1
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Sun Y, Giacomello G, Girreser U, Steff J, Bureik M, de la Torre X, Botrè F, Parr MK. Characterization and quantitation of a sulfoconjugated metabolite for detection of methyltestosterone misuse and direct identification by LC-MS. J Steroid Biochem Mol Biol 2024; 242:106527. [PMID: 38710312 DOI: 10.1016/j.jsbmb.2024.106527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 04/15/2024] [Accepted: 04/21/2024] [Indexed: 05/08/2024]
Abstract
Methyltestosterone (MT) is one of the most frequently misused anabolic androgenic steroids detected in doping control analysis. The metabolism of MT in humans leads to several phase І metabolites and their corresponding phase Ⅱ conjugates. Previous studies have postulated the 3α-sulfoconjugate of 17α-methyl-5β-androstane-3α,17β-diol (S2) as principal sulfate metabolite of MT, with a detection window exceeding 10 days. However, a final direct and unambiguous confirmation of the structure of this metabolite is missing until now. In this study, we established an approach to detect and identify S2, using intact analysis by liquid chromatography hyphenated with tandem mass spectrometry (LC-MS/MS) without complex sample pretreatment. An in vitro study yielded the LC-MS/MS reference retention times of all 3-sulfated 17-methylandrostane-3,17-diol diastereomers, allowing for accurate structure assignment of potentially detected metabolites. In an in vivo excretion study with a single healthy male volunteer, the presence of the metabolite S2 was confirmed after a single oral dose of 10 mg MT. The reference standard was chemically synthesized, characterized by accurate mass mass spectrometry (MS) and nuclear magnetic resonance (NMR), and quantified by quantitative NMR (qNMR). Thus, this study finally provides accurate structure information on the S2 metabolite and a direct analytical method for detection of MT misuse. The availability of the reference material is expected to facilitate further evaluation and subsequent analytical method validation in anti-doping research.
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Affiliation(s)
- Yanan Sun
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Str. 2 + 4, Berlin 14195, Germany
| | - Ginevra Giacomello
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Str. 2 + 4, Berlin 14195, Germany
| | - Ulrich Girreser
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy, Christian-Albrechts-Universität zu Kiel, Kiel 24118, Germany
| | - Jakob Steff
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Str. 2 + 4, Berlin 14195, Germany
| | - Matthias Bureik
- School of Pharmaceutical Science and Technology, Faculty of Medicine, Tianjin University, 92 Weijin Lu, Nankai District, Tianjin 300072, China
| | | | - Francesco Botrè
- Laboratorio Antidoping FMSI, Largo Giulio Onesti 1, Rome 00197, Italy,; REDs - Research and Expertise on Antidoping sciences, ISSUL - Institute des sciences du sport, Université de Lausanne, Synathlon 3224 - Quartier Centre, Lausanne 1015, Switzerland
| | - Maria Kristina Parr
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Str. 2 + 4, Berlin 14195, Germany,.
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2
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Kwak YB, Yoon J, Yoo HH. Rapid investigating of phase I metabolites of SR9009 in vitro horse liver microsomes via feature-based molecular networking approach: Potential applications in doping control. J Pharm Biomed Anal 2024; 246:116190. [PMID: 38735208 DOI: 10.1016/j.jpba.2024.116190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/11/2024] [Accepted: 04/28/2024] [Indexed: 05/14/2024]
Abstract
SR9009, a peroxisome proliferator-activated receptor δ (PPARδ) agonist, is known for its potential benefits in energy homeostasis. It failed to receive the United States Food and Drug Administration (USFDA) approval and its illegal distribution has raised concerns. As a result, it has been classified as a prohibited substance by the World Anti-Doping Agency and the International Federation of Horseracing Authorities (IFHA). This study emphasizes the application of the in-silico molecular networking technology to analyze phase I drug metabolites in horses, distinguishing it from conventional methodologies in forensic science. Feature-based molecular networking (FBMN) analysis identified 15 metabolites, with novel major N-dealkylated metabolite (-C8H7NO4S), indicative of diverse metabolic modifications in horse liver microsomes incubation assay. Additionally, a proposed metabolic pathway of SR9009 in the in vitro assay was outlined, including the previously known dehydroxylated metabolite. Finally, the metabolic pathways included in this study were as follows: hydroxylation, dehydrogenation, N-dealkylation dihydroxylation, and combinations. Molecular networking provided insights into MS spectra connectivity, facilitating rapid interpretation and accurate detection of previously undiscovered metabolites. In conclusion, this study contributes to the understanding of SR9009 metabolism in horses and underscores the importance of advanced analytical techniques, such as molecular networking, in enhancing the accuracy and efficiency of metabolite analysis for forensic and doping control purposes.
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Affiliation(s)
- Young Beom Kwak
- Racing Laboratory, Korea Racing Authority, Jeju, Republic of Korea
| | - Jungho Yoon
- Equine Clinic, Korea Racing Authority, Jeju, Republic of Korea
| | - Hye Hyun Yoo
- Pharmacomicrobiomics Research Center and College of Pharmacy, Hanyang University, Ansan, Republic of Korea.
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3
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Liu L, Karim Z, Schlörer N, de la Torre X, Botrè F, Zoschke C, Parr MK. Biotransformation of anabolic androgenic steroids in human skin cells. J Steroid Biochem Mol Biol 2024; 237:106444. [PMID: 38092130 DOI: 10.1016/j.jsbmb.2023.106444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/20/2023] [Accepted: 12/07/2023] [Indexed: 02/04/2024]
Abstract
In comparison to well-known drug-metabolizing organs such as the liver, the metabolic capacity of human skin is still not well elucidated despite the widespread use of topical drug application. To gain a comprehensive insight into anabolic steroid metabolism in the skin, six structurally related anabolic androgenic steroids, testosterone, metandienone, methyltestosterone, clostebol, dehydrochloromethyltestosterone, and methylclostebol, were applied to human keratinocytes and fibroblasts derived from the juvenile foreskin. Phase I metabolites obtained from incubation media were analyzed by gas chromatography-mass spectrometry. The 5α-reductase activity was predominant in the metabolic pathways as supported by the detection of 5α-reduced metabolites after incubation of testosterone, methyltestosterone, clostebol, and methylclostebol. Additionally, the stereochemistry structures of fully reduced metabolites (4α,5α-isomers) of clostebol and methylclostebol were newly confirmed in this study by the help of inhouse synthesized reference materials. The results provide insights into the steroid metabolism in human skin cells with respect to the characteristics of the chemical structures.
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Affiliation(s)
- Lingyu Liu
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Straße 2+4, 14195 Berlin, Germany
| | - Ziaul Karim
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Straße 2+4, 14195 Berlin, Germany
| | - Nils Schlörer
- Faculty of Chemistry and Earth Sciences, Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
| | | | - Francesco Botrè
- Laboratorio Antidoping FMSI, Largo Giulio Onesti 1, 00197 Rome, Italy; REDs - Research and Expertise on Antidoping sciences, ISSUL - Institute de sciences du sport, Université de Lausanne, Synathlon 3224 - Quartier Centre, 1015 Lausanne, Switzerland
| | - Christian Zoschke
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Straße 2+4, 14195 Berlin, Germany; Federal Office of Consumer Protection and Food Safety, Department of Veterinary Drugs, Gerichtstr. 49, 13347 Berlin, Germany
| | - Maria Kristina Parr
- Institute of Pharmacy, Freie Universität Berlin, Königin-Luise-Straße 2+4, 14195 Berlin, Germany.
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4
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Broberg MN, Ohlsson RT, Bondesson U, Pettersson C, Tidstedt B, Thevis M, Hedeland M. A multivariate data analysis approach for the investigation of in vitro derived metabolites of ACP-105 in comparison with human in vivo metabolites. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1231:123927. [PMID: 37972465 DOI: 10.1016/j.jchromb.2023.123927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 11/19/2023]
Abstract
Selective androgen receptor modulators (SARMs) such as ACP-105 are prohibited in sports due to their anabolic properties. ACP-105 has in previous equine studies shown to undergo extensive metabolism, which makes its metabolite profile important to investigate in humans, since the metabolism is unknown in this species. The aims of the study were to systematically optimize in vitro microsome incubations for improved metabolite yield and to utilize a multivariate data analysis (MVDA) approach to aid the metabolite discovery. Microsomes together with S9 fractions were used at optimal conditions, both with and without phase II additives. Furthermore, the relevance of the in vitro derived metabolites was evaluated as analytical targets in doping control by comparison with results from a human post-administration urine sample collected after a single dose of 100 µg ACP-105. All samples were analyzed with liquid chromatography - Orbitrap mass spectrometry. The use of the systematical optimization and MVDA greatly simplified the search and a total of 18 in vitro metabolites were tentatively identified. The yield of the two main monohydroxylated isomers increased by 24 and 10 times, respectively. In the human urine sample, a total of seven metabolites of ACP-105, formed by a combination of hydroxylations and glucuronic acid conjugations, were tentatively identified. The main metabolites were two monohydroxylated forms that are suggested as analytical targets for human doping control after hydrolysis. All the in vivo metabolites could be detected with the MVDA approach on the in vitro models, demonstrating its usefulness for prediction of the in vivo metabolite profile.
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Affiliation(s)
- Malin Nilsson Broberg
- Department of Medicinal Chemistry, Uppsala University, Box 574, 75123 Uppsala, Sweden
| | | | - Ulf Bondesson
- Department of Medicinal Chemistry, Uppsala University, Box 574, 75123 Uppsala, Sweden
| | - Curt Pettersson
- Department of Medicinal Chemistry, Uppsala University, Box 574, 75123 Uppsala, Sweden
| | - Börje Tidstedt
- Department of Chemistry, Environment and Feed Hygiene, National Veterinary Institute (SVA), 75189 Uppsala, Sweden
| | - Mario Thevis
- Institute of Biochemistry, Center for Preventive Doping Research, German Sport University, 50933 Cologne, Germany
| | - Mikael Hedeland
- Department of Medicinal Chemistry, Uppsala University, Box 574, 75123 Uppsala, Sweden.
