1
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Sirén H. Research of saccharides and related biocomplexes: A review with recent techniques and applications. J Sep Sci 2024; 47:e2300668. [PMID: 38699940 DOI: 10.1002/jssc.202300668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/14/2024] [Accepted: 02/26/2024] [Indexed: 05/05/2024]
Abstract
Saccharides and biocompounds as saccharide (sugar) complexes have various roles and biological functions in living organisms due to modifications via nucleophilic substitution, polymerization, and complex formation reactions. Mostly, mono-, di-, oligo-, and polysaccharides are stabilized to inactive glycosides, which are formed in metabolic pathways. Natural saccharides are important in food and environmental monitoring. Glycosides with various functionalities are significant in clinical and medical research. Saccharides are often studied with the chromatographic methods of hydrophilic interaction liquid chromatography and anion exchange chromatograpy, but also with capillary electrophoresis and mass spectrometry with their on-line coupling systems. Sample preparation is important in the identification of saccharide compounds. The cases discussed here focus on bioscience, clinical, and food applications.
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Affiliation(s)
- Heli Sirén
- Chemicum Building, University of Helsinki, Helsinki, Finland
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2
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Yuan Y, Ren M, Zhu C, Lou Y, Liang Q, Xiong Z. Chemoselectivity Strategy Based on B-Label Integrated with Tailored COF for Targeted Metabolomic Analysis of Short-Chain Fatty Acids by UHPLC-MS/MS. Anal Chem 2024; 96:6575-6583. [PMID: 38637908 DOI: 10.1021/acs.analchem.3c05590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Chemoselective extraction strategy is an emerging and powerful means for targeted metabolomics analysis, which allows for the selective identification of biomarkers. Short-chain fatty acids (SCFAs) as functional metabolites for many diseases pose challenges in qualitative and quantitative analyses due to their high polarity and uneven abundance. In our study, we proposed the B-labeled method for the derivatization of SCFAs using easily available 3-aminobenzeneboronic acid as the derivatization reagent, which enables the introduction of recognition unit (boric acid groups). To analyze the B-labeled targeted metabolites accurately, cis-diol-based covalent organic framework (COF) was designed to specifically capture and release target compounds by pH-response borate affinity principle. The COF synthesized by the one-step Schiff base reaction possessed a large surface area (215.77 m2/g), excellent adsorption capacity (774.9 μmol/g), good selectivity, and strong regeneration ability (20 times). Combined with ultrahigh-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) analysis, our results indicated that the detection sensitivities of SCFAs increased by 1.2-2500 folds compared with unlabeled method, and the retention time and isomer separation were improved. Using this strategy, we determined twenty-six SCFAs in the serum and urine of rats in four groups about osteoporosis and identified important biomarkers related to the tricarboxylic acid cycle and fatty acid metabolism pathways. In summary, UHPLC-MS/MS based on B-labeled derivatization with tailored COF strategy shows its high selectivity, excellent sensitivity, and good chromatographic behavior and has remarkable application prospect in targeted metabolomics study of biospecimens.
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Affiliation(s)
- Yue Yuan
- School of Pharmacy, Shenyang Pharmaceutical University, No.26 Huatuo Rd, High & New Tech Development Zone, Benxi, Liaoning 117004, PR China
| | - Mengxin Ren
- School of Pharmacy, Shenyang Pharmaceutical University, No.26 Huatuo Rd, High & New Tech Development Zone, Benxi, Liaoning 117004, PR China
| | - Chengze Zhu
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, No.26 Huatuo Rd, High & New Tech Development Zone, Benxi, Liaoning 117004, PR China
| | - Yanwei Lou
- School of Pharmacy, Shenyang Pharmaceutical University, No.26 Huatuo Rd, High & New Tech Development Zone, Benxi, Liaoning 117004, PR China
| | - Qinghua Liang
- School of Pharmacy, Shenyang Pharmaceutical University, No.26 Huatuo Rd, High & New Tech Development Zone, Benxi, Liaoning 117004, PR China
| | - Zhili Xiong
- School of Pharmacy, Shenyang Pharmaceutical University, No.26 Huatuo Rd, High & New Tech Development Zone, Benxi, Liaoning 117004, PR China
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Gavrilović I, Wüst B, Danaceau J, Braidman E, de la Torre X, Botrè F, Parr MK, Cowan D. Routine application of SFC-MS in doping control: Analysis of 3 × 1000 urine samples using three different SFC-MS instruments. Drug Test Anal 2024. [PMID: 38361255 DOI: 10.1002/dta.3652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 02/17/2024]
Abstract
Supercritical fluid chromatography-mass spectrometry (SFC-MS) has proved to be a beneficial tool for sample analysis for a wide variety of compounds and, as such, has recently gained the attention of the anti-doping community. We have tested the applicability of SFC-MS for routine doping control analysing approximately 3 × 1000 identical anti-doping samples utilising SFC-MS instruments from three different vendors: Agilent Technologies, Waters Corporation and Shimadzu Corporation. A 'dilute and inject' approach either without or after hydrolysis of glucuronide metabolites was applied. Most of the compounds included in our study demonstrated excellent chromatography, whereas some showed co-elution with endogenous interferences requiring MS discrimination. Retention times typically were very stable within batches (%CV ≤ 0.5%), although this appeared to be analyte and column dependent. Chromatographic peak shape was good (symmetrical) and stable over the period of the testing without any change of column. Our results suggest that SFC-MS is a sensitive, reproducible and robust analytical tool ready to be used in anti-doping laboratories alongside the currently applied techniques such as gas and liquid chromatography coupled to mass spectrometry. Even if instruments are designed slightly differently, all three setups demonstrated their fitness for the purpose in anti-doping testing.
