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Quantification of Proteins in Blood by Absorptive Microtiter Plate-Based Affinity Purification Coupled to Liquid Chromatography-Mass Spectrometry. Methods Mol Biol 2023; 2628:221-233. [PMID: 36781789 DOI: 10.1007/978-1-0716-2978-9_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Liquid chromatography (LC) coupled to mass spectrometry (MS) is increasingly used for quantification of proteins in blood. This development is prompted by ongoing improvements in detection sensitivities of LC-MS instruments and corresponding sample preparation workflows. The combination of immunoaffinity enrichment and targeted LC-MS detection is a notable analytical platform in this regard as it allows for the quantification of low abundance proteins in biological matrices like plasma and serum. Here, we describe such hybrid methods which are based on the enrichment of proteins with antibodies or affimers coupled to adsorptive microtiter plates, the proteolytic digestion of enriched proteins to release protein-specific peptides, and the detection of these peptides by microflow LC coupled to selected reaction monitoring MS.
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2
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Large molecule bioanalysis by LC-MS: beyond simply quantifying. Bioanalysis 2022; 14:397-400. [PMID: 35249374 DOI: 10.4155/bio-2022-0032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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3
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Klont F, Pouwels SD, Bults P, van de Merbel NC, ten Hacken NH, Horvatovich P, Bischoff R. Quantification of surfactant protein D (SPD) in human serum by liquid chromatography-mass spectrometry (LC-MS). Talanta 2019; 202:507-513. [DOI: 10.1016/j.talanta.2019.05.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/01/2019] [Accepted: 05/03/2019] [Indexed: 01/02/2023]
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4
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Willems E, Alkema W, Keizer-Garritsen J, Suppers A, van der Flier M, Philipsen RHLA, van den Heuvel LP, Volokhina E, van der Molen RG, Herberg JA, Levin M, Wright VJ, Ahout IML, Ferwerda G, Emonts M, Boeddha NP, Rivero-Calle I, Torres FM, Wessels HJCT, de Groot R, van Gool AJ, Gloerich J, de Jonge MI. Biosynthetic homeostasis and resilience of the complement system in health and infectious disease. EBioMedicine 2019; 45:303-313. [PMID: 31262714 PMCID: PMC6642076 DOI: 10.1016/j.ebiom.2019.06.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/06/2019] [Accepted: 06/06/2019] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND The complement system is a central component of the innate immune system. Constitutive biosynthesis of complement proteins is essential for homeostasis. Dysregulation as a consequence of genetic or environmental cues can lead to inflammatory syndromes or increased susceptibility to infection. However, very little is known about steady state levels in children or its kinetics during infection. METHODS With a newly developed multiplex mass spectrometry-based method we analyzed the levels of 32 complement proteins in healthy individuals and in a group of pediatric patients infected with bacterial or viral pathogens. FINDINGS In plasma from young infants we found reduced levels of C4BP, ficolin-3, factor B, classical pathway components C1QA, C1QB, C1QC, C1R, and terminal pathway components C5, C8, C9, as compared to healthy adults; whereas the majority of complement regulating (inhibitory) proteins reach adult levels at very young age. Both viral and bacterial infections in children generally lead to a slight overall increase in complement levels, with some exceptions. The kinetics of complement levels during invasive bacterial infections only showed minor changes, except for a significant increase and decrease of CRP and clusterin, respectively. INTERPRETATION The combination of lower levels of activating and higher levels of regulating complement proteins, would potentially raise the threshold of activation, which might lead to suppressed complement activation in the first phase of life. There is hardly any measurable complement consumption during bacterial or viral infection. Altogether, expression of the complement proteins appears surprisingly stable, which suggests that the system is continuously replenished. FUND: European Union's Horizon 2020, project PERFORM, grant agreement No. 668303.
