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Liu H, Guo S, Xi S. A high-resolution accurate mass approach to identification of graveoline metabolites using ultra-high-performance liquid chromatography combined with a photo diode array detector and quadrupole/time-of-flight tandem mass spectrometry. Biomed Chromatogr 2023; 37:e5511. [PMID: 36100977 DOI: 10.1002/bmc.5511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/08/2022] [Accepted: 09/11/2022] [Indexed: 12/15/2022]
Abstract
Graveoline is a biologically active ingredient extracted from Ruta graveolens. Current work aimed at investigating in vitro metabolism of graveoline using rat or human liver microsomes and hepatocytes. Graveoline (20 μM) was incubated with nicotinamide adenine dinucleotide phosphate-supplemented rat and human liver microsomes as well as hepatocytes. LC coupled to a photo diode array detector and quadrupole/time-of-flight tandem mass spectrometry was used to detect and identify the metabolites. The structures of the metabolites were identified by accurate mass, elemental composition, and indicative fragment ions. A total of 12 metabolites, comprising 6 phase I and 6 phase II metabolites, were obtained. The metabolic pathways included demethylenation, demethylation, hydroxylation, glucuronidation, and glutathion conjugation. The metabolite (M10) produced by opening the ring of the methylenedioxyphenyl moiety was detected as the most abundant in both liver microsomes and hepatocytes, mainly catalyzed by CYP1A2, 2C8, 2C9, 2C19, 2D6, 3A4, and 3A5. This study provides valuable information on the in vitro metabolism of graveoline, which is indispensable for further development and safety evaluation of this compound.
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Affiliation(s)
- Hao Liu
- Department of Physical Education, Taiyuan Institute of Technology, Taiyuan, China
| | - Siyuan Guo
- Department of Physical Education, Taiyuan Institute of Technology, Taiyuan, China
| | - Shuyi Xi
- Department of Physical Education, Taiyuan Institute of Technology, Taiyuan, China
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2
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Weston DJ, Dave M, Colizza K, Thomas S, Tomlinson L, Gregory R, Beaumont C, Pirhalla J, Dear GJ. A Discovery Biotransformation Strategy: Combining In Silico Tools with High-Resolution Mass Spectrometry and Software-Assisted Data Analysis for High-Throughput Metabolism. Xenobiotica 2022; 52:928-942. [PMID: 36227740 DOI: 10.1080/00498254.2022.2136042] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Understanding compound metabolism in early drug discovery aids medicinal chemistry in designing molecules with improved safety and ADME properties. While advancements in metabolite prediction brings increasedconfidence, structural decisions require experimental data. In vitro metabolism studies using liquid chromatography and high-resolution mass spectrometry (LC-MS) are generally resource intensive and performed on very few compounds, limiting the chemical space that can be examined.Here, we describe a novel metabolism strategy increasing compound throughput using residual in vitro clearance samples conducted at drug concentrations of 0.5 µM. Analysis by robust UHPLC separation and accurate-mass MS detection ensures major metabolites are identified from a single injection. In silico prediction (parent cLogD) tailors chromatographic conditions, with data-dependent MS/MS targeting predicted metabolites. Software-assisted data mining, structure elucidation and automatic reporting are used.Confidence in the globally-aligned workflow is demonstrated with sixteen marketed drugs. The approach is now implemented routinely across our laboratories. To date, the success rate for identification of at least one major metabolite is 85%. The utility of these data has been demonstrated across multiple projects, allowing earlier medicinal chemistry decisions to increase efficiency and impact of the design-make-test cycle; thus improving the translatability of early in vitro metabolism data.