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Affiliation(s)
- Ivana Gavrilović
- Drug Control Centre, King's Forensics, Department of Analytical, Environmental and Forensic Sciences, King's College London, London, UK
| | - Bernhard Wüst
- Agilent Technologies GmbH, Hewlett Packard Straße 8, Waldbronn, Germany
| | | | | | | | - Francesco Botrè
- Laboratorio Antidoping FMSI, Rome, Italy
- REDs - Research and Expertise in Antidoping Sciences, ISSUL - Institute de Sciences du Sport, Université de Lausanne, Lausanne, Switzerland
| | | | - David Cowan
- Department of Analytical, Environmental and Forensic Sciences, King's College London, London, UK
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Schena T, von Mühlen C. Chromatographic speed classification for liquid chromatography using average theoretical peak time (ATPT). Anal Chim Acta 2024; 1287:342092. [PMID: 38182344 DOI: 10.1016/j.aca.2023.342092] [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: 09/04/2023] [Revised: 11/19/2023] [Accepted: 11/29/2023] [Indexed: 01/07/2024]
Abstract
BACKGROUND The development of analytical techniques in the field of liquid chromatography has brought new frontiers in performance and analytical speed for the technique. The proper evaluation of the analytical boundaries achieved with those developments was not addressed in the literature, since different liquid chromatography (LC) techniques have not yet received any classification regarding their chromatographic speed. Defining chromatographic analysis speed based simply on analysis time is an outdated concept since it is sample and analyte-dependent. In this context, the application of the Average Theoretical Peak Time concept (ATPT) is proposed as a unified metric for chromatographic speed classification. RESULTS This metric was evaluated using PCA analysis in a group of more than 50 publications, which generated the classification of LC methods in normal, high, hyper, and ultra-high-speed separations using ATPT. Normal speed (ATPT values greater than 18000 ms/peak) was found in HPLC, nano-LC, SFC, and CEC methods. Therefore, high-speed methods (ATPT values between 4000 and 18000 ms/peak) were found in UHPLC techniques, while LC × LC methods presented higher ATPT values between 1000 and 4000 ms/peak being classified as hyper-speed separations. ATPT can also be used as an optimization parameter, since older methods show higher ATPT values, while recent published papers show lower values of this metric. This behavior is justified due to the improvement of the LC methods over the years. SIGNIFICANCE This work fulfills the gap in chromatographic definitions and metrics, regarding analytical speed in one-dimensional and multidimensional liquid chromatographic techniques and shows that ATPT metrics is a robust parameter that can be used to classify the separation speed as well as a metric to evaluate the LC Method optimization. It also corrects the historical application of separation time as a metric for chromatographic speed.
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Affiliation(s)
- Tiago Schena
- Faculty of Technology, Universidade Estadual do Rio de Janeiro (UERJ), Presidente Dutra highway, km 298, Resende, (RJ), 27537-000, Brazil; LECO Instruments, Av. Das Nações Unidas, 12399 - Cj121B, São Paulo, (SP), 04578-000, Brazil.
| | - Carin von Mühlen
- Faculty of Technology, Universidade Estadual do Rio de Janeiro (UERJ), Presidente Dutra highway, km 298, Resende, (RJ), 27537-000, Brazil.
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Petřík I, Pěnčík A, Stýskala J, Tranová L, Amakorová P, Strnad M, Novák O. Rapid profiling of cytokinins using supercritical fluid chromatography coupled with tandem mass spectrometry. Anal Chim Acta 2024; 1285:342010. [PMID: 38057057 DOI: 10.1016/j.aca.2023.342010] [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: 07/19/2023] [Revised: 10/10/2023] [Accepted: 11/07/2023] [Indexed: 12/08/2023]
Abstract
BACKGROUND The determination of plant hormones is still a very challenging analytical discipline, mainly due to their low concentration in complex plant matrices. Therefore, the involvement of very sensitive high-throughput techniques is required. Cytokinins (CKs) are semi-polar basic plant hormones regulating plant growth and development. Modern methods for CK determination are currently based on ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS), which enables the separation of CK isomeric forms occurring endogenously in plants. Here, ultra-high performance supercritical fluid chromatography coupled with tandem mass spectrometry (UHPSFC-MS/MS) was used for the simultaneous determination of 37 CK metabolites. RESULTS The chromatographic conditions were tested on three different columns with various retention mechanisms. Hybrid silica modified with 2-picolylamine was selected as the stationary phase. Several parameters such as column temperature, back pressure regulation, mobile phase composition and make-up solvent were investigated to achieve efficient separation of CK isomers and reasonable sensitivity. Compared to UHPLC-MS/MS, a 9-min chromatographic analysis using a mobile phase of supercritical CO2 and 5 mM ammonia in methanol represents a three-fold acceleration of total run time. The quantification limit of UHPSFC-MS/MS method was in the range of 0.03-0.19 fmol per injection and the method validation showed high accuracy and precision (below 15 % for most analytes). The method was finally applied to the complex plant matrix of the model plant Arabidopsis thaliana and the obtained profiles of CK metabolites were compared with the results from the conventional UHPLC-MS/MS method. SIGNIFICANCE The presented work offers a novel approach for quantification of endogenous CKs in plants. Compared to the conventional UHPLC-MS/MS, the total run time is shorter and the matrix effect lower for the key CK metabolites. This approach opens the opportunity to utilize UHPSFC-MS/MS instrumentation for targeted plant hormonomics including other plant hormone families.
