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The Pharmacokinetics in Mice and Cell Uptake of Thymus Immunosuppressive Pentapeptide Using LC-MS/MS Analysis. Molecules 2022; 27:molecules27134256. [PMID: 35807500 PMCID: PMC9268305 DOI: 10.3390/molecules27134256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 06/24/2022] [Accepted: 06/26/2022] [Indexed: 11/17/2022] Open
Abstract
Thymus immunosuppressive pentapeptide (TIPP) is a novel anti-inflammatory peptide with high efficacy and low toxicity. This study aims to establish a selective LC-MS/MS method for analyzing the analyte TIPP in biological samples, laying the foundation for further PK and PD studies of TIPP. Protein precipitation was conducted in acetonitrile supplemented with 2% formic acid and 25 mg/mL dithiothreitol as a stabilizer, which was followed by backwashing the organic phase using dichloromethane. The chromatographic separation of TIPP was achieved on a C18 column with a gradient elution method. During positive electrospray ionization, TIPP was analyzed via multiple-reaction monitoring. The linear relationships between the concentration of TIPP and peak area in murine plasma cell lysates, supernatants, and the final cell rinse PBS were established within the ranges of 20−5000 ng/mL, 1−200 ng/mL, 10−200 μg/mL, and 0.1−20 ng/mL, respectively (r2 > 0.99). Validated according to U.S. FDA guidelines, the proposed method was proved to be acceptable. Such a method had been successfully applied to investigate the pharmacokinetics of TIPP in mice via subcutaneous injection. The plasma half-life in mice was 5.987 ± 1.824 min, suggesting that TIPP is swiftly eliminated in vivo. The amount of TIPP uptake by RBL-2H3 cells was determined using this method, which was also visually verified by confocal. Furthermore, the effective intracellular concentration of TIPP was deduced by comparing the intracellular concentration of TIPP and degrees of inflammation, enlightening further investigation on the intracellular target and mechanism of TIPP.
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2
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Robust analysis of angiotensin peptides in human plasma: Column switching-parallel LC/ESI-SRM/MS without adsorption or enzymatic decomposition. Anal Biochem 2021; 630:114327. [PMID: 34364857 DOI: 10.1016/j.ab.2021.114327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/30/2021] [Accepted: 08/02/2021] [Indexed: 11/20/2022]
Abstract
Angiotensin (Ang) peptides are the main effectors of the renin-angiotensin system (RAS) regulating diverse physiological conditions and are involved in renal and vascular diseases. Currently, quantitative analyses of Ang peptides in human plasma mainly rely on radioimmunoassay-based methods whose reported levels are quite divergent. Analyses are further complicated by the potential of Ang peptides to bind to solid surfaces, to be enzymatically decomposed during sample preparation, and to undergo post-translational modifications. A column switching-parallel LC/ESI-SRM/MS method has been developed for seven Ang peptides (Ang I, Ang II, Ang III, Ang IV, Ang 1-9, Ang 1-7, and Ang A) in human plasma. Aqueous acetonitrile (5%) containing 50 mM arginine (Arg) as a dissolving solution and a combination of protease inhibitors with formic acid were used to prevent adsorption and enzymatic degradation, respectively. Plasma samples were simply deproteinized with acetonitrile followed by clean-up with an on-line trap column via column-switching. Stable isotope dilution with [13C5,15N1-Val]-Ang peptides as internal standards was employed for quantitative analysis. The current methodology has been successfully applied to determine the plasma levels of Ang peptides in healthy participants, suggesting future applicability to studies of various diseases related to RAS.
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3
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He C, Hu S, Zhou W. Development of a novel nanoflow liquid chromatography-parallel reaction monitoring mass spectrometry-based method for quantification of angiotensin peptides in HUVEC cultures. PeerJ 2020; 8:e9941. [PMID: 32983648 PMCID: PMC7500351 DOI: 10.7717/peerj.9941] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 08/24/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND This study aimed to develop an analytical method using liquid chromatography tandem mass spectrometry (LC-MS/MS) for the determination of angiotensin (Ang) I, Ang (1-9), Ang II, Ang (1-7), Ang (1-5), Ang III, Ang IV in human umbilical vein endothelial cell (HUVEC) culture supernatant. METHODS HUVEC culture supernatant was added with gradient concentrations (0.05-1,000 ng/ml) of standard solutions of the Ang peptides. These samples underwent C18 solid-phase extraction and separation using a preconcentration nano-liquid chromatography mass spectrometry system. The target peptides were detected by a Q Exactive quadrupole orbitrap high-resolution mass spectrometer in the parallel reaction monitoring mode. Ang converting enzyme (ACE) in HUVECs was silenced to examine Ang I metabolism. RESULTS The limit of detection was 0.1 pg for Ang II and Ang III, and 0.5 pg for Ang (1-9), Ang (1-7), and Ang (1-5). The linear detection range was 0.1-2,000 pg (0.05-1,000 ng/ml) for Ang II and Ang III, and 0.5-2,000 pg (0.25-1,000 ng/ml) for Ang (1-9) and Ang (1-5). Intra-day and inter-day precisions (relative standard deviation) were <10%. Ang II, Ang III, Ang IV, and Ang (1-5) were positively correlated with ACE expression by HUVECs, while Ang I, Ang (1-7), and Ang (1-9) were negatively correlated. CONCLUSION The nanoflow liquid chromatography-parallel reaction monitoring mass spectrometry-based methodology established in this study can evaluate the Ang peptides simultaneously in HUVEC culture supernatant.
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4
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Zhao P, Zare RN, Chen H. Absolute Quantitation of Oxidizable Peptides by Coulometric Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:2398-2407. [PMID: 31429055 DOI: 10.1007/s13361-019-02299-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/15/2019] [Accepted: 07/21/2019] [Indexed: 06/10/2023]
Abstract
Quantitation methods for peptides using mass spectrometry have advanced rapidly. These methods rely on using standard and/or isotope-labeled peptides, which might be difficult or expensive to synthesize. To tackle this challenge, we present a new approach for absolute quantitation without the use of standards or calibration curves based on coulometry combined with mass spectrometry (MS). In this approach, which we call coulometric mass spectrometry (CMS), the mass spectrum of a target peptide containing one or more tyrosine residues is recorded before and after undergoing electrochemical oxidation. We record the total integrated oxidation current from the electrochemical measurement, which according to the Faraday's Law of coulometry, provides the number of moles of oxidized peptide. The ion intensity ratio of the target peptide before and after oxidation provides an excellent estimate of the fraction of the peptide that has been oxidized, from which the total amount of peptide is calculated. The striking strength of CMS is that it needs no standard peptide, but CMS does require the peptide to contain a known number of oxidizable groups. To illustrate the power of this method, we analyzed various tyrosine-containing peptides such as GGYR, DRVY, oxytocin, [Arg8]-vasotocin and angiotensinogen 1-14 with a quantification error ranging from - 7.5 to + 2.4%. This approach is also applicable to quantifying phosphopeptides and could be useful in proteomics research.
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Affiliation(s)
- Pengyi Zhao
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Richard N Zare
- Department of Chemistry, Stanford University, Stanford, CA, 94305-5080, USA.
| | - Hao Chen
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA.
