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Dutt M, Hartel G, Richards RS, Shah AK, Mohamed A, Apostolidou S, Gentry‐Maharaj A, Hooper JD, Perrin LC, Menon U, Hill MM. Discovery and validation of serum glycoprotein biomarkers for high grade serous ovarian cancer. Proteomics Clin Appl 2023; 17:e2200114. [PMID: 37147936 PMCID: PMC7615076 DOI: 10.1002/prca.202200114] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 04/06/2023] [Accepted: 04/27/2023] [Indexed: 05/07/2023]
Abstract
PURPOSE This study aimed to identify serum glycoprotein biomarkers for early detection of high-grade serous ovarian cancer (HGSOC), the most common and aggressive histotype of ovarian cancer. EXPERIMENTAL DESIGN The glycoproteomics pipeline lectin magnetic bead array (LeMBA)-mass spectrometry (MS) was used in age-matched case-control serum samples. Clinical samples collected at diagnosis were divided into discovery (n = 30) and validation (n = 98) sets. We also analysed a set of preclinical sera (n = 30) collected prior to HGSOC diagnosis in the UK Collaborative Trial of Ovarian Cancer Screening. RESULTS A 7-lectin LeMBA-MS/MS discovery screen shortlisted 59 candidate proteins and three lectins. Validation analysis using 3-lectin LeMBA-multiple reaction monitoring (MRM) confirmed elevated A1AT, AACT, CO9, HPT and ITIH3 and reduced A2MG, ALS, IBP3 and PON1 glycoforms in HGSOC. The best performing multimarker signature had 87.7% area under the receiver operating curve, 90.7% specificity and 70.4% sensitivity for distinguishing HGSOC from benign and healthy groups. In the preclinical set, CO9, ITIH3 and A2MG glycoforms were altered in samples collected 11.1 ± 5.1 months prior to HGSOC diagnosis, suggesting potential for early detection. CONCLUSIONS AND CLINICAL RELEVANCE Our findings provide evidence of candidate early HGSOC serum glycoprotein biomarkers, laying the foundation for further study in larger cohorts.
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Affiliation(s)
- Mriga Dutt
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia
| | - Gunter Hartel
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia
| | | | - Alok K. Shah
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia
| | - Ahmed Mohamed
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia
| | - Sophia Apostolidou
- MRC Clinical Trials UnitInstitute of Clinical Trials and Methodology, University College LondonLondonUK
| | - Aleksandra Gentry‐Maharaj
- MRC Clinical Trials UnitInstitute of Clinical Trials and Methodology, University College LondonLondonUK
| | | | - John D. Hooper
- Mater Research Institute – The University of QueenslandTranslational Research InstituteWoolloongabbaQLDAustralia
| | - Lewis C. Perrin
- Mater Research Institute – The University of QueenslandTranslational Research InstituteWoolloongabbaQLDAustralia
- Mater Adult HospitalSouth BrisbaneQLDAustralia
| | - Usha Menon
- MRC Clinical Trials UnitInstitute of Clinical Trials and Methodology, University College LondonLondonUK
| | - Michelle M. Hill
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia
- UQ Centre for Clinical ResearchFaculty of MedicineThe University of QueenslandBrisbaneAustralia
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2
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Bottom-Up Proteomics: Advancements in Sample Preparation. Int J Mol Sci 2023; 24:ijms24065350. [PMID: 36982423 PMCID: PMC10049050 DOI: 10.3390/ijms24065350] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/28/2023] [Accepted: 03/09/2023] [Indexed: 03/14/2023] Open
Abstract
Liquid chromatography–tandem mass spectrometry (LC–MS/MS)-based proteomics is a powerful technique for profiling proteomes of cells, tissues, and body fluids. Typical bottom-up proteomic workflows consist of the following three major steps: sample preparation, LC–MS/MS analysis, and data analysis. LC–MS/MS and data analysis techniques have been intensively developed, whereas sample preparation, a laborious process, remains a difficult task and the main challenge in different applications. Sample preparation is a crucial stage that affects the overall efficiency of a proteomic study; however, it is prone to errors and has low reproducibility and throughput. In-solution digestion and filter-aided sample preparation are the typical and widely used methods. In the past decade, novel methods to improve and facilitate the entire sample preparation process or integrate sample preparation and fractionation have been reported to reduce time, increase throughput, and improve reproducibility. In this review, we have outlined the current methods used for sample preparation in proteomics, including on-membrane digestion, bead-based digestion, immobilized enzymatic digestion, and suspension trapping. Additionally, we have summarized and discussed current devices and methods for integrating different steps of sample preparation and peptide fractionation.
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Semi-Automated Lectin Magnetic Bead Array (LeMBA) for Translational Serum Glycoprotein Biomarker Discovery and Validation. Methods Mol Biol 2023; 2628:395-411. [PMID: 36781799 DOI: 10.1007/978-1-0716-2978-9_25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Aberrant protein glycosylation is a characteristic of diverse diseases which has been explored as biomarkers. To support translational serum glycoprotein biomarker discovery and validation, we developed a semi-automated workflow using individual lectin-coupled magnetic beads to conduct lectin pulldowns in a high-throughput format. Lectins are naturally occurring glycoprotein binding proteins widely used in glycobiology. While lectin-affinity isolation has been coupled to mass spectrometry-based proteomics, the lectin magnetic bead array (LeMBA) platform allows technically robust screening and measurement of clinical cohorts. This chapter describes detailed lectin-magnetic bead coupling, serum denaturation, lectin magnetic bead pulldown, and on-bead trypsin digest. The resulting tryptic peptides are analyzed by untargeted or targeted liquid chromatography-mass spectrometry (LC-MS), for biomarker discovery, or qualification/validation, respectively. LeMBA-MS generates quantitative data for glycoforms based on lectin affinity of the glycoprotein coupled with MS measurement of one or more prototypic peptides and has successfully been used to discover and validate novel serum cancer glycoprotein biomarkers. This chapter includes detailed protocols for two different liquid handlers, along with recommendations on quality control measures for clinical biomarker studies.
