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Yu S, Zou Y, Ma X, Wang D, Luo W, Tang Y, Mu D, Zhang R, Cheng X, Qiu L. Evolution of LC-MS/MS in clinical laboratories. Clin Chim Acta 2024; 555:117797. [PMID: 38280490 DOI: 10.1016/j.cca.2024.117797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/22/2024] [Accepted: 01/22/2024] [Indexed: 01/29/2024]
Abstract
Liquid chromatography-tandem mass spectrometry (LC-MS/MS) has attracted significant attention in clinical practice owing to its numerous advantages. However, the widespread adoption of this technique is hindered by certain limitations, such as inappropriate analyte selection, low levels of automation, and a lack of specific reference intervals and quality control programs. This review comprehensively summarizes the current challenges associated with LC-MS/MS and proposes potential resolutions. The principle of utility should guide the selection of biomarkers, prioritizing their practical value over sheer quantity. To achieve full-process automation, methodological innovation is crucial for developing high-throughput equipment. Establishing reference intervals for mass spectrometry-based assays across multiple centers and diverse populations is essential for accurate result interpretation. Additionally, the development of commercial quality control materials assumes pivotal importance in ensuring assay reliability and reproducibility. Harmonization and standardization efforts should focus on the development of reference methods and materials for the clinical use of LC-MS/MS. In the future, commercial assay kits and laboratory-developed tests (LDTs) are expected to coexist in clinical laboratories, each offering distinct advantages. The collaborative efforts of diverse professionals is vital for addressing the challenges associated with the clinical application of LC-MS/MS. The anticipated advancements include simplification, increased automation, intelligence, and the standardization of LC-MS/MS, ultimately facilitating its seamless integration into clinical routines for both technicians and clinicians.
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Affiliation(s)
- Songlin Yu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Yutong Zou
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Xiaoli Ma
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Danchen Wang
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Wei Luo
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Yueming Tang
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Danni Mu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Ruiping Zhang
- Department of Laboratory Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Xinqi Cheng
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China.
| | - Ling Qiu
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China.
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Michiels TJM, van Veen MA, Meiring HD, Jiskoot W, Kersten GFA, Metz B. Common Reference-Based Tandem Mass Tag Multiplexing for the Relative Quantification of Peptides: Design and Application to Degradome Analysis of Diphtheria Toxoid. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2021; 32:1490-1497. [PMID: 33983728 PMCID: PMC8176455 DOI: 10.1021/jasms.1c00070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/23/2021] [Accepted: 04/23/2021] [Indexed: 06/12/2023]
Abstract
Currently, animal tests are being used to confirm the potency and lack of toxicity of toxoid vaccines. In a consistency approach, animal tests could be replaced if production consistency (compared to known good products) can be proven in a panel of in vitro assays. By mimicking the in vivo antigen processing in a simplified in vitro approach, it may be possible to distinguish aberrant products from good products. To demonstrate this, heat-exposed diphtheria toxoid was subjected to partial digestion by cathepsin S (an endoprotease involved in antigen processing), and the peptide formation/degradation kinetics were mapped for various heated toxoids. To overcome the limitations associated with the very large number of samples, we used common reference-based tandem mass tag (TMT) labeling. Instead of using one label per condition with direct comparison between the set of labels, we compared multiple labeled samples to a common reference (a pooled sample containing an aliquot of each condition). In this method, the number of samples is not limited by the number of unique TMT labels. This TMT multiplexing strategy allows for a 15-fold reduction of analysis time while retaining the reliability advantage of TMT labeling over label-free quantification. The formation of the most important peptides could be followed over time and compared among several conditions. The changes in enzymatic degradation kinetics of diphtheria toxoid revealed several suitable candidate peptides for use in a quality control assay that can distinguish structurally aberrant diphtheria toxoid from compliant toxoids.
