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Goelen J, Farrell G, McGeehan J, Titman CM, J W Rattray N, Johnson TN, Horniblow RD, Batchelor HK. Quantification of drug metabolising enzymes and transporter proteins in the paediatric duodenum via LC-MS/MS proteomics using a QconCAT technique. Eur J Pharm Biopharm 2023; 191:68-77. [PMID: 37625656 DOI: 10.1016/j.ejpb.2023.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 08/13/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023]
Abstract
Characterising the small intestine absorptive membrane is essential to enable prediction of the systemic exposure of oral formulations. In particular, the ontogeny of key intestinal Drug Metabolising Enzymes and Transporter (DMET) proteins involved in drug disposition needs to be elucidated to allow for accurate prediction of the PK profile of drugs in the paediatric cohort. Using pinch biopsies from the paediatric duodenum (n = 36; aged 11 months to 15 years), the abundance of 21 DMET proteins and two enterocyte markers were quantified via LC-MS/MS. An established LCMS nanoflow method was translated to enable analysis on a microflow LC system, and a new stable-isotope-labelled QconCAT standard developed to enable quantification of these proteins. Villin-1 was used to standardise abundancy values. The observed abundancies and ontogeny profiles, agreed with adult LC-MS/MS-based data, and historic paediatric data obtained via western blotting. A linear trend with age was observed for duodenal CYP3A4 and CES2 only. As this work quantified peptides on a pinch biopsy coupled with a microflow method, future studies using a wider population range are very feasible. Furthermore, this DMET ontogeny data can be used to inform paediatric PBPK modelling and to enhance the understanding of oral drug absorption and gut bioavailability in paediatric populations.
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Affiliation(s)
- Jan Goelen
- School of Pharmacy, University of Birmingham, Birmingham B15 2TT, UK; Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
| | - Gillian Farrell
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
| | | | | | - Nicholas J W Rattray
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
| | | | - Richard D Horniblow
- School of Biomedical Science, University of Birmingham, Birmingham B15 2TT, UK
| | - Hannah K Batchelor
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK.
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2
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Bijttebier S, Rodrigues Martins D, Mertens L, Grauwen K, Bruinzeel W, Willems R, Bartolomé-Nebreda JM, Theunis C, Bretteville A, Ebneth A, Dillen L. IP-LC-MSMS Enables Identification of Three Tau O-GlcNAcylation Sites as O-GlcNAcase Inhibition Pharmacodynamic Readout in Transgenic Mice Overexpressing Human Tau. J Proteome Res 2023; 22:1309-1321. [PMID: 36888912 DOI: 10.1021/acs.jproteome.2c00822] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2023]
Abstract
O-β-linked N-acetylglucosaminylation (O-GlcNAcylation) modulates tau phosphorylation and aggregation: the pharmacological increase of tau O-GlcNAcylation upon treatment with inhibitors of O-GlcNAc hydrolase (OGA) constitutes a potential strategy to tackle neurodegenerative diseases. Analysis of tau O-GlcNAcylation could potentially be used as a pharmacodynamic biomarker both in preclinical and clinical studies. The goal of the current study was to confirm tau O-GlcNAcylation at S400 as a pharmacodynamic readout of OGA inhibition in P301S transgenic mice overexpressing human tau and treated with the OGA inhibitor Thiamet G and to explore if additional O-GlcNAcylation sites on tau could be identified. As a first step, an immunoprecipitation-liquid chromatography-mass spectrometry (IP-LC-MS) methodology was developed to monitor changes in O-GlcNAcylation around S400 of tau in mouse brain homogenate (BH) extracts. Second, additional O-GlcNAc sites were identified in in-house produced recombinant O-GlcNAcylated human tau at relatively high concentrations, thereby facilitating collection of informative LC-MS data for identification of low-concentration O-GlcNAc-tryptic tau peptides in human transgenic mouse BH extracts. This strategy enabled, for the first time, identification of three low abundant N-terminal and mid-domain O-GlcNAc sites of tau (at S208, S191, and S184 or S185) in human transgenic mouse BH. Data are openly available at data.mendeley.com (doi: 10.17632/jp57yk9469.1; doi: 10.17632/8n5j45dnd8.1; doi: 10.17632/h5vdrx4n3d.1).
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Affiliation(s)
- Sebastiaan Bijttebier
- Bioanalytical Discovery & Development Sciences, Janssen R&D, Turnhoutseweg 30, 2340 Beerse, Belgium
| | | | - Liesbeth Mertens
- R&D Neurosciences, Janssen R&D, Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Karolien Grauwen
- R&D Neurosciences, Janssen R&D, Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Wouter Bruinzeel
- R&D Structural & Protein Sciences, Janssen R&D, Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Roland Willems
- R&D Neurosciences, Janssen R&D, Turnhoutseweg 30, 2340 Beerse, Belgium
| | | | - Clara Theunis
- R&D Neurosciences, Janssen R&D, Turnhoutseweg 30, 2340 Beerse, Belgium
| | | | - Andreas Ebneth
- R&D Neurosciences, Janssen R&D, Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Lieve Dillen
- Bioanalytical Discovery & Development Sciences, Janssen R&D, Turnhoutseweg 30, 2340 Beerse, Belgium
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3
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Wang X, Shi J, Zhu HJ. Targeted Absolute Protein Quantification Using SILAC Internal Standard and Full-Length Protein Calibrators (TAQSI). Methods Mol Biol 2023; 2603:269-283. [PMID: 36370287 DOI: 10.1007/978-1-0716-2863-8_22] [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] [Indexed: 06/16/2023]
Abstract
Mass spectrometry (MS)-based proteomics has been increasingly used for targeted absolute protein quantifications in both basic and clinical research. There is a great need to overcome some pitfalls of current MS-based targeted absolute protein quantification methods, such as high inter-assay variability and high cost associated with the use of synthesized isotopic peptides/proteins. Here we describe a targeted absolute protein quantification method utilizing SILAC internal standards and unlabeled full-length protein calibrators (TAQSI). The method has proven accurate, precise, reproducible, and cost-effective. Notably, the method is resistant to the variabilities caused by protein extraction and digestion. Moreover, it avoids measurement errors due to nonsynonymous mutations. This versatile method can be used for determining the absolute expressions of numerous proteins in various biological samples. As a proof-of-concept, this method was successfully applied to absolutely quantitate the protein expressions of carboxylesterase 1 (CES1) in human liver tissues.
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Affiliation(s)
- Xinwen Wang
- Department of Pharmaceutical Sciences, Northeast Ohio Medical University, Rootstown, OH, USA
| | - Jian Shi
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, MI, USA
| | - Hao-Jie Zhu
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, MI, USA.