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5
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Feickert M, Burckhardt BB. Substance P in cardiovascular diseases – A bioanalytical review. Clin Chim Acta 2019; 495:501-506. [DOI: 10.1016/j.cca.2019.05.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 05/12/2019] [Accepted: 05/13/2019] [Indexed: 12/13/2022]
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6
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Liquid chromatography-tandem mass spectrometry based method development and validation of S016-1271 (LR8P), a novel cationic antimicrobial peptide for its application to pharmacokinetic studies. J Pharm Biomed Anal 2019; 169:116-126. [PMID: 30851514 DOI: 10.1016/j.jpba.2019.01.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 12/31/2018] [Accepted: 01/28/2019] [Indexed: 12/13/2022]
Abstract
S016-1271 (LR8P) is a broad spectrum novel cationic antimicrobial peptide. The objective of the present study was to develop a selective liquid chromatography-tandem mass spectrometry (LC-MS/MS) based bioanalytical method of S016-1271 peptide in mice and human plasma in order to uncover its pharmacokinetic aspects. The chromatographic separation of S016-1271 (FR8P as internal standard) was achieved on a Waters™ X select CSH-C18 column (75 × 3.0 mm, 2.5 μ) using mixture of acetonitrile and triple distilled water (TDW) both containing 0.05% formic acid as mobile phase. A seven minute linear gradient method was designed to separate analytes from ion suppression at a flow rate of 0.3 mL/min. The extraction of analytes from mice and human plasma was performed through solid phase extraction technique using mixed mode weak cation exchange cartridge (Thermo SOLA WCX 10 mg 1CC) with an extraction recovery of analytes about 75%. Mass spectrometric detection of S016-1271 and FR8P was performed with optimized multiple reaction monitoring (MRM) transitions (Q1/Q3) at 658.8 [M+3H] 3+/653.2 [M+3H-NH3] 3+ and 443.4 [M+5H]5+ /434.7 [y12-NH3]4+,respectively in positive electrospray ionization (ESI) mode. The linearity in mice and human plasma was established over a concentration range of 7.81-250 ng/mL with regression coefficient (r2 > 0.99). The currently developed method was validated as per US-FDA guidelines and found to be within the acceptable limits. The method was successfully applied to intravenous (IV) pharmacokinetic study in mice wherein the levels were detected upto 24 h. The peptide demonstrated poor distribution characteristics which were demonstrated through volume of distribution at steady state (202.71 ± 47.02 mL/kg less than total body water of mice; 580 mL/kg). The clearance of the peptide predominantly occurred through central compartment (central clearance is 25 fold greater than peripheral clearance). Also, the in vitro pharmacokinetic studies demonstrated the stability of S016-1271 in plasma and high plasma protein binding in mice and humans.
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7
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Maestri E, Pavlicevic M, Montorsi M, Marmiroli N. Meta-Analysis for Correlating Structure of Bioactive Peptides in Foods of Animal Origin with Regard to Effect and Stability. Compr Rev Food Sci Food Saf 2018; 18:3-30. [PMID: 33337011 DOI: 10.1111/1541-4337.12402] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 09/28/2018] [Accepted: 09/29/2018] [Indexed: 01/09/2023]
Abstract
Amino acid (AA) sequences of 807 bioactive peptides from foods of animal origin were examined in order to correlate peptide structure with activity (antihypertensive, antioxidative, immunomodulatory, antimicrobial, hypolipidemic, antithrombotic, and opioid) and stability in vivo. Food sources, such as milk, meat, eggs, and marine products, show different frequencies of bioactive peptides exhibiting specific effects. There is a correlation of peptide structure and effect, depending on type and position of AA. Opioid peptides contain a high percentage of aromatic AA residues, while antimicrobial peptides show an excess of positively charged AAs. AA residue position is significant, with those in the first and penultimate positions having the biggest effects on peptide activity. Peptides that have activity in vivo contain a high percentage (67%) of proline residues, but the positions of proline in the sequence depend on the length of the peptide. We also discuss the influence of processing on activity of these peptides, as well as methods for predicting release from the source protein and activity of peptides.
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Affiliation(s)
- Elena Maestri
- Dept. of Chemistry, Life Sciences and Environmental Sustainability, Univ. of Parma, Parco Area delle Scienze 11/A, 43124, Parma, Italy.,Interdepartmental Centre for Food Safety, Technologies and Innovation for Agri-food (SITEIA.PARMA), Univ. of Parma, Parco Area delle Scienze, 43124, Parma, Italy
| | - Milica Pavlicevic
- Inst. for Food Technology and Biochemistry, Faculty of Agriculture, Univ. of Belgrade, Belgrade, Serbia
| | - Michela Montorsi
- Dept. of Human Sciences and Promotion of the Quality of Life, San Raffaele Roma Open Univ., Via F. Daverio 7, 20122, Milan, Italy.,Consorzio Italbiotec, Via Fantoli, 16/15, 20138, Milano, Italy.,Inst. of Bioimaging and Molecular Physiology, National Council of Research (CNR), Via Fratelli Cervi 93, 20090, Segrate, Italy
| | - Nelson Marmiroli
- Dept. of Chemistry, Life Sciences and Environmental Sustainability, Univ. of Parma, Parco Area delle Scienze 11/A, 43124, Parma, Italy.,Interdepartmental Centre for Food Safety, Technologies and Innovation for Agri-food (SITEIA.PARMA), Univ. of Parma, Parco Area delle Scienze, 43124, Parma, Italy.,Consorzio Italbiotec, Via Fantoli, 16/15, 20138, Milano, Italy
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8
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Budamgunta H, Olexiouk V, Luyten W, Schildermans K, Maes E, Boonen K, Menschaert G, Baggerman G. Comprehensive Peptide Analysis of Mouse Brain Striatum Identifies Novel sORF-Encoded Polypeptides. Proteomics 2018; 18:e1700218. [DOI: 10.1002/pmic.201700218] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/30/2018] [Indexed: 11/10/2022]
Affiliation(s)
| | - Volodimir Olexiouk
- BioBix; Lab for Bioinformatics and Computational Genomics; Department of Mathematical Modelling; Statistics and Bio-informatics; Ghent University; Ghent Belgium
| | - Walter Luyten
- Animal Physiology and Neurobiology; KULeuven; Leuven Belgium
| | | | - Evelyne Maes
- Centre for Proteomics; UAntwerp; Antwerp Belgium
- Proteins and Biomaterials; AgResearch; Christchurch New Zealand
| | - Kurt Boonen
- Centre for Proteomics; UAntwerp; Antwerp Belgium
- Unit Environmental Risk and Health; VITO; Mol Belgium
| | - Gerben Menschaert
- BioBix; Lab for Bioinformatics and Computational Genomics; Department of Mathematical Modelling; Statistics and Bio-informatics; Ghent University; Ghent Belgium
| | - Geert Baggerman
- Centre for Proteomics; UAntwerp; Antwerp Belgium
- Unit Environmental Risk and Health; VITO; Mol Belgium
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9
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Rayaprolu SJ, Hettiarachchy NS, Horax R, Kumar-Phillips G, Liyanage R, Lay J, Chen P. Purification and characterization of a peptide from soybean with cancer cell proliferation inhibition. J Food Biochem 2017. [DOI: 10.1111/jfbc.12374] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Srinivas J. Rayaprolu
- Department of Food Science; University of Arkansas; 2650 N Young Ave Fayetteville Arkansas 72704
| | - Navam S. Hettiarachchy
- Department of Food Science; University of Arkansas; 2650 N Young Ave Fayetteville Arkansas 72704
| | - Ronny Horax
- Department of Food Science; University of Arkansas; 2650 N Young Ave Fayetteville Arkansas 72704
| | - Geetha Kumar-Phillips
- Department of Poultry Science; University of Arkansas; 1260 W Maple St Fayetteville Arkansas 72701
| | - Rohana Liyanage
- Department of Chemistry and Biochemistry; University of Arkansas; 119 Chemistry Building Fayetteville Arkansas 72701
| | - Jackson Lay
- Department of Chemistry and Biochemistry; University of Arkansas; 119 Chemistry Building Fayetteville Arkansas 72701
| | - Pengyin Chen
- Department of Crop Soil and Environmental Sciences; University of Arkansas, 115 Plant Sciences Building; Fayetteville Arkansas 72701
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10
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Tang J, Li D, Drake L, Yuan W, Deschaine S, Morin EE, Ackermann R, Olsen K, Smith DE, Schwendeman A. Influence of route of administration and lipidation of apolipoprotein A-I peptide on pharmacokinetics and cholesterol mobilization. J Lipid Res 2017; 58:124-136. [PMID: 27881716 PMCID: PMC5234715 DOI: 10.1194/jlr.m071043] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 11/20/2016] [Indexed: 12/26/2022] Open
Abstract
apoA-I, apoA-I mimetic peptides, and their lipid complexes or reconstituted high-density lipoprotein (HDL) have been studied as treatments for various pathologies. However, consensus is lacking about the best method for administration, by intravenous (IV) or intraperitoneal (IP) routes, and formulation, as an HDL particle or in a lipid-free form. The objective of this study was to systematically examine peptide plasma levels, cholesterol mobilization, and lipoprotein remodeling in vivo following administration of lipid-free apoA-I peptide (22A) or phospholipid reconstituted 22A-sHDL by IV and IP routes. The mean circulation half-life was longer for 22A-sHDL (T1/2 = 6.27 h) than for free 22A (T1/2 = 3.81 h). The percentage of 22A absorbed by the vascular compartment after the IP dosing was ∼50% for both 22A and 22A-sHDL. The strongest pharmacologic response came from IV injection of 22A-sHDL, specifically a 5.3-fold transient increase in plasma-free cholesterol (FC) level compared with 1.3- and 1.8-fold FC increases for 22A-IV and 22A-sHDL-IP groups. Addition of either 22A or 22A-sHDL to rat plasma caused lipoprotein remodeling and appearance of a lipid-poor apoA-I. Hence, both the route of administration and the formulation of apoA-I peptide significantly affect its pharmacokinetics and pharmacodynamics.