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Affiliation(s)
- Daniel J Weston
- GSK, DMPK, Disposition and Biotransformation, Gunnels Wood Road, Stevenage, SG1 2NY, UK
| | - Mehul Dave
- GSK, DMPK, Disposition and Biotransformation, Gunnels Wood Road, Stevenage, SG1 2NY, UK
| | - Kevin Colizza
- GSK, DMPK, Disposition and Biotransformation, 1250 S. Collegeville Road., Collegeville, PA 19426, USA
| | - Steve Thomas
- GSK, DMPK, Disposition and Biotransformation, Gunnels Wood Road, Stevenage, SG1 2NY, UK
| | - Laura Tomlinson
- GSK, DMPK, Discovery DMPK, Gunnels Wood Road, Stevenage, SG1 2NY, UK
| | - Richard Gregory
- GSK, DMPK, Discovery DMPK, Gunnels Wood Road, Stevenage, SG1 2NY, UK
| | - Claire Beaumont
- GSK, DMPK, Disposition and Biotransformation, Gunnels Wood Road, Stevenage, SG1 2NY, UK
| | - Jill Pirhalla
- GSK, DMPK, Disposition and Biotransformation, 1250 S. Collegeville Road., Collegeville, PA 19426, USA
| | - Gordon J Dear
- GSK, DMPK, Disposition and Biotransformation, Gunnels Wood Road, Stevenage, SG1 2NY, UK
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He D, Liao F, Wang P, Gan B, Yu L. Rapid separation and identification of 96 main constituents in Huanglian Jiedu decoction via ultra-high performance liquid chromatography-Orbitrap Fusion Tribrid mass spectrometer. JOURNAL OF MASS SPECTROMETRY : JMS 2022; 57:e4888. [PMID: 36241360 DOI: 10.1002/jms.4888] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/08/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
Huanglian Jiedu decoction is a widely used traditional Chinese medicine with a broad spectrum of therapeutic effects, including heat clearing, detoxification, and attenuation of inflammation. However, the composition of Huanglian Jiedu decoction is still unclear due to its complexity and limitations of analytical methods. In this study, we established a fast and reliable analytical method based on ultra-performance LC-Orbitrap Fusion Tribrid mass spectrometer for high-speed separation and structural identification of multiple compounds in Huanglian Jiedu decoction. The analysis was carried out using a Hypersil GOLD C18 column (2.1 × 100 mm, 1.9 μm) with gradient elution coupled to a high-definition mass spectrometer system operating in both positive and negative ESI modes. According to the chromatographic retention time, precise molecular weight, fragment ion peaks, and published data, the main chromatographic peaks were attributed to specific molecules whose chemical structures were determined. In total, 96 components were identified, including 34 flavonoids and their glycosides, 23 alkaloids, 18 organic acids, 13 terpenoids, and 8 miscellaneous compounds. This study revealed the detailed chemical composition of Huanglian Jiedu decoction, which is of great importance for quality control and further pharmacological and mechanistic studies.
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Affiliation(s)
- Dongmei He
- The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Fengyun Liao
- The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Peng Wang
- The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Bing Gan
- The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Lingling Yu
- The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, China
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Esposito S, Orsatti L, Pucci V. Subcutaneous Catabolism of Peptide Therapeutics: Bioanalytical Approaches and ADME Considerations. Xenobiotica 2022; 52:828-839. [PMID: 36039395 DOI: 10.1080/00498254.2022.2119180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Many peptide drugs such as insulin and glucagon-like peptide (GLP-1) analogues are successfully administered subcutaneously (SC). Following SC injection, peptides may undergo catabolism in the SC compartment before entering systemic circulation, which could compromise their bioavailability and in turn affect their efficacy.This review will discuss how both technology and strategy have evolved over the past years to further elucidate peptide SC catabolism.Modern bioanalytical technologies (particularly liquid chromatography-high-resolution mass spectrometry) and bioinformatics platforms for data mining has prompted the development of in silico, in vitro and in vivo tools for characterizing peptide SC catabolism to rapidly address proteolytic liabilities and, ultimately, guide the design of peptides with improved SC bioavailability.More predictive models able to recapitulate the interplay between SC catabolism and other factors driving SC absorption are highly desirable to improve in vitro/in vivo correlations.We envision the routine incorporation of in vitro and in vivo SC catabolism studies in ADME screening funnels to develop more effective peptide drugs for SC delivery.