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Gao W, Bai Y, Liu H. [Recent advances in functionalized magnetic nanomaterials for glycoprotein and glycopeptide enrichment]. Se Pu 2021; 39:981-988. [PMID: 34486837 PMCID: PMC9404082 DOI: 10.3724/sp.j.1123.2021.08012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
蛋白质糖基化作为最重要的翻译后修饰之一,在生物体诸如细胞信号转导、蛋白质翻译调控、免疫应答等诸多生命过程中发挥重要作用。此外,蛋白质的异常糖基化还与肿瘤等疾病的发生发展密切相关,这为以糖蛋白为目标的疾病生物标志物的发现提供了可能。尽管质谱已经成为糖蛋白质组学的重要分析工具,但糖肽的低丰度和低电离效率使得其直接质谱分析仍面临挑战。在糖蛋白质组学研究中,从复杂的生物样品中富集糖蛋白和糖肽是重要的环节。磁性固相萃取(MSPE)是一种操作简单、成本低和萃取效率高的样品预处理方法。在磁性固相萃取中,磁性吸附剂是影响萃取效果的关键,将功能化磁性纳米材料作为吸附剂进行糖蛋白质组学研究已经得到广泛应用。该文综述了糖分子、离子液体、凝集素、硼酸亲和配体、金属有机框架、共价有机骨架等功能化磁性纳米材料的制备及其在糖蛋白及糖肽富集中的应用。上述功能化磁性纳米材料具有高比表面积、大量作用位点等特点,其富集机理包括亲水相互作用色谱、凝集素亲和作用色谱、硼酸化学法和肼化学法等,主要应用于血清、血浆、细胞、组织、唾液等样品的糖蛋白和糖肽的富集。该文引用了近十年来发表的约90篇源于科学引文索引(SCI)与中文核心期刊的相关论文,并于文末对磁性纳米材料在糖蛋白和糖肽富集领域的发展趋势进行了展望。
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Affiliation(s)
- Wenjie Gao
- Beijing National Laboratory of Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yu Bai
- Beijing National Laboratory of Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Huwei Liu
- Beijing National Laboratory of Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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Webster JA, Wuethrich A, Shanmugasundaram KB, Richards RS, Zelek WM, Shah AK, Gordon LG, Kendall BJ, Hartel G, Morgan BP, Trau M, Hill MM. Development of EndoScreen Chip, a Microfluidic Pre-Endoscopy Triage Test for Esophageal Adenocarcinoma. Cancers (Basel) 2021; 13:2865. [PMID: 34201241 PMCID: PMC8229863 DOI: 10.3390/cancers13122865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/03/2021] [Accepted: 06/03/2021] [Indexed: 12/11/2022] Open
Abstract
The current endoscopy and biopsy diagnosis of esophageal adenocarcinoma (EAC) and its premalignant condition Barrett's esophagus (BE) is not cost-effective. To enable EAC screening and patient triaging for endoscopy, we developed a microfluidic lectin immunoassay, the EndoScreen Chip, which allows sensitive multiplex serum biomarker measurements. Here, we report the proof-of-concept deployment for the EAC biomarker Jacalin lectin binding complement C9 (JAC-C9), which we previously discovered and validated by mass spectrometry. A monoclonal C9 antibody (m26 3C9) was generated and validated in microplate ELISA, and then deployed for JAC-C9 measurement on EndoScreen Chip. Cohort evaluation (n = 46) confirmed the expected elevation of serum JAC-C9 in EAC, along with elevated total serum C9 level. Next, we asked if the small panel of serum biomarkers improves detection of EAC in this cohort when used in conjunction with patient risk factors (age, body mass index and heartburn history). Using logistic regression modeling, we found that serum C9 and JAC-C9 significantly improved EAC prediction from AUROC of 0.838 to 0.931, with JAC-C9 strongly predictive of EAC (vs. BE OR = 4.6, 95% CI: 1.6-15.6, p = 0.014; vs. Healthy OR = 4.1, 95% CI: 1.2-13.7, p = 0.024). This proof-of-concept study confirms the microfluidic EndoScreen Chip technology and supports the potential utility of blood biomarkers in improving triaging for diagnostic endoscopy. Future work will expand the number of markers on EndoScreen Chip from our list of validated EAC biomarkers.
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Affiliation(s)
- Julie A. Webster
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia; (J.A.W.); (R.S.R.); (A.K.S.); (L.G.G.); (B.J.K.); (G.H.)
| | - Alain Wuethrich
- Centre for Personalised Nanomedicine, Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane City, QLD 4072, Australia; (A.W.); (K.B.S.); (M.T.)
| | - Karthik B. Shanmugasundaram
- Centre for Personalised Nanomedicine, Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane City, QLD 4072, Australia; (A.W.); (K.B.S.); (M.T.)
| | - Renee S. Richards
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia; (J.A.W.); (R.S.R.); (A.K.S.); (L.G.G.); (B.J.K.); (G.H.)
| | - Wioleta M. Zelek
- Division of Infection and Immunity, Cardiff University, Heath Park, Cardiff CF10 3AX, UK; (W.M.Z.); (B.P.M.)
| | - Alok K. Shah
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia; (J.A.W.); (R.S.R.); (A.K.S.); (L.G.G.); (B.J.K.); (G.H.)
| | - Louisa G. Gordon
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia; (J.A.W.); (R.S.R.); (A.K.S.); (L.G.G.); (B.J.K.); (G.H.)
| | - Bradley J. Kendall
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia; (J.A.W.); (R.S.R.); (A.K.S.); (L.G.G.); (B.J.K.); (G.H.)
- Faculty of Medicine, The University of Queensland, Herston, Brisbane, QLD 4102, Australia
- Department of Gastroenterolgy and Hepatology, Princess Alexandra Hospital, Brisbane, QLD 4102, Australia
| | - Gunter Hartel
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia; (J.A.W.); (R.S.R.); (A.K.S.); (L.G.G.); (B.J.K.); (G.H.)
| | - B. Paul Morgan
- Division of Infection and Immunity, Cardiff University, Heath Park, Cardiff CF10 3AX, UK; (W.M.Z.); (B.P.M.)
| | - Matt Trau
- Centre for Personalised Nanomedicine, Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane City, QLD 4072, Australia; (A.W.); (K.B.S.); (M.T.)
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Michelle M. Hill
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia; (J.A.W.); (R.S.R.); (A.K.S.); (L.G.G.); (B.J.K.); (G.H.)
- Faculty of Medicine, The University of Queensland, Herston, Brisbane, QLD 4102, Australia
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Oungsakul P, Choi E, Shah AK, Mohamed A, O’Leary C, Duffy D, Hill MM, Bielefeldt-Ohmann H. Candidate Glycoprotein Biomarkers for Canine Visceral Hemangiosarcoma and Validation Using Semi-Quantitative Lectin/Immunohistochemical Assays. Vet Sci 2021; 8:vetsci8030038. [PMID: 33673507 PMCID: PMC7997418 DOI: 10.3390/vetsci8030038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/21/2021] [Accepted: 02/23/2021] [Indexed: 11/16/2022] Open
Abstract
Visceral hemangiosarcoma (HSA) is one of the more frequent cancers in dogs and has a high metastatic rate and poor prognosis, as clinical signs only become apparent in advanced stages of tumor development. In order to improve early and differential diagnostic capabilities and hence, prognosis for dogs with HSA, two types of biomarker are needed: a point-of-care diagnostic biomarker and a prognostic biomarker—preferentially based on samples obtained with minimally invasive methods. In this study, we applied a lectin magnetic bead array-coupled tandem mass spectrometry (LeMBA-MS/MS) workflow through discovery and validation phases to discover serum glycoprotein biomarker candidates for canine HSA. By this approach, we found that Datura stramonium (DSA), wheat germ agglutinin (WGA), Sambucus nigra (SNA), and Pisum sativum (PSA) lectins captured the highest number of validated candidate glycoproteins. Secondly, we independently validated serum LeMBA-MS/MS results by demonstrating the in situ relationship of lectin-binding with tumor cells. Using lectin-histochemistry and immunohistochemistry (IHC) for key proteins on tissues with HSA and semi-quantitation of the signals, we demonstrate that a combination of DSA histochemistry and IHC for complement C7 greatly increases the prospect of a more specific diagnosis of canine HSA.
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Affiliation(s)
- Patharee Oungsakul
- School of Veterinary Science, The University of Queensland, Gatton, QLD 4343, Australia; (P.O.); (C.O.)
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia; (E.C.); (A.K.S.); (D.D.); (M.M.H.)
| | - Eunju Choi
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia; (E.C.); (A.K.S.); (D.D.); (M.M.H.)
- Department of Pathology, Microbiology & Immunology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Alok K. Shah
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia; (E.C.); (A.K.S.); (D.D.); (M.M.H.)
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia;
| | - Ahmed Mohamed
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia;
| | - Caroline O’Leary
- School of Veterinary Science, The University of Queensland, Gatton, QLD 4343, Australia; (P.O.); (C.O.)
| | - David Duffy
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia; (E.C.); (A.K.S.); (D.D.); (M.M.H.)
- QIMR Berghofer Medical Research Institute, Herston, QLD 4006, Australia;
| | - Michelle M. Hill
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia; (E.C.); (A.K.S.); (D.D.); (M.M.H.)