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Affiliation(s)
- Thomas J. M. Michiels
- Division
of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, 2333 CC Leiden, The Netherlands
- Intravacc, Institute for Translational Vaccinology, 3721 MA Bilthoven, The Netherlands
| | - Madelief A. van Veen
- Division
of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, 2333 CC Leiden, The Netherlands
| | - Hugo D. Meiring
- Intravacc, Institute for Translational Vaccinology, 3721 MA Bilthoven, The Netherlands
| | - Wim Jiskoot
- Division
of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, 2333 CC Leiden, The Netherlands
| | - Gideon F. A. Kersten
- Division
of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, 2333 CC Leiden, The Netherlands
- Intravacc, Institute for Translational Vaccinology, 3721 MA Bilthoven, The Netherlands
| | - Bernard Metz
- Intravacc, Institute for Translational Vaccinology, 3721 MA Bilthoven, The Netherlands
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Zhang Q, Cai Z, Lin H, Han L, Yan J, Wang J, Ke P, Zhuang J, Huang X. Expression, purification and identification of isotope-labeled recombinant cystatin C protein in Escheichia coli intended for absolute quantification using isotope dilution mass spectrometry. Protein Expr Purif 2020; 178:105785. [PMID: 33152458 DOI: 10.1016/j.pep.2020.105785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 09/04/2020] [Accepted: 10/29/2020] [Indexed: 10/23/2022]
Abstract
Isotope-labeled proteins are expected to be used as internal standard proteins in the field of protein quantification by isotope dilution mass spectrometry (ID/MS). To achieve the absolute quantification of Cystatin C (Cys C) based on ID/MS, we aims to obtain 15N isotope-labeled recombinant Cys C (15N-Cys C) protein. Firstly, the Cys C gene was optimized based on the preferred codons of Escherichia coli, and inserted into the pET-28a(+) expression plasmid. Then, the plasmid was transformed into TOP10 and BL21 strains, and 15N-Cys C was expressed in M9 medium using 15N as the only nitrogen source. 15N-Cys C was detected by SDS-PAGE, protein immunoblotting and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS). The characteristic peptides obtained from 15N-Cys C were analyzed by a Q Exactive Plus MS system. Results showed that 53.06% of the codons were optimized. The codon adaptation index of the Cys C genes increased from 0.31 to 0.95, and the GC content was adjusted from 64.85% to 54.88%. The purity of 15N-Cys C was higher than 95%. MALDI-TOF MS analysis showed that the m/z of 15N-Cys C had changed from 13 449 to 14 850. The characteristic peptides showed that 619.79 m/z (M+2H)2+ was the parent ion of 15N-Cys C and that the secondary ions of 15N-labeled peptides from y+5 to y+9 were 616.27 m/z, 716.33 m/z, 788.39 m/z, 936.43 m/z, and 1052.46 m/z, respectively. In conclusion, we successfully expressed, purified and identified of 15N-Cys C protein in Escheichia coli intended for absolute quantification using ID/MS.
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Affiliation(s)
- Qiaoxuan Zhang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China; Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Zhiliang Cai
- Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Haibiao Lin
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Liqiao Han
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jun Yan
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jianbing Wang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Peifeng Ke
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Junhua Zhuang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Xianzhang Huang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China.