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Wu X, Sun S, Wu X, Sun Z. Identification of the metabolites of methylophiopogonanone A by ultra-high-performance liquid chromatography combined with high-resolution mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2022; 36:e9304. [PMID: 35347765 DOI: 10.1002/rcm.9304] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/21/2022] [Accepted: 03/26/2022] [Indexed: 06/14/2023]
Abstract
RATIONALE Methylophiopogonanone A (MOA) is a naturally occurring homoisoflavonoid from the Chinese herb Ophiopogon japonicus, which has been demonstrated to attenuate myocardial apoptosis. However, the metabolism of MOA remains unknown. The goal of the present work was to investigate the in vitro metabolism of MOA using liver microsomes and hepatocytes. METHODS The metabolites were generated by incubating MOA with rat, monkey and human liver microsomes or hepatocytes. The resulting samples were analyzed by using a quadrupole-orbitrap high-resolution mass spectrometer. The metabolites were identified through the measurements of the exact mass, elemental composition and product ions. RESULTS A total of 15 metabolites were detected and identified. Among these metabolites, M7 (demethylenation) was the most abundant metabolite in liver microsomes, while M6 (hydroxylation) was the predominant metabolite in hepatocytes, and glucuronidation metabolites (M9 and M10) were also the main metabolites in hepatocytes. The metabolic pathways of MOA included hydroxylation, demethylenation, glucuronidation, methylation, sulfation and glutathione conjugation. CONCLUSIONS This study for the first time provides valuable data on the metabolites of MOA, which will be of great importance for a better understanding of its disposition and to predict human pharmacokinetics.
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Affiliation(s)
- Xiaowen Wu
- Department of Pharmacy, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu Province, China
| | - Shuai Sun
- Department of Pharmacy, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu Province, China
| | - Xiaoyi Wu
- Department of Pharmacy, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu Province, China
| | - Zengxian Sun
- Department of Pharmacy, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu Province, China
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Tian T, Zhou BW, Wu LH, Zhang F, Chou GX, Feng CG, Lin GQ. Non-targeted screening of pyranosides in Rhodiola crenulata using an all ion fragmentation-exact neutral loss strategy combined with liquid chromatography-quadrupole time-of-flight mass spectrometry. PHYTOCHEMICAL ANALYSIS : PCA 2021; 32:1039-1050. [PMID: 33779008 DOI: 10.1002/pca.3045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 02/08/2021] [Accepted: 03/03/2021] [Indexed: 06/12/2023]
Abstract
INTRODUCTION Pyranosides as one kind of natural glycosides contain a pyran ring linked to an aglycone in the structure. They occur widely in plants and possess diverse biological activities. The discovery of new pyranosides not only contributes to research on natural products but also may promote pharmaceutical development. OBJECTIVES A non-targeted liquid chromatography-quadrupole time-of-flight mass spectrometry method coupled with an all ion fragmentation-exact neutral loss (AIF-ENL) strategy was developed for the screening of pyranosides in plants. METHODS Pyranosides in various types were collected as a model. The AIF-ENL strategy comprised three steps: AIF spectrum acquisition and generation, ENL-based searching and identification, and confirmation of structural type using target second-stage mass spectrometry (MS/MS). The strategy was systematically evaluated based on the matrix effects, fragmentation stability, scan rate and screening efficiency and finally applied to Rhodiola crenulata (Hook. f. et Thoms) H. Ohba. RESULTS The method was proved to be an efficient tool for the screening of pyranosides. When it was applied to R. crenulata, a total of 24 pyranoside candidates were detected. Among them, six were tentatively identified on the basis of the agreement of their elemental composition with the reported. The other 18 were detected in R. crenulata for the first time. CONCLUSION The method offers a new platform for discovering pyranosides. In addition, the developed non-targeted strategy can also be used for other natural products, such as flavonoids and coumarins, as long as there is a common fragmentation behaviour in their MS/MS to generate characteristic neutral losses or fragments.