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Affiliation(s)
- Jie Tang
- Department of Pharmaceutical Sciences North Campus Research Complex, University of Michigan, Ann Arbor, MI
| | - Dan Li
- Department of Pharmaceutical Sciences North Campus Research Complex, University of Michigan, Ann Arbor, MI
| | - Lindsey Drake
- Department of Medicinal Chemistry, North Campus Research Complex, University of Michigan, Ann Arbor, MI
| | - Wenmin Yuan
- Department of Pharmaceutical Sciences North Campus Research Complex, University of Michigan, Ann Arbor, MI
| | - Sara Deschaine
- Department of Pharmaceutical Sciences North Campus Research Complex, University of Michigan, Ann Arbor, MI
| | - Emily E Morin
- Department of Pharmaceutical Sciences North Campus Research Complex, University of Michigan, Ann Arbor, MI
| | - Rose Ackermann
- Department of Pharmaceutical Sciences North Campus Research Complex, University of Michigan, Ann Arbor, MI
| | - Karl Olsen
- Department of Pharmaceutical Sciences North Campus Research Complex, University of Michigan, Ann Arbor, MI
| | - David E Smith
- Department of Pharmaceutical Sciences North Campus Research Complex, University of Michigan, Ann Arbor, MI
| | - Anna Schwendeman
- Department of Pharmaceutical Sciences North Campus Research Complex, University of Michigan, Ann Arbor, MI
- Department of Medicinal Chemistry, North Campus Research Complex, University of Michigan, Ann Arbor, MI
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11
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Osborne RI, Ming W, Troutt JS, Siegel RW, Konrad RJ. A dual-monoclonal, sandwich immunoassay specific for glucagon like peptide-19–36/7 (GLP-19–36/7). Clin Biochem 2016; 49:897-902. [DOI: 10.1016/j.clinbiochem.2016.03.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 03/17/2016] [Accepted: 03/18/2016] [Indexed: 11/28/2022]
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12
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Priftis D. Polyelectrolyte-graphene Nanocomposites for Biosensing Applications. CURR ORG CHEM 2015; 19:1819-1827. [PMID: 27713667 PMCID: PMC5024728 DOI: 10.2174/1385272819666150526005557] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 03/05/2015] [Accepted: 05/25/2015] [Indexed: 11/22/2022]
Abstract
Due to their unique structure, the optical and mechanical properties graphene and its derivatives (e.g. graphene oxide, reduced graphene oxide) have captured the attention of a constantly increasing number of scientists with regards to biomolecule sensing. This mini review focuses on one specific type of sensor, that consisting of graphene and polyelectrolytes. Polyelectrolyte-graphene nanocomposites exhibit outstanding detection capabilities by synergistically combining the characteristics of both components, outperforming traditional sensors in many cases. Characteristics and mechanistic details of the most important polyelectrolyte-graphene based sensors will be discussed in detail in addition to some current challenges and future perspectives.
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Affiliation(s)
- Dimitrios Priftis
- The Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637,USA
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13
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Walczak M, Suraj J, Kus K, Kij A, Zakrzewska A, Chlopicki S. Towards a comprehensive endothelial biomarkers profiling and endothelium-guided pharmacotherapy. Pharmacol Rep 2015; 67:771-7. [DOI: 10.1016/j.pharep.2015.06.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 06/18/2015] [Accepted: 06/18/2015] [Indexed: 12/18/2022]
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14
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Gaudette F, Benito J, Steagall P, Beaudry F. Assessment of tandem mass spectrometry and high-resolution mass spectrometry for the analysis of bupivacaine in plasma. Biomed Chromatogr 2015; 29:1724-30. [PMID: 25963121 DOI: 10.1002/bmc.3485] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 03/23/2015] [Accepted: 03/31/2015] [Indexed: 11/10/2022]
Abstract
Triple quadrupole mass spectrometers coupled with high performance liquid chromatography are workhorses in quantitative bioanalyses. They provide substantial benefits including reproducibility, sensitivity and selectivity for trace analysis. Selected reaction monitoring allows targeted assay development but datasets generated contain very limited information. Data mining and analysis of nontargeted high-resolution mass spectrometry profiles of biological samples offer the opportunity to perform more exhaustive assessments, including quantitative and qualitative analysis. The objectives of this study were to test method precision and accuracy, to statistically compare bupivacaine drug concentration in real study samples and to verify if high-resolution and accurate mass data collected in scan mode can actually permit retrospective data analysis, more specifically, extract metabolite related information. The precision and accuracy data presented using both instruments provided equivalent results. Overall, the accuracy ranged from 106.2 to 113.2% and the precision observed was from 1.0 to 3.7%. Statistical comparisons using a linear regression between both methods revealed a coefficient of determination (R(2)) of 0.9996 and a slope of 1.02, demonstrating a very strong correlation between the two methods. Individual sample comparison showed differences from -4.5 to 1.6%, well within the accepted analytical error. Moreover, post-acquisition extracted ion chromatograms at m/z 233.1648 ± 5 ppm (M - 56) and m/z 305.2224 ± 5 ppm (M + 16) revealed the presence of desbutyl-bupivacaine and three distinct hydroxylated bupivacaine metabolites. Post-acquisition analysis allowed us to produce semi-quantitative evaluations of the concentration-time profiles for bupicavaine metabolites.
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Affiliation(s)
- Fleur Gaudette
- Centre de Recherche du Centre Hospitalier Universitaire de l'Université de Montréal, Montréal, Québec, Canada (CRCHUM)
| | - Javier Benito
- Département de Sciences Cliniques, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - Paulo Steagall
- Groupe de Recherche en Pharmacologie Animal du Québec, Département de Biomédecine Vétérinaire, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
| | - Francis Beaudry
- Centre de Recherche du Centre Hospitalier Universitaire de l'Université de Montréal, Montréal, Québec, Canada (CRCHUM).,Groupe de Recherche en Pharmacologie Animal du Québec, Département de Biomédecine Vétérinaire, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec, Canada
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15
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Development and validation of a liquid chromatography tandem mass spectrometry assay for the quantitation of a protein therapeutic in cynomolgus monkey serum. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 988:81-7. [DOI: 10.1016/j.jchromb.2015.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 02/06/2015] [Accepted: 02/08/2015] [Indexed: 11/22/2022]
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16
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Simultaneous determination of gonadotropin-inhibitory and gonadotropin-releasing hormones using ultra-high performance liquid chromatography electrospray ionization tandem mass spectrometry. Anal Bioanal Chem 2014; 407:497-507. [DOI: 10.1007/s00216-014-8214-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Revised: 09/19/2014] [Accepted: 09/22/2014] [Indexed: 11/27/2022]
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17
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Guerrero A, Dallas DC, Contreras S, Chee S, Parker EA, Sun X, Dimapasoc L, Barile D, German JB, Lebrilla CB. Mechanistic peptidomics: factors that dictate specificity in the formation of endogenous peptides in human milk. Mol Cell Proteomics 2014; 13:3343-51. [PMID: 25172956 DOI: 10.1074/mcp.m113.036194] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
An extensive mass spectrometry analysis of the human milk peptidome has revealed almost 700 endogenous peptides from 30 different proteins. Two in-house computational tools were created and used to visualize and interpret the data through both alignment of the peptide quasi-molecular ion intensities and estimation of the differential enzyme participation. These results reveal that the endogenous proteolytic activity in the mammary gland is remarkably specific and well conserved. Certain proteins-not necessarily the most abundant ones-are digested by the proteases present in milk, yielding endogenous peptides from selected regions. Our results strongly suggest that factors such as the presence of specific proteases, the position and concentration of cleavage sites, and, more important, the intrinsic disorder of segments of the protein drive this proteolytic specificity in the mammary gland. As a consequence of this selective hydrolysis, proteins that typically need to be cleaved at specific positions in order to exert their activity are properly digested, and bioactive peptides encoded in certain protein sequences are released. Proteins that must remain intact in order to maintain their activity in the mammary gland or in the neonatal gastrointestinal tract are unaffected by the hydrolytic environment present in milk. These results provide insight into the intrinsic structural mechanisms that facilitate the selectivity of the endogenous milk protease activity and might be useful to those studying the peptidomes of other biofluids.