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5
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Ishii H, Shibuya M, Kusano K, Sone Y, Kamiya T, Wakuno A, Ito H, Miyata K, Yamada M, Leung GNW. First evidence of the incorporation of daprodustat and other hypoxia-inducible factor stabilizers into equine hair by passive transfer based on segmental quantitative analysis. J Pharm Biomed Anal 2023; 235:115600. [PMID: 37516063 DOI: 10.1016/j.jpba.2023.115600] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/17/2023] [Accepted: 07/21/2023] [Indexed: 07/31/2023]
Abstract
Daprodustat is a hypoxia-inducible factor prolyl hydroxylase domain (HIF-PHD) inhibitor and is used as an erythropoiesis stimulant for the treatment of anemia in humans. In general, administering daprodustat to horses will result in a lifetime ban from both equestrian sports and horseracing by the International Federation of Horseracing Authorities and the Fédération Équestre Internationale, respectively. To control the misuse/abuse of daprodustat, we conducted nasoesophageal administration of daprodustat (100 mg/day for 3 days) to three thoroughbred mares and the post-administration hair samples collected from the three horses over 6 months were analyzed to demonstrate the potential longer-term detection of daprodustat and its metabolites in hair compared with the detection times of daprodustat of 1 and 2 weeks in plasma and urine respectively. The results of the quantitative 2-cm segmental analysis showed that daprodustat was primarily localized in the proximal region (0-2 cm) at 0.375-0.463 pg/mg at 1 month post-administration. These drug bands were gradually spread out along the hair shaft at a rate consistent with the reported growth rate of horse mane hair (approximately 2.5 cm/month) over the following 6 months. In addition, to attain deeper insight into the mechanism of drug incorporation into hair, a total of 11 relevant parameters, including the actual PK parameters and simulated physicochemical and biopharmaceutical parameters for three HIF stabilizers (i.e., daprodustat, vadadustat, and IOX4), were investigated after normalization of the z-scores of all these parameters. Multiple regression analysis indicated that the major factors contributing to the incorporation of the three drugs into hair were their maximum plasma concentrations and lipophilicities, strongly suggesting that the three HIF stabilizers permeated from the bloodstream into the hair bulb via passive transfer with concentration gradients. This work is the first reported evidence showing the incorporation of HIF stabilizers into hair via passive transfer. In addition, cross-species comparison of drug incorporations into hair between daprodustat in horse and roxadustat in human was made in order to have a better understanding of the interactive interpretations about the analysis results obtained from different species. The above findings are not only useful and beneficial for the purpose of doping control but also provide a better understanding of the mechanism of drug incorporation into horse hair.
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Affiliation(s)
- Hideaki Ishii
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi 320-0851, Japan; Department of Pharmaceutical Sciences, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574, Japan.
| | - Mariko Shibuya
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi 320-0851, Japan
| | - Kanichi Kusano
- Veterinarian Section, Equine Department, Japan Racing Association, 6-11-1 Roppongi, Minato-ku, Tokyo 105-0003, Japan
| | - Yu Sone
- Veterinarian Section, Equine Department, Japan Racing Association, 6-11-1 Roppongi, Minato-ku, Tokyo 105-0003, Japan
| | - Takahiro Kamiya
- Equine Veterinary Clinic, Horse Racing School, Japan Racing Association, 835-1 Ne, Shiroi, Chiba 270-1431, Japan
| | - Ai Wakuno
- Equine Veterinary Clinic, Horse Racing School, Japan Racing Association, 835-1 Ne, Shiroi, Chiba 270-1431, Japan
| | - Hideki Ito
- Equine Veterinary Clinic, Horse Racing School, Japan Racing Association, 835-1 Ne, Shiroi, Chiba 270-1431, Japan
| | - Kenji Miyata
- JRA Equestrian Park Utsunomiya Office, 321-4 Tokamicho, Utsunomiya, Tochigi 320-0856, Japan
| | - Masayuki Yamada
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi 320-0851, Japan
| | - Gary Ngai-Wa Leung
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi 320-0851, Japan
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6
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Chen Q, Wang Z, Chen H. A hydrophobic deep eutectic solvent-based vortex-assisted liquid-liquid microextraction applied for doping control of aromatase inhibitors from equine urine. J Pharm Biomed Anal 2023; 234:115583. [PMID: 37494867 DOI: 10.1016/j.jpba.2023.115583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 06/30/2023] [Accepted: 07/13/2023] [Indexed: 07/28/2023]
Abstract
Aromatase inhibitors (AIs) can indirectly cause increased testosterone in animals, which leads to the improvement of the athletic ability of horses. For the protection of horses and the consideration of fair competition, AIs were listed as prohibited drugs by the Federation Equestre Internationale (FEI). There were several disadvantages using traditional pretreatment methods before analyzing these drugs from biological samples. A rapid and green pretreatment method has been developed by utilizing the hydrophobic deep eutectic solvent (DES)-based vortex-assisted liquid-liquid microextraction (DES-VALLME) followed by ultra-high performance liquid chromatography tandem triple-quadrupole mass spectrometry (UHPLC-MS/MS) technique for the efficient extraction and sensitive detection of AIs in equine urine samples. The combination of menthol and 4-fluorophenol in a molar ratio 1:4 was chosen as the optimum composition of DES for extracting AIs. Under the optimum conditions, only 80 μL of DES, 1 mL equine urine and 2 min were expended. An external standard calibration method was utilized for determination, and a linear relationship was achieved with a concentration range of 0.02-4000 ng mL-1 (r2 ≥ 0.9983). The limits of detection of the method based on a signal-to-noise ratio of 3 were 0.01-4 ng mL-1. The accuracy recoveries ranged from 94.9% to 113.4% within the intra-day and inter-day relative standard deviations of less than 9.1%. Compared with traditional extraction methods, the DES-VALLME method had the advantages of rapidity, simplicity, efficiency, low toxicity, and low cost. This method has potential and possessed brilliant prospects for doping control.
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Affiliation(s)
- Qian Chen
- Equine Science Research and Horse Doping Control Laboratory, Wuhan Business University, Wuhan 430056, China.
| | - Zhao Wang
- Equine Science Research and Horse Doping Control Laboratory, Wuhan Business University, Wuhan 430056, China
| | - Huaixia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
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7
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Chang WCW, Hsu MC, Liao PC. Detection of emerging patterns of drug misuse in sports via wastewater monitoring: A mini-review and potential strategies. Environ Pollut 2023; 333:122087. [PMID: 37348696 DOI: 10.1016/j.envpol.2023.122087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 06/24/2023]
Abstract
Biological testing is a key component of the current anti-doping programme implemented by the authorities to detect doping in sports. Strategies such as longitudinal individualised data analysis and sport-specific analysis have been developed to increase the comprehensiveness of the testing. However, the trends of drug misuse in sports might not be effectively captured through today's testing plan. Wastewater testing, assembling individual-level data of a designated group to produce population-level results in one single aggregated sample, can be employed to as a complementary strategy offering added value for doping control. This paper presents an updated summary of the status of anti-doping testing and analytical methodologies for wastewater. The available literature on wastewater-based analyses of drugs prohibited in sports is reviewed. Publications surrounding sporting activities or competitions and others relevant to sports doping are selected. We debate between potential strategies and major limitations of using wastewater monitoring in anti-doping. Knowledge gaps and research directions, specifically on metabolites, stability, sensitivity, and ethical and legal considerations, are discussed. Choosing different wastewater sampling sites allows target sub-population that involved competing athletes and potentially reveal sport-specific or athlete-level-specific behaviour. Sampling from on-board toilets or athlete villages could target international-level athletes, sampling from the dormitories of national training centres allows monitoring of national-level athletes on a daily basis, and sampling from sports stadiums provides a full picture of drug use in the general population during an event. Confounding occurs as (i) the presence of non-athlete composition and the difficulty of analyses to be completely selective to the athlete population; and (ii) the identification of compounds prescribed legitimately with Therapeutic Use Exemptions, only banned in-competition, and naturally occurring. The practicalities of the approach are contextualised in monitoring the non-threshold substances such as anabolic agents, selective androgen receptor modulators, metabolic modulators, and hypoxia-inducible factor activators.
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Affiliation(s)
- William Chih-Wei Chang
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 807, Taiwan; College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 807, Taiwan.
| | - Mei-Chich Hsu
- Department of Sports Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan.
| | - Pao-Chi Liao
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, 704, Taiwan.
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Zhang J, Lu J, Zhang Y, Wang Y. A LC-MS/MS method for determination of clenbuterol enantiomers in animal tissues and its application to the enantioselective distribution in Bama mini-pigs. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1226:123790. [PMID: 37329777 DOI: 10.1016/j.jchromb.2023.123790] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/05/2023] [Accepted: 06/08/2023] [Indexed: 06/19/2023]
Abstract
OBJECTIVES To establish and validate a simple and reliable analytical method for separation and determination of clenbuterol enantiomers (R-(-)-clenbuterol & S-(+)-clenbuterol) in animal tissues, and apply it to the enantioselective distribution of clenbuterol in Bama mini-pigs. METHODS A LC-MS/MS analytical method was developed and validated in positive multiple reaction monitoring mode with electrospray ionization. After perchloric acid deproteinization, samples were pretreated only by one step liquid-liquid extraction using tert-butyl methyl ether under strong alkaline condition. Teicoplanin was used as chiral selector and 10 mM ammonium formate methanol solution was used as mobile phase. The optimized chromatographic separation conditions were completed in 8 min. Two chiral isomers in 11 edible tissues from Bama mini-pigs were investigated. RESULTS R-(-)-clenbuterol and S-(+)-clenbuterol can be baseline separated and accurately analyzed with a linear range of 5-500 ng/g. Accuracies ranged from -11.9-13.0% for R-(-)-clenbuterol and -10.2-13.2% for S-(+)-clenbuterol, intra-day and inter-day precisions were between 0.7 and 6.1% for R-(-)-clenbuterol and 1.6-5.9% for S-(+)-clenbuterol. R/S ratios in edible tissues of pigs were all significantly lower than 1. CONCLUSIONS The analytical method has good specificity and robustness in determination of R-(-)-clenbuterol and S-(+)-clenbuterol in animal tissues, and can be used as a routine analysis method for food safety and doping control. There is a significant difference in R/S ratio between pig feeding tissues and pharmaceutical preparations (racemate with R/S ratio of 1), which makes it possible to identify the source of clenbuterol in doping control and investigation.
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Affiliation(s)
- Jianli Zhang
- China Institute of Sport Science, No.11 Stadium Road, Dongcheng District, Beijing 100061, China.
| | - Jianghai Lu
- China Anti-Doping Agency, 1st Anding Road, Chaoyang District, Beijing 100029, China
| | - Yinong Zhang
- China Anti-Doping Agency, 1st Anding Road, Chaoyang District, Beijing 100029, China
| | - Yan Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1st Xiannongtan Street, Xicheng District, Beijing 100050, China
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9
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Broberg MN, Knych H, Bondesson U, Pettersson C, Tidstedt B, Stanley S, Thevis M, Hedeland M. Equine in vivo metabolite profiling of the selective androgen receptor modulator LGD-3303 for doping control. J Pharm Biomed Anal 2023; 233:115468. [PMID: 37224728 DOI: 10.1016/j.jpba.2023.115468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/27/2023] [Accepted: 05/17/2023] [Indexed: 05/26/2023]
Abstract
LGD-3303 is a Selective Androgen Receptor Modulator (SARM) that is prohibited in both equine and human sports due to its anabolic properties. The aim of this study was to investigate the equine in vivo metabolite profile of LGD-3303 and identify drug metabolites that can be suitable as new and improved analytical targets for equine doping control. This was performed by an oral administration of 0.05 mg·kg-1 LGD-3303 to horses, where blood and urine samples were collected up to 96 h after administration. The in vivo samples consisting of plasma, urine and hydrolyzed urine were analyzed utilizing ultra-high performance liquid chromatography hyphenated to a Q Exactive™ Orbitrap™ high resolution mass spectrometer with a heated electrospray ionization source. A total of eight metabolites of LGD-3303 were tentatively identified, including one carboxylated and several hydroxylated metabolites in combination with glucuronic acid conjugates. A monohydroxylated metabolite is suggested as an analytical target for doping control analysis of plasma and urine after hydrolysis with β-glucuronidase, due to the high intensity and prolonged detection time in comparison to parent LGD-3303.