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4
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Vasilogianni AM, El-Khateeb E, Al-Majdoub ZM, Alrubia S, Rostami-Hodjegan A, Barber J, Achour B. Proteomic quantification of perturbation to pharmacokinetic target proteins in liver disease. J Proteomics 2022; 263:104601. [DOI: 10.1016/j.jprot.2022.104601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 04/06/2022] [Accepted: 04/25/2022] [Indexed: 10/18/2022]
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5
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Barber J, Al-Majdoub ZM, Couto N, Vasilogianni AM, Tillmann A, Alrubia S, Rostami-Hodjegan A, Achour B. Label-Free but Still Constrained: Assessment of Global Proteomic Strategies for the Quantification of Hepatic Enzymes and Transporters . Drug Metab Dispos 2022; 50:762-769. [DOI: 10.1124/dmd.121.000780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 03/04/2022] [Indexed: 11/22/2022] Open
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6
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Vasilogianni AM, El-Khateeb E, Achour B, Alrubia S, Rostami-Hodjegan A, Barber J, Al-Majdoub ZM. A family of QconCATs (Quantification conCATemers) for the quantification of human pharmacological target proteins. J Proteomics 2022; 261:104572. [DOI: 10.1016/j.jprot.2022.104572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/15/2022] [Accepted: 03/19/2022] [Indexed: 11/29/2022]
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7
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El-Khateeb E, Al-Majdoub ZM, Rostami-Hodjegan A, Barber J, Achour B. Proteomic Quantification of Changes in Abundance of Drug-Metabolizing Enzymes and Drug Transporters in Human Liver Cirrhosis: Different Methods, Similar Outcomes. Drug Metab Dispos 2021; 49:610-618. [PMID: 34045218 DOI: 10.1124/dmd.121.000484] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 05/21/2021] [Indexed: 02/06/2023] Open
Abstract
Model-based assessment of the effects of liver disease on drug pharmacokinetics requires quantification of changes in enzymes and transporters responsible for drug metabolism and disposition. Different proteomic methods are currently used for protein quantification in tissues and in vitro systems, each with specific procedures and requirements. The outcome of quantitative proteomic assays using four different methods (one targeted and three label-free) applied to the same sample set was compared in this study. Three pooled cirrhotic liver microsomal samples corresponding to cirrhosis with nonalcoholic fatty liver disease, biliary disease, or cancer and a control microsomal pool were analyzed using quantification concatemer-based targeted proteomics, the total protein approach (TPA), high three ion intensity (Hi3) approach, and intensity-based absolute quantification (iBAQ) to determine the absolute and relative abundance in disease compared with control. The relative abundance data provided a "disease perturbation factor" (DPF) for each target protein. Absolute and relative abundances generated by standard-based label-free methods (iBAQ and Hi3) showed good agreement with targeted proteomics (limited bias and scatter), but TPA (standard-free method) overestimated absolute abundances by approximately 2-fold. The DPF was consistent between different proteomic methods but varied between enzymes and transporters, indicating discordance of effects of cirrhosis on various metabolism-related proteins. The DPF ranged from no change (e.g., for glucuronosyltransferase-1A6 in nonalcoholic fatty liver disease group) to less than 0.3 (e.g., carboxylesterases-1 in cirrhosis of biliary origin). SIGNIFICANCE STATEMENT: This study demonstrated that relative changes in enzymes and transporters (DPF) are independent of the quantitative proteomic methods used. Standard-based label-free methods, such as high three ion intensity (Hi3) and intensity-based absolute quantification (iBAQ) methods, were less biased and more precise than the total protein approach (TPA) when compared with targeted data. The DPF reconciled differences across proteomic methods observed with absolute levels. Using this approach, differences were revealed in the expression of enzymes/transporters in cirrhosis associated with different etiologies.
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Affiliation(s)
- Eman El-Khateeb
- Centre for Applied Pharmacokinetic Research, University of Manchester, Manchester, UK (E.E.-K., Z.M.A.-M., A.R.-H., J.B., B.A.); Clinical Pharmacy Department, Faculty of Pharmacy, Tanta University, Tanta, Egypt (E.E.-K.); and Certara UK Ltd. (Simcyp Division), Sheffield, UK (A.R.-H.)
| | - Zubida M Al-Majdoub
- Centre for Applied Pharmacokinetic Research, University of Manchester, Manchester, UK (E.E.-K., Z.M.A.-M., A.R.-H., J.B., B.A.); Clinical Pharmacy Department, Faculty of Pharmacy, Tanta University, Tanta, Egypt (E.E.-K.); and Certara UK Ltd. (Simcyp Division), Sheffield, UK (A.R.-H.)
| | - Amin Rostami-Hodjegan
- Centre for Applied Pharmacokinetic Research, University of Manchester, Manchester, UK (E.E.-K., Z.M.A.-M., A.R.-H., J.B., B.A.); Clinical Pharmacy Department, Faculty of Pharmacy, Tanta University, Tanta, Egypt (E.E.-K.); and Certara UK Ltd. (Simcyp Division), Sheffield, UK (A.R.-H.)
| | - Jill Barber
- Centre for Applied Pharmacokinetic Research, University of Manchester, Manchester, UK (E.E.-K., Z.M.A.-M., A.R.-H., J.B., B.A.); Clinical Pharmacy Department, Faculty of Pharmacy, Tanta University, Tanta, Egypt (E.E.-K.); and Certara UK Ltd. (Simcyp Division), Sheffield, UK (A.R.-H.)
| | - Brahim Achour
- Centre for Applied Pharmacokinetic Research, University of Manchester, Manchester, UK (E.E.-K., Z.M.A.-M., A.R.-H., J.B., B.A.); Clinical Pharmacy Department, Faculty of Pharmacy, Tanta University, Tanta, Egypt (E.E.-K.); and Certara UK Ltd. (Simcyp Division), Sheffield, UK (A.R.-H.)
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8
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Kumar S, Bouic PJ, Rosenkranz B. Investigation of CYP2B6, 3A4 and β-esterase interactions of Withania somnifera (L.) dunal in human liver microsomes and HepG2 cells. JOURNAL OF ETHNOPHARMACOLOGY 2021; 270:113766. [PMID: 33395575 DOI: 10.1016/j.jep.2020.113766] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 10/27/2020] [Accepted: 12/24/2020] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Withania somnifera (L.) Dunal (Solanaceae) is a traditional herb, used in African indigenous systems of medicine for the treatment of various diseases (including HIV/AIDS and tuberculosis). The relevance of clinically significant interactions of Withania with ARVs and anti-TB drugs needs to be investigated. AIM OF THE STUDY This study evaluated the effects of its roots on cytochromes P450 (CYPs) 2B6, 3A4, and rifampicin metabolism pathway, using methanol, ethanol, aqueous, and ethyl acetate solvent extractions. MATERIALS AND METHODS The extracts were tested on human liver microsomes (HLM) for CYP inhibition, mRNA expression in HepG2 cells for CYP induction. Biochemical qualitative tests and LC-MS/MS methodology were used to determine active phytoconstituents. RESULTS The methanolic and ethyl acetate extracts inhibited CYP2B6 with IC50s 79.16 and 57.96 μg/ml respectively, while none of the extracts had any effect on rifampicin metabolism or showed time-dependant inhibition (TDI). All extracts were moderate inducers of CYP3A4; the aqueous extract exhibited 38%-fold shift induction of CYP3A4 compared to the control. The methanolic extract had the lowest CTC50 (50% of cytotoxicity inhibition) (67.13 ± 0.83 μg/ml). LC-MS/MS-PDA full scans were consistent with the presence of flavone salvigenin (m/z 327), alkaloid isopelletierine (m/z 133), steroidal lactone 2,3-dihydrowithaferin-A (m/z 472), and other withanolides including withaperuvin I (m/z 533), withaferin derivative (m/z 567), some of these compounds likely being responsible for the observed CYP2B6 inhibition and CYP3A4 induction. The putative gastrointestinal tract (GIT) concentration for the active extracts was 1800 μg/ml and the hepatic circulation concentrations were estimated at about 220 μg/ml and 13.5 μg/ml for the methanolic and ethyl acetate extracts, respectively. The extrapolated in vivo percentage of inhibition was at 85% for the methanolic extract against CYP2B6. CONCLUSIONS The findings reported in this study suggest that W. somnifera extracts have the potential of causing clinically significant herb-drug interactions (HDI) as moderate inducer of CYP3A4 and inhibitor of CYP2B6 metabolism pathway (methanol and ethyl acetate extracts).
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Affiliation(s)
- Saneesh Kumar
- Division of Clinical Pharmacology, University of Stellenbosch, Cape Town, South Africa.
| | - Patrick J Bouic
- Division of Medical Microbiology, University of Stellenbosch, Cape Town, South Africa; Synexa Life Sciences, Montague Gardens, Cape Town, South Africa.
| | - Bernd Rosenkranz
- Division of Clinical Pharmacology, University of Stellenbosch, Cape Town, South Africa.
