1
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Diederiks NM, van der Burgt YEM, Ruhaak LR, Cobbaert CM. Developing an SI-traceable Lp(a) reference measurement system: a pilgrimage to selective and accurate apo(a) quantification. Crit Rev Clin Lab Sci 2023; 60:483-501. [PMID: 37128734 DOI: 10.1080/10408363.2023.2199353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 03/14/2023] [Accepted: 04/01/2023] [Indexed: 05/03/2023]
Abstract
In the past decade a remarkable rebirth of serum/plasma lipoprotein(a) (Lp(a)) as an independent risk factor of cardiovascular disease (CVD) occurred. Updated evidence for a causal continuous association in different ethnic groups between Lp(a) concentrations and cardiovascular outcomes has been published in the latest European Atherosclerosis Society (EAS) Lp(a) consensus statement. Interest in measuring Lp(a) at least once in a person's lifetime moreover originates from the development of promising new Lp(a) lowering drugs. Accurate and clinically effective Lp(a) tests are of key importance for the timely detection of high-risk individuals and for future evaluation of the therapeutic effects of Lp(a) lowering medication. To this end, it is necessary to improve the performance and standardization of existing Lp(a) tests, as is also noted in the Lp(a) consensus statement. Consequently, a state-of-the-art internationally endorsed reference measurement system (RMS) must be in place that allows for performance evaluation of Lp(a) field tests in order to certify their validity and accuracy. An ELISA-based RMS from Northwest Lipid Research Laboratory (University of Washington, Seattle, USA) has been available since the 1990s. A next-generation apo(a)/Lp(a) RMS is now being developed by a working group from the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC). The envisioned apo(a) RMS is based on the direct measurement of selected proteotypic fragments generated after proteolytic digestion using quantitative protein mass spectrometry (MS). The choice for an MS-based RMS enables selective measurement of the proteotypic peptides and is by design apo(a) isoform insensitive. Clearly, the equimolar conversion of apo(a) into the surrogate peptide measurands is required to obtain accurate Lp(a) results. The completeness of proteolysis under reaction conditions from the candidate reference measurement procedure (RMP) has been demonstrated for the quantifying apo(a) peptides. Currently, the candidate apo(a) RMP is endorsed by the IFCC and recommendations for suitable secondary reference materials have been made in a recent commutability study paper. Ongoing efforts toward a complete apo(a) RMS that is listed by the Joint Committee on Traceability in Laboratory Medicine (JCTLM) are focused on the peptide-based calibration and the establishment of a network of calibration laboratories running the apo(a) RMS in a harmonized way. Once completed, it will be the holy grail for evaluation and certification of Lp(a) field methods.
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Affiliation(s)
- Nina M Diederiks
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Leiden, ZA, The Netherlands
| | - Yuri E M van der Burgt
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Leiden, ZA, The Netherlands
| | - L Renee Ruhaak
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Leiden, ZA, The Netherlands
| | - Christa M Cobbaert
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Leiden, ZA, The Netherlands
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2
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Moran AB, Elgood-Hunt G, van der Burgt YEM, Wuhrer M, Mesker WE, Tollenaar RAEM, Spencer DIR, Lageveen-Kammeijer GSM. Serum N-Glycosylation RPLC-FD-MS Assay to Assess Colorectal Cancer Surgical Interventions. Biomolecules 2023; 13:896. [PMID: 37371476 DOI: 10.3390/biom13060896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/16/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023] Open
Abstract
A newly developed analytical strategy was applied to profile the total serum N-glycome of 64 colorectal cancer (CRC) patients before and after surgical intervention. In this cohort, it was previously found that serum N-glycome alterations in CRC were associated with patient survival. Here, fluorescent labeling of serum N-glycans was applied using procainamide and followed by sialic acid derivatization specific for α2,6- and α2,3-linkage types via ethyl esterification and amidation, respectively. This strategy allowed efficient separation of specific positional isomers on reversed-phase liquid chromatography-fluorescence detection-mass spectrometry (RPLC-FD-MS) and complemented the previous glycomics data based on matrix-assisted laser desorption/ionization (MALDI)-MS that did not include such separations. The results from comparing pre-operative CRC to post-operative samples were in agreement with studies that identified a decrease in di-antennary structures with core fucosylation and an increase in sialylated tri- and tetra-antennary N-glycans in CRC patient sera. Pre-operative abundances of N-glycans showed good performance for the classification of adenocarcinoma and led to the revisit of the previous MALDI-MS dataset with regard to histological and clinical data. This strategy has the potential to monitor patient profiles before, during, and after clinical events such as treatment, therapy, or surgery and should also be further explored.
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Affiliation(s)
- Alan B Moran
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
- Ludger Ltd., Culham Science Centre, Abingdon OX14 3EB, UK
| | | | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Wilma E Mesker
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Rob A E M Tollenaar
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | | | - Guinevere S M Lageveen-Kammeijer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
- Department of Analytical Biochemistry, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV Groningen, The Netherlands
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3
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Forcisi S, Moritz F, Thompson CJ, Kanawati B, Uhl J, Afonso C, Bader CD, Barsch A, Boughton BA, Chu RK, Ferey J, Fernandez-Lima F, Guéguen C, Heintz D, Gomez-Hernandez M, Jang KS, Kessler N, Mangal V, Müller R, Nakabayashi R, Nicol E, Nicolardi S, Palmblad M, Paša-Tolić L, Porter J, Schmitz-Afonso I, Seo JB, Sommella E, van der Burgt YEM, Villette C, Witt M, Wittrig A, Wolff JJ, Easterling ML, Laukien FH, Schmitt-Kopplin P. Large-Scale Interlaboratory DI-FT-ICR MS Comparability Study Employing Various Systems. J Am Soc Mass Spectrom 2022; 33:2203-2214. [PMID: 36371691 PMCID: PMC9732881 DOI: 10.1021/jasms.2c00082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Ultrahigh resolution mass spectrometry (UHR-MS) coupled with direct infusion (DI) electrospray ionization offers a fast solution for accurate untargeted profiling. Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometers have been shown to produce a wealth of insights into complex chemical systems because they enable unambiguous molecular formula assignment even if the vast majority of signals is of unknown identity. Interlaboratory comparisons are required to apply this type of instrumentation in quality control (for food industry or pharmaceuticals), large-scale environmental studies, or clinical diagnostics. Extended comparisons employing different FT-ICR MS instruments with qualitative direct infusion analysis are scarce since the majority of detected compounds cannot be quantified. The extent to which observations can be reproduced by different laboratories remains unknown. We set up a preliminary study which encompassed a set of 17 laboratories around the globe, diverse in instrumental characteristics and applications, to analyze the same sets of extracts from commercially available standard human blood plasma and Standard Reference Material (SRM) for blood plasma (SRM1950), which were delivered at different dilutions or spiked with different concentrations of pesticides. The aim of this study was to assess the extent to which the outputs of differently tuned FT-ICR mass spectrometers, with different technical specifications, are comparable for setting the frames of a future DI-FT-ICR MS ring trial. We concluded that a cluster of five laboratories, with diverse instrumental characteristics, showed comparable and representative performance across all experiments, setting a reference to be used in a future ring trial on blood plasma.
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Affiliation(s)
- Sara Forcisi
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Franco Moritz
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | | | - Basem Kanawati
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Jenny Uhl
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Carlos Afonso
- COBRA, UMR 6014 et FR 3038, INSA de Rouen, CNRS, IRCOF, Normandie Université, Université de Rouen, 76130 Cedex Mont Saint Aignan, France
| | - Chantal D Bader
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research, Saarland University Campus, 66123 Saarbrücken, Germany and Department of Pharmacy, Saarland University, 66123 Saarbrücken, Germany
| | - Aiko Barsch
- Bruker Daltonik GmbH, Fahrenheitstrasse 4, 28359 Bremen, Germany
| | - Berin A Boughton
- Metabolomics Australia, School of BioSciences, University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Rosalie K Chu
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Justine Ferey
- COBRA, UMR 6014 et FR 3038, INSA de Rouen, CNRS, IRCOF, Normandie Université, Université de Rouen, 76130 Cedex Mont Saint Aignan, France
| | - Francisco Fernandez-Lima
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW Eighth Street, AHC4-233, Miami, Florida 33199, United States
- Biomolecular Sciences Institute, Florida International University, 11200 Eighth Street, AHC4-211, Miami, Florida 33199, United States
| | - Céline Guéguen
- Chemistry Department, Trent University, 1600 West Bank Drive, Peterborough, ON K9J 7B8, Canada
| | - Dimitri Heintz
- Plant Imaging and Mass Spectrometry (PIMS), Institut de Biologie Moléculaire des Plantes, CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg, France
| | - Mario Gomez-Hernandez
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW Eighth Street, AHC4-233, Miami, Florida 33199, United States
- Biomolecular Sciences Institute, Florida International University, 11200 Eighth Street, AHC4-211, Miami, Florida 33199, United States
| | - Kyoung-Soon Jang
- Bio-Chemical Analysis Team, Korea Basic Science Institute, Cheongju 28119, South Korea
| | - Nikolas Kessler
- Bruker Daltonik GmbH, Fahrenheitstrasse 4, 28359 Bremen, Germany
| | - Vaughn Mangal
- Chemistry Department, Trent University, 1600 West Bank Drive, Peterborough, ON K9J 7B8, Canada
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research, Saarland University Campus, 66123 Saarbrücken, Germany and Department of Pharmacy, Saarland University, 66123 Saarbrücken, Germany
| | - Ryo Nakabayashi
- Metabolomics Research Group, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Edith Nicol
- Laboratoire de Chimie Moléculaire (LCM), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center Leiden, 2333 ZC Leiden, The Netherlands
| | - Magnus Palmblad
- Center for Proteomics and Metabolomics, Leiden University Medical Center Leiden, 2333 ZC Leiden, The Netherlands
| | - Ljiljana Paša-Tolić
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jacob Porter
- Department of Chemistry and Biochemistry, Florida International University, 11200 SW Eighth Street, AHC4-233, Miami, Florida 33199, United States
- Biomolecular Sciences Institute, Florida International University, 11200 Eighth Street, AHC4-211, Miami, Florida 33199, United States
| | - Isabelle Schmitz-Afonso
- COBRA, UMR 6014 et FR 3038, INSA de Rouen, CNRS, IRCOF, Normandie Université, Université de Rouen, 76130 Cedex Mont Saint Aignan, France
| | - Jong Bok Seo
- Seoul Center, Korea Basic Science Institute, 145, Anam-Ro, Seongbuk-Gu 02841, Seoul, South Korea
| | - Eduardo Sommella
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center Leiden, 2333 ZC Leiden, The Netherlands
| | - Claire Villette
- Plant Imaging and Mass Spectrometry (PIMS), Institut de Biologie Moléculaire des Plantes, CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084 Strasbourg, France
| | - Matthias Witt
- Bruker Daltonik GmbH, Fahrenheitstrasse 4, 28359 Bremen, Germany
| | - Ashley Wittrig
- ExxonMobil Research and Engineering Company, 1545 Route 22 East, Clinton, New Jersey 08869, United States
| | - Jeremy J Wolff
- Bruker Daltonics Inc., Billerica, Massachusetts 01821, United States
| | | | - Frank H Laukien
- Bruker Daltonics Inc., Billerica, Massachusetts 01821, United States
- Department of Chemistry & Chemical Biology, Cambridge, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Philippe Schmitt-Kopplin
- Research Unit Analytical BioGeoChemistry, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Analytical Food Chemistry, Technical University of Munich, 85354 Freising, Germany
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4
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Nicolardi S, Joseph AA, Zhu Q, Shen Z, Pardo-Vargas A, Chiodo F, Molinaro A, Silipo A, van der Burgt YEM, Yu B, Seeberger PH, Wuhrer M. Analysis of Synthetic Monodisperse Polysaccharides by Wide Mass Range Ultrahigh-Resolution MALDI Mass Spectrometry. Anal Chem 2021; 93:4666-4675. [PMID: 33667082 PMCID: PMC8034773 DOI: 10.1021/acs.analchem.1c00239] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 02/19/2021] [Indexed: 12/13/2022]
Abstract
Carbohydrates, such as oligo- and polysaccharides, are highly abundant biopolymers that are involved in numerous processes. The study of their structure and functions is commonly based on a material that is isolated from complex natural sources. However, a more precise analysis requires pure compounds with well-defined structures that can be obtained from chemical or enzymatic syntheses. Novel synthetic strategies have increased the accessibility of larger monodisperse polysaccharides, posing a challenge to the analytical methods used for their molecular characterization. Here, we present wide mass range ultrahigh-resolution matrix-assisted laser desorption/ionization (MALDI) Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS) as a powerful platform for the analysis of synthetic oligo- and polysaccharides. Synthetic carbohydrates 16-, 64-, 100-, and 151-mers were mass analyzed and characterized by MALDI in-source decay FT-ICR MS. Detection of fragment ions generated from glycosidic bond cleavage (or cross-ring cleavage) provided information of the monosaccharide content and the linkage type, allowing for the corroboration of the carbohydrate compositions and structures.
