1
|
Vanarsa K, Henderson J, Soomro S, Qin L, Zhang T, Jordan N, Putterman C, Blanco I, Saxena R, Mohan C. Upregulation of Proinflammatory Bradykinin Peptides in Systemic Lupus Erythematosus and Rheumatoid Arthritis. THE JOURNAL OF IMMUNOLOGY 2020; 205:369-376. [PMID: 32540998 DOI: 10.4049/jimmunol.1801167] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 05/18/2020] [Indexed: 01/01/2023]
Abstract
Our recent study has implicated bradykinin (BK) signaling as being of pathogenic importance in lupus. This study aims to investigate the biomarker potential of BK peptides, BK and BK-des-arg-9, in lupus and other rheumatic autoimmune diseases. Sera from systemic lupus erythematosus (SLE) patients and healthy subjects were screened for BK and BK-des-arg-9 by liquid chromatography-mass spectrometry metabolomics. Serum from 6-mo-old C57BL/6 mice and three murine lupus strains were also screened for the two peptides by metabolomics. Given the promising initial screening results, validation of these two peptides was next conducted using multiple reaction monitoring in larger patient cohorts. In initial metabolomics screening, BK-des-arg-9 was 22-fold higher in SLE serum and 106-fold higher in mouse lupus serum compared with healthy controls. In validation assays using multiple reaction monitoring and quadrupole time-of-flight mass spectrometry, BK and BK-des-arg-9 showed significant elevations in SLE serum compared with controls (p < 0.0001; area under the curve = 0.79-0.88), with a similar but less pronounced increase being noted in rheumatoid arthritis serum. Interestingly, increased renal SLE disease activity index in lupus patients was associated with reduced circulating BK-des-arg-9, and the reasons for this remain to be explored. To sum, increased conversion of BK to the proinflammatory metabolite BK-des-arg-9 appears to be a common theme in systemic rheumatic diseases. Besides serving as an early marker for systemic autoimmunity, independent studies also show that this metabolic axis may also be a pathogenic driver and therapeutic target in lupus.
Collapse
Affiliation(s)
- Kamala Vanarsa
- Biomedical Engineering, University of Houston, Houston, TX 77204
| | - Jared Henderson
- Biomedical Engineering, University of Houston, Houston, TX 77204
| | - Sanam Soomro
- Biomedical Engineering, University of Houston, Houston, TX 77204
| | - Ling Qin
- Tongji University School of Medicine, Shanghai Tenth People's Hospital, Shanghai 200072, People's Republic of China
| | - Ting Zhang
- Biomedical Engineering, University of Houston, Houston, TX 77204
| | - Nicole Jordan
- Division of Rheumatology, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Chaim Putterman
- Division of Rheumatology, Albert Einstein College of Medicine, Bronx, NY 10461.,Azrieli Faculty of Medicine, Bar-Ilan University, Zefat, Israel 52000.,Research Institute, Galilee Medical Center, Nahariya, Israel 22100; and
| | - Irene Blanco
- Division of Rheumatology, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Ramesh Saxena
- Nephrology Clinical and Translational Research, University of Texas Southwestern Medical Center, Dallas, TX 75390
| | - Chandra Mohan
- Biomedical Engineering, University of Houston, Houston, TX 77204;
| |
Collapse
|
2
|
Ouyang F, Yu T, Gu C, Wang G, Shi R, Lv R, Wu E, Ma C, Guo R, Li J, Zaczek A, Liu J. Sensitive detection of caspase-3 enzymatic activities and inhibitor screening by mass spectrometry with dual maleimide labelling quantitation. Analyst 2019; 144:6751-6759. [DOI: 10.1039/c9an01458f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
There is a great need to develop sensitive and specific methods for quantitative analysis of caspase-3 activities in cell apoptosis.
Collapse
|
3
|
Schmitz EM, Leijten NM, van Dongen JL, Broeren MA, Milroy LG, Brunsveld L, Scharnhorst V, van de Kerkhof D. Optimizing charge state distribution is a prerequisite for accurate protein biomarker quantification with LC-MS/MS, as illustrated by hepcidin measurement. ACTA ACUST UNITED AC 2018; 56:1490-1497. [DOI: 10.1515/cclm-2018-0013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 03/26/2018] [Indexed: 12/20/2022]
Abstract
Abstract
Background:
Targeted quantification of protein biomarkers with liquid chromatography-tandem mass spectrometry (LC-MS/MS) has great potential, but is still in its infancy. Therefore, we elucidated the influence of charge state distribution and matrix effects on accurate quantification, illustrated by the peptide hormone hepcidin.
Methods:
An LC-MS/MS assay for hepcidin, developed based on existing literature, was improved by using 5 mM ammonium formate buffer as mobile phase A and as an elution solution for solid phase extraction (SPE) to optimize the charge state distribution. After extensive analytical validation, focusing on interference and matrix effects, the clinical consequence of this method adjustment was studied by performing receiving operating characteristic (ROC)-curve analysis in patients with iron deficiency anemia (IDA, n=44), anemia of chronic disease (ACD, n=42) and non-anemic patients (n=93).