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Affiliation(s)
- Ivan Petřík
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany & Palacký University, Faculty of Science, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Aleš Pěnčík
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany & Palacký University, Faculty of Science, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Jakub Stýskala
- Department of Organic Chemistry, Palacký University, Faculty of Science, 17. listopadu 1192/12, CZ-77146, Olomouc, Czech Republic
| | - Lenka Tranová
- Department of Organic Chemistry, Palacký University, Faculty of Science, 17. listopadu 1192/12, CZ-77146, Olomouc, Czech Republic
| | - Petra Amakorová
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany & Palacký University, Faculty of Science, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Miroslav Strnad
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany & Palacký University, Faculty of Science, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic
| | - Ondřej Novák
- Laboratory of Growth Regulators, The Czech Academy of Sciences, Institute of Experimental Botany & Palacký University, Faculty of Science, Šlechtitelů 27, CZ-78371, Olomouc, Czech Republic.
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Thomas A, Thevis M. Recent advances in mass spectrometry for the detection of doping. Expert Rev Proteomics 2024; 21:27-39. [PMID: 38214680 DOI: 10.1080/14789450.2024.2305432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 01/08/2024] [Indexed: 01/13/2024]
Abstract
INTRODUCTION The analysis of doping control samples is preferably performed by mass spectrometry, because obtained results meet the highest analytical standards and ensure an impressive degree of reliability. The advancement in mass spectrometry and all its associated technologies thus allow for continuous improvements in doping control analysis. AREAS COVERED Modern mass spectrometric systems have reached a status of increased sensitivity, robustness, and specificity within the last decade. The improved sensitivity in particular has, on the other hand, also led to the detection of drug residues that were attributable to scenarios where the prohibited substances were not administered consciously but rather by the unconscious ingestion of or exposure to contaminated products. These scenarios and their doubtless clarification represent a great challenge. Here, too, modern MS systems and their applications can provide good insights in the interpretation of dose-related metabolism of prohibited substances. In addition to the development of new instruments itself, software-assisted analysis of the sometimes highly complex data is playing an increasingly important role and facilitating the work of doping control laboratories. EXPERT OPINION The sensitive analysis and evaluation of a higher number of samples in a shorter time is made possible by the ongoing developments in mass spectrometry.
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Affiliation(s)
- Andreas Thomas
- Institute of Biochemistry/Center for Preventive Doping Research, German Sport University Cologne, Cologne, Germany
| | - Mario Thevis
- Institute of Biochemistry/Center for Preventive Doping Research, German Sport University Cologne, Cologne, Germany
- European Monitoring Center for Emerging Doping Agents (EuMoCEDA), Cologne/Bonn, Germany
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Hayashida M, Suzuki R, Horie S, Masuda J, Yamaguchi T, Obika S. Applicability of supercritical fluid chromatography for oligonucleotide analysis: A proof-of-concept study. J Chromatogr A 2023; 1708:464333. [PMID: 37660558 DOI: 10.1016/j.chroma.2023.464333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 08/10/2023] [Accepted: 08/24/2023] [Indexed: 09/05/2023]
Abstract
We evaluated the suitability of supercritical fluid chromatography (SFC) for oligonucleotide analysis using 4-mer oligonucleotides with various phosphorothioate (PS) contents as model compounds. Column screening showed that the diol-modified column was able to separate sequences with different PS contents. Optimization of the column body and additives allowed us to analyze polar oligonucleotides using SFC. Various sequences were also analyzed using the optimized method. A good peak shape was obtained when the guanine plus cytosine content of the analyte was two or less in the 4-mer oligonucleotides. Furthermore, we found that the retention times of the selected sequences were positively correlated with polar surface areas, indicating that oligonucleotides interact with polar stationary phases. In contrast, more hydrophobic full PS sequences were retained more strongly in the diol column than the full phosphodiester (PO) sequences. This suggests that the diol column has unique selectivity for PO and PS linkages. These results indicate that SFC is potentially applicable to oligonucleotide analysis with a separation mechanism that is different from that of ion-pair reversed-phase liquid chromatography.