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Affiliation(s)
- Esther Willems
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands; Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands; Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands.
| | - Wynand Alkema
- Centre for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jenneke Keizer-Garritsen
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Anouk Suppers
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Michiel van der Flier
- Department of Pediatrics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Ria H L A Philipsen
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands; Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Lambert P van den Heuvel
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands; Amalia Children's Hospital, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Elena Volokhina
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands; Amalia Children's Hospital, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Renate G van der Molen
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jethro A Herberg
- Department of Medicine, Section for Paediatrics, Imperial College London, London, UK
| | - Michael Levin
- Department of Medicine, Section for Paediatrics, Imperial College London, London, UK
| | - Victoria J Wright
- Department of Medicine, Section for Paediatrics, Imperial College London, London, UK
| | - Inge M L Ahout
- Amalia Children's Hospital, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Gerben Ferwerda
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands; Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Marieke Emonts
- Department of Paediatric Immunology, Infectious Diseases and Allergy, Great North Children's Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK; Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK; NIHR Newcastle Biomedical Research Centre based at Newcastle upon Tyne Hospitals NHS Trust and Newcastle University, Newcastle upon Tyne, UK
| | - Navin P Boeddha
- Intensive Care and Department of Pediatric Surgery, Erasmus MC-Sophia Children's Hospital, University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Irene Rivero-Calle
- Translational Pediatrics and Infectious Diseases, Hospital Clínico Universitario de Santiago, Instituto de Investigación Sanitaria de Santiago, Santiago de Compostela, Galicia, Spain
| | - Federico Martinon Torres
- Translational Pediatrics and Infectious Diseases, Hospital Clínico Universitario de Santiago, Instituto de Investigación Sanitaria de Santiago, Santiago de Compostela, Galicia, Spain
| | - Hans J C T Wessels
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Ronald de Groot
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands; Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Alain J van Gool
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Jolein Gloerich
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Marien I de Jonge
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands; Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
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5
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Klont F, Joosten MR, Ten Hacken NHT, Horvatovich P, Bischoff R. Quantification of the soluble Receptor of Advanced Glycation End-Products (sRAGE) by LC-MS after enrichment by strong cation exchange (SCX) solid-phase extraction (SPE) at the protein level. Anal Chim Acta 2018; 1043:45-51. [PMID: 30392668 DOI: 10.1016/j.aca.2018.09.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 09/14/2018] [Accepted: 09/20/2018] [Indexed: 12/26/2022]
Abstract
The study of low abundant proteins contributes to increasing our knowledge about (patho)physiological processes and may lead to the identification and clinical application of disease markers. However, studying these proteins is challenging as high-abundant proteins complicate their analysis. Antibodies are often used to enrich proteins from biological matrices prior to their analysis, though antibody-free approaches have been described for some proteins as well. Here we report an antibody-free workflow on the basis of strong cation exchange (SCX) enrichment and liquid chromatography-mass spectrometry (LC-MS) for quantification of the soluble Receptor of Advanced Glycation End-products (sRAGE), a promising biomarker in chronic obstructive pulmonary disease (COPD). sRAGE was quantified in serum at clinically relevant low to sub ng mL-1 levels. The method was validated according to U.S. Food and Drug Administration (FDA) and European Medicines Agency (EMA) guidelines and was compared to an antibody-based LC-MS sRAGE method. The SCX-based method builds upon the bipolar charge distribution of sRAGE, which has a highly basic N-terminal part and an acidic C-terminal part resulting in an overall neutral isoelectric point (pI). The highly basic N-terminal part (pIcalculated = 10.3) allowed for sRAGE to be enriched by SCX at pH 10, a pH at which most serum proteins do not bind. This study shows that ion exchange-based enrichment is a viable approach for the LC-MS analysis of several low abundant proteins following a thorough analysis of their physical-chemical properties.
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Affiliation(s)
- Frank Klont
- Department of Analytical Biochemistry, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, the Netherlands
| | - Marc R Joosten
- Department of Analytical Biochemistry, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, the Netherlands
| | - Nick H T Ten Hacken
- Department of Pulmonary Diseases, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ, Groningen, the Netherlands
| | - Péter Horvatovich
- Department of Analytical Biochemistry, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, the Netherlands
| | - Rainer Bischoff
- Department of Analytical Biochemistry, Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, the Netherlands.