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Affiliation(s)
- Tian Tian
- The Research Centre of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Bo-Wen Zhou
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Li-Hong Wu
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Fang Zhang
- The Research Centre of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Gui-Xin Chou
- Institute of Chinese Materia Medica, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chen-Guo Feng
- The Research Centre of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Guo-Qiang Lin
- The Research Centre of Chiral Drugs, Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
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McCoull W, Boyd S, Brown MR, Coen M, Collingwood O, Davies NL, Doherty A, Fairley G, Goldberg K, Hardaker E, He G, Hennessy EJ, Hopcroft P, Hodgson G, Jackson A, Jiang X, Karmokar A, Lainé AL, Lindsay N, Mao Y, Markandu R, McMurray L, McLean N, Mooney L, Musgrove H, Nissink JWM, Pflug A, Reddy VP, Rawlins PB, Rivers E, Schimpl M, Smith GF, Tentarelli S, Travers J, Troup RI, Walton J, Wang C, Wilkinson S, Williamson B, Winter-Holt J, Yang D, Zheng Y, Zhu Q, Smith PD. Optimization of an Imidazo[1,2- a]pyridine Series to Afford Highly Selective Type I1/2 Dual Mer/Axl Kinase Inhibitors with In Vivo Efficacy. J Med Chem 2021; 64:13524-13539. [PMID: 34478292 DOI: 10.1021/acs.jmedchem.1c00920] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Inhibition of Mer and Axl kinases has been implicated as a potential way to improve the efficacy of current immuno-oncology therapeutics by restoring the innate immune response in the tumor microenvironment. Highly selective dual Mer/Axl kinase inhibitors are required to validate this hypothesis. Starting from hits from a DNA-encoded library screen, we optimized an imidazo[1,2-a]pyridine series using structure-based compound design to improve potency and reduce lipophilicity, resulting in a highly selective in vivo probe compound 32. We demonstrated dose-dependent in vivo efficacy and target engagement in Mer- and Axl-dependent efficacy models using two structurally differentiated and selective dual Mer/Axl inhibitors. Additionally, in vivo efficacy was observed in a preclinical MC38 immuno-oncology model in combination with anti-PD1 antibodies and ionizing radiation.
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Affiliation(s)
| | - Scott Boyd
- Oncology R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | - Martin R Brown
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | - Muireann Coen
- Clinical Pharmacology & Safety Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | | | | | - Ann Doherty
- Clinical Pharmacology & Safety Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | - Gary Fairley
- Oncology R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | | | | | - Guang He
- Pharmaron Beijing Co., Ltd., 6 Taihe Road BDA, Beijing 100176, P. R. China
| | - Edward J Hennessy
- Oncology R&D, AstraZeneca, Gatehouse Park, Waltham, Massachusetts 02451, United States
| | - Philip Hopcroft
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | - George Hodgson
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | - Anne Jackson
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | - Xiefeng Jiang
- Pharmaron Beijing Co., Ltd., 6 Taihe Road BDA, Beijing 100176, P. R. China
| | - Ankur Karmokar
- Oncology R&D, AstraZeneca, Mereside, Alderley Park, Macclesfield SK10 4TG, U.K
| | - Anne-Laure Lainé
- Pharmaceutical Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | | | - Yumeng Mao
- Oncology R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | | | | | | | - Lorraine Mooney
- Oncology R&D, AstraZeneca, Mereside, Alderley Park, Macclesfield SK10 4TG, U.K
| | - Helen Musgrove
- Oncology R&D, AstraZeneca, Mereside, Alderley Park, Macclesfield SK10 4TG, U.K
| | | | - Alexander Pflug
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | - Venkatesh Pilla Reddy
- Clinical Pharmacology & Safety Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | | | - Emma Rivers
- Discovery Sciences, R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | | | - Graham F Smith
- Clinical Pharmacology & Safety Sciences, BioPharmaceuticals R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | - Sharon Tentarelli
- Oncology R&D, AstraZeneca, Gatehouse Park, Waltham, Massachusetts 02451, United States
| | - Jon Travers
- Oncology R&D, AstraZeneca, Cambridge CB4 0WG, U.K
| | | | | | - Cheng Wang
- Pharmaron Beijing Co., Ltd., 6 Taihe Road BDA, Beijing 100176, P. R. China
| | | | | | | | - Dejian Yang
- Pharmaron Beijing Co., Ltd., 6 Taihe Road BDA, Beijing 100176, P. R. China
| | - Yuting Zheng
- Pharmaron Beijing Co., Ltd., 6 Taihe Road BDA, Beijing 100176, P. R. China
| | - Qianxiu Zhu
- Pharmaron Beijing Co., Ltd., 6 Taihe Road BDA, Beijing 100176, P. R. China
| | - Paul D Smith
- Oncology R&D, AstraZeneca, Cambridge CB4 0WG, U.K
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Ruan Q, Comstock K. A New Workflow for Drug Metabolite Profiling by Utilizing Advanced Tribrid Mass Spectrometry and Data-Processing Techniques. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2021; 32:2050-2061. [PMID: 33998806 DOI: 10.1021/jasms.0c00436] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Drug metabolite profiling utilizes liquid chromatography with tandem mass spectrometry (LC/MS/MS) to acquire ample information for metabolite identification and structural elucidation. However, there are still challenges in detecting and characterizing all potential metabolites that can be masked by a high biological background, especially the unknown and uncommon ones. In this work, a novel metabolite profiling workflow was established on a platform using a state-of-the-art tribrid high-resolution mass spectrometry (HRMS) system. Primarily, an instrumental method was developed based on the novel design of the tribrid system that facilitates in-depth MSn scans with two fragmentation devices. Additionally, different advanced data acquisition techniques were assessed and compared, and automatic background exclusion and deep-scan approaches were adopted to promote assay efficiency and metabolite coverage. Finally, different data-analysis techniques were explored to fully extract metabolite data from the information-rich MS/MS data sets. Overall, a workflow combining tribrid mass spectrometry and advanced acquisition methodology has been developed for metabolite characterization in drug discovery and development. It maximizes the tribrid HRMS platform's utility and enhances the coverage, efficiency, quality, and speed of metabolite profiling assays.