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Affiliation(s)
- Simone Nicolardi
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, Leiden 2333 ZA, The Netherlands
| | - A. Abragam Joseph
- Department
of Biomolecular Systems, Max-Planck-Institute
of Colloids and Interfaces, 14476 Potsdam, Germany
| | - Qian Zhu
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Center
for Excellence in Molecular Synthesis, Shanghai Institute of Organic
Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Zhengnan Shen
- School
of Physical Science and Technology, ShanghaiTech
University, 393 Huaxia Middle Road, Shanghai 201210, China
| | - Alonso Pardo-Vargas
- Department
of Biomolecular Systems, Max-Planck-Institute
of Colloids and Interfaces, 14476 Potsdam, Germany
- Institute
of Chemistry and Biochemistry, Freie Universität
Berlin, Arnimallee 22, Berlin 14195, Germany
| | - Fabrizio Chiodo
- Institute
of Biomolecular Chemistry (ICB), Italian
National Research Council (CNR), Via Campi Flegrei, 34, Pozzuoli, Napoli 80078, Italy
- Amsterdam
UMC-Locatie VUMC, Molecular Cell Biology and Immunology, De Boelelaan 1108, Amsterdam 1081 HZ, The Netherlands
| | - Antonio Molinaro
- Department
of Chemical Sciences, University of Naples
Federico II, Via Cintia 4, Napoli 80126, Italy
| | - Alba Silipo
- Department
of Chemical Sciences, University of Naples
Federico II, Via Cintia 4, Napoli 80126, Italy
| | - Yuri E. M. van der Burgt
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, Leiden 2333 ZA, The Netherlands
| | - Biao Yu
- State
Key Laboratory of Bioorganic and Natural Products Chemistry, Center
for Excellence in Molecular Synthesis, Shanghai Institute of Organic
Chemistry, University of Chinese Academy
of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School
of Chemistry and Materials Science, Hangzhou Institute for Advanced
Study, University of Chinese Academy of
Sciences, 1 Sub-lane
Xiangshan, Hangzhou 310024, China
| | - Peter H. Seeberger
- Department
of Biomolecular Systems, Max-Planck-Institute
of Colloids and Interfaces, 14476 Potsdam, Germany
- Institute
of Chemistry and Biochemistry, Freie Universität
Berlin, Arnimallee 22, Berlin 14195, Germany
| | - Manfred Wuhrer
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, Leiden 2333 ZA, The Netherlands
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5
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Smit NPM, Ruhaak LR, Romijn FPHTM, Pieterse MM, van der Burgt YEM, Cobbaert CM. The Time Has Come for Quantitative Protein Mass Spectrometry Tests That Target Unmet Clinical Needs. J Am Soc Mass Spectrom 2021; 32:636-647. [PMID: 33522792 PMCID: PMC7944566 DOI: 10.1021/jasms.0c00379] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 12/22/2020] [Accepted: 01/19/2021] [Indexed: 05/04/2023]
Abstract
Protein mass spectrometry (MS) is an enabling technology that is ideally suited for precision diagnostics. In contrast to immunoassays with indirect readouts, MS quantifications are multiplexed and include identification of proteoforms in a direct manner. Although widely used for routine measurements of drugs and metabolites, the number of clinical MS-based protein applications is limited. In this paper, we share our experience and aim to take away the concerns that have kept laboratory medicine from implementing quantitative protein MS. To ensure added value of new medical tests and guarantee accurate test results, five key elements of test evaluation have been established by a working group within the European Federation for Clinical Chemistry and Laboratory Medicine. Moreover, it is emphasized to identify clinical gaps in the contemporary clinical pathways before test development is started. We demonstrate that quantitative protein MS tests that provide an additional layer of clinical information have robust performance and meet long-term desirable analytical performance specifications as exemplified by our own experience. Yet, the adoption of quantitative protein MS tests into medical laboratories is seriously hampered due to its complexity, lack of robotization and high initial investment costs. Successful and widespread implementation in medical laboratories requires uptake and automation of this next generation protein technology by the In-Vitro Diagnostics industry. Also, training curricula of lab workers and lab specialists should include education on enabling technologies for transitioning to precision medicine by quantitative protein MS tests.
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Affiliation(s)
- Nico P. M. Smit
- Department of Clinical Chemistry and
Laboratory Medicine, Leiden University Medical
Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - L. Renee Ruhaak
- Department of Clinical Chemistry and
Laboratory Medicine, Leiden University Medical
Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Fred P. H. T. M. Romijn
- Department of Clinical Chemistry and
Laboratory Medicine, Leiden University Medical
Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Mervin M. Pieterse
- Department of Clinical Chemistry and
Laboratory Medicine, Leiden University Medical
Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Yuri E. M. van der Burgt
- Department of Clinical Chemistry and
Laboratory Medicine, Leiden University Medical
Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Christa M. Cobbaert
- Department of Clinical Chemistry and
Laboratory Medicine, Leiden University Medical
Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
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6
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Gstöttner C, Reusch D, Haberger M, Dragan I, Van Veelen P, Kilgour DPA, Tsybin YO, van der Burgt YEM, Wuhrer M, Nicolardi S. Monitoring glycation levels of a bispecific monoclonal antibody at subunit level by ultrahigh-resolution MALDI FT-ICR mass spectrometry. MAbs 2021; 12:1682403. [PMID: 31630606 PMCID: PMC6927770 DOI: 10.1080/19420862.2019.1682403] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Bispecific monoclonal antibodies (BsAbs) are engineered proteins with multiple functionalities and properties. The "bi-specificity" of these complex biopharmaceuticals is a key characteristic for the development of novel and more effective therapeutic strategies. The high structural complexity of BsAbs poses a challenge to the analytical methods needed for their characterization. Modifications of the BsAb structure, resulting from enzymatic and non-enzymatic processes, further complicate the analysis. An important example of the latter type of modification is glycation, which can occur in the manufacturing process, during storage in the formulation or in vivo after application of the drug. Glycation affects the structure, function, and stability of monoclonal antibodies, and consequently, a detailed analysis of glycation levels is required. Mass spectrometry (MS) plays a key role in the structural characterization of monoclonal antibodies and top-down, middle-up and middle-down MS approaches are increasingly used for the analysis of modifications. Here, we apply a novel middle-up strategy, based on IdeS digestion and matrix-assisted laser desorption ionization (MALDI) Fourier transform ion cyclotron resonance (FT-ICR) MS, to analyze all six different BsAb subunits in a single high-resolution mass spectrum, namely two light chains, two half fragment crystallizable regions and two Fd' regions, thus avoiding upfront chromatography. This method was used to monitor glycation changes during a 168 h forced-glycation experiment. In addition, hot spot glycation sites were localized using top-down and middle-down MALDI-in-source decay FT-ICR MS, which provided complementary information compared to standard bottom-up MS.
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Affiliation(s)
- Christoph Gstöttner
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, The Netherlands
| | - Dietmar Reusch
- Pharma Technical Development Penzberg, Roche Diagnostics GmbH, Penzberg, Germany
| | - Markus Haberger
- Pharma Technical Development Penzberg, Roche Diagnostics GmbH, Penzberg, Germany
| | - Irina Dragan
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, The Netherlands
| | - Peter Van Veelen
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, The Netherlands
| | - David P A Kilgour
- Department of Chemistry, Nottingham Trent University, Nottingham, U.K
| | - Yury O Tsybin
- Spectroswiss, EPFL Innovation Park, Lausanne, Switzerland
| | - Yuri E M van der Burgt
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, The Netherlands
| | - Manfred Wuhrer
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, The Netherlands
| | - Simone Nicolardi
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, The Netherlands
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7
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Nicolardi S, Kilgour DPA, van der Burgt YEM, Wuhrer M. Improved N- and C-Terminal Sequencing of Proteins by Combining Positive and Negative Ion MALDI In-Source Decay Mass Spectrometry. Anal Chem 2020; 92:12429-12436. [PMID: 32803948 PMCID: PMC7498143 DOI: 10.1021/acs.analchem.0c02198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 08/17/2020] [Indexed: 01/10/2023]
Abstract
The development of various ionization and fragmentation techniques has been of key importance for establishing mass spectrometry (MS) as a powerful tool for protein characterization. One example of this is matrix-assisted laser desorption/ionization (MALDI) combined with in-source decay (ISD) fragmentation that allows mapping of N- and C-terminal regions of large proteins without the need for proteolysis. Positive ion mode ISD fragments are commonly assigned in the mass region above m/z 1000, while MALDI matrix ions generally hamper the detection of smaller singly charged fragments. The ultrahigh resolving power provided by Fourier transform ion cyclotron resonance (FT-ICR) MS partially overcomes this limitation, but to further increase the detection of smaller fragments we have revisited the application of negative ion mode MALDI-ISD and found good coverage of the peptide chain termini starting from c'2 and z'2 fragment ions. For the first time, we demonstrate that the combination of negative and positive ion MALDI FT-ICR MS is a useful tool to improve the characterization of mAbs. The different specificities of the two ion modes allowed us to selectively cover the sequence of the light and heavy chains of mAbs at increased sensitivity. A comprehensive evaluation of positive and negative ion mode MALDI-ISD FT-ICR MS in the m/z range 46-13 500 showed an increased sequence coverage for three standard proteins, namely, myoglobin, SiLuLite mAb, and NIST mAb. The data obtained in the two ion modes were, in part, complementary.
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Affiliation(s)
- Simone Nicolardi
- Center for Proteomics & Metabolomics, Leiden University Medical Center, Albinusdreef 2, Leiden 2333 ZA, The Netherlands
| | - David P A Kilgour
- Department of Chemistry, Nottingham Trent University, Nottingham NG11 0JN, U.K
| | - Yuri E M van der Burgt
- Center for Proteomics & Metabolomics, Leiden University Medical Center, Albinusdreef 2, Leiden 2333 ZA, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics & Metabolomics, Leiden University Medical Center, Albinusdreef 2, Leiden 2333 ZA, The Netherlands
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8
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Vreeker GCM, Hanna-Sawires RG, Mohammed Y, Bladergroen MR, Nicolardi S, Dotz V, Nouta J, Bonsing BA, Mesker WE, van der Burgt YEM, Wuhrer M, Tollenaar RAEM. Serum N-Glycome analysis reveals pancreatic cancer disease signatures. Cancer Med 2020; 9:8519-8529. [PMID: 32898301 PMCID: PMC7666731 DOI: 10.1002/cam4.3439] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 07/08/2020] [Accepted: 08/16/2020] [Indexed: 12/13/2022] Open
Abstract
Background &Aims Pancreatic ductal adenocarcinoma (PDAC) is an aggressive cancer type with loco‐regional spread that makes the tumor surgically unresectable. Novel diagnostic tools are needed to improve detection of PDAC and increase patient survival. In this study we explore serum protein N‐glycan profiles from PDAC patients with regard to their applicability to serve as a disease biomarker panel. Methods Total serum N‐glycome analysis was applied to a discovery set (86 PDAC cases/84 controls) followed by independent validation (26 cases/26 controls) using in‐house collected serum specimens. Protein N‐glycan profiles were obtained using ultrahigh resolution mass spectrometry and included linkage‐specific sialic acid information. N‐glycans were relatively quantified and case‐control classification performance was evaluated based on glycosylation traits such as branching, fucosylation, and sialylation. Results In PDAC patients a higher level of branching (OR 6.19, P‐value 9.21 × 10−11) and (antenna)fucosylation (OR 13.27, P‐value 2.31 × 10−9) of N‐glycans was found. Furthermore, the ratio of α2,6‐ vs α2,3‐linked sialylation was higher in patients compared to healthy controls. A classification model built with three glycosylation traits was used for discovery (AUC 0.88) and independent validation (AUC 0.81), with sensitivity and specificity values of 0.85 and 0.71 for the discovery set and 0.75 and 0.72 for the validation set. Conclusion Serum N‐glycome analysis revealed glycosylation differences that allow classification of PDAC patients from healthy controls. It was demonstrated that glycosylation traits rather than single N‐glycan structures obtained in this clinical glycomics study can serve as a basis for further development of a blood‐based diagnostic test.
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Affiliation(s)
- Gerda C M Vreeker
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands.,Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Yassene Mohammed
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Marco R Bladergroen
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Simone Nicolardi
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands.,Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Viktoria Dotz
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Jan Nouta
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Bert A Bonsing
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - Wilma E Mesker
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Rob A E M Tollenaar
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands
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9
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Srzentić K, Fornelli L, Tsybin YO, Loo JA, Seckler H, Agar JN, Anderson LC, Bai DL, Beck A, Brodbelt JS, van der Burgt YEM, Chamot-Rooke J, Chatterjee S, Chen Y, Clarke DJ, Danis PO, Diedrich JK, D'Ippolito RA, Dupré M, Gasilova N, Ge Y, Goo YA, Goodlett DR, Greer S, Haselmann KF, He L, Hendrickson CL, Hinkle JD, Holt MV, Hughes S, Hunt DF, Kelleher NL, Kozhinov AN, Lin Z, Malosse C, Marshall AG, Menin L, Millikin RJ, Nagornov KO, Nicolardi S, Paša-Tolić L, Pengelley S, Quebbemann NR, Resemann A, Sandoval W, Sarin R, Schmitt ND, Shabanowitz J, Shaw JB, Shortreed MR, Smith LM, Sobott F, Suckau D, Toby T, Weisbrod CR, Wildburger NC, Yates JR, Yoon SH, Young NL, Zhou M. Interlaboratory Study for Characterizing Monoclonal Antibodies by Top-Down and Middle-Down Mass Spectrometry. J Am Soc Mass Spectrom 2020; 31:1783-1802. [PMID: 32812765 PMCID: PMC7539639 DOI: 10.1021/jasms.0c00036] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The Consortium for Top-Down Proteomics (www.topdownproteomics.org) launched the present study to assess the current state of top-down mass spectrometry (TD MS) and middle-down mass spectrometry (MD MS) for characterizing monoclonal antibody (mAb) primary structures, including their modifications. To meet the needs of the rapidly growing therapeutic antibody market, it is important to develop analytical strategies to characterize the heterogeneity of a therapeutic product's primary structure accurately and reproducibly. The major objective of the present study is to determine whether current TD/MD MS technologies and protocols can add value to the more commonly employed bottom-up (BU) approaches with regard to confirming protein integrity, sequencing variable domains, avoiding artifacts, and revealing modifications and their locations. We also aim to gather information on the common TD/MD MS methods and practices in the field. A panel of three mAbs was selected and centrally provided to 20 laboratories worldwide for the analysis: Sigma mAb standard (SiLuLite), NIST mAb standard, and the therapeutic mAb Herceptin (trastuzumab). Various MS instrument platforms and ion dissociation techniques were employed. The present study confirms that TD/MD MS tools are available in laboratories worldwide and provide complementary information to the BU approach that can be crucial for comprehensive mAb characterization. The current limitations, as well as possible solutions to overcome them, are also outlined. A primary limitation revealed by the results of the present study is that the expert knowledge in both experiment and data analysis is indispensable to practice TD/MD MS.
