1
|
Kwok WH, Leung EMK, Chan RCM, Ho ENM. Intelligence-based anti-doping via an Intelligence and Drug Testing Management (IDTM) system. Drug Test Anal 2024. [PMID: 38987978 DOI: 10.1002/dta.3770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/24/2024] [Accepted: 06/30/2024] [Indexed: 07/12/2024]
Abstract
The Intelligence and Drug Testing Management (IDTM), a system that can enhance drug testing analytics with related horse information and intelligence in a single platform, can help identify and mitigate potential doping and other threats.
Collapse
Affiliation(s)
- Wai Him Kwok
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin, N.T., Hong Kong, China
| | - Elvis M K Leung
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin, N.T., Hong Kong, China
| | - Richard C M Chan
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin, N.T., Hong Kong, China
| | - Emmie N M Ho
- Racing Laboratory, The Hong Kong Jockey Club, Sha Tin, N.T., Hong Kong, China
| |
Collapse
|
2
|
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] [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.
Collapse
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
| |
Collapse
|
3
|
From targeted methods to metabolomics based strategies to screen for growth promoters misuse in horseracing and livestock: A review. Food Control 2023. [DOI: 10.1016/j.foodcont.2023.109601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
4
|
Tou K, Cawley A, Bowen C, Bishop DP, Fu S. Towards Non-Targeted Screening of Lipid Biomarkers for Improved Equine Anti-Doping. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010312. [PMID: 36615506 PMCID: PMC9822433 DOI: 10.3390/molecules28010312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 12/22/2022] [Accepted: 12/24/2022] [Indexed: 01/03/2023]
Abstract
The current approach to equine anti-doping is focused on the targeted detection of prohibited substances. However, as new substances are rapidly being developed, the need for complimentary methods for monitoring is crucial to ensure the integrity of the racing industry is upheld. Lipidomics is a growing field involved in the characterisation of lipids, their function and metabolism in a biological system. Different lipids have various biological effects throughout the equine system including platelet aggregation and inflammation. A certain class of lipids that are being reviewed are the eicosanoids (inflammatory markers). The use of eicosanoids as a complementary method for monitoring has become increasingly popular with various studies completed to highlight their potential. Studies including various corticosteroids, non-steroidal anti-inflammatories and cannabidiol have been reviewed to highlight the progress lipidomics has had in contributing to the equine anti-doping industry. This review has explored the techniques used to prepare and analyse samples for lipidomic investigations in addition to the statistical analysis and potential for lipidomics to be used for a longitudinal assessment in the equine anti-doping industry.
Collapse
Affiliation(s)
- Kathy Tou
- Centre for Forensic Science, University of Technology Sydney, Sydney, NSW 2007, Australia
- Correspondence:
| | - Adam Cawley
- Australian Racing Forensic Laboratory, Racing NSW, Sydney, NSW 2000, Australia
| | - Christopher Bowen
- Mass Spectrometry Business Unit, Shimadzu Scientific Instruments (Australasia), Sydney, NSW 2116, Australia
| | - David P. Bishop
- Hyphenated Mass Spectrometry Laboratory (HyMAS), University of Technology, Sydney, NSW 2007, Australia
| | - Shanlin Fu
- Centre for Forensic Science, University of Technology Sydney, Sydney, NSW 2007, Australia
| |
Collapse
|
5
|
Keen B, Cawley A, Reedy B, Fu S. Metabolomics in clinical and forensic toxicology, sports anti-doping and veterinary residues. Drug Test Anal 2022; 14:794-807. [PMID: 35194967 PMCID: PMC9544538 DOI: 10.1002/dta.3245] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 02/13/2022] [Accepted: 02/15/2022] [Indexed: 11/29/2022]
Abstract
Metabolomics is a multidisciplinary field providing workflows for complementary approaches to conventional analytical determinations. It allows for the study of metabolically related groups of compounds or even the study of novel pathways within the biological system. The procedural stages of metabolomics; experimental design, sample preparation, analytical determinations, data processing and statistical analysis, compound identification and validation strategies are explored in this review. The selected approach will depend on the type of study being conducted. Experimental design influences the whole metabolomics workflow and thus needs to be properly assessed to ensure sufficient sample size, minimal introduced and biological variation and appropriate statistical power. Sample preparation needs to be simple, yet potentially global in order to detect as many compounds as possible. Analytical determinations need to be optimised either for the list of targeted compounds or a universal approach. Data processing and statistical analysis approaches vary widely and need to be better harmonised for review and interpretation. This includes validation strategies that are currently deficient in many presented workflows. Common compound identification approaches have been explored in this review. Metabolomics applications are discussed for clinical and forensic toxicology, human and equine sports anti-doping and veterinary residues.