Results:
By using a buffered solution during sample preparation and chromatography, the most abundant charge state was shifted from 4+ to 3+ and the charge state distribution was strongly stabilized. The matrix effects which occurred in the 4+ state were therefore avoided, eliminating bias in the low concentration range of hepcidin. Consequently, sensitivity, specificity and positive predictive value (PPV) for detection of IDA patients with the optimized assay (96%, 97%, 91%, respectively) were much better than for the original assay (73%, 70%, 44%, respectively).
Conclusions:
Fundamental improvements in LC-MS/MS assays greatly impact the accuracy of protein quantification. This is urgently required for improved diagnostic accuracy and clinical value, as illustrated by the validation of our hepcidin assay.
Collapse
Affiliation(s)
- Ellen M.H. Schmitz
- Expert Center Clinical Chemistry Eindhoven , Eindhoven , The Netherlands
- Catharina Hospital Eindhoven , Clinical Laboratory , Eindhoven , The Netherlands
- Eindhoven University of Technology , Department of Biomedical Engineering , Laboratory of Chemical Biology and Institute for Complex Molecular Systems , Eindhoven , The Netherlands
- Máxima Medical Center Veldhoven , Clinical Laboratory , Veldhoven , The Netherlands
| | - Niels M. Leijten
- Expert Center Clinical Chemistry Eindhoven , Eindhoven , The Netherlands
- Catharina Hospital Eindhoven , Clinical Laboratory , Eindhoven , The Netherlands
- Eindhoven University of Technology , Department of Biomedical Engineering , Laboratory of Chemical Biology and Institute for Complex Molecular Systems , Eindhoven , The Netherlands
| | - Joost L.J. van Dongen
- Expert Center Clinical Chemistry Eindhoven , Eindhoven , The Netherlands
- Eindhoven University of Technology , Department of Biomedical Engineering , Laboratory of Chemical Biology and Institute for Complex Molecular Systems , Eindhoven , The Netherlands
| | - Maarten A.C. Broeren
- Expert Center Clinical Chemistry Eindhoven , Eindhoven , The Netherlands
- Máxima Medical Center Veldhoven , Clinical Laboratory , Veldhoven , The Netherlands
| | - Lech G. Milroy
- Eindhoven University of Technology , Department of Biomedical Engineering , Laboratory of Chemical Biology and Institute for Complex Molecular Systems , Eindhoven , The Netherlands
| | - Luc Brunsveld
- Expert Center Clinical Chemistry Eindhoven , Eindhoven , The Netherlands
- Eindhoven University of Technology , Department of Biomedical Engineering , Laboratory of Chemical Biology and Institute for Complex Molecular Systems , Eindhoven , The Netherlands
| | - Volkher Scharnhorst
- Expert Center Clinical Chemistry Eindhoven , Eindhoven , The Netherlands
- Catharina Hospital Eindhoven , Clinical Laboratory , Eindhoven , The Netherlands
- Eindhoven University of Technology , Department of Biomedical Engineering , Laboratory of Chemical Biology and Institute for Complex Molecular Systems , Eindhoven , The Netherlands
| | - Daan van de Kerkhof
- Expert Center Clinical Chemistry Eindhoven , Eindhoven , The Netherlands
- Catharina Hospital Eindhoven , Clinical Laboratory , Eindhoven , The Netherlands
- Algemeen Klinisch Laboratorium Catharina Ziekenhuis , Michelangelolaan 2 , 5623 EJ Eindhoven , The Netherlands
| |
Collapse
|
4
|
Gummer J, Trengove R, Pascoe EM, Badve SV, Cass A, Clarke P, McDonald SP, Morrish AT, Pedagogos E, Perkovic V, Reidlinger D, Scaria A, Walker R, Vergara LA, Hawley CM, Johnson DW, Olynyk JK, Ferrari P. Association between serum hepcidin-25 and primary resistance to erythropoiesis-stimulating agents in chronic kidney disease: a secondary analysis of the HERO trial. Nephrology (Carlton) 2018; 22:548-554. [PMID: 27171136 DOI: 10.1111/nep.12815] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Revised: 05/02/2016] [Accepted: 05/07/2016] [Indexed: 01/10/2023]
Abstract
BACKGROUND Pentoxifylline has been shown to increase haemoglobin levels in patients with chronic kidney disease (CKD) and erythropoietin-stimulating agent (ESA)-hyporesponsive anaemia in the Handling Erythropoietin Resistance with Oxpentifylline multicentre double-blind, randomized controlled trial. The present sub-study evaluated the effects of pentoxifylline on the iron-regulatory hormone hepcidin in patients with ESA-hyporesponsive CKD. METHODS This sub-study included 13 patients in the pentoxifylline arm (400 mg daily) and 13 in the matched placebo arm. Hepcidin-25 was measured by ultra performance liquid chromatography/quadrupole time-of-flight mass spectrometry following isolation from patient serum. Serum hepcidin-25, serum iron biomarkers, haemoglobin and ESA dosage were compared within and between the two groups. RESULTS Hepcidin-25 concentration at 4 months adjusted for baseline did not differ significantly in pentoxifylline versus placebo treated patients (adjusted mean difference (MD) -7.9 nmol, P = 0.114), although the difference between the groups mean translated into a >25% reduction of circulating hepcidin-25 due to pentoxifylline compared with the placebo baseline. In paired analysis, serum hepcidin-25 levels were significantly decreased at 4 months compared with baseline in the pentoxifylline group (-5.47 ± 2.27 nmol/l, P < 0.05) but not in the placebo group (2.82 ± 4.29 nmol/l, P = 0.24). Pentoxifylline did not significantly alter serum ferritin (MD 55.4 mcg/l), transferrin saturation (MD 4.04%), the dosage of ESA (MD -9.93 U/kg per week) or haemoglobin concentration (MD 5.75 g/l). CONCLUSION The reduction of circulating hepcidin-25 due to pentoxifylline did not reach statistical significance; however, the magnitude of the difference suggests that pentoxifylline may be a clinically and biologically meaningful modulator of hepcidin-25 in dialysis of patients with ESA-hyporesponsive anaemia.