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A 3-min UPLC-MS/MS method for the simultaneous determination of plasma catecholamines and their metabolites: Method verification and diagnostic efficiency. Clin Biochem 2020; 87:67-73. [PMID: 33096053 DOI: 10.1016/j.clinbiochem.2020.10.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/24/2020] [Accepted: 10/16/2020] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To verify a rapid and sensitive ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method for the quantification of catecholamines and their metabolites, and to validate its efficiency for the diagnosis of phaeochromocytomas and paragangliomas (PPGLs). METHODS Plasma samples were pretreated with solid-phase extraction, followed by a 3-min UPLC-MS/MS analysis to quantify epinephrine (E), norepinephrine (NE), dopamine (DA), metanephrine (MN), normetanephrine (NMN) and 3-methoxytyramine (3-MT), simultaneously. The UPLC-MS/MS method was comprehensively verified and its diagnostic efficiency on PPGLs was tested using 7 PPGLs and 408 non-PPGLs patient plasma samples. RESULTS Using the developed method, the limit of detections (LODs) of the 6 analytes ranged from 0.0002 nmol/L (MN) to 0.0250 nmol/L (NE), while the lower limit of measuring intervals (LLMIs) ranged from 0.05 nmol/L (E, MN and NMN) to 0.10 nmol/L (NE and DA). The reportable ranges were 0.05-30.00 nmol/L for E, MN and NMN, 0.10-30.00 nmol/L for NE and DA, 1.00-300.00 pg/mL for 3-MT. No significant matrix effect was detected after correcting using internal standard. Besides, intra-day and inter-day precision were also within acceptance criteria with coefficient of variations (CVs) ≤ 15% and recoveries ranged from 95% to 115% for all the 6 analytes. The carryover effect was lower than 10%. Its diagnostic efficiency for PPGLs was significantly increased, the areas under the receiver operating characteristic (ROC) curves were increased from 68.7% to 89.1% (using E, NE and DA) to 75.2%-99.9% (using MN, NMN and 3-MT). CONCLUSION This study verified a rapid UPLC-MS/MS method for the determination of catecholamines and their metabolites in human plasma. It showed high diagnostic efficiency and will serve as an important tool to avoid the risk for missing patients with PPGLs.
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Mojsak P, Rey-Stolle F, Parfieniuk E, Kretowski A, Ciborowski M. The role of gut microbiota (GM) and GM-related metabolites in diabetes and obesity. A review of analytical methods used to measure GM-related metabolites in fecal samples with a focus on metabolites' derivatization step. J Pharm Biomed Anal 2020; 191:113617. [PMID: 32971497 DOI: 10.1016/j.jpba.2020.113617] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 12/12/2022]
Abstract
Disruption of gut microbiota (GM) composition is increasingly related to the pathogenesis of various metabolic diseases. Additionally, GM is responsible for the production and transformation of metabolites involved in the development of metabolic disorders, such as obesity and type 2 diabetes mellitus (T2DM). The current state of knowledge regarding the composition of GM and GM-related metabolites in relation to the progress and development of obesity and T2DM is presented in this review. To understand the relationships between GM-related metabolites and the development of metabolic disorders, their accurate qualitative and quantitative measurement in biological samples is needed. Feces represent a valuable biological matrix which composition may reflect the health status of the lower gastrointestinal tract and the whole organism. Mass spectrometry (MS), mainly in combination with gas chromatography (GC) or liquid chromatography (LC), is commonly used to measure fecal metabolites. However, profiling metabolites in such a complex matrix as feces is challenging from both analytical chemistry and biochemistry standpoints. Chemical derivatization is one of the most effective methods used to overcome these problems. In this review, we provide a comprehensive summary of the derivatization methods of GM-related metabolites prior to GC-MS or LC-MS analysis, which have been published in the last five years (2015-2020). Additionally, analytical methods used for the analysis of GM-related metabolites without the derivatization step are also presented.
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Affiliation(s)
- Patrycja Mojsak
- Metabolomics Laboratory, Clinical Research Centre, Medical University of Bialystok, Bialystok, Poland
| | - Fernanda Rey-Stolle
- Centre for Metabolomics and Bioanalysis (CEMBIO), Department of Chemistry and Biochemistry, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Urbanización Montepríncipe, 28660 Boadilla del Monte, Madrid, Spain
| | - Ewa Parfieniuk
- Metabolomics Laboratory, Clinical Research Centre, Medical University of Bialystok, Bialystok, Poland
| | - Adam Kretowski
- Metabolomics Laboratory, Clinical Research Centre, Medical University of Bialystok, Bialystok, Poland; Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Bialystok, Bialystok, Poland
| | - Michal Ciborowski
- Metabolomics Laboratory, Clinical Research Centre, Medical University of Bialystok, Bialystok, Poland.
