoenzymatic approach to systematically identify and quantify N-glycans and O-glycans in the ovarian cancer cells. It consists of three steps: (1) immobilization of proteins from cells and derivatization of glycans to protect sialic acids; (2) release of N-glycans by PNGase F and quantification of N-glycans by isobaric tags; (3) release and quantification of O-glycans by β-elimination in the presence of 1-phenyl-3-methyl-5-pyrazolone (PMP). RESULTS We used ovarian cancer cell lines to study effect of O-linked glycosylation inhibitor on protein glycosylation. Results suggested that the inhibition of O-linked glycosylation reduced the levels of O-glycans. Interestingly, it appeared to increase N-glycan level in a lower dose of the O-linked glycosylation inhibitor. The sequential release and analyses of N-linked and O-linked glycans using chemoenzymatic approach are a platform for studying N-glycans and O-glycans in complex biological samples. CONCLUSION The solid-phase chemoenzymatic method was used to analyze both N-linked and O-linked glycans sequentially released from the ovarian cancer cells. The biological studies on O-linked glycosylation inhibition indicate the effects of O-glycosylation inhibition to glycan changes in both O-linked and N-linked glycan expression.
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Affiliation(s)
- Shuang Yang
- Department of Pathology, Johns Hopkins Medicine, Smith Bldg 4013, 400 N. Broadway, Baltimore, MD 21287 USA
| | - Naseruddin Höti
- Department of Pathology, Johns Hopkins Medicine, Smith Bldg 4013, 400 N. Broadway, Baltimore, MD 21287 USA
| | - Weiming Yang
- Department of Pathology, Johns Hopkins Medicine, Smith Bldg 4013, 400 N. Broadway, Baltimore, MD 21287 USA
| | - Yang Liu
- Department of Pathology, Johns Hopkins Medicine, Smith Bldg 4013, 400 N. Broadway, Baltimore, MD 21287 USA
| | - Lijun Chen
- Department of Pathology, Johns Hopkins Medicine, Smith Bldg 4013, 400 N. Broadway, Baltimore, MD 21287 USA
| | - Shuwei Li
- Institute for Bioscience and Biotechnology Research, University of Maryland College Park, Rockville, MD 20850 USA
| | - Hui Zhang
- Department of Pathology, Johns Hopkins Medicine, Smith Bldg 4013, 400 N. Broadway, Baltimore, MD 21287 USA
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15
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Everest-Dass AV, Kolarich D, Pascovici D, Packer NH. Blood group antigen expression is involved in C. albicans interaction with buccal epithelial cells. Glycoconj J 2016; 34:31-50. [PMID: 27639389 DOI: 10.1007/s10719-016-9726-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 08/03/2016] [Accepted: 08/10/2016] [Indexed: 12/15/2022]
Abstract
Human blood group polymorphisms are known to be determined by the expression of A, B or H antigens and the Lewis antigens. Protection against microbial infections has been associated with inheritance of polymorphisms in genes encoding and regulating the expression of ABH and Lewis antigens in bodily secretions and epithelial tissue surfaces, subsequently resulting in the presentation of different glycosylated terminal antigens on the cell surface. We investigated the role of blood group antigens in diversifying the glycosylation of buccal epithelial cells (BEC) that line the oral cavity. Specifically, we characterized and statistically evaluated the expression of histo-blood group (A, B, O) antigens on N-and O-linked glycans from BEC membrane proteins of various individuals that represented different blood group type and secretor status using a porous graphitic carbon liquid chromatography electrospray ionization mass spectrometry (PGC-LC-ESI-MS) based glycomics approach. From these BEC membrane proteins a total of 77 N-glycan and 96 O-glycan structures were structurally characterized from 19 individuals and relatively quantitated. The N-glycans from the secretor individuals did not express any A/B blood group determinants, but contained several terminal H-antigens. Apart from the non-secretors, the N-glycan profiles of BEC from all blood groups displayed similar glycan types, while varying in their relative intensities between individuals. However, multivariate analysis of the O-glycans from individuals displayed segregation patterns clearly associated with their blood group type and secretor status. In adhesion assays the oral pathogen Candida albicans showed a significantly higher interaction to blood group O type BECs relative to other blood groups.
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Affiliation(s)
- Arun V Everest-Dass
- Biomolecular Frontiers Research Centre, Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, Australia.,ARC Centre of Excellence in Nanoscale Biophotonics, Macquarie University, Sydney, Australia
| | - Daniel Kolarich
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, 14428, Potsdam, Germany
| | - Dana Pascovici
- Australian Proteome Analysis Facility (APAF), Macquarie University, Sydney, Australia
| | - Nicolle H Packer
- Biomolecular Frontiers Research Centre, Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, Australia. .,ARC Centre of Excellence in Nanoscale Biophotonics, Macquarie University, Sydney, Australia.
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16
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Gudelj I, Baciarello M, Ugrina I, De Gregori M, Napolioni V, Ingelmo PM, Bugada D, De Gregori S, Đerek L, Pučić-Baković M, Novokmet M, Gornik O, Saccani Jotti G, Meschi T, Lauc G, Allegri M. Changes in total plasma and serum N-glycome composition and patient-controlled analgesia after major abdominal surgery. Sci Rep 2016; 6:31234. [PMID: 27501865 PMCID: PMC4977520 DOI: 10.1038/srep31234] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 07/15/2016] [Indexed: 12/21/2022] Open
Abstract
Systemic inflammation participates to the complex healing process occurring after major surgery, thus directly affecting the surgical outcome and patient recovery. Total plasma N-glycome might be an indicator of inflammation after major surgery, as well as an anti-inflammatory therapy response marker, since protein glycosylation plays an essential role in the inflammatory cascade. Therefore, we assessed the effects of surgery on the total plasma N-glycome and the association with self-administration of postoperative morphine in two cohorts of patients that underwent major abdominal surgery. We found that plasma N-glycome undergoes significant changes one day after surgery and intensifies one day later, thus indicating a systemic physiological response. In particular, we observed the increase of bisialylated biantennary glycan, A2G2S[3,6]2, 12 hours after surgery, which progressively increased until 48 postoperative hours. Most changes occurred 24 hours after surgery with the decrease of most core-fucosylated biantennary structures, as well as the increase in sialylated tetraantennary and FA3G3S[3,3,3]3 structures. Moreover, we observed a progressive increase of sialylated triantennary and tetraantennary structures two days after surgery, with a concomitant decrease of the structures containing bisecting N-acetylglucosamine along with bi- and trisialylated triantennary glycans. We did not find any statistically significant association between morphine consumption and plasma N-glycome.