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Affiliation(s)
- Momoka Hayashida
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan; Shimadzu Analytical Innovation Research Laboratories, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan; Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan
| | - Risa Suzuki
- Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan
| | - Shinnosuke Horie
- Shimadzu Analytical Innovation Research Laboratories, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan; Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan; Shimadzu Europa GmbH, Albert-Hahn-Strasse 6-10, Duisburg 47269, Federal Republic of Germany
| | - Junichi Masuda
- Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan
| | - Takao Yamaguchi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
| | - Satoshi Obika
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Plachká K, Pilařová V, Horáček O, Gazárková T, Vlčková HK, Kučera R, Nováková L. Columns in analytical-scale supercritical fluid chromatography: From traditional to unconventional chemistries. J Sep Sci 2023; 46:e2300431. [PMID: 37568246 DOI: 10.1002/jssc.202300431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/13/2023]
Abstract
Within this review, we thoroughly explored supercritical fluid chromatography (SFC) columns used across > 3000 papers published from the first study carried out under SFC conditions in 1962 to the end of 2022. We focused on the open tubular capillary, packed capillary, and packed columns, their chemistries, dimensions, and trends in used stationary phases with correlation to their specific interactions, advantages, drawbacks, used instrumentation, and application field. Since the 1990s, packed columns with liquid chromatography and SFC-dedicated stationary phases for chiral and achiral separation are predominantly used. These stationary phases are based on silica support modified with a wide range of chemical moieties. Moreover, numerous unconventional stationary phases were evaluated, including porous graphitic carbon, titania, zirconia, alumina, liquid crystals, and ionic liquids. The applications of unconventional stationary phases are described in detail as they bring essential findings required for further development of the supercritical fluid chromatography technique.
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Affiliation(s)
- Kateřina Plachká
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Veronika Pilařová
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Ondřej Horáček
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Taťána Gazárková
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Hana Kočová Vlčková
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Radim Kučera
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
| | - Lucie Nováková
- Department of Analytical Chemistry, Faculty of Pharmacy in Hradec Králové, Charles University, Hradec Králové, Czech Republic
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Dufayet L, Bargel S, Bonnet A, Boukerma AK, Chevallier C, Evrard M, Guillotin S, Loeuillet E, Paradis C, Pouget AM, Reynoard J, Vaucel JA. Gamma-hydroxybutyrate (GHB), 1,4-butanediol (1,4BD), and gamma-butyrolactone (GBL) intoxication: A state-of-the-art review. Regul Toxicol Pharmacol 2023; 142:105435. [PMID: 37343712 DOI: 10.1016/j.yrtph.2023.105435] [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: 12/02/2022] [Revised: 01/13/2023] [Accepted: 06/12/2023] [Indexed: 06/23/2023]
Abstract
γ-hydroxybutyrate (GHB) is synthesized endogenously from γ-aminobutyric acid (GABA) or exogenously from 1,4-butanediol (butane-1,4-diol; 1,4-BD) or γ-butyrolactone (GBL). GBL, and 1,4-BD are rapidly converted to GHB. The gastric absorption time, volume of distribution, and half-life of GHB are between 5 and 45 min, 0.49 ± 0.9 L/kg, and between 20 and 60 min, respectively. GHB and its analogues have a dose-dependent effect on the activation of GHB receptor, GABA-B, and GABA localized to the central nervous system. After ingestion, most patients present transient neurological disorders (lethal dose: 60 mg/kg). Chronic GHB consumption is associated with disorders of use and a withdrawal syndrome when the consumption is discontinued. GHB, GBL, and 1,4-BD are classified as narcotics but only the use of GHB is controlled internationally. They are used for drug facilitated (sexual) assault, recreational purposes, slamsex, and chemsex. To confirm an exogenous intake or administration of GHB, GBL, or 1-4-BD, the pre-analytical conservation is crucial. The antemortem cutoff doses for detection are 5 and 5-15 mg/L, with detection windows of 6 and 10 h in the blood and urine, respectively Control of GHB is essential to limit the number of users, abuse, associated risks, and death related to their consumption.
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Affiliation(s)
- Laurene Dufayet
- Unité Médico-judiciaire, Hôtel-Dieu, APHP, 75001, Paris, France; Centre Antipoison de Paris - Fédération de Toxicologie (FeTox), Hôpital Fernand-Widal, APHP, 75010, Paris, France; INSERM, UMRS-1144, Faculté de Pharmacie, 75006, Paris, France; UFR de Médecine, Université de Paris, 75010, Paris, France.
| | - Sophie Bargel
- Section Toxicologie - Sécurité Routière, Laboratoire de Police Scientifique de Lille, SNPS, France
| | - Anastasia Bonnet
- Centre Antipoison de Toulouse, CHU de Toulouse, Toulouse, France
| | | | | | - Marion Evrard
- Centre Antipoison de Nancy, CHRU de Nancy, Nancy, France
| | - Sophie Guillotin
- Centre Antipoison de Toulouse, CHU de Toulouse, Toulouse, France
| | | | - Camille Paradis
- Centre Antipoison de Bordeaux CHU de Bordeaux, Bordeaux, France
| | | | - Julien Reynoard
- Pharmacologie Clinique CAP-TV, APHM, Hôpitaux Sud, Marseille, France
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Si-Hung L, Izumi Y, Bamba T. First proof-of-concept of UC/HILIC for extending the versatility of the current art of supercritical fluid separation. Anal Chim Acta 2023; 1240:340741. [PMID: 36641155 DOI: 10.1016/j.aca.2022.340741] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 12/04/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
Supercritical Fluid Chromatography (SFC), a high-throughput separation technique, has been widely applied as a promising routine method in pharmaceutical, pesticides, and metabolome analysis in the same way as conventional liquid chromatography and gas chromatography. Unified chromatography (UC), an advanced version of SFC, which applied gradient elution with mobile phase changing continuously from supercritical to subcritical and to liquid states, can further extend the SFC applications. UC mostly applying the popular mobile phase of 95%:5%/Methanol:Water with additives allows to analyze many hydrophilic compounds. However, many of phosphorylated metabolites or multi carboxylic acids show very poor peak shapes or even can't be eluted under UC conditions, thus hampering the UC's metabolome coverage. In this study, we proposed the first proof-of-concept of UC/HILIC, a novel strategy to extend the current UC metabolome coverage by employing an aqueous gradient right after the UC gradient on a single packed column in a single measurement. The proposed method showed significant improvement regarding the chromatographic performance and metabolome coverage, while still maintaining the precision and high throughput in comparison with conventional UC methods.