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Rajasekeran H, Lytvyn Y, Bozovic A, Lovshin JA, Diamandis E, Cattran D, Husain M, Perkins BA, Advani A, Reich HN, Kulasingam V, Cherney DZI. Urinary adenosine excretion in type 1 diabetes. Am J Physiol Renal Physiol 2017; 313:F184-F191. [DOI: 10.1152/ajprenal.00043.2017] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 03/30/2017] [Accepted: 04/03/2017] [Indexed: 11/22/2022] Open
Abstract
In experimental models of diabetes, augmented sodium-glucose cotransport-2 (SGLT2) activity diminishes sodium (Na+) delivery at the macula densa. As a result, less vasoconstrictive adenosine is generated, leading to afferent arteriolar vasodilatation and hyperfiltration. The measurement and significance of urinary adenosine in humans has not been examined extensively in states of renal hemodynamic impairment like that of diabetes. Our aim was to validate a method for urine adenosine quantification in humans and perform an exploratory post hoc analysis to determine whether urinary adenosine levels change dynamically in response to natriuresis in patients with type 1 diabetes (T1D) before and after treatment with the SGLT2 inhibitor (SGLT2i) empagliflozin. We hypothesized that SGLT2i, which reduces renal hyperfiltration through increased Na+delivery to the macula densa, would increase urinary adenosine excretion. Urine adenosine corrected for creatinine was measured using our validated liquid chromatography-tandem mass spectrometry (LC-MS/MS) method in 40 healthy participants and 40 patients with T1D. In the T1D cohort, measurements were performed during clamped euglycemic and hyperglycemic conditions before and following 8 wk of SGLT2i therapy. Urinary adenosine was detectable in healthy subjects (0.32 ± 0.11 µmol/mmol Cr) and patients with T1D. In response to SGLT2i, urine adenosine increased during clamped hyperglycemia (0.40 ± 0.11 vs. 0.45 ± 0.12 µmol/mmol Cr, P = 0.005). Similar trends were observed during clamped euglycemia ( P = 0.08). In conclusion, SGLT2i increases urinary adenosine excretion under clamped hyperglycemic conditions in patients with T1D. The potentially protective role of SGLT2i against glomerular hyperfiltration and its mediation by adenosine in diabetes merits further study.
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Affiliation(s)
- Harindra Rajasekeran
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Onatario, Canada
| | - Yuliya Lytvyn
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Andrea Bozovic
- Departments of Clinical Biochemistry and Laboratory Medicine and Pathobiology, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Julie A. Lovshin
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
- Division of Endocrinology and Metabolism, Department of Medicine, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Eleftherios Diamandis
- Departments of Clinical Biochemistry and Laboratory Medicine and Pathobiology, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Daniel Cattran
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Mansoor Husain
- Division of Cardiology, Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada; and
| | - Bruce A. Perkins
- Division of Endocrinology and Metabolism, Department of Medicine, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Andrew Advani
- Division of Endocrinology, Department of Medicine, Saint Michael’s Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Heather N. Reich
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Vathany Kulasingam
- Departments of Clinical Biochemistry and Laboratory Medicine and Pathobiology, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - David Z. I. Cherney
- Division of Nephrology, Department of Medicine, University Health Network, University of Toronto, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Onatario, Canada
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Preanalytical variables for liquid chromatography-mass spectrometry (LC-MS) analysis of human blood specimens. Clin Biochem 2017; 50:582-586. [DOI: 10.1016/j.clinbiochem.2017.04.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/10/2017] [Accepted: 04/17/2017] [Indexed: 12/26/2022]
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8
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Eisenhofer G, Peitzsch M, McWhinney BC. Impact of LC-MS/MS on the laboratory diagnosis of catecholamine-producing tumors. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.01.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Panis C, Pizzatti L, Souza GF, Abdelhay E. Clinical proteomics in cancer: Where we are. Cancer Lett 2016; 382:231-239. [PMID: 27561426 DOI: 10.1016/j.canlet.2016.08.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 08/16/2016] [Accepted: 08/17/2016] [Indexed: 12/25/2022]
Abstract
Proteomics has emerged as a promising field in the post-genomic era. Notwithstanding the great advances provided by gene expression analysis in cancer, the lack of a correlation between gene expression and protein levels has highlighted the need for a proteomic focus on cancer. Although the increasing knowledge regarding cancer biology, a reliable marker to improve diagnosis, prognosis and treatment for cancer patients is not a reality at present. In this review, we address the main considerations regarding proteomics-based studies and their clinical applications on cancer research, highlighting some considerations related to strengths and limitations of proteomics-based studies and its application to clinical practice.