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Affiliation(s)
- Andres Guerrero
- From the ‡Department of Chemistry, University of California at Davis, One Shields Avenue, Davis, California 95616;
| | - David C Dallas
- ¶Department of Food Science, University of California at Davis, One Shields Avenue, Davis, California 95616; ‖Foods for Health Institute, University of California at Davis, One Shields Avenue, Davis, California 95616
| | - Stephanie Contreras
- From the ‡Department of Chemistry, University of California at Davis, One Shields Avenue, Davis, California 95616
| | - Sabrina Chee
- From the ‡Department of Chemistry, University of California at Davis, One Shields Avenue, Davis, California 95616
| | - Evan A Parker
- From the ‡Department of Chemistry, University of California at Davis, One Shields Avenue, Davis, California 95616
| | - Xin Sun
- From the ‡Department of Chemistry, University of California at Davis, One Shields Avenue, Davis, California 95616
| | - Lauren Dimapasoc
- From the ‡Department of Chemistry, University of California at Davis, One Shields Avenue, Davis, California 95616
| | - Daniela Barile
- ¶Department of Food Science, University of California at Davis, One Shields Avenue, Davis, California 95616; ‖Foods for Health Institute, University of California at Davis, One Shields Avenue, Davis, California 95616
| | - J Bruce German
- ¶Department of Food Science, University of California at Davis, One Shields Avenue, Davis, California 95616; ‖Foods for Health Institute, University of California at Davis, One Shields Avenue, Davis, California 95616
| | - Carlito B Lebrilla
- From the ‡Department of Chemistry, University of California at Davis, One Shields Avenue, Davis, California 95616;
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Quantitation of human peptides and proteins via MS: review of analytically validated assays. Bioanalysis 2014; 6:1843-57. [DOI: 10.4155/bio.14.145] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Since the development of monoclonal antibodies in the 1970s, antibody-based assays have been used for the quantitation of proteins and peptides and, today, they are the most widely used technology in routine laboratory medicine and bioanalysis. However, in the last couple of decades, liquid chromatography-mass spectrometry/mass spectrometry (LC–MS/MS) techniques have been adopted in the quantitation of small molecules, and more recently have made significant contributions in the quantitation of proteins and peptides. In this article, we will review clinical MS-based assays for endogenous peptides, proteins, and therapeutic antibodies, for which validated methods exist. We will also cover the measurement of protein turnover and the unique solutions that MS can offer in this field.
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19
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Wang J, Kong S, Yan J, Jin G, Guo Z, Shen A, Xu J, Zhang X, Zou L, Liang X. Hydrophilic interaction liquid chromatography-solid phase extraction directly combined with protein precipitation for the determination of triptorelin in plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 960:214-21. [DOI: 10.1016/j.jchromb.2014.04.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 04/15/2014] [Accepted: 04/19/2014] [Indexed: 02/08/2023]
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20
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Wang H, Chung-Davidson YW, Li W. Identification and quantification of sea lamprey gonadotropin-releasing hormones by electrospray ionization tandem mass spectrometry. J Chromatogr A 2014; 1345:98-106. [PMID: 24768126 DOI: 10.1016/j.chroma.2014.04.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/08/2014] [Accepted: 04/08/2014] [Indexed: 10/25/2022]
Abstract
Gonadotropin-releasing hormones (GnRH) are neuropeptide hormones that regulate reproduction in vertebrates. Twenty-five unique chordate GnRH isoforms have been identified, all with very similar molecular architecture. Identification and quantification of endogenous GnRH in biological samples is extremely challenging due to the high levels of sequence similarity among these GnRH peptides and complexity of the biological matrices laden with large numbers of other peptides and protein degradation fragments, and due to low levels of GnRH abundance. In this study, three lamprey GnRH (lGnRH-I, -II, and -III) were extracted from sea lamprey brain tissue and plasma samples by solid-phase extraction (SPE) and identified by a high resolution Q-TOF mass spectrometry (MS). A rapid quantitation method was developed and validated to determine the concentrations of these three lGnRHs by using a UPLC coupled tandem MS in positive ESI multiple reaction monitoring (MRM) mode. Luteinizing hormone-release hormone (LHRH, one of the mammalian GnRHs) was used as the internal standard. The developed quantitation method was fully validated for its recovery, matrix effect, linearity, repeatability, precision and accuracy, and storage stability. This method exhibited excellent linearity in a broad concentration range for all three lGnRHs (R(2)>0.99) and limits of detection (LOD; as low as 0.007 ng/mL). Brain and plasma samples from a total of 280 sea lampreys were analyzed with the developed method to investigate the biological relevance of the lGnRH levels. The concentrations of these three lGnRHs were detected at levels of pictogram per microgram brain tissue and milliliter of plasma. The obtained analytical performance parameters and collected data from real biological samples have proven that this is a robust, sensitive, and fully validated LC-MS/MS method to simultaneously quantify three neuropeptide hormones in complex biological matrices.
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Affiliation(s)
- Huiyong Wang
- Department of Fisheries and Wildlife, Michigan State University, Room 13 Natural Resources Building, 480 Wilson Road, East Lansing, MI 48824, USA
| | - Yu-Wen Chung-Davidson
- Department of Fisheries and Wildlife, Michigan State University, Room 13 Natural Resources Building, 480 Wilson Road, East Lansing, MI 48824, USA
| | - Weiming Li
- Department of Fisheries and Wildlife, Michigan State University, Room 13 Natural Resources Building, 480 Wilson Road, East Lansing, MI 48824, USA.
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21
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Wang Y, Roth JD, Taylor SW. Simultaneous quantification of the glucagon-like peptide-1 (GLP-1) and cholecystokinin (CCK) receptor agonists in rodent plasma by on-line solid phase extraction and LC–MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 957:24-9. [DOI: 10.1016/j.jchromb.2014.02.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 02/16/2014] [Accepted: 02/23/2014] [Indexed: 11/25/2022]
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22
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Jiang H, Zeng J, Titsch C, Voronin K, Akinsanya B, Luo L, Shen H, Desai DD, Allentoff A, Aubry AF, Desilva BS, Arnold ME. Fully validated LC-MS/MS assay for the simultaneous quantitation of coadministered therapeutic antibodies in cynomolgus monkey serum. Anal Chem 2013; 85:9859-67. [PMID: 24024648 DOI: 10.1021/ac402420v] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An LC-MS/MS assay was developed and fully validated for the simultaneous quantitation of two coadministered human monoclonal antibodies (mAbs), mAb-A and mAb-B of IgG4 subclass, in monkey serum. The total serum proteins were digested with trypsin at 50 °C for 30 min after methanol denaturation and precipitation, dithiothreitol reduction, and iodoacetamide alkylation. The tryptic peptides were chromatographically separated with a C18 column (2.1 × 100 mm, 1.7 μm) with mobile phases of 0.1% formic acid in water and acetonitrile. Four peptides, a unique peptide for each mAb and two confirmatory peptides from different antibody domains, were simultaneously quantified by LC-MS/MS in the multiple reaction-monitoring mode. Stable isotopically labeled peptides with flanking amino acids on C- and N-terminals were used as internal standards to minimize the variability during sample processing and detection. The LC-MS/MS assay showed lower limit of quantitation (LLOQ) at 5 μg/mL for mAb-A and 25 μg/mL for mAb-B. The intra- and interassay precision (%CV) was within 10.0% and 8.1%, respectively, and the accuracy (%Dev) was within ±5.4% for all the peptides. Other validation parameters, including sensitivity, selectivity, dilution linearity, processing recovery and matrix effect, autosampler carryover, run size, stability, and data reproducibility, were all evaluated. The confirmatory peptides played a critical role in confirming quantitation accuracy and the integrity of the drugs in the study samples. The robustness of the LC-MS/MS assay and the data agreement with the ligand binding data demonstrated that LC-MS/MS is a reliable and complementary approach for the quantitation of coadministered antibody drugs.