- Department of Pathology, Microbiology & Immunology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Helle Bielefeldt-Ohmann
- School of Veterinary Science, The University of Queensland, Gatton, QLD 4343, Australia; (P.O.); (C.O.)
- School of Chemistry & Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
- Correspondence:
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Pietrzyk-Brzezinska AJ, Bujacz A. H-type lectins - Structural characteristics and their applications in diagnostics, analytics and drug delivery. Int J Biol Macromol 2020; 152:735-747. [PMID: 32119947 DOI: 10.1016/j.ijbiomac.2020.02.320] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/27/2020] [Accepted: 02/27/2020] [Indexed: 12/15/2022]
Abstract
Lectins are ubiquitous carbohydrate-binding proteins that interact with sugar moieties in a highly specific manner. H-type lectins represent a new group of lectins that were identified in invertebrates. These lectins share structural homology and bind mainly to N-acetylgalactosamine (GalNAc). Recent structural studies on the H-type lectins provided a detailed description of the GalNAc-lectin interaction that is already exploited in a number of biomedical applications. Two members of the H-type lectin family, Helix pomatia agglutinin (HPA) and Helix aspersa agglutinin (HAA), have already been extensively used in many diagnostic tests due their ability to specifically recognize GalNAc. This ability is especially important because aberrant glycosylation patterns of proteins expressed by cancer cells contain GalNAc. In addition, H-type lectins were utilized in diagnostics of other non-cancer diseases and represent great potential as components of drug delivery systems. Here, we present an overview of the H-type lectins and their applications in diagnostics, analytics and drug delivery.
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Affiliation(s)
- Agnieszka J Pietrzyk-Brzezinska
- Institute of Molecular and Industrial Biotechnology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Stefanowskiego 4/10, Lodz 90-924, Poland.
| | - Anna Bujacz
- Institute of Molecular and Industrial Biotechnology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Stefanowskiego 4/10, Lodz 90-924, Poland
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Abstract
Cancer has high incidence and it will continue to increase over the next decades. Detection and quantification of cancer-associated biomarkers is frequently carried out for diagnosis, prognosis and treatment monitoring at various disease stages. It is well-known that glycosylation profiles change significantly during oncogenesis. Aberrant glycans produced during tumorigenesis are, therefore, valuable molecules for detection and characterization of cancer, and for therapeutic design and monitoring. Although glycoproteomics has benefited from the development of analytical tools such as high performance liquid chromatography, two-dimensional gel and capillary electrophoresis and mass spectrometry, these approaches are not well suited for rapid point-of-care (POC) testing easily performed by medical staff. Lectins are biomolecules found in nature with specific affinities toward particular glycan structures and bind them thus forming a relatively strong complex. Because of this characteristic, lectins have been used in analytical techniques for the selective capture or separation of certain glycans in complex samples, namely, in lectin affinity chromatography, or to characterize glycosylation profiles in diverse clinical situations, using lectin microarrays. Lectin-based biosensors have been developed for the detection of specific aberrant and cancer-associated glycostructures to aid diagnosis, prognosis and treatment assessment of these patients. The attractive features of biosensors, such as portability and simple use make them highly suitable for POC testing. Recent developments in lectin biosensors, as well as their potential and pitfalls in cancer glycan biomarker detection, are presented in this chapter.
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Affiliation(s)
- M Luísa S Silva
- Centre of Chemical Research, Autonomous University of Hidalgo State, Pachuca, Hidalgo, México.
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9
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Lee J, Kim H, Sohn A, Yeo I, Kim Y. Cost-Effective Automated Preparation of Serum Samples for Reproducible Quantitative Clinical Proteomics. J Proteome Res 2019; 18:2337-2345. [PMID: 30985128 DOI: 10.1021/acs.jproteome.9b00023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Reproducible sample preparation remains a significant challenge in large-scale clinical research using selected reaction monitoring-mass spectrometry (SRM-MS), which enables a highly sensitive multiplexed assay. Although automated liquid-handling platforms have tremendous potential for addressing this issue, the high cost of their consumables is a drawback that renders routine operation expensive. Here we evaluated the performance of a liquid-handling platform in preparing serum samples compared with a standard experiment while reducing the outlay for consumables, such as tips, wasted reagents, and reagent stock plates. A total of 26 multiplex assays were quantified by SRM-MS using four sets of 24 pooled human serum aliquots; the four sets used a fixed number (1, 4, 8, or 24) of tips to dispense digestion reagents. This study demonstrated that the use of 4 or 8 tips is comparable to 24 tips (standard experiment), as evidenced by their coefficients of variation: 13.5% (for 4 and 8 tips) versus 12.0% (24 tips). Thus we can save 37% of the total experimental cost compared with the standard experiment, maintaining nearly equivalent reproducibility. The routine operation of cost-effective liquid-handling platforms can enable researchers to process large-scale samples with high throughput, adding credibility to their findings by minimizing human error.
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Affiliation(s)
| | - Hyunsoo Kim
- Institute of Medical and Biological Engineering, MRC , Seoul National University , Seoul , Korea
| | | | - Injoon Yeo
- Interdisciplinary Program of Bioengineering , Seoul National University College of Engineering , Seoul , Korea
| | - Youngsoo Kim
- Institute of Medical and Biological Engineering, MRC , Seoul National University , Seoul , Korea.,Interdisciplinary Program of Bioengineering , Seoul National University College of Engineering , Seoul , Korea
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10
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Srinivasan S, Stephens C, Wilson E, Panchadsaram J, DeVoss K, Koistinen H, Stenman UH, Brook MN, Buckle AM, Klein RJ, Lilja H, Clements J, Batra J. Prostate Cancer Risk-Associated Single-Nucleotide Polymorphism Affects Prostate-Specific Antigen Glycosylation and Its Function. Clin Chem 2018; 65:e1-e9. [PMID: 30538125 DOI: 10.1373/clinchem.2018.295790] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 11/15/2018] [Indexed: 01/07/2023]
Abstract
BACKGROUND Genetic association studies have reported single-nucleotide polymorphisms (SNPs) at chromosome 19q13.3 to be associated with prostate cancer (PCa) risk. Recently, the rs61752561 SNP (Asp84Asn substitution) in exon 3 of the kallikrein-related peptidase 3 (KLK3) gene encoding prostate-specific antigen (PSA) was reported to be strongly associated with PCa risk (P = 2.3 × 10-8). However, the biological contribution of the rs61752561 SNP to PCa risk has not been elucidated. METHODS Recombinant PSA protein variants were generated to assess the SNP-mediated biochemical changes by stability and substrate activity assays. PC3 cell-PSA overexpression models were established to evaluate the effect of the SNP on PCa pathogenesis. Genotype-specific correlation of the SNP with total PSA (tPSA) concentrations and free/total (F/T) PSA ratio were determined from serum samples. RESULTS Functional analysis showed that the rs61752561 SNP affects PSA stability and structural conformation and creates an extra glycosylation site. This PSA variant had reduced enzymatic activity and the ability to stimulate proliferation and migration of PCa cells. Interestingly, the minor allele is associated with lower tPSA concentrations and high F/T PSA ratio in serum samples, indicating that the amino acid substitution may affect PSA immunoreactivity to the antibodies used in the clinical immunoassays. CONCLUSIONS The rs61752561 SNP appears to have a potential role in PCa pathogenesis by changing the glycosylation, protein stability, and PSA activity and may also affect the clinically measured F/T PSA ratio. Accounting for these effects on tPSA concentration and F/T PSA ratio may help to improve the accuracy of the current PSA test.