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Affiliation(s)
- Ivan Gudelj
- Genos Glycoscience Research Laboratory, Zagreb, Croatia
| | - Marco Baciarello
- Department of Anesthesia, ICU and Pain Therapy, University Hospital of Parma, Parma, Italy.,SIMPAR Group (Study in Multidisciplinary Pain Research), Parma, Italy.,Department of Surgical Sciences, University of Parma, Parma, Italy
| | - Ivo Ugrina
- Genos Glycoscience Research Laboratory, Zagreb, Croatia.,University of Zagreb Faculty of Pharmacy and Biochemistry, Zagreb, Croatia
| | - Manuela De Gregori
- SIMPAR Group (Study in Multidisciplinary Pain Research), Parma, Italy.,Pain Therapy Service, Fondazione IRCCS Policlinico S. Matteo, Pavia, Italy.,YAP (Young Against Pain) group, Parma, Italy
| | - Valerio Napolioni
- SIMPAR Group (Study in Multidisciplinary Pain Research), Parma, Italy.,Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Palo Alto, CA, USA
| | - Pablo M Ingelmo
- SIMPAR Group (Study in Multidisciplinary Pain Research), Parma, Italy.,Department of Anesthesia, Montreal Children's Hospital, Canada
| | - Dario Bugada
- Department of Anesthesia, ICU and Pain Therapy, University Hospital of Parma, Parma, Italy.,SIMPAR Group (Study in Multidisciplinary Pain Research), Parma, Italy.,Department of Surgical Sciences, University of Parma, Parma, Italy
| | - Simona De Gregori
- Clinical and Experimental Pharmacokinetics Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Lovorka Đerek
- Department of Medical Biochemistry and Laboratory Medicine, Clinical Hospital Merkur, Zagreb, Croatia
| | | | | | - Olga Gornik
- University of Zagreb Faculty of Pharmacy and Biochemistry, Zagreb, Croatia
| | - Gloria Saccani Jotti
- Department of Biomedical, Biotechnological and Translational Science (S.Bi.Bi.T.), University of Parma, Parma, Italy
| | - Tiziana Meschi
- Department of Clinical and Experimental Medicine, University of Parma, Italy
| | - Gordan Lauc
- Genos Glycoscience Research Laboratory, Zagreb, Croatia.,University of Zagreb Faculty of Pharmacy and Biochemistry, Zagreb, Croatia
| | - Massimo Allegri
- Department of Anesthesia, ICU and Pain Therapy, University Hospital of Parma, Parma, Italy.,SIMPAR Group (Study in Multidisciplinary Pain Research), Parma, Italy.,Department of Surgical Sciences, University of Parma, Parma, Italy
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17
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Takahashi S, Sugiyama T, Shimomura M, Kamada Y, Fujita K, Nonomura N, Miyoshi E, Nakano M. Site-specific and linkage analyses of fucosylated N-glycans on haptoglobin in sera of patients with various types of cancer: possible implication for the differential diagnosis of cancer. Glycoconj J 2016; 33:471-82. [PMID: 26869352 DOI: 10.1007/s10719-016-9653-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 01/22/2016] [Accepted: 01/27/2016] [Indexed: 01/28/2023]
Abstract
Fucosylation is an important type of glycosylation involved in cancer, and fucosylated proteins could be employed as cancer biomarkers. Previously, we reported that fucosylated N-glycans on haptoglobin in the sera of patients with pancreatic cancer were increased by lectin-ELISA and mass spectrometry analyses. However, an increase in fucosylated haptoglobin has been reported in various types of cancer. To ascertain if characteristic fucosylation is observed in each cancer type, we undertook site-specific analyses of N-glycans on haptoglobin in the sera of patients with five types of operable gastroenterological cancer (esophageal, gastric, colon, gallbladder, pancreatic), a non-gastroenterological cancer (prostate cancer) and normal controls using ODS column LC-ESI MS. Haptoglobin has four potential glycosylation sites (Asn184, Asn207, Asn211, Asn241). In all cancer samples, monofucosylated N-glycans were significantly increased at all glycosylation sites. Moreover, difucosylated N-glycans were detected at Asn 184, Asn207 and Asn241 only in cancer samples. Remarkable differences in N-glycan structure among cancer types were not observed. We next analyzed N-glycan alditols released from haptoglobin using graphitized carbon column LC-ESI MS to identify the linkage of fucosylation. Lewis-type and core-type fucosylated N-glycans were increased in gastroenterological cancer samples, but only core-type fucosylated N-glycan was relatively increased in prostate cancer samples. In metastatic prostate cancer, Lewis-type fucosylated N-glycan was also increased. These data suggest that the original tissue/cell producing fucosylated haptoglobin is different in each cancer type and linkage of fucosylation might be a clue of primary lesion, thereby enabling a differential diagnosis between gastroenterological cancers and non-gastroenterological cancers.
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Affiliation(s)
- Shiro Takahashi
- Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-hiroshima, 739-8530, Japan
| | - Taiki Sugiyama
- Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-hiroshima, 739-8530, Japan
| | - Mayuka Shimomura
- Department of Molecular Biochemistry & Clinical Investigation, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yoshihiro Kamada
- Department of Molecular Biochemistry & Clinical Investigation, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kazutoshi Fujita
- Department of Urology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Norio Nonomura
- Department of Urology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Eiji Miyoshi
- Department of Molecular Biochemistry & Clinical Investigation, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Miyako Nakano
- Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-hiroshima, 739-8530, Japan.
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18
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Clerc F, Reiding KR, Jansen BC, Kammeijer GSM, Bondt A, Wuhrer M. Human plasma protein N-glycosylation. Glycoconj J 2015; 33:309-43. [PMID: 26555091 PMCID: PMC4891372 DOI: 10.1007/s10719-015-9626-2] [Citation(s) in RCA: 293] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 09/30/2015] [Accepted: 10/05/2015] [Indexed: 01/09/2023]
Abstract
Glycosylation is the most abundant and complex protein modification, and can have a profound structural and functional effect on the conjugate. The oligosaccharide fraction is recognized to be involved in multiple biological processes, and to affect proteins physical properties, and has consequentially been labeled a critical quality attribute of biopharmaceuticals. Additionally, due to recent advances in analytical methods and analysis software, glycosylation is targeted in the search for disease biomarkers for early diagnosis and patient stratification. Biofluids such as saliva, serum or plasma are of great use in this regard, as they are easily accessible and can provide relevant glycosylation information. Thus, as the assessment of protein glycosylation is becoming a major element in clinical and biopharmaceutical research, this review aims to convey the current state of knowledge on the N-glycosylation of the major plasma glycoproteins alpha-1-acid glycoprotein, alpha-1-antitrypsin, alpha-1B-glycoprotein, alpha-2-HS-glycoprotein, alpha-2-macroglobulin, antithrombin-III, apolipoprotein B-100, apolipoprotein D, apolipoprotein F, beta-2-glycoprotein 1, ceruloplasmin, fibrinogen, immunoglobulin (Ig) A, IgG, IgM, haptoglobin, hemopexin, histidine-rich glycoprotein, kininogen-1, serotransferrin, vitronectin, and zinc-alpha-2-glycoprotein. In addition, the less abundant immunoglobulins D and E are included because of their major relevance in immunology and biopharmaceutical research. Where available, the glycosylation is described in a site-specific manner. In the discussion, we put the glycosylation of individual proteins into perspective and speculate how the individual proteins may contribute to a total plasma N-glycosylation profile determined at the released glycan level.
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Affiliation(s)
- Florent Clerc
- Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands
| | - Karli R Reiding
- Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands
| | - Bas C Jansen
- Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands
| | - Guinevere S M Kammeijer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands
| | - Albert Bondt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands.,Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands. .,Division of BioAnalytical Chemistry, VU University Amsterdam, Amsterdam, The Netherlands.
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19
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Yang S, Rubin A, Eshghi ST, Zhang H. Chemoenzymatic method for glycomics: Isolation, identification, and quantitation. Proteomics 2015; 16:241-56. [PMID: 26390280 DOI: 10.1002/pmic.201500266] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/15/2015] [Accepted: 09/15/2015] [Indexed: 01/03/2023]
Abstract
Over the past decade, considerable progress has been made with respect to the analytical methods for analysis of glycans from biological sources. Regardless of the specific methods that are used, glycan analysis includes isolation, identification, and quantitation. Derivatization is indispensable to increase their identification. Derivatization of glycans can be performed by permethylation or carbodiimide coupling/esterification. By introducing a fluorophore or chromophore at their reducing end, glycans can be separated by electrophoresis or chromatography. The fluorogenically labeled glycans can be quantitated using fluorescent detection. The recently developed approaches using solid-phase such as glycoprotein immobilization for glycan extraction and on-tissue glycan mass spectrometry imaging demonstrate advantages over methods performed in solution. Derivatization of sialic acids is favorably implemented on the solid support using carbodiimide coupling, and the released glycans can be further modified at the reducing end or permethylated for quantitative analysis. In this review, methods for glycan isolation, identification, and quantitation are discussed.