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Affiliation(s)
- Hao Jiang
- Analytical and Bioanalytical Development and ‡Discovery Chemistry Synthesis, Bristol-Myers Squibb , Princeton, New Jersey, United States
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23
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Simultaneous quantification of davalintide, a novel amylin-mimetic peptide, and its active metabolite in beagle and rat plasma by online SPE and LC-MS/MS. Bioanalysis 2013; 4:2141-52. [PMID: 23013396 DOI: 10.4155/bio.12.184] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Davalintide, an investigational therapeutic peptide for the treatment of obesity, is rapidly metabolized by enzymatic cleavage of its N-terminal lysine residue to produce an active des-Lys metabolite in vivo. While a sensitive ELISA assay is available, it is unable to distinguish davalintide from its metabolite. Consequently, we developed an online SPE-LC-MS/MS method for simultaneous quantification of the drug and its active metabolite in beagle and rat plasma samples and compared the resulting pharmacokinetic profiles with those determined by ELISA. RESULTS The total concentration of active drug measured by ELISA correlated well with the total concentration of davalintide and its metabolite using online SPE-LC-MS/MS. CONCLUSION The technique is a viable alternative to immunochemistry-based methods for peptide quantitation in terms of sensitivity, reproducibility and specificity, and importantly, does not require developing antibody-based reagents.
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24
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LC–MS/MS quantification of parathyroid hormone fragment 1–34 in human plasma. Bioanalysis 2013; 5:415-22. [DOI: 10.4155/bio.12.334] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Background: It was desired to use contemporary knowledge and technology to develop a highly selective and reliable LC–MS/MS method for teriparatide in human plasma to begin to supplant existing ELISA methodologies. Results: The method was developed using SPE of intact teriparatide and the internal standard rat analogue parathyroid hormone fragment 1–34 from human plasma, and UPLC–MS/MS analysis. Inter- and intra-batch accuracy and precision ranged from 97.5 to 109%, and 1.78 to 12.4%, respectively. Mean analyte extraction recoveries of 80% were attained. Conclusion: All relevant acceptance criteria were met in a procedure akin to method validation without the stability aspects, and with a basis of excellent signal stability all performance aspects of the method were unassailable.
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25
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Xi L, Jin Y, Parker EA, Josh P, Jones A, Wijffels G, Colgrave ML. Challenges in mass spectrometry-based quantification of bioactive peptides: a case study exploring the neuropeptide Y family. Biopolymers 2013. [PMID: 23193600 DOI: 10.1002/bip.22109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The study of biologically active peptides is critical to the understanding of physiological pathways, especially those involved in the development of disease. Historically, the measurement of biologically active endogenous peptides has been undertaken by radioimmunoassay, a highly sensitive and robust technique that permits the detection of physiological concentrations in different biofluid and tissue extracts. Over recent years, a range of mass spectrometric approaches have been applied to peptide quantification with limited degrees of success. Neuropeptide Y (NPY), peptide YY (PYY), and pancreatic polypeptide (PP) belong to the NPY family exhibiting regulatory effects on appetite and feeding behavior. The physiological significance of these peptides depends on their molecular forms and in vivo concentrations systemically and at local sites within tissues. In this report, we describe an approach for quantification of individual peptides within mixtures using high-performance liquid chromatography electrospray ionization tandem mass spectrometry analysis of the NPY family peptides. Aspects of quantification including sample preparation, the use of matrix-matched calibration curves, and internal standards will be discussed. This method for the simultaneous determination of NPY, PYY, and PP was accurate and reproducible but lacks the sensitivity required for measurement of their endogenous concentration in plasma. The advantages of mass spectrometric quantification will be discussed alongside the current obstacles and challenges.
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Affiliation(s)
- Li Xi
- College of Veterinary Medicine, Northwest A&F University, Xi'an 712100, China
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26
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Rahman MS, Kabashima T, Yasmin H, Shibata T, Kai M. A novel fluorescence reaction for N-terminal Ser-containing peptides and its application to assay caspase activity. Anal Biochem 2012; 433:79-85. [PMID: 23098702 DOI: 10.1016/j.ab.2012.10.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 10/11/2012] [Accepted: 10/12/2012] [Indexed: 11/24/2022]
Abstract
Caspases are the key regulatory factors of apoptosis and are also found to be involved in inflammatory cytokinesis. Sensitive and selective determination of caspases has significant importance in evaluation of apoptosis, disease diagnosis, and drug development. Here, we developed an assay method for the determination of caspase activity. This method is based on a novel fluorescence (FL) reaction selective for N-terminal Ser-containing peptides. FL derivatization of peptides requires heating in the presence of catechol, HEPES buffer (pH 7.5), and sodium periodate. Under optimized conditions, the reaction showed a unique sequence preference for N-terminal Ser-containing peptides, and a lower detection limit (signal/noise [S/N] = 3) of approximately 0.1 μM was obtained for SKTS and SSNSF. Acetylated substrates were enzymatically cleaved to produce N-terminal Ser-containing peptides, which were selectively converted to FL compounds. The enzyme activities were simultaneously determined as low as 2 U (4.3 nM) caspase-3 and 2.5 U (3.3 nM) caspase-8 by high-performance liquid chromatography (HPLC) with FL detection. The proposed assay method does not require any labeled substrates and can be applied to evaluate cell-based apoptosis and also to study apoptosis inhibitors or inducers.
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Affiliation(s)
- Mohammed Shafikur Rahman
- Faculty of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8521, Japan
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27
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Laimou D, Katsila T, Matsoukas J, Schally A, Gkountelias K, Liapakis G, Tamvakopoulos C, Tselios T. Rationally designed cyclic analogues of luteinizing hormone-releasing hormone: enhanced enzymatic stability and biological properties. Eur J Med Chem 2012; 58:237-47. [PMID: 23127987 DOI: 10.1016/j.ejmech.2012.09.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 09/24/2012] [Accepted: 09/27/2012] [Indexed: 11/18/2022]
Abstract
This article describes the rational design, synthesis and pharmacological properties of amide-linked cyclic analogues of Luteinizing Hormone-Releasing Hormone (LHRH) with substitutions at positions 1 (Pro), 6 (D-Leu/D-Trp), 9 (Aze) and 10 (BABA/Acp). These LHRH analogues fulfil the conformational requirements that are known in the literature (bend in the 5-8 segment) to be essential for receptor recognition and activation. Although, they are characterised by an overall low binding affinity to the LHRH-I receptor, the cyclic analogues that were studied and especially the cyclo(1-10)[Pro(1), D-Leu(6), BABA(10)] LHRH, exhibit a profoundly enhanced in vitro and in vivo stability and improved pharmacokinetics in comparison with their linear counterpart and leuprolide. Upon receptor binding, cyclo(1-10)[Pro(1), D-Leu(6), BABA(10)] LHRH causes testosterone release in C57/B16 mice (in vivo efficacy) that is comparable to that of leuprolide. Testosterone release is an acutely dose dependent effect that is blocked by the LHRH-I receptor antagonist, cetrorelix. The pharmacokinetic advantages and efficacy of cyclo(1-10)[Pro(1), D-Leu(6), BABA(10)] LHRH render this analogue a promising platform for future rational drug design studies towards the development of non-peptide LHRH mimetics.