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9
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Truong HND, Lim J. Quantitative Proteomics Using
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Labeling on Target Peptides and Unlabeled Standards. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hai Ngo Dang Truong
- Department of Chemistry Changwon National University Changwon 51140 South Korea
| | - Jae‐Min Lim
- Department of Chemistry Changwon National University Changwon 51140 South Korea
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10
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Ahire DS, Basit A, Karasu M, Prasad B. Ultrasensitive Quantification of Drug-metabolizing Enzymes and Transporters in Small Sample Volume by Microflow LC-MS/MS. J Pharm Sci 2021; 110:2833-2840. [PMID: 33785352 DOI: 10.1016/j.xphs.2021.03.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 03/25/2021] [Accepted: 03/25/2021] [Indexed: 01/31/2023]
Abstract
Protein abundance data of drug-metabolizing enzymes and transporters (DMETs) are broadly applicable to the characterization of in vitro and in vivo models, in vitro to in vivo extrapolation (IVIVE), and interindividual variability prediction. However, the emerging need of DMET quantification in small sample volumes such as organ-on a chip effluent, organoids, and biopsies requires ultrasensitive protein quantification methods. We present an ultrasensitive method that relies on an optimized sample preparation approach involving acetone precipitation coupled with a microflow-based liquid chromatography-tandem mass spectrometry (µLC-MS/MS) for the DMET quantification using limited sample volume or protein concentration, i.e., liver tissues (1-100 mg), hepatocyte counts (~4000 to 1 million cells), and microsomal protein concentration (0.01-1 mg/ml). The method was applied to quantify DMETs in differential tissue S9 fractions (liver, intestine, kidney, lung, and heart) and cryopreserved human intestinal mucosa (i.e., CHIM). The method successfully quantified >75% of the target DMETs in the trypsin digests of 1 mg tissue homogenate, 15,000 hepatocytes, and 0.06 mg/ml microsomal protein concentration. The precision of DMET quantification measured as the coefficient of variation across different tissue weights, cell counts, or microsomal protein concentration was within 30%. The method confirmed significant extrahepatic abundance of non-cytochrome P450 enzymes such as dihydropyridine dehydrogenase (DPYD), epoxide hydrolases (EPXs), arylacetamide deacetylase (AADAC), paraoxonases (PONs), and glutathione S-transferases (GSTs). The ultrasensitive method developed here is applicable to characterize emerging miniaturized in vitro models and small volume biopsies. In addition, the differential tissue abundance data of the understudied DMETs will be important for physiologically-based pharmacokinetic (PBPK) modeling of drugs.
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Affiliation(s)
- Deepak Suresh Ahire
- Department of Pharmaceutical Sciences, Washington State University, 12 E Spokane Falls Blvd, Spokane, WA 99202, USA
| | - Abdul Basit
- Department of Pharmaceutical Sciences, Washington State University, 12 E Spokane Falls Blvd, Spokane, WA 99202, USA
| | - Matthew Karasu
- Department of Pharmaceutical Sciences, Washington State University, 12 E Spokane Falls Blvd, Spokane, WA 99202, USA
| | - Bhagwat Prasad
- Department of Pharmaceutical Sciences, Washington State University, 12 E Spokane Falls Blvd, Spokane, WA 99202, USA.
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11
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Sielaff M, Curella V, Neerukonda M, Afzal M, El Hassouni K, Distler U, Schuppan D, Longin CFH, Tenzer S. Hybrid QconCAT-Based Targeted Absolute and Data-Independent Acquisition-Based Label-Free Quantification Enables In-Depth Proteomic Characterization of Wheat Amylase/Trypsin Inhibitor Extracts. J Proteome Res 2021; 20:1544-1557. [PMID: 33507751 DOI: 10.1021/acs.jproteome.0c00752] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Wheat amylase/trypsin inhibitors (ATIs) have gained significant relevance as inducers of intestinal and extra-intestinal inflammation. In this study, we present a novel hybrid data-independent acquisition (DIA) liquid chromatography-mass spectrometry (LC-MS) approach, combining QconCAT technology with short microflow LC gradients and DIA and apply the method toward the quantitative proteome analysis of ATI extracts. The presented method is fast, robust, and reproducible and provides precise QconCAT-based absolute quantification of major ATI proteins while simultaneously quantifying the proteome by label-free quantification (LFQ). We analyzed extracts of 60 varieties of common wheat grown in replication and evaluated the reproducibility and precision of the workflow for the quantification of ATIs. Applying the method to analyze different wheat species (i.e., common wheat, spelt, durum wheat, emmer, and einkorn) and comparing the results to published data, we validated inter-laboratory and cross-methodology reproducibility of ATI quantification, which is essential in the context of large-scale breeding projects. Additionally, we applied our workflow to assess environmental effects on ATI expression, analyzing ATI content and proteome of same varieties grown at different locations. Finally, we explored the potential of combining QconCAT-based absolute quantification with DIA-based LFQ proteome analysis for the generation of new hypotheses or assay development.
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Affiliation(s)
- Malte Sielaff
- Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1, 55131 Mainz, Germany
| | - Valentina Curella
- Institute of Translational Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1, 55131 Mainz, Germany
| | - Manjusha Neerukonda
- Institute of Translational Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1, 55131 Mainz, Germany
| | - Muhammad Afzal
- State Plant Breeding Institute, University of Hohenheim, Fruwirthstr. 21, 70599 Stuttgart, Germany
| | - Khaoula El Hassouni
- State Plant Breeding Institute, University of Hohenheim, Fruwirthstr. 21, 70599 Stuttgart, Germany
| | - Ute Distler
- Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1, 55131 Mainz, Germany
| | - Detlef Schuppan
- Institute of Translational Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1, 55131 Mainz, Germany.,Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, Massachusetts 02215, United States
| | - C Friedrich H Longin
- State Plant Breeding Institute, University of Hohenheim, Fruwirthstr. 21, 70599 Stuttgart, Germany
| | - Stefan Tenzer
- Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1, 55131 Mainz, Germany
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Al-Majdoub ZM, Couto N, Achour B, Harwood MD, Carlson G, Warhurst G, Barber J, Rostami-Hodjegan A. Quantification of Proteins Involved in Intestinal Epithelial Handling of Xenobiotics. Clin Pharmacol Ther 2020; 109:1136-1146. [PMID: 33113152 PMCID: PMC8048492 DOI: 10.1002/cpt.2097] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 10/10/2020] [Indexed: 12/17/2022]
Abstract
The intestinal epithelium represents a natural barrier against harmful xenobiotics, while facilitating the uptake of nutrients and other substances. Understanding the interaction of chemicals with constituents of the intestinal epithelium and their fate in the body requires quantitative measurement of relevant proteins in in vitro systems and intestinal epithelium. Recent studies have highlighted the mismatch between messenger RNA (mRNA) and protein abundance for several drug‐metabolizing enzymes and transporters in the highly dynamic environment of the intestinal epithelium; mRNA abundances cannot therefore be used as a proxy for protein abundances in the gut, necessitating direct measurements. The objective was to determine the expression of a wide range proteins pertinent to metabolism and disposition of chemicals and nutrients in the intestinal epithelium. Ileum and jejunum biopsy specimens were obtained from 16 patients undergoing gastrointestinal elective surgery. Mucosal fractions were prepared and analyzed using targeted and global proteomic approaches. A total of 29 enzymes, 32 transporters, 6 tight junction proteins, 2 adhesion proteins, 1 alkaline phosphatase, 1 thioredoxin, 5 markers, and 1 regulatory protein were quantified—60 for the first time. The global proteomic method identified a further 5,222 proteins, which are retained as an open database for interested parties to explore. This study significantly expands our knowledge of a wide array of proteins important for xenobiotic handling in the intestinal epithelium. Quantitative systems biology models will benefit from the novel systems data generated in the present study and the translation path offered for in vitro to in vivo translation.