Collapse
Affiliation(s)
- Joel Gummer
- Separation Science and Metabolomics Laboratory and Metabolomics Australia, Murdoch University Node, Perth, Australia
| | - Robert Trengove
- Separation Science and Metabolomics Laboratory and Metabolomics Australia, Murdoch University Node, Perth, Australia
| | - Elaine M Pascoe
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia
| | - Sunil V Badve
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia.,Department of Nephrology, St George Hospital, Sydney, Australia
| | - Alan Cass
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia.,Menzies School of Health Research, Darwin, Australia
| | - Philip Clarke
- Centre for Health Policy, Programs and Economics, University of Melbourne, Melbourne, Australia
| | - Stephen P McDonald
- Department of Nephrology and Transplantation Services, University of Adelaide at Central Northern Adelaide Renal and Transplantation Services, Adelaide, Australia
| | - Alicia T Morrish
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia
| | - Eugenie Pedagogos
- Department of Nephrology, Royal Melbourne Hospital, Melbourne, Australia
| | - Vlado Perkovic
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia.,The George Institute for Global Health, Sydney, Australia
| | - Donna Reidlinger
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia
| | - Anish Scaria
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia
| | - Rowan Walker
- Department of Renal Medicine, The Alfred Hospital, Melbourne, Australia
| | - Liza A Vergara
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia
| | - Carmel M Hawley
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia.,Department of Nephrology, Princess Alexandra Hospital, Brisbane, Australia
| | - David W Johnson
- Australasian Kidney Trials Network, University of Queensland, Brisbane, Australia.,Department of Nephrology, Princess Alexandra Hospital, Brisbane, Australia
| | - John K Olynyk
- Department of Gastroenterology, Fremantle and Fiona Stanley Hospitals, Perth, Australia.,School of Veterinary Sciences, Murdoch University, Perth, Australia.,School of Biomedical Sciences and Curtin Health Innovation Research Institute, Curtin University, Perth, Australia
| | - Paolo Ferrari
- Department of Nephrology, Prince of Wales Hospital, Sydney, Australia.,Clinical School, University of New South Wales, Sydney, Australia
| | | |
Collapse
|
5
|
Ouyang F, Zhao Z, Gao R, Shi R, Wu E, Lv R, Xu G, Liu J. Dual Maleimide Tagging for Relative and Absolute Quantitation of Cysteine-Containing Peptides by MALDI-TOF MS. Chembiochem 2018; 19:1154-1161. [PMID: 29542852 DOI: 10.1002/cbic.201800031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Indexed: 12/18/2022]
Abstract
A dual maleimide (DuMal) tagging method has been developed for both relative and absolute quantitation of cysteine-containing peptides (CCPs) in combination with MALDI-TOF mass spectrometry. A pair of maleimides with minimal differences in their chemical structures, N-methylmaleimide and Nethylmaleimide, have been chosen to allow for the rapid (≈minutes) tagging of CCPs in the Michael addition reaction with high efficiency. It has been validated that the DuMal tagging technique is sensitive and reliable in the quantitative analysis of CCPs. Absolute quantitation of CCPs can be achieved with a detection limit as low as 7.3 nm. Relative quantitation of CCPs can be performed in various sample mixtures with consistent results (coefficient of variation <5 %). The DuMal tagging technique provides a sensitive and accurate approach for the quantitation of biomolecules containing thiol reactive sites; thus it is promising for protein detection, disease diagnosis, and biomarker discovery associated with post-translational modifications of cysteines.