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Affiliation(s)
- Despina Laimou
- Department of Chemistry, University of Patras, GR-26500 Patras, Greece
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28
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Pailleux F, Beaudry F. Internal standard strategies for relative and absolute quantitation of peptides in biological matrices by liquid chromatography tandem mass spectrometry. Biomed Chromatogr 2012; 26:881-91. [DOI: 10.1002/bmc.2757] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Accepted: 04/23/2012] [Indexed: 01/08/2023]
Affiliation(s)
| | - Francis Beaudry
- Groupe de Recherche en Pharmacologie Animal du Québec (GREPAQ), Département de biomédecine vétérinaire, Faculté de médecine vétérinaire; Université de Montréal, Saint-Hyacinthe; Québec; Canada
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29
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Recent advances in metabolite identification and quantitative bioanalysis by LC–Q-TOF MS. Bioanalysis 2012; 4:937-59. [DOI: 10.4155/bio.12.43] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The need for rapid, sensitive and effective identification and quantitation of drugs and metabolites to accelerate drug discovery and development has given MS its central position in drug metabolism and pharmacokinetic research. This review attempts to orient the readers with respect to hybrid Q-TOF MS, which enables accurate mass measurement and generates information-rich datasets. The key properties of the Q-TOF MS system, including mass accuracy, resolution, scan speed and dynamic range, are herein discussed. Developments on tandem separation techniques (e.g., UHPLC® and ion mobility spectrometry), data acquisition and data-mining methods (e.g., mass defect, product/neutral loss, isotope pattern filters and background subtraction) that facilitate qualitative and quantitative analysis are then examined. The performance and versatility of LC–Q-TOF MS are thoroughly illustrated by its applications in metabolite identification and quantitative bioanalysis. Future perspectives are also discussed.
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30
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Christopher SJ, Kilpatrick EL, Yu LL, Davis WC, Adair BM. Preliminary evaluation of a microwave-assisted metal-labeling strategy for quantification of peptides via RPLC–ICP-MS and the method of standard additions. Talanta 2012; 88:749-58. [DOI: 10.1016/j.talanta.2011.11.064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 11/19/2011] [Accepted: 11/21/2011] [Indexed: 10/15/2022]
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31
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Katsila T, Siskos AP, Tamvakopoulos C. Peptide and protein drugs: the study of their metabolism and catabolism by mass spectrometry. MASS SPECTROMETRY REVIEWS 2012; 31:110-133. [PMID: 21698655 DOI: 10.1002/mas.20340] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Peptide and protein drugs have evolved in recent years into mainstream therapeutics, representing a significant portion of the pharmaceutical market. Peptides and proteins exhibit highly diverse structures, broad biological activities as hormones, neurotransmitters, structural proteins, metabolic modulators and therefore have a significant role as both therapeutics and biomarkers. Understanding the metabolism of synthetic or biotechnologically derived peptide and protein drugs is critical for pharmaceutical development as metabolism has a significant impact on drug efficacy and safety. Although the same principles of pharmacokinetics and metabolism of small molecule drugs apply to peptide and protein drugs, there are few notable differences. Moreover, the study of peptide and protein drug metabolism is a rather complicated process which requires sophisticated analytical techniques, and mass spectrometry based approaches have provided the capabilities for efficient and reliable quantification, characterization, and metabolite identification. This review article will focus on the current use of mass spectrometry for the study of the metabolism of peptide and protein drugs.
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Affiliation(s)
- Theodora Katsila
- Biomedical Research Foundation, Academy of Athens, Division of Pharmacology-Pharmacotechnology, Soranou Efesiou Street 4, Athens GR-11527, Greece
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Qin H, Liu J, Chen C, Wang J, Wang E. An electrochemical aptasensor for chiral peptide detection using layer-by-layer assembly of polyelectrolyte-methylene blue/polyelectrolyte-graphene multilayer. Anal Chim Acta 2011; 712:127-31. [PMID: 22177075 DOI: 10.1016/j.aca.2011.10.044] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2011] [Revised: 10/14/2011] [Accepted: 10/19/2011] [Indexed: 10/15/2022]
Abstract
Here we demonstrate for the first time that by physically adsorbing aptamer onto conductive film assembled via alternate adsorption of graphene/polyelectrolyte and methylene blue/polyelectrolyte, a label-free electrochemical aptasensor with high sensitivity and selectivity for peptide detection is constructed. Graphene multilayer derived from layer-by-layer assembly has played significant roles in this sensing strategy: allowing accumulation of methylene blue, facilitating electron transfer and providing much more adsorption site. As compared to previous electrochemical aptasensors, the current sensor based on graphene multilayer alternated with electroactive molecule layer offers extremely high capability for sensitive detection of target without interference of environmental surrounding. This electroactive probe-confined graphene multilayer confers great flexibility to combine with differential pulse voltammetry (DPV) together. In the presence of target d entiomer of arginine vasopressin (D-VP), the binding of peptide to aptamer block the electron transfer process of MB, leading to decreased current peak of DPV. By this way, this electrochemical aptasensor based on electroactive molecule-intercalated graphene multilayer provide highly sensitive and specific detection of D-VP with the lowest detectable concentration of 1 ng mL(-1) and a wide detection range from 1 to 265 ng mL(-1).
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Affiliation(s)
- Haixia Qin
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
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33
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The absolute quantification of endogenous levels of brain neuropeptides in vivo using LC-MS/MS. Bioanalysis 2011; 3:1271-85. [PMID: 21649502 DOI: 10.4155/bio.11.91] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Neuropeptides seem to play an important role when the CNS is challenged. In order to obtain better insights into the central peptidergic effects, it is essential to monitor their concentration in the brain. Quantification of neuropeptides in dialysates is challenging due to their low extracellular concentrations (low pM range), their low microdialysis efficiencies, the need for acceptable temporal resolution, the small sample volumes, the complexity of the matrix and the tendency of peptides to stick to glass and polymeric materials. The quantification of neuropeptides in dialysates therefore necessitates the use of very sensitive nano-LC-MS/MS methods. A number of LC-MS/MS and microdialysis parameters need to be optimized to achieve maximal sensitivity. The optimized and validated methods can be used to investigate the in vivo neuropeptide release during pathological conditions, in this way initiating new and immense challenges for the development of new drugs.
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Abstract
Peptides and proteins have been utilized as therapeutic agents for over 40 years. Traditional approaches to quantify these molecules in biological matrices have utilized immunoassay approaches that can be time inefficient, lack assay specificity and have limited analytical ranges. The advances in sample preparation technologies, chromatographic systems and their chemistries, mass spectrometers and their software over the last decade have meant that LC–MS/MS approaches to peptide and protein quantification are feasible and can overcome the problems associated with quantification by immunoassay. In this article we present an overview of the challenges and approaches to overcome them when performing quantitative bioanalysis of peptides and proteins by LC–MS/MS.
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Wu ST, Ouyang Z, Olah TV, Jemal M. A strategy for liquid chromatography/tandem mass spectrometry based quantitation of pegylated protein drugs in plasma using plasma protein precipitation with water-miscible organic solvents and subsequent trypsin digestion to generate surrogate peptides for detection. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2011; 25:281-290. [PMID: 21192023 DOI: 10.1002/rcm.4856] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Recently, we have developed liquid chromatography/tandem mass spectrometry (LC/MS/MS)-based methods for the quantitation of pegylated therapeutic proteins in plasma. The methods are based on the LC/MS/MS detection of a surrogate peptide generated from trypsin digestion of the therapeutic protein. Various parameters related to the bioanalytical methods were evaluated and optimized, including the preparation of calibration standards and quality control samples, sample extraction, internal standard selection and its stage of addition, trypsin digestion, and non-specific binding. In this paper, we report the development of a method for a specific pegylated therapeutic protein and detail the various optimization steps undertaken. Simple extraction of the pegylated therapeutic protein from plasma was achieved via the precipitation of the endogenous proteins in plasma using acidic isopropanol and the resulting supernatant extract was subjected to trypsin digestion. A unique tryptic peptide arising from the pegylated therapeutic protein was used for LC/MS/MS-based detection and quantitation. A protein and a peptide were used as internal standards, with the former added before the sample extraction and the latter after the sample extraction. The method developed is simple, sensitive, specific and rugged, and has been implemented in a high throughput 96-well format to analyze plasma samples from in vivo studies. A required lower limit of quantitation (LLOQ) of 10 ng/mL, expressed in terms of the concentration of the protein drug, was easily achieved.