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Affiliation(s)
- Malin Nilsson Broberg
- Department of Medicinal Chemistry, Uppsala University, Box 574, 75123 Uppsala Sweden
| | - Heather Knych
- Kenneth L. Maddy Equine Analytical Pharmacology Laboratory, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Ulf Bondesson
- Department of Medicinal Chemistry, Uppsala University, Box 574, 75123 Uppsala Sweden
| | - Curt Pettersson
- Department of Medicinal Chemistry, Uppsala University, Box 574, 75123 Uppsala Sweden
| | - Börje Tidstedt
- Department of Chemistry, Environment and Feed Hygiene, National Veterinary Institute (SVA), 75189 Uppsala, Sweden
| | - Scott Stanley
- Gluck Equine Research Center, University of Kentucky, Lexington, KY 40546, USA
| | - Mario Thevis
- Institute of Biochemistry, Center for Preventive Doping Research, German Sport University, 50933 Cologne, Germany
| | - Mikael Hedeland
- Department of Medicinal Chemistry, Uppsala University, Box 574, 75123 Uppsala Sweden.
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10
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González-Rubio S, Caballero-Casero N, Ballesteros-Gómez A, Cuervo D, Muñoz G, Rubio S. Supramolecular solvents for making comprehensive liquid-liquid microextraction in multiclass screening methods for drugs of abuse in urine based on liquid chromatography-high resolution mass spectrometry. J Chromatogr A 2023; 1701:464061. [PMID: 37187096 DOI: 10.1016/j.chroma.2023.464061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 05/05/2023] [Accepted: 05/08/2023] [Indexed: 05/17/2023]
Abstract
Multiclass screening methods involving hundreds of structurally unrelated compounds are becoming essential in many control labs and research areas. Accurate mass screening of a theoretically unlimited number of chemicals can be undertaken using liquid chromatography coupled to high resolution mass spectrometry (LCHRMS), but the lack of comprehensive sample treatments hinders this unlimited potential. In this research, the capability of supramolecular solvents (SUPRAS) for making comprehensive liquid-liquid microextraction (LLME) in multiclass screening methods based on LCHRMS was firstly explored. For this purpose, a SUPRAS made up of 1,2-hexanediol, sodium sulphate and water was synthesized directly in the urine and applied to compound extraction and interference removal in the screening of eighty prohibited substances in sports by LC-electrospray ionization-time of flight mass spectrometry. Selected substances included a wide range of polarities (log P from -2.4 to 9.2) and functionalities (e.g. alcohol, amine, amide, carboxyl, ether, ester, ketone, sulfonyl, etc.). No interfering peaks were observed for any of the 80 substances investigated. Around 84-93% of drugs were efficiently extracted (recoveries 70-120%) and 83-94% of the analytes did not show matrix effects (±20%) in the ten tested urines. Method detection limits for the drugs were in the interval 0.002-12.9 ng mL-1, which are in accordance with the Minimum Required Performance Levels values established by the World Anti-Doping Agency. The applicability of the method was evaluated by the screening of thirty-six blinded and anonymized urine samples, previously analyzed by gas or liquid chromatography-triple quadrupole. Seven of the samples lead to an adverse analytical finding in line with the results obtained by the conventional methods. This research proves that LLME based on SUPRAS constitutes an efficient, economic, and simple sample treatment in multiclass screening methods, an application that is unaffordable for conventional organic solvents.
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Affiliation(s)
- Soledad González-Rubio
- Department of Analytical Chemistry, Instituto Químico para la Energía y el Medioambiente, Marie Curie Building (Annex), Campus of Rabanales, Universidad de Córdoba, Córdoba 14071, Spain
| | - Noelia Caballero-Casero
- Department of Analytical Chemistry, Instituto Químico para la Energía y el Medioambiente, Marie Curie Building (Annex), Campus of Rabanales, Universidad de Córdoba, Córdoba 14071, Spain.
| | - Ana Ballesteros-Gómez
- Department of Analytical Chemistry, Instituto Químico para la Energía y el Medioambiente, Marie Curie Building (Annex), Campus of Rabanales, Universidad de Córdoba, Córdoba 14071, Spain
| | - Darío Cuervo
- Doping Control Laboratory. Institute of Health Carlos III, C/ Pintor el Greco S/N, Madrid 28040, Spain
| | - Gloria Muñoz
- Doping Control Laboratory. Institute of Health Carlos III, C/ Pintor el Greco S/N, Madrid 28040, Spain
| | - Soledad Rubio
- Department of Analytical Chemistry, Instituto Químico para la Energía y el Medioambiente, Marie Curie Building (Annex), Campus of Rabanales, Universidad de Córdoba, Córdoba 14071, Spain
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11
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Cloteau C, Dervilly G, Loup B, Delcourt V, Kaabia Z, Bagilet F, Groseille G, Dauriac K, Fisher S, Popot MA, Garcia P, Le Bizec B, Bailly-Chouriberry L. Performance assessment of an equine metabolomics model for screening a range of anabolic agents. Metabolomics 2023; 19:38. [PMID: 37027080 DOI: 10.1007/s11306-023-01985-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 03/04/2023] [Indexed: 04/08/2023]
Abstract
INTRODUCTION Despite their ban, Anabolic Androgenic Steroids (AAS) are considered as the most important threat for equine doping purposes. In the context of controlling such practices in horse racing, metabolomics has emerged as a promising alternative strategy to study the effect of a substance on metabolism and to discover new relevant biomarkers of effect. Based on the monitoring of 4 metabolomics derived candidate biomarkers in urine, a prediction model to screen for testosterone esters abuse was previously developed. The present work focuses on assessing the robustness of the associated method and define its scope of application. MATERIALS AND METHODS Several hundred urine samples were selected from 14 different horses of ethically approved administration studies involving various doping agents' (AAS, SARMS, β-agonists, SAID, NSAID) (328 urine samples). In addition, 553 urine samples from untreated horses of doping control population were included in the study. Samples were characterized with the previously described LC-HRMS/MS method, with the objective of assessing both its biological and analytical robustness. RESULTS The study concluded that the measurement of the 4 biomarkers involved in the model was fit for purpose. Further, the classification model confirmed its effectiveness in screening for testosterone esters use; and it demonstrated its ability to screen for the misuse of other anabolic agents, allowing the development of a global screening tool dedicated to this class of substances. Finally, the results were compared to a direct screening method targeting anabolic agents demonstrating complementary performances of traditional and omics approaches in the screening of anabolic agents in horses.
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Affiliation(s)
- C Cloteau
- LABERCA, ONIRIS, INRAE, 44300, Nantes, France.
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France.
| | - G Dervilly
- LABERCA, ONIRIS, INRAE, 44300, Nantes, France
| | - B Loup
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
| | - V Delcourt
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
| | - Z Kaabia
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
| | - F Bagilet
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
| | - G Groseille
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
| | - K Dauriac
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
| | - S Fisher
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
| | - M A Popot
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
| | - P Garcia
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
| | - B Le Bizec
- LABERCA, ONIRIS, INRAE, 44300, Nantes, France
| | - L Bailly-Chouriberry
- Laboratoire des Courses Hippiques (GIE-LCH), 91370, Verrières Le Buisson, France
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12
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Ishii H, Shibuya M, Kusano K, Sone Y, Kamiya T, Wakuno A, Ito H, Miyata K, Sato F, Kuroda T, Yamada M, Leung GNW. Generic approach for the discovery of drug metabolites in horses based on data-dependent acquisition by liquid chromatography high-resolution mass spectrometry and its applications to pharmacokinetic study of daprodustat. Anal Bioanal Chem 2022; 414:8125-8142. [PMID: 36181513 DOI: 10.1007/s00216-022-04347-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/14/2022] [Accepted: 09/20/2022] [Indexed: 11/27/2022]
Abstract
In drug metabolism studies in horses, non-targeted analysis by means of liquid chromatography coupled with high-resolution mass spectrometry with data-dependent acquisition (DDA) has recently become increasingly popular for rapid identification of potential biomarkers in post-administration biological samples. However, the most commonly encountered problem is the presence of highly abundant interfering components that co-elute with the target substances, especially if the concentrations of these substances are relatively low. In this study, we evaluated the possibility of expanding DDA coverage for the identification of drug metabolites by applying intelligently generated exclusion lists (ELs) consisting of a set of chemical backgrounds and endogenous substances. Daprodustat was used as a model compound because of its relatively lower administration dose (100 mg) compared to other hypoxia-inducible factor stabilizers and the high demand in the detection sensitivity of its metabolites at the anticipated lower concentrations. It was found that the entire DDA process could efficiently identify both major and minor metabolites (flagged beyond the pre-set DDA threshold) in a single run after applying the ELs to exclude 67.7-99.0% of the interfering peaks, resulting in a much higher chance of triggering DDA to cover the analytes of interest. This approach successfully identified 21 metabolites of daprodustat and then established the metabolic pathway. It was concluded that the use of this generic intelligent "DDA + EL" approach for non-targeted analysis is a powerful tool for the discovery of unknown metabolites, even in complex plasma and urine matrices in the context of doping control.
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Affiliation(s)
- Hideaki Ishii
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi, 320-0851, Japan.