Collapse
Affiliation(s)
- Bethany Keen
- Centre for Forensic ScienceUniversity of Technology SydneyBroadwayNew South WalesAustralia
| | - Adam Cawley
- Australian Racing Forensic LaboratoryRacing NSWSydneyNew South WalesAustralia
| | - Brian Reedy
- School of Mathematical and Physical SciencesUniversity of Technology SydneyBroadwayNew South WalesAustralia
| | - Shanlin Fu
- Centre for Forensic ScienceUniversity of Technology SydneyBroadwayNew South WalesAustralia
| |
Collapse
|
6
|
Elbourne M, Cawley A, Stanley S, Bowen C, Fu S. Intelligence benefit of the 3-methoxytyramine to tyramine ratio in equine urine. Drug Test Anal 2022; 14:936-942. [PMID: 35343638 DOI: 10.1002/dta.3264] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 02/03/2022] [Accepted: 03/21/2022] [Indexed: 11/07/2022]
Abstract
Equine urine analysis has evolved over time to detect thousands of urinary compounds for doping control in the horse racing industry. The longitudinal assessment of 3-methoxytyramine to tyramine ratio (3-MT/T) values in equine urine by GC-MS profiling was investigated to support the Racing NSW Equine Biological Passport (EBP) for detection of dopaminergic manipulation in racehorses. This involved comparison of routine urine samples to administration studies of Sinemet, a common Parkinson's disease medication containing levodopa. Using an endogenous reference compound (ERC) in a urinary ratio enabled greater confidence to provide intelligence of pharmaceutical manipulation as distinct from physiological variation. Population Reference Limits (PRLs) of 776 ng/mL for urinary 3-MT and 5.3 for 3-MT/T, together with the use of Individual Reference Limits (IRLs) are proposed.
Collapse
Affiliation(s)
- Madysen Elbourne
- University of Technology Sydney, Sydney, New South Wales, Australia
| | - Adam Cawley
- Australian Racing Forensic Laboratory, Racing NSW, Sydney, New South Wales, Australia
| | - Shawn Stanley
- Racing Science Centre, Queensland Racing Integrity Commission, Hamilton, Queensland, Australia
| | - Christopher Bowen
- Shimadzu Scientific Instruments Australasia Pty Ltd, Rydalmere, New South Wales, Australia
| | - Shanlin Fu
- University of Technology Sydney, Sydney, New South Wales, Australia
| |
Collapse
|
7
|
Cawley A, Keen B, Tou K, Elbourne M, Keledjian J. Biomarker ratios. Drug Test Anal 2022; 14:983-990. [PMID: 35293161 DOI: 10.1002/dta.3250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/06/2022] [Accepted: 03/06/2022] [Indexed: 12/21/2022]
Affiliation(s)
- Adam Cawley
- Australian Racing Forensic Laboratory, Racing NSW, Sydney, NSW, Australia
| | - Bethany Keen
- Centre for Forensic Science, University of Technology Sydney, Broadway, NSW, Australia
| | - Kathy Tou
- Centre for Forensic Science, University of Technology Sydney, Broadway, NSW, Australia
| | - Madysen Elbourne
- Centre for Forensic Science, University of Technology Sydney, Broadway, NSW, Australia
| | - John Keledjian
- Australian Racing Forensic Laboratory, Racing NSW, Sydney, NSW, Australia
| |
Collapse
|
8
|
Tou K, Cawley A, Bowen C, Sornalingam K, Fu S. Measurements of Hydrocortisone and Cortisone for Longitudinal Profiling of Equine Plasma by LC-MS/MS. Drug Test Anal 2022; 14:943-952. [PMID: 35195373 PMCID: PMC9545025 DOI: 10.1002/dta.3244] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 02/03/2022] [Accepted: 02/14/2022] [Indexed: 11/17/2022]