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Affiliation(s)
- Qian Ruan
- Non-clinical Disposition and Bioanalysis, BMS, Princeton, New Jersey 08540, United States
| | - Kate Comstock
- Thermo Fisher Scientific, San Jose, California 95134, United States
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Tsizin S, Fialkov AB, Amirav A. Analysis of impurities in pharmaceuticals by LC-MS with cold electron ionization. JOURNAL OF MASS SPECTROMETRY : JMS 2020; 55:e4587. [PMID: 32662574 DOI: 10.1002/jms.4587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/08/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
Pharmaceuticals require careful and precise determination of their impurities that might harm the user upon consumption. Although today, the most common technique for impurities identification is liquid chromatography-mass spectrometry (LC-MS/MS), it has several downsides due to the nature of the ionization method. Also, the analyses in many cases are targeted thus despite being present, some of the compounds will not be revealed. In this paper, we propose and show a new method for untargeted analysis and identification of impurities in active pharmaceutical ingredients (APIs). The instrument used for these analyses is a novel electron ionization (EI) LC-MS with supersonic molecular beams (SMB). The EI-LC-MS-SMB was implemented for analyses of several drug samples spiked with an impurity. The instrument provides EI mass spectra with enhanced molecular ions, named Cold EI, which increases the identification probabilities when the compound is identified with the aid of an EI library like National Institute of Standards and Technology (NIST). We analyzed ibuprofen and its impurities, and both the API and the expected impurity were identified with names and structures by the NIST library. Moreover, other unexpected impurities were found and identified proving the ability of the EI-LC-MS-SMB system for truly untargeted analysis. The results show a broad dynamic range of four orders of magnitude at the same run with a signal-to-noise ratio of over 10 000 for the API and almost uniform response.
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Affiliation(s)
- Svetlana Tsizin
- School of Chemistry, Tel Aviv University, Tel Aviv, 69978, Israel
| | | | - Aviv Amirav
- School of Chemistry, Tel Aviv University, Tel Aviv, 69978, Israel
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Szalwinski LJ, Holden DT, Morato NM, Cooks RG. 2D MS/MS Spectra Recorded in the Time Domain Using Repetitive Frequency Sweeps in Linear Quadrupole Ion Traps. Anal Chem 2020; 92:10016-10023. [PMID: 32578980 DOI: 10.1021/acs.analchem.0c01719] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ion trap mass spectrometers have emerged as powerful on-site analytical platforms, in spite of limited mass resolution, due to their compatibility with ambient ionization methods and ready implementation of tandem mass spectrometry (MS/MS). When operated at constant trapping voltage, ions can be activated at their secular frequencies and all MS/MS experiments can be performed, including the two-dimensional tandem mass scan (2D MS/MS scan) in which all precursor ions and their subsequent product ions are both identified and correlated. In the new method of performing this 2D MS/MS experiment presented here, the precursor ions are excited by a nonlinear (inverse Mathieu q) frequency sweep while the resulting product ions are identified by their ejection time within a repeating orthogonally applied nonlinear (inverse Mathieu q) frequency sweep. This resulting compact representation contains the total fragmentation behavior of a collection of ionized compounds and captures detailed chemical information efficiently (typically in 1 s). The approach is implemented using a simple single mass analyzer instrument. This methodology was tested on three different multicomponent mixtures: drugs of abuse, peptides, and fentanyl analogs. The data are compared with those obtained by more common MS/MS scan methods.
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Affiliation(s)
- Lucas J Szalwinski
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Dylan T Holden
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Nicolás M Morato
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - R Graham Cooks
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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