- Department of Pharmaceutical Sciences, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan.
| | - Mariko Shibuya
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi, 320-0851, Japan
| | - Kanichi Kusano
- Veterinarian Section, Equine Department, Japan Racing Association, 6-11-1 Roppongi, Minato-ku, Tokyo, 105-0003, Japan
| | - Yu Sone
- Veterinarian Section, Equine Department, Japan Racing Association, 6-11-1 Roppongi, Minato-ku, Tokyo, 105-0003, Japan
| | - Takahiro Kamiya
- Equine Veterinary Clinic, Horse Racing School, Japan Racing Association, 835-1 Ne, Shiroi, Chiba, 270-1431, Japan
| | - Ai Wakuno
- Equine Veterinary Clinic, Horse Racing School, Japan Racing Association, 835-1 Ne, Shiroi, Chiba, 270-1431, Japan
| | - Hideki Ito
- Equine Veterinary Clinic, Horse Racing School, Japan Racing Association, 835-1 Ne, Shiroi, Chiba, 270-1431, Japan
| | - Kenji Miyata
- JRA Equestrian Park Utsunomiya Office, 321-4 Tokamicho, Utsunomiya, Tochigi, 320-0856, Japan
| | - Fumio Sato
- Clinical Veterinary Medicine Division, Equine Research Institute, Japan Racing Association, 1400-4, Shiba, Shimotsuke, Tochigi, 329-0412, Japan
| | - Taisuke Kuroda
- Clinical Veterinary Medicine Division, Equine Research Institute, Japan Racing Association, 1400-4, Shiba, Shimotsuke, Tochigi, 329-0412, Japan
| | - Masayuki Yamada
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi, 320-0851, Japan
| | - Gary Ngai-Wa Leung
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi, 320-0851, Japan
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13
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Arioli F, Gamberini MC, Pavlovic R, Di Cesare F, Draghi S, Bussei G, Mungiguerra F, Casati A, Fidani M. Quantification of cortisol and its metabolites in human urine by LC-MS n: applications in clinical diagnosis and anti- doping control. Anal Bioanal Chem 2022; 414:6841-6853. [PMID: 35915250 PMCID: PMC9436849 DOI: 10.1007/s00216-022-04249-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/09/2022] [Accepted: 07/22/2022] [Indexed: 11/08/2022]
Abstract
The objective of the current research was to develop a liquid chromatography-MSn (LC-MSn) methodology for the determination of free cortisol and its 15 endogenous metabolites (6β-hydroxycortisol, 20α-dihydrocortisol, 20α-dihydrocortisone, 20-β-dihydrocortisol, 20β-dihydrocortisone, prednisolone, cortisone, α-cortolone, β-cortolone, allotetrahydrocortisol, 5α-dihydrocortisol, tetrahydrocortisol, allotetrahydrocortisone, 5β-dihydrocortisol, tetrahydrocortisone) in human urine. Due to its optimal performance, a linear ion trap operating in ESI negative ion mode was chosen for the spectrometric analysis, performing MS3 and MS4 experiments. The method was validated for limit of detection (LOD) and limit of quantification (LOQ) (0.01 ng mL−1 and 0.05 ng mL−1, for all compounds, respectively), intra- and inter-day precision (CV = 1.4–9.2% and CV = 3.6–10.4%, respectively), intra- and inter-day accuracy (95–110%), extraction recovery (65–95%), linearity (R2 > 0.995), and matrix effect that was absent for all molecules. Additionally, for each compound, the percentage of glucuronated conjugates was estimated. The method was successfully applied to the urine (2 mL) of 50 healthy subjects (25 males, 25 females). It was also successfully employed on urine samples of two patients with Cushing syndrome and one with Addison’s disease. This analytical approach could be more appropriate than commonly used determination of urinary free cortisol collected in 24-h urine. The possibility of considering the differences and relationship between cortisol and its metabolites allows analytical problems related to quantitative analysis of cortisol alone to be overcome. Furthermore, the developed method has been demonstrated as efficient for antidoping control regarding the potential abuse of corticosteroids, which could interfere with the cortisol metabolism, due to negative feedback on the hypothalamus-hypophysis-adrenal axis. Lastly, this method was found to be suitable for the follow-up of prednisolone that was particularly important considering its pseudo-endogenous origin and correlation with cortisol metabolism.
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Affiliation(s)
- Francesco Arioli
- Department of Veterinary Medicine and Animal Science, University of Milan, Via dell'Università 6, 26900, Lodi, LO, Italy
| | - Maria Cristina Gamberini
- Department of Life Science, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy
| | - Radmila Pavlovic
- Department of Veterinary Medicine and Animal Science, University of Milan, Via dell'Università 6, 26900, Lodi, LO, Italy.
| | - Federica Di Cesare
- Department of Veterinary Medicine and Animal Science, University of Milan, Via dell'Università 6, 26900, Lodi, LO, Italy
| | - Susanna Draghi
- Department of Veterinary Medicine and Animal Science, University of Milan, Via dell'Università 6, 26900, Lodi, LO, Italy
| | - Giulia Bussei
- UNIRELAB Srl, Via Gramsci 70, 20019, Settimo Milanese, MI, Italy
| | | | - Alessio Casati
- Department of Veterinary Medicine and Animal Science, University of Milan, Via dell'Università 6, 26900, Lodi, LO, Italy
| | - Marco Fidani
- UNIRELAB Srl, Via Gramsci 70, 20019, Settimo Milanese, MI, Italy
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Ishii H, Leung GNW, Yamashita S, Nagata SI, Kushiro A, Sakai S, Toju K, Okada J, Kawasaki K, Kusano K, Kijima-Suda I. Comprehensive metabolic study of nicotine in equine plasma and urine using liquid chromatography/high-resolution mass spectrometry for the identification of unique biomarkers for doping control. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1190:123100. [PMID: 35032890 DOI: 10.1016/j.jchromb.2022.123100] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/07/2021] [Accepted: 01/03/2022] [Indexed: 10/19/2022]
Abstract
Nicotine is classified as a stimulant, and its use is banned in horse racing and equestrian sports by the International Federation of Horseracing Authorities and the Fédération Équestre Internationale, respectively. Because nicotine is a major alkaloid of tobacco leaves, there is a potential risk that doping control samples may be contaminated by tobacco cigarettes or smoke during sample collection. In order to differentiate the genuine doping and sample contamination with tobacco leaves, it is necessary to monitor unique metabolites as biomarkers for nicotine administration and intake. However, little is known about the metabolic fate of nicotine in horses. This is the first report of comprehensive metabolism study of nicotine in horses. Using liquid chromatography/electrospray ionization high-resolution mass spectrometry, we identified a total of 17 metabolites, including one novel horse-specific metabolite (i.e., 4-hydroxy-4-(3-pyridyl)-N-methylbutanamide), in post-administration urine samples after nasoesophageal administration of nicotine to three thoroughbred mares; eight of these compounds were confirmed based on reference standards. Among these metabolites, N-hydroxymethylnorcotinine was the major urinary metabolite in equine, but it could only be tentatively identified by mass spectral interpretation due to the lack of reference material. In addition, we developed simultaneous quantification methods for the eight target analytes in plasma and urine, and applied them to post-administration samples to establish elimination profiles of nicotine and its metabolites. The quantification results revealed that trans-3'-hydroxycotinine could be quantified for the longest period in both plasma (72 h post-administration) and urine (96 h post-administration). Therefore, this metabolite is the most appropriate monitoring target for nicotine exposure for the purpose of doping control due to its long detection times and the availability of its reference material. Further, we identified trans-3'-hydroxycotinine as a unique biomarker allowing differentiation between nicotine administration and sample contamination with tobacco leaves.
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Affiliation(s)
- Hideaki Ishii
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi 320-0851, Japan; Department of Pharmaceutical Sciences, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574, Japan.
| | - Gary Ngai-Wa Leung
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi 320-0851, Japan
| | - Shozo Yamashita
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi 320-0851, Japan
| | - Shun-Ichi Nagata
- Genetic Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi 320-0851, Japan
| | - Asuka Kushiro
- Equine Research Institute, Research Planning & Coordination Division, JRA, 1400-4, Shiba, Shimotsuke, Tochigi 329-0412, Japan
| | - Satoshi Sakai
- Race Horse Hospital, Miho Training Center, JRA, 2500-2, Oaza-Mikoma, Miho-mura, Inashiki-gun, Ibaraki 300-0493, Japan
| | - Kota Toju
- Race Horse Hospital, Miho Training Center, JRA, 2500-2, Oaza-Mikoma, Miho-mura, Inashiki-gun, Ibaraki 300-0493, Japan
| | - Jun Okada
- Veterinarian Section, Equine Department, JRA, 6-11-1 Roppongi, Minato-ku, Tokyo 105-0003, Japan
| | - Kazumi Kawasaki
- Veterinarian Section, Equine Department, JRA, 6-11-1 Roppongi, Minato-ku, Tokyo 105-0003, Japan
| | - Kanichi Kusano
- Race Horse Hospital, Ritto Training Center, JRA, 1028, Misono, Ritto, Shiga 520-3085, Japan
| | - Isao Kijima-Suda
- Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi 320-0851, Japan
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15
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de Araujo ALD, Nunes IKDC, Sardela VF, Pereira HMG, Cabral LM, Anselmo CDS. Is zebrafish (Danio rerio) water tank model applicable for the assessment of glucocorticoids metabolism? The budesonide assessment. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1179:122826. [PMID: 34225244 DOI: 10.1016/j.jchromb.2021.122826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 05/26/2021] [Accepted: 06/05/2021] [Indexed: 10/21/2022]
Abstract
Knowledge of the metabolic profile is essential for doping control analysis in sport since most drugs are excreted after an elaborate biotransformation process. Currently, Zebrafish Water Tank (ZWT) model has been applied to investigate the metabolism of different doping agents. Nevertheless, the class of glucocorticoids has not been subjected to this model for metabolism studies. In the present work, budesonide (BUD) was applied as a pilot to investigate the metabolic pathways of glucocorticoids in the ZWT model. The BUD biotransformation in ZWT model was compared to the described metabolism in humans. Samples from ZWT experiments were collected after BUD administration and analyzed by Liquid Chromatography coupled to High Resolution Mass Spectrometry (LC-HRMS). Following the identification and characterization of all significant metabolites described for humans, it was observed that the ZWT was able to produce in a relevant amount the main target for doping control purposes: the 6β-hydroxy BUD. In addition, prior knowledge about the lack of butyrylcholinesterase activity in the zebrafish organism was considered for the evaluation for the formation of the 16α-hydroxy prednisolone, the most intense BUD metabolite in human urine. Biotransformation of BUD by ZWT focused on metabolites with the acetal fraction preserved, including the intermediate metabolite for the 16α-hydroxy prednisolone pathway. However,analternative metabolic pathway for the complete biotransformation of the 16α-hydroxy prednisolone intermediate was not observed, leading to the absence of the major human metabolite in the ZWT model. The findings reported in this study elucidate for the first time the application and limitations of the ZWT model to evaluate the metabolism of other glucocorticoids.