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Affiliation(s)
- Srilakshmi Srinivasan
- Australian Prostate Cancer Research Centre-Queensland and Cancer Program, Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia.,Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Carson Stephens
- Australian Prostate Cancer Research Centre-Queensland and Cancer Program, Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia.,Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Emily Wilson
- Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Janaththani Panchadsaram
- Australian Prostate Cancer Research Centre-Queensland and Cancer Program, Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia.,Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Kerry DeVoss
- Endocrinology, QML Pathology, Mansfield, Queensland, Australia
| | - Hannu Koistinen
- Department of Clinical Chemistry, Biomedicum Helsinki, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Ulf-Håkan Stenman
- Department of Clinical Chemistry, Biomedicum Helsinki, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | | | - Ashley M Buckle
- Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Robert J Klein
- Department of Genetics and Genomic Sciences and Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Hans Lilja
- Departments of Laboratory Medicine, Surgery (Urology Service) and Medicine (Genitourinary Oncology), Memorial Sloan Kettering Cancer Center, New York, NY.,Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK.,Department of Translational Medicine, Lund University, Malmö, Sweden
| | - Judith Clements
- Australian Prostate Cancer Research Centre-Queensland and Cancer Program, Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia.,Translational Research Institute, Woolloongabba, Queensland, Australia
| | - Jyotsna Batra
- Australian Prostate Cancer Research Centre-Queensland and Cancer Program, Institute of Health and Biomedical Innovation and School of Biomedical Sciences, Queensland University of Technology, Brisbane, Queensland, Australia; .,Translational Research Institute, Woolloongabba, Queensland, Australia
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11
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Shah AK, Hartel G, Brown I, Winterford C, Na R, Cao KAL, Spicer BA, Dunstone MA, Phillips WA, Lord RV, Barbour AP, Watson DI, Joshi V, Whiteman DC, Hill MM. Evaluation of Serum Glycoprotein Biomarker Candidates for Detection of Esophageal Adenocarcinoma and Surveillance of Barrett's Esophagus. Mol Cell Proteomics 2018; 17:2324-2334. [PMID: 30097534 DOI: 10.1074/mcp.ra118.000734] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/03/2018] [Indexed: 12/22/2022] Open
Abstract
Esophageal adenocarcinoma (EAC) is thought to develop from asymptomatic Barrett's esophagus (BE) with a low annual rate of conversion. Current endoscopy surveillance of BE patients is probably not cost-effective. Previously, we discovered serum glycoprotein biomarker candidates which could discriminate BE patients from EAC. Here, we aimed to validate candidate serum glycoprotein biomarkers in independent cohorts, and to develop a biomarker candidate panel for BE surveillance. Serum glycoprotein biomarker candidates were measured in 301 serum samples collected from Australia (4 states) and the United States (1 clinic) using previously established lectin magnetic bead array (LeMBA) coupled multiple reaction monitoring mass spectrometry (MRM-MS) tier 3 assay. The area under receiver operating characteristic curve (AUROC) was calculated as a measure of discrimination, and multivariate recursive partitioning was used to formulate a multi-marker panel for BE surveillance. Complement C9 (C9), gelsolin (GSN), serum paraoxonase/arylesterase 1 (PON1) and serum paraoxonase/lactonase 3 (PON3) were validated as diagnostic glycoprotein biomarkers in lectin pull-down samples for EAC across both cohorts. A panel of 10 serum glycoprotein biomarker candidates discriminated BE patients not requiring intervention (BE± low grade dysplasia) from those requiring intervention (BE with high grade dysplasia (BE-HGD) or EAC) with an AUROC value of 0.93. Tissue expression of C9 was found to be induced in BE, dysplastic BE and EAC. In longitudinal samples from subjects that have progressed toward EAC, levels of serum C9 were significantly (p < 0.05) increased with disease progression in EPHA (erythroagglutinin from Phaseolus vulgaris) and NPL (Narcissus pseudonarcissus lectin) pull-down samples. The results confirm alteration of complement pathway glycoproteins during BE-EAC pathogenesis. Further prospective clinical validation of the confirmed biomarker candidates in a large cohort is warranted, prior to development of a first-line BE surveillance blood test.
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Affiliation(s)
- Alok K Shah
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia; The University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Gunter Hartel
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Ian Brown
- Envoi Pathology, Brisbane, Queensland, Australia
| | - Clay Winterford
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Renhua Na
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Kim-Anh Lê Cao
- The University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia; Melbourne Integrative Genomics and School of Mathematics and Statistics, The University of Melbourne, Victoria, Australia
| | - Bradley A Spicer
- Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Victoria, Australia
| | - Michelle A Dunstone
- Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Victoria, Australia
| | - Wayne A Phillips
- Peter MacCallum Cancer Centre, and Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria, Australia
| | - Reginald V Lord
- St Vincent's Centre for Applied Medical Research and University of Notre Dame School of Medicine, Sydney, Australia
| | - Andrew P Barbour
- The University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - David I Watson
- Discipline of Surgery, Flinders University, Adelaide, South Australia, Australia
| | - Virendra Joshi
- Ochsner Health System, Gastroenterology, New Orleans, LA
| | - David C Whiteman
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Michelle M Hill
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia; The University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia.
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12
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Frost DC, Li L. Recent advances in mass spectrometry-based glycoproteomics. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2018; 95:71-123. [PMID: 24985770 DOI: 10.1016/b978-0-12-800453-1.00003-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Protein glycosylation plays fundamental roles in many biological processes as one of the most common, and the most complex, posttranslational modification. Alterations in glycosylation profile are now known to be associated with many diseases. As a result, the discovery and detailed characterization of glycoprotein disease biomarkers is a primary interest of biomedical research. Advances in mass spectrometry (MS)-based glycoproteomics and glycomics are increasingly enabling qualitative and quantitative approaches for site-specific structural analysis of protein glycosylation. While the complexity presented by glycan heterogeneity and the wide dynamic range of clinically relevant samples like plasma, serum, cerebrospinal fluid, and tissue make comprehensive analyses of the glycoproteome a challenging task, the ongoing efforts into the development of glycoprotein enrichment, enzymatic digestion, and separation strategies combined with novel quantitative MS methodologies have greatly improved analytical sensitivity, specificity, and throughput. This review summarizes current MS-based glycoproteomics approaches and highlights recent advances in its application to cancer biomarker and neurodegenerative disease research.
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Affiliation(s)
- Dustin C Frost
- School of Pharmacy, University of Wisconsin, Madison, Wisconsin, USA
| | - Lingjun Li
- School of Pharmacy, University of Wisconsin, Madison, Wisconsin, USA; Department of Chemistry, University of Wisconsin, Madison, Wisconsin, USA.
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13
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Nakata H, Wakayama T, Asano T, Nishiuchi T, Iseki S. Identification of sperm equatorial segment protein 1 in the acrosome as the primary binding target of peanut agglutinin (PNA) in the mouse testis. Histochem Cell Biol 2016; 147:27-38. [PMID: 27539077 DOI: 10.1007/s00418-016-1478-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2016] [Indexed: 12/01/2022]
Abstract
Peanut agglutinin (PNA), a plant lectin protein that recognizes the galactose β (1 -> 3) N-acetylgalactosamine carbohydrate sequence, has been widely used as a sperm acrosome-specific marker; however, the acrosomal glycoproteins that specifically bind to PNA have yet to be identified. We herein purified and identified PNA-binding glycoproteins in the mouse testis using biotinylated PNA and streptavidin-coupled magnetic beads, and liquid chromatography-tandem mass spectrometry (LC-MS/MS), respectively. In six repeated experiments, sperm equatorial segment protein 1 (SPESP1) was detected most frequently as a PNA-binding glycoprotein, followed by dipeptidase 3, proacrosin-binding protein, and acrosin prepropeptide. The identification of SPEPS1 in the testis lysate and its PNA-bound fraction was verified with lectin and Western blot analyses, and the co-localization of PNA and SPEPS1 in acrosomes was confirmed with lectin- and immunohistochemistry. Since the PNA reactivity of sperm acrosomes was observed not only in normal mice, but also in SPESP1-deficient mice, although at lower levels, PNA was also considered to bind to other candidate glycoproteins. The present study identified SPESP1 in the acrosome as the primary binding target of PNA in the mouse testis. Further defining the specific lectin-glycoprotein relationships in individual cells will enhance the value of lectin histochemistry.