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Affiliation(s)
- Zubida M Al-Majdoub
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, University of Manchester, Manchester, UK
| | - Narciso Couto
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, University of Manchester, Manchester, UK
| | - Brahim Achour
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, University of Manchester, Manchester, UK
| | | | - Gordon Carlson
- Gut Barrier Group, Inflammation and Repair, University of Manchester, Salford Royal NHS Trust, Salford, UK
| | - Geoffrey Warhurst
- Gut Barrier Group, Inflammation and Repair, University of Manchester, Salford Royal NHS Trust, Salford, UK
| | - Jill Barber
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, University of Manchester, Manchester, UK
| | - Amin Rostami-Hodjegan
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, University of Manchester, Manchester, UK.,Certara UK (Simcyp Division), Sheffield, UK
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Nonalcoholic Fatty Liver Disease (NAFLD) and Hepatic Cytochrome P450 (CYP) Enzymes. Pharmaceuticals (Basel) 2020; 13:ph13090222. [PMID: 32872474 PMCID: PMC7560175 DOI: 10.3390/ph13090222] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 08/21/2020] [Indexed: 12/12/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is characterized by excessive fat in the liver. An international consensus panel has recently proposed to rename the disease to metabolic dysfunction associated with fatty liver disease (MAFLD). The disease can range from simple steatosis (fat accumulation) to nonalcoholic steatohepatitis (NASH) which represents a severe form of NAFLD and is accompanied by inflammation, fibrosis, and hepatocyte damage in addition to significant steatosis. This review collates current knowledge of changes in human hepatic cytochrome P450 enzymes in NAFLD. While the expression of these enzymes is well studied in healthy volunteers, our understanding of the alterations of these proteins in NAFLD is limited. Much of the existing knowledge on the subject is derived from preclinical studies, and clinical translation of these findings is poor. Wherever available, the effect of NAFLD on these proteins in humans is debatable and currently lacks a consensus among different reports. Protein expression is an important in vitro physiological parameter controlling the pharmacokinetics of drugs and the last decade has seen a rise in the accurate estimation of these proteins for use with physiologically based pharmacokinetic (PBPK) modeling to predict drug pharmacokinetics in special populations. The application of label-free, mass spectrometry-based quantitative proteomics as a promising tool to study NAFLD-associated changes has also been discussed.
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Achour B, Al-Majdoub ZM, Rostami-Hodjegan A, Barber J. Mass Spectrometry of Human Transporters. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2020; 13:223-247. [PMID: 32084322 DOI: 10.1146/annurev-anchem-091719-024553] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Transporters are key to understanding how an individual will respond to a particular dose of a drug. Two patients with similar systemic concentrations may have quite different local concentrations of a drug at the required site. The transporter profile of any individual depends upon a variety of genetic and environmental factors, including genotype, age, and diet status. Robust models (virtual patients) are therefore required and these models are data hungry. Necessary data include quantitative transporter profiles at the relevant organ. Liquid chromatography with tandem mass spectrometry (LC-MS/MS) is currently the most powerful method available for obtaining this information. Challenges include sourcing the tissue, isolating the hydrophobic membrane-embedded transporter proteins, preparing the samples for MS (including proteolytic digestion), choosing appropriate quantification methodology, and optimizing the LC-MS/MS conditions. Great progress has been made with all of these, especially within the last few years, and is discussed here.
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Affiliation(s)
- Brahim Achour
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, University of Manchester, Manchester M13 9PT, United Kingdom;
| | - Zubida M Al-Majdoub
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, University of Manchester, Manchester M13 9PT, United Kingdom;
| | - Amin Rostami-Hodjegan
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, University of Manchester, Manchester M13 9PT, United Kingdom;
- Certara, Princeton, New Jersey 08540, USA
| | - Jill Barber
- Centre for Applied Pharmacokinetic Research, School of Health Sciences, University of Manchester, Manchester M13 9PT, United Kingdom;
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15
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Kumar S, Bouic PJ, Rosenkranz B. In Vitro Assessment of the Interaction Potential of Ocimum basilicum (L.) Extracts on CYP2B6, 3A4, and Rifampicin Metabolism. Front Pharmacol 2020; 11:517. [PMID: 32425779 PMCID: PMC7204527 DOI: 10.3389/fphar.2020.00517] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 04/01/2020] [Indexed: 12/12/2022] Open
Abstract
Ocimum basilicum L. or basilicum is a common culinary herb, used as a traditional medicine for various medical conditions including HIV/AIDS and tuberculosis, in Africa. The objective of this study was to evaluate the effect of methanol, ethanol, aqueous and ethyl acetate extracts of the dried leaves and inflorescence of O. basilicum, on the activity of cytochrome P450 enzymes (CYPs) CYP2B6 and 3A4, as well as esterase-mediated metabolism of rifampicin to 25-O-desacetyl rifampicin (25ODESRIF). Human liver microsomes (HLM) were used to evaluate inhibition and CYP2B6/3A4 mRNA expression HepG2 assays were used to measure induction. Furthermore, the phytoconstituents likely involved in causing the observed effect were analyzed using biochemical tests and LC-MS. The aqueous and methanolic extracts showed reversible and time-dependent inhibition (TDI) of CYP2B6 with TDI-IC50s 33.35 μg/ml (IC50 shift-fold >1.5) and 4.93 μg/ml (IC50 shift-fold >7) respectively, while the methanolic and ethanolic extracts inhibited 25ODESRIF formation (IC50s 31 μg/ml, 8.94 μg/ml). In HepG2 assays, the methanolic and ethanolic extracts moderately induced CYP2B6, 3A4 mRNA with 38%-, 28%-fold shift, and 22%-, 44%-fold shift respectively. LC-MS full scans identified phenols rosmarinic acid [m/z 359 (M-H)-, approximately 2298 mg/L in aqueous extract] and caftaric acid along with flavones salvigenin [m/z 329 (M+H)+, approximately 1855 mg/L in ethanolic extract], eupatorin [m/z 345 (M+H)+, 668.772 mg/L in ethanolic extract], rutin [m/z 609 (M-H)-] and isoquercetin [m/z 463 (M-H)-] and other compounds—linalool [m/z 153 (M-H)-], hydroxyjasmonic acid [m/z 225 (M-H)-], eucommiol [m/z 187 (M-H)-] and trihydroxy octadecenoic acid [m/z 329 (M-H)-, 530 mg/L in ethanolic extract]. The putative gastrointestinal tract (GIT) concentration for all extracts was calculated as 2,400 μg/ml and hepatic circulation concentrations were estimated at 805.68 μg/ml for the aqueous extract, and 226.56 μg/ml for methanolic extract. Based on the putative GIT concentration, estimated hepatic circulation concentration [I] and inhibition constant Ki, the predicted percentile of inhibition in vivo was highest for the aqueous extract on CYP2B6 (96.7%). The observations indicated that O. basilicum extracts may have the potential to cause clinically relevant herb-drug interactions (HDI) with CYP2B6 and rifampicin metabolism in vivo, if sufficient hepatic concentrations are reached in humans.