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6
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Liu A, Shan H, Ma M, Shangguan L, Jiang K, Shi M, Zhao Y, Liu S, Li S. An ultrasensitive photoelectrochemical immunosensor by integration of nanobody, TiO 2 nanorod arrays and ZnS nanoparticles for the detection of tumor necrosis factor-α. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.09.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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7
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Gilquin B, Louwagie M, Jaquinod M, Cez A, Picard G, El Kholy L, Surin B, Garin J, Ferro M, Kofman T, Barau C, Plaisier E, Ronco P, Brun V. Multiplex and accurate quantification of acute kidney injury biomarker candidates in urine using Protein Standard Absolute Quantification (PSAQ) and targeted proteomics. Talanta 2017; 164:77-84. [DOI: 10.1016/j.talanta.2016.11.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 11/09/2016] [Accepted: 11/12/2016] [Indexed: 01/15/2023]
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8
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Reagent-free LC–MS/MS-based pharmacokinetic quantification of polyhistidine-tagged therapeutic proteins. Bioanalysis 2017; 9:251-264. [DOI: 10.4155/bio-2016-0126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Aim: Immobilized metal ion affinity chromatography is widely employed for purifying polyhistidine-tagged recombinant proteins from cell lysates. The technique can be applied for quantification of therapeutic proteins in biological matrices by LC–MS/MS. Results: A protein reagent-free workflow was developed for quantifying polyhistidine-tagged proteins by LC–MS/MS. The workflow includes target protein enrichment by immobilized metal ion affinity chromatography, on-bead trypsin digestion and quantification of signature peptides by LC–MS/MS. It was applied to quantify a 6×His-tagged protein in a mouse pharmacokinetic study with assay sensitivity of 10.0 ng/ml and linearity up to 10,000 ng/ml. Conclusion: The protein reagent-free workflow developed herein can overcome reagent limitation and serve as a viable approach for quantifying polyhistidine-tagged therapeutic proteins to support discovery pharmacokinetic and pharmacodynamic studies.
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9
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Highly sensitive antibody-free μLC–MS/MS quantification of rhTRAIL in serum. Bioanalysis 2016; 8:881-90. [DOI: 10.4155/bio.16.30] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Background: We describe an antibody-free approach to quantify rhTRAILWT (wild-type) and its closely related death receptor 4 selective variant rhTRAIL4C7 in human and murine serum by multiplex LC–MS/MS on a microfluidics interface. Methodology: Enrichment of rhTRAIL was performed by strong cation-exchange (SCX) followed by immobilized metal affinity (IMAC) solid-phase extraction. This was followed by trypsin digestion and using methionine-containing signature peptides after fully oxidizing the methionine residue with 0.25% (w/w) hydrogen peroxide. Conclusion: Absolute quantification was reaching down to 0.5 ng/ml for rhTRAILWT (8.5 pM) and 2 ng/ml for rhTRAIL4C7 (34 pM) in 100 μl human serum. To support preclinical studies in mice, the analysis was optimized further, for a sample volume of 20 μl murine serum.
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10
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Wilffert D, Donzelli R, Asselman A, Hermans J, Govorukhina N, Ten Hacken NH, Quax WJ, van de Merbel NC, Bischoff R. Quantitative antibody-free LC-MS/MS analysis of sTRAIL in sputum and saliva at the sub-ng/mL level. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1032:205-210. [PMID: 27250581 DOI: 10.1016/j.jchromb.2016.04.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/22/2016] [Indexed: 11/28/2022]
Abstract
Soluble tumor necrosis factor-related apoptosis-inducing ligand (sTRAIL) induces apoptosis via the extrinsic death receptor pathway and may be a biomarker in the pathogenesis of a broad range of diseases. To investigate the role of sTRAIL in asthma, we developed a quantitative LC-MS/MS method with a lower limit of quantitation (LLOQ) of ≈3pM in induced sputum (174pg/mL) and saliva (198pg/mL) without the use of antibodies. sTRAIL was enriched by immobilized metal affinity chromatography (IMAC) solid-phase extraction (SPE) followed by tryptic digestion and subsequent enrichment of a signature peptide by strong cation exchange (SCX) SPE. The method was validated with respect to stability, accuracy and precision using the standard addition approach and fully metabolically (15)N-labelled hrTRAIL as internal standard. Our results indicate that it is possible to quantify cytokines like sTRAIL at the pM level by LC-MS/MS without the use of antibodies, which has, to our knowledge, never been shown before.