Collapse
Affiliation(s)
- Fuzhong Ouyang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu Province, 215123, P.R. China
| | - Zhihao Zhao
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu Province, 215123, P.R. China
| | - Ruifang Gao
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu Province, 215123, P.R. China
| | - Rui Shi
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu Province, 215123, P.R. China
| | - Enhui Wu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu Province, 215123, P.R. China
| | - Rui Lv
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu Province, 215123, P.R. China
| | - Guoqiang Xu
- Jiangsu Key Laboratory of Translational Research, and Therapy for Neuro-Psycho-Diseases, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu Province, 215123, P.R. China
| | - Jian Liu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu Province, 215123, P.R. China
| |
Collapse
|
6
|
Klont F, Ten Hacken NHT, Horvatovich P, Bakker SJL, Bischoff R. Assuring Consistent Performance of an Insulin-Like Growth Factor 1 MALDImmunoassay by Monitoring Measurement Quality Indicators. Anal Chem 2017; 89:6188-6195. [PMID: 28467045 PMCID: PMC5463271 DOI: 10.1021/acs.analchem.7b01125] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Analytical
methods based on mass spectrometry (MS) have been successfully
applied in biomarker discovery studies, while the role of MS in translating
biomarker candidates to clinical diagnostics is less pronounced. MALDImmunoassays—methods
that combine immunoaffinity enrichment with matrix-assisted laser
desorption ionization time-of-flight (MALDI-TOF) mass spectrometric
detection—are attractive analytical approaches for large-scale
sample analysis by virtue of their ease of operation and high-throughput
capabilities. Despite this fact, MALDImmunoassays are not widely used
in clinical diagnostics, which is mainly due to the limited availability
of internal standards that can adequately correct for variability
in sample preparation and the MALDI process itself. Here we present
a novel MALDImmunoassay for quantification of insulin-like growth
factor 1 (IGF1) in human plasma. Reliable IGF1 quantification in the
range of 10–1000 ng/mL was achieved by employing 15N-IGF1 as internal standard, which proved to be an essential feature
of the IGF1 MALDImmunoassay. The method was validated according to
U.S. Food and Drug Administration (FDA) guidelines, which included
demonstrating the effectiveness of IGF1/IGF binding protein (IGF1/IGFBP)
complex dissociation using sodium dodecyl sulfate (SDS). Furthermore,
the MALDImmunoassay compared well with the IDS-iSYS IGF1 immunoassay
with high correlation (R2 = 0.99), although
substantially lower levels were reported by the MALDImmunoassay. The
method was tested on >1000 samples from a cohort of renal transplant
recipients to assess its performance in a clinical setting. On the
basis of this study, we identified readouts to monitor the quality
of the measurements. Our work shows that MALDI-TOF mass spectrometry
is suitable for quantitative biomarker analysis provided that an appropriate
internal standard is used and that readouts are monitored to assess
the quality of the measurements.
Collapse
Affiliation(s)
- Frank Klont
- Analytical Biochemistry, Department of Pharmacy, University of Groningen , Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | | | - Péter Horvatovich
- Analytical Biochemistry, Department of Pharmacy, University of Groningen , Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | | | - Rainer Bischoff
- Analytical Biochemistry, Department of Pharmacy, University of Groningen , Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
| |
Collapse
|
7
|
Lefebvre T, Dessendier N, Houamel D, Ialy-Radio N, Kannengiesser C, Manceau H, Beaumont C, Nicolas G, Gouya L, Puy H, Karim Z. LC-MS/MS method for hepcidin-25 measurement in human and mouse serum: clinical and research implications in iron disorders. Clin Chem Lab Med 2016; 53:1557-67. [PMID: 25781546 DOI: 10.1515/cclm-2014-1093] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 01/22/2015] [Indexed: 12/16/2022]
Abstract
BACKGROUND The peptide hepcidin plays a central role in regulating dietary iron absorption and body iron distribution. This 25-amino acid hormone is produced and secreted predominantly by hepatocytes. Hepcidin has been suggested as a promising diagnostic marker for iron-related disorders. However, its accurate quantification for clinical use remains so far challenging. In this report we describe a highly specific and quantitative serum hepcidin method using liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS). MATERIAL The analytical validation included the determination of the limit of detection, of quantification, repeatability, reproducibility and linearity. This assay was developed for human and mouse hepcidin. The human assay was performed on serum patients with unexplained microcytic anemia. We applied our LC-MS/MS method for quantifying hepcidin-1 in mouse in various conditions: inflammation, hemolytic anemia, Hamp-1, Hjv and Hfe KO mice. RESULTS We show that the LC-MS/MS is suitable for accurate determination of hepcidin-25 in clinical samples, thereby representing a useful tool for the clinical diagnosis and follow-up of iron-related diseases. In mouse, a strong correlation between hepatic Hamp-1 mRNA expression and serum hepcidin-1 levels was found (r=0.88; p=0.0002) and the expected variations in mouse models of iron disorders were observed. CONCLUSIONS Therefore, we propose this adaptive LC-MS/MS method as a suitable method for accurate determination of hepcidin-25 in clinical samples and as a major tool contributing to the clinical diagnosis, follow-up and management of iron-related disorders. It also opens new avenues to measure hepcidin in animal models without interspecies antigenic limitations.