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Affiliation(s)
- Saneesh Kumar
- Division of Clinical Pharmacology, Faculty of Medicine and Health Sciences, University of Stellenbosch, Cape Town, South Africa
| | - Patrick J Bouic
- Division of Medical Microbiology, Faculty of Medicine and Health Sciences, University of Stellenbosch, Cape Town, South Africa.,Synexa Life Sciences, Cape Town, South Africa
| | - Bernd Rosenkranz
- Division of Clinical Pharmacology, Faculty of Medicine and Health Sciences, University of Stellenbosch, Cape Town, South Africa.,Fundisa African Academy of Medicines Development, Cape Town, South Africa
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16
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Quantitative mass spectrometry-based proteomics in the era of model-informed drug development: Applications in translational pharmacology and recommendations for best practice. Pharmacol Ther 2019; 203:107397. [DOI: 10.1016/j.pharmthera.2019.107397] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 07/29/2019] [Indexed: 02/08/2023]
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17
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Prasad B, Achour B, Artursson P, Hop CECA, Lai Y, Smith PC, Barber J, Wisniewski JR, Spellman D, Uchida Y, Zientek M, Unadkat JD, Rostami-Hodjegan A. Toward a Consensus on Applying Quantitative Liquid Chromatography-Tandem Mass Spectrometry Proteomics in Translational Pharmacology Research: A White Paper. Clin Pharmacol Ther 2019; 106:525-543. [PMID: 31175671 PMCID: PMC6692196 DOI: 10.1002/cpt.1537] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 05/22/2019] [Indexed: 12/18/2022]
Abstract
Quantitative translation of information on drug absorption, disposition, receptor engagement, and drug-drug interactions from bench to bedside requires models informed by physiological parameters that link in vitro studies to in vivo outcomes. To predict in vivo outcomes, biochemical data from experimental systems are routinely scaled using protein quantity in these systems and relevant tissues. Although several laboratories have generated useful quantitative proteomic data using state-of-the-art mass spectrometry, no harmonized guidelines exit for sample analysis and data integration to in vivo translation practices. To address this gap, a workshop was held on September 27 and 28, 2018, in Cambridge, MA, with 100 experts attending from academia, the pharmaceutical industry, and regulators. Various aspects of quantitative proteomics and its applications in translational pharmacology were debated. A summary of discussions and best practices identified by this expert panel are presented in this "White Paper" alongside unresolved issues that were outlined for future debates.
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Affiliation(s)
- Bhagwat Prasad
- Department of Pharmaceutics, University of Washington, Seattle, WA
| | - Brahim Achour
- Centre for Applied Pharmacokinetic Research, University of Manchester, Manchester, UK
| | - Per Artursson
- Department of Pharmacy, Uppsala University, Uppsala, Sweden
| | | | | | - Philip C Smith
- Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Jill Barber
- Centre for Applied Pharmacokinetic Research, University of Manchester, Manchester, UK
| | - Jacek R Wisniewski
- Biochemical Proteomics Group, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Daniel Spellman
- Pharmacokinetics, Pharmacodynamics & Drug Metabolism, Merck & Co., Inc., West Point, PA
| | - Yasuo Uchida
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Japan
| | | | | | - Amin Rostami-Hodjegan
- Centre for Applied Pharmacokinetic Research, University of Manchester, Manchester, UK
- Certara UK Ltd. (Simcyp Division), 1 Concourse Way, Sheffield, UK
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18
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Montowska M, Fornal E. Absolute quantification of targeted meat and allergenic protein additive peptide markers in meat products. Food Chem 2019; 274:857-864. [PMID: 30373020 DOI: 10.1016/j.foodchem.2018.08.131] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/23/2018] [Accepted: 08/28/2018] [Indexed: 12/11/2022]
Abstract
We present an implementation of the absolute quantification (AQUA) method for monitoring of peptide abundance in complex mixtures of processed proteins. Specific peptide markers from meats (chicken, duck, goose, pork and beef) and common protein allergenic additives (soy, milk and egg white preparations) were chosen and synthesised with stable isotopes (13C and 15N) for use as internal standards. A wide range of food samples, from cooked or raw meat to sterilised pâté, was analysed by a triggered multiple reaction monitoring mode experiment and triple quadrupole mass spectrometry for the direct measure of tryptic peptides representing the amounts of specific proteins. Considerable differences among the abundances of meat and non-meat proteins were observed, and illegal addition and replacement of ingredients were discovered, i.e. undeclared addition of pork and egg white proteins, and illegal substitution of veal, goose and duck meat with cheaper pork.
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Affiliation(s)
- Magdalena Montowska
- Department of Meat Technology, Poznan University of Life Sciences, Wojska Polskiego 31, Poznan 60-624, Poland.
| | - Emilia Fornal
- Department of Pathophysiology, Medical University of Lublin, Jaczewskiego 8b, Lublin 20-090, Poland.
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19
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Relative quantitation of endogenous proteins by quadrupole-time of flight and tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1106-1107:11-18. [PMID: 30615973 DOI: 10.1016/j.jchromb.2018.12.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 11/23/2018] [Accepted: 12/16/2018] [Indexed: 01/17/2023]
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20
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Couto N, Al-Majdoub ZM, Achour B, Wright PC, Rostami-Hodjegan A, Barber J. Quantification of Proteins Involved in Drug Metabolism and Disposition in the Human Liver Using Label-Free Global Proteomics. Mol Pharm 2019; 16:632-647. [DOI: 10.1021/acs.molpharmaceut.8b00941] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Narciso Couto
- Centre for Applied Pharmacokinetic Research, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, U.K
- Department of Chemical and Biological Engineering, ChELSI Institute (Chemical Engineering at the Life Science Interface), University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD, U.K
| | - Zubida M. Al-Majdoub
- Centre for Applied Pharmacokinetic Research, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, U.K
| | - Brahim Achour
- Centre for Applied Pharmacokinetic Research, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, U.K
| | - Phillip C. Wright
- Department of Chemical and Biological Engineering, ChELSI Institute (Chemical Engineering at the Life Science Interface), University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD, U.K
| | - Amin Rostami-Hodjegan
- Centre for Applied Pharmacokinetic Research, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, U.K
- Simcyp Ltd. (a Certara company), 1 Concourse Way, Sheffield S1 2BJ, U.K
| | - Jill Barber
- Centre for Applied Pharmacokinetic Research, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, U.K
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21
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Smith BJ, Martins-de-Souza D, Fioramonte M. A Guide to Mass Spectrometry-Based Quantitative Proteomics. Methods Mol Biol 2019; 1916:3-39. [PMID: 30535679 DOI: 10.1007/978-1-4939-8994-2_1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Proteomics has become an attractive science in the postgenomic era, given its capacity to identify up to thousands of molecules in a single, complex sample and quantify them in an absolute and/or relative manner. The use of these techniques enables understanding of cellular and molecular mechanisms of diseases and other biological conditions, as well as identification and screening of protein biomarkers. Here we provide a straightforward, up-to-date compilation and comparison of the main quantitation techniques used in comparative proteomics such as in vitro and in vivo stable isotope labeling and label-free techniques. Additionally, this chapter includes common methods for data acquisition in proteomics and some appropriate methods for data processing. This compilation can serve as a reference for scientists who are new to, or already familiar with, quantitative proteomics.
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Affiliation(s)
- Bradley J Smith
- Laboratory of Neuroproteomics, Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Daniel Martins-de-Souza
- Laboratory of Neuroproteomics, Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
- Center for Neurobiology, University of Campinas (UNICAMP), Campinas, Brazil
- Instituto Nacional de Biomarcadores em Neuropsiquiatria (INBION), Conselho Nacional de Desenvolvimento Cientifico e Tecnologico, Sao Paulo, Brazil
| | - Mariana Fioramonte
- Laboratory of Neuroproteomics, Department of Biochemistry and Tissue Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil.
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22
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Sun L, Wang C, Zhang Y. A physiologically based pharmacokinetic model for valacyclovir established based on absolute expression quantity of hPEPT1 and its application. Eur J Pharm Sci 2018; 123:560-568. [PMID: 30081070 DOI: 10.1016/j.ejps.2018.07.057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 07/05/2018] [Accepted: 07/30/2018] [Indexed: 10/28/2022]
Abstract
In this study, a physiologically based pharmacokinetic (PBPK) model was established for valacyclovir based on absolute expression quantity of hPEPT1 along the entire length of the human intestine and other reliable in vitro, in vivo observed data. The PBPK model-3 defined acyclovir as metabolite of valacyclovir and simulated the plasma concentration-time profiles of valacyclovir and acyclovir simultaneously. It was validated strictly by a series of observed plasma concentration-time profiles. The average fold error (AFE) and absolute average fold error (AAFE) values were all smaller than 2. Then, it was used to quantitatively evaluate the effect of hPEPT1, luminal degradation rate, drug release rate and gastric residence time on the oral absorption of valacyclovir and acyclovir. The PBPK model-3 suggests that mainly 75% of valacyclovir was absorbed by active transport of hPEPT1. The luminal degradation of valacyclovir in the upper intestinal lumen cannot be considered the only reason for its incomplete bioavailability. The plasma concentration-time profiles of valacyclovir and its metabolite acyclovir were not sensitive to dissolution rate faster than T85% = 120 min. Prolonged gastric residence time of sustained release tablet can improve the oral absorption of valacyclovir. All in all, the PBPK model-3 in this study is reliable and accurate. It is useful for the research of clinical application and dosage forms design of valacyclovir.