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Affiliation(s)
- Daniel Wilffert
- Analytical Biochemistry, Department of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Riccardo Donzelli
- Department of Pathology, University of Pisa, Via Roma 55, 56126 Pisa, Italy
| | - Angela Asselman
- Analytical Biochemistry, Department of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Jos Hermans
- Analytical Biochemistry, Department of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Natalia Govorukhina
- Analytical Biochemistry, Department of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Nick H Ten Hacken
- Department of Pulmonology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Wim J Quax
- Pharmaceutical Biology, Department of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Nico C van de Merbel
- Analytical Biochemistry, Department of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands; PRA Health Sciences, Bioanalytical Laboratory, Amerikaweg 18, 9407 TK Assen, The Netherlands
| | - Rainer Bischoff
- Analytical Biochemistry, Department of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands.
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11
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D'Urzo A, Boichenko AP, van den Bosch T, Hermans J, Dekker F, Andrisano V, Bischoff R. Site-specific quantification of lysine acetylation in the N-terminal tail of histone H4 using a double-labelling, targeted UHPLC MS/MS approach. Anal Bioanal Chem 2016; 408:3547-53. [PMID: 26968571 PMCID: PMC4837199 DOI: 10.1007/s00216-016-9431-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 02/12/2016] [Accepted: 02/17/2016] [Indexed: 02/04/2023]
Abstract
We developed a targeted liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the site-specific quantification of lysine acetylation in the N-terminal region of histone H4 by combining chemical derivatization at the protein and peptide levels with digestion using chymotrypsin and trypsin. Unmodified ε-amino groups were first modified with propionic acid anhydride and the derivatized protein digested with trypsin and chymotrypsin. The newly formed peptide N-termini were subjected to a second derivatization step with d6- (heavy) or d0- (light) acetic acid anhydride. Samples were mixed at different ratios and peptides monitored by multiple reaction monitoring (MRM) LC-MS/MS. The method was validated in terms of linearity (R2 ≥ 0.94), precision (RSD ≤ 10 %), and accuracy (≤27 %) and used to assess the effect of the histone deacetylase (HDAC) inhibitors SAHA and MS-275 in the murine macrophage-like cell line RAW 264.7. SAHA and MS-275 showed site-specific effects on the acetylation levels of K5 and K8 with the K5(Ac)–K8 and K5–K8(Ac) peptides increasing 2.5-fold and 5-fold upon treatment with SAHA and MS-275, respectively. Assessing lysine acetylation in a site-specific manner is important for gaining a better understanding of the effects of HDAC inhibitors and for clarifying disease mechanisms where lysine acetylation plays a role.
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Affiliation(s)
- Annalisa D'Urzo
- Department of Analytical Biochemistry, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands.,Department for Life Quality Studies, Alma Mater Studiorum-University of Bologna, Corso di Augusto, 237-47921, Rimini, Italy
| | - Alexander P Boichenko
- Department of Analytical Biochemistry, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Thea van den Bosch
- Department of Pharmaceutical Gene Modulation, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Jos Hermans
- Department of Analytical Biochemistry, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Frank Dekker
- Department of Pharmaceutical Gene Modulation, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Vincenza Andrisano
- Department for Life Quality Studies, Alma Mater Studiorum-University of Bologna, Corso di Augusto, 237-47921, Rimini, Italy
| | - Rainer Bischoff
- Department of Analytical Biochemistry, University of Groningen, Antonius Deusinglaan 1, 9713 AV, Groningen, The Netherlands.