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Affiliation(s)
- Amanda Lessa Dutra de Araujo
- Federal University of Rio de Janeiro, Institute of Chemistry, Laboratório Brasileiro de Controle de Dopagem (LBCD-LADETEC), Av. Horácio Macedo, 1281, bloco C - Cidade Universitária, Rio de Janeiro, RJ 21941-598, Brazil.
| | - Isabelle Karine da Costa Nunes
- Federal University of Rio de Janeiro, Institute of Chemistry, Laboratório Brasileiro de Controle de Dopagem (LBCD-LADETEC), Av. Horácio Macedo, 1281, bloco C - Cidade Universitária, Rio de Janeiro, RJ 21941-598, Brazil
| | - Vinicius Figueiredo Sardela
- Federal University of Rio de Janeiro, Institute of Chemistry, Laboratório Brasileiro de Controle de Dopagem (LBCD-LADETEC), Av. Horácio Macedo, 1281, bloco C - Cidade Universitária, Rio de Janeiro, RJ 21941-598, Brazil
| | - Henrique Marcelo Gualberto Pereira
- Federal University of Rio de Janeiro, Institute of Chemistry, Laboratório Brasileiro de Controle de Dopagem (LBCD-LADETEC), Av. Horácio Macedo, 1281, bloco C - Cidade Universitária, Rio de Janeiro, RJ 21941-598, Brazil
| | - Lucio Mendes Cabral
- Federal University of Rio de Janeiro, Department of Pharmaceutics, Laboratório de Tecnologia Industrial Farmacêutica (LabTIF), Av. Carlos Chagas Filho, 373 - Cidade Universitária, Rio de Janeiro, RJ 21941-590, Brazil
| | - Carina de Souza Anselmo
- Federal University of Rio de Janeiro, Institute of Chemistry, Laboratório Brasileiro de Controle de Dopagem (LBCD-LADETEC), Av. Horácio Macedo, 1281, bloco C - Cidade Universitária, Rio de Janeiro, RJ 21941-598, Brazil
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16
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Honesova L, Van Eenoo P, Polet M. A uniform sample preparation procedure for gas chromatography combustion isotope ratio mass spectrometry for all human doping control relevant anabolic steroids using online 2/3-dimensional liquid chromatography fraction collection. Anal Chim Acta 2021; 1168:338610. [PMID: 34051993 DOI: 10.1016/j.aca.2021.338610] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/29/2021] [Accepted: 05/03/2021] [Indexed: 11/21/2022]
Abstract
Androgenic anabolic steroids are the most misused substances in sports because of their performance-enhancing effects. Often synthetic analogues of endogenously present steroids are administered. To determine their endogenous or exogenous origin, Gas Chromatography Combustion Isotope Ratio Mass Spectrometry (GC-C-IRMS) is used in the field of doping control. Compounds subjected to IRMS analysis must be interference-free, with liquid chromatography fraction collection (HPLC-FC) being the crucial clean-up step. However, this clean-up is challenging, particularly for compounds present at low concentrations in samples with pronounced matrix effects. The compounds of interests for IRMS analyses in doping control are testosterone (T) and its main metabolites (androsterone, etiocholanolone, 5α-androstane-3α,17β-diol, 5β-androstane-3α,17β-diol), epitestosterone, 19-norandrosterone (19-NA), boldenone (B) and its main metabolite (BM), formestane (F) and 6αOH-androstenedione (6aOHADION). Currently, the available methods only deal with a selection of the above-mentioned compounds. Some of these compounds (e.g., 19-NA, B, BM, 6aOHADION) are present in very low concentrations, requiring an extensive and dedicated sample clean-up, and this makes it challenging to develop a universal clean-up procedure. Many of these methods require different and multiple offline HPLC-FC setups, which are labour-intensive and time-consuming. That is problematic during, e.g., large sports events, where reporting time is limited (e.g., 72 h). Therefore, in the current work, we developed a uniform online 2D/3D HPLC-FC method, capable of purifying all relevant target compounds in a single run, leading to the fastest clean-up procedure so far (i.e., 31 min for T and its main metabolites; 46 min for 19-NA, F and 6aOHADION; 48 min for B and BM).
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Judák P, Esposito S, Coppieters G, Van Eenoo P, Deventer K. Doping control analysis of small peptides: A decade of progress. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1173:122551. [PMID: 33848801 DOI: 10.1016/j.jchromb.2021.122551] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 02/06/2023]
Abstract
Small peptides are handled in the field of sports drug testing analysis as a separate group doping substances. It is a diverse group, which includes but is not limited to growth hormone releasing-factors and gonadotropin-releasing hormone analogues. Significant progress has been achieved during the past decade in the doping control analysis of these peptides. In this article, achievements in the application of liquid chromatography-mass spectrometry-based methodologies are reviewed. To meet the augmenting demands for analyzing an increasing number of samples for the presence of an increasing number of prohibited small peptides, testing methods have been drastically simplified, whilst their performance level remained constant. High-resolution mass spectrometers have been installed in routine laboratories and became the preferred detection technique. The discovery and implementation of metabolites/catabolites in testing methods led to extended detection windows of some peptides, thus, contributed to more efficient testing in the anti-doping community.
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Affiliation(s)
- Péter Judák
- Department of Diagnostic Sciences, Doping Control Laboratory, Ghent University, Zwijnaarde, Belgium.
| | - Simone Esposito
- ADME/DMPK Department, Drug Discovery Division, IRBM S.p.A, Pomezia, Rome, Italy
| | - Gilles Coppieters
- Department of Diagnostic Sciences, Doping Control Laboratory, Ghent University, Zwijnaarde, Belgium
| | - Peter Van Eenoo
- Department of Diagnostic Sciences, Doping Control Laboratory, Ghent University, Zwijnaarde, Belgium
| | - Koen Deventer
- Department of Diagnostic Sciences, Doping Control Laboratory, Ghent University, Zwijnaarde, Belgium
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18
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Matos RR, Anselmo CDS, Sardela VF, Pereira HMG. Phase II stanozolol metabolism study using the zebrafish water tank (ZWT) model. J Pharm Biomed Anal 2021; 195:113886. [PMID: 33465533 DOI: 10.1016/j.jpba.2020.113886] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 12/22/2020] [Accepted: 12/29/2020] [Indexed: 01/10/2023]
Abstract
Stanozolol (STAN) is an androgen anabolic steroid often misused in sports competitions and prohibited at all times by the World Anti-Doping Agency (WADA). It can be long term detected by the analysis of human urine for traces of intact glucuronide metabolites. The Zebrafish Water Tank (ZWT) experimental setup can produce phase I STAN metabolites. In the present study, we investigated the in vivo phase II metabolism of STAN through the ZWT model to determine whether the ZWT produces metabolites relevant for doping control. We added STAN to a 200 mL recipient containing eight fish at 32 ± 1 °C. We analyzed the noninvasive samples (recipient water) both with and without pretreatment using Liquid Chromatography coupled with High-Resolution Mass Spectrometry (LC-HRMS/MS) in positive ionization mode. Our data show that four hydroxylated-sulfate and four hydroxylated-glycoconjugate metabolites were formed, two of the last ones being 3'OH-STAN-Glucuronide and 16β-OH-STAN-Glucuronide. Additionally, two STAN-Glucuronide derivatives were produced: one was confirmed to be 17epi-STAN-N-Glucuronide, and the other was presumed to be STAN-O-Glucuronide. After eight hours of the experiment, STAN-O-Glucuronide was the most intense phase II metabolite produced. The accumulation curves suggest that high concentrations of fish and substrate in water are required to form phase II metabolites.
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Affiliation(s)
- Rebecca Rodrigues Matos
- Instituto de Química, LBCD-LADETEC, Universidade Federal do Rio de Janeiro, Avenida Horácio Macedo, no. 1281, Polo de Química, bloco C, Cidade Universitária, Rio de Janeiro, RJ 21941-598, Brazil.
| | - Carina de Souza Anselmo
- Instituto de Química, LBCD-LADETEC, Universidade Federal do Rio de Janeiro, Avenida Horácio Macedo, no. 1281, Polo de Química, bloco C, Cidade Universitária, Rio de Janeiro, RJ 21941-598, Brazil
| | - Vinícius Figueiredo Sardela
- Instituto de Química, LBCD-LADETEC, Universidade Federal do Rio de Janeiro, Avenida Horácio Macedo, no. 1281, Polo de Química, bloco C, Cidade Universitária, Rio de Janeiro, RJ 21941-598, Brazil
| | - Henrique Macelo Gualberto Pereira
- Instituto de Química, LBCD-LADETEC, Universidade Federal do Rio de Janeiro, Avenida Horácio Macedo, no. 1281, Polo de Química, bloco C, Cidade Universitária, Rio de Janeiro, RJ 21941-598, Brazil
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19
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Ahmadi F, Rahmani N. Physical Separation of Amphiprotic-Polar AproticS for Simultaneous Extraction and Clean-up of Clomiphene from Plasma before Liquid Chromatographic Analysis. Iran J Pharm Res 2020; 18:1212-1223. [PMID: 32641933 PMCID: PMC6934962 DOI: 10.22037/ijpr.2019.1100771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An efficient and quantitative two phase freezing (TPF) method coupled with high performance liquid chromatography and UV-Vis detector was developed for the extraction, clean up, and determination of clomiphene citrate (CLC) in plasma samples. The separation of two miscible solvents by TPF method permits that the CLC was efficiently removed from proteins and transferred into the relative aprotic dipolar organic phase and in consequence, gave a higher recovery. The TPF method was compared to conventional liquid-liquid extraction and it gave more clean solution with better reproducibility. Linear range, limit of detection, and limit of quantification for CLC in plasma were obtained in the range of 0.06-18, 0.02, and 0.06 µg mL-1, respectively. The intraday and interday reproducibility for concentration of 1.0 µg mL-1 (%RSD) were 3.2% and 4.6%, respectively. In addition, the trueness, ruggedness, and reality of TPF were assessment. Finally, several real plasma samples were successfully analyzed using the developed method.
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Affiliation(s)
- Farhad Ahmadi
- Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Medicinal Chemistry, School of Pharmacy-International Campus, Iran University of Medical Sciences, Tehran, Iran
| | - Nilofar Rahmani
- Department of Medicinal Chemistry, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Islamic Republic of Iran
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20
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Wong ASY, Choi TLS, Kwok KY, Wong JKY, Wan TSM, Ho ENM. Doping control analysis of antipsychotics and other prohibited substances in equine plasma by liquid chromatography/tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1147:122132. [PMID: 32417678 DOI: 10.1016/j.jchromb.2020.122132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 01/06/2023]
Abstract
Antipsychotics are banned substances and considered by the Fédération Equestrian Internationale (FEI) to have no legitimate use in equine medicine and/or have a high potential for abuse. These substances are also prohibited in horseracing according to Article 6 of the International Agreement on Breeding, Racing and Wagering (published by the International Federation of Horseracing Authorities). Over the years, antipsychotics have been abused or misused in equestrian sports and horseracing. A recent review of literature shows that there is yet a comprehensive screening method for antipsychotics in equine samples. This paper describes an efficient liquid chromatography/tandem mass spectrometry (LC/MS/MS) method for the simultaneous detection of over 80 antipsychotics and other prohibited substances at sub-parts-per-billion (ppb) to low-ppb levels in equine plasma after solid-phase extraction (SPE).
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Affiliation(s)
- April S Y Wong
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, N.T., Hong Kong, China.
| | - Timmy L S Choi
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, N.T., Hong Kong, China
| | - Karen Y Kwok
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, N.T., Hong Kong, China
| | - Jenny K Y Wong
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, N.T., Hong Kong, China
| | - Terence S M Wan
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, N.T., Hong Kong, China
| | - Emmie N M Ho
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, N.T., Hong Kong, China.