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Affiliation(s)
- Le Sun
- Department of Pharmaceutics, School of Pharmacy, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China.
| | - Chao Wang
- Liaoning Institute for Drug Control, No. 7 Chongshan West Road, Huanggu Area, Shenyang 110122, China
| | - Youxi Zhang
- Department of Pharmacy, The Fourth Affiliated Hospital, China Medical University, No. 4 Chongshan East Road, Huanggu Area, Shenyang 110122, China
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23
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Al Feteisi H, Al-Majdoub ZM, Achour B, Couto N, Rostami-Hodjegan A, Barber J. Identification and quantification of blood-brain barrier transporters in isolated rat brain microvessels. J Neurochem 2018; 146:670-685. [PMID: 29675872 DOI: 10.1111/jnc.14446] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/26/2018] [Accepted: 04/05/2018] [Indexed: 12/20/2022]
Abstract
The blood-brain barrier (BBB) maintains brain homeostasis by tightly regulating the exchange of molecules with systemic circulation. It consists primarily of microvascular endothelial cells surrounded by astrocytic endfeet, pericytes, and microglia. Understanding the make-up of transporters in rat BBB is essential to the translation of pharmacological and toxicological observations into humans. In this study, experimental workflows are presented in which the optimization of (a) isolation of rat brain microvessels (b) enrichment of endothelial cells, and (c) extraction and digestion of proteins were evaluated, followed by identification and quantification of BBB proteins. Optimization of microvessel isolation was indicated by 15-fold enrichment of endothelial cell marker Glut1 mRNA, whereas markers for other cell types were not enriched. Filter-aided sample preparation was shown to be superior to in-solution sample preparation (10251 peptides vs. 7533 peptides). Label-free proteomics was used to identify nearly 2000 proteins and quantify 1276 proteins in isolated microvessels. A combination of targeted and global proteomics was adopted to measure protein abundance of 6 ATP-binding cassette and 27 solute carrier transporters. Data analysis using proprietary Progenesis and open access MaxQuant software showed overall agreement; however, Abcb9 and Slc22a8 were quantified only by MaxQuant, whereas Abcc9 and Abcd3 were quantified only by Progenesis. Agreement between targeted and untargeted quantification was demonstrated for Abcb1 (19.7 ± 1.4 vs. 17.8 ± 2.3) and Abcc4 (2.2 ± 0.7 vs. 2.1 ± 0.4), respectively. Rigorous quantification of BBB proteins, as reported in this study, should assist with translational modeling efforts involving brain disposition of xenobiotics.
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Affiliation(s)
- Hajar Al Feteisi
- Centre for Applied Pharmacokinetic Research (CAPKR), University of Manchester, Manchester, UK
| | - Zubida M Al-Majdoub
- Centre for Applied Pharmacokinetic Research (CAPKR), University of Manchester, Manchester, UK
| | - Brahim Achour
- Centre for Applied Pharmacokinetic Research (CAPKR), University of Manchester, Manchester, UK
| | - Narciso Couto
- ChELSI Institute, Department of Chemical and Biological Engineering, University of Sheffield, Sheffield, UK
| | - Amin Rostami-Hodjegan
- Centre for Applied Pharmacokinetic Research (CAPKR), University of Manchester, Manchester, UK.,Simcyp Limited (a Certara Company), Sheffield, UK
| | - Jill Barber
- Centre for Applied Pharmacokinetic Research (CAPKR), University of Manchester, Manchester, UK
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24
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Wilson RS, Thelen JJ. In Vivo Quantitative Monitoring of Subunit Stoichiometry for Metabolic Complexes. J Proteome Res 2018; 17:1773-1783. [PMID: 29582652 DOI: 10.1021/acs.jproteome.7b00756] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Metabolic pathways often employ assemblies of individual enzymes to facilitate substrate channeling to improve thermodynamic efficiency and confer pathway directionality. It is often assumed that subunits to multienzyme complexes are coregulated and accumulate at fixed levels in vivo, reflecting complex stoichiometry. Such assumptions can be experimentally tested using modern tandem mass spectrometry, and herein we describe such an approach applied toward an important metabolic complex. The committed step of de novo fatty acid synthesis in the plastids of most plants is catalyzed by the multienzyme, heteromeric acetyl-CoA carboxylase (hetACCase). This complex is composed of four catalytic subunits and a recently discovered regulatory subunit resembling the biotin carboxyl carrier protein but lacking the biotinylation motif necessary for activity. To better understand this novel form of regulation, a targeted tandem mass-spectrometry-based assay was developed to absolutely quantify all subunits to the Arabidopsis thaliana hetACCase. After validation against pure, recombinant protein, this multiplexed assay was used to quantify hetACCase subunits in siliques in various stages of development. Quantitation provided a developmental profile of hetACCase and BADC protein expression that supports a recently proposed regulatory mechanism for hetACCase and demonstrates a promising application of targeted mass spectrometry for in vivo analysis of protein complexes.
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Affiliation(s)
- Rashaun S Wilson
- Department of Biochemistry , University of Missouri, Christopher S. Bond Life Sciences Center , Columbia , Missouri 65211 , United States
| | - Jay J Thelen
- Department of Biochemistry , University of Missouri, Christopher S. Bond Life Sciences Center , Columbia , Missouri 65211 , United States
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25
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Achour B, Dantonio A, Niosi M, Novak JJ, Al-Majdoub ZM, Goosen TC, Rostami-Hodjegan A, Barber J. Data Generated by Quantitative Liquid Chromatography-Mass Spectrometry Proteomics Are Only the Start and Not the Endpoint: Optimization of Quantitative Concatemer-Based Measurement of Hepatic Uridine-5′-Diphosphate–Glucuronosyltransferase Enzymes with Reference to Catalytic Activity. Drug Metab Dispos 2018; 46:805-812. [DOI: 10.1124/dmd.117.079475] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 03/22/2018] [Indexed: 12/17/2022] Open
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26
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Achour B, Dantonio A, Niosi M, Novak JJ, Fallon JK, Barber J, Smith PC, Rostami-Hodjegan A, Goosen TC. Quantitative Characterization of Major Hepatic UDP-Glucuronosyltransferase Enzymes in Human Liver Microsomes: Comparison of Two Proteomic Methods and Correlation with Catalytic Activity. Drug Metab Dispos 2017; 45:1102-1112. [PMID: 28768682 DOI: 10.1124/dmd.117.076703] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 07/31/2017] [Indexed: 08/10/2024] Open
Abstract
Quantitative characterization of UDP-glucuronosyltransferase (UGT) enzymes is valuable in glucuronidation reaction phenotyping, predicting metabolic clearance and drug-drug interactions using extrapolation exercises based on pharmacokinetic modeling. Different quantitative proteomic workflows have been employed to quantify UGT enzymes in various systems, with reports indicating large variability in expression, which cannot be explained by interindividual variability alone. To evaluate the effect of methodological differences on end-point UGT abundance quantification, eight UGT enzymes were quantified in 24 matched liver microsomal samples by two laboratories using stable isotope-labeled (SIL) peptides or quantitative concatemer (QconCAT) standard, and measurements were assessed against catalytic activity in seven enzymes (n = 59). There was little agreement between individual abundance levels reported by the two methods; only UGT1A1 showed strong correlation [Spearman rank order correlation (Rs) = 0.73, P < 0.0001; R2 = 0.30; n = 24]. SIL-based abundance measurements correlated well with enzyme activities, with correlations ranging from moderate for UGTs 1A6, 1A9, and 2B15 (Rs = 0.52-0.59, P < 0.0001; R2 = 0.34-0.58; n = 59) to strong correlations for UGTs 1A1, 1A3, 1A4, and 2B7 (Rs = 0.79-0.90, P < 0.0001; R2 = 0.69-0.79). QconCAT-based data revealed generally poor correlation with activity, whereas moderate correlations were shown for UGTs 1A1, 1A3, and 2B7. Spurious abundance-activity correlations were identified in the cases of UGT1A4/2B4 and UGT2B7/2B15, which could be explained by correlations of protein expression between these enzymes. Consistent correlation of UGT abundance with catalytic activity, demonstrated by the SIL-based dataset, suggests that quantitative proteomic data should be validated against catalytic activity whenever possible. In addition, metabolic reaction phenotyping exercises should consider spurious abundance-activity correlations to avoid misleading conclusions.