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Affiliation(s)
- Le Si-Hung
- Division of Metabolomics/Mass Spectrometry Center, Medical Research Center for High Depth Omics, Medical Institute of Bioregulation, Kyushu University, Japan
| | - Yoshihiro Izumi
- Division of Metabolomics/Mass Spectrometry Center, Medical Research Center for High Depth Omics, Medical Institute of Bioregulation, Kyushu University, Japan
| | - Takeshi Bamba
- Division of Metabolomics/Mass Spectrometry Center, Medical Research Center for High Depth Omics, Medical Institute of Bioregulation, Kyushu University, Japan.
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Dhurjad P, Jaiswal P, Gupta K, Wanjari P, Sonti R. Mass spectrometry: A key tool in anti‐doping. SEPARATION SCIENCE PLUS 2022. [DOI: 10.1002/sscp.202200058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Pooja Dhurjad
- Department of Pharmaceutical Analysis National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad India
| | - Pooja Jaiswal
- Department of Pharmaceutical Analysis National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad India
| | - Kajal Gupta
- Department of Pharmaceutical Analysis National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad India
| | - Parita Wanjari
- Department of Pharmaceutical Analysis National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad India
| | - Rajesh Sonti
- Department of Pharmaceutical Analysis National Institute of Pharmaceutical Education and Research (NIPER) Hyderabad India
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12
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Acide γ-Hydroxybutyrique (GHB), γ-butyrolactone (GBL) et 1,4-butanediol (1,4-BD) : revue de la littérature des aspects pharmacologiques, cliniques, analytiques et médico-légaux. TOXICOLOGIE ANALYTIQUE ET CLINIQUE 2022. [DOI: 10.1016/j.toxac.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Ovchinnikov DV, Vakhrameev SA, Falev DI, Ul’yanovskii NV, Kosyakov DS. Rapid Simultaneous Quantification of 1-Formyl-2,2-Dimethylhydrazine and Dimethylurea Isomers in Environmental Samples by Supercritical Fluid Chromatography-Tandem Mass Spectrometry. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27155025. [PMID: 35956973 PMCID: PMC9370278 DOI: 10.3390/molecules27155025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/03/2022] [Accepted: 08/04/2022] [Indexed: 11/28/2022]
Abstract
When released to the environment, the rocket fuel unsymmetrical dimethylhydrazine (UDMH) undergoes oxidative transformations, resulting in the formation of an extremely large number of nitrogen-containing transformation products, including isomeric compounds which are difficult to discriminate by common chromatography techniques. In the present work, supercritical fluid chromatography–tandem mass spectrometry (SFC-MS/MS) was proposed for resolving the problem of fast separation and simultaneous quantification of 1-formyl-2,2-dimethylhydrazine (FADMH) as one of the major UDMH transformation products, and its isomers—1,1-dimethylurea (UDMU) and 1,2-dimethylurea (SDMU). 2-Ethylpyridine stationary phase provided baseline separation of analytes in 1.5 min without the distortion of the chromatographic peaks. Optimization of SFC separation and MS/MS detection conditions allowed for the development of rapid, sensitive, and “green” method for the simultaneous determination of FADMH, UDMU, and SDMU in environmental samples with LOQs of 1–10 µg L−1 and linear range covering three orders of magnitude. The method was validated and successfully tested on the real extracts of peaty and sandy soils polluted with rocket fuel and UDMH oxidation products. It was shown that both UDMU and SDMU are formed in noticeable amounts during UDMH oxidation. Despite relatively low toxicity, UDMU can be considered one of the major UDMH transformation products and a potential marker of soil pollution with toxic rocket fuel.
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Affiliation(s)
- Denis V. Ovchinnikov
- Laboratory of Environmental Analytical Chemistry, Core Facility Center “Arktika”, Northern (Arctic) Federal University, Arkhangelsk 163002, Russia
| | - Sergey A. Vakhrameev
- Laboratory of Environmental Analytical Chemistry, Core Facility Center “Arktika”, Northern (Arctic) Federal University, Arkhangelsk 163002, Russia
| | - Danil I. Falev
- Laboratory of Environmental Analytical Chemistry, Core Facility Center “Arktika”, Northern (Arctic) Federal University, Arkhangelsk 163002, Russia
| | - Nikolay V. Ul’yanovskii
- Laboratory of Environmental Analytical Chemistry, Core Facility Center “Arktika”, Northern (Arctic) Federal University, Arkhangelsk 163002, Russia
- Federal Center for Integrated Arctic Research, Arkhangelsk 163000, Russia
- Correspondence: (N.V.U.); (D.S.K.)
| | - Dmitry S. Kosyakov
- Laboratory of Environmental Analytical Chemistry, Core Facility Center “Arktika”, Northern (Arctic) Federal University, Arkhangelsk 163002, Russia
- Correspondence: (N.V.U.); (D.S.K.)