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12
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Hetero-modification of TRAIL trimer for improved drug delivery and in vivo antitumor activities. Sci Rep 2015; 5:14872. [PMID: 26445897 PMCID: PMC4597189 DOI: 10.1038/srep14872] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 09/10/2015] [Indexed: 01/20/2023] Open
Abstract
Poor pharmacokinetics and resistance within some tumor cell lines have been the major obstacles during the preclinical or clinical application of TRAIL (tumor-necrosis-factor (TNF)-related apoptosis-inducing ligand). The half-life of TRAIL114-281 (114 to 281 amino acids) was revealed to be no more than 30 minutes across species. Therefore maleimido activated PEG (polyethylene glycol) and MMAE (Monomethyl Auristatin E) were applied to site-specifically conjugate with the mutated cysteines from different monomers of TRAIL successively, taking advantage of steric effects involved within TRAIL mutant conjugations. As a result, TRAIL trimer was hetero-modified for different purposes. And the resulting PEG-TRAIL-vcMMAE conjugate exhibited dramatically improved half-life (11.54 h), favourable in vivo targeting capability and antitumor activities while no sign of toxicity in xenograft models, suggesting it’s a viable therapeutic and drug delivery strategy.
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13
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Bults P, van de Merbel NC, Bischoff R. Quantification of biopharmaceuticals and biomarkers in complex biological matrices: a comparison of liquid chromatography coupled to tandem mass spectrometry and ligand binding assays. Expert Rev Proteomics 2015; 12:355-74. [DOI: 10.1586/14789450.2015.1050384] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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14
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Abstract
Antibody-free approaches for quantitative LC–MS/MS-based protein bioanalysis are reviewed and critically evaluated, and compared with the more widely used immunoaffinity-based approaches. Antibody-free workflows will be divided into four groups and discussed in the following order: direct analysis of signature peptides after proteolytic digestion; enrichment of target proteins and signature peptides by fractionated protein precipitation; enrichment of target proteins and signature peptides by reversed-phase and ion-exchange solid-phase extraction; and enrichment of target proteins and signature peptides by (antibody-free) affinity-solid-phase extraction.
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15
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Rossetti C, Abdel Qader A, Halvorsen TG, Sellergren B, Reubsaet L. Antibody-Free Biomarker Determination: Exploring Molecularly Imprinted Polymers for Pro-Gastrin Releasing Peptide. Anal Chem 2014; 86:12291-8. [DOI: 10.1021/ac503559c] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Cecilia Rossetti
- Department
of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo, NO-0316 Oslo, Norway
| | - Abed Abdel Qader
- Department
of Environmental Chemistry and Analytical Chemistry,
Institute for Environmental Research (INFU), Technical University of Dortmund, D-44221 Dortmund, Germany
| | - Trine Grønhaug Halvorsen
- Department
of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo, NO-0316 Oslo, Norway
| | - Börje Sellergren
- Department
of Environmental Chemistry and Analytical Chemistry,
Institute for Environmental Research (INFU), Technical University of Dortmund, D-44221 Dortmund, Germany
- Department
of Biomedical Sciences, Faculty of Health and Society, University of Malmö, 205 06 Malmö, Sweden
| | - Léon Reubsaet
- Department
of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo, NO-0316 Oslo, Norway
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16
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Adaway JE, Keevil BG, Owen LJ. Liquid chromatography tandem mass spectrometry in the clinical laboratory. Ann Clin Biochem 2014; 52:18-38. [DOI: 10.1177/0004563214557678] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Clinical laboratory medicine has seen the introduction and evolution of liquid chromatography tandem mass spectrometry in routine clinical laboratories over the last 10–15 years. There still exists a wide diversity of assays from very esoteric and highly specialist manual assays to more simplified kit-based assays. The technology is not static as manufacturers are continually making improvements. Mass spectrometry is now commonly used in several areas of diagnostics including therapeutic drug monitoring, toxicology, endocrinology, paediatrics and microbiology. Some of the most high throughput analyses or common analytes include vitamin D, immunosuppressant monitoring, androgen measurement and newborn screening. It also offers flexibility for the measurement of analytes in a variety of different matrices which would prove difficult with immunoassays. Unlike immunoassays or high-pressure liquid chromatography assays using ultraviolet or fluorescence detection, mass spectrometry offers better specificity and reduced interferences if attention is paid to potential isobaric compounds. Furthermore, multiplexing, which enables multiple analytes to be measured with the same volume of serum is advantageous, and the requirement for large sample volumes is decreasing as instrument sensitivity increases. There are many emerging applications in the literature. Using mass spectrometry to identify novel isoforms or modified peptides is possible as is quantification of proteins and peptides, with or without protein digests. Future developments by the manufacturers may also include mechanisms to improve the throughput of samples and strategies to decrease the level of skill required by the operators.