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Affiliation(s)
- Steven T Wu
- Bristol-Myers Squibb, Research and Development, Bioanalytical and Discovery, Analytical Sciences, Route 206 & Province Line Road, Princeton, NJ 08543, USA.
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36
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A novel approach for quantitative peptides analysis by selected electron transfer reaction monitoring. J Chromatogr A 2010; 1217:6927-31. [DOI: 10.1016/j.chroma.2010.08.068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Revised: 08/07/2010] [Accepted: 08/25/2010] [Indexed: 11/20/2022]
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37
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Wang QQ, Xiang SS, Jia YB, Ou L, Chen F, Song HF, Liang Q, Ju D. An improved on-line solid phase extraction coupled HPLC–MS/MS system for quantification of Sifuvirtide in human plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:1893-8. [DOI: 10.1016/j.jchromb.2010.05.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2009] [Revised: 05/04/2010] [Accepted: 05/09/2010] [Indexed: 10/19/2022]
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38
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Comparison between a linear ion trap and a triple quadruple MS in the sensitive detection of large peptides at femtomole amounts on column. J Sep Sci 2010; 33:2478-88. [DOI: 10.1002/jssc.201000157] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Quantification of melittin and apamin in bee venom lyophilized powder from Apis mellifera by liquid chromatography-diode array detector-tandem mass spectrometry. Anal Biochem 2010; 404:171-8. [PMID: 20580685 DOI: 10.1016/j.ab.2010.05.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2010] [Revised: 05/18/2010] [Accepted: 05/19/2010] [Indexed: 11/23/2022]
Abstract
A high-performance liquid chromatography-diode array detector-tandem mass spectrometry (HPLC-DAD-MS/MS) method was developed for simultaneous determination of melittin and apamin in crude bee venom lyophilized powder (CBVLP) as the traditional Chinese medicine possessing specific biological activity. Melittin and apamin were extracted with pure water from CBVLP samples followed by HPLC-DAD-MS/MS analysis. The method was validated to demonstrate its selectivity, linearity, limit of quantification (LOQ), intraday precision, interday precision, accuracy, recovery, matrix effect, and stability. The assay was linear over the concentration ranges of 1-100 and 0.2-25 microg/ml with limit of quantifications (LOQs) of 1.0 and 0.3 microg/ml for melittin and apamin, respectively. The precision results were expressed as coefficients of variation (CVs), ranging from 2.2% to 11.4% for intraday repeatability and from 3.2% to 13.1% for interday intermediary precision. The concentrations of endogenous melittin and apamin in CBVLP samples ranged from 46% to 53% and from 2.2% to 3.7% of dry weight, respectively. This rapid, simple, precise, and sensitive method allowed the simultaneous determination of melittin and apamin to evaluate authenticity and quality of CBVLP samples.
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40
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Mass spectrometry measurement of a therapeutic peptide for use in multiple sclerosis. Gene Ther 2010; 17:709-12. [DOI: 10.1038/gt.2010.19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lortie M, Bark S, Blantz R, Hook V. Detecting low-abundance vasoactive peptides in plasma: progress toward absolute quantitation using nano liquid chromatography-mass spectrometry. Anal Biochem 2009; 394:164-70. [PMID: 19615967 PMCID: PMC2745394 DOI: 10.1016/j.ab.2009.07.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2009] [Revised: 07/10/2009] [Accepted: 07/14/2009] [Indexed: 11/19/2022]
Abstract
Profiling changes in the concentration of functionally related peptide hormones is critical to understanding the etiology of many diseases and therapies. We present novel data using nano liquid chromatography-mass spectrometry (LC-MS) to simultaneously measure a select group of vasoactive peptides (angiotensin, bradykinin, and related hormones) in 50-microl plasma samples, enabling repeated sampling in rodent models. By chromatographically resolving target peptides and using multiple reaction monitoring to enhance MS sensitivity, linear responses down to 10(-17) mol were achieved. Purification of plasma peptides by either methanol precipitation or off-line high-performance liquid chromatography (HPLC) fractionation enabled the detection of endogenous peptides and revealed approaches for enhancing recovery. As proof of principle, seven vasoactive peptides were profiled before, during, and after acute angiotensin-converting enzyme (ACE) inhibition in an anesthetized rat. Of note was an apparent 10-fold increase in vasodilatory bradykinin that reversed after drug infusion but relatively minor changes in angiotensin II levels. Targeted MS analysis used to profile functionally related peptides or other analytes will greatly enhance our ability to define the sequence of events regulating complex and dynamic physiological processes.
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Affiliation(s)
- Mark Lortie
- Division of Nephrology and Hypertension, VA San Diego Healthcare System, Biomarker and Diagnotics Discovery Center, Department of Pathology, UCSD School of Medicine, San Diego, CA 92093-0612, USA.
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42
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Quantification of thyrotropin-releasing hormone by liquid chromatography–electrospray mass spectrometry. Amino Acids 2009; 38:1031-41. [DOI: 10.1007/s00726-009-0311-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Accepted: 05/27/2009] [Indexed: 12/20/2022]
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43
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Siskos AP, Katsila T, Balafas E, Kostomitsopoulos N, Tamvakopoulos C. Simultaneous Absolute Quantification of the Glucose-Dependent Insulinotropic Polypeptides GIP1−42 and GIP3−42 in Mouse Plasma by LC/ESI-MS/MS: Preclinical Evaluation of DP-IV Inhibitors. J Proteome Res 2009; 8:3487-96. [DOI: 10.1021/pr900155h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Alexandros P. Siskos
- Division of Pharmacology-Pharmacotechnology and Centre of Experimental Surgery, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Street, Athens 11527, Greece
| | - Theodora Katsila
- Division of Pharmacology-Pharmacotechnology and Centre of Experimental Surgery, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Street, Athens 11527, Greece
| | - Evangelos Balafas
- Division of Pharmacology-Pharmacotechnology and Centre of Experimental Surgery, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Street, Athens 11527, Greece
| | - Nikolaos Kostomitsopoulos
- Division of Pharmacology-Pharmacotechnology and Centre of Experimental Surgery, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Street, Athens 11527, Greece
| | - Constantin Tamvakopoulos
- Division of Pharmacology-Pharmacotechnology and Centre of Experimental Surgery, Biomedical Research Foundation of the Academy of Athens, 4 Soranou Efesiou Street, Athens 11527, Greece
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44
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Kosanam H, Ramagiri S, Dass C. Quantification of endogenous alpha- and gamma-endorphins in rat brain by liquid chromatography-tandem mass spectrometry. Anal Biochem 2009; 392:83-9. [PMID: 19486879 DOI: 10.1016/j.ab.2009.05.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Accepted: 05/26/2009] [Indexed: 10/20/2022]
Abstract
Quantification of alpha- and gamma-endorphins in rat brain using liquid chromatography-electrospray ionization-tandem mass spectrometry is described. [D-Ala(2)]-gamma-endorphin is used as an internal standard. The precursor-to-product ion MRM transitions for alpha-endorphin, gamma-endorphin, and [D-Ala(2)]-gamma-endorphin were m/z 873.6-->429.6; 929.6-->542.3; 936.6-->542.3, respectively. The method was validated in terms of linearity, specificity, sensitivity, recovery, precision, and accuracy. The assay was linear over a concentration range of 0.1-200 ng/mL with the limit-of-detection of 0.03 ng/mL and limit-of-quantification of 0.1 ng/mL. The endogenous concentrations of alpha- and gamma-endorphins in rat brains were 13.8+/-0.57 (mean+/-SD; n=5) and 2.5+/-0.43 ng/g of wet tissue weight, respectively.