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Affiliation(s)
- Kristina Srzentić
- Northwestern University, Evanston, Illinois 60208-0001, United States
| | - Luca Fornelli
- Northwestern University, Evanston, Illinois 60208-0001, United States
| | - Yury O Tsybin
- Spectroswiss, EPFL Innovation Park, Building I, 1015 Lausanne, Switzerland
| | - Joseph A Loo
- University of California-Los Angeles, Los Angeles, California 90095, United States
| | - Henrique Seckler
- Northwestern University, Evanston, Illinois 60208-0001, United States
| | - Jeffrey N Agar
- Northeastern University, Boston, Massachusetts 02115, United States
| | - Lissa C Anderson
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Dina L Bai
- University of Virginia, Charlottesville, Virginia 22901, United States
| | - Alain Beck
- Centre d'immunologie Pierre Fabre, 74160 Saint-Julien-en-Genevois, France
| | | | | | | | | | - Yunqiu Chen
- Biogen, Inc., Cambridge, Massachusetts 02142-1031, United States
| | - David J Clarke
- The University of Edinburgh, EH9 3FJ Edinburgh, United Kingdom
| | - Paul O Danis
- Consortium for Top-Down Proteomics, Cambridge, Massachusetts 02142, United States
| | - Jolene K Diedrich
- The Scripps Research Institute, La Jolla, California 92037, United States
| | | | | | - Natalia Gasilova
- Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Ying Ge
- University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Young Ah Goo
- University of Maryland, Baltimore, Maryland 21201, United States
| | - David R Goodlett
- University of Maryland, Baltimore, Maryland 21201, United States
| | - Sylvester Greer
- University of Texas at Austin, Austin, Texas 78712-1224, United States
| | | | - Lidong He
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | | | - Joshua D Hinkle
- University of Virginia, Charlottesville, Virginia 22901, United States
| | - Matthew V Holt
- Baylor College of Medicine, Houston, Texas 77030-3411, United States
| | - Sam Hughes
- The University of Edinburgh, EH9 3FJ Edinburgh, United Kingdom
| | - Donald F Hunt
- University of Virginia, Charlottesville, Virginia 22901, United States
| | - Neil L Kelleher
- Northwestern University, Evanston, Illinois 60208-0001, United States
| | - Anton N Kozhinov
- Spectroswiss, EPFL Innovation Park, Building I, 1015 Lausanne, Switzerland
| | - Ziqing Lin
- University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | | | - Alan G Marshall
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
- Florida State University, Tallahassee, Florida 32310-4005, United States
| | - Laure Menin
- Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Robert J Millikin
- University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | | | - Simone Nicolardi
- Leiden University Medical Centre, 2300 RC Leiden, The Netherlands
| | - Ljiljana Paša-Tolić
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | | | - Neil R Quebbemann
- University of California-Los Angeles, Los Angeles, California 90095, United States
| | | | - Wendy Sandoval
- Genentech, Inc., South San Francisco, California 94080-4990, United States
| | - Richa Sarin
- Biogen, Inc., Cambridge, Massachusetts 02142-1031, United States
| | | | | | - Jared B Shaw
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | | | - Lloyd M Smith
- University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Frank Sobott
- University of Antwerp, 2000 Antwerp, Belgium
- University of Leeds, LS2 9JT Leeds, United Kingdom
| | | | - Timothy Toby
- Northwestern University, Evanston, Illinois 60208-0001, United States
| | - Chad R Weisbrod
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Norelle C Wildburger
- Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - John R Yates
- The Scripps Research Institute, La Jolla, California 92037, United States
| | - Sung Hwan Yoon
- University of Maryland, Baltimore, Maryland 21201, United States
| | - Nicolas L Young
- Baylor College of Medicine, Houston, Texas 77030-3411, United States
| | - Mowei Zhou
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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10
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Nicolardi S, Kilgour DPA, Dolezal N, Drijfhout JW, Wuhrer M, van der Burgt YEM. Evaluation of Sibling and Twin Fragment Ions Improves the Structural Characterization of Proteins by Top-Down MALDI In-Source Decay Mass Spectrometry. Anal Chem 2020; 92:5871-5881. [PMID: 32212639 PMCID: PMC7178258 DOI: 10.1021/acs.analchem.9b05683] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
![]()
Comprehensive determination
of primary sequence and identification
of post-translational modifications (PTMs) are key elements in protein
structural analysis. Various mass spectrometry (MS) based fragmentation
techniques are powerful approaches for mapping both the amino acid
sequence and PTMs; one of these techniques is matrix-assisted laser
desorption/ionization (MALDI), combined with in-source decay (ISD)
fragmentation and Fourier-transform ion cyclotron resonance (FT-ICR)
MS. MALDI-ISD MS protein analysis involves only minimal sample preparation
and does not require spectral deconvolution. The resulting MALDI-ISD
MS data is complementary to electrospray ionization-based MS/MS sequencing
readouts, providing knowledge on the types of fragment ions is available.
In this study, we evaluate the isotopic distributions of z′ ions in protein top-down MALDI-ISD FT-ICR mass spectra and
show why these distributions can deviate from theoretical profiles
as a result of co-occurring and isomeric z and y-NH3 ions. Two synthetic peptides, containing
either normal or deuterated alanine residues, were used to confirm
the presence and unravel the identity of isomeric z and y-NH3 fragment ions (“twins”).
Furthermore, two reducing MALDI matrices, namely 1,5-diaminonaphthalene
and N-phenyl-p-phenylenediamine
were applied that yield ISD mass spectra with different fragment ion
distributions. This study demonstrates that the relative abundance
of isomeric z and y-NH3 ions requires consideration for accurate and confident assignments
of z′ ions in MALDI-ISD FT-ICR mass spectra.
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Affiliation(s)
- Simone Nicolardi
- Center for Proteomics & Metabolomics, Leiden University Medical Center, Leiden 2333, ZA, The Netherlands
| | - David P A Kilgour
- Department of Chemistry, Nottingham Trent University, Nottingham NG11 0JN, United Kingdom
| | - Natasja Dolezal
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden 2333, ZA, The Netherlands
| | - Jan W Drijfhout
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden 2333, ZA, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics & Metabolomics, Leiden University Medical Center, Leiden 2333, ZA, The Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics & Metabolomics, Leiden University Medical Center, Leiden 2333, ZA, The Netherlands
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11
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van der Burgt YEM, Siliakus KM, Cobbaert CM, Ruhaak LR. HILIC-MRM-MS for Linkage-Specific Separation of Sialylated Glycopeptides to Quantify Prostate-Specific Antigen Proteoforms. J Proteome Res 2020; 19:2708-2716. [PMID: 32142289 PMCID: PMC8280738 DOI: 10.1021/acs.jproteome.0c00050] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
![]()
Elevated serum prostate-specific
antigen (PSA) levels in body fluids
may indicate prostate cancer (PCa), but it is noted that the clinical
performance is rather poor. Specificity and sensitivity values of
20 and 94% at a cutoff value of 4.1 ng/mL, respectively, result in
overdiagnosis and unnecessary interventions. Previous exploratory
studies have indicated that the glycosylation of PSA potentially leads
to improved PCa diagnosis based on qualitative analyses. However,
the applied methods are not suited for a quantitative evaluation or
implementation in a medical laboratory. Therefore, in this proof-of-principle
study, we have evaluated the use of hydrophilic interaction liquid
chromatography (HILIC) in combination with targeted quantitative mass
spectrometry for the sialic acid linkage-specific analysis of PSA
glyco-proteoforms based on either trypsin or ArgC peptides. The efficiency
of PSA proteolysis was optimized as well as the glycopeptide separation
conditions (buffer type, strength, and pH). The HILIC-based analysis
of PSA glyco-proteoforms presented here has the potential for the
clinical validation of patient cohorts. The method shows the feasibility
of the use of a HILIC stationary phase for the separation of isomeric
glycopeptides to detect specific glyco-proteoforms. This is the first
step toward the development and evaluation of PSA glyco-proteoforms
for use in a clinical chemistry setting aiming for improved PCa diagnosis
or screening.
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Affiliation(s)
- Yuri E M van der Burgt
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Kasper M Siliakus
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Christa M Cobbaert
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - L Renee Ruhaak
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, The Netherlands
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12
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Affiliation(s)
- Yuri E M van der Burgt
- Center for Proteomics and Metabolomics & Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, The Netherlands.
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13
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van der Burgt YEM, Kilgour DPA, Tsybin YO, Srzentić K, Fornelli L, Beck A, Wuhrer M, Nicolardi S. Structural Analysis of Monoclonal Antibodies by Ultrahigh Resolution MALDI In-Source Decay FT-ICR Mass Spectrometry. Anal Chem 2019; 91:2079-2085. [PMID: 30571088 PMCID: PMC6365908 DOI: 10.1021/acs.analchem.8b04515] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
![]()
The
emergence of complex protein therapeutics in general and monoclonal
antibodies (mAbs) in particular have stimulated analytical chemists
to develop new methods and strategies for their structural characterization.
Mass spectrometry plays a key role in providing information on the
primary amino acid sequence, post-translational modifications, and
other structure characteristics that must be monitored during the
manufacturing process and subsequent quality control assessment. In
this study, we present a novel method that allows structural characterization
of mAbs based on MALDI in-source decay (ISD) fragmentation, coupled
with Fourier transform ion cyclotron resonance (FT-ICR) MS. The method
benefits from higher resolution of absorption mode FT mass spectra,
compared to magnitude mode, which enables simultaneous identification
of ISD fragments from both the heavy and light chains with a higher
confidence in a wide mass range up to m/z 13 500. This method was applied to two standard mAbs, namely
NIST mAb and trastuzumab, in preparation for method application in
an interlaboratory study on mAbs structural analysis coordinated by
the Consortium for Top-Down Proteomics. Extensive sequence coverage
was obtained from the middle-down analysis (IdeS- and GingisKHAN-digested
mAbs) that complemented the top-down analysis of intact mAbs. In addition,
MALDI FT-ICR MS of IdeS-digested mAbs allowed isotopic-level profiling
of proteoforms with regard to heavy chain N-glycosylation.
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Affiliation(s)
- Yuri E M van der Burgt
- Center for Proteomics and Metabolomics , Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC , Leiden , The Netherlands
| | - David P A Kilgour
- Department of Chemistry , Nottingham Trent University , Nottingham , NG11 0JN , U.K
| | - Yury O Tsybin
- Spectroswiss , EPFL Innovation Park , 1015 Lausanne , Switzerland
| | - Kristina Srzentić
- Departments of Chemistry and Molecular Biosciences, and the Proteomics Center of Excellence , Northwestern University , 2145 N. Sheridan Road , Evanston , Illinois 60208 , United States
| | - Luca Fornelli
- Departments of Chemistry and Molecular Biosciences, and the Proteomics Center of Excellence , Northwestern University , 2145 N. Sheridan Road , Evanston , Illinois 60208 , United States
| | - Alain Beck
- Centre d'Immunologie Pierre Fabre , 74160 St. Julien-en-Genevois , France
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics , Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC , Leiden , The Netherlands
| | - Simone Nicolardi
- Center for Proteomics and Metabolomics , Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC , Leiden , The Netherlands
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14
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Vreeker GM, Nicolardi S, Bladergroen MR, van der Plas CJ, Mesker WE, Tollenaar RAEM, van der Burgt YEM, Wuhrer M. Automated Plasma Glycomics with Linkage-Specific Sialic Acid Esterification and Ultrahigh Resolution MS. Anal Chem 2018; 90:11955-11961. [PMID: 30230816 PMCID: PMC6209171 DOI: 10.1021/acs.analchem.8b02391] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 09/19/2018] [Indexed: 12/17/2022]
Abstract
High-throughput mass spectrometry (MS) glycomics is an emerging field driven by technological advancements including sample preparation and data processing. Previously, we reported an automated protocol for the analysis of N-glycans released from plasma proteins that included sialic acid derivatization with linkage-specificity, namely, ethylation of α2,6-linked sialic acid residues and lactone formation of α2,3-linked sialic acids. In the current study, each step in this protocol was further optimized. Method improvements included minimizing the extent of side-reaction during derivatization, an adjusted glycan purification strategy and mass analysis of the released N-glycans by ultrahigh resolution matrix-assisted laser desorption/ionization Fourier transform ion cyclotron resonance MS. The latter resolved peak overlap and simplified spectral alignment due to high mass measurement precision. Moreover, this resulted in more confident glycan assignments and improved signal-to-noise for low-abundant species. The performance of the protocol renders high-throughput applications feasible in the exciting field of clinical glycomics.