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Affiliation(s)
- Carolina Panis
- Laboratório de Células Tronco, Instituto Nacional de Câncer, INCA, Rio de Janeiro, Brazil; Laboratório de Mediadores Inflamatórios, Universidade Estadual do Oeste do Paraná, UNIOESTE, Campus Francisco Beltrão, Paraná, Brazil.
| | - Luciana Pizzatti
- Laboratório de Biologia Molecular e Proteômica do Sangue - LABMOPS, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Eliana Abdelhay
- Laboratório de Células Tronco, Instituto Nacional de Câncer, INCA, Rio de Janeiro, Brazil
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Alvarez MJ, Shen Y, Giorgi FM, Lachmann A, Ding BB, Ye BH, Califano A. Functional characterization of somatic mutations in cancer using network-based inference of protein activity. Nat Genet 2016; 48:838-47. [PMID: 27322546 PMCID: PMC5040167 DOI: 10.1038/ng.3593] [Citation(s) in RCA: 507] [Impact Index Per Article: 63.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 05/23/2016] [Indexed: 01/05/2023]
Abstract
Identifying the multiple dysregulated oncoproteins that contribute to tumorigenesis in a given patient is crucial for developing personalized treatment plans. However, accurate inference of aberrant protein activity in biological samples is still challenging as genetic alterations are only partially predictive and direct measurements of protein activity are generally not feasible. To address this problem we introduce and experimentally validate a new algorithm, virtual inference of protein activity by enriched regulon analysis (VIPER), for accurate assessment of protein activity from gene expression data. We used VIPER to evaluate the functional relevance of genetic alterations in regulatory proteins across all samples in The Cancer Genome Atlas (TCGA). In addition to accurately infer aberrant protein activity induced by established mutations, we also identified a fraction of tumors with aberrant activity of druggable oncoproteins despite a lack of mutations, and vice versa. In vitro assays confirmed that VIPER-inferred protein activity outperformed mutational analysis in predicting sensitivity to targeted inhibitors.
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Affiliation(s)
- Mariano J. Alvarez
- Department of Systems Biology, Columbia University, New York, USA
- DarwinHealth Inc., New York, USA
| | - Yao Shen
- Department of Systems Biology, Columbia University, New York, USA
- DarwinHealth Inc., New York, USA
| | | | | | - B. Belinda Ding
- Department of Cell Biology, Albert Einstein College of Medicine, New York, USA
| | - B. Hilda Ye
- Department of Cell Biology, Albert Einstein College of Medicine, New York, USA
| | - Andrea Califano
- Department of Systems Biology, Columbia University, New York, USA
- Department of Biomedical Informatics, Columbia University, New York, USA
- Department of Biochemistry & Molecular Biophysics, Columbia University, New York, USA
- Institute for Cancer Genetics, Columbia University, New York, USA
- Motor Neuron Center, Columbia University, New York, USA
- Columbia Initiative in Stem Cells, Columbia University, New York, USA
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11
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Review: LC coupled to low- and high-resolution mass spectrometry for new psychoactive substance screening in biological matrices - Where do we stand today? Anal Chim Acta 2016; 927:13-20. [PMID: 27237833 DOI: 10.1016/j.aca.2016.04.046] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 04/22/2016] [Accepted: 04/25/2016] [Indexed: 12/14/2022]
Abstract
The field of new psychoactive substances (NPS) is highly dynamic and the situation changes from year to year. Therefore, the current review provides a timely update about the latest developments to help analysts keep the pace with NPS distribution. It covers PubMed-listed studies published between January 2014 and January 2016 dealing with the application of liquid chromatography (LC) coupled low- and high-resolution mass spectrometry (MS) for broad screenings for NPS in clinical (CT) and forensic (FT) toxicology. Latest developments and applications are highlighted and selected papers critically discussed. Comprehensive tables summarizing all discussed articles complete the overview. Finally, an outlook on the future of LC coupled MS in CT and FT is provided and readers will learn why low-resolution mass spectrometry might remain the standard for the next couple of years at least for easy-to-use quantitative screening procedures.