Collapse
|
8
|
Konz T, Montes-Bayón M, Vaulont S. Hepcidin quantification: methods and utility in diagnosis. Metallomics 2015; 6:1583-90. [PMID: 24874645 DOI: 10.1039/c4mt00063c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Hepcidin is a 25-amino acid peptide hormone that is produced and secreted predominantly by hepatocytes, circulates in the bloodstream, and is excreted by the kidneys. Since the discovery of hepcidin and the elucidation of its important role in iron homeostasis, hepcidin has been suggested as a promising diagnostic marker for iron-related disorders. In this regard, a number of analytical methods have been developed in order to assess hepcidin concentration in different biological fluids, particularly serum and urine. In this critical review we have tried to address the issues still pending in accurate determination of this peptide by evaluating the available analytical methodologies. Among them, the use of ELISA strategies (in competitive or sandwich formats) and molecular mass spectrometry (MS) including MALDI and/or LC-MS has been critically compared. The use of elemental mass spectrometry (ICP-MS) has also been included as a possible complementary tool to the previous ones. In addition, this manuscript has revised the existing and potentially emerging clinical applications of hepcidin testing for diagnosis. These include the iron disorders such as iron deficiency anemia (IDA, low hepcidin), anemia of chronic disease (ACD, high hepcidin) and the combined state of ACD and IDA or hemochromatosis. Other applications such as using hepcidin in assessing the response to existing therapies in cancer have also been revised in the manuscript.
Collapse
Affiliation(s)
- T Konz
- Department of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, C/Julian Clavería 8, 33006 Oviedo, Spain.
| | | | | |
Collapse
|
9
|
Wang J, Liu G, Xu Z, Dai J, Song P, Shi J, Hu Y, Hu Z, Nie G, Chang YZ, Zhao Y. Hepcidin levels in hyperprolactinemic women monitored by nanopore thin film based assay: correlation with pregnancy-associated hormone prolactin. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 11:871-8. [PMID: 25659646 DOI: 10.1016/j.nano.2015.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 01/08/2015] [Accepted: 01/16/2015] [Indexed: 01/25/2023]
Abstract
UNLABELLED Hepcidin is a central regulator in human iron metabolism. Although it is often regarded as a promising indicator of iron status, the lack of effective quantification method has impeded the comprehensive assessment of its physiological and clinical significance. Herein we applied a newly established, nanopore film enrichment based hepcidin assay to examine the correlation between hepcidin and prolactin, the hormone with an important role during pregnancy and lactation. Women with pathologically elevated prolactin secretion (hyperprolactinemia) were found to have lower serum hepcidin compared to those with normal prolactin levels, without showing significant difference in other hepcidin-regulating factors. Moreover, prolactin-reducing drug bromocriptine mesylate resulted in elevated expression of the hepcidin in hyperprolactinemia patients. These findings suggest a possible role of prolactin in regulation of hepcidin, and may render hepcidin a useful biomarker for progress monitoring and treatment of iron-related diseases under hyperprolactinemic conditions. FROM THE CLINICAL EDITOR The level of hepcidin has been shown to reflect the underlying iron status of the patient. Nonentheless, there is an urgent need of reliable, fast and easy-to-do hepcidin assay in the clinical setting. In this paper, the authors described a further modification of their previously described nanopore silica film-based enrichment approach for quantification of hepcidin and found correlation between hepcidin and prolactin. This new knowledge may add to current understanding of iron homeostasis during pregnancy.
Collapse
Affiliation(s)
- Jing Wang
- Chinese Academy of Sciences Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology of China, Beijing, China; College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Gang Liu
- Chinese Academy of Sciences Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology of China, Beijing, China
| | - Zi Xu
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang, China
| | - Jiwei Dai
- Beijing Donghua Hospital, Beijing, China
| | - Ping Song
- Beijing Donghua Hospital, Beijing, China
| | - Jian Shi
- Chinese Academy of Sciences Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology of China, Beijing, China
| | - Ye Hu
- Department of Nanomedicine, Houston Methodist Hospital Research Institute, Houston, TX, USA
| | - Zhongbo Hu
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Guangjun Nie
- Chinese Academy of Sciences Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology of China, Beijing, China.
| | - Yan-Zhong Chang
- Laboratory of Molecular Iron Metabolism, College of Life Science, Hebei Normal University, Shijiazhuang, China.
| | - Yuliang Zhao
- Chinese Academy of Sciences Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology of China, Beijing, China.
| |
Collapse
|
10
|
Validation of hepcidin quantification in plasma using LC-HRMS and discovery of a new hepcidin isoform. Bioanalysis 2014; 5:2509-20. [PMID: 24138624 DOI: 10.4155/bio.13.225] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Hepcidin, a 25 amino acid peptide, plays an important role in iron homeostasis. Some hepcidin truncated peptides have antibiotic effects. RESULTS A new analytical method for hepcidin determination in human plasma using LC-HRMS operating in full-scan acquisition mode has been validated. The extraction consists of protein precipitation and a drying reconstitution step; a 2.1 x 50 mm (idxL) C18 analytical column was used. Detection specificity, stability, accuracy, precision and recoveries were determined. The LOQ/LOD were 0.25/0.1 nM, respectively. More than 600 injections of plasma extracts were performed, allowing evaluation of the assay robustness. Hepcidin-20, hepcidin-22 and a new isoform, hepcidin-24, were detected in patients. CONCLUSION The data underscore the usefulness of LC-HRMS for in-depth investigations related to hepcidin levels and pathways.