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Affiliation(s)
- Brahim Achour
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, University of Manchester, Manchester, United Kingdom (B.A., J.B., A.R.-H.); Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.F., P.C.S.); Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut (A.D., M.N., J.J.N., T.C.G.); and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield, United Kingdom (A.R.-H.)
| | - Alyssa Dantonio
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, University of Manchester, Manchester, United Kingdom (B.A., J.B., A.R.-H.); Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.F., P.C.S.); Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut (A.D., M.N., J.J.N., T.C.G.); and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield, United Kingdom (A.R.-H.)
| | - Mark Niosi
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, University of Manchester, Manchester, United Kingdom (B.A., J.B., A.R.-H.); Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.F., P.C.S.); Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut (A.D., M.N., J.J.N., T.C.G.); and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield, United Kingdom (A.R.-H.)
| | - Jonathan J Novak
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, University of Manchester, Manchester, United Kingdom (B.A., J.B., A.R.-H.); Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.F., P.C.S.); Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut (A.D., M.N., J.J.N., T.C.G.); and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield, United Kingdom (A.R.-H.)
| | - John K Fallon
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, University of Manchester, Manchester, United Kingdom (B.A., J.B., A.R.-H.); Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.F., P.C.S.); Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut (A.D., M.N., J.J.N., T.C.G.); and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield, United Kingdom (A.R.-H.)
| | - Jill Barber
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, University of Manchester, Manchester, United Kingdom (B.A., J.B., A.R.-H.); Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.F., P.C.S.); Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut (A.D., M.N., J.J.N., T.C.G.); and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield, United Kingdom (A.R.-H.)
| | - Philip C Smith
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, University of Manchester, Manchester, United Kingdom (B.A., J.B., A.R.-H.); Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.F., P.C.S.); Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut (A.D., M.N., J.J.N., T.C.G.); and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield, United Kingdom (A.R.-H.)
| | - Amin Rostami-Hodjegan
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, University of Manchester, Manchester, United Kingdom (B.A., J.B., A.R.-H.); Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.F., P.C.S.); Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut (A.D., M.N., J.J.N., T.C.G.); and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield, United Kingdom (A.R.-H.)
| | - Theunis C Goosen
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, University of Manchester, Manchester, United Kingdom (B.A., J.B., A.R.-H.); Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina (J.K.F., P.C.S.); Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Groton, Connecticut (A.D., M.N., J.J.N., T.C.G.); and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield, United Kingdom (A.R.-H.)
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Achour B, Al Feteisi H, Lanucara F, Rostami-Hodjegan A, Barber J. Global Proteomic Analysis of Human Liver Microsomes: Rapid Characterization and Quantification of Hepatic Drug-Metabolizing Enzymes. Drug Metab Dispos 2017; 45:666-675. [PMID: 28373266 DOI: 10.1124/dmd.116.074732] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 03/30/2017] [Indexed: 12/17/2022] Open
Abstract
Many genetic and environmental factors lead to interindividual variations in the metabolism and transport of drugs, profoundly affecting efficacy and toxicity. Precision dosing, that is, targeting drug dose to a well characterized subpopulation, is dependent on quantitative models of the profiles of drug-metabolizing enzymes (DMEs) and transporters within that subpopulation, informed by quantitative proteomics. We report the first use of ion mobility-mass spectrometry for this purpose, allowing rapid, robust, label-free quantification of human liver microsomal (HLM) proteins from distinct individuals. Approximately 1000 proteins were identified and quantified in four samples, including an average of 70 DMEs. Technical and biological variabilities were distinguishable, with technical variability accounting for about 10% of total variability. The biological variation between patients was clearly identified, with samples showing a range of expression profiles for cytochrome P450 and uridine 5'-diphosphoglucuronosyltransferase enzymes. Our results showed excellent agreement with previous data from targeted methods. The label-free method, however, allowed a fuller characterization of the in vitro system, showing, for the first time, that HLMs are significantly heterogeneous. Further, the traditional units of measurement of DMEs (pmol mg-1 HLM protein) are shown to introduce error arising from variability in unrelated, highly abundant proteins. Simulations of this variability suggest that up to 1.7-fold variation in apparent CYP3A4 abundance is artifactual, as are background positive correlations of up to 0.2 (Spearman correlation coefficient) between the abundances of DMEs. We suggest that protein concentrations used in pharmacokinetic predictions and scaling to in vivo clinical situations (physiologically based pharmacokinetics and in vitro-in vivo extrapolation) should be referenced instead to tissue mass.
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Affiliation(s)
- Brahim Achour
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, School of Health Sciences, University of Manchester, Manchester (B.A., H.A.F., A.R.-H., J.B.), Waters Corporation, Wilmslow, Cheshire East (F.L.), and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield (A.R.-H.), United Kingdom
| | - Hajar Al Feteisi
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, School of Health Sciences, University of Manchester, Manchester (B.A., H.A.F., A.R.-H., J.B.), Waters Corporation, Wilmslow, Cheshire East (F.L.), and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield (A.R.-H.), United Kingdom
| | - Francesco Lanucara
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, School of Health Sciences, University of Manchester, Manchester (B.A., H.A.F., A.R.-H., J.B.), Waters Corporation, Wilmslow, Cheshire East (F.L.), and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield (A.R.-H.), United Kingdom
| | - Amin Rostami-Hodjegan
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, School of Health Sciences, University of Manchester, Manchester (B.A., H.A.F., A.R.-H., J.B.), Waters Corporation, Wilmslow, Cheshire East (F.L.), and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield (A.R.-H.), United Kingdom
| | - Jill Barber
- Centre for Applied Pharmacokinetic Research, Division of Pharmacy and Optometry, School of Health Sciences, University of Manchester, Manchester (B.A., H.A.F., A.R.-H., J.B.), Waters Corporation, Wilmslow, Cheshire East (F.L.), and Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield (A.R.-H.), United Kingdom
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28
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Zhang HF, Wang HH, Gao N, Wei JY, Tian X, Zhao Y, Fang Y, Zhou J, Wen Q, Gao J, Zhang YJ, Qian XH, Qiao HL. Physiological Content and Intrinsic Activities of 10 Cytochrome P450 Isoforms in Human Normal Liver Microsomes. J Pharmacol Exp Ther 2016; 358:83-93. [PMID: 27189963 DOI: 10.1124/jpet.116.233635] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 04/25/2016] [Indexed: 11/22/2022] Open
Abstract
Due to a lack of physiologic cytochrome P450 (P450) isoform content, P450 activity is typically only determined at the microsomal level (per milligram of microsomal protein) and not at the isoform level (per picomole of P450 isoform), which could result in the misunderstanding of variations in P450 activity between individuals and further hinder development of personalized medicine. We found that there were large variations in protein content, mRNA levels, and intrinsic activities of the 10 P450s in 100 human liver samples, in which CYP2E1 and CYP2C9 showed the highest expression levels. P450 gene polymorphisms had different effects on activity at two levels: CYP3A5*3 and CYP2A6*9 alleles conferred increased activity at the isoform level but decreased activity at the microsomal level; CYP2C9*3 had no effect at the isoform level but decreased activity at the microsomal level. The different effects at each level stem from the different effects of each polymorphism on the resulting P450 protein. Individuals with CYP2A6*1/*4, CYP2A6*1/*9, CYP2C9*1/*3, CYP2D6 100C>T TT, CYP2E1 7632T>A AA, CYP3A5*1*3, and CYP3A5*3*3 genotypes had significantly lower protein content, whereas CYP2D6 1661G>C mutants had a higher protein content. In conclusion, we first offered the physiologic data of 10 P450 isoform contents and found that some single nucleotide polymorphisms had obvious effects on P450 expression in human normal livers. The effects of gene polymorphisms on intrinsic P450 activity at the isoform level were quite different from those at the microsomal level, which might be due to changes in P450 protein content.