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14
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Quality by design approach for enantioseparation of terbutaline and its sulfate conjugate metabolite for bioanalytical application using supercritical fluid chromatography. J Chromatogr A 2022; 1676:463285. [DOI: 10.1016/j.chroma.2022.463285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 06/21/2022] [Accepted: 06/25/2022] [Indexed: 11/24/2022]
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15
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Koley S, Chu KL, Gill SS, Allen DK. An efficient LC-MS method for isomer separation and detection of sugars, phosphorylated sugars, and organic acids. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:2938-2952. [PMID: 35560196 DOI: 10.1093/jxb/erac062] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 02/15/2022] [Indexed: 06/15/2023]
Abstract
Assessing central carbon metabolism in plants can be challenging due to the dynamic range in pool sizes, with low levels of important phosphorylated sugars relative to more abundant sugars and organic acids. Here, we report a sensitive liquid chromatography-mass spectrometry method for analysing central metabolites on a hybrid column, where both anion-exchange and hydrophilic interaction chromatography (HILIC) ligands are embedded in the stationary phase. The liquid chromatography method was developed for enhanced selectivity of 27 central metabolites in a single run with sensitivity at femtomole levels observed for most phosphorylated sugars. The method resolved phosphorylated hexose, pentose, and triose isomers that are otherwise challenging. Compared with a standard HILIC approach, these metabolites had improved peak areas using our approach due to ion enhancement or low ion suppression in the biological sample matrix. The approach was applied to investigate metabolism in high lipid-producing tobacco leaves that exhibited increased levels of acetyl-CoA, a precursor for oil biosynthesis. The application of the method to isotopologue detection and quantification was considered through evaluating 13C-labeled seeds from Camelina sativa. The method provides a means to analyse intermediates more comprehensively in central metabolism of plant tissues.
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Affiliation(s)
- Somnath Koley
- Donald Danforth Plant Science Center, St Louis, MO 63132, USA
| | - Kevin L Chu
- Donald Danforth Plant Science Center, St Louis, MO 63132, USA
- United States Department of Agriculture-Agriculture Research Service, Donald Danforth Plant Science Center, St Louis, MO 63132, USA
| | - Saba S Gill
- Donald Danforth Plant Science Center, St Louis, MO 63132, USA
- United States Department of Agriculture-Agriculture Research Service, Donald Danforth Plant Science Center, St Louis, MO 63132, USA
| | - Doug K Allen
- Donald Danforth Plant Science Center, St Louis, MO 63132, USA
- United States Department of Agriculture-Agriculture Research Service, Donald Danforth Plant Science Center, St Louis, MO 63132, USA
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16
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Gazárková T, Plachká K, Svec F, Nováková L. Current state of supercritical fluid chromatography-mass spectrometry. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116544] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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17
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Parr MK, Botrè F. Supercritical fluid chromatography mass spectrometry as an emerging technique in doping control analysis. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2021.116517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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18
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SFC in GMP testing and quality control of medicinal drug products. SEP SCI TECHNOL 2022. [DOI: 10.1016/b978-0-323-88487-7.00010-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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19
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Si-Hung L, Bamba T. Current state and future perspectives of supercritical fluid chromatography. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116550] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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20
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Yamamoto K, Machida K, Kotani A, Hakamata H. Emerging Separation Techniques in Supercritical Fluid Chromatography. Chem Pharm Bull (Tokyo) 2021; 69:970-975. [PMID: 34602578 DOI: 10.1248/cpb.c21-00306] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Supercritical fluid chromatography (SFC) has unique separative characteristics distinguished from those of HPLC and gas chromatography. At present, SFC is widely used and there are many applications in various biological, medical, and pharmaceutical fields. In this review, we focus on recently developed novel techniques related to SFC separation including: new column stationary phases, microfluidics, two-dimensional separation, and gas-liquid separation. In addition, we discuss the application of SFC using a water-containing modifier to biological molecules such as amino acids, peptides, and small proteins that had been challenging analytes.