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21
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Liang Y, Liu J, Zhong Q, Huang T, Zhou T. An automatic online solid-phase dehydrate extraction-ultra-high performance supercritical fluid chromatography-tandem mass spectrometry system using a dilution strategy for the screening of doping agents in human urine. Anal Chim Acta 2020; 1101:184-192. [PMID: 32029110 DOI: 10.1016/j.aca.2019.12.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 12/02/2019] [Accepted: 12/04/2019] [Indexed: 12/30/2022]
Abstract
An automatic online solid-phase dehydrate extraction (SPDE)-ultra-high performance supercritical fluid chromatography (UHPSFC)-MS/MS system was developed in this study, in which the automatic SPDE procedure was coupled with UHPSFC to allow UHPSFC to analyze aqueous samples directly. Moreover, a pre-column dilution strategy was employed, which focused the analytes in strong desorption solvent on the column head and helped to obtain narrow and symmetric peaks. The online SPDE-UHPSFC-MS/MS system was firstly applied to the screening of 45 prohibited substances in human urine for doping control, during which all the mechanisms and features of the online system were fully studied. The majority (91%) of the target compounds achieved weak matrix effects (80-120%), indicating that the online method was accurate and reliable thanks to the SPDE procedure and efficient UHPSFC separation. Owing to the reduction of the matrix effects, large volume injection and the pre-column dilution, the online system could achieve high sensitivity with the LODs ranging from 0.0380 ng L-1 to 1.24 μg L-1. Under the optimized conditions, the extraction recoveries of 66% target analytes were more than 50%. All the target compounds showed good linearity with linear correlation coefficients higher than 0.9928. The accuracy values of all the spiked prohibited substances were within 80.8-119.7%, while the RSDs% for the intra-/inter-day precision were within 10.8% and 15.4%. Compared with the dilute-and-shoot-ultra-high performance liquid chromatography-MS/MS method, in which the urine samples were simply diluted before analyzing, this online method was superior in sensitivity and reducing matrix effects, which demonstrated its utility in doping control. Compared with the previously reported online SPE-SFC system, the online SPDE-UHPSFC-MS/MS system showed advantages in automation, efficiency, sensitivity and chromatographic performance. In summary, the online SPDE-UHPSFC-MS/MS system is capable of analyzing complex aqueous samples.
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Affiliation(s)
- Yanshan Liang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China
| | - Jiaqi Liu
- Shimadzu (China) Corporation, Guangzhou Branch, 510010, China
| | - Qisheng Zhong
- Shimadzu (China) Corporation, Guangzhou Branch, 510010, China
| | - Taohong Huang
- Shimadzu (China) Corporation, Shanghai Branch, 200233, China
| | - Ting Zhou
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, China.
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22
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Genangeli M, Caprioli G, Cortese M, Laus F, Petrelli R, Ricciutelli M, Sagratini G, Sartori S, Vittori S. Simultaneous quantitation of 9 anabolic and natural steroidal hormones in equine urine by UHPLC-MS/MS triple quadrupole. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1117:36-40. [PMID: 30991204 DOI: 10.1016/j.jchromb.2019.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/27/2019] [Accepted: 04/01/2019] [Indexed: 11/15/2022]
Abstract
A new fast and easy analytical procedure for the simultaneous detection and quantification of 9 anabolic steroids (deslorelin, dexamethasone sodium phosphate, prednisolone, methylprednisolone, stanozolol, boldenone, nandrolone, dexamethasone isonicotinate and altrenogest) in horse urine for doping control have been developed by using the ultra-high-performance liquid chromatography coupled with tandem mass spectrometry technique (UHPLC-MS/MS). A total amount of 400 μl of sample was evaporated, restored and injected in the UHPLC-MS/MS. The proposed method was fully validated showing a recovery higher than 89.12% and a coefficient of variation lower than 6.02%. The correlation coefficients range of the analyzed compound's calibration curves was 0.9955-0.9997, and the limits of detection and quantification were in the range of 0.1 and 0.25 μg/l, respectively.
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Affiliation(s)
| | | | - Manuela Cortese
- School of Pharmacy, University of Camerino, Camerino, Italy.
| | - Fulvio Laus
- School of Biosciences and Veterinary Medicine, University of Camerino, Italy
| | | | | | | | | | - Sauro Vittori
- School of Pharmacy, University of Camerino, Camerino, Italy
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23
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Reichel C, Gmeiner G, Reihlen P, Thevis M, Schänzer W. SARCOSYL-PAGE: Optimized Protocols for the Separation and Immunological Detection of PEGylated Proteins. Methods Mol Biol 2019; 1855:131-149. [PMID: 30426415 DOI: 10.1007/978-1-4939-8793-1_14] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
PEGylation of recombinant proteins and synthetic peptides aims to generate biopharmaceuticals with altered physical properties. The modification may lead to a prolonged serum half-life caused by decreased receptor-mediated endocytosis and/or delay in renal clearance caused by the increased hydrodynamic volume of the pharmaceutical. MIRCERA, a PEGylated recombinant erythropoietin (rhEPO) used in the treatment of anemia due to chronic kidney disease, has also been abused by athletes as performance-enhancing drug. While it can be detected by sodium dodecylsulfate polyacrylamide gel electrophoresis (SDS-PAGE) and immunoblotting, the sensitivity of the test is significantly lower compared to other epoetins. By replacing SDS with sarcosyl in the sample and running buffers, the interaction between SDS and the PEG group of the protein no longer reduces the affinity of the monoclonal anti-EPO antibody (clone AE7A5) to the protein chain. Contrary to SDS, sarcosyl only binds to the amino acid chain of the PEGylated protein and thus leads to a sharper electrophoretic band and enhanced antibody binding. While the method was originally developed for anti-doping purposes, it may also be useful for the electrophoretic separation and immunological detection of other PEGylated proteins. Protocols for urine and serum are presented. They are also applicable for the general detection of EPO-based erythropoiesis-stimulating agents (ESA) in these matrices.
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Affiliation(s)
- Christian Reichel
- Doping Control Laboratory, Seibersdorf Labor GmbH, Seibersdorf, Austria.
| | - Günter Gmeiner
- Doping Control Laboratory, Seibersdorf Labor GmbH, Seibersdorf, Austria
| | - Philipp Reihlen
- Institute of Biochemistry, German Sport University Cologne, Cologne, Germany
| | - Mario Thevis
- Institute of Biochemistry, German Sport University Cologne, Cologne, Germany
| | - Wilhelm Schänzer
- Institute of Biochemistry, German Sport University Cologne, Cologne, Germany
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24
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Rogol AD. rhGH Abuse for Sports Performance. Pediatr Endocrinol Rev 2018; 16:142-149. [PMID: 30378792 DOI: 10.17458/per.vol16.2018.r.rhghabusesportsperformance] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Doping is at least as old as the ancient Olympics. Substances taken to improve athletic performance ranged from stimulants to hallucinogenic plant substances, but more recently include anabolic agents. Recombinant human growth hormone, rhGH, is one agent with a relatively short history of use, but few data to unequivocally show that it actually improves performance. However, rhGH has therapeutic use for those GH deficient and the concept of a therapeutic use exemption for those with documented deficiency is outlined along with doping control methods. The athlete's biological passport, a document with all of the analytical data from an athlete, helps in doping control because any one individual will vary for any analyte over a more narrow range than that for a "normal" control population.
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Affiliation(s)
- Alan D Rogol
- Professor, Emeritus, Department of Pediatrics, University of Virginia, Charlottesville, VA, USA, E-mail:
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25
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Barcelo B, Noce V, Gomila I. Building Bridges between Clinical and Forensic Toxicology Laboratories. Curr Pharm Biotechnol 2018; 19:99-112. [PMID: 29745329 DOI: 10.2174/1389201019666180509163603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 11/15/2017] [Accepted: 03/30/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Clinical and forensic toxicology can be defined as two disciplines involving the detection, identification and measurement of xenobiotics in biological and non-biological samples to assist in the diagnosis, treatment, prognosis and prevention of poisonings and to disclose causes and contributory causes of fatal intoxications, respectively. OBJECTIVE This article explores the close connections between clinical and forensic toxicology in overlapping areas of interest. METHODS An update has been carried out of the following seven areas of interest in analytical toxicology: doping control, Sudden Cardiac Death (SCD), brain death, Sudden Infant Death Syndrome (SIDS) and Munchausen Syndrome by Proxy (MSBP), prenatal exposure to drugs and Fetal Alcohol Syndrome (FAS), Drug-Facilitated Crimes (DFC) and intoxications by new psychoactive substances (NPS). RESULTS While issues such as SCD, SIDS or doping control are investigated mainly in forensic laboratories, others such as prenatal exposure to drugs or FAS are mainly treated in clinical laboratories. On the other hand, areas such MSBP, DFC or the intoxications by NPS are of interest in both laboratories. Some of these topics are initially treated in hospital emergency departments, involving clinical laboratories and sometimes lately derived to forensic laboratories. Conversely, cases with initial medicallegal implications and fatalities are directly handled by forensic toxicology, but may trigger further studies in the clinical setting. CONCLUSION Many areas of common interest between clinical and forensic laboratories are building bridges between them. The increasing relationships are improving the growth, the reliability and the robustness of both kinds of laboratories.
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Affiliation(s)
- Bernardino Barcelo
- Clinical Toxicology Unit, Clinical Analysis Department, Hospital Universitari Son Espases, Balearic Islands Health Research Institute (IdISBa), Palma de Mallorca, Spain
| | - Valeria Noce
- Department for Anti-Drug Policies (DPA); Rome, Italy
| | - Isabel Gomila
- Clinical Analysis Department, Hospital Universitari Son Llatzer, Balearic Islands Health Research Institute (IdISBa), Palma de Mallorca, Spain
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26
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Judák P, Van Eenoo P, Deventer K. Utilizing ELISA-plate based immunopurification and liquid chromatography-tandem mass spectrometry for the urinary detection of short- and long acting human insulin analogues. J Pharm Biomed Anal 2018; 153:76-81. [PMID: 29462782 DOI: 10.1016/j.jpba.2018.02.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 02/08/2018] [Accepted: 02/09/2018] [Indexed: 12/15/2022]
Abstract
The measurement of human insulin and its synthetic analogues in biological matrices has become increasingly important not only in clinical fields but also in doping control. The use of insulin and its analogues have been included in the list of prohibited substances published by the World Anti-Doping Agency (WADA). This study describes a qualitative method for detection of insulin analogues (lispro, aspart, glulisine, glargine, degludec, detemir) in human urine. The sample preparation consists of a preconcentration step using ultrafiltration followed by an immunoaffinity extraction with an antibody precoated ELISA plate. The obtained extracts are analyzed by conventional high-performance liquid chromatography-electrospray tandem mass spectrometry (LC-ESI-MS/MS). The limits of detection range between 10 pg/ml and 150 pg/ml. The applicability of the method was proven by the analysis of real urine samples obtained from diabetic patients treated with synthetic insulin analogues.
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Affiliation(s)
- Péter Judák
- Ghent University, Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Technologiepark 30 B, B-9052, Zwijnaarde, Belgium.
| | - Peter Van Eenoo
- Ghent University, Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Technologiepark 30 B, B-9052, Zwijnaarde, Belgium
| | - Koen Deventer
- Ghent University, Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Technologiepark 30 B, B-9052, Zwijnaarde, Belgium
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27
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Judák P, Van Eenoo P, Deventer K. Adsorption effects of the doping relevant peptides Insulin Lispro, Synachten, TB-500 and GHRP 5. Anal Biochem 2017; 537:69-71. [PMID: 28887173 DOI: 10.1016/j.ab.2017.09.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 09/01/2017] [Accepted: 09/04/2017] [Indexed: 01/09/2023]
Abstract
The tendency of peptides to adsorb to surfaces can raise a concern in variety of analytical fields where the qualitative/quantitative measurement of low concentration analytes (ng/mL-pg/mL) is required. To demonstrate the importance of using the optimal glassware/plasticware, four doping relevant model peptides (GHRP 5, TB-500, Insulin Lispro, Synachten) were chosen and their recovery from various surfaces were evaluated. Our experiments showed that choosing expensive consumables with low-bind characteristics is not beneficial in all cases. A careful selection of the consumables based on the evaluation of the physico/chemical features of the peptide is recommended.