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Affiliation(s)
- Gerda
C. M. Vreeker
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, 2300 RC Leiden, The Netherlands
- Department
of Surgery, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Simone Nicolardi
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, 2300 RC Leiden, The Netherlands
- Department
of Surgery, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Marco R. Bladergroen
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, 2300 RC Leiden, The Netherlands
| | - Corné J. van der Plas
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, 2300 RC Leiden, The Netherlands
| | - Wilma E. Mesker
- Department
of Surgery, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Rob A. E. M. Tollenaar
- Department
of Surgery, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Yuri E. M. van der Burgt
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, 2300 RC Leiden, The Netherlands
| | - Manfred Wuhrer
- Center
for Proteomics and Metabolomics, Leiden
University Medical Center, 2300 RC Leiden, The Netherlands
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15
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de Vroome SW, Holst S, Girondo MR, van der Burgt YEM, Mesker WE, Tollenaar RAEM, Wuhrer M. Serum N-glycome alterations in colorectal cancer associate with survival. Oncotarget 2018; 9:30610-30623. [PMID: 30093973 PMCID: PMC6078140 DOI: 10.18632/oncotarget.25753] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 06/25/2018] [Indexed: 12/15/2022] Open
Abstract
Proteins are routinely measured in clinical laboratories for diagnosis, prognosis and therapy monitoring. Nevertheless, both test improvements (performance) and innovations (biomarkers) are needed, and protein N-glycosylation offers a rich source of potential markers. Here, we have analyzed the total serum N-glycome in a matched case-control study (124 cases versus 124 controls) of colorectal cancer patients. The results were validated in an independent sample cohort (both 61 cases versus 61 controls) and further tested in post-operative samples of cured patients. Our results revealed significant differences between patients and controls, with increased size (antennae) and sialylation of the N-glycans in the colorectal cancer patient sera as compared to mainly di-antennary N-glycans in sera from controls. Furthermore, glycan alterations showed strong associations with cancer stage and survival: The five-year survival rate largely varied between patients with an altered serum N-glycome (46%) and an N-glycome similar to controls (87%). Importantly, the total serum N-glycome showed prognostic value beyond age and stage. This clinical glycomics study provides novel serum biomarker candidates and shows the potential of total serum N-glycans as a prognostic panel. Moreover, serum N-glycome changes reverted to a control-like profile after successful treatment as was demonstrated from pre- and post-operative samples.
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Affiliation(s)
- Stefan W de Vroome
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Stephanie Holst
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Mar Rodriguez Girondo
- Department of Medical Statistics and Bioinformatics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Wilma E Mesker
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Rob A E M Tollenaar
- Department of Surgery, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
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16
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Ruhaak LR, Smit NPM, Romijn FPHTM, Pieterse MM, van der Laarse A, van der Burgt YEM, Cobbaert CM. Robust and Accurate 2-Year Performance of a Quantitative Mass Spectrometry-Based Apolipoprotein Test in a Clinical Chemistry Laboratory. Clin Chem 2018; 64:747-749. [PMID: 29378689 DOI: 10.1373/clinchem.2017.285098] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- L Renee Ruhaak
- Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden, the Netherlands
| | - Nico P M Smit
- Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden, the Netherlands
| | - Fred P H T M Romijn
- Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden, the Netherlands
| | - Mervin M Pieterse
- Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden, the Netherlands
| | - Arnoud van der Laarse
- Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden, the Netherlands
| | - Yuri E M van der Burgt
- Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden, the Netherlands
| | - Christa M Cobbaert
- Department of Clinical Chemistry and Laboratory Medicine Leiden University Medical Center Leiden, the Netherlands
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17
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Reiding KR, Vreeker GCM, Bondt A, Bladergroen MR, Hazes JMW, van der Burgt YEM, Wuhrer M, Dolhain RJEM. Serum Protein N-Glycosylation Changes with Rheumatoid Arthritis Disease Activity during and after Pregnancy. Front Med (Lausanne) 2018; 4:241. [PMID: 29359131 PMCID: PMC5766648 DOI: 10.3389/fmed.2017.00241] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 12/14/2017] [Indexed: 12/13/2022] Open
Abstract
Symptoms of rheumatoid arthritis (RA) improve during pregnancy, a phenomenon that was found to be associated with N-glycosylation changes of immunoglobulin G. Recent advances in high-throughput glycosylation analysis allow the assessment of the N-glycome of human sera as well. The aim of this study was to identify new protein N-glycosylation properties that associate with changes in RA disease activity during and after pregnancy. A longitudinal cohort of serum samples was collected during 285 pregnancies (32 control individuals and 253 RA patients). Per individual one sample was collected before conception, three during pregnancy, and three after delivery. Released serum protein N-glycans were measured by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) after employing chemical modification of the sialic acids to allow discrimination of sialic acid linkage isomers. Serum protein N-glycosylation showed strongly modified during pregnancy, with similar changes visible in control individuals and RA pregnancies. Namely, a decrease in bisection and an increase in galactosylation in diantennary glycans were found, as well as an increase in tri- and tetraantennary species and α2,3-linked sialylation thereof. The change in RA disease activity [DAS28(3)-CRP] proved negatively associated with the galactosylation of diantennary N-glycans, and positively with the sialylation of triantennary fucosylated species (A3FGS). While the protein source of the novel finding A3FGS is thus far unknown, its further study may improve our understanding of the etiology of RA disease severity.
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Affiliation(s)
- Karli R Reiding
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Gerda C M Vreeker
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Albert Bondt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands.,Department of Rheumatology, Leiden University Medical Center, Leiden, Netherlands
| | - Marco R Bladergroen
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Johanna M W Hazes
- Department of Rheumatology, Erasmus Medical Center, Rotterdam, Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands.,Department of Clinical Chemistry, Leiden University Medical Center, Leiden, Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
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18
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Nicolardi S, van der Burgt YEM, Codée JDC, Wuhrer M, Hokke CH, Chiodo F. Structural Characterization of Biofunctionalized Gold Nanoparticles by Ultrahigh-Resolution Mass Spectrometry. ACS Nano 2017; 11:8257-8264. [PMID: 28686409 PMCID: PMC5616101 DOI: 10.1021/acsnano.7b03402] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 07/07/2017] [Indexed: 05/24/2023]
Abstract
Biofunctionalized gold nanoparticles (AuNPs) enable innovative translational research and development in biomedicine. Biomolecules such as peptides, proteins, lipids, and carbohydrates can be assembled onto AuNPs to yield nanomaterials with unique properties for applications in imaging, photothermal therapy, vaccination strategies, and drug delivery. The characterization of functionalized AuNPs still remains an analytical challenge that normally requires the combination of multiple techniques. Laser desorption/ionization (LDI) and matrix-assisted LDI (MALDI) have been applied successfully in combination with time-of-flight (TOF) mass spectrometry (MS) for the analysis of the surface chemistry of AuNPs functionalized with synthetic ligands, however only for ligands with a molecular mass limited to 1000 Da. TOF-MS-based approaches in addition exhibit limited performance in terms of mass resolution and MS/MS possibilities. To overcome these limitations, we designed an approach for the analysis of AuNPs based on ultrahigh resolution Fourier transform ion cyclotron resonance (FTICR) MS and a combination of LDI and MALDI. To illustrate the performance of the method, we present a comprehensive characterization of the surface chemistry of AuNPs conjugated via a thiol-ending linker to either the ovalbumin peptide (OVA 323-339), the Lewis X antigen (Galβ1-4[Fucα1-3]GlcNAcβ1) trisaccharide, the tetramannoside Manα1-2Manα1-2Manα1-3Manα1, or a mixture of both carbohydrates. Collision-induced dissociation (CID) was used to characterize the structure of pseudomolecular ions generated by LDI/MALDI in-depth. These included [M + H]+ and [M + Na]+, and importantly also [M + Au]+ and [M + 2Au-H]+ ions. This first observation of gold-containing pseudomolecular ions provides direct evidence for the Au-conjugation of ligands. In addition, we show the applicability of the method to monitor proteolytic cleavage of peptides that are conjugated to the AuNP surface. The presented LDI/MALDI-FTICR-MS and MS/MS approach will be applicable to the characterization of a wide range of functionalized AuNPs.
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Affiliation(s)
- Simone Nicolardi
- Center
for Proteomics and Metabolomics and Department of Parasitology, Leiden University Medical Center, Leiden, 2333 ZA, The Netherlands
| | - Yuri E. M. van der Burgt
- Center
for Proteomics and Metabolomics and Department of Parasitology, Leiden University Medical Center, Leiden, 2333 ZA, The Netherlands
| | - Jeroen D. C. Codée
- Department
of Bio-Organic Synthesis, Leiden Institute of Chemistry, Leiden University, Leiden, 2333 CC, The Netherlands
| | - Manfred Wuhrer
- Center
for Proteomics and Metabolomics and Department of Parasitology, Leiden University Medical Center, Leiden, 2333 ZA, The Netherlands
| | - Cornelis H. Hokke
- Center
for Proteomics and Metabolomics and Department of Parasitology, Leiden University Medical Center, Leiden, 2333 ZA, The Netherlands
| | - Fabrizio Chiodo
- Center
for Proteomics and Metabolomics and Department of Parasitology, Leiden University Medical Center, Leiden, 2333 ZA, The Netherlands
- Department
of Bio-Organic Synthesis, Leiden Institute of Chemistry, Leiden University, Leiden, 2333 CC, The Netherlands
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19
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Potjer TP, Mertens BJ, Nicolardi S, van der Burgt YEM, Bonsing BA, Mesker WE, Tollenaar RAEM, Vasen HFA. Application of a Serum Protein Signature for Pancreatic Cancer to Separate Cases from Controls in a Pancreatic Surveillance Cohort. Transl Oncol 2016; 9:242-7. [PMID: 27267843 PMCID: PMC4907893 DOI: 10.1016/j.tranon.2016.03.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/02/2016] [Accepted: 03/08/2016] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Pancreatic cancer (PC) surveillance is currently offered to individuals with a genetic predisposition to PC, but routinely used radiological screening modalities are not entirely reliable in detecting early-stage PC or its precursor lesions. We recently identified a discriminating PC biomarker signature in a sporadic patient cohort. In this study, we investigated if protein profiling can accurately distinguish PC from non-PC in a pancreatic surveillance cohort of genetically predisposed individuals. METHODS Serum samples of 66 individuals with a CDKN2A germline mutation who participated in the pancreatic surveillance program (5 cases, 61 controls) were obtained following a standardized protocol. After sample clean-up, peptide and protein profiles were obtained on an ultrahigh-resolution matrix-assisted laser desorption/ionization-Fourier transform ion cyclotron resonance mass spectrometry platform. A discriminant score for each sample was calculated with a previously designed prediction rule, and the median discriminant scores of cases and controls were compared. Individuals with precursor lesions of PC (n = 4) and individuals with a recent diagnosis of melanoma (n = 4) were also separately considered. RESULTS Cases had a higher median discriminant score than controls (0.26 vs 0.016; P = .001). The only individual with pathologically confirmed precursor lesions of PC could also be clearly distinguished from controls, and having a (recent) medical history of melanoma did not influence the protein signatures. CONCLUSIONS Peptide and protein signatures are able to accurately distinguish PC cases from controls in a pancreatic surveillance setting. Mass spectrometry-based protein profiling therefore seems to be a promising candidate for implementation in the pancreatic surveillance program as an additional screening modality.
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Affiliation(s)
- Thomas P Potjer
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, the Netherlands.
| | - Bart J Mertens
- Department of Medical Statistics and Bioinformatics, Leiden University Medical Center, Leiden, the Netherlands
| | - Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands
| | - Bert A Bonsing
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | - Wilma E Mesker
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | - Rob A E M Tollenaar
- Department of Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | - Hans F A Vasen
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, the Netherlands
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20
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Fleurbaaij F, Kraakman MEM, Claas ECJ, Knetsch CW, van Leeuwen HC, van der Burgt YEM, Veldkamp KE, Vos MC, Goessens W, Mertens BJ, Kuijper EJ, Hensbergen PJ, Nicolardi S. Typing Pseudomonas aeruginosa Isolates with Ultrahigh Resolution MALDI-FTICR Mass Spectrometry. Anal Chem 2016; 88:5996-6003. [PMID: 27123572 DOI: 10.1021/acs.analchem.6b01037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The introduction of standardized matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) platforms in the medical microbiological practice has revolutionized the way microbial species identification is performed on a daily basis. To a large extent, this is due to the ease of operation. Acquired spectra are compared to profiles obtained from cultured colonies present in a reference spectra database. It is fast and reliable, and costs are low compared to previous diagnostic approaches. However, the low resolution and dynamic range of the MALDI-TOF profiles have shown limited applicability for the discrimination of different bacterial strains, as achieved with typing based on genetic markers. This is pivotal in cases where certain strains are associated with, e.g., virulence or antibiotic resistance. Ultrahigh resolution MALDI-FTICR MS allows the measurement of small proteins at isotopic resolution and can be used to analyze complex mixtures with increased dynamic range and higher precision than MALDI-TOF MS, while still generating results in a similar time frame. Here, we propose to use ultrahigh resolution 15T MALDI-Fourier transform ion cyclotron resonance (FTICR) MS to discriminate clinically relevant bacterial strains after species identification performed by MALDI-TOF MS. We used a collection of well characterized Pseudomonas aeruginosa strains, featuring distinct antibiotic resistance profiles, and isolates obtained during hospital outbreaks. Following cluster analysis based on amplification fragment length polymorphism (AFLP), these strains were grouped into three different clusters. The same clusters were obtained using protein profiles generated by MALDI-FTICR MS. Subsequent intact protein analysis by electrospray ionization (ESI)-collision-induced dissociation (CID)-FTICR MS was applied to identify protein isoforms that contribute to the separation of the different clusters, illustrating the additional advantage of this analytical platform.