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Affiliation(s)
- Kazuhiro Yamamoto
- Department of Analytical Chemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Koichi Machida
- Department of Analytical Chemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Akira Kotani
- Department of Analytical Chemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
| | - Hideki Hakamata
- Department of Analytical Chemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences
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21
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Losacco GL, Veuthey JL, Guillarme D. Metamorphosis of supercritical fluid chromatography: A viable tool for the analysis of polar compounds? Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116304] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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22
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Meng X, Pang H, Sun F, Jin X, Wang B, Yao K, Yao L, Wang L, Hu Z. Simultaneous 3-Nitrophenylhydrazine Derivatization Strategy of Carbonyl, Carboxyl and Phosphoryl Submetabolome for LC-MS/MS-Based Targeted Metabolomics with Improved Sensitivity and Coverage. Anal Chem 2021; 93:10075-10083. [PMID: 34270209 DOI: 10.1021/acs.analchem.1c00767] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Metabolomics is a powerful and essential technology for profiling metabolic phenotypes and exploring metabolic reprogramming, which enables the identification of biomarkers and provides mechanistic insights into physiology and disease. However, its applications are still limited by the technical challenges particularly in its detection sensitivity for the analysis of biological samples with limited amount, necessitating the development of highly sensitive approaches. Here, we developed a highly sensitive liquid chromatography tandem mass spectrometry method based on a 3-nitrophenylhydrazine (3-NPH) derivatization strategy that simultaneously targets carbonyl, carboxyl, and phosphoryl groups for targeted metabolomic analysis (HSDccp-TM) in biological samples. By testing 130 endogenous metabolites including organic acids, amino acids, carbohydrates, nucleotides, carnitines, and vitamins, we showed that the derivatization strategy resulted in significantly improved detection sensitivity and chromatographic separation capability. Metabolic profiling of merely 60 oocytes and 5000 hematopoietic stem cells primarily isolated from mice demonstrated that this method enabled routine metabolomic analysis in trace amounts of biospecimens. Moreover, the derivatization strategy bypassed the tediousness of inferring the MS fragmentation patterns and simplified the complexity of monitoring ion pairs of metabolites, which greatly facilitated the metabolic flux analysis (MFA) for glycolysis, the tricarboxylic acid (TCA) cycle, and pentose phosphate pathway (PPP) in cell cultures. In summary, the novel 3-NPH derivatization-based method with high sensitivity, good chromatographic separation, and broad coverage showed great potential in promoting metabolomics and MFA, especially in trace amounts of biospecimens.
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Affiliation(s)
- Xiangjun Meng
- School of Pharmaceutical Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing 100084, China
| | - Huanhuan Pang
- School of Pharmaceutical Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing 100084, China
| | - Fei Sun
- School of Pharmaceutical Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing 100084, China
| | - Xiaohan Jin
- Department of Biochemistry and Molecular Biology, Capital Medical University, Beijing 100069, China
| | - Bohong Wang
- School of Pharmaceutical Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing 100084, China
| | - Ke Yao
- School of Pharmaceutical Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing 100084, China
| | - LiAng Yao
- School of Pharmaceutical Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing 100084, China
| | - Lijuan Wang
- School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Zeping Hu
- School of Pharmaceutical Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing 100084, China
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23
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Li P, Yip H, Sun D, Kempson J, Caceres-Cortes J, Mathur A, Wu DR. Sub/supercritical Fluid Chromatography Purification and Desalting of a Cyclic Dinucleotide STING Agonist. J Chromatogr A 2021; 1652:462356. [PMID: 34218126 DOI: 10.1016/j.chroma.2021.462356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 06/10/2021] [Accepted: 06/14/2021] [Indexed: 10/21/2022]
Abstract
An efficient and "endotoxin-free" purification of a cyclic dinucleotide (CDN) STING agonist was achieved to produce multigram quantities of pure BMT-390025, an active pharmaceutical ingredient (API), for toxicological studies. A two-step sub/supercritical fluid chromatography (SFC) procedure was developed for the achiral purification and desalting of the polar ionic CDN. A robust SFC process employing methanol-acetonitrile-water with ammonium acetate as co-solvent in CO2 on BEH 2-ethylpyridine was established and scaled up as the first step to achieve a successful purification. The desalting/salt-switching (i.e. removing acetate and acetamide) was conducted using methanol-water with ammonium hydroxide as co-solvent on the same column in the second step to convert the final API to the ammonium salt. Water with additive was essential to eliminating salt precipitation and improving the peak shape and resolution. Due to the extreme hydrophilicity of BMT-390025, 65% of co-solvent was needed to adequately elute the target in both steps. More than 40 g of crude API was purified and desalted producing >20 g of pure BMT-390025 as the ammonium salt which was obtained with a chemical purity of >98.5% and met the endotoxin requirement of <0.1 EU/mg. In addition, >80 g of its penultimate prior to the deprotection of the silyl group was purified at a high throughput of 6.3 g/h (0.42 g/day/g SP).
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Affiliation(s)
- Peng Li
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States.
| | - Henry Yip
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States.
| | - Dawn Sun
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
| | - James Kempson
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
| | - Janet Caceres-Cortes
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
| | - Arvind Mathur
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
| | - Dauh-Rurng Wu
- Department of Discovery Synthesis, Research and Early Development, Bristol Myers Squibb, Princeton, New Jersey, 08540, United States
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24
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Li P, Wu DR, Yip H, Sun D, Zhang H, Hou X, Kempson J, Mathur A. The effect of water on the large-scale supercritical fluid chromatography purification of two factor XIa active pharmaceutical ingredients. J Chromatogr A 2021; 1651:462318. [PMID: 34161834 DOI: 10.1016/j.chroma.2021.462318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/25/2021] [Accepted: 05/27/2021] [Indexed: 11/24/2022]
Abstract
BMS-962212, a parenteral Factor XIa inhibitor, was scaled-up for toxicity studies. Two steps of supercritical fluid chromatography (SFC) were developed for the chiral resolution of the penultimate and achiral purification of final active pharmaceutical ingredient (API), BMS-962212. A robust SFC process using Chiralcel OD-H with methanol-acetonitrile as modifier in CO2 was established to achieve a stable and uninterrupted operation with reduced mobile phase viscosity and system pressure drop. More than 230 g of the racemic penultimate was chirally resolved to reach >99% chiral purity, ready for final tert-butyl ester deprotection to provide the API. There were a significant number of impurities in BMS-962212 generated from the final step that needed to be removed. In contrast to conventional SFC conditions, an SFC method exploiting water and ammonia as additives in both the mobile phase and sample solution was developed to accomplish purification and desalting (i.e. removing TFA) of the zwitterionic API in one step. Water as an additive eliminated salt precipitation and improved the resolution while ammonia contributed to the desalting, details of which will be discussed in this article. A throughput of 2 g/h was achieved, and >80 g of the crude API was purified. The same strategy was applied to another Factor XIa API (compound A) and its penultimate.