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Affiliation(s)
- Shuang Yang
- Department of Pathology, Johns Hopkins University, Baltimore, USA
| | - Abigail Rubin
- Department of Pathology, Johns Hopkins University, Baltimore, USA
| | | | - Hui Zhang
- Department of Pathology, Johns Hopkins University, Baltimore, USA
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20
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Vitiazeva V, Kattla JJ, Flowers SA, Lindén SK, Premaratne P, Weijdegård B, Sundfeldt K, Karlsson NG. The O-Linked Glycome and Blood Group Antigens ABO on Mucin-Type Glycoproteins in Mucinous and Serous Epithelial Ovarian Tumors. PLoS One 2015; 10:e0130197. [PMID: 26075384 PMCID: PMC4468167 DOI: 10.1371/journal.pone.0130197] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 05/16/2015] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Mucins are heavily O-glycosylated proteins where the glycosylation has been shown to play an important role in cancer. Normal epithelial ovarian cells do not express secreted mucins, but their abnormal expression has previously been described in epithelial ovarian cancer and may relate to tumor formation and progression. The cyst fluids were shown to be a rich source for acidic glycoproteins. The study of these proteins can potentially lead to the identification of more effective biomarkers for ovarian cancer. METHODS In this study, we analyzed the expression of the MUC5AC and the O-glycosylation of acidic glycoproteins secreted into ovarian cyst fluids. The samples were obtained from patients with serous and mucinous ovarian tumors of different stages (benign, borderline, malignant) and grades. The O-linked oligosaccharides were released and analyzed by negative-ion graphitized carbon Liquid Chromatography (LC) coupled to Electrospray Ionization tandem Mass Spectrometry (ESI-MSn). The LC-ESI-MSn of the oligosaccharides from ovarian cyst fluids displayed differences in expression of fucose containing structures such as blood group ABO antigens and Lewis-type epitopes. RESULTS The obtained data showed that serous and mucinous benign adenomas, mucinous low malignant potential carcinomas (LMPs, borderline) and mucinous low-grade carcinomas have a high level of blood groups and Lewis type epitopes. In contrast, this type of fucosylated structures were low abundant in the high-grade mucinous carcinomas or in serous carcinomas. In addition, the ovarian tumors that showed a high level of expression of blood group antigens also revealed a strong reactivity towards the MUC5AC antibody. To visualize the differences between serous and mucinous ovarian tumors based on the O-glycosylation, a hierarchical cluster analysis was performed using mass spectrometry average compositions (MSAC). CONCLUSION Mucinous benign and LMPs along with mucinous low-grade carcinomas appear to be different from serous and high-grade mucinous carcinomas based on their O-glycan profiles.
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Affiliation(s)
- Varvara Vitiazeva
- Department of Medical Biochemistry, University of Gothenburg, Gothenburg, Sweden
- * E-mail:
| | - Jayesh J. Kattla
- Department of Medical Biochemistry, University of Gothenburg, Gothenburg, Sweden
| | - Sarah A. Flowers
- Department of Medical Biochemistry, University of Gothenburg, Gothenburg, Sweden
| | - Sara K. Lindén
- Department of Medical Biochemistry, University of Gothenburg, Gothenburg, Sweden
| | - Pushpa Premaratne
- Department of Medical Biochemistry, University of Gothenburg, Gothenburg, Sweden
| | - Birgitta Weijdegård
- Department of Obstetrics and Gynecology, Institute of Clinical Sciences, Sahlgrenska Cancer Center, University of Gothenburg, Gothenburg, Sweden
| | - Karin Sundfeldt
- Department of Obstetrics and Gynecology, Institute of Clinical Sciences, Sahlgrenska Cancer Center, University of Gothenburg, Gothenburg, Sweden
| | - Niclas G. Karlsson
- Department of Medical Biochemistry, University of Gothenburg, Gothenburg, Sweden
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21
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Xu Y, Bailey UM, Schulz BL. Automated measurement of site-specific N
-glycosylation occupancy with SWATH-MS. Proteomics 2015; 15:2177-86. [DOI: 10.1002/pmic.201400465] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 01/08/2015] [Accepted: 02/27/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Ying Xu
- School of Chemistry and Molecular Biosciences; The University of Queensland; Brisbane Queensland Australia
| | - Ulla-Maja Bailey
- School of Chemistry and Molecular Biosciences; The University of Queensland; Brisbane Queensland Australia
| | - Benjamin L. Schulz
- School of Chemistry and Molecular Biosciences; The University of Queensland; Brisbane Queensland Australia
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22
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Weiz S, Kamalakumar A, Biskup K, Blanchard V. Enhanced detection of in-gel releasedN-glycans by MALDI-TOF-MS. Proteomics 2015; 15:1503-7. [DOI: 10.1002/pmic.201400210] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 10/17/2014] [Accepted: 12/15/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Stefan Weiz
- Institute of Laboratory Medicine; Clinical Chemistry, and Pathobiochemistry; Charité Medical University; Berlin Germany
- Department of Biology; Chemistry and Pharmacy, Freie Universität Berlin; Berlin Germany
| | - Aryaline Kamalakumar
- Institute of Laboratory Medicine; Clinical Chemistry, and Pathobiochemistry; Charité Medical University; Berlin Germany
- Department of Biology; Chemistry and Pharmacy, Freie Universität Berlin; Berlin Germany
| | - Karina Biskup
- Institute of Laboratory Medicine; Clinical Chemistry, and Pathobiochemistry; Charité Medical University; Berlin Germany
- Department of Biology; Chemistry and Pharmacy, Freie Universität Berlin; Berlin Germany
| | - Véronique Blanchard
- Institute of Laboratory Medicine; Clinical Chemistry, and Pathobiochemistry; Charité Medical University; Berlin Germany
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23
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Nguyen-Khuong T, Everest-Dass AV, Kautto L, Zhao Z, Willcox MDP, Packer NH. Glycomic characterization of basal tears and changes with diabetes and diabetic retinopathy. Glycobiology 2014; 25:269-83. [PMID: 25303961 DOI: 10.1093/glycob/cwu108] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
As a secreted fluid, the state of tear glycosylation is particularly important in the role of immunity of the ocular surface. Tears are a valuable source of non-invasive biomarkers for disease and there are continued efforts to characterize their components thoroughly. In this study, a small volume of basal tears (5 μL) was collected from healthy controls, patients with diabetes without retinopathy and patients with diabetes and retinopathy. The detailed N- and O-linked tear protein glycome was characterized and the relative abundance of each structure determined. Of the 50 N-linked glycans found, 89% were complex with 50% containing a bisecting N-acetylglucosamine, 65% containing a core fucose whilst 33% were sialylated. Of the 8 O-linked glycans detected, 3 were of cores 1 and 5 of core 2 type, with a majority of them being sialylated (90%). Additionally, these glycan structures were profiled across the three diabetic disease groups. Whilst the higher abundant structures did not alter across the three groups, only five low abundance N-linked glycans and 1 O-linked glycan did alter with the onset of diabetes mellitus and diabetic retinopathy (DR). These results suggest the conservation of glycan types on basal tear proteins between individuals and point to only small changes in glycan expression on the proteins in tears with the development of diabetes and DR.
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Affiliation(s)
- Terry Nguyen-Khuong
- Biomolecular Frontiers Research Centre, Department of Chemistry and Biomolecular Sciences, Faculty of Science, Macquarie University, Building E8C Room 307, Sydney, NSW 2109, Australia
| | - Arun V Everest-Dass
- Biomolecular Frontiers Research Centre, Department of Chemistry and Biomolecular Sciences, Faculty of Science, Macquarie University, Building E8C Room 307, Sydney, NSW 2109, Australia
| | - Liisa Kautto
- Biomolecular Frontiers Research Centre, Department of Chemistry and Biomolecular Sciences, Faculty of Science, Macquarie University, Building E8C Room 307, Sydney, NSW 2109, Australia
| | - Zhenjun Zhao
- School of Optometry and Vision Science, University of New South Wales, Sydney, NSW, Australia
| | - Mark D P Willcox
- School of Optometry and Vision Science, University of New South Wales, Sydney, NSW, Australia
| | - Nicolle H Packer
- Biomolecular Frontiers Research Centre, Department of Chemistry and Biomolecular Sciences, Faculty of Science, Macquarie University, Building E8C Room 307, Sydney, NSW 2109, Australia
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24
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Xu Y, Bailey UM, Punyadeera C, Schulz BL. Identification of salivary N-glycoproteins and measurement of glycosylation site occupancy by boronate glycoprotein enrichment and liquid chromatography/electrospray ionization tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2014; 28:471-482. [PMID: 24497285 DOI: 10.1002/rcm.6806] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 12/08/2013] [Accepted: 12/10/2013] [Indexed: 06/03/2023]
Abstract
RATIONALE Diseases including cancer and congenital disorders of glycosylation have been associated with changes in the site-specific extent of protein glycosylation. Saliva can be non-invasively sampled and is rich in glycoproteins, giving it the potential to be a useful biofluid for the discovery and detection of disease biomarkers associated with changes in glycosylation. METHODS Saliva was collected from healthy individuals and glycoproteins were enriched using phenylboronic acid based glycoprotein enrichment resin. Proteins were deglycosylated with peptide-N-glycosidase F and digested with AspN or trypsin. Desalted peptides and deglycosylated peptides were separated by reversed-phase liquid chromatography and detected with on-line electrospray ionization quadrupole-time-of-flight mass spectrometry using a 5600 TripleTof instrument. Site-specific glycosylation occupancy was semi-quantitatively determined from the abundance of deglycosylated and nonglycosylated versions of each given peptide. RESULTS Glycoprotein enrichment identified 67 independent glycosylation sites from 24 unique proteins, a 3.9-fold increase in the number of glycosylation sites identified. Enrichment of glycoproteins rather than glycopeptides allowed detection of both deglycosylated and nonglycosylated versions of each peptide, and thereby robust measurement of site-specific occupancy at 21 asparagines. Healthy individuals showed limited biological variability in occupancy, with partially modified sites having characteristics consistent with inefficient glycosylation by oligosaccharyltransferase. Inclusion of negative controls without enzymatic deglycosylation controlled for spontaneous chemical deamidation, and identified asparagines previously incorrectly annotated as glycosylated. CONCLUSIONS We developed a sample preparation and mass spectrometry detection strategy for rapid and efficient measurement of site-specific glycosylation occupancy on diverse salivary glycoproteins suitable for biomarker discovery and detection of changes in glycosylation occupancy in human disease.
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Affiliation(s)
- Ying Xu
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia
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25
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Abstract
Proteomics has rapidly become an important tool for life science research, allowing the integrated analysis of global protein expression from a single experiment. To accommodate the complexity and dynamic nature of any proteome, researchers must use a combination of disparate protein biochemistry techniques, often a highly involved and time-consuming process. Whilst highly sophisticated, individual technologies for each step in studying a proteome are available, true high-throughput proteomics that provides a high degree of reproducibility and sensitivity has been difficult to achieve. The development of high-throughput proteomic platforms, encompassing all aspects of proteome analysis and integrated with genomics and bioinformatics technology, therefore represents a crucial step for the advancement of proteomics research. ProteomIQ (Proteome Systems) is the first fully integrated, start-to-finish proteomics platform to enter the market. Sample preparation and tracking, centralized data acquisition and instrument control, and direct interfacing with genomics and bioinformatics databases are combined into a single suite of integrated hardware and software tools, facilitating high reproducibility and rapid turnaround times. This review will highlight some features of ProteomIQ, with particular emphasis on the analysis of proteins separated by 2D polyacrylamide gel electrophoresis.
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Affiliation(s)
- Andrew N Stephens
- University of Sydney, Department of Molecular & Microbial Biosciences, NSW, Australia.
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26
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McCarthy C, Saldova R, O'Brien ME, Bergin DA, Carroll TP, Keenan J, Meleady P, Henry M, Clynes M, Rudd PM, Reeves EP, McElvaney NG. Increased outer arm and core fucose residues on the N-glycans of mutated alpha-1 antitrypsin protein from alpha-1 antitrypsin deficient individuals. J Proteome Res 2013; 13:596-605. [PMID: 24328305 DOI: 10.1021/pr400752t] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Alpha-1 antitrypsin (AAT) is the major physiological inhibitor of a range of serine proteases, and in the lung, it maintains a protease-antiprotease balance. AAT deficiency (AATD) is an autosomal co-dominant condition with the Z mutation being the most common cause. Individuals homozygous for Z (PiZZ) have low levels of circulating mutant Z-AAT protein leading to premature emphysematous lung disease. Extensive glycoanalysis has been performed on normal AAT (M-AAT) from healthy individuals and the importance of glycosylation in affecting the immune modulatory roles of AAT is documented. However, no glycoanalysis has been carried out on Z-AAT from deficient individuals to date. In this study, we investigate whether the glycans present on Z-AAT differ to those found on M-AAT from healthy controls. Plasma AAT was purified from 10 individuals: 5 AATD donors with the PiZZ phenotype and 5 PiMM healthy controls. Glycoanalysis was performed employing N-glycan release, exoglycosidase digestion and UPLC analysis. No difference in branched glycans was identified between AATD and healthy controls. However, a significant increase in both outer arm (α1-3) (p = 0.04) and core (α1-6) fucosylated glycans (p < 0.0001) was found on Z-AAT compared to M-AAT. This study has identified increased fucosylation on N-glycans of Z-AAT indicative of ongoing inflammation in AATD individuals with implications for early therapeutic intervention.
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Affiliation(s)
- Cormac McCarthy
- Respiratory Research Division, Royal College of Surgeons in Ireland , Beaumont Hospital, Dublin 9, Ireland
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Nakajima K, Ito E, Ohtsubo K, Shirato K, Takamiya R, Kitazume S, Angata T, Taniguchi N. Mass isotopomer analysis of metabolically labeled nucleotide sugars and N- and O-glycans for tracing nucleotide sugar metabolisms. Mol Cell Proteomics 2013; 12:2468-80. [PMID: 23720760 PMCID: PMC3769324 DOI: 10.1074/mcp.m112.027151] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Revised: 05/20/2013] [Indexed: 12/14/2022] Open
Abstract
Nucleotide sugars are the donor substrates of various glycosyltransferases, and an important building block in N- and O-glycan biosynthesis. Their intercellular concentrations are regulated by cellular metabolic states including diseases such as cancer and diabetes. To investigate the fate of UDP-GlcNAc, we developed a tracing method for UDP-GlcNAc synthesis and use, and GlcNAc utilization using (13)C6-glucose and (13)C2-glucosamine, respectively, followed by the analysis of mass isotopomers using LC-MS. Metabolic labeling of cultured cells with (13)C6-glucose and the analysis of isotopomers of UDP-HexNAc (UDP-GlcNAc plus UDP-GalNAc) and CMP-NeuAc revealed the relative contributions of metabolic pathways leading to UDP-GlcNAc synthesis and use. In pancreatic insulinoma cells, the labeling efficiency of a (13)C6-glucose motif in CMP-NeuAc was lower compared with that in hepatoma cells. Using (13)C2-glucosamine, the diversity of the labeling efficiency was observed in each sugar residue of N- and O-glycans on the basis of isotopomer analysis. In the insulinoma cells, the low labeling efficiencies were found for sialic acids as well as tri- and tetra-sialo N-glycans, whereas asialo N-glycans were found to be abundant. Essentially no significant difference in secreted hyaluronic acids was found among hepatoma and insulinoma cell lines. This indicates that metabolic flows are responsible for the low sialylation in the insulinoma cells. Our strategy should be useful for systematically tracing each stage of cellular GlcNAc metabolism.
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Affiliation(s)
- Kazuki Nakajima
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Emi Ito
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kazuaki Ohtsubo
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Ken Shirato
- §Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima Tokorozawa, Saitama 359-1192, Japan
| | - Rina Takamiya
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Shinobu Kitazume
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Takashi Angata
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Naoyuki Taniguchi
- From the ‡Disease Glycomics Team, Systems Glycobiology Research Group, Global Research Cluster, RIKEN Max Plank Joint Research Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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28
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Costa AR, Rodrigues ME, Henriques M, Oliveira R, Azeredo J. Glycosylation: impact, control and improvement during therapeutic protein production. Crit Rev Biotechnol 2013; 34:281-99. [PMID: 23919242 DOI: 10.3109/07388551.2013.793649] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The emergence of the biopharmaceutical industry represented a major revolution for modern medicine, through the development of recombinant therapeutic proteins that brought new hope for many patients with previously untreatable diseases. There is a ever-growing demand for these therapeutics that forces a constant technological evolution to increase product yields while simultaneously reducing costs. However, the process changes made for this purpose may also affect the quality of the product, a factor that was initially overlooked but which is now a major focus of concern. Of the many properties determining product quality, glycosylation is regarded as one of the most important, influencing, for example, the biological activity, serum half-life and immunogenicity of the protein. Consequently, monitoring and control of glycosylation is now critical in biopharmaceutical manufacturing and a requirement of regulatory agencies. A rapid evolution is being observed in this context, concerning the influence of glycosylation in the efficacy of different therapeutic proteins, the impact on glycosylation of a diversity of parameters/processes involved in therapeutic protein production, the analytical methodologies employed for glycosylation monitoring and control, as well as strategies that are being explored to use this property to improve therapeutic protein efficacy (glycoengineering). This work reviews the main findings on these subjects, providing an up-to-date source of information to support further studies.
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Affiliation(s)
- Ana Rita Costa
- IBB - Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar , Braga , Portugal
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29
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Dong W, Matsuno YK, Kameyama A. Serum protein fractionation using supported molecular matrix electrophoresis. Electrophoresis 2013; 34:2432-9. [DOI: 10.1002/elps.201300154] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 04/24/2013] [Accepted: 04/29/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Weijie Dong
- Bioproduction Research Institute; National Institute of Advanced Industrial Science and Technology (AIST); Open Space Laboratory C-2; Tsukuba; Ibaraki; Japan
| | - Yu-ki Matsuno
- Bioproduction Research Institute; National Institute of Advanced Industrial Science and Technology (AIST); Open Space Laboratory C-2; Tsukuba; Ibaraki; Japan
| | - Akihiko Kameyama
- Bioproduction Research Institute; National Institute of Advanced Industrial Science and Technology (AIST); Open Space Laboratory C-2; Tsukuba; Ibaraki; Japan
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30
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Novotny MV, Alley WR. Recent trends in analytical and structural glycobiology. Curr Opin Chem Biol 2013; 17:832-40. [PMID: 23790311 DOI: 10.1016/j.cbpa.2013.05.029] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 05/24/2013] [Indexed: 12/22/2022]
Abstract
The great complexity of glycosylated biomolecules necessitates a set of powerful analytical methodologies to reveal functionally important structural features. Mass spectrometry (MS), with its different ionization techniques, mass analyzers, and detection strategies, has become the most important analytical method in glycomic and glycoproteomic investigations. In combination with MS, microscale separations (based on capillary chromatography and electrophoresis) and carbohydrate microchemistry, we feature here conceptually important applications of the recent years. This review focuses on methodological advances pertaining to disease biomarker research, immunology, developmental biology, and measurements of importance to biopharmaceuticals. High-sensitivity determinations and sample enrichment/preconcentration are particularly emphasized in glycomic and glycoproteomic profiling.
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Affiliation(s)
- Milos V Novotny
- Department of Chemistry, Indiana University, Bloomington, IN 47405, United States.
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31
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Palmieri G, Balestrieri M, Peter-Katalinić J, Pohlentz G, Rossi M, Fiume I, Pocsfalvi G. Surface-exposed glycoproteins of hyperthermophilic Sulfolobus solfataricus P2 show a common N-glycosylation profile. J Proteome Res 2013; 12:2779-90. [PMID: 23586857 DOI: 10.1021/pr400123z] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cell surface proteins of hyperthermophilic Archaea actively participate in intercellular communication, cellular uptake, and energy conversion to sustain survival strategies in extreme habitats. Surface (S)-layer glycoproteins, the major component of the S-layers in many archaeal species and the best-characterized prokaryotic glycoproteins, were shown to have a large structural diversity in their glycan compositions. In spite of this, knowledge on glycosylation of proteins other than S-layer proteins in Archaea is quite limited. Here, the N-glycosylation pattern of cell-surface-exposed proteins of Sulfolobus solfataricus P2 were analyzed by lectin affinity purification, HPAEC-PAD, and multiple mass spectrometry-based techniques. Detailed analysis of SSO1273, one of the most abundant ABC transporters present in the cell surface fraction of S. solfataricus, revealed a novel glycan structure composed of a branched sulfated heptasaccharide, Hex4(GlcNAc)2 plus sulfoquinovose where Hex is d-mannose and d-glucose. Having one monosaccharide unit more than the glycan of the S-layer glycoprotein of S. acidocaldarius, this is the most complex archaeal glycan structure known today. SSO1273 protein is heavily glycosylated and all 20 theoretical N-X-S/T (where X is any amino acid except proline) consensus sequence sites were confirmed. Remarkably, we show that several other proteins in the surface fraction of S. solfataricus are N-glycosylated by the same sulfated oligosaccharide and we identified 56 N-glycosylation sites in this subproteome.
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Affiliation(s)
- Gianna Palmieri
- Institute of Protein Biochemistry, National Research Council of Italy, Napoli, Italy
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32
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Alley WR, Mann BF, Novotny MV. High-sensitivity analytical approaches for the structural characterization of glycoproteins. Chem Rev 2013; 113:2668-732. [PMID: 23531120 PMCID: PMC3992972 DOI: 10.1021/cr3003714] [Citation(s) in RCA: 239] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- William R. Alley
- Department of Chemistry, Indiana University, Bloomington, Indiana, United States
- National Center for Glycomics and Glycoproteomics, Indiana University, Bloomington, Indiana, United States
| | - Benjamin F. Mann
- Department of Chemistry, Indiana University, Bloomington, Indiana, United States
- National Center for Glycomics and Glycoproteomics, Indiana University, Bloomington, Indiana, United States
| | - Milos V. Novotny
- Department of Chemistry, Indiana University, Bloomington, Indiana, United States
- National Center for Glycomics and Glycoproteomics, Indiana University, Bloomington, Indiana, United States
- Indiana University School of Medicine, Indiana University, Indianapolis, Indiana, United States
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33
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Miyauchi S, Te'o VS, Bergquist PL, Nevalainen KMH. Expression of a bacterial xylanase in Trichoderma reesei under the egl2 and cbh2 glycosyl hydrolase gene promoters. N Biotechnol 2013; 30:523-30. [PMID: 23467195 DOI: 10.1016/j.nbt.2013.02.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Revised: 02/24/2013] [Accepted: 02/25/2013] [Indexed: 11/17/2022]
Abstract
Expression vectors were constructed for Trichoderma reesei using the promoters, secretion signals and the modular structure of the efficiently expressed and secreted cellulase enzymes EGL2 (Cel5A) and CBH2 (Cel6A) as a prelude to establishing a platform where a gene of interest can be expressed under several promoters simultaneously. The designs featured (i) EGL2sigpro (egl2 promoter and secretion signal), (ii) EGL2cbmlin (egl2 promoter, secretion signal, EGL2 cellulose binding module and linker), (iii) CBH2sigpro (cbh2 promoter and secretion signal) and (iv) CBH2cbmlin (cbh2 promoter, secretion signal, CBH2 cellulose binding module and linker). Recombinant vectors were introduced individually into the high protein-secreting T. reesei RUT-C30 strain to generate single-promoter transformants expressing the Dictyoglomus thermophilum xynB gene that encodes a thermophilic xylanase enzyme (XynB). Ten transformants producing XynB representing each of the four different types of vectors were selected for further testing and the highest XynB production was achieved from a transformant containing 1-2copies of the EGL2cbmlin vector. Best xylanase producers did not show any particular pattern in terms of the number of gene copies and their mode of integration into the chromosomal DNA. Transformants generated with the cbmlin-type vectors produced multiple forms of XynB which were decorated with various N- and O-glycans. One of the O-glycans was identified as hexuronic acid, whose presence had not been observed previously in the glycosylation patterns of T. reesei.
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Affiliation(s)
- Shingo Miyauchi
- Department of Chemistry and Biomolecular Sciences, Macquarie University, NSW 2109, Australia
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34
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Bailey UM, Schulz BL. Deglycosylation systematically improves N-glycoprotein identification in liquid chromatography-tandem mass spectrometry proteomics for analysis of cell wall stress responses in Saccharomyces cerevisiae lacking Alg3p. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 923-924:16-21. [PMID: 23454304 DOI: 10.1016/j.jchromb.2013.01.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 01/15/2013] [Accepted: 01/19/2013] [Indexed: 12/15/2022]
Abstract
Post-translational modification of proteins with glycosylation is of key importance in many biological systems in eukaryotes, influencing fundamental biological processes and regulating protein function. Changes in glycosylation are therefore of interest in understanding these processes and are also useful as clinical biomarkers of disease. The presence of glycosylation can also inhibit protease digestion and lower the quality and confidence of protein identification by mass spectrometry. While deglycosylation can improve the efficiency of subsequent protease digest and increase protein coverage, this step is often excluded from proteomic workflows. Here, we performed a systematic analysis that showed that deglycosylation with peptide-N-glycosidase F (PNGase F) prior to protease digestion with AspN or trypsin improved the quality of identification of the yeast cell wall proteome. The improvement in the confidence of identification of glycoproteins following PNGase F deglycosylation correlated with a higher density of glycosylation sites. Optimal identification across the proteome was achieved with PNGase F deglycosylation and complementary proteolysis with either AspN or trypsin. We used this combination of deglycosylation and complementary protease digest to identify changes in the yeast cell wall proteome caused by lack of the Alg3p protein, a key component of the biosynthetic pathway of protein N-glycosylation. The cell wall of yeast lacking Alg3p showed specifically increased levels of Cis3p, a protein important for cell wall integrity. Our results showed that deglycosylation prior to protease digestion improved the quality of proteomic analyses even if protein glycosylation is not of direct relevance to the study at hand.
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Affiliation(s)
- Ulla-Maja Bailey
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
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35
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Production of α-L-iduronidase in maize for the potential treatment of a human lysosomal storage disease. Nat Commun 2013; 3:1062. [PMID: 22990858 DOI: 10.1038/ncomms2070] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Accepted: 08/16/2012] [Indexed: 02/03/2023] Open
Abstract
Lysosomal storage diseases are a class of over 70 rare genetic diseases that are amenable to enzyme replacement therapy. Towards developing a plant-based enzyme replacement therapeutic for the lysosomal storage disease mucopolysaccharidosis I, here we expressed α-L-iduronidase in the endosperm of maize seeds by a previously uncharacterized mRNA-targeting-based mechanism. Immunolocalization, cellular fractionation and in situ RT-PCR demonstrate that the α-L-iduronidase protein and mRNA are targeted to endoplasmic reticulum (ER)-derived protein bodies and to protein body-ER regions, respectively, using regulatory (5'- and 3'-UTR) and signal-peptide coding sequences from the γ-zein gene. The maize α-L-iduronidase exhibits high activity, contains high-mannose N-glycans and is amenable to in vitro phosphorylation. This mRNA-based strategy is of widespread importance as plant N-glycan maturation is controlled and the therapeutic protein is generated in a native form. For our target enzyme, the N-glycan structures are appropriate for downstream processing, a prerequisite for its potential as a therapeutic protein.
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36
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Thaysen-Andersen M, Larsen MR, Packer NH, Palmisano G. Structural analysis of glycoprotein sialylation – Part I: pre-LC-MS analytical strategies. RSC Adv 2013. [DOI: 10.1039/c3ra42960a] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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37
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Wongtrakul-Kish K, Kolarich D, Pascovici D, Joss JL, Deane E, Packer NH. Characterization of N- and O-linked glycosylation changes in milk of the tammar wallaby (Macropus eugenii) over lactation. Glycoconj J 2012; 30:523-36. [DOI: 10.1007/s10719-012-9452-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 09/06/2012] [Accepted: 09/11/2012] [Indexed: 02/02/2023]
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38
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Everest-Dass AV, Jin D, Thaysen-Andersen M, Nevalainen H, Kolarich D, Packer NH. Comparative structural analysis of the glycosylation of salivary and buccal cell proteins: innate protection against infection by Candida albicans. Glycobiology 2012; 22:1465-79. [DOI: 10.1093/glycob/cws112] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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40
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Abstract
The glycome, that is, the glycan components of a biological source, has been widely reported to change with disease states. However, mining the glycome for biomarkers is complicated by glycan structural heterogeneity. Nanoflow LC, or nano-LC, significantly addresses the problem by providing a highly sensitive and quantitative method of separating and profiling glycans. This review summarizes recent advances in analytical technology and methodology that enhance and augment the advantages offered by nano-LC. (e.g., reversed phase, hydrophilic interaction and porous graphitized carbon chromatography, as well as associated derivatization strategies), detectors (e.g., fluorescence and MS), and technology platforms (particularly chip-based nano-LC) are examined in detail, along with their application to biomarker discovery. Particular emphasis is placed on methods and technologies that allow structure-specific glycan profiling.
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41
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Schulz BL, Cooper-White J, Punyadeera CK. Saliva proteome research: current status and future outlook. Crit Rev Biotechnol 2012; 33:246-59. [DOI: 10.3109/07388551.2012.687361] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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42
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He X, Galpin JD, Tropak MB, Mahuran D, Haselhorst T, von Itzstein M, Kolarich D, Packer NH, Miao Y, Jiang L, Grabowski GA, Clarke LA, Kermode AR. Production of active human glucocerebrosidase in seeds of Arabidopsis thaliana complex-glycan-deficient (cgl) plants. Glycobiology 2012; 22:492-503. [PMID: 22061999 PMCID: PMC3425599 DOI: 10.1093/glycob/cwr157] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
There is a clear need for efficient methods to produce protein therapeutics requiring mannose-termination for therapeutic efficacy. Here we report on a unique system for production of active human lysosomal acid β-glucosidase (glucocerebrosidase, GCase, EC 3.2.1.45) using seeds of the Arabidopsis thaliana complex-glycan-deficient (cgl) mutant, which are deficient in the activity of N-acetylglucosaminyl transferase I (EC 2.4.1.101). Gaucher disease is a prevalent lysosomal storage disease in which affected individuals inherit mutations in the gene (GBA1) encoding GCase. A gene cassette optimized for seed expression was used to generate the human enzyme in seeds of the cgl (C5) mutant, and the recombinant GCase was mainly accumulated in the apoplast. Importantly, the enzymatic properties including kinetic parameters, half-maximal inhibitory concentration of isofagomine and thermal stability of the cgl-derived GCase were comparable with those of imiglucerase, a commercially available recombinant human GCase used for enzyme replacement therapy in Gaucher patients. N-glycan structural analyses of recombinant cgl-GCase showed that the majority of the N-glycans (97%) were mannose terminated. Additional purification was required to remove ∼15% of the plant-derived recombinant GCase that possessed potentially immunogenic (xylose- and/or fucose-containing) N-glycans. Uptake of cgl-derived GCase by mouse macrophages was similar to that of imiglucerase. The cgl seed system requires no addition of foreign (non-native) amino acids to the mature recombinant GCase protein, and the dry transgenic seeds represent a stable repository of the therapeutic protein. Other strategies that may completely prevent plant-like complex N-glycans are discussed, including the use of a null cgl mutant.
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Affiliation(s)
- Xu He
- Department of Biological Sciences, Simon Fraser University, 8888 University Dr., Burnaby, British Columbia, V5A 1S6, Canada
| | - Jason D Galpin
- Department of Biological Sciences, Simon Fraser University, 8888 University Dr., Burnaby, British Columbia, V5A 1S6, Canada
| | - Michael B Tropak
- Research Institute, Hospital for Sick Children, 555 University Avenue, Toronto, Ontario, M5G 1X8, Canada
| | - Don Mahuran
- Research Institute, Hospital for Sick Children, 555 University Avenue, Toronto, Ontario, M5G 1X8, Canada
- Department of Laboratory Medicine and Pathology, University of Toronto, Banting Institute, 100 College Street, Toronto, Ontario, M5G 1L5, Canada
| | - Thomas Haselhorst
- Institute for Glycomics, Griffith University, Gold Coast Campus, Queensland 4222, Australia
| | - Mark von Itzstein
- Institute for Glycomics, Griffith University, Gold Coast Campus, Queensland 4222, Australia
| | - Daniel Kolarich
- Department of Chemistry and Biomolecular Scienes, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Nicolle H Packer
- Department of Chemistry and Biomolecular Scienes, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Yansong Miao
- Department of Biology and Molecular Biotechnology Program, Centre for Cell and Developmental Biology, the Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Liwen Jiang
- Department of Biology and Molecular Biotechnology Program, Centre for Cell and Developmental Biology, the Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Gregory A Grabowski
- Cincinnati Children’s Hospital Medical Center, Division of Human Genetics, Department of Pediatrics, University of Cincinnati, Cincinnati, OH 45229, USA
| | - Lorne A Clarke
- Department of Medical Genetics, University of British Columbia, Children’s and Family Research Institute, 950 W 28th Ave., Vancouver, BC, V6T 1Z4, Canada
| | - Allison R Kermode
- Department of Biological Sciences, Simon Fraser University, 8888 University Dr., Burnaby, British Columbia, V5A 1S6, Canada
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Karlsson NG, McGuckin MA. O-Linked glycome and proteome of high-molecular-mass proteins in human ovarian cancer ascites: Identification of sulfation, disialic acid and O-linked fucose. Glycobiology 2012; 22:918-29. [PMID: 22422444 DOI: 10.1093/glycob/cws060] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The O-linked glycosylation of the main acidic high-molecular-weight glycoprotein from ascites fluid from patients with ovarian cancer were analyzed. The O-linked oligosaccharides were shown to consist of mainly highly sialylated core 1 and 2 structures with a smaller amount of sulfated core 2 structures. These structures were shown to be able to be further extended into small keratan sulfate (KS)-type oligosaccharides with up to four N-acetyllactosamine units. Proteomic studies of the acidic fraction of ascites fluid from patients with ovarian cancer showed that this fraction was enriched in proteoglycans. Among them, lumican, agrin, versican and dystroglycans were potential candidates, with threonine- and serine-rich domains that could carry a significant amount of O-linked glycosylation, including also the O-linked KS. Glycomic analysis using liquid chromatography (LC)-tandem mass spectrometry (MS/MS) also showed that the disialic acid NeuAc-NeuAc- was frequently found as the terminating structure on the O-linked core 1 and 2 oligosaccharides from one ascites sample. Also, a small amount of the epidermal growth factor (EGF)-associated O-linked fucose structure Gal-GlcNAc-Fucitol was detected with and without sialic acid in the LC-MS/MS analysis. Candidate proteins containing O-linked fucose were suggested to be proteoglycan-type molecules containing the O-linked fucose EGF consensus domain.
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Boonyapranai K, Tsai HY, Chen MCM, Sriyam S, Sinchaikul S, Phutrakul S, Chen ST. Glycoproteomic analysis and molecular modeling of haptoglobin multimers. Electrophoresis 2011; 32:1422-32. [PMID: 21692080 DOI: 10.1002/elps.201000464] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Extra-thiol groups on the α-subunit allow haptoglobin (Hp) to form a variety of native multimers which influence the biophysical and biological properties of Hp. In this work, we demonstrated how differences of multimeric conformation alter the glycosylation of Hp. The isoform distributions of different multimers were examined by an alternative approach, i.e. 3-D-(Native/IEF/SDS)-PAGE, which revealed differences in N-glycosylation among individual multimers of the same Hp sample. Glycomic mapping of permethylated N-glycan indicated that the assembled monomer and multimeric conformation modulate the degree of glycosylation, especially the reduction in terminal sialic acid residues on the bi-antennary glycan. Loss of the terminal sialic acid in the higher order multimers increases the number of terminal galactose residues, which may contribute to conformation of Hp. A molecular model of the glycosylated Hp multimer was constructed, suggesting that the effect of steric hindrance on multimeric formation is critical for the enlargement of the glycan moieties on either side of the monomer. In addition, N241 of Hp was partially glycosylated, even though this site is unaffected by steric consideration. Thus, the present study provides evidence for the alteration of glycan structures on different multimeric conformations of Hp, improving our knowledge of conformation-dependent function of this glycoprotein.
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Affiliation(s)
- Kongsak Boonyapranai
- Institute of Biological Chemistry and Genomics Research Center, Academia Sinica, Taipei, Taiwan
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Nakano M, Saldanha R, Göbel A, Kavallaris M, Packer NH. Identification of glycan structure alterations on cell membrane proteins in desoxyepothilone B resistant leukemia cells. Mol Cell Proteomics 2011; 10:M111.009001. [PMID: 21859949 DOI: 10.1074/mcp.m111.009001] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Resistance to tubulin-binding agents used in cancer is often multifactorial and can include changes in drug accumulation and modified expression of tubulin isotypes. Glycans on cell membrane proteins play important roles in many cellular processes such as recognition and apoptosis, and this study investigated whether changes to the glycan structures on cell membrane proteins occur when cells become resistant to drugs. Specifically, we investigated the alteration of glycan structures on the cell membrane proteins of human T-cell acute lymphoblastic leukemia (CEM) cells that were selected for resistance to desoxyepothilone B (CEM/dEpoB). The glycan profile of the cell membrane glycoproteins was obtained by sequential release of N- and O-glycans from cell membrane fraction dotted onto polyvinylidene difluoride membrane with PNGase F and β-elimination respectively. The released glycan alditols were analyzed by liquid chromatography (graphitized carbon)-electrospray ionization tandem MS. The major N-glycan on CEM cell was the core fucosylated α2-6 monosialo-biantennary structure. Resistant CEM/dEpoB cells had a significant decrease of α2-6 linked sialic acid on N-glycans. The lower α2-6 sialylation was caused by a decrease in activity of β-galactoside α2-6 sialyltransferase (ST6Gal), and decreased expression of the mRNA. It is clear that the membrane glycosylation of leukemia cells changes during acquired resistance to dEpoB drugs and that this change occurs globally on all cell membrane glycoproteins. This is the first identification of a specific glycan modification on the surface of drug resistant cells and the mechanism of this downstream effect on microtubule targeting drugs may offer a route to new interventions to overcome drug resistance.
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Affiliation(s)
- Miyako Nakano
- Department of Chemistry and Biomolecular Sciences, Macquarie University, NSW 2109, Australia
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Blanchard V, Liu X, Eigel S, Kaup M, Rieck S, Janciauskiene S, Sandig V, Marx U, Walden P, Tauber R, Berger M. N-glycosylation and biological activity of recombinant human alpha1-antitrypsin expressed in a novel human neuronal cell line. Biotechnol Bioeng 2011; 108:2118-28. [DOI: 10.1002/bit.23158] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 03/01/2011] [Accepted: 03/30/2011] [Indexed: 11/11/2022]
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Maresca B, Cigliano L, Corsaro MM, Pieretti G, Natale M, Bucci EM, Dal Piaz F, Balato N, Nino M, Ayala F, Abrescia P. Quantitative determination of haptoglobin glycoform variants in psoriasis. Biol Chem 2011; 391:1429-39. [PMID: 21087091 DOI: 10.1515/bc.2010.146] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Haptoglobin is an acute phase glycoprotein, secreted by hepatocytes and other types of cells including keratinocytes. Haptoglobin has been suggested to impair the immune response, inhibit gelatinases in the extracellular matrix and promote angiogenesis, but its role in psoriasis is obscure to date. Changes in haptoglobin glycan structure were observed in several diseases. The aim of this study was to investigate whether haptoglobin displays glycan variations in psoriasis. We found that the pattern of plasma haptoglobin glycoforms, following two-dimensional electrophoresis, exhibited significant quantitative differences in spot intensities between patients and controls. Quantitative and qualitative differences in glycan mass, between patients and controls, were found by mass spectrometry of glycopeptides from tryptic digests of protein isolated from both patients and controls. The number of distinct fucosylated glycoforms of peptides NLFLNHSENATAK and MVSHHNLTTGATLINEQWLLTTAK was higher in patients than in controls, but no fucosylated glycan was detected on peptide VVLHPNYSQ-VDIGLIK in either case. The number of peptides with distinct triantennary and tetraantennary glycans was higher in patients than in controls. Abundance or structure of specific glycans, which are present in haptoglobin from patients and are different or missing in normal haptoglobin, might be associated with disease activity.
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Affiliation(s)
- Bernardetta Maresca
- Dipartimento di Patologia Sistematica - Sezione di Dermatologia, Università di Napoli Federico II, Italy
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Zhang S, Shu H, Luo K, Kang X, Zhang Y, Lu H, Liu Y. N-linked glycan changes of serum haptoglobin β chain in liver disease patients. MOLECULAR BIOSYSTEMS 2011; 7:1621-8. [PMID: 21380457 DOI: 10.1039/c1mb05020f] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Human haptoglobin is a serum glycoprotein secreted by the liver with four potential N-glycosylation sites on its β chain. Many studies have reported glycan changes of haptoglobin in diseases such as breast cancer and pancreatic cancer. The objective of our study is to analyze N-linked glycan alterations of serum haptoglobin β chain obtained from patients with the hepatitis B virus (HBV), liver cirrhosis (LC) and hepatocellular carcinoma (HCC). MALDI-QIT-TOF mass spectrometry revealed the intensity of m/z 1809.6, identified as a fucosylated glycan, was much higher in samples from patients with LC and HCC relative to the patients with HBV and healthy controls. Compared with LC patients, triantennary glycan was elevated and the biantennary structure was decreased in the haptoglobin β chain of HCC patients. Thus, alterations in the glycan structure of the haptoglobin β chain may constitute significant spectral signatures of cirrhosis and HCC disease.
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Affiliation(s)
- Shu Zhang
- Liver Cancer Institute, Zhongshan Hospital, Fudan University, 136 Yi Xue Yuan Road, Shanghai 200032, PR China
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Lee A, Nakano M, Hincapie M, Kolarich D, Baker MS, Hancock WS, Packer NH. The lectin riddle: glycoproteins fractionated from complex mixtures have similar glycomic profiles. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2010; 14:487-99. [PMID: 20726804 DOI: 10.1089/omi.2010.0075] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
One common method used for analyzing the glycoproteome is chromatography using multiple lectins that display different affinities toward oligosaccharide structures. Much has been done to determine lectin affinity using standard glycoproteins with known glycosylation; however, a knowledge of the selectivity and specificity of lectins exposed to complex mixtures of proteins is required if they are to be used as a means of studying the glycoproteome. In the present study, three lectins (Concanavalin A, Jacalin, and Wheat Germ Agglutinin) were used to fractionate glycoproteins from two different complex environments: (1) cell membranes and (2) plasma. Reproducible enrichment of glycoproteins from these samples has been shown to result from the combined use of these lectins. However, the global glycan profiles of the released N- and O-linked oligosaccharides from the glycoproteins retained by the lectins, and from those glycoproteins that did not bind, using both these complex samples, were found to be very similar. That is, although the lectins selectively and reproducibly retained some glycoproteins, other proteins with the same attached oligosaccharide structures did not bind. Some small N- and O-glycan differences were observed in the bound fractions but there was little absolute specificity toward individual oligosaccharide structures known to have high affinity to these lectins. These data indicate that lectins are useful for fractionating glycoproteins from complex mixtures, but that the overall glycoproteome is not isolated by this approach.
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Affiliation(s)
- Albert Lee
- Department of Chemistry and Biomolecular Sciences, Macquarie University, Australia
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