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Affiliation(s)
- Frank Fleurbaaij
- Department of Medical Microbiology, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Margriet E M Kraakman
- Department of Medical Microbiology, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Eric C J Claas
- Department of Medical Microbiology, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Cornelis W Knetsch
- Department of Medical Microbiology, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Hans C van Leeuwen
- Department of Medical Microbiology, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Karin Ellen Veldkamp
- Department of Medical Microbiology, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Margreet C Vos
- Department of Medical Microbiology and Infectious Disease, Erasmus MC , 3015 CN Rotterdam, The Netherlands
| | - Wil Goessens
- Department of Medical Microbiology and Infectious Disease, Erasmus MC , 3015 CN Rotterdam, The Netherlands
| | - Bart J Mertens
- Department of Medical Statistics, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Ed J Kuijper
- Department of Medical Microbiology, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Paul J Hensbergen
- Center for Proteomics and Metabolomics, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
| | - Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center , 2333 ZA Leiden, The Netherlands
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21
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van der Plas-Duivesteijn SJ, Wulff T, Klychnikov O, Ohana D, Dalebout H, van Veelen PA, de Keijzer J, Nessen MA, van der Burgt YEM, Deelder AM, Palmblad M. Differentiating samples and experimental protocols by direct comparison of tandem mass spectra. Rapid Commun Mass Spectrom 2016; 30:731-738. [PMID: 26864526 DOI: 10.1002/rcm.7494] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 12/16/2015] [Accepted: 12/20/2015] [Indexed: 06/05/2023]
Abstract
RATIONALE Peptide tandem mass spectra can be analyzed by a number of means. They can be compared against predicted spectra of peptides derived from genome sequences, compared against previously acquired and identified spectra, or - sometimes - sequenced de novo. We recently introduced another method which compares spectra between liquid chromatography/tandem mass spectrometry (LC/MS/MS) datasets to determine the shared spectral content, and demonstrated how this can be applied in a molecular phylogenetic study using sera from human and non-human primates. We will here explore if such a method have other, serendipitous uses. METHODS We used the existing compareMS2 algorithm without modification on a diverse set of experiments. RESULTS First we conducted a small phylogenetic study, using (mammalian) bone samples to study old material, and human pathogens aiming to distinguish clinically important strains. Although not as straightforward as primate sera analysis, the method shows significant promise for all these applications. We also used the algorithm to compare 24 different protocols for extraction of proteins from muscle tissue. The results provided useful information in comparing protocols. Finally, we applied compareMS2 aiming for quality control of two traceable protein reference standards (troponin) used in clinical chemistry assays, by analysing the effect of storage conditions. CONCLUSIONS The results illustrate a broad applicability of the metric based on shared tandem mass spectra between LC/MS/MS datasets for analysing protein digests in different types of experiments. There is no reason to assume that our instance of this method is optimal in any of these situations, as it makes limited or no use of accurate mass and chromatographic retention time. We propose that with further improvement and refinement, this type of analysis can be applied as a simple but informative first step in many pipelines for bottom-up tandem mass spectrometry data analysis in proteomics and other fields, comparing or analysing large numbers of samples or datasets.
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Affiliation(s)
| | - Tune Wulff
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Hørsholm, Denmark
| | - Oleg Klychnikov
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Dana Ohana
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Hans Dalebout
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Peter A van Veelen
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Jeroen de Keijzer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
- Department of Clinical Chemistry, Leiden University Medical Center, Leiden, The Netherlands
| | - André M Deelder
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Magnus Palmblad
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
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22
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Oonk S, Spitali P, Hiller M, Switzar L, Dalebout H, Calissano M, Lochmüller H, Aartsma-Rus A, 't Hoen PAC, van der Burgt YEM. Comparative mass spectrometric and immunoassay-based proteome analysis in serum of Duchenne muscular dystrophy patients. Proteomics Clin Appl 2016; 10:290-9. [PMID: 26680509 DOI: 10.1002/prca.201500044] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 11/27/2015] [Accepted: 12/10/2015] [Indexed: 11/11/2022]
Abstract
PURPOSE Duchenne muscular dystrophy (DMD) is a severe and fatal neuromuscular disease. With the current developments on novel therapeutic strategies for DMD, the need to carefully monitor disease progression or regression upon treatment using molecular markers has become urgent. EXPERIMENTAL DESIGN 2D LC protein fractionation was performed on patient serum samples, followed by LC-MS/MS-based identifications with label-free quantifications. RESULTS Protein signatures were compared between patients and healthy (child and adult) controls and between ambulant and nonambulant patients. Various myofibrillar proteins demonstrated differences between DMD patients and controls, likely due to leakiness and breakdown of muscle fibers. Previously reported biomarkers, such as muscle-derived titin, myosin, and carbonic anhydrase I (CA1), were verified. MS-based results were compared with ELISA for vitamin D binding protein (GC), fibulin-1 (FBLN1), gelsolin (GSN), and carbonic anhydrase 1 (CA1). CONCLUSIONS AND CLINICAL RELEVANCE The combined results of MS- and ELISA-based quantifications indicated more studies are needed to validate this serum protein signature for DMD patients. With these data promising candidate biomarkers have been identified for a rare genetic disease using serum proteome analysis.
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Affiliation(s)
- Stijn Oonk
- Department of Human Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Pietro Spitali
- Department of Human Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Monika Hiller
- Department of Human Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Linda Switzar
- Department of Human Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands.,Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Hans Dalebout
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Mattia Calissano
- John Walton Muscular Dystrophy Research Center, International Centre for Life, Central Parkway, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Hanns Lochmüller
- John Walton Muscular Dystrophy Research Center, International Centre for Life, Central Parkway, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Annemieke Aartsma-Rus
- Department of Human Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands.,John Walton Muscular Dystrophy Research Center, International Centre for Life, Central Parkway, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Peter A C 't Hoen
- Department of Human Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
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23
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van den Broek I, Romijn FPHTM, Nouta J, van der Laarse A, Drijfhout JW, Smit NPM, van der Burgt YEM, Cobbaert CM. Automated Multiplex LC-MS/MS Assay for Quantifying Serum Apolipoproteins A-I, B, C-I, C-II, C-III, and E with Qualitative Apolipoprotein E Phenotyping. Clin Chem 2016; 62:188-97. [DOI: 10.1373/clinchem.2015.246702] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 11/03/2015] [Indexed: 12/31/2022]
Abstract
Abstract
BACKGROUND
Direct and calculated measures of lipoprotein fractions for cardiovascular risk assessment suffer from analytical inaccuracy in certain dyslipidemic and pathological states, most commonly hypertriglyceridemia. LC-MS/MS has proven suitable for multiplexed quantification and phenotyping of apolipoproteins. We developed and provisionally validated an automated assay for quantification of apolipoprotein (apo) A-I, B, C-I, C-II, C-III, and E and simultaneous qualitative assessment of apoE phenotypes.
METHODS
We used 5 value-assigned human serum pools for external calibration. Serum proteins were denatured, reduced, and alkylated according to standard mass spectrometry–based proteomics procedures. After trypsin digestion, peptides were analyzed by LC-MS/MS. For each peptide, we measured 2 transitions. We compared LC-MS/MS results to those obtained by an immunoturbidimetric assay or ELISA.
RESULTS
Intraassay CVs were 2.3%–5.5%, and total CVs were 2.5%–5.9%. The LC-MS/MS assay correlated (R = 0.975–0.995) with immunoturbidimetric assays with Conformité Européenne marking for apoA-I, apoB, apoC-II, apoC-III, and apoE in normotriglyceridemic (n = 54) and hypertriglyceridemic (n = 46) sera. Results were interchangeable for apoA-I ≤3.0 g/L (Deming slope 1.014) and for apoB-100 ≤1.8 g/L (Deming slope 1.016) and were traceable to higher-order standards.
CONCLUSIONS
The multiplex format provides an opportunity for new diagnostic and pathophysiologic insights into types of dyslipidemia and allows a more personalized approach for diagnosis and treatment of lipid abnormalities.
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Affiliation(s)
| | | | - Jan Nouta
- Department of Clinical Chemistry and Laboratory Medicine
| | | | | | - Nico P M Smit
- Department of Clinical Chemistry and Laboratory Medicine
| | - Yuri E M van der Burgt
- Department of Clinical Chemistry and Laboratory Medicine
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, the Netherlands
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24
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Switzar L, Nicolardi S, Rutten JW, Oberstein SAJL, Aartsma-Rus A, van der Burgt YEM. In-Depth Characterization of Protein Disulfide Bonds by Online Liquid Chromatography-Electrochemistry-Mass Spectrometry. J Am Soc Mass Spectrom 2016; 27:50-8. [PMID: 26369777 PMCID: PMC4686567 DOI: 10.1007/s13361-015-1258-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 08/14/2015] [Accepted: 08/20/2015] [Indexed: 05/04/2023]
Abstract
Disulfide bonds are an important class of protein post-translational modifications, yet this structurally crucial modification type is commonly overlooked in mass spectrometry (MS)-based proteomics approaches. Recently, the benefits of online electrochemistry-assisted reduction of protein S-S bonds prior to MS analysis were exemplified by successful characterization of disulfide bonds in peptides and small proteins. In the current study, we have combined liquid chromatography (LC) with electrochemistry (EC) and mass analysis by Fourier transform ion cyclotron resonance (FTICR) MS in an online LC-EC-MS platform to characterize protein disulfide bonds in a bottom-up proteomics workflow. A key advantage of a LC-based strategy is the use of the retention time in identifying both intra- and interpeptide disulfide bonds. This is demonstrated by performing two sequential analyses of a certain protein digest, once without and once with electrochemical reduction. In this way, the "parent" disulfide-linked peptide detected in the first run has a retention time-based correlation with the EC-reduced peptides detected in the second run, thus simplifying disulfide bond mapping. Using this platform, both inter- and intra-disulfide-linked peptides were characterized in two different proteins, ß-lactoglobulin and ribonuclease B. In order to prevent disulfide reshuffling during the digestion process, proteins were digested at a relatively low pH, using (a combination of) the high specificity proteases trypsin and Glu-C. With this approach, disulfide bonds in ß-lactoglobulin and ribonuclease B were comprehensively identified and localized, showing that online LC-EC-MS is a useful tool for the characterization of protein disulfide bonds.
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Affiliation(s)
- Linda Switzar
- Department of Human Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands.
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Leiden, The Netherlands.
- , Albinusdreef 2, Postzone S3, P.O. Box 9600, 2300 RC, Leiden, The Netherlands.
| | - Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Julie W Rutten
- Department of Human Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
- Department of Clinical Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | | | - Annemieke Aartsma-Rus
- Department of Human Genetics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
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25
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Nicolardi S, Bogdanov B, Deelder AM, Palmblad M, van der Burgt YEM. Developments in FTICR-MS and Its Potential for Body Fluid Signatures. Int J Mol Sci 2015; 16:27133-44. [PMID: 26580595 PMCID: PMC4661870 DOI: 10.3390/ijms161126012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/03/2015] [Accepted: 11/05/2015] [Indexed: 01/01/2023] Open
Abstract
Fourier transform mass spectrometry (FTMS) is the method of choice for measurements that require ultra-high resolution. The establishment of Fourier transform ion cyclotron resonance (FTICR) MS, the availability of biomolecular ionization techniques and the introduction of the Orbitrap™ mass spectrometer have widened the number of FTMS-applications enormously. One recent example involves clinical proteomics using FTICR-MS to discover and validate protein biomarker signatures in body fluids such as serum or plasma. These biological samples are highly complex in terms of the type and number of components, their concentration range, and the structural identity of each species, and thus require extensive sample cleanup and chromatographic separation procedures. Clearly, such an elaborate and multi-step sample preparation process hampers high-throughput analysis of large clinical cohorts. A final MS read-out at ultra-high resolution enables the analysis of a more complex sample and can thus simplify upfront fractionations. To this end, FTICR-MS offers superior ultra-high resolving power with accurate and precise mass-to-charge ratio (m/z) measurement of a high number of peptides and small proteins (up to 20 kDa) at isotopic resolution over a wide mass range, and furthermore includes a wide variety of fragmentation strategies to characterize protein sequence and structure, including post-translational modifications (PTMs). In our laboratory, we have successfully applied FTICR “next-generation” peptide profiles with the purpose of cancer disease classifications. Here we will review a number of developments and innovations in FTICR-MS that have resulted in robust and routine procedures aiming for ultra-high resolution signatures of clinical samples, exemplified with state-of-the-art examples for serum and saliva.
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Affiliation(s)
- Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), PO Box 9600, 2300 RC Leiden, The Netherlands.
| | - Bogdan Bogdanov
- Perkin Elmer, San Jose Technology Center, San Jose, CA 95134, USA.
| | - André M Deelder
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), PO Box 9600, 2300 RC Leiden, The Netherlands.
| | - Magnus Palmblad
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), PO Box 9600, 2300 RC Leiden, The Netherlands.
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), PO Box 9600, 2300 RC Leiden, The Netherlands.
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Bladergroen MR, Reiding KR, Hipgrave Ederveen AL, Vreeker GCM, Clerc F, Holst S, Bondt A, Wuhrer M, van der Burgt YEM. Automation of High-Throughput Mass Spectrometry-Based Plasma N-Glycome Analysis with Linkage-Specific Sialic Acid Esterification. J Proteome Res 2015; 14:4080-6. [PMID: 26179816 DOI: 10.1021/acs.jproteome.5b00538] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Glycosylation is a post-translational modification of key importance with heterogeneous structural characteristics. Previously, we have developed a robust, high-throughput MALDI-TOF-MS method for the comprehensive profiling of human plasma N-glycans. In this approach, sialic acid residues are derivatized with linkage-specificity, namely the ethylation of α2,6-linked sialic acid residues with parallel lactone formation of α2,3-linked sialic acids. In the current study, this procedure was used as a starting point for the automation of all steps on a liquid-handling robot system. This resulted in a time-efficient and fully standardized procedure with throughput times of 2.5 h for a first set of 96 samples and approximately 1 h extra for each additional sample plate. The mass analysis of the thus-obtained glycans was highly reproducible in terms of relative quantification, with improved interday repeatability as compared to that of manual processing.