Collapse
|
11
|
Laarakkers CMM, Wiegerinck ET, Klaver S, Kolodziejczyk M, Gille H, Hohlbaum AM, Tjalsma H, Swinkels DW. Improved mass spectrometry assay for plasma hepcidin: detection and characterization of a novel hepcidin isoform. PLoS One 2013; 8:e75518. [PMID: 24124495 PMCID: PMC3790851 DOI: 10.1371/journal.pone.0075518] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 08/14/2013] [Indexed: 12/15/2022] Open
Abstract
Mass spectrometry (MS)-based assays for the quantification of the iron regulatory hormone hepcidin are pivotal to discriminate between the bioactive 25-amino acid form that can effectively block the sole iron transporter ferroportin and other naturally occurring smaller isoforms without a known role in iron metabolism. Here we describe the design, validation and use of a novel stable hepcidin-25+40 isotope as internal standard for quantification. Importantly, the relative large mass shift of 40 Da makes this isotope also suitable for easy-to-use medium resolution linear time-of-flight (TOF) platforms. As expected, implementation of hepcidin-25+40 as internal standard in our weak cation exchange (WCX) TOF MS method yielded very low inter/intra run coefficients of variation. Surprisingly, however, in samples from kidney disease patients, we detected a novel peak (m/z 2673.9) with low intensity that could be identified as hepcidin-24 and had previously remained unnoticed due to peak interference with the formerly used internal standard. Using a cell-based bioassay it was shown that synthetic hepcidin-24 was, like the -22 and -20 isoforms, a significantly less potent inducer of ferroportin degradation than hepcidin-25. During prolonged storage of plasma at room temperature, we observed that a decrease in plasma hepcidin-25 was paralleled by an increase in the levels of the hepcidin-24, -22 and -20 isoforms. This provides first evidence that all determinants for the conversion of hepcidin-25 to smaller inactive isoforms are present in the circulation, which may contribute to the functional suppression of hepcidin-25, that is significantly elevated in patients with renal impairment. The present update of our hepcidin TOF MS assay together with improved insights in the source and preparation of the internal standard, and sample stability will further improve our understanding of circulating hepcidin and pave the way towards further optimization and standardization of plasma hepcidin assays.
Collapse
Affiliation(s)
- Coby M. M. Laarakkers
- Laboratory of Genetic, Endocrine and Metabolic Diseases, Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
- Hepcidinanalysis.com, Nijmegen, The Netherlands
| | - Erwin T. Wiegerinck
- Laboratory of Genetic, Endocrine and Metabolic Diseases, Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
- Hepcidinanalysis.com, Nijmegen, The Netherlands
| | - Siem Klaver
- Laboratory of Genetic, Endocrine and Metabolic Diseases, Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
- Hepcidinanalysis.com, Nijmegen, The Netherlands
| | | | | | | | - Harold Tjalsma
- Laboratory of Genetic, Endocrine and Metabolic Diseases, Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
- Hepcidinanalysis.com, Nijmegen, The Netherlands
| | - Dorine W. Swinkels
- Laboratory of Genetic, Endocrine and Metabolic Diseases, Department of Laboratory Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
- Hepcidinanalysis.com, Nijmegen, The Netherlands
- * E-mail:
| |
Collapse
|
12
|
Lehmann S, Hoofnagle A, Hochstrasser D, Brede C, Glueckmann M, Cocho JA, Ceglarek U, Lenz C, Vialaret J, Scherl A, Hirtz C. Quantitative Clinical Chemistry Proteomics (qCCP) using mass spectrometry: general characteristics and application. Clin Chem Lab Med 2013. [DOI: 10.1515/cclm-2012-0723] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
13
|
Melvin Blaze MT, Aydin B, Carlson R, Hanley L. Identification and imaging of peptides and proteins on Enterococcus faecalis biofilms by matrix assisted laser desorption ionization mass spectrometry. Analyst 2012; 137:5018-25. [PMID: 22962657 PMCID: PMC3654527 DOI: 10.1039/c2an35922g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The heptapeptide ARHPHPH was identified from biofilms and planktonic cultures of two different strains of Enterococcus faecalis, V583 and ATCC 29212, using matrix assisted laser desorption ionization mass spectrometry (MALDI-MS). ARHPHPH was also imaged at the boundary of cocultured, adjacent E. faecalis and Escherichia coli (ATCC 25922) biofilms, appearing only on the E. faecalis side. ARHPHPH was proteolyzed from κ-casein, a component in the growth media, by E. faecalis microbes. Additionally, top down and bottom up proteomic approaches were combined to identify and spatially locate multiple proteins within intact E. faecalis V583 biofilms by MALDI-MS. The resultant tandem MS data were searched against the NCBInr E. faecalis V583 database to identify thirteen cytosolic and membrane proteins which have functional association with the cell surface. Two of these proteins, enolase and GAPDH, are glycolytic enzymes known to display multiple functions in bacterial virulence in related bacterial strains. This work illustrates a powerful approach for discovering and localizing multiple peptides and proteins within intact biofilms.