Abstract
The conventional detection of exogenous drugs in equine doping samples has been used for confirmation and subsequent prosecution of participants responsible. In recent years, alternative methods using indirect detection have been investigated due to the expanding number of pharmaceutical agents available with the potential of misuse. The monitoring of endogenous biomarkers such as hydrocortisone (HC) has been studied in equine urine with an international threshold of 1 μg/ml established; however, there is no current threshold for equine plasma. The aim of this research was to investigate plasma concentrations of HC and cortisone (C) in race day samples compared to an administration of Triamcinolone Acetonide (TACA). The reference population (n = 1150) provided HC (6 to 145 ng/ml) and C (0.7 to 13 ng/ml) levels to derive the HC to C ratio (HC/C). Population reference limits (PRLs) were proposed for HC/C values at 0.2 (lower) and 61 (upper). Administration of TACA resulted in down‐regulation of HC/C values below the estimated PRLs for up to 96 h post‐administration. This indirect detection period was longer than the detection of TACA for 72 h. The use of individual reference limits (IRLs) for HC/C values was investigated to support the Equine Biological Passport (EBP), an intelligence model developed by Racing NSW for longitudinal monitoring of biomarkers.
Collapse
Affiliation(s)
- Kathy Tou
- Centre for Forensic Science, University of Technology Sydney, Broadway, NSW, Australia
| | - Adam Cawley
- Australian Racing Forensic Laboratory, Racing NSW, Sydney, NSW, Australia
| | - Christopher Bowen
- Mass Spectrometry Business Unit, Shimadzu Scientific Instruments (Australasia), Rydalmere, NSW, Australia
| | | | - Shanlin Fu
- Centre for Forensic Science, University of Technology Sydney, Broadway, NSW, Australia
| |
Collapse
|
9
|
Developments in high-resolution mass spectrometric analyses of new psychoactive substances. Arch Toxicol 2022; 96:949-967. [PMID: 35141767 PMCID: PMC8921034 DOI: 10.1007/s00204-022-03224-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 01/12/2022] [Indexed: 11/17/2022]
Abstract
The proliferation of new psychoactive substances (NPS) has necessitated the development and improvement of current practices for the detection and identification of known NPS and newly emerging derivatives. High-resolution mass spectrometry (HRMS) is quickly becoming the industry standard for these analyses due to its ability to be operated in data-independent acquisition (DIA) modes, allowing for the collection of large amounts of data and enabling retrospective data interrogation as new information becomes available. The increasing popularity of HRMS has also prompted the exploration of new ways to screen for NPS, including broad-spectrum wastewater analysis to identify usage trends in the community and metabolomic-based approaches to examine the effects of drugs of abuse on endogenous compounds. In this paper, the novel applications of HRMS techniques to the analysis of NPS is reviewed. In particular, the development of innovative data analysis and interpretation approaches is discussed, including the application of machine learning and molecular networking to toxicological analyses.