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Affiliation(s)
- Marco R Bladergroen
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC Leiden, The Netherlands
| | - Karli R Reiding
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC Leiden, The Netherlands
| | - Agnes L Hipgrave Ederveen
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC Leiden, The Netherlands
| | - Gerda C M Vreeker
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC Leiden, The Netherlands
| | - Florent Clerc
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC Leiden, The Netherlands
| | - Stephanie Holst
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC Leiden, The Netherlands
| | - Albert Bondt
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC Leiden, The Netherlands.,Department of Rheumatology, Erasmus University Medical Center , 3000 CA Rotterdam, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC Leiden, The Netherlands.,Division of BioAnalytical Chemistry, VU University Amsterdam , 1081 HV Amsterdam, The Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC) , PO Box 9600, 2300 RC Leiden, The Netherlands
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van den Broek I, Nouta J, Razavi M, Yip R, Bladergroen MR, Romijn FPHTM, Smit NPM, Drews O, Paape R, Suckau D, Deelder AM, van der Burgt YEM, Pearson TW, Anderson NL, Cobbaert CM. Quantification of serum apolipoproteins A-I and B-100 in clinical samples using an automated SISCAPA-MALDI-TOF-MS workflow. Methods 2015; 81:74-85. [PMID: 25766926 DOI: 10.1016/j.ymeth.2015.03.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 03/01/2015] [Accepted: 03/02/2015] [Indexed: 01/09/2023] Open
Abstract
A fully automated workflow was developed and validated for simultaneous quantification of the cardiovascular disease risk markers apolipoproteins A-I (apoA-I) and B-100 (apoB-100) in clinical sera. By coupling of stable-isotope standards and capture by anti-peptide antibodies (SISCAPA) for enrichment of proteotypic peptides from serum digests to matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) MS detection, the standardized platform enabled rapid, liquid chromatography-free quantification at a relatively high throughput of 96 samples in 12h. The average imprecision in normo- and triglyceridemic serum pools was 3.8% for apoA-I and 4.2% for apoB-100 (4 replicates over 5 days). If stored properly, the MALDI target containing enriched apoA-1 and apoB-100 peptides could be re-analyzed without any effect on bias or imprecision for at least 7 days after initial analysis. Validation of the workflow revealed excellent linearity for daily calibration with external, serum-based calibrators (R(2) of 0.984 for apoA-I and 0.976 for apoB-100 as average over five days), and absence of matrix effects or interference from triglycerides, protein content, hemolysates, or bilirubins. Quantification of apoA-I in 93 normo- and hypertriglyceridemic clinical sera showed good agreement with immunoturbidimetric analysis (slope = 1.01, R(2) = 0.95, mean bias = 4.0%). Measurement of apoB-100 in the same clinical sera using both methods, however, revealed several outliers in SISCAPA-MALDI-TOF-MS measurements, possibly as a result of the lower MALDI-TOF-MS signal intensity (slope = 1.09, R(2) = 0.91, mean bias = 2.0%). The combination of analytical performance, rapid cycle time and automation potential validate the SISCAPA-MALDI-TOF-MS platform as a valuable approach for standardized and high-throughput quantification of apoA-I and apoB-100 in large sample cohorts.
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Affiliation(s)
- Irene van den Broek
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands.
| | - Jan Nouta
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Morteza Razavi
- SISCAPA Assay Technologies Inc., Box 53309, Washington, DC 20009, USA
| | - Richard Yip
- SISCAPA Assay Technologies Inc., Box 53309, Washington, DC 20009, USA
| | - Marco R Bladergroen
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Fred P H T M Romijn
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Nico P M Smit
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Oliver Drews
- Bruker Daltonics GmbH, Fahrenheitstraße 4, 28359 Bremen, Germany
| | - Rainer Paape
- Bruker Daltonics GmbH, Fahrenheitstraße 4, 28359 Bremen, Germany
| | - Detlev Suckau
- Bruker Daltonics GmbH, Fahrenheitstraße 4, 28359 Bremen, Germany
| | - André M Deelder
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Terry W Pearson
- SISCAPA Assay Technologies Inc., Box 53309, Washington, DC 20009, USA
| | - N Leigh Anderson
- SISCAPA Assay Technologies Inc., Box 53309, Washington, DC 20009, USA
| | - Christa M Cobbaert
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
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van den Broek I, Romijn FPHTM, Smit NPM, van der Laarse A, Drijfhout JW, van der Burgt YEM, Cobbaert CM. Quantifying protein measurands by peptide measurements: where do errors arise? J Proteome Res 2015; 14:928-42. [PMID: 25494833 DOI: 10.1021/pr5011179] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Clinically actionable quantification of protein biomarkers by mass spectrometry (MS) requires analytical performance in concordance with quality specifications for diagnostic tests. Laboratory-developed tests should, therefore, be validated in accordance with EN ISO 15189:2012 guidelines for medical laboratories to demonstrate competence and traceability along the entire workflow, including the selected standardization strategy and the phases before, during, and after proteolysis. In this study, bias and imprecision of a previously developed MS method for quantification of serum apolipoproteins A-I (Apo A-I) and B (Apo B) were thoroughly validated according to Clinical and Laboratory Standards Institute (CLSI) guidelines EP15-A2 and EP09-A3, using 100 patient sera and either stable-isotope labeled (SIL) peptides or SIL-Apo A-I as internal standard. The systematic overview of error components assigned sample preparation before the first 4 h of proteolysis as major source (∼85%) of within-sample imprecision without external calibration. No improvement in imprecision was observed with the use of SIL-Apo A-I instead of SIL-peptides. On the contrary, when the use of SIL-Apo A-I was combined with external calibration, imprecision improved significantly (from ∼9% to ∼6%) as a result of the normalization for matrix effects on linearity. A between-sample validation of bias in 100 patient sera further supported the presence of matrix effects on digestion completeness and additionally demonstrated specimen-specific biases associated with modified peptide sequences or alterations in protease activity. In conclusion, the presented overview of bias and imprecision components contributes to a better understanding of the sources of errors in MS-based protein quantification and provides valuable recommendations to assess and control analytical quality in concordance with the requirements for clinical use.
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Affiliation(s)
- Irene van den Broek
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center (LUMC) , Albinusdreef 2, 2333 ZA Leiden, The Netherlands
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Bladergroen MR, van der Burgt YEM. Solid-phase extraction strategies to surmount body fluid sample complexity in high-throughput mass spectrometry-based proteomics. J Anal Methods Chem 2015; 2015:250131. [PMID: 25692071 PMCID: PMC4322654 DOI: 10.1155/2015/250131] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 01/08/2015] [Accepted: 01/08/2015] [Indexed: 05/08/2023]
Abstract
For large-scale and standardized applications in mass spectrometry- (MS-) based proteomics automation of each step is essential. Here we present high-throughput sample preparation solutions for balancing the speed of current MS-acquisitions and the time needed for analytical workup of body fluids. The discussed workflows reduce body fluid sample complexity and apply for both bottom-up proteomics experiments and top-down protein characterization approaches. Various sample preparation methods that involve solid-phase extraction (SPE) including affinity enrichment strategies have been automated. Obtained peptide and protein fractions can be mass analyzed by direct infusion into an electrospray ionization (ESI) source or by means of matrix-assisted laser desorption ionization (MALDI) without further need of time-consuming liquid chromatography (LC) separations.
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Affiliation(s)
- Marco R. Bladergroen
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics, P.O. Box 9600, 2300 RC Leiden, Netherlands
| | - Yuri E. M. van der Burgt
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics, P.O. Box 9600, 2300 RC Leiden, Netherlands
- *Yuri E. M. van der Burgt:
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30
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Velstra B, Vonk MA, Bonsing BA, Mertens BJ, Nicolardi S, Huijbers A, Vasen H, Deelder AM, Mesker WE, van der Burgt YEM, Tollenaar RAEM. Serum peptide signatures for pancreatic cancer based on mass spectrometry: a comparison to CA19-9 levels and routine imaging techniques. J Cancer Res Clin Oncol 2014; 141:531-41. [DOI: 10.1007/s00432-014-1812-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 08/21/2014] [Indexed: 12/26/2022]
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31
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Smit NPM, Romijn FPHTM, van den Broek I, Drijfhout JW, Haex M, van der Laarse A, van der Burgt YEM, Cobbaert CM. Metrological traceability in mass spectrometry-based targeted protein quantitation: a proof-of-principle study for serum apolipoproteins A-I and B100. J Proteomics 2014; 109:143-61. [PMID: 24972322 DOI: 10.1016/j.jprot.2014.06.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 05/22/2014] [Accepted: 06/16/2014] [Indexed: 12/23/2022]
Abstract
UNLABELLED In this study, we have followed up on previous liquid chromatography (LC) multiple reaction monitoring (MRM) mass spectrometry (MS) approaches for measurement of apolipoprotein (apo) A-I and apo B100 in serum aiming for implementation of a multiplexed assay in a clinical chemistry laboratory with full metrological traceability. Signature peptides were selected and detected by dynamic MRM, and stable isotope labeled (SIL)-peptides were used as internal standards. Five apo A-I and four apo B100 peptides were measured in serum digests with linearity (R(2)>0.992) in the physiologically relevant concentration ranges. Linearity with regard to protein concentration was ascertained at five concentration levels (R(2)>0.926 and R(2)>0.965, for the apo A-I and apo B100 peptides, respectively). Three native value-assigned sera were used as external calibrators for further method verification. Imprecision values on sample preparation and LC-MS/MS acquisition were below the established minimal specifications for apo A-I and apo B100 (5.0% and 5.3%, respectively). Correlation of LC-MS/MS results with immunoturbidimetric assay results, for normo- and hypertriglyceridemic samples, showed R(2)>0.944 for apo A-I and R(2)>0.964 for apo B100. This LC-MS/MS method has potential for clinical application in normo- and dyslipidemic patients. BIOLOGICAL SIGNIFICANCE Measurement of apo A-I and apo B100 may offer an alternative to high and low density lipoprotein cholesterol (HDL-c and LDL-c) methods for cardiovascular disease risk assessment in dyslipidemic patients [1]. An LC-MS/MS method for apo A-I and apo B100 has the advantage of antibody independent and specific detection of protein signature peptides. The introduction of an LC-MS/MS method for apo A-I and apo B100 can serve as an example for many existing and newly developed (multiplex) biomarker methods in quantitative clinical chemistry proteomics (qCCP). Such LC-MS/MS methods should meet basic clinical chemistry principles with regard to test evaluation [2]. Criteria for imprecision should be pre-defined, e.g., based on biological variation. The use of commutable and traceable serum-based calibrators will improve inter-laboratory reproducibility of LC-MS/MS methods and may contribute to a more rapid transition of biomarker discovery to clinical utility with benefit for the patient treatment and improvement of general health care.
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Affiliation(s)
- Nico P M Smit
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands.
| | - Fred P H T M Romijn
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Irene van den Broek
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Jan W Drijfhout
- Department of Immunohematology and Bloodtransfusion, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Martin Haex
- Agilent Technologies Netherlands B.V., Amstelveen, The Netherlands
| | - Arnoud van der Laarse
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Yuri E M van der Burgt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands
| | - Christa M Cobbaert
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands.
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32
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Nicolardi S, Deelder AM, Palmblad M, van der Burgt YEM. Structural analysis of an intact monoclonal antibody by online electrochemical reduction of disulfide bonds and Fourier transform ion cyclotron resonance mass spectrometry. Anal Chem 2014; 86:5376-82. [PMID: 24780057 DOI: 10.1021/ac500383c] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Structural confirmation and quality control of recombinant monoclonal antibodies (mAbs) by top-down mass spectrometry is still challenging due to the size of the proteins, disulfide content, and post-translational modifications such as glycosylation. In this study we have applied electrochemistry (EC) to overcome disulfide bridge complexity in top-down analysis of mAbs. To this end, an electrochemical cell was coupled directly to an electrospray ionization (ESI) source and a Fourier transform ion cyclotron resonance (FTICR) mass spectrometer (MS) equipped with a 15 T magnet. By performing online EC-assisted reduction of interchain disulfide bonds in an intact mAb, the released light chains could be selected for tandem mass spectrometry (MS/MS) analysis without interference from heavy-chain fragments. Moreover, the acquisition of full MS scans under denaturing conditions allowed profiling of all abundant mAb glycoforms. Ultrahigh-resolution FTICR-MS measurements provided fully resolved isotopic distributions of intact mAb and enabled the identification of the most abundant adducts and other interfering species. Furthermore, it was found that reduction of interchain disulfide bonds occurs in the ESI source dependent on capillary voltage and solvent composition. This phenomenon was systematically evaluated and compared with the results obtained from reduction in the electrochemical cell.
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Affiliation(s)
- Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center , Albinusdreef 2, 2300 RC Leiden, The Netherlands
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33
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Nicolardi S, Giera M, Kooijman P, Kraj A, Chervet JP, Deelder AM, van der Burgt YEM. On-line electrochemical reduction of disulfide bonds: improved FTICR-CID and -ETD coverage of oxytocin and hepcidin. J Am Soc Mass Spectrom 2013; 24:1980-7. [PMID: 24018861 PMCID: PMC3837188 DOI: 10.1007/s13361-013-0725-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 07/25/2013] [Accepted: 07/25/2013] [Indexed: 05/21/2023]
Abstract
Particularly in the field of middle- and top-down peptide and protein analysis, disulfide bridges can severely hinder fragmentation and thus impede sequence analysis (coverage). Here we present an on-line/electrochemistry/ESI-FTICR-MS approach, which was applied to the analysis of the primary structure of oxytocin, containing one disulfide bridge, and of hepcidin, containing four disulfide bridges. The presented workflow provided up to 80% (on-line) conversion of disulfide bonds in both peptides. With minimal sample preparation, such reduction resulted in a higher number of peptide backbone cleavages upon CID or ETD fragmentation, and thus yielded improved sequence coverage. The cycle times, including electrode recovery, were rapid and, therefore, might very well be coupled with liquid chromatography for protein or peptide separation, which has great potential for high-throughput analysis.