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Affiliation(s)
- Péter Judák
- Ghent University, Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Technologiepark 30 B, B-9052 Zwijnaarde, Belgium.
| | - Peter Van Eenoo
- Ghent University, Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Technologiepark 30 B, B-9052 Zwijnaarde, Belgium
| | - Koen Deventer
- Ghent University, Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Technologiepark 30 B, B-9052 Zwijnaarde, Belgium
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28
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Judák P, Grainger J, Goebel C, Van Eenoo P, Deventer K. DMSO Assisted Electrospray Ionization for the Detection of Small Peptide Hormones in Urine by Dilute-and-Shoot-Liquid-Chromatography-High Resolution Mass Spectrometry. J Am Soc Mass Spectrom 2017; 28:1657-1665. [PMID: 28425052 DOI: 10.1007/s13361-017-1670-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/16/2017] [Accepted: 03/19/2017] [Indexed: 06/07/2023]
Abstract
The mobile phase additive (DMSO) has been described as a useful tool to enhance electrospray ionization (ESI) of peptides and proteins. So far, this technique has mainly been used in proteomic/peptide research, and its applicability in a routine clinical laboratory setting (i.e., doping control analysis) has not been described yet. This work provides a simple, easy to implement screening method for the detection of doping relevant small peptides (GHRPs, GnRHs, GHS, and vasopressin-analogues) with molecular weight less than 2 kDa applying DMSO in the mobile phase. The gain in sensitivity was sufficient to inject the urine samples after a 2-fold dilution step omitting a time consuming sample preparation. The employed analytical procedure was validated for the qualitative determination of 36 compounds, including 13 metabolites. The detection limits (LODs) ranged between 50 and 1000 pg/mL and were compliant with the 2 ng/mL minimum detection level required by the World Anti-Doping Agency (WADA) for all the target peptides. To demonstrate the feasibility of the work, urine samples obtained from patients who have been treated with desmopressin or leuprolide and urine samples that have been declared as adverse analytical findings were analyzed. Graphical Abstract ᅟ.
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Affiliation(s)
- Péter Judák
- Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Ghent University, Technologiepark 30 B, B-9052, Zwijnaarde, Belgium.
| | - Janelle Grainger
- Australian Sports Drug Testing Laboratory, National Measurement Institute, 105 Delhi Road, North Ryde, New South Wales, 2113, Australia
| | - Catrin Goebel
- Australian Sports Drug Testing Laboratory, National Measurement Institute, 105 Delhi Road, North Ryde, New South Wales, 2113, Australia
| | - Peter Van Eenoo
- Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Ghent University, Technologiepark 30 B, B-9052, Zwijnaarde, Belgium
| | - Koen Deventer
- Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Ghent University, Technologiepark 30 B, B-9052, Zwijnaarde, Belgium
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29
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Kotronoulas A, Gomez-Gomez A, Segura J, Ventura R, Joglar J, Pozo OJ. Evaluation of two glucuronides resistant to enzymatic hydrolysis as markers of testosterone oral administration. J Steroid Biochem Mol Biol 2017; 165:212-218. [PMID: 27328448 DOI: 10.1016/j.jsbmb.2016.06.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 05/11/2016] [Accepted: 06/17/2016] [Indexed: 10/21/2022]
Abstract
Testosterone (T) has traditionally been the most commonly reported doping agent by doping control laboratories. The screening of T misuse is performed by the quantification of six endogenous androgenic steroids and the ratio T/E included in the Athlete Biological Passport (ABP). The inclusion of additional metabolites can improve the screening capabilities of ABP. In this study, the potential of 3α-glucuronide-6β-hydroxyandrosterone (6OH-Andros3G) and 3α-glucuronide-6β-hydroxyetiocholanolone (6OH-Etio3G) as markers of T oral administration was evaluated. These glucuronides have been shown to be resistant to enzymatic hydrolysis and their quantification by means of liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) was reported as the only way to obtain feasible results. Urine samples were collected from five volunteers before and after the oral administration of 40mg of T undecanoate and were analyzed by a LC-MS/MS method recently developed. Concentration of 6OH-Andros3G and 6OH-Etio3G compounds and those of the glucuronides of T (TG), epitestosterone (EG), androsterone and etiocholanolone were established and different concentration ratios were calculated. The detection windows (DWs) for the T administration obtained by each selected ratio were compared to the one of TG/EG. The results showed that four out of the nine tested markers presented DWs much larger for all volunteers than those obtained by the World Anti-Doping Agency established T/E marker or other alternative markers. The 6OH-Andros3G/EG, 6OH-Etio3G/EG, 6OH-Andros3G/TG and 6OH-Etio3G/TG markers were able to identify the T abuse up to 96h after the administration, extending our detection capability for the misuse up to 84h more than the classic marker. The importance of these markers was also highlighted by their prolonged capacity to detect the T misuse in the case of one volunteer whose TG/EG barely exceeded his individual threshold. As a consequence, the four markers presented in this study seem to have an exceptional potential as biomarkers of T oral administration.
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Affiliation(s)
- Aristotelis Kotronoulas
- Bioanalysis Research Group, IMIM, Hospital del Mar, Doctor Aiguader 88, 08003 Barcelona, Spain; Department of Biological Chemistry and Molecular Modelling, Institute of Advanced Chemistry of Catalonia, Spanish Council for Scientific Research (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Alex Gomez-Gomez
- Bioanalysis Research Group, IMIM, Hospital del Mar, Doctor Aiguader 88, 08003 Barcelona, Spain
| | - Jordi Segura
- Bioanalysis Research Group, IMIM, Hospital del Mar, Doctor Aiguader 88, 08003 Barcelona, Spain; Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Doctor Aiguader 88, 08003 Barcelona, Spain
| | - Rosa Ventura
- Bioanalysis Research Group, IMIM, Hospital del Mar, Doctor Aiguader 88, 08003 Barcelona, Spain; Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Doctor Aiguader 88, 08003 Barcelona, Spain
| | - Jesús Joglar
- Department of Biological Chemistry and Molecular Modelling, Institute of Advanced Chemistry of Catalonia, Spanish Council for Scientific Research (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Oscar J Pozo
- Bioanalysis Research Group, IMIM, Hospital del Mar, Doctor Aiguader 88, 08003 Barcelona, Spain.
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30
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Kwok WH, Choi TLS, Kwok KY, Chan GHM, Wong JKY, Wan TSM. Doping control analysis of 46 polar drugs in horse plasma and urine using a 'dilute-and-shoot' ultra high performance liquid chromatography-high resolution mass spectrometry approach. J Chromatogr A 2016; 1451:41-9. [PMID: 27180888 DOI: 10.1016/j.chroma.2016.05.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/10/2016] [Accepted: 05/02/2016] [Indexed: 12/15/2022]
Abstract
The high sensitivity of ultra high performance liquid chromatography coupled with high resolution mass spectrometry (UHPLC-HRMS) allows the identification of many prohibited substances without pre-concentration, leading to the development of simple and fast 'dilute-and-shoot' methods for doping control for human and equine sports. While the detection of polar drugs in plasma and urine is difficult using liquid-liquid or solid-phase extraction as these substances are poorly extracted, the 'dilute-and-shoot' approach is plausible. This paper describes a 'dilute-and-shoot' UHPLC-HRMS screening method to detect 46 polar drugs in equine urine and plasma, including some angiotensin-converting enzyme (ACE) inhibitors, sympathomimetics, anti-epileptics, hemostatics, the new doping agent 5-aminoimidazole-4-carboxamide-1-β-d-ribofuranoside (AICAR), as well as two threshold substances, namely dimethyl sulfoxide and theobromine. For plasma, the sample (200μL) was protein precipitated using trichloroacetic acid, and the resulting supernatant was diluted using Buffer A with an overall dilution factor of 3. For urine, the sample (20μL) was simply diluted 50-fold with Buffer A. The diluted plasma or urine sample was then analysed using a UHPLC-HRMS system in full-scan ESI mode. The assay was validated for qualitative identification purpose. This straightforward and reliable approach carried out in combination with other screening procedures has increased the efficiency of doping control analysis in the laboratory. Moreover, since the UHPLC-HRMS data were acquired in full-scan mode, the method could theoretically accommodate an unlimited number of existing and new doping agents, and would allow a retrospectively search for drugs that have not been targeted at the time of analysis.
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31
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Liu Y, Lu J, Yang S, Zhang Q, Xu Y. New drostanolone metabolites in human urine by liquid chromatography time-of-flight tandem mass spectrometry and their application for doping control. Steroids 2016; 108:61-7. [PMID: 26826321 DOI: 10.1016/j.steroids.2016.01.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 01/08/2016] [Accepted: 01/16/2016] [Indexed: 11/20/2022]
Abstract
Drostanolone is one of the most frequently detected anabolic androgenic steroids in doping control analysis. Here, we studied drostanolone urinary metabolic profiles using liquid chromatography quadruple time of flight mass spectrometry (LC-QTOF-MS) in full scan and targeted MS/MS modes with accurate mass measurement. The drug was administered to one healthy male volunteer and liquid-liquid extraction along with direct-injection were used to analyze urine samples. Chromatographic peaks for potential metabolites were identified with the theoretical [M-H](-) as a target ion in a full scan experiment and actual deprotonated ions were analyzed in targeted MS/MS mode. Eleven metabolites including five new sulfates, five glucuronide conjugates, and one free metabolite were confirmed for drostanolone. Due to the absence of useful fragment ions to illustrate the steroid ring structure of drostanolone phase II metabolites, gas chromatography mass spectrometry (GC-MS) was used to obtain structural details of the trimethylsilylated phase I metabolite released after enzymatic hydrolysis and a potential structure was proposed using a combined MS approach. Metabolite detection times were recorded and S4 (2α-methyl-5α-androstan-17-one-6β-ol-3α-sulfate) and G1 (2α-methyl-5α-androstan-17-one-3α-glucuronide) were thought to be new potential biomarkers for drostanolone misuse which can be detected up to 24days by liquid-liquid extraction and 7days by direct-injection analysis after intramuscular injection. S4 and G1 were also detected in two drostanolone-positive routine urine samples.