Collapse
|
10
|
Loup B, André F, Avignon J, Lhuaire M, Delcourt V, Barnabé A, Garcia P, Popot MA, Bailly-Chouriberry L. miRNAs detection in equine plasma by quantitative polymerase chain reaction for doping control: Assessment of blood sampling and study of eca-miR-144 as potential erythropoiesis stimulating agent biomarker. Drug Test Anal 2021; 14:953-962. [PMID: 33860991 DOI: 10.1002/dta.3047] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/11/2021] [Accepted: 04/12/2021] [Indexed: 01/21/2023]
Abstract
Short half-life doping substances are, quickly eliminated and therefore difficult to control with traditional analytical chemistry methods. Indirect methods targeting biomarkers constitute an alternative to extend detection time frames in doping control analyses. Gene expression analysis (i.e., transcriptomics) has already shown interesting results in both humans and equines for erythropoietin (EPO), growth hormone (GH), and anabolic androgenic steroid (AAS) misuses. In humans, circulating cell-free microRNAs in plasma were described as new potential biomarkers for control of major doping agent (MDA) abuses. The development of a quantitative polymerase chain reaction (qPCR) method allowing the detection of circulating miRNAs was carried out on equine plasma collected on different type of tubes (EDTA, lithium-heparin [LiHep]). Although analyzing plasma collected in EDTA tubes is a standard method in molecular biology, analyzing plasma collected in LiHep tubes is challenging, as heparin is a reverse transcription (RT) and a PCR inhibitor. Different strategies were considered, and attention was paid on both miRNAs extraction quality and detection sensitivity. The detection of endogenous circulating miRNAs was performed and compared between the different types of tubes. In parallel, homologs of human miRNAs characterized as potential biomarkers of doping were sought in equine databases. The miRNA eca-miR-144, described as potential erythropoiesis stimulating agents (ESAs) administration candidate biomarker was retained and assessed in equine post-administration samples. The results about the qPCR method development and optimization are exposed as well as the equine miRNAs detection. To our knowledge, this work is the first study and the proof of concept of circulating miRNAs detection in plasma dedicated to equine doping control.
Collapse
Affiliation(s)
- Benoit Loup
- GIE Laboratoire des Courses Hippiques (LCH), 15 rue de Paradis, Verrières le Buisson, 91300, France
| | - François André
- GIE Laboratoire des Courses Hippiques (LCH), 15 rue de Paradis, Verrières le Buisson, 91300, France
| | - Justine Avignon
- GIE Laboratoire des Courses Hippiques (LCH), 15 rue de Paradis, Verrières le Buisson, 91300, France
| | - Marion Lhuaire
- GIE Laboratoire des Courses Hippiques (LCH), 15 rue de Paradis, Verrières le Buisson, 91300, France
| | - Vivian Delcourt
- GIE Laboratoire des Courses Hippiques (LCH), 15 rue de Paradis, Verrières le Buisson, 91300, France
| | - Agnès Barnabé
- GIE Laboratoire des Courses Hippiques (LCH), 15 rue de Paradis, Verrières le Buisson, 91300, France
| | - Patrice Garcia
- GIE Laboratoire des Courses Hippiques (LCH), 15 rue de Paradis, Verrières le Buisson, 91300, France
| | - Marie-Agnès Popot
- GIE Laboratoire des Courses Hippiques (LCH), 15 rue de Paradis, Verrières le Buisson, 91300, France
| | | |
Collapse
|
11
|
Keen B, Cawley A, Fouracre C, Pyke J, Fu S. Towards an untargeted mass spectrometric approach for improved screening in equine antidoping. Drug Test Anal 2021; 13:1001-1007. [PMID: 33629815 DOI: 10.1002/dta.3021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 02/10/2021] [Accepted: 02/22/2021] [Indexed: 12/31/2022]
Abstract
The emergence of novel doping agents is a continuous issue for analysts who aim to maintain the integrity of horseracing together with the well-being and safety of the animals and riders involved. Untargeted mass spectrometric analysis presents a potential improvement for antidoping as it enables the detection of compounds being indirectly affected by an administered drug. In this study, liquid chromatography-high-resolution mass spectrometry was used to investigate a 12-horse administration study of the synthetic opioid, butorphanol. A mass spectrometric workflow capable of detecting metabolic differences for an extended period of time was successfully developed. This proof-of-concept study demonstrates the potential of untargeted workflows to provide a list of biomarkers of exposure and effect that are indicative of drug administration which may be implemented into routine testing for improved doping control.