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Affiliation(s)
- Simone Nicolardi
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics, 2300 RC Leiden, The Netherlands
| | - Martin Giera
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics, 2300 RC Leiden, The Netherlands
| | - Pieter Kooijman
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics, 2300 RC Leiden, The Netherlands
| | | | | | - André M. Deelder
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics, 2300 RC Leiden, The Netherlands
| | - Yuri E. M. van der Burgt
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics, 2300 RC Leiden, The Netherlands
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van den Broek I, Smit NPM, Romijn FPHTM, van der Laarse A, Deelder AM, van der Burgt YEM, Cobbaert CM. Evaluation of interspecimen trypsin digestion efficiency prior to multiple reaction monitoring-based absolute protein quantification with native protein calibrators. J Proteome Res 2013; 12:5760-74. [PMID: 24168082 DOI: 10.1021/pr400763d] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Implementation of quantitative clinical chemistry proteomics (qCCP) requires targeted proteomics approaches, usually involving bottom-up multiple reaction monitoring-mass spectrometry (MRM-MS) with stable-isotope labeled standard (SIS) peptides, to move toward more accurate measurements. Two aspects of qCCP that deserve special attention are (1) proper calibration and (2) the assurance of consistent digestion. Here, we describe the evaluation of tryptic digestion efficiency by monitoring various signature peptides, missed cleavages, and modifications during proteolysis of apolipoprotein A-I and B in normo- and hypertriglyceridemic specimens. Absolute quantification of apolipoprotein A-I and B was performed by LC-MRM-MS with SIS peptide internal standards at two time points (4 and 20 h), using three native protein calibrators. Comparison with an immunoturbidimetric assay revealed recoveries of 99.4 ± 6.5% for apolipoprotein A-I and 102.6 ± 7.2% for apolipoprotein B after 4 h of trypsin digestion. Protein recoveries after 20 h trypsin incubation equaled 95.9 ± 6.9% and 106.0 ± 10.0% for apolipoproteins A-I and B, respectively. In conclusion, the use of metrologically traceable, native protein calibrators looks promising for accurate quantification of apolipoprotein A-I and B. Selection of rapidly formed peptides, that is, with no or minor missed cleavages, and the use of short trypsin incubation times for these efficiently cleaved peptides are likely to further reduce the variability introduced by trypsin digestion and to improve the traceability of test results to reach the desirable analytical performance for clinical chemistry application.
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Affiliation(s)
- Irene van den Broek
- Department of Clinical Chemistry and Laboratory Medicine, Leiden University Medical Center (LUMC) , Albinusdreef 2, 2333 ZA, Leiden, the Netherlands
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35
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Jónasdóttir HS, Nicolardi S, Jonker W, Derks R, Palmblad M, Ioan-Facsinay A, Toes R, van der Burgt YEM, Deelder AM, Mayboroda OA, Giera M. Detection and Structural Elucidation of Esterified Oxylipids in Human Synovial Fluid by Electrospray Ionization-Fourier Transform Ion-Cyclotron Mass Spectrometry and Liquid Chromatography-Ion Trap-MS3: Detection of Esterified Hydroxylated Docosapentaenoic Acid Containing Phospholipids. Anal Chem 2013; 85:6003-10. [DOI: 10.1021/ac400826z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Hulda S. Jónasdóttir
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics,
Albinusdreef 2, 2300RC Leiden, The Netherlands
| | - Simone Nicolardi
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics,
Albinusdreef 2, 2300RC Leiden, The Netherlands
| | - Willem Jonker
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics,
Albinusdreef 2, 2300RC Leiden, The Netherlands
| | - Rico Derks
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics,
Albinusdreef 2, 2300RC Leiden, The Netherlands
| | - Magnus Palmblad
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics,
Albinusdreef 2, 2300RC Leiden, The Netherlands
| | - Andreea Ioan-Facsinay
- Leiden University Medical Center (LUMC), Department of Rheumatology, Albinusdreef
2, 2300RC Leiden, The Netherlands
| | - René Toes
- Leiden University Medical Center (LUMC), Department of Rheumatology, Albinusdreef
2, 2300RC Leiden, The Netherlands
| | - Yuri E. M. van der Burgt
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics,
Albinusdreef 2, 2300RC Leiden, The Netherlands
| | - André M. Deelder
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics,
Albinusdreef 2, 2300RC Leiden, The Netherlands
| | - Oleg A. Mayboroda
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics,
Albinusdreef 2, 2300RC Leiden, The Netherlands
| | - Martin Giera
- Leiden University Medical Center (LUMC), Center for Proteomics and Metabolomics,
Albinusdreef 2, 2300RC Leiden, The Netherlands
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36
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Nicolardi S, van der Burgt YEM, Dragan I, Hensbergen PJ, Deelder AM. Identification of new apolipoprotein-CIII glycoforms with ultrahigh resolution MALDI-FTICR mass spectrometry of human sera. J Proteome Res 2013; 12:2260-8. [PMID: 23527852 DOI: 10.1021/pr400136p] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Apolipoprotein-CIII (apoCIII) is an abundant blood glycoprotein associated with lipoprotein particles. Three different glycoforms have been described, all containing a mucin-type core-1 O-glycosylation with either zero, one or two sialic acids. Changes in the relative abundance of these glycoforms have been observed in a variety of different pathologies. In this study, ultrahigh resolution 15T MALDI Fourier transform ion cyclotron resonance (FTICR) MS was used to analyze apoCIII isoforms in serum protein profiles. For this purpose, serum proteins were purified using both a fully automated RPC18-based magnetic bead method and an RPC4 cartridge-based solid phase extraction method. Six new apoCIII isoforms were identified with low-ppm mass measurement errors and ultrahigh precision. These were characterized by more complex glycan moieties that are fucosylated instead of sialylated. To confirm the glycan moiety and localize the glycosylation site, top-down ESI-FTICR-MS/MS and bottom-up LC-ion trap MS/MS were used. A large variation in the presence and abundance of the fucosylated isoforms was found in a set of 96 serum samples. These findings of fucosylated apolipoprotein-CIII isoforms warrant further research to elucidate the implications these glycoforms may have for the plethora of studies where alterations in apoCIII have been linked to the development of many different pathologies.
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Affiliation(s)
- Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Albinusdreef 2, 2300 RC, Leiden, The Netherlands.
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37
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Nicolardi S, van der Burgt YEM, Wuhrer M, Deelder AM. Mapping O-glycosylation of apolipoprotein C-III in MALDI-FT-ICR protein profiles. Proteomics 2013; 13:992-1001. [PMID: 23335445 DOI: 10.1002/pmic.201200293] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 08/29/2012] [Accepted: 10/23/2012] [Indexed: 01/10/2023]
Abstract
Ultrahigh resolution MALDI-FT-ICR profiles were obtained from human serum samples that were processed using a fully automated RPC18-based magnetic bead method. Proteins were profiled from m/z value 6630 with a resolving power of 73 000 up to m/z value 12 600 with a resolving power of 37 000. In this study, a detailed evaluation was performed of the isoforms of apolipoprotein C-III, i.e. the different mucin-type core 1 O-glycans with the addition of one or two sialic acid residues. The MALDI-FT-ICR profiles are discussed with regard to reproducibility of the signal intensities as well as the accurate mass measurements. ESI-FT-ICR-MS/MS analyses of the same serum samples were performed to confirm the identity of apolipoprotein C-III glycoforms.
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Affiliation(s)
- Simone Nicolardi
- Center for Proteomics and Metabolomics, Leiden University Medical Center (LUMC), Leiden, The Netherlands
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Bladergroen MR, Derks RJE, Nicolardi S, de Visser B, van Berloo S, van der Burgt YEM, Deelder AM. Standardized and automated solid-phase extraction procedures for high-throughput proteomics of body fluids. J Proteomics 2012; 77:144-53. [PMID: 22842157 DOI: 10.1016/j.jprot.2012.07.023] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 07/04/2012] [Accepted: 07/16/2012] [Indexed: 01/17/2023]
Abstract
In order to balance the speed of analytical sample preparation procedures with mass spectrometry (MS)-based clinical proteomics the application of high-throughput robotic systems for body fluid workup is essential. In this paper we describe the implementation of various solid-phase extraction (SPE) sample preparation protocols on two different platforms, namely: 1) Magnetic bead-based SPE of peptides and proteins from body fluids on a Hamilton liquid handling workstation; 2) Cartridge-based SPE on a SPARK Symbiosis system. All SPE protocols were optimized for MS-based proteomics and compared with respect to obtained peptide- and protein profiles. Throughput numbers that were achieved in a 24 hour time frame for the sample workup procedures were more than 700 samples for the magnetic bead-based method and over 1000 samples for the cartridge-based method.
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Affiliation(s)
- Marco R Bladergroen
- Leiden University Medical Center (LUMC), Department of Parasitology, Biomolecular Mass Spectrometry Unit, Albinusdreef 2, 2300 RC, Leiden, The Netherlands
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Velstra B, van der Burgt YEM, Mertens BJ, Mesker WE, Deelder AM, Tollenaar RAEM. Improved classification of breast cancer peptide and protein profiles by combining two serum workup procedures. J Cancer Res Clin Oncol 2012; 138:1983-92. [PMID: 22763645 PMCID: PMC3491194 DOI: 10.1007/s00432-012-1273-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 06/15/2012] [Indexed: 12/22/2022]
Abstract
Purpose Detection of breast cancer at early stage increases patient’s survival. Mass spectrometry-based protein analysis of serum samples is a promising approach to obtain biomarker profiles for early detection. A combination of commonly applied solid-phase extraction procedures for clean-up may increase the number of detectable peptides and proteins. In this study, we have evaluated whether the classification performance of breast cancer profiles improves by using two serum workup procedures. Methods Serum samples from 105 breast cancer patients and 202 healthy volunteers were processed according to a standardized protocol implemented on a high-end liquid-handling robot. Peptide and protein enrichments were carried out using weak-cation exchange (WCX) and reversed-phase (RP) C18 magnetic beads. Profiles were acquired on a matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometer. In this way, two different biomarker profiles were obtained for each serum sample, yielding a WCX- and RPC18-dataset. Results The profiles were statistically evaluated with double cross-validation. Classification results of WCX- and RPC18-datasets were determined for each set separately and for the combination of both sets. Sensitivity and specificity were 82 and 87 % (WCX) and 73 and 93 % (RPC18) for the individual workup procedures. These values increased up to 84 and 95 %, respectively, upon combining the data. Conclusion It was found that MALDI-TOF peptide and protein profiles can be used for classification of breast cancer with high sensitivity and specificity. The classification performance even improved when two workup procedures were applied, since these provide a greater number of features (proteins). Electronic supplementary material The online version of this article (doi:10.1007/s00432-012-1273-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Berit Velstra
- Department of Surgery, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA, Leiden, The Netherlands.
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Nicolardi S, Andreoni A, Tabares LC, van der Burgt YEM, Canters GW, Deelder AM, Hensbergen PJ. Top-down FTICR MS for the identification of fluorescent labeling efficiency and specificity of the Cu-protein azurin. Anal Chem 2012; 84:2512-20. [PMID: 22320330 DOI: 10.1021/ac203370f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Fluorescent protein labeling has been an indispensable tool in many applications of biochemical, biophysical, and cell biological research. Although detailed information about the labeling stoichiometry and exact location of the label is often not necessary, for other purposes, this information is crucial. We have studied the potential of top-down electrospray ionization (ESI)-15T Fourier transform ion cyclotron resonance (FTICR) mass spectrometry to study the degree and positioning of fluorescent labeling. For this purpose, we have labeled the Cu-protein azurin with the fluorescent label ATTO 655-N-hydroxysuccinimide(NHS)-ester and fractionated the sample using anion exchange chromatography. Subsequently, individual fractions were analyzed by ESI-15T FTICR to determine the labeling stoichiometry, followed by top-down MS fragmentation, to locate the position of the label. Results showed that, upon labeling with ATTO 655-NHS, multiple different species of either singly or doubly labeled azurin were formed. Top-down fragmentation of different species, either with or without the copper, resulted in a sequence coverage of approximately 50%. Different primary amine groups were found to be (potential) labeling sites, and Lys-122 was identified as the major labeling attachment site. In conclusion, we have demonstrated that anion exchange chromatography in combination with ultrahigh resolution 15T ESI-FTICR top-down mass spectrometry is a valuable tool for measuring fluorescent labeling efficiency and specificity.
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Affiliation(s)
- Simone Nicolardi
- Biomolecular Mass Spectrometry Unit, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
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Nicolardi S, Palmblad M, Hensbergen PJ, Tollenaar RAEM, Deelder AM, van der Burgt YEM. Precision profiling and identification of human serum peptides using Fourier transform ion cyclotron resonance mass spectrometry. Rapid Commun Mass Spectrom 2011; 25:3457-3463. [PMID: 22095492 DOI: 10.1002/rcm.5246] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Many biomarker discovery studies are based on matrix-assisted laser desorption/ionisation (MALDI) peptide profiles. In this study, 96 human serum samples were analysed on a Bruker solariX(TM) MALDI Fourier transform ion cyclotron resonance (FTICR) system equipped with a 15 tesla magnet. Isotopically resolved peptides were observed in ultrahigh resolution FTICR profiles up to m/z 6500 with mass measurement errors (MMEs) of previously identified peptides at a sub-ppm level. For comparison with our previous platform for peptide profile mass analysis (i.e. Ultraflex II) the corresponding time-of-flight (TOF) spectra were obtained with isotopically resolved peptides up to m/z 3500. The FTICR and TOF systems performed rather similar with respect to the repeatability of the signal intensities. However, the mass measurement precision improved at least 10-fold in ultrahigh resolution data and thus simplified spectral alignment necessary for robust and quantitatively precise comparisons of profiles in large-scale clinical studies. From each single MALDI-FTICR spectrum an m/z-list was obtained with sub-ppm precision for all different species, which is beneficial for identification purposes and interlaboratory comparisons. Furthermore, the FTICR system allowed new peptide identifications from collision-induced dissociation (CID) spectra using direct infusion of reversed-phase (RP) C(18)-fractionated serum samples on an electrospray ionisation (ESI) source.