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Affiliation(s)
- Hai-Feng Zhang
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Huan-Huan Wang
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Na Gao
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Jun-Ying Wei
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Xin Tian
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Yan Zhao
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Yan Fang
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Jun Zhou
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Qiang Wen
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Jie Gao
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Yang-Jun Zhang
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Xiao-Hong Qian
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
| | - Hai-Ling Qiao
- Institute of Clinical Pharmacology, Zhengzhou University, Zhengzhou, Henan, China (H.-F.Z., N.G., X.T., Y.F., J.Z., Q.W., J.G., H.-L.Q.); and State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing, China (H.-H.W., J.-Y.W., Y.-J.Z., Y.Z, X.-H.Q.)
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29
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Wang X, Liang Y, Liu L, Shi J, Zhu HJ. Targeted absolute quantitative proteomics with SILAC internal standards and unlabeled full-length protein calibrators (TAQSI). RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:553-61. [PMID: 26842578 PMCID: PMC6301059 DOI: 10.1002/rcm.7482] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 12/13/2015] [Accepted: 12/13/2015] [Indexed: 05/25/2023]
Abstract
RATIONALE Liquid Chromatography/Mass Spectrometry (LC/MS)-based proteomics for absolute protein quantification has been increasingly utilized in both basic and clinical research. There is a great need to overcome some major hurdles of current absolute protein quantification methods, such as significant inter-assay variability and the high cost associated with the preparation of purified stable-isotope-labeled peptide/protein standards. METHODS We developed a novel targeted absolute protein quantification method, named TAQSI, utilizing full-length isotope-labeled protein internal standards generated from SILAC (stable isotope labeling by amino acid in cell culture) and unlabeled full-length protein calibrators. This approach was applied to absolute quantification of carboxylesterase 1 (CES1), the primary human hepatic hydrolase, in a large set of human liver samples. Absolute CES1 quantities were derived from the standard calibration curves established from unlabeled CES1 protein calibrators and the isotope-labeled CES1 internal standards obtained from SILAC HepG2 cells. RESULTS The TAQSI assay was found to be accurate, precise, reproducible, and cost-effective. Importantly, protein quantification was not affected by various protein extraction and digestion protocols, and measurement errors associated with nonsynonymous variants can be readily identified and avoided. Furthermore, the TAQSI approach significantly simplifies the procedure of identifying the best performance surrogate peptides. CONCLUSIONS The TAQSI assay can be widely used for targeted absolute protein quantification in various biomedical research and clinical practice settings.
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Affiliation(s)
- Xinwen Wang
- Department of Clinical Pharmacy, University of Michigan, Ann Arbor, Michigan
| | - Yan Liang
- Department of Clinical Pharmacy, University of Michigan, Ann Arbor, Michigan
- The Key Laboratory of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China
| | - Li Liu
- Department of Clinical Pharmacy, University of Michigan, Ann Arbor, Michigan
- The Key Laboratory of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing, China
| | - Jian Shi
- Department of Clinical Pharmacy, University of Michigan, Ann Arbor, Michigan
| | - Hao-Jie Zhu
- Department of Clinical Pharmacy, University of Michigan, Ann Arbor, Michigan
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30
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Al Feteisi H, Achour B, Rostami-Hodjegan A, Barber J. Translational value of liquid chromatography coupled with tandem mass spectrometry-based quantitative proteomics forin vitro–in vivoextrapolation of drug metabolism and transport and considerations in selecting appropriate techniques. Expert Opin Drug Metab Toxicol 2015; 11:1357-69. [DOI: 10.1517/17425255.2015.1055245] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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31
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Harwood MD, Achour B, Russell MR, Carlson GL, Warhurst G, Rostami-Hodjegan A. Application of an LC-MS/MS method for the simultaneous quantification of human intestinal transporter proteins absolute abundance using a QconCAT technique. J Pharm Biomed Anal 2015; 110:27-33. [PMID: 25796981 DOI: 10.1016/j.jpba.2015.02.043] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 02/19/2015] [Accepted: 02/20/2015] [Indexed: 02/02/2023]
Abstract
Transporter proteins expressed in the gastrointestinal tract play a major role in the oral absorption of some drugs, and their involvement may lead to drug-drug interaction (DDI) susceptibility when given in combination with drugs known to inhibit gut wall transporters. Anticipating such liabilities and predicting the magnitude of the impact of transporter proteins on oral drug absorption and DDIs requires quantification of their expression in human intestine, and linking these to data obtained through in vitro experiments. A quantitative targeted absolute proteomic method employing liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) together with a quantitative concatenation (QconCAT) strategy to provide proteotypic peptide standards has been applied to quantify ATP1A1 (sodium/potassium-ATPase; Na/K-ATPase), CDH17 (human peptide transporter 1; HPT1), ABCB1 (P-glycoprotein; P-gp), ABCG2 (breast cancer resistance protein; BCRP), ABCC2 (multidrug resistance-associated protein 2; MRP2) and SLC51A (Organic Solute Transporter subunit alpha; OST-α), in human distal jejunum (n=3) and distal ileum (n=1) enterocyte membranes. Previously developed selected reaction monitoring (SRM) schedules were optimised to enable quantification of the proteotypic peptides for each transporter. After harvesting enterocytes by calcium chelation elution and generating a total membrane fraction, the proteins were subjected to proteolytic digestion. To account for losses of peptides during the digestion procedure, a gravimetric method is also presented. The linearity of quantifying the QconCAT from an internal standard (correlation coefficient, R(2)=0.998) and quantification of all target peptides in a pooled intestinal quality control sample (R(2)≥ 0.980) was established. The assay was also assessed for within and between-day precision, demonstrating a <15% coefficient of variation for all peptides across 3 separate analytical runs, over 2 days. The methods were applied to obtain the absolute abundances for all targeted proteins. In all samples, Na/K-ATPase, HPT1, P-gp and BCRP were detected above the lower limit of quantitation (i.e., >0.2 fmol/μg membrane protein). MRP2 abundance could be quantified in distal jejunum but not in the distal ileum sample. OST-α was not detected in 2 out of 3 jejunum samples. This study highlights the utility of a QconCAT strategy to quantify absolute transporter abundances in human intestinal tissues.
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Affiliation(s)
- M D Harwood
- Gut Barrier Group, Inflammation & Repair, University of Manchester, Salford Royal NHS Trust, Salford M6 8HD, UK; Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield S2 4SU, UK.
| | - B Achour
- Centre for Applied Pharmacokinetic Research, Manchester Pharmacy School, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
| | - M R Russell
- Centre for Applied Pharmacokinetic Research, Manchester Pharmacy School, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
| | - G L Carlson
- Gut Barrier Group, Inflammation & Repair, University of Manchester, Salford Royal NHS Trust, Salford M6 8HD, UK
| | - G Warhurst
- Gut Barrier Group, Inflammation & Repair, University of Manchester, Salford Royal NHS Trust, Salford M6 8HD, UK
| | - A Rostami-Hodjegan
- Simcyp Limited (a Certara Company), Blades Enterprise Centre, Sheffield S2 4SU, UK; Centre for Applied Pharmacokinetic Research, Manchester Pharmacy School, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
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