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Affiliation(s)
- Hari Kosanam
- Department of Chemistry, The University of Memphis, Campus Box 526060, Memphis, TN 38152, USA
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45
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Callipo L, Foglia P, Gubbiotti R, Samperi R, Laganà A. HPLC-CHIP coupled to a triple quadrupole mass spectrometer for carbonic anhydrase II quantification in human serum. Anal Bioanal Chem 2009; 394:811-20. [PMID: 19306113 DOI: 10.1007/s00216-009-2752-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2008] [Revised: 02/23/2009] [Accepted: 03/11/2009] [Indexed: 12/31/2022]
Abstract
A method for carbonic anhydrase II (CA II) absolute quantification in human serum is presented. This method is based on high-performance liquid chromatography (HPLC)-Chip microfluidic device incorporating a nanoelectrospray source interfaced to a triple quadrupole mass spectrometer. The fraction containing CA II was isolated by preparative reversed-phase HPLC, and peptides obtained from the tryptic digest of the protein mixture were separated by the HPLC-Chip system. The multiple-reaction monitoring acquisition mode of a selected suitable CA II peptide and peptide internal standard allowed the selective and sensitive determination of a CA II. Absolute recovery of the method was 52 +/- 12%, while analytical recovery was 81 +/- 10%. For the eight samples analyzed, the matrix effect was found to be only -14 +/- 6%. A comparison among three regression lines type which were obtained by external calibration, matrix-matched calibration, and standard addition method, respectively, demonstrated that the first one is adequate in obtaining good accuracy and precision. Method quantification limit for CA II in serum was estimated to be 2 fmol/mL. CA II mean concentration in sera from eight healthy subjects was found to be 56 pmol/mL (relative standard deviation 24%).
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Affiliation(s)
- Luciano Callipo
- Department of Chemistry, Sapienza University of Rome, Box n masculine 34, Roma 62, Piazzale Aldo Moro 5, 00185, Rome, Italy
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46
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Sofianos ZD, Katsila T, Kostomitsopoulos N, Balafas V, Matsoukas J, Tselios T, Tamvakopoulos C. In vivo evaluation and in vitro metabolism of leuprolide in mice--mass spectrometry-based biomarker measurement for efficacy and toxicity. JOURNAL OF MASS SPECTROMETRY : JMS 2008; 43:1381-1392. [PMID: 18438975 DOI: 10.1002/jms.1416] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The study of pharmacologically active peptides is central for the understanding of cancer and the development of novel therapeutic approaches. In this context, both qualitative and quantitative determination of bioactive peptides in biological fluids/tissues and their effect on endogenous factors (e.g. hormones) are of great importance. A mass spectrometry-based approach was developed and applied towards the measurement of leuprolide, a peptide drug for the treatment of prostate cancer, in mouse plasma. High-pressure liquid chromatography coupled to a hybrid quadrupole linear ion trap (QqLIT) mass spectrometer, a platform that combines the benefits of triple QqLIT instruments, was employed for the study. Using the described methodology, we established that picomolar concentrations of leuprolide could be measured in mouse plasma (limit of quantification of 0.1 ng/ml). In order to optimize pharmacokinetic properties of analogs of leuprolide, a facile in vivo mouse model was developed and leuprolide concentrations were determined in mouse plasma following intraperitoneal administration. In the same animal model, we demonstrated the versatility of the described MS-based approach by the determination of plasma concentrations of testosterone, an established biomarker for the treatment of prostate cancer. Following dosing with leuprolide, circulating testosterone was increased significantly in comparison to vehicle-treated mice. Finally, in vitro metabolism of leuprolide was evaluated by incubation of leuprolide with mouse kidney membranes, followed by identification of major metabolites by MS. Such studies provide the framework for future evaluation of novel leuprolide analogs with potential therapeutic advantages.
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Affiliation(s)
- Zacharias D Sofianos
- Division of Pharmacology-Pharmacotechnology, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
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47
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Schlüter H, Hildebrand D, Gallin C, Schulz A, Thiemann J, Trusch M. Mass spectrometry for monitoring protease reactions. Anal Bioanal Chem 2008; 392:783-92. [PMID: 18584157 PMCID: PMC7080141 DOI: 10.1007/s00216-008-2213-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Revised: 05/27/2008] [Accepted: 05/28/2008] [Indexed: 12/02/2022]
Abstract
More than 560 genes are annotated as proteases in the human genome. About half of the genes are not or are only marginally characterized. Over the past decade, mass spectrometry has become the basis for proteomics, especially for protein identification, performed in a high-throughput manner. This development was also very fruitful for exploring the complex systems associated with protease functions, as briefly reviewed here. Mass spectrometry is an ideal tool for monitoring protease reactions, as will be highlighted in this review.
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Affiliation(s)
- H Schlüter
- Charite-Core Facility Protein Analysis, Tucholskystr. 2, 10117, Berlin, Germany.
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48
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Garbis SD, Tyritzis SI, Roumeliotis T, Zerefos P, Giannopoulou EG, Vlahou A, Kossida S, Diaz J, Vourekas S, Tamvakopoulos C, Pavlakis K, Sanoudou D, Constantinides CA. Search for Potential Markers for Prostate Cancer Diagnosis, Prognosis and Treatment in Clinical Tissue Specimens Using Amine-Specific Isobaric Tagging (iTRAQ) with Two-Dimensional Liquid Chromatography and Tandem Mass Spectrometry. J Proteome Res 2008; 7:3146-58. [DOI: 10.1021/pr800060r] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Spiros D. Garbis
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Stavros I. Tyritzis
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Theodoros Roumeliotis
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Panagiotis Zerefos
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Eugenia G. Giannopoulou
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Antonia Vlahou
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Sophia Kossida
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Jose Diaz
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Stavros Vourekas
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Constantin Tamvakopoulos
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Kitty Pavlakis
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Despina Sanoudou
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
| | - Constantinos A. Constantinides
- Biomedical Research Foundation, Academy of Athens, Greece, Department of Urology, Athens University Medical School, “LAIKO” Hospital, Athens, Greece, Department of Computer Science and Technology, University of Peloponnese, Tripoli, Greece, Department of Pathology, Institute for Drug Development, San Antonio, Texas, and Department of Pathology, Athens University Medical School, Greece
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49
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Saz JM, Marina ML. Application of micro- and nano-HPLC to the determination and characterization of bioactive and biomarker peptides. J Sep Sci 2008; 31:446-58. [PMID: 18266259 DOI: 10.1002/jssc.200700589] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This article reviews the works published since 2001 (included) on the micro/nano-HPLC analysis of bioactive and biomarker peptides. The main achievements related to the improvement of the detection sensitivity, quantitation repeatability and reproducibility, and separation selectivity are highlighted. A wide attention is paid to the application of micro/nano-HPLC to the analysis of bioactive peptides in biological matrices. The uses of micro/nano-HPLC in peptidomics to discover new endogenous bioactive peptides and to develop quantitation procedures to compare the levels of peptides of interest in two different biological samples are also considered. Finally, the application of micro/nano-HPLC to the analysis of biomarker peptides for various diseases is also included in this review.
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Affiliation(s)
- José María Saz
- Department of Analytical Chemistry, Faculty of Chemistry, University of Alcalá, Alcalá de Henares, Madrid, Spain
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50
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Cavaliere C, Cucci F, Guarino C, Gubbiotti R, Samperi R, Laganà A. Absolute quantification of cardiac troponin T by means of liquid chromatography/triple quadrupole tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2008; 22:1159-1167. [PMID: 18338372 DOI: 10.1002/rcm.3495] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A liquid chromatography/tandem mass spectrometric method for absolute quantification of cardiac troponin T (cTnT) in mouse heart tissue is presented. Even in such a complex biological sample, the multiple reaction monitoring acquisition mode allowed the selective and sensitive determination of a specific peptide, obtained by cTnT enzymatic digestion. The concentration of this cTnT-specific peptide was considered as a representation of the concentration of its parent protein. Quantification was carried out by means of the matrix-matched calibration curve, constructed by adding the synthetic standard of the target peptide and another synthetic structurally analogous peptide as internal standard. Method identification limit and method quantification limit were estimated as 60 and 110 ng of cTnT per mg of total extracted proteins, respectively. The developed label-free approach has been applied for the absolute quantitation of cTnT because of its diagnostic and prognostic value as cardiac disease marker. However, the method could be of general application, since it requires only the synthesis of two suitable peptides, a protein tryptic cleavage product and an internal standard.
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Affiliation(s)
- Chiara Cavaliere
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, Rome, Italy
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