Collapse
Affiliation(s)
- M. T. Melvin Blaze
- Department of Chemistry, MC 111, University of Illinois at Chicago, Chicago, IL 60607-7061
| | - Berdan Aydin
- Department of Chemistry, MC 111, University of Illinois at Chicago, Chicago, IL 60607-7061
| | - Ross Carlson
- Center for Biofilm Engineering, Montana State University, Bozeman, MT 59717
| | - Luke Hanley
- Department of Chemistry, MC 111, University of Illinois at Chicago, Chicago, IL 60607-7061
| |
Collapse
|
14
|
Blaze MMT, Akhmetov A, Aydin B, Edirisinghe PD, Uygur G, Hanley L. Quantification of antibiotic in biofilm-inhibiting multilayers by 7.87 eV laser desorption postionization MS imaging. Anal Chem 2012; 84:9410-5. [PMID: 23017064 PMCID: PMC3491138 DOI: 10.1021/ac302230e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The potential of laser desorption postionization mass spectrometry (LDPI-MS) imaging for small molecule quantification is demonstrated here. The N-methylpiperazine acetamide (MPA) of ampicillin was adsorbed into polyelectrolyte multilayer surface coatings composed of chitosan and alginate, both high molecular weight biopolymers. These MPA-ampicillin spiked multilayers were then shown to inhibit the growth of Enterococcus faecalis biofilms that play a role in early stage infection of implanted medical devices. Finally, LDPI-MS imaging using 7.87 eV single-photon ionization was found to detect MPA-ampicillin within the multilayers before and after biofilm growth with limits of quantification and detection of 0.6 and 0.3 nmol, respectively. The capabilities of LDPI-MS imaging for small molecule quantification are compared to those of MALDI-MS. Furthermore, these results indicate that 7.87 eV LDPI-MS imaging should be applicable to quantification of a range of small molecular species on a variety of complex organic and biological surfaces. Finally, while MS imaging for quantification was demonstrated here using LDPI, it is a generally useful strategy that can be applied to other methods.
Collapse
Affiliation(s)
- Melvin M. T. Blaze
- Department of Chemistry, MC 111, University of Illinois at Chicago, Chicago, IL 60607
| | - Artem Akhmetov
- Department of Chemistry, MC 111, University of Illinois at Chicago, Chicago, IL 60607
| | - Berdan Aydin
- Department of Chemistry, MC 111, University of Illinois at Chicago, Chicago, IL 60607
| | | | - Gulsah Uygur
- Department of Chemistry, MC 111, University of Illinois at Chicago, Chicago, IL 60607
| | - Luke Hanley
- Department of Chemistry, MC 111, University of Illinois at Chicago, Chicago, IL 60607
| |
Collapse
|
15
|
Kroot JJC, van Herwaarden AE, Tjalsma H, Jansen RTP, Hendriks JCM, Swinkels DW. Second round robin for plasma hepcidin methods: first steps toward harmonization. Am J Hematol 2012; 87:977-83. [PMID: 22886770 DOI: 10.1002/ajh.23289] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2012] [Revised: 05/25/2012] [Accepted: 06/05/2012] [Indexed: 12/18/2022]
Abstract
Measurements of the iron regulatory hormone hepcidin by various methodologies and laboratories are not harmonized. As a result different numeric results are obtained for the same clinical sample. We investigated whether better agreement between plasma hepcidin methods can be achieved by harmonization. Native plasma pools (n = 11) of a variety of hepcidin concentrations and blank plasma spiked with three different quantities of synthetic hepcidin-25 purchased from two different commercial sources (n = 6), were distributed in duplicate among 21 methods worldwide. We assessed commutability by comparing results from synthetic hepcidin with those from native samples in various method couples by Bland-Altman plots. Methods differed substantially in absolute values and reproducibility. For the majority of methods we found that samples with synthetic hepcidin-25 were noncommutable with the native samples. In an attempt to harmonize by using native hepcidin results, we selected two methods that showed good mutual agreement of native results and calculated consensus values as the medians for the 11 duplicate native samples obtained by these two methods. Finally, we constructed algorithms enabling the laboratories to calculate the hepcidin consensus (HEPCON) value using their own native hepcidin results. We found that the use of these algorithms substantially reduced the between-method CV. Until commutable materials are defined, hepcidin harmonization can be achieved by exploiting specific algorithms, allowing each lab to report their native hepcidin concentrations in HEPCON values. This study represents the first step toward harmonization of plasma hepcidin methods and facilitates aggregation of hepcidin data from different research investigations.