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Affiliation(s)
- Joanne E Adaway
- Biochemistry Department, University Hospital of South Manchester, Manchester, UK
- Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Brian G Keevil
- Biochemistry Department, University Hospital of South Manchester, Manchester, UK
- Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Laura J Owen
- Biochemistry Department, University Hospital of South Manchester, Manchester, UK
- Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
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17
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Nouri-Nigjeh E, Zhang M, Ji T, Yu H, An B, Duan X, Balthasar J, Johnson RW, Qu J. Effects of calibration approaches on the accuracy for LC-MS targeted quantification of therapeutic protein. Anal Chem 2014; 86:3575-84. [PMID: 24611550 PMCID: PMC3982980 DOI: 10.1021/ac5001477] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
![]()
LC–MS
provides a promising alternative to ligand-binding
assays for quantification of therapeutic proteins and biomarkers.
As LC–MS methodology is based on the analysis of proteolytic
peptides, calibration approaches utilizing various calibrators and
internal standards (I.S.) have been developed. A comprehensive assessment
of the accuracy and reliability of these approaches is essential but
has yet been reported. Here we performed a well-controlled and systematic
comparative study using quantification of monoclonal-antibody in plasma
as the model system. Method development utilized a high-throughput
orthogonal-array-optimization, and two sensitive and stable signature-peptides
(SP) from different domains were selected based on extensive evaluations
in plasma matrix. With the purities of all protein/peptide standards
corrected by quantitative amino acid analysis (AAA), five calibration
approaches using stable-isotope-labeled (SIL) I.S. were thoroughly
compared, including those at peptide, extended-peptide, and protein
levels and two “hybrid” approaches (i.e., protein calibrator
with SIL-peptide or SIL-extended-peptide I.S.). These approaches were
further evaluated in parallel for a 15 time point, preclinical pharmacokinetic
study. All methods showed good precision (CV% < 20%). When examined
with protein-spiked plasma QC, peptide-level calibration exhibited
severe negative biases (−23 to −62%), highly discordant
results between the two SP (deviations of 38–56%), and misleading
pharmacokinetics assessments. Extended-peptide calibration showed
significant improvements but still with unacceptable accuracy. Conversely,
protein-level and the two hybrid calibrations achieved good quantitative
accuracy (error < 10%), concordant results by two SP (deviations
< 15%), and correct pharmacokinetic parameters. Hybrid approaches
were found to provide a cost-effective means for accurate quantification
without the costly SIL-protein. Other key findings include (i) using
two SP provides a versatile gauge for method reliability; (ii) evaluation
of peptide stability in the matrix before SP selection is critical;
and (iii) using AAA to verify purities of protein/peptide calibrators
ensures accurate quantitation. These results address fundamental calibration
issues that have not been adequately investigated in published studies
and will provide valuable guidelines for the “fit for purpose”
development of accurate LC–MS assays for therapeutic proteins
and biomarkers in biological matrices.
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Affiliation(s)
- Eslam Nouri-Nigjeh
- The Department of Pharmaceutical Sciences, University at Buffalo, State University of New York , Amherst, NY 14260, United States
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