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Affiliation(s)
- Hiroki Nakata
- Department of Histology and Cell Biology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, 920-8640, Japan
| | - Tomohiko Wakayama
- Department of Histology and Cell Biology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, 920-8640, Japan.,Department of Histology, Faculty of Life Sciences, Kumamoto University, Kumamoto, 860-8556, Japan
| | - Tomoya Asano
- Division of Functional Genomics, Advanced Science Research Center, Kanazawa University, Kanazawa, 920-8640, Japan
| | - Takumi Nishiuchi
- Division of Functional Genomics, Advanced Science Research Center, Kanazawa University, Kanazawa, 920-8640, Japan
| | - Shoichi Iseki
- Department of Histology and Cell Biology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, 920-8640, Japan.
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14
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Shah AK, Lê Cao KA, Choi E, Chen D, Gautier B, Nancarrow D, Whiteman DC, Baker PR, Clauser KR, Chalkley RJ, Saunders NA, Barbour AP, Joshi V, Hill MM. Glyco-centric lectin magnetic bead array (LeMBA) - proteomics dataset of human serum samples from healthy, Barrett׳s esophagus and esophageal adenocarcinoma individuals. Data Brief 2016; 7:1058-62. [PMID: 27408916 PMCID: PMC4927955 DOI: 10.1016/j.dib.2016.03.081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 03/14/2016] [Accepted: 03/25/2016] [Indexed: 11/30/2022] Open
Abstract
This data article describes serum glycoprotein biomarker discovery and qualification datasets generated using lectin magnetic bead array (LeMBA) – mass spectrometry techniques, “Serum glycoprotein biomarker discovery and qualification pipeline reveals novel diagnostic biomarker candidates for esophageal adenocarcinoma” [1]. Serum samples collected from healthy, metaplastic Barrett׳s esophagus (BE) and esophageal adenocarcinoma (EAC) individuals were profiled for glycoprotein subsets via differential lectin binding. The biomarker discovery proteomics dataset consisting of 20 individual lectin pull-downs for 29 serum samples with a spiked-in internal standard chicken ovalbumin protein has been deposited in the PRIDE partner repository of the ProteomeXchange Consortium with the data set identifier PRIDE: PXD002442. Annotated MS/MS spectra for the peptide identifications can be viewed using MS-Viewer (〈http://prospector2.ucsf.edu/prospector/cgi-bin/msform.cgi?form=msviewer〉) using search key “jn7qafftux”. The qualification dataset contained 6-lectin pulldown-coupled multiple reaction monitoring-mass spectrometry (MRM-MS) data for 41 protein candidates, from 60 serum samples. This dataset is available as a supplemental files with the original publication [1].
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Affiliation(s)
- Alok K. Shah
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Kim-Anh Lê Cao
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Eunju Choi
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
- School of Veterinary Science, The University of Queensland, Gatton, Queensland, Australia
| | - David Chen
- School of Information and Communication Technology, Griffith University, Brisbane, Queensland, Australia
| | - Benoît Gautier
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Derek Nancarrow
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - David C. Whiteman
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Peter R. Baker
- Mass Spectrometry Facility, Department of Pharmaceutical Chemistry, University of California, San Francisco, CA, USA
| | - Karl R. Clauser
- Proteomics Platform, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Robert J. Chalkley
- Mass Spectrometry Facility, Department of Pharmaceutical Chemistry, University of California, San Francisco, CA, USA
| | - Nicholas A. Saunders
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Andrew P. Barbour
- School of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Virendra Joshi
- Ochsner Health System, Gastroenterology, New Orleans, LA, USA
| | - Michelle M. Hill
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
- Correspondence to: The University of Queensland Diamantina Institute Level 5, Translational Research Institute, 37 Kent Street, Woolloongabba, QLD 4102, Australia. Tel.: +61 7 3443 7049; fax: +61 7 3443 5946.The University of Queensland Diamantina Institute Level 5, Translational Research Institute37 Kent StreetWoolloongabbaQLD4102Australia
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15
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Yadav S, Carrascosa LG, Sina AAI, Shiddiky MJA, Hill MM, Trau M. Electrochemical detection of protein glycosylation using lectin and protein–gold affinity interactions. Analyst 2016; 141:2356-61. [DOI: 10.1039/c6an00528d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
New electrochemical method to detect glycosylation of protein using lectin and protein gold interaction.
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Affiliation(s)
- Sharda Yadav
- Australian Institute for Bioengineering and Nanotechnology (AIBN)
- The University of Queensland
- Brisbane
- Australia
- The University of Queensland Diamantina Institute
| | - Laura G. Carrascosa
- Australian Institute for Bioengineering and Nanotechnology (AIBN)
- The University of Queensland
- Brisbane
- Australia
| | - Abu A. I. Sina
- Australian Institute for Bioengineering and Nanotechnology (AIBN)
- The University of Queensland
- Brisbane
- Australia
| | - Muhammad J. A. Shiddiky
- Australian Institute for Bioengineering and Nanotechnology (AIBN)
- The University of Queensland
- Brisbane
- Australia
| | - Michelle M. Hill
- Australian Institute for Bioengineering and Nanotechnology (AIBN)
- The University of Queensland
- Brisbane
- Australia
- The University of Queensland Diamantina Institute
| | - Matt Trau
- Australian Institute for Bioengineering and Nanotechnology (AIBN)
- The University of Queensland
- Brisbane
- Australia
- School of Chemistry and Molecular Biosciences
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16
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Caragata M, Shah AK, Schulz BL, Hill MM, Punyadeera C. Enrichment and identification of glycoproteins in human saliva using lectin magnetic bead arrays. Anal Biochem 2015; 497:76-82. [PMID: 26743719 DOI: 10.1016/j.ab.2015.11.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 11/23/2015] [Accepted: 11/24/2015] [Indexed: 01/21/2023]
Abstract
Aberrant glycosylation of proteins is a hallmark of tumorigenesis and could provide diagnostic value in cancer detection. Human saliva is an ideal source of glycoproteins due to the relatively high proportion of glycosylated proteins in the salivary proteome. Moreover, saliva collection is noninvasive and technically straightforward, and the sample collection and storage is relatively easy. Although differential glycosylation of proteins can be indicative of disease states, identification of differential glycosylation from clinical samples is not trivial. To facilitate salivary glycoprotein biomarker discovery, we optimized a method for differential glycoprotein enrichment from human saliva based on lectin magnetic bead arrays (saLeMBA). Selected lectins from distinct reactivity groups were used in the saLeMBA platform to enrich salivary glycoproteins from healthy volunteer saliva. The technical reproducibility of saLeMBA was analyzed with liquid chromatography-tandem mass spectrometry (LC-MS/MS) to identify the glycosylated proteins enriched by each lectin. Our saLeMBA platform enabled robust glycoprotein enrichment in a glycoprotein- and lectin-specific manner consistent with known protein-specific glycan profiles. We demonstrated that saLeMBA is a reliable method to enrich and detect glycoproteins present in human saliva.