Collapse
Affiliation(s)
- Joyce J C Kroot
- Department of Laboratory Medicine, Laboratory of Genetic Endocrine and Metabolic Diseases, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | | | | | | | | | | |
Collapse
|
16
|
Lemoine J, Fortin T, Salvador A, Jaffuel A, Charrier JP, Choquet-Kastylevsky G. The current status of clinical proteomics and the use of MRM and MRM(3) for biomarker validation. Expert Rev Mol Diagn 2012; 12:333-42. [PMID: 22616699 DOI: 10.1586/erm.12.32] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The transfer of biomarkers from the discovery field to clinical use is still, despite progress, on a road filled with pitfalls. Since the emergence of proteomics, thousands of putative biomarkers have been published, often with overlapping diagnostic capacities. The strengthening of the robustness of discovery technologies, particularly in mass spectrometry, has been followed by intense discussions on establishing well-defined evaluation procedures for the identified targets to ultimately allow the clinical validation and then the clinical use of some of these biomarkers. Some of the obstacles to the evaluation process have been the lack of the availability of quick and easy-to-develop, easy-to-use, robust, specific and sensitive alternative quantitative methods when immunoaffinity-based tests are unavailable. Multiple reaction monitoring (MRM; also called selected reaction monitoring) is currently proving its capabilities as a complementary or alternative technique to ELISA for large biomarker panel evaluation. Here, we present how MRM(3) can overcome the lack of specificity and sensitivity often encountered by MRM when tracking minor proteins diluted by complex biological matrices.
Collapse
Affiliation(s)
- Jérôme Lemoine
- UMR 5280 CNRS Université Lyon 1, Institut des Sciences Analytiques, Université de Lyon, 69622 Villeurbanne cedex, France
| | | | | | | | | | | |
Collapse
|
17
|
Scarano S, Vestri A, Ermini ML, Minunni M. SPR detection of human hepcidin-25: a critical approach by immuno- and biomimetic-based biosensing. Biosens Bioelectron 2012; 40:135-40. [PMID: 22835525 DOI: 10.1016/j.bios.2012.06.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 06/22/2012] [Accepted: 06/29/2012] [Indexed: 10/28/2022]
Abstract
The human hepcidin-25 hormone has a key role in iron regulation in blood. The clinical relevance of this hepatic ~2.8 kDa cysteine-rich peptide is rapidly increasing, since altered levels can be associated with inflammatory events and iron dysfunctions, such as hereditary hemochromatosis and iron overload. Moreover, hepcidin has also attracted the anti-doping field for its possible role as indirect marker of erythropoietin blood doping. Methods currently reported are based on immunoassays (ELISA and RIA), or various types of mass spectroscopy (MS)-based protocols, semi-quantitative or quantitative. Despite the great effort in optimizing robust and simple assays measuring hepcidin in real matrices, at present this challenge remains still an open issue. To explore the possibility to face hepcidin detection through the development of affinity-based biosensors, we set up a comparative study by surface plasmon resonance (SPR) technology. An immuno-based, on anti-hepcidin-25 IgG, and a biomimetic-based, on a synthetic peptide corresponding to the hepcidin-binding site on ferroportin (HBD), biosensors were developed. Here we report behaviors and analytical performances of the two systems, discussing limits and potentialities.
Collapse
Affiliation(s)
- S Scarano
- Dipartimento di Chimica Ugo Schiff e CSGI, Università di Firenze, via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy.
| | | | | | | |
Collapse
|
18
|
Parker CE, Domanski D, Percy AJ, Chambers AG, Camenzind AG, Smith DS, Borchers CH. Mass spectrometry in high-throughput clinical biomarker assays: multiple reaction monitoring. Top Curr Chem (Cham) 2012; 336:117-37. [PMID: 22886709 DOI: 10.1007/128_2012_353] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Clinical biomarker discovery, verification, and validation are facilitated by the latest technological advances in mass spectrometry. It is now possible to analyze simultaneously group of tens or hundreds of biomarkers in a blood sample using multiple reaction monitoring (MRM), a tandem mass spectrometric method. However, these newly-developed methods face new challenges, including standardization, calibration, and the determination of analytical and biological variation. Here we illustrate the background, pre-analytical sample preparation, and biomarker assay development using an MRM-mass spectrometric method. In addition, special attention is given to future standardization methods to enable widespread use of the technology.
Collapse
Affiliation(s)
- Carol E Parker
- University of Victoria - Genome BC Proteomics Centre, University of Victoria, #3101-4464 Markham Street, Vancouver Island Technology Park, Victoria, BC, V8Z 7X8, Canada
| | | | | | | | | | | | | |
Collapse
|