IMIM (Hospital del Mar Medical Research Institute)
Barcelona, 08003, Spain
NCT Number: NCT04166786
Background:
Testosterone is an anabolic steroid widely known to improve physical performance. Its consumption is banned by the World Anti-Doping Agency (WADA). The steroid profile is one of the components of the Athlete's Biological Passport (ABP), which consists of selected biological variables that indirectly reveal the effects of doping. Alcohol consumption has been proved to alter the steroid profile and this may lead to the use of ethanol as a masking agent for testosterone administration.
Hypothesis:
Ratios of different testosterone biomarkers vary after ethanol administration: [6-hydroxy-androsterone-3-glucuronide (6OH-Andros3G) / epitestosterone-glucuronide (EG)] and [6-hydroxy-etiocholanolone-3-glucuronide (6OH-Etio3G) / EG] decrease, while [testosterone-glucuronide (TG) / EG] increases.
Primary objective:
To evaluate if the combination of the markers TG, EG, 6OH-Andros3G and 6OH-Etio3G, as well as ethyl glucuronide (EtG) and ethyl sulfate (EtS), can be routinely used to differentiate between changes in the steroid profile due exclusively to the consumption of alcohol and those produced when alcohol is consumed during a testosterone administration.
Secondary objectives:
1. To explore the potential of the simultaneous determination of both phase I and phase II metabolites in alternative matrices (plasma from blood samples collected as for the haematological module of ABP, or saliva) in the screening of testosterone misuse. 2. To look for the differences into a comprehensive steroid profile (determined in urine, plasma and saliva) between samples collected after testosterone administration and after the combination of testosterone and ethanol.
Methods:
Phase I, single-blind, crossover-design clinical trial, placebo controlled, with 4 conditions randomly assigned in male healthy caucasian subjects with a wash-out period between treatments.
Looking for future studies?
Notify Me18 year–40 year
Male
Interventional
Phase 1
Barcelona, 08003, Spain
Healthy volunteers accepted: Yes
Only the study team can determine whether someone qualifies for participation.
Inclusion criteria
Exclusion criteria
Subjects receive a daily transdermal dose of 100 mg of testosterone (2 sachets of 5 g of gel) during 3 days.
Other names: Testogel 50 mg®
Subjects receive a daily administration of 30 g of ethanol (94 mL of Vodka Absolut® diluted in 300 mL of lemon-flavoured water Fontvella®) during 3 days.
Other names: Vodka Absolut®
Subjects receive a daily transdermal dose of 5 g of pure vaseline ointment during 3 days.
Other names: Vaselina Pura Pege®
Subjects receive a daily administration of 394 mL of lemon-flavored-water Fontvella® during 3 days.
Other names: Lemon flavored-water Fontvella®
Time frame: From baseline (pre-administration) to 48 hours after last administration (fractions: 0-2, 2-4, 4-6, 6-8, 8-24 hours each day, and 24-48 hours post-administration last day)
Variation of the concentration of different endogenous steroids (testosterone, epitestosterone, androsterone, etiocholanolone, 3a,5a-androstanediol, 3a,5b-androstanediol, DHEAS, 5PTS, 5PDS, PTG, PDG) in urine before and after treatment administration.
Time frame: From baseline (pre-administration) to 8 hours post-administration (at 0, 2, 4, 6, 8 hours each day)
Variation of the concentration of new steroid profile markers (6OH-Andros3G, 6OH-Etio3G, testosterone free TG, Andros, Andros3G, Etio, Etio3G) in plasma before and after treatment administration.
Time frame: From baseline (pre-administration) to 8 hours post-administration (at 0, 2, 4, 6, 8 hours each day)
Variation of the concentration of new steroid profile markers (6OH-Andros3G, 6OH-Etio3G, testosterone free TG, Andros, Andros3G, Etio, Etio3G) in saliva before and after treatment administration.
Time frame: From baseline (pre-administration) to 48 hours post-administration (fractions: 0-2, 2-4, 4-6, 6-8, 8-24, 24-48 hours)
Variation of the concentration of Ethyl glucuronide in urine before and after treatment administration.
Time frame: From baseline (pre-administration) to 48 hours post-administration (fractions: 0-2, 2-4, 4-6, 6-8, 8-24, 24-48 hours)
Variation of the concentration of Ethyl sulfate in urine before and after treatment administration.
Parc de Salut Mar
Other
Steroid Profile: Differentiating Testosterone Administration From (Simultaneous) Ethanol Consumption: Evaluation of Newly Developed Markers
Acronym: SPOL1
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View the official ClinicalTrials.gov record (opens in a new tab)This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.
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