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12
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Sistik P, Turjap M, Iordache AM, Saldanha HM, Lemr K, Bednar P. Quantification of selected antidepressants and antipsychotics in clinical samples using chromatographic methods combined with mass spectrometry: A review (2006-2015). Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2016; 160:39-53. [DOI: 10.5507/bp.2015.065] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 12/04/2015] [Indexed: 12/24/2022] Open
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13
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Mil’man BL, Zhurkovich IK. Mass spectrometric analysis of medical samples and aspects of clinical diagnostics. JOURNAL OF ANALYTICAL CHEMISTRY 2015. [DOI: 10.1134/s1061934815100135] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Bratkowska D, Shobo A, Singh S, A. Bester L, Kruger HG, Maguire GE, Govender T. Determination of the antitubercular drug PA-824 in rat plasma, lung and brain tissues by liquid chromatography tandem mass spectrometry: Application to a pharmacokinetic study. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 988:187-94. [DOI: 10.1016/j.jchromb.2015.02.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 02/25/2015] [Accepted: 02/26/2015] [Indexed: 11/16/2022]
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15
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Smith ME, Knolls SA, Thompson M, Masterson DS. An ESI-MS method to determine yield and enantioselectivity in a single assay. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2015; 26:397-403. [PMID: 25510928 DOI: 10.1007/s13361-014-1041-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 10/25/2014] [Accepted: 10/26/2014] [Indexed: 06/04/2023]
Abstract
A mass spectrometry assay is presented here that allows for the simultaneous determination of yield and enantioselectivity in a single analysis. The assay makes use of molecules that are structurally similar to the analytes of interest as standards. The assay predicts the yields of the reactions reasonably well and with little error. For example, in the pig liver esterase catalyzed hydrolysis of one prochiral malonate, the yield predicted by the assay was 72%, while larger scale isolated reaction yields were within 5% of this value. This assay provides a fast method to determine yield and enantioselectivity in one analysis. The strengths and limitations of this method are discussed.
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Affiliation(s)
- Maureen E Smith
- Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, MS, 39406, USA
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16
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Gianazza E, Tremoli E, Banfi C. The selected reaction monitoring/multiple reaction monitoring-based mass spectrometry approach for the accurate quantitation of proteins: clinical applications in the cardiovascular diseases. Expert Rev Proteomics 2014; 11:771-88. [PMID: 25400095 DOI: 10.1586/14789450.2014.947966] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Selected reaction monitoring, also known as multiple reaction monitoring, is a powerful targeted mass spectrometry approach for a confident quantitation of proteins/peptides in complex biological samples. In recent years, its optimization and application have become pivotal and of great interest in clinical research to derive useful outcomes for patient care. Thus, selected reaction monitoring/multiple reaction monitoring is now used as a highly sensitive and selective method for the evaluation of protein abundances and biomarker verification with potential applications in medical screening. This review describes technical aspects for the development of a robust multiplex assay and discussing its recent applications in cardiovascular proteomics: verification of promising disease candidates to select only the highest quality peptides/proteins for a preclinical validation, as well as quantitation of protein isoforms and post-translational modifications.
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Affiliation(s)
- Erica Gianazza
- Laboratory of Cell Biology and Biochemistry of Atherothrombosis, Unit of Proteomics, Centro Cardiologico Monzino IRCCS, Via Parea 4, 20138 Milan, Italy
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Du HL, Chen ZP, Song M, Chen Y, Yu RQ. Novel calibration model maintenance strategy for solving the signal instability in quantitative liquid chromatography–mass spectrometry. J Chromatogr A 2014; 1338:44-50. [DOI: 10.1016/j.chroma.2014.02.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 02/11/2014] [Accepted: 02/12/2014] [Indexed: 10/25/2022]
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