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Affiliation(s)
- Yang Liu
- State Key Laboratory of Natural and Biomimetic Drugs and Department of Natural Medicines, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China
| | - Jianghai Lu
- National Anti-Doping Laboratory, China Anti-Doping Agency, 1st Anding Road, ChaoYang District, Beijing 100029, PR China.
| | - Sheng Yang
- National Anti-Doping Laboratory, China Anti-Doping Agency, 1st Anding Road, ChaoYang District, Beijing 100029, PR China
| | - Qingying Zhang
- State Key Laboratory of Natural and Biomimetic Drugs and Department of Natural Medicines, School of Pharmaceutical Science, Peking University Health Science Center, Beijing 100191, PR China.
| | - Youxuan Xu
- National Anti-Doping Laboratory, China Anti-Doping Agency, 1st Anding Road, ChaoYang District, Beijing 100029, PR China.
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He G, Yang S, Lu J, Xu Y. New long term metabolite in human urine for metenolone misuse by liquid chromatography quadrupole time-of-flight mass spectrometry. Steroids 2016; 105:1-11. [PMID: 26519767 DOI: 10.1016/j.steroids.2015.10.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 10/19/2015] [Accepted: 10/27/2015] [Indexed: 12/28/2022]
Abstract
In this study, metenolone metabolic profiles were investigated. Metenolone was administered to one healthy male volunteer. Liquid-liquid extraction and direct-injection were applied to processing urine samples. Urinary extracts were analyzed by liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QTOFMS) using full scan and product ion scan with accurate mass measurement for the first time. Due to the lack of useful fragment ion for structural elucidation, GC-MS instrumentation was employed to obtain structural details of the trimethylsilylated phase I metabolite released after hydrolysis, and the EI mass spectrum was always informative in steroidal structure studies owing to more useful fragment ions than the ESI mass spectrum. 16 metabolites including 6 glucuronide and 9 unreported sulfate conjugates were characterized and tentatively identified. All the metabolites were evaluated in terms of how long they could be detected. The sulfate conjugate S6 (1-methylen-5α-androst-3,17-dione-2ξ-sulfate) was considered to be a new long term metabolite for metenolone misuse that could be detected 40 days by liquid-liquid extraction and up to 30 days by direct-injection analysis after oral administration.
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Affiliation(s)
- Genye He
- National Anti-doping Laboratory, China Anti-Doping Agency, 1st Anding Road, ChaoYang District, Beijing 100029, PR China; Sport Science College, Beijing Sport University, Beijing 100084, PR China
| | - Sheng Yang
- National Anti-doping Laboratory, China Anti-Doping Agency, 1st Anding Road, ChaoYang District, Beijing 100029, PR China
| | - Jianghai Lu
- National Anti-doping Laboratory, China Anti-Doping Agency, 1st Anding Road, ChaoYang District, Beijing 100029, PR China.
| | - Youxuan Xu
- National Anti-doping Laboratory, China Anti-Doping Agency, 1st Anding Road, ChaoYang District, Beijing 100029, PR China.
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Ahmadi F, Karamian E. Computational aided-molecular imprinted polymer design for solid phase extraction of metaproterenol from plasma and determination by voltammetry using modified carbon nanotube electrode. Iran J Pharm Res 2014; 13:417-29. [PMID: 25237337 PMCID: PMC4157017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
A molecular imprinted polymer (MIP) was computationally designed and synthesized for the selective extraction of metaproterenol (MTP), from human plasma. In this regards semi empirical MP3 and mechanical quantum (DFT) calculations were used to find a suitable functional monomers. On the basis of computational and experimental results, acrylic acid (AA) and DMSO:MeOH (90:10 %V/V) were found to be the best choices of functional monomer and polymerization solvents, respectively. This polymer was then used as a selective sorbent to develop a molecularly imprinted solid-phase extraction (MISPE) procedure followed by differential pulse voltammetry by using modified carbon nanotube electrode. The analysis was performed in phosphate buffer, pH 7.0. Peak currents were measured at +0.67 V versus Ag/AgCl. The linear calibration range was 0.026-8.0 μg mL(-1) with a limit of detection 0.01 μg mL(-1). The relative standard deviation at 0.5 μg mL(-1) was 4.76% (n=5). The mean recoveries of 5 μg mL(-1) MTP from plasma was 92.2% (n=5). The data of MISPE-DPV were compared with the MISPE-HPLC-UV. Although, the MISPE-DPV was more sensitive but both techniques have similar accuracy and precision.
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Affiliation(s)
- Farhad Ahmadi
- Nano Drug Delivery Research Center, Faculty of Pharmacy, Kermanshah Universityof Medical Sciences, Kermanshah, Iran. ,Pharmaceutical Chemistry Department, Faculty of Pharmacy, Kermanshah University of Medical Science, Kermanshah, Iran.,Corresponding author: E-mail:
| | - Ehsan Karamian
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Kermanshah University of Medical Science, Kermanshah, Iran.
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Abstract
Musk is widely used as a traditional drug in Asia for the treatment of stroke, tumour, and cardiopathy with an oral dosage of 0.03-0.1 g per day. Because of the potential anabolic effect, musk preparations have been included in the list of medical products containing prohibited substances employed for doping. The application of musk pod formulation was regarded as the reason of some adverse analytical findings in the 2011 FIFA Women's World Cup. In order to investigate the influence of musk administration on the doping test, we executed a chemical analysis and excretion study. The gas chromatography/mass spectrometry (GC-MS) analysis demonstrated the diversity of steroid concentrations in musk samples. Furthermore, the δ(13)C-values of steroids from wild deer musk showed more depleted than those of domestic deer musk by gas chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS) analysis. Because the steroids from some musk had δ(13)C-values in the range of naturally produced steroids in human body, the possible abuse of this kind of musk is very hard to be detected by isotope ratio mass spectrometry (IRMS) in doping control. Musk grains from wild and domestic deer were administrated for the excretion study respectively. Spot urine samples were collected from two male volunteers before and after 100 mg musk grains administration. The profiles and carbon isotope ratios of urinary steroids were determined by GC-MS and GC/C/IRMS. The ingestion of either wild or domestic deer musk did not lead to the adverse analytical finding of doping control in the single dosage of 100mg.
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Affiliation(s)
- Yi He
- National Institutes for Food and Drug Control, Beijing, China
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Polet M, Van Renterghem P, Van Gansbeke W, Van Eenoo P. Profiling of urinary formestane and confirmation by isotope ratio mass spectrometry. Steroids 2013; 78:1103-9. [PMID: 23933120 DOI: 10.1016/j.steroids.2013.07.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 07/04/2013] [Accepted: 07/29/2013] [Indexed: 10/26/2022]
Abstract
Formestane (F, androst-4-en-4-ol-3,17-dione) is an irreversible aromatase inhibitor with the ability to suppress the estrogen production from anabolic steroids. Consequently, F is mentioned on the World Anti-Doping Agency (WADA) prohibited list and because studies have shown that F is produced endogenously in small amounts, a threshold for urinary excreted F of 150 ng/mL was introduced. Lower concentrations could be due to endogenous production and need further investigation to prove the exact origin through determination of the carbon isotope ratio. However, because the current screening methods are a lot more sensitive, F is detected in practically every urine sample. A strict implementation of this WADA rule would imply that almost every urine sample needs additional investigation to verify an exogenous or endogenous origin. The main aim of this study was to propose and introduce a lower concentration limit of 25 ng/mL beneath which the detected F is considered as being endogenous and no further investigation is needed. The data presented in this paper suggests that this threshold provides a good balance between a sufficiently large detection window and not having to perform isotope ratio mass spectrometry (IRMS) analyses on negative urine samples.
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Affiliation(s)
- Michael Polet
- Ghent University, Department of Clinical Chemistry, Microbiology and Immunology, Doping Control Laboratory, Technologiepark 30 B, B-9052 Zwijnaarde, Belgium.
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Goryński K, Bojko B, Nowaczyk A, Buciński A, Pawliszyn J, Kaliszan R. Quantitative structure-retention relationships models for prediction of high performance liquid chromatography retention time of small molecules: endogenous metabolites and banned compounds. Anal Chim Acta 2013; 797:13-9. [PMID: 24050665 DOI: 10.1016/j.aca.2013.08.025] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 08/10/2013] [Accepted: 08/13/2013] [Indexed: 12/16/2022]
Abstract
Quantitative structure-retention relationship (QSRR) is a technique capable of improving the identification of analytes by predicting their retention time on a liquid chromatography column (LC) and/or their properties. This approach is particularly useful when LC is coupled with a high-resolution mass spectrometry (HRMS) platform. The main aim of the present study was to develop and describe appropriate QSRR models that provide usable predictive capability, allowing false positive identification to be removed during the interpretation of metabolomics data, while additionally increasing confidence of experimental results in doping control area. For this purpose, a dataset consisting of 146 drugs, metabolites and banned compounds from World Anti-Doping Agency (WADA) lists, was used. A QSRR study was carried out separately on high quality retention data determined by reversed-phase (RP-LC-HRMS) and hydrophilic interaction chromatography (HILIC-LC-HRMS) systems, employing a single protocol for each system. Multiple linear regression (MLR) was applied to construct the linear QSRR models based on a variety of theoretical molecular descriptors. The regression equations included a set of three descriptors for each model: ALogP, BELe6, R2p and ALogP(2), FDI, BLTA96, were used in the analysis of reversed-phase and HILIC column models, respectively. Statistically significant QSRR models (squared correlation coefficient for model fitting, R(2)=0.95 for RP and R(2)=0.84 for HILIC) indicate a strong correlation between retention time and the molecular descriptors. An evaluation of the best correlation models, performed by validation of each model using three tests (leave-one-out, leave-many-out, external tests), demonstrated the reliability of the models. This paper provides a practical and effective method for analytical chemists working with LC/HRMS platforms to improve predictive confidence of studies that seek to identify small molecules.
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Affiliation(s)
- Krzysztof Goryński
- Department of Medicinal Chemistry, Collegium Medicum in Bydgoszcz Nicolaus Copernicus University in Toruń, Jurasza 2, 85-094 Bydgoszcz, Poland; Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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Fragkaki AG, Georgakopoulos C, Sterk S, Nielen MWF. Sports doping: emerging designer and therapeutic β2-agonists. Clin Chim Acta 2013; 425:242-58. [PMID: 23954776 DOI: 10.1016/j.cca.2013.07.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Revised: 07/30/2013] [Accepted: 07/31/2013] [Indexed: 12/12/2022]
Abstract
Beta2-adrenergic agonists, or β2-agonists, are considered essential bronchodilator drugs in the treatment of bronchial asthma, both as symptom-relievers and, in combination with inhaled corticosteroids, as disease-controllers. The use of β2-agonists is prohibited in sports by the World Anti-Doping Agency (WADA) due to claimed anabolic effects, and also, is prohibited as growth promoters in cattle fattening in the European Union. This paper reviews the last seven-year (2006-2012) literature concerning the development of novel β2-agonists molecules either by modifying the molecule of known β2-agonists or by introducing moieties producing indole-, adamantyl- or phenyl urea derivatives. New emerging β2-agonists molecules for future therapeutic use are also presented, intending to emphasize their potential use for doping purposes or as growth promoters in the near future.
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Affiliation(s)
- A G Fragkaki
- Doping Control Laboratory of Athens, Olympic Athletic Center of Athens "Spyros Louis", Kifisias 37, 15123 Maroussi, Greece.
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