Collapse
Affiliation(s)
- Bethany Keen
- Centre for Forensic Science, University of Technology Sydney, Sydney, New South Wales, Australia
| | - Adam Cawley
- Australian Racing Forensic Laboratory, Racing NSW, Sydney, New South Wales, Australia
| | | | - James Pyke
- Agilent Technologies, Santa Clara, California, USA
| | - Shanlin Fu
- Centre for Forensic Science, University of Technology Sydney, Sydney, New South Wales, Australia
| |
Collapse
|
12
|
Skalny AV, Zaitseva IP, Gluhcheva YG, Skalny AA, Achkasov EE, Skalnaya MG, Tinkov AA. Cobalt in athletes: hypoxia and doping - new crossroads. J Appl Biomed 2019; 17:28. [DOI: 10.32725/jab.2018.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 10/15/2018] [Indexed: 12/12/2022] Open
|
13
|
Viljanto M, Hincks P, Hillyer L, Cawley A, Suann C, Noble G, Walker CJ, Parkin MC, Kicman AT, Scarth J. Monitoring dehydroepiandrosterone (DHEA) in the urine of Thoroughbred geldings for doping control purposes. Drug Test Anal 2018; 10:1518-1527. [PMID: 29797687 DOI: 10.1002/dta.2411] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 05/12/2018] [Accepted: 05/12/2018] [Indexed: 01/01/2023]
Abstract
The use of testosterone and its pro-drugs, such as dehydroepiandrosterone (DHEA), is currently regulated in horseracing by the application of international testosterone thresholds. However, additional steroidomic approaches, such as steroid ratios, to distinguish overall adrenal stimulation from drug administrations and an equine biological passport for longitudinal steroid profiling of individual animals could be advantageous in equine doping testing. Thus, DHEA concentrations and related ratios (testosterone [T] to DHEA and DHEA to epitestosterone [E]) were assessed in the reference population by quantitative analysis of 200 post-race gelding urine samples using liquid chromatography-tandem mass spectrometry. DHEA concentrations ranged between 0.9 and 136.6 ng/mL (mean 12.8 ng/mL), T:DHEA ratios between 0.06 and 1.85 (mean 0.43), and DHEA:E ratios between 0.21 and 13.56 (mean 2.20). Based on the reference population statistical upper limits of 5.4 for T:DHEA ratio and 48.1 for DHEA:E ratio are proposed with a risk of 1 in 10 000 for a normal outlier exceeding the value. Analysis of post-administration urine samples collected following administrations of DHEA, Equi-Bolic® (a mix of DHEA and pregnenolone) and testosterone propionate to geldings showed that the upper limit for T:DHEA ratio was exceeded following testosterone propionate administration and DHEA:E ratio following DHEA administrations and thus these ratios could be used as additional biomarkers when determining the cause of an atypical testosterone concentration. Additionally, DHEA concentrations and ratios can be used as a starting point to establish reference ranges for an equine biological passport.
Collapse
Affiliation(s)
- Marjaana Viljanto
- LGC, Fordham, Cambridgeshire, UK.,Drug Control Centre, Analytical and Environmental Sciences Research Divisions, King's College London, UK
| | | | - Lynn Hillyer
- The Turf Club, The Curragh, Kildare, Co Kildare, Ireland
| | | | | | - Glenys Noble
- School of Animal and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW, Australia
| | - Christopher J Walker
- Drug Control Centre, Analytical and Environmental Sciences Research Divisions, King's College London, UK
| | - Mark C Parkin
- Drug Control Centre, Analytical and Environmental Sciences Research Divisions, King's College London, UK
| | - Andrew T Kicman
- Drug Control Centre, Analytical and Environmental Sciences Research Divisions, King's College London, UK
| | | |
Collapse
|
14
|
Cawley A. Advances in equine anti-doping. Drug Test Anal 2017. [DOI: 10.1002/dta.2231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Adam Cawley
- Australian Racing Forensic Laboratory; Racing NSW; Australia
| |
Collapse
|