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Affiliation(s)
- Peng Li
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, United States
| | - Dauh-Rurng Wu
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, United States.
| | - Henry Yip
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, United States
| | - Dawn Sun
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, United States
| | - Huiping Zhang
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, United States
| | - Xiaoping Hou
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, United States
| | - James Kempson
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, United States
| | - Arvind Mathur
- Department of Discovery Synthesis, Bristol Myers Squibb Research and Early Development, Route 206 & Province Line Rd, Princeton, NJ 08543-4000, United States
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25
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Bertol E, Mari F, Lachi A, Tespio G, Vaiano F. Determination of endogenous GHB levels in chest and pubic hair. Forensic Sci Int 2021; 325:110857. [PMID: 34098474 DOI: 10.1016/j.forsciint.2021.110857] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 05/26/2021] [Accepted: 05/28/2021] [Indexed: 11/29/2022]
Abstract
Endogenous nature of GHB represents a critical issue for forensic toxicologists, especially in alleged sexual assaults. Therefore, discrimination between physiologically and additional amounts from exogenous sources of such a substance must be effective and reliable in order to avoid severe misinterpretation. This study aimed to quantify the GHB baseline concentrations in chest and pubic hairs collected from 105 healthy volunteers, non-consumers of any drugs of abuse. The final scope was to investigate if these keratin matrices could represent valid alternative to scalp hair when not available. Moreover, we also evaluated the age and gender influences on the GHB baseline levels. 25 mg of hair were incubated overnight with NaOH at 56 °C. After acidification with H2SO4, the solution was liquid-liquid extracted with ethyl acetate and a trimethylsilyl derivatization was then achieved. Analysis was performed in gas chromatography-mass spectrometry in single ion monitoring mode (m/z 233, 234, 147 for GHB; m/z 239, 240 and 147 for GHB-d6). The endogenous amount in "blank" hair was estimated by the standard addition method (0.301 for chest hair and 0.235 ng/mg for pubic hair). GHB concentration ranged from 0.205 to 1.511 ng/mg for chest hair and from 0.310 to 1.913 ng/mg for pubic hair. These values were consistent with previous studies on scalp hair and on pubic hair. Unfortunately, research on chest hair is not available in literature. T-Test and Linear Regression highlighted no statistically significant differences for the two matrices and for all age/gender sub-groups. However, further studies are required to estimate a reliable cut-off value for these keratin matrices. For the first time, we demonstrated the suitability of chest and pubic hair to detect endogenous levels of GHB.
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Affiliation(s)
- Elisabetta Bertol
- Forensic Toxicology Division, Department of Health Science, University of Florence, Largo Brambilla 3, Florence, Italy; U.R.I.To.N - Unit of Research of University of Florence, Florence, Italy
| | - Francesco Mari
- Forensic Toxicology Division, Department of Health Science, University of Florence, Largo Brambilla 3, Florence, Italy; U.R.I.To.N - Unit of Research of University of Florence, Florence, Italy
| | - Alessio Lachi
- Department of Statistics, Computer Science, Applications "G. Parenti", University of Florence, Florence, Italy
| | - Giusy Tespio
- Forensic Toxicology Division, Department of Health Science, University of Florence, Largo Brambilla 3, Florence, Italy
| | - Fabio Vaiano
- Forensic Toxicology Division, Department of Health Science, University of Florence, Largo Brambilla 3, Florence, Italy; U.R.I.To.N - Unit of Research of University of Florence, Florence, Italy.
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26
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The Inclusion in WADA Prohibited List Is Not Always Supported by Scientific Evidence: A Narrative Review. Asian J Sports Med 2021. [DOI: 10.5812/asjsm.110753] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Context: Our goal was to review the current literature regarding the ability of substances that have recently been included in the WADA prohibited list (i.e., meldonium, trimetazidine, xenon, and cobalt) or in the monitoring program (i.e., ecdysterone and bemethyl) to enhance performance in athletes or cause adverse effects. Evidence Acquisition: To find out which studies led to the prohibition of the substances mentioned, we searched the PubMed database using keywords including the substances’ or methods’ names, as well as phrases related to various aspects of sports activities and health assessments of athletes. Results: The results obtained during our systematic literature search clearly indicate that there is a lack of scientific evidence supporting the impact of several substances prohibited by WADA (i.e., meldonium, trimetazidine, xenon, and cobalt) on athletic performance or on health in athletes. Conclusions: There is insufficient evidence that the previously mentioned substances have any performance enhancing potential. If left on the list, meldonium may be classified as a “specified substance” because of its wide availability and due to the fact that this drug that can be easily bought over the counter without a prescription.
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