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Affiliation(s)
- Simone Nicolardi
- Department of Parasitology, Leiden University Medical Center (LUMC), Biomolecular Mass Spectrometry Unit, Albinusdreef 2, 2300 RC Leiden, The Netherlands
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Wuhrer M, Deelder AM, van der Burgt YEM. Mass spectrometric glycan rearrangements. Mass Spectrom Rev 2011; 30:664-80. [PMID: 21560141 DOI: 10.1002/mas.20337] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 02/28/2011] [Accepted: 03/28/2011] [Indexed: 05/04/2023]
Abstract
Mass spectrometric rearrangement reactions have been reported for a large variety of compounds such as peptides, lipids, and carbohydrates. In the case of carbohydrates this phenomenon has been described as internal residue loss. Resulting fragment ions may be misinterpreted as fragments arising from conventional glycosidic bond cleavages, which may result in incorrect structural assignment. Therefore, awareness of the occurrence of glycan rearrangements is important for avoiding misinterpretation of tandem mass spectra. In this review mass spectrometric rearrangements of both derivatized and underivatized (native) oligosaccharide structures are discussed. Similar phenomena have been reported for glycopeptides, labeled glycan structures and other biomolecules containing a carbohydrate part. Rearrangements in oligosaccharides and glycoconjugates have been observed with different types of mass spectrometers. Most of the observed carbohydrate rearrangement reactions appear to be linked to the presence of a proton. Hence, tandem mass spectrometric analysis of alkali adducts or deprotonated ions often prevents rearrangement reactions, while they may happen with high efficacy with protonated glycoconjugates.
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Affiliation(s)
- Manfred Wuhrer
- Leiden University Medical Center, Biomolecular Mass Spectrometry Unit, Department of Parasitology, Leiden, The Netherlands.
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Huijbers A, Velstra B, Dekker TJA, Mesker WE, van der Burgt YEM, Mertens BJ, Deelder AM, Tollenaar RAEM. Proteomic serum biomarkers and their potential application in cancer screening programs. Int J Mol Sci 2010; 11:4175-93. [PMID: 21151433 PMCID: PMC3000077 DOI: 10.3390/ijms11114175] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 10/16/2010] [Accepted: 10/18/2010] [Indexed: 02/06/2023] Open
Abstract
Early diagnosis of cancer is of pivotal importance to reduce disease-related mortality. There is great need for non-invasive screening methods, yet current screening protocols have limited sensitivity and specificity. The use of serum biomarkers to discriminate cancer patients from healthy persons might be a tool to improve screening programs. Mass spectrometry based proteomics is widely applied as a technology for mapping and identifying peptides and proteins in body fluids. One commonly used approach in proteomics is peptide and protein profiling. Here, we present an overview of profiling methods that have the potential for implementation in a clinical setting and in national screening programs.
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Affiliation(s)
- Anouck Huijbers
- Department of Surgery, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands; E-Mails: (A.H.); (B.V.); (W.E.M.)
| | - Berit Velstra
- Department of Surgery, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands; E-Mails: (A.H.); (B.V.); (W.E.M.)
| | - Tim J. A. Dekker
- Department of Surgery, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands; E-Mails: (A.H.); (B.V.); (W.E.M.)
| | - Wilma E. Mesker
- Department of Surgery, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands; E-Mails: (A.H.); (B.V.); (W.E.M.)
| | - Yuri E. M. van der Burgt
- Department of Parasitology, Biomolecular Mass Spectrometry Unit, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Bart J. Mertens
- Department of Medical Statistics, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - André M. Deelder
- Department of Parasitology, Biomolecular Mass Spectrometry Unit, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands
| | - Rob A. E. M. Tollenaar
- Department of Surgery, Leiden University Medical Center (LUMC), Albinusdreef 2, 2333 ZA Leiden, The Netherlands; E-Mails: (A.H.); (B.V.); (W.E.M.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +317-152-636-10
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Blanckenburg B, van der Burgt YEM, Deelder AM, Palmblad M. "Lossless" compression of high resolution mass spectra of small molecules. Metabolomics 2010; 6:335-340. [PMID: 20676216 PMCID: PMC2899016 DOI: 10.1007/s11306-010-0202-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Accepted: 02/10/2010] [Indexed: 01/30/2023]
Abstract
Fourier transform ion cyclotron resonance (FTICR) provides the highest resolving power of any commercially available mass spectrometer. This advantage is most significant for species of low mass-to-charge ratio (m/z), such as metabolites. Unfortunately, FTICR spectra contain a very large number of data points, most of which are noise. This is most pronounced at the low m/z end of spectra, where data point density is the highest but peak density low. We therefore developed a filter that offers lossless compression of FTICR mass spectra from singly charged metabolites. The filter relies on the high resolving power and mass measurement precision of FTICR and removes only those m/z channels that cannot contain signal from singly charged organic species. The resulting pseudospectra still contain the same signal as the original spectra but less uninformative background. The filter does not affect the outcome of standard downstream chemometric analysis methods, such as principal component analysis, but use of the filter significantly reduces memory requirements and CPU time for such analyses. We demonstrate the utility of the filter for urinary metabolite profiling using direct infusion electrospray ionization and a 15 tesla FTICR mass spectrometer. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11306-010-0202-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Bo Blanckenburg
- Biomolecular Mass Spectrometry Unit, Department of Parasitology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands
| | - Yuri E. M. van der Burgt
- Biomolecular Mass Spectrometry Unit, Department of Parasitology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands
| | - André M. Deelder
- Biomolecular Mass Spectrometry Unit, Department of Parasitology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands
| | - Magnus Palmblad
- Biomolecular Mass Spectrometry Unit, Department of Parasitology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands
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Nicolardi S, Palmblad M, Dalebout H, Bladergroen M, Tollenaar RAEM, Deelder AM, van der Burgt YEM. Quality control based on isotopic distributions for high-throughput MALDI-TOF and MALDI-FTICR serum peptide profiling. J Am Soc Mass Spectrom 2010; 21:1515-1525. [PMID: 20541438 DOI: 10.1016/j.jasms.2010.05.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 04/23/2010] [Accepted: 05/06/2010] [Indexed: 05/29/2023]
Abstract
In this study, we have implemented a new quality control (QC) parameter for peptide profiling based on isotopic distributions. This QC parameter is an objective measure and facilitates automatic sorting of large numbers of peptide spectra. Peptides in human serum samples were enriched using reversed-phase C(18)-functionalized magnetic beads using a high-throughput robotic platform. High-resolution MALDI-TOF and ultrahigh resolution MALDI-FTICR mass spectra were obtained and a workflow was developed for automated analysis and evaluation of these profiles. To this end, the isotopic distributions of multiple peptides were quantified from both MALDI-TOF and MALDI-FTICR spectra. Odd peptide isotope distributions in TOF spectra could be rationalized from ultrahigh resolution FTICR spectra that showed overlap of different peptides. The comparison of isotope patterns with estimated polyaveragine distributions was used to calculate a QC value for each single mass spectrum. Sorting these QC values enabled the best MALDI spectrum to be selected from replicate spots. Moreover, using this approach spectra containing high intensities of polymers or other contaminants and lacking peptides of interest can be efficiently removed from a clinical dataset. In general, this method simplifies the exclusion of low quality spectra from further statistical analysis.
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Affiliation(s)
- Simone Nicolardi
- Department of Parasitology, Biomolecular Mass Spectrometry Unit, Leiden University Medical Center, Leiden, The Netherlands
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Palmblad M, van der Burgt YEM, Mostovenko E, Dalebout H, Deelder AM. A novel mass spectrometry cluster for high-throughput quantitative proteomics. J Am Soc Mass Spectrom 2010; 21:1002-1011. [PMID: 20194034 DOI: 10.1016/j.jasms.2010.02.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2009] [Revised: 02/01/2010] [Accepted: 02/01/2010] [Indexed: 05/28/2023]
Abstract
We have developed and implemented a novel mass spectrometry (MS) platform combining the advantages of high mass accuracy and resolving power of Fourier transform ion cyclotron resonance (FTICR) with the economy and speed of multiple ion traps for tandem mass spectrometry. The instruments are integrated using novel algorithms and software and work in concert as one system. Using chromatographic time compression, a single expensive FTICR mass spectrometer can match the throughput of multiple relatively inexpensive ion trap instruments. Liquid chromatography (LC)-mass spectrometry data from the two types of spectrometers are aligned and combined to hybrid datasets, from which peptides are identified using accurate mass from the FTICR data and tandem mass spectra from the ion trap data. In addition, the high resolving power and dynamic range of a 12 tesla FTICR also allows precise label-free quantitation. Using two ion traps in parallel with one LC allows simultaneous MS/MS experiments and optimal application of collision induced dissociation and electron-transfer dissociation throughout the chromatographic separation for increased proteome coverage, characterization of post-translational modifications and/or simultaneous measurement in positive and negative ionization mode. An FTICR-ion trap cluster can achieve similar performance and sample throughput as multiple hybrid ion trap-FTICR instruments, but at a lower cost. We here describe the first such FTICR-ion trap cluster, its performance and the idea of chromatographic compression.
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Affiliation(s)
- Magnus Palmblad
- Biomolecular Mass Spectrometry Unit, Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.
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Barbu IMT, Smith DF, van Breukelen B, van der Burgt YEM, Duursma MC, Heck AJR, Heeren RMA, Krijgsveld J. On-the-fly targeted selection of labeled peptides in liquid chromatography/mass spectrometry based quantitative proteomics. Rapid Commun Mass Spectrom 2010; 24:239-241. [PMID: 20013948 DOI: 10.1002/rcm.4385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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48
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Palmblad M, van der Burgt YEM, Dalebout H, Derks RJE, Schoenmaker B, Deelder AM. Improving mass measurement accuracy in mass spectrometry based proteomics by combining open source tools for chromatographic alignment and internal calibration. J Proteomics 2009; 72:722-4. [PMID: 19167529 DOI: 10.1016/j.jprot.2008.12.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Accepted: 12/31/2008] [Indexed: 10/21/2022]
Abstract
Accurate mass determination enhances peptide identification in mass spectrometry based proteomics. We here describe the combination of two previously published open source software tools to improve mass measurement accuracy in Fourier transform ion cyclotron resonance mass spectrometry (FTICRMS). The first program, msalign, aligns one MS/MS dataset with one FTICRMS dataset. The second software, recal2, uses peptides identified from the MS/MS data for automated internal calibration of the FTICR spectra, resulting in sub-ppm mass measurement errors.
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Affiliation(s)
- Magnus Palmblad
- Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.
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van der Burgt YEM, Palmblad M, Dalebout H, Heeren RMA, Deelder AM. Electron capture dissociation of peptide hormone changes upon opening of the tocin ring and complexation with transition metal cations. Rapid Commun Mass Spectrom 2009; 23:31-38. [PMID: 19051230 DOI: 10.1002/rcm.3849] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Electron capture dissociation (ECD) is an analytical technique in mass spectrometry (MS) that allows detailed structural study of biomolecules to gain insight in their function. In this work the ECD behavior of two peptide hormones oxytocin (OT1) and vasopressin (VP1) was studied. The results of OT1 and VP1 were compared to structural analogues OT2 and VP2, which have similar amino acid sequences but lack the tocin ring. The ECD results showed that both the fragment type (c/z versus b/y) and the cleavage sites (ring versus tail) changed upon opening of the tocin ring. All four peptides were complexed with three different transition metal cations (Zn(2+), Ni(2+) and Cu(2+)) and the ECD results were compared to those obtained from the doubly protonated species. The use of various metal ions yielded different cleavages sites within the same peptide. This can be an effect of the metal ion itself, or a consequence of a change in conformation as was suggested earlier. In addition, the type of fragment ion varied for each metal-complexed peptide, which is in agreement with previous observations.
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Affiliation(s)
- Yuri E M van der Burgt
- Department of Parasitology, Leiden University Medical Center (LUMC), Leiden, The Netherlands.
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50
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Taban IM, van der Burgt YEM, Duursma M, Takáts Z, Seynen M, Konijnenburg M, Vijftigschild A, Attema I, Heeren RMA. A novel workflow control system for Fourier transform ion cyclotron resonance mass spectrometry allows for unique on-the-fly data-dependent decisions. Rapid Commun Mass Spectrom 2008; 22:1245-56. [PMID: 18383214 DOI: 10.1002/rcm.3440] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
In this paper a novel workflow-based data acquisition and control system for Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) is presented that facilitates a fast on-the-fly decision-making process for a wide variety of data-dependent experiments. Several new workflow implementations demonstrate the flexibility and benefit of this approach for rapid dynamic experimental design on a chromatographic timescale. The different sequence, evaluation, decision and monitoring modules are described using a selected set of examples. During a tandem liquid chromatography (LC)/FTICR-MS experiment the system is used to dynamically switch between various dissociation techniques such as electron capture dissociation (ECD) and sustained off-resonance irradiation (SORI) depending on the charge state of a tryptic peptide peak. The use of this workflow-based system for imaging FTICR-MS using a desorption electrospray ionization (DESI) source demonstrates the possibility of external control of the workflow by feedback from an imaging sample stage.
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Affiliation(s)
- Ioana M Taban
- FOM Institute for Atomic and Molecular Physics (FOM-AMOLF), Kruislaan 407, Amsterdam, The Netherlands
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