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Affiliation(s)
- Michael Caragata
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Woolloongabba, Queensland, 4102, Australia
| | - Alok K Shah
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Woolloongabba, Queensland, 4102, Australia
| | - Benjamin L Schulz
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Michelle M Hill
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Woolloongabba, Queensland, 4102, Australia.
| | - Chamindie Punyadeera
- School of Biomedical Sciences, Institute of Biomedical Innovations, Queensland University of Technology, Kelvin Grove, and Translational Research Institute, Woolloongabba, Queensland, 4102, Australia.
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17
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Zacchi LF, Schulz BL. N-glycoprotein macroheterogeneity: biological implications and proteomic characterization. Glycoconj J 2015; 33:359-76. [DOI: 10.1007/s10719-015-9641-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/04/2015] [Accepted: 11/20/2015] [Indexed: 10/22/2022]
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18
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Pietrzyk AJ, Bujacz A, Mak P, Potempa B, Niedziela T. Structural studies of Helix aspersa agglutinin complexed with GalNAc: A lectin that serves as a diagnostic tool. Int J Biol Macromol 2015; 81:1059-68. [PMID: 26416237 DOI: 10.1016/j.ijbiomac.2015.09.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 09/22/2015] [Accepted: 09/23/2015] [Indexed: 02/07/2023]
Abstract
Lectins belong to a differentiated group of proteins known to possess sugar-binding properties. Due to this fact, they are interesting research targets in medical diagnostics. Helix aspersa agglutinin (HAA) is a lectin that recognizes the epitopes containing α-d-N-acetylgalactosamine (GalNAc), which is present at the surface of metastatic cancer cells. Although several reports have already described the use of HAA as a diagnostic tool, this protein was not characterized on the molecular level. Here, we present for the first time the structural information about lectin isolated from mucus of Helix aspersa (garden snail). The amino acid sequence of this agglutinin was determined by Edman degradation and tertiary as well as quaternary structure by X-ray crystallography. The high resolution crystal structure (1.38Å) and MALDI-TOF mass spectrometry analysis provide the detailed information about a large part of the HAA natural glycan chain. The topology of the GalNAc binding cleft and interaction with lectin are very well defined in the structure and fully confirmed by STD HSQC NMR spectroscopy. Together, this provides structural clues regarding HAA specificity and opens possibilities to rational modifications of this important diagnostic tool.
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Affiliation(s)
- Agnieszka J Pietrzyk
- Institute of Technical Biochemistry, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Stefanowskiego 4/10, Lodz 90-924, Poland
| | - Anna Bujacz
- Institute of Technical Biochemistry, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Stefanowskiego 4/10, Lodz 90-924, Poland.
| | - Paweł Mak
- Department of Analytical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7A, 30-387 Krakow, Poland; Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland
| | - Barbara Potempa
- University of Louisville School of Dentistry, Department of Oral Immunology and Infectious Diseases, 501 South Preston Street, Louisville, KY 40202, USA
| | - Tomasz Niedziela
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, Wrocław 53-114, Poland
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19
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Shah AK, Cao KAL, Choi E, Chen D, Gautier B, Nancarrow D, Whiteman DC, Saunders NA, Barbour AP, Joshi V, Hill MM. Serum Glycoprotein Biomarker Discovery and Qualification Pipeline Reveals Novel Diagnostic Biomarker Candidates for Esophageal Adenocarcinoma. Mol Cell Proteomics 2015; 14:3023-39. [PMID: 26404905 DOI: 10.1074/mcp.m115.050922] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Indexed: 12/31/2022] Open
Abstract
We report an integrated pipeline for efficient serum glycoprotein biomarker candidate discovery and qualification that may be used to facilitate cancer diagnosis and management. The discovery phase used semi-automated lectin magnetic bead array (LeMBA)-coupled tandem mass spectrometry with a dedicated data-housing and analysis pipeline; GlycoSelector (http://glycoselector.di.uq.edu.au). The qualification phase used lectin magnetic bead array-multiple reaction monitoring-mass spectrometry incorporating an interactive web-interface, Shiny mixOmics (http://mixomics-projects.di.uq.edu.au/Shiny), for univariate and multivariate statistical analysis. Relative quantitation was performed by referencing to a spiked-in glycoprotein, chicken ovalbumin. We applied this workflow to identify diagnostic biomarkers for esophageal adenocarcinoma (EAC), a life threatening malignancy with poor prognosis in the advanced setting. EAC develops from metaplastic condition Barrett's esophagus (BE). Currently diagnosis and monitoring of at-risk patients is through endoscopy and biopsy, which is expensive and requires hospital admission. Hence there is a clinical need for a noninvasive diagnostic biomarker of EAC. In total 89 patient samples from healthy controls, and patients with BE or EAC were screened in discovery and qualification stages. Of the 246 glycoforms measured in the qualification stage, 40 glycoforms (as measured by lectin affinity) qualified as candidate serum markers. The top candidate for distinguishing healthy from BE patients' group was Narcissus pseudonarcissus lectin (NPL)-reactive Apolipoprotein B-100 (p value = 0.0231; AUROC = 0.71); BE versus EAC, Aleuria aurantia lectin (AAL)-reactive complement component C9 (p value = 0.0001; AUROC = 0.85); healthy versus EAC, Erythroagglutinin Phaseolus vulgaris (EPHA)-reactive gelsolin (p value = 0.0014; AUROC = 0.80). A panel of 8 glycoforms showed an improved AUROC of 0.94 to discriminate EAC from BE. Two biomarker candidates were independently verified by lectin magnetic bead array-immunoblotting, confirming the validity of the relative quantitation approach. Thus, we have identified candidate biomarkers, which, following large-scale clinical evaluation, can be developed into diagnostic blood tests. A key feature of the pipeline is the potential for rapid translation of the candidate biomarkers to lectin-immunoassays.
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Affiliation(s)
- Alok K Shah
- From the ‡The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Kim-Anh Lê Cao
- From the ‡The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Eunju Choi
- From the ‡The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia; §School of Veterinary Science, The University of Queensland, Gatton, Queensland, Australia
| | - David Chen
- ¶School of Information and Communication Technology, Griffith University, Brisbane, Queensland, Australia
| | - Benoît Gautier
- From the ‡The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Derek Nancarrow
- ‖QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - David C Whiteman
- ‖QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Nicholas A Saunders
- From the ‡The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia
| | - Andrew P Barbour
- **School of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Virendra Joshi
- ‡‡Ochsner Health System, Gastroenterology, New Orleans, Louisiana
| | - Michelle M Hill
- From the ‡The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, Brisbane, Queensland, Australia;
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20
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Shah AK, Hill MM, Shiddiky MJA, Trau M. Electrochemical detection of glycan and protein epitopes of glycoproteins in serum. Analyst 2015; 139:5970-6. [PMID: 25267970 DOI: 10.1039/c4an00781f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Aberrant protein glycosylation is associated with a range of pathological conditions including cancer and possesses diagnostic importance. Translation of glycoprotein biomarkers will be facilitated by the development of a rapid and sensitive analytical platform that simultaneously interrogates both the glycan and protein epitopes of glycoproteins in body fluids such as serum or saliva. To this end, we developed an electrochemical biosensor based on the immobilization of a lectin on the gold electrode surface to recognize/capture a target glycan epitope conjugated to glycoproteins, followed by detection of the protein epitope using a target protein-specific antibody. Electrochemical signals are generated by label-free voltammetric or impedimetric interrogation of a ferro/ferricyanide redox couple (e.g. [Fe(CN)6](3-/4-)) on the sensing surface, where the change in voltammetric current or interfacial electron transfer resistance was measured. The detection system was demonstrated using the model glycoprotein chicken ovalbumin with Sambucus nigra agglutinin type I (SNA lectin), and exhibits femtomolar sensitivity in the background of diluted human serum. The results obtained in this proof-of-concept study demonstrate the possibility of using electrochemical detection for developing cheap point-of-care diagnostics with high specificity and sensitivity for blood glycoprotein biomarkers.
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Affiliation(s)
- Alok K Shah
- The University of Queensland Diamantina Institute, The University of Queensland, Translational Research Institute, QLD 4102, Australia.
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21
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Zhang Z, Zhang W, Bao T, Chen Z. Jacket-free stir bar sorptive extraction with bio-inspired polydopamine-functionalized immobilization of cross-linked polymer on stainless steel wire. J Chromatogr A 2015; 1407:1-10. [DOI: 10.1016/j.chroma.2015.06.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 06/11/2015] [Accepted: 06/12/2015] [Indexed: 01/15/2023]
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22
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Silva MLS. Cancer serum biomarkers based on aberrant post-translational modifications of glycoproteins: Clinical value and discovery strategies. Biochim Biophys Acta Rev Cancer 2015; 1856:165-77. [PMID: 26232626 DOI: 10.1016/j.bbcan.2015.07.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 07/28/2015] [Indexed: 12/31/2022]
Abstract
Due to the increase in life expectancy in the last decades, as well as changes in lifestyle, cancer has become one of the most common diseases both in developed and developing countries. Early detection remains the most promising approach to improve long-term survival of cancer patients and this may be achieved by efficient screening of biomarkers in biological fluids. Great efforts have been made to identify specific alterations during oncogenesis. Changes at the cellular glycosylation profiles are among such alterations. The "glycosylation machinery" of cells is affected by malignant transformation due to the altered expression of glycogens, leading to changes in glycan biosynthesis and diversity. Alterations in the post-translational modifications of proteins that occur in cancer result in the expression of antigenically distinct glycoproteins. Therefore, these aberrant and cancer-specific glycoproteins and the autoantibodies that are produced in response to their presence constitute targets for cancer biomarkers' search. Different strategies have been implemented for the discovery of cancer glycobiomarkers and are herein reviewed, along with their potentialities and limitations. Practical issues related with serum analysis are also addressed, as well as the challenges that this area faces in the near future.
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Affiliation(s)
- M Luísa S Silva
- Centre of Chemical Research, Autonomous University of Hidalgo State, Carr. Pachuca-Tulancingo km 4.5, 42184 Mineral de la Reforma, Hidalgo, México.
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23
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Ahn YH, Kim JY, Yoo JS. Quantitative mass spectrometric analysis of glycoproteins combined with enrichment methods. MASS SPECTROMETRY REVIEWS 2015; 34:148-65. [PMID: 24889823 PMCID: PMC4340049 DOI: 10.1002/mas.21428] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 11/20/2013] [Indexed: 05/12/2023]
Abstract
Mass spectrometry (MS) has been a core technology for high sensitive and high-throughput analysis of the enriched glycoproteome in aspects of quantitative assays as well as qualitative profiling of glycoproteins. Because it has been widely recognized that aberrant glycosylation in a glycoprotein may involve in progression of a certain disease, the development of efficient analysis tool for the aberrant glycoproteins is very important for deep understanding about pathological function of the glycoprotein and new biomarker development. This review first describes the protein glycosylation-targeting enrichment technologies mainly employing solid-phase extraction methods such as hydrizide-capturing, lectin-specific capturing, and affinity separation techniques based on porous graphitized carbon, hydrophilic interaction chromatography, or immobilized boronic acid. Second, MS-based quantitative analysis strategies coupled with the protein glycosylation-targeting enrichment technologies, by using a label-free MS, stable isotope-labeling, or targeted multiple reaction monitoring (MRM) MS, are summarized with recent published studies.
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Affiliation(s)
- Yeong Hee Ahn
- Division of Mass Spectrometry, Korea Basic Science InstituteCheongwon-Gun, 363-883, Republic of Korea
| | - Jin Young Kim
- Division of Mass Spectrometry, Korea Basic Science InstituteCheongwon-Gun, 363-883, Republic of Korea
| | - Jong Shin Yoo
- Division of Mass Spectrometry, Korea Basic Science InstituteCheongwon-Gun, 363-883, Republic of Korea
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Zhao M, Xie Y, Deng C, Zhang X. Recent advances in the application of core–shell structured magnetic materials for the separation and enrichment of proteins and peptides. J Chromatogr A 2014; 1357:182-93. [DOI: 10.1016/j.chroma.2014.04.078] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 04/20/2014] [Accepted: 04/22/2014] [Indexed: 12/28/2022]
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Huang BY, Yang CK, Liu CP, Liu CY. Stationary phases for the enrichment of glycoproteins and glycopeptides. Electrophoresis 2014; 35:2091-107. [PMID: 24729282 DOI: 10.1002/elps.201400034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 03/25/2014] [Accepted: 04/04/2014] [Indexed: 12/20/2022]
Abstract
The analysis of protein glycosylation is important for biomedical and biopharmaceutical research. Recent advances in LC-MS analysis have enabled the identification of glycosylation sites, the characterisation of glycan structures and the identification and quantification of glycoproteins and glycopeptides. However, this type of analysis remains challenging due to the low abundance of glycopeptides in complex protein digests, the microheterogeneity at glycosylation sites, ion suppression effects and the competition for ionisation by co-eluting peptides. Specific sample preparation is necessary for comprehensive and site-specific glycosylation analyses using MS. Therefore, researchers continue to pursue new columns to broaden their applications. The current manuscript covers recent literature published from 2008 to 2013. The stationary phases containing various chemical bonding methods or ligands immobilisation strategies on solid supports that selectively enrich N-linked or sialylated N-glycopeptides are categorised with either physical or chemical modes of binding. These categories include lectin affinity, hydrophilic interactions, boronate affinity, titanium dioxide affinity, hydrazide chemistry and other separation techniques. This review should aid in better understanding the syntheses and physicochemical properties of each type of stationary phases for enriching glycoproteins and glycopeptides.
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Affiliation(s)
- Bao-Yu Huang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
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Ruiz-May E, Hucko S, Howe KJ, Zhang S, Sherwood RW, Thannhauser TW, Rose JKC. A comparative study of lectin affinity based plant N-glycoproteome profiling using tomato fruit as a model. Mol Cell Proteomics 2014; 13:566-79. [PMID: 24198434 PMCID: PMC3916654 DOI: 10.1074/mcp.m113.028969] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 10/20/2013] [Indexed: 12/22/2022] Open
Abstract
Lectin affinity chromatography (LAC) can provide a valuable front-end enrichment strategy for the study of N-glycoproteins and has been used to characterize a broad range eukaryotic N-glycoproteomes. Moreover, studies with mammalian systems have suggested that the use of multiple lectins with different affinities can be particularly effective. A multi-lectin approach has also been reported to provide a significant benefit for the analysis of plant N-glycoproteins; however, it has yet to be determined whether certain lectins, or combinations of lectins are optimal for plant N-glycoproteome profiling; or whether specific lectins show preferential association with particular N-glycosylation sites or N-glycan structures. We describe here a comparative study of three mannose-binding lectins, concanavalin A, snowdrop lectin, and lentil lectin, to profile the N-glycoproteome of mature green stage tomato (Solanum lycopersicum) fruit pericarp. Through coupling lectin affinity chromatography with a shotgun proteomics strategy, we identified 448 putative N-glycoproteins, whereas a parallel lectin affinity chromatography plus hydrophilic interaction chromatography analysis revealed 318 putative N-glycosylation sites on 230 N-glycoproteins, of which 100 overlapped with the shotgun analysis, as well as 17 N-glycan structures. The use of multiple lectins substantially increased N-glycoproteome coverage and although there were no discernible differences in the structures of N-glycans, or the charge, isoelectric point (pI) or hydrophobicity of the glycopeptides that differentially bound to each lectin, differences were observed in the amino acid frequency at the -1 and +1 subsites of the N-glycosylation sites. We also demonstrated an alternative and complementary in planta recombinant expression strategy, followed by affinity MS analysis, to identify the putative N-glycan structures of glycoproteins whose abundance is too low to be readily determined by a shotgun approach, and/or combined with deglycosylation for predicted deamidated sites, using a xyloglucan-specific endoglucanase inhibitor protein as an example.
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Affiliation(s)
- Eliel Ruiz-May
- From the ‡Department of Plant Biology, Cornell University, Ithaca, New York 14853
| | - Simon Hucko
- §USDA-ARS, Robert W. Holley Center for Agriculture and Health, Ithaca, New York 14853
| | - Kevin J. Howe
- §USDA-ARS, Robert W. Holley Center for Agriculture and Health, Ithaca, New York 14853
| | - Sheng Zhang
- ¶Proteomics and Mass Spectrometry Facility, Institute of Biotechnology, Ithaca, New York 14853
| | - Robert W. Sherwood
- ¶Proteomics and Mass Spectrometry Facility, Institute of Biotechnology, Ithaca, New York 14853
| | | | - Jocelyn K. C. Rose
- From the ‡Department of Plant Biology, Cornell University, Ithaca, New York 14853
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Abstract
Lectins are proteins that bind to sugars with varying specificities and several have been identified that show differential binding to structurally variable glycans attached to glycoproteins. Consequently, lectin affinity chromatography represents a valuable tool for glycoproteome studies, allowing enrichment of glycoproteins in samples prior to their identification by mass spectrometry (MS). From the perspective of plant scientists, lectin enrichment has proven useful for studies of the proteomes of the secretory pathways and cell wall, due to the high proportion of constituent proteins that are glycosylated. This chapter outlines a strategy to generate samples enriched with glycoproteins from bulk plant tissues prior to further characterization by MS, or other techniques.
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Wang H, Li H, Zhang W, Wei L, Yu H, Yang P. Multiplex profiling of glycoproteins using a novel bead-based lectin array. Proteomics 2013; 14:78-86. [PMID: 24243643 DOI: 10.1002/pmic.201200544] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 10/17/2013] [Accepted: 10/23/2013] [Indexed: 01/08/2023]
Abstract
Lectin array is becoming important in profiling targeted glycan/glycoprotein, but weak interaction between lectin and glycan causes low sensitivity of the approach. This study aims to develop a bead-based lectin array for improving the sensitivity of glycosylation profiling. Lectins are chemically coupled to fluorescent dye coated microbeads, and glycan-lectin recognition is carried out three dimensionally. The performance of this platform was evaluated, and the LOD of lectin Ricinus communis agglutinin 120 (RCA120) was 50 pg/mL (1 pM) of asialofetuin, providing the bead-based lectin microarray with the highest sensitivity among the reported lectin microarrays. Furthermore, multiplexed assay was performed, which allowed the simultaneous detection of multiple carbohydrate epitopes in a single reaction vessel. The glycosylation patterns of hepatocellular carcinoma associated immunoglobulin G were analyzed, and increased (α-1,6) core fucosylation and (α-2,6) sialylation patterns were observed, which may provide significant clinical evidence for disease diagnosis.
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Affiliation(s)
- Hong Wang
- Department of Chemistry, Fudan University, Shanghai, China; Institutes of Biomedical Sciences, Fudan University, Shanghai, China; Shanghai Institute for food and drug control, Shanghai, China
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Abstract
Advancement in electrophoresis and mass spectrometry techniques along with the recent progresses in genomics, culminating in bovine and pig genome sequencing, widened the potential application of proteomics in the field of veterinary medicine. The aim of the present review is to provide an in-depth perspective about the application of proteomics to animal disease pathogenesis, as well as its utilization in veterinary diagnostics. After an overview on the various proteomic techniques that are currently applied to veterinary sciences, the article focuses on proteomic approaches to animal disease pathogenesis. Included as well are recent achievements in immunoproteomics (ie, the identifications through proteomic techniques of antigen involved in immune response) and histoproteomics (ie, the application of proteomics in tissue processed for immunohistochemistry). Finally, the article focuses on clinical proteomics (ie, the application of proteomics to the identification of new biomarkers of animal diseases).
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30
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Shah AK, Saunders NA, Barbour AP, Hill MM. Early diagnostic biomarkers for esophageal adenocarcinoma--the current state of play. Cancer Epidemiol Biomarkers Prev 2013; 22:1185-209. [PMID: 23576690 DOI: 10.1158/1055-9965.epi-12-1415] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Esophageal adenocarcinoma (EAC) is one of the two most common types of esophageal cancer with alarming increase in incidence and very poor prognosis. Aiming to detect EAC early, currently high-risk patients are monitored using an endoscopic-biopsy approach. However, this approach is prone to sampling error and interobserver variability. Diagnostic tissue biomarkers related to genomic and cell-cycle abnormalities have shown promising results, although with current technology these tests are difficult to implement in the screening of high-risk patients for early neoplastic changes. Differential miRNA profiles and aberrant protein glycosylation in tissue samples have been reported to improve performance of existing tissue-based diagnostic biomarkers. In contrast to tissue biomarkers, circulating biomarkers are more amenable to population-screening strategies, due to the ease and low cost of testing. Studies have already shown altered circulating glycans and DNA methylation in BE/EAC, whereas disease-associated changes in circulating miRNA remain to be determined. Future research should focus on identification and validation of these circulating biomarkers in large-scale trials to develop in vitro diagnostic tools to screen population at risk for EAC development.
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Affiliation(s)
- Alok Kishorkumar Shah
- The University of Queensland Diamantina Institute; and School of Medicine, The University of Queensland, Woolloongabba, Queensland, Australia
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Li Y, Zhang X, Deng C. Functionalized magnetic nanoparticles for sample preparation in proteomics and peptidomics analysis. Chem Soc Rev 2013; 42:8517-39. [DOI: 10.1039/c3cs60156k] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Lazar IM, Lee W, Lazar AC. Glycoproteomics on the rise: established methods, advanced techniques, sophisticated biological applications. Electrophoresis 2012; 34:113-25. [PMID: 23161435 DOI: 10.1002/elps.201200445] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2012] [Revised: 10/07/2012] [Accepted: 10/07/2012] [Indexed: 02/05/2023]
Abstract
Glycosylation is the most complex form of protein PTMs. Affected proteins may carry dozens of glycosylation sites with tens to hundreds of glycan residues attached to every site. Glycosylated proteins have many important functions in biology, from cellular to organismal levels, being involved in cell-cell signaling, cell adhesion, immune response, host-pathogen interactions, and development and growth. Glycosylation, however, expands the biological functional diversity of proteins at the expense of a tremendous increase in structural heterogeneity. Aberrant glycosylation of cell surface proteins, as well as their detectable fingerprint in plasma samples, has been associated with cancer, inflammatory and degenerative diseases, and congenital disorders of glycosylation. Therefore, there are on-going efforts directed toward developing new technologies and approaches for glycan sequencing and high-throughput analysis of glycosylated proteins in complex samples with simultaneous characterization of both the protein and glycan moieties. This work is aimed primarily at pinpointing the challenges associated with the large-scale analysis of glycoproteins and the latest developments in glycoproteomic research, with focus on recent advancements (2011-2012) in microcolumn separations and MS detection.
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Affiliation(s)
- Iulia